CMS Energy Corporation (CMS, NYSE)
Industry: Utilities - Regulated Electric
Annual report, fiscal year 2010


CMS ENERGY

# ANNUAL
REPORT

2010



## CMS ENERGY FINANCIAL HIGHLIGHTS

Millions of dollars, except per share amounts and as noted

<table><tr><td>December 31</td><td>2010</td><td>2009</td></tr><tr><td>Revenue</td><td></td><td></td></tr><tr><td>Electric utility</td><td>$ 3,802</td><td>$ 3,407</td></tr><tr><td>Gas utility</td><td>2,354</td><td>2,556</td></tr><tr><td>Enterprises</td><td>238</td><td>216</td></tr><tr><td>Other</td><td>38</td><td>26</td></tr><tr><td>Total Revenue</td><td>$ 6,432</td><td>$ 6,205</td></tr><tr><td>Net income available to common stockholders</td><td>$ 324</td><td>$ 218</td></tr><tr><td>Per common share</td><td></td><td></td></tr><tr><td>Earnings - basic</td><td>$ 1.40</td><td>$ 0.96</td></tr><tr><td>Earnings - diluted</td><td>$ 1.28</td><td>$ 0.91</td></tr><tr><td>Book value (year-end)</td><td>$ 11.19</td><td>$ 11.42</td></tr><tr><td>Market price (year-end)</td><td>$ 18.60</td><td>$ 15.66</td></tr><tr><td>Average common shares outstanding (thousands)</td><td>231,473</td><td>227,169</td></tr><tr><td>Electric utility sales (billions of kWh)</td><td>38</td><td>36</td></tr><tr><td>Electric utility customers (thousands)</td><td>1,792</td><td>1,796</td></tr><tr><td>Gas utility sales and transportation deliveries (bcf)</td><td>317</td><td>319</td></tr><tr><td>Gas utility customers (thousands) \( ^{(a)} \)</td><td>1,711</td><td>1,708</td></tr></table>

 \( ^{(a)} \) Excludes off-system transportation customers

## ABOUT CMS ENERGY

CMS Energy, based in Jackson, Michigan, is an energy company that is principally focused on utility operations in Michigan. Its principal business is Consumers Energy, a utility that provides electricity and/or natural gas to 6.8 million of Michigan's 10 million residents. Its non-utility businesses are operated by CMS Enterprises and are focused on domestic independent power production.



## DEAR SHAREOWNERS:

I’m pleased to report that CMS Energy performed well in 2010, both operationally and financially. We took a number of important steps last year to strengthen the business and its long-term financial performance, while at the same time providing immediate value to our investors despite the challenging economy.

For 2010, CMS Energy had reported net income available to common shareowners of $324 million, or $1.28 per share, compared to reported net income available to common shareowners of $218 million, or $0.91 per share, for 2009. The 2009 results included a one-time charge of $79 million, or $0.33 per share, linked to a Michigan Public Service Commission (MPSC) refund order, now completed, for CMS Energy’s principal subsidiary, Consumers Energy, a Michigan electric and natural gas utility.

We increased our common stock dividend twice in 2010, to 84 cents per share on an annualized basis, a 68 percent increase from 2009. We have increased the dividend four times since restoring it in 2007 and now have a payout ratio of 58 percent, which is competitive for our industry. With the increases in the dividend, our 2010 total shareowner return (net stock price change plus dividends paid during that period) was 23 percent, compared to the 16 percent average for our industry peer group. In 2010, our market capitalization (the stock price multiplied by the number of outstanding shares) increased by about $1 billion, or about 28 percent.

Our 2010 results reflect aggressive management of our operating costs, primarily at Consumers Energy, the nation’s fourth largest combination utility. In 2010, we restructured the company and reduced the workforce by 5 percent, which is expected to reduce costs by about $30 million annually. This helped us improve productivity by 14 percent in 2010. We also signed new five-year union contracts that provide increased sharing of health care costs and changed post-retirement health benefits. Going forward, this eliminates the legacy costs for all new salaried and union employees, reducing the company’s overall risk. Our focus on controlling costs helps hold down rates for customers. It also positions us well for timely recovery of the major investments we’re making to provide value for our customers and benefits for investors. We’re an industry leader in this area, ranking at the top of the first quartile in industry benchmarking for controlling overhead costs.

Last year’s results also reflect the timely rate recovery of the substantial investments we’re making in our Consumers Energy operations to serve customers and improve the environment. The state’s constructive regulatory climate largely is a result of Michigan’s 2008 energy law. The regulatory reforms in the law have provided more predictability for the company, encouraging job-creating investments that help the company grow its earnings.

Customer value is one of the cornerstones of our business strategy and last year we enhanced customer value on several different fronts. We continued to make investments to improve the reliability of our electric distribution system, reducing customer outage minutes by 13 percent last year. Over the past five years, we’ve reduced outage minutes by 36 percent. In 2010, we improved several points of contact with our customers by redesigning the customer bills, our website, and improving the performance of our call centers. We also launched a new Corporate Social Responsibility website to communicate to customers, policymakers, shareholders, and others about the positive environmental, economic and social impact that the company and its nearly 8,000 employees have in Michigan. In 2011, we



plan to step up our focus on customer service, in particular improving first-time service quality.

In 2010, we spent more than $56 million on our various energy efficiency programs, which have received a strong positive response from customers. More than 314,000 of our customers have participated in these programs since they began in mid-2009. Through these programs, our customers saved energy and money. Our shareowners also have benefited because our programs exceeded the annual energy savings targets set by the MPSC, earning incentives for the company for the past two years.

Over the next five years, we plan to invest more than $6 billion in our utility operations and expect those investments to result in rate base and earnings per share growth of 5 percent to 7 percent annually. More than 80 percent of this planned $6 billion investment will go to maintaining our electric and natural gas distribution systems, meeting new environmental requirements for our generating fleet, and achieving the 10 percent renewable energy standard set by Michigan’s 2008 energy law. The remaining investments planned are targeted at improving safety, system reliability, and creating a Smart Grid infrastructure.

While making these investments, we plan to strike a good balance between price and enhanced customer value by holding customer base rate increases as a percentage of the total bill to about the rate of inflation through a sharp focus on cost management and maximizing the customer benefits from our investment program.

Our renewable energy and Smart Grid programs continue to offer growth opportunities for the company. All the major contracts for the company’s first wind farm, the Lake Winds Energy Park, have been signed and have been approved by the MPSC. We expect construction to begin later this year and the 100-megawatt energy park to begin operation in 2012. We also continue to develop the Cross Winds Energy Park, a 150-megawatt facility expected to begin operation in 2014. We plan to invest about $600 million in these wind farms over the next five years. The development of these energy parks will maintain Consumers Energy’s leadership in renewable energy. We already are the largest supplier of renewable energy in Michigan, with about 5 percent of the power that we supplied to customers in 2010 coming from renewable sources. Recently, we announced plans to reduce the previously approved customer surcharges for our renewable energy program by $55 million a year to reflect the latest market conditions and improvements in wind turbine technology.

Earlier this year, we signed a major contract for an $800 million upgrade to the Ludington Pumped Storage Plant to increase its output by 300 megawatts to nearly 2,200 megawatts. The company owns 51 percent of the facility and also operates it. We expect the Ludington facility to play an increasingly important role as a storage facility for renewable energy produced during off-peak periods, helping to make it more reliable and affordable for customers.

We also continued development of our Smart Grid program in 2010 and selected a Grand Rapids neighborhood for a pilot program called SmartStreet that merges the smart meter technology with our successful energy efficiency programs. We plan to use the lessons and data from that pilot and tests conducted last year in Jackson County to refine our Smart Grid program, which is scheduled to begin deploying the smart meter technology in 2012.



As part of the SmartStreet program, we installed the first public charging station for plug-in electric vehicles (PEVs) in west Michigan. The company is a strong supporter of PEVs for a number of reasons, mainly: Widespread customer use of PEVs would create a new market for our power; charging PEVs at night would allow us to better utilize available baseload generating units; and the rise of PEVs offers domestic automakers and Michigan a significant economic development opportunity.

Although the economic challenges continue in Michigan, we saw some encouraging signs of recovery last year. Specifically, sales to our industrial customers were up 10 percent, compared to 2009, and although residential and commercial sales lagged, our total weather-adjusted electric sales were up 2 percent year-over-year. While last year’s results were encouraging and we expect more growth this year, we are planning for the economic recovery to move at a modest pace. We are supporting the efforts of Michigan’s governor and other state policymakers to help revitalize Michigan’s economy and improve its investment climate.

The ongoing economic uncertainties and current market conditions continue to validate our decision last year to defer development of an 830-megawatt clean coal unit and shift our planned investment in the plant to other utility investments.

We deferred development because of the recession, forecasted lower natural gas prices from the recent developments in shale gas recovery technology, and projected surplus generating capacity in the Midwest market. We still believe that new clean coal generating capacity remains a good long-term option to serve our 1.8 million electric customers as part of a balanced energy portfolio, but at this time the most prudent course is to defer development of the plant. We still have a valid air permit for the plant and regularly assess customer demand, market prices for power, and the projections for natural gas prices. We have not set a timetable for further decisions about this project and any decision will be based on what is in the best interest of our customers and our investors.

No summary of 2010 would be complete without noting the management transition that took place at CMS Energy and Consumers Energy. As you’ll recall, Kenneth Whipple, the chairman of the Board of Directors, and Joseph F. Paquette Jr., a former company president who served as the presiding director, both retired last year. David Joos, the president and chief executive officer, also elected to retire and became the non-executive chairman of the Board while Philip R. Lochner Jr. was elected to serve as the presiding director. This transition was seamless thanks to the forethought and planning done by the Board, which deserves recognition and thanks for ensuring the stability of the company and its successful Growing Forward strategy. I’d also like to acknowledge our executive team for being strong, experienced and focused during this transition.

To sum up, 2010 was a successful year for the company in many ways. We continued to implement our proven strategy of making investments in our utility to serve customers, improve the environment, and provide value for our investors. Our 2010 results reflect the strength of this utility-focused strategy.

Much of the credit for our success lies with the dedicated employees who are proud to wear our colors and work hard every day to serve our customers. They deserve our thanks for their commitment to safety, customer service, environmental stewardship, and to the communities we serve.



Of all our results in 2010, I’m most proud of our improvement in employee safety, a 23 percent reduction in safety incidents. Since 2007, we have been able to reduce safety incidents by 64 percent through a culture change involving management, union leadership, and employees. It’s truly a team effort that has united our workforce in a drive to achieve zero safety incidents.

As I look ahead, I’m excited about the company’s prospects. Our Growing Forward strategy (see image below) is strong and durable and offers benefits to our customers and investors. We will continue to make substantial investments in Consumers Energy to add value for customers and to reduce operating and fuel costs. We expect our Growing Forward strategy to continue to create value for investors through steady earnings growth and a competitive dividend.

Thanks for your continued support.

Sincerely,



John G. Russell

President and Chief Executive Officer

March 24, 2011



Growing Forward Strategy



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## BOARD OF DIRECTORS

Merribel S. Ayres
(A, G)
President, Lighthouse Consulting Group, LLC.
Formerly Chief Executive Officer of the National Independent Energy Producers.

Jon E. Barfield
(F, G)
Chairman and President of the Bartech Group, Inc.

Stephen E. Ewing
(C, F)
Retired. Formerly Vice Chairman of DTE Energy and formerly President and Chief Executive Officer of Michigan Consolidated Gas Company.

Richard M. Gabrys
(A, C)
Formerly Interim Dean of the School of Business
Administration of Wayne State University.
Retired Vice Chairman of Deloitte & Touche LLP.

David W. Joos
(E*)
Chairman of the Board, CMS Energy and Consumers Energy. Formerly President and Chief Executive Officer of CMS Energy and Chief Executive Officer of Consumers Energy.
Philip R. Lochner, Jr.
(A, E, G*)
Presiding Director of CMS Energy and Consumers Energy and Director of several public companies.

Michael T. Monahan
(A*, E, F)
President, Monahan Enterprises, LLC. Formerly Chairman and Chief Executive Officer of Munder Capital Management and President of Comerica Bank.

John G. Russell
President and Chief Executive Officer of CMS Energy and Consumers Energy. Formerly President and Chief Operating Officer of Consumers Energy.

Kenneth L. Way
(C, E, F*)
Retired. Formerly Chairman and Chief Executive Officer of Lear Corporation.

John B. Yasinsky
(C*, E, G)
Retired. Formerly Chairman and Chief Executive Officer of OMNOVA Solutions Inc. and Chairman and Chief Executive Officer of GenCorp.

A = Audit Committee
C = Compensation and Human Resources Committee
E = Executive Committee
F = Finance Committee
G = Governance and Public Responsibility Committee
* = Committee Chair



## Executive Officers

John G. Russell
President and Chief Executive Officer, CMS
Energy and Consumers Energy

Thomas J. Webb
Executive Vice President and Chief Financial Officer, CMS Energy and Consumers Energy

James E. Brunner
Senior Vice President and General Counsel,
CMS Energy and Consumers Energy

John M. Butler
Senior Vice President, Human Resources and Shared Services, CMS Energy and Consumers Energy

David G. Mengebier
Senior Vice President, Governmental and Public Affairs and Chief Compliance Officer, CMS Energy and Consumers Energy

Glenn P. Barba
Vice President, Controller and Chief Accounting Officer, CMS Energy and Consumers Energy



# SHAREOWNER INFORMATION

The most recent certifications by our chief executive and chief financial officers pursuant to Section 302 and Section 906 of the Sarbanes-Oxley Act of 2002, regarding the quality of our public disclosures, are filed as exhibits to our Form 10-K for 2010. Our chief executive officer’s most recent certification to the New York Stock Exchange, regarding compliance with the Exchange’s corporate governance listing standards, was submitted June 1, 2010.

## 2011 Annual Meeting

CMS Energy’s 2011 annual meeting is scheduled for 9 a.m. on May 20 at the company’s headquarters at One Energy Plaza, Jackson, Michigan. Proxy material will be mailed in April and will be available in the Investor Relations section of our Web site, www.cmsenergy.com.

## Stock Exchange Listing

CMS Energy Common Stock is traded on the New York Stock Exchange under the symbol CMS.

## Shareowner Information

Our services for shareowners are available in the Shareholder Services section of our Web site, www.cmsenergy.com. Financial reports, recent filings with the Securities and Exchange Commission and news releases also are available on the site.

Inquiries about stock ownership, stock purchase, change of address, dividend payments, dividend reinvestment and our stock purchase plan also may be directed to:

Investor Services Department
One Energy Plaza
Jackson, MI 49201-2276

Telephone: (517) 788-1868
Fax: (517)788-1859
E-mail: invest@cmsenergy.com

Financial and Operating Information
Investor Relations Department
One Energy Plaza
Jackson, MI 49201-2276

Telephone: (517) 788-2590

Transfer Agent, Registrar and Paying Agent
Investor Services Department
One Energy Plaza
Jackson, MI 49201-2276

## Stock Ownership

CMS Energy shareowners can choose either direct or indirect stock ownership. With direct stock ownership, shares are registered in your name; you can purchase additional shares directly from the company with no commission or service charge; you can enjoy the benefits of direct communication with us; and you can participate in the CMS Energy stock purchase plan. With indirect stock ownership, your shares are held in “street name” by a broker, and communications from the company come through your broker, rather than directly from us. If you are interested in direct ownership, please visit our Web site, www.cmsenergy.com/shareholder or contact Investor Services.

## Eliminate Duplicate Mailings

Shareowners who receive multiple copies of the annual report and proxy statement, due to multiple accounts at the same address, can request the elimination of duplicate documents. Shareowners of record should contact the Investor Services Department; other shareowners should contact their broker. Shareowners who want to receive these documents electronically instead of in print form should check the appropriate box on the proxy card they will receive in April, or they can contact Investor Services or their broker.



COMPARISON OF FIVE-YEAR CUMULATIVE TOTAL RETURN
AMONG CMS, S&P 500 INDEX, DOW JONES UTILITY INDEX AND
S&P 400 UTILITIES INDEX



CMS S&P 500 Dow Jones Utility S&P 400 Utilities

FIVE-YEAR CUMULATIVE TOTAL RETURN

<table><tr><td>COMPANY/INDEX</td><td>2005</td><td>2006</td><td>2007</td><td>2008</td><td>2009</td><td>2010</td></tr><tr><td>CMS</td><td>100</td><td>115</td><td>121</td><td>72</td><td>117</td><td>144</td></tr><tr><td>S&amp;P 500</td><td>100</td><td>116</td><td>122</td><td>77</td><td>97</td><td>112</td></tr><tr><td>DOW JONES UTILITY</td><td>100</td><td>117</td><td>140</td><td>101</td><td>114</td><td>121</td></tr><tr><td>S&amp;P 400 UTILITIES</td><td>100</td><td>122</td><td>130</td><td>104</td><td>126</td><td>144</td></tr></table>

These cumulative total returns assume reinvestment of dividends. The calculations also assume the value of the investment in CMS Common Stock and each index was $100 on December 31, 2005.



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# UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

☒

# ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2010

OR

□

## TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ___ to ___

Commission
File Number

Registrant; State of Incorporation; Address; and Telephone Number

IRS Employer
Identification No.

1-9513

CMS ENERGY CORPORATION
(A Michigan Corporation)
One Energy Plaza, Jackson, Michigan 49201
(517) 788-0550

38-2726431

1-5611

CONSUMERS ENERGY COMPANY
(A Michigan Corporation)
One Energy Plaza, Jackson, Michigan 49201
(517) 788-0550

38-0442310

Securities registered pursuant to Section 12(b) of the Act:

Registrant

Title of Class

Name of Each Exchange on Which Registered

CMS Energy Corporation

Common Stock, $0.1 par value

Consumers Energy Company
Preferred Stocks, $100 par value: $4.16 Series,
New York Stock Exchange

New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

CMS Energy Corporation: Yes ☒ No ☐ Consumers Energy Company: Yes ☒ No ☐

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.

CMS Energy Corporation: Yes ☐ No ☒ Consumers Energy Company: Yes ☐ No ☒

Indicate by check mark whether the Registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days.

CMS Energy Corporation: Yes ☒ No ☐ Consumers Energy Company: Yes ☒ No ☐

Indicate by check mark whether the Registrants have submitted electronically and posted on their corporate Web sites, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrants were required to submit and post such files).

CMS Energy Corporation: Yes ☒ No ☐ Consumers Energy Company: Yes ☒ No ☐

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of Registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. [ ]

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

CMS Energy Corporation: Large accelerated filer ☒ Accelerated filer ☐ Non-Accelerated filer ☐ Smaller reporting company ☐

Consumers Energy Company: Large accelerated filer ☐ Accelerated filer ☐ Non-Accelerated filer ☒ Smaller reporting company ☐

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

CMS Energy Corporation: Yes ☐ No ☒ Consumers Energy Company: Yes ☐ No ☒

The aggregate market value of CMS Energy voting and non-voting common equity held by non-affiliates was $3.326 billion for the 227,027,288 CMS Energy Common Stock shares outstanding on June 30, 2010 based on the closing sale price of $14.65 for CMS Energy Common Stock, as reported by the New York Stock Exchange on such date.

There were 252,140,618 shares of CMS Energy Common Stock outstanding on February 10, 2011. On February 24, 2011, CMS Energy held all voting and non-voting common equity of Consumers. Documents incorporated by reference in Part III: CMS Energy's proxy statement and Consumers' information statement relating to the 2011 annual meeting of stockholders to be held May 20, 2011.



## CMS Energy Corporation
Consumers Energy Company

## Annual Reports on Form 10-K to the Securities and Exchange Commission for the Year Ended December 31, 2010

## TABLE OF CONTENTS

Glossary ..... 3
Filing Format ..... 10
Forward-Looking Statements and Information ..... 10
PART I:
Item 1. Business ..... 14
Item 1A. Risk Factors ..... 32
Item 1B. Unresolved Staff Comments ..... 41
Item 2. Properties ..... 41
Item 3. Legal Proceedings ..... 41
Item 4. Removed and Reserved ..... 41
PART II:
Item 5. Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities ..... 42
Item 6. Selected Financial Data ..... 43
Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations ..... 43
Item 7A. Quantitative and Qualitative Disclosures About Market Risk ..... 43
Item 8. Financial Statements and Supplementary Data ..... 44
Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure ..... 174
Item 9A. Controls and Procedures ..... 174
Item 9B. Other Information ..... 175
PART III:
Item 10. Directors, Executive Officers and Corporate Governance ..... 176
Item 11. Executive Compensation ..... 177
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters ..... 177
Item 13. Certain Relationships and Related Transactions, and Director Independence ..... 177
Item 14. Principal Accountant Fees and Services ..... 177
PART IV:
Item 15. Exhibits and Financial Statement Schedules ..... 177



## GLOSSARY

Certain terms used in the text and financial statements are defined below.

2008 Energy Legislation ..... 2008 Energy Legislation
Comprehensive energy reform package enacted in October 2008 with the approval of Michigan Senate Bill 213 and Michigan House Bill 5524
ABATE ..... 2008 Energy Legislation
Association of Businesses Advocating Tariff Equity
ABO ..... 2008 Energy Legislation
Accumulated Benefit Obligation. The liabilities of a pension plan based on service and pay to date. This differs from the PBO that is typically disclosed in that it does not reflect expected future salary increases.
AFUDC ..... 2008 Energy Legislation
Allowance for borrowed and equity funds used during construction
AOCI ..... 2008 Energy Legislation
Accumulated Other Comprehensive Income (Loss)
ARO ..... 2008 Energy Legislation
Asset retirement obligation
ASU ..... 2008 Energy Legislation
FASB Accounting Standards Update
Bay Harbor ..... 2008 Energy Legislation
A residential/commercial real estate area located near Petoskey, Michigan. In 2002, CMS Energy sold its interest in Bay Harbor.
bcf ..... 2008 Energy Legislation
Billion cubic feet of gas
Big Rock ..... 2008 Energy Legislation
Big Rock Point nuclear power plant, formerly owned by Consumers
Btu ..... 2008 Energy Legislation
British thermal unit; one Btu equals the amount of energy required to raise the temperature of one pound of water by one degree Fahrenheit
CAIR ..... 2008 Energy Legislation
The Clean Air Interstate Rule
Cantera Gas Company ..... 2008 Energy Legislation
Cantera Gas Company LLC, a non-affiliated company
Cantera Natural Gas, Inc. ..... 2008 Energy Legislation
Cantera Natural Gas, Inc., a non-affiliated company that purchased CMS Field Services
CAO ..... 2008 Energy Legislation
Chief Accounting Officer
CATR ..... 2008 Energy Legislation
The Clean Air Transport Rule
CCB ..... 2008 Energy Legislation
Coal combustion by-product
CEO ..... 2008 Energy Legislation
Chief Executive Officer
CFO ..... 2008 Energy Legislation
Chief Financial Officer
C&HR Committees ..... 2008 Energy Legislation
The Compensation and Human Resources Committees of the Boards of Directors of CMS Energy and Consumers
City-gate contract ..... 2008 Energy Legislation
An arrangement made for the point at which a local distribution company physically receives gas from a supplier or pipeline
CKD ..... 2008 Energy Legislation
Cement kiln dust
Clean Air Act ..... 2008 Energy Legislation
Federal Clean Air Act, as amended
Clean Water Act ..... 2008 Energy Legislation
Federal Water Pollution Control Act
CMS Capital ..... 2008 Energy Legislation
CMS Capital, L.L.C., a wholly owned subsidiary of CMS Energy



CMS Electric & Gas ..... CMS Electric & Gas, L.L.C., a wholly owned subsidiary of CMS International Ventures
CMS Energy ..... CMS Energy Corporation, the parent of Consumers and CMS Enterprises
CMS Energy Brasil S.A. ..... CMS Energy Brasil S.A., a former wholly owned subsidiary of CMS Electric & Gas
CMS Enterprises ..... CMS Enterprises Company, a wholly owned subsidiary of CMS Energy
CMS ERM ..... CMS Energy Resource Management Company, formerly CMS MST, a wholly owned subsidiary of CMS Enterprises
CMS Field Services ..... CMS Field Services, Inc., a former wholly owned subsidiary of CMS Gas Transmission
CMS Gas Transmission ..... CMS Gas Transmission Company, a wholly owned subsidiary of CMS Enterprises
CMS Generation ..... CMS Generation Co., a former wholly owned subsidiary of CMS Enterprises
CMS Generation San Nicolas Company ..... CMS Generation San Nicolas Company, a company in which CMS Enterprises formerly owned a 0.1 percent interest
CMS International Ventures ..... CMS International Ventures LLC, a subsidiary of CMS Enterprises in which CMS Enterprises owns a 61.49 percent interest and CMS Gas Transmission owns a 37.01 percent interest
CMS Land ..... CMS Land Company, a wholly owned subsidiary of CMS Capital
CMS MST ..... CMS Marketing, Services and Trading Company, a wholly owned subsidiary of CMS Enterprises, whose name was changed to CMS ERM effective January 2004
CMS Oil and Gas ..... CMS Oil and Gas Company, a former wholly owned subsidiary of CMS Enterprises
CMS Viron ..... CMS Viron Corporation, a wholly owned subsidiary of CMS ERM
Consumers ..... Consumers Energy Company, a wholly owned subsidiary of CMS Energy
Consumers Funding ..... Consumers Funding LLC, a wholly owned consolidated bankruptcy-remote subsidiary of Consumers and special-purpose entity organized for the sole purpose of purchasing and owning Securitization property, assuming Securitization bonds, and pledging its interest in Securitization property to a trustee to collateralize the Securitization bonds
Customer Choice Act ..... Customer Choice and Electricity Reliability Act, a Michigan statute
D.C. ..... District of Columbia
DCCP ..... Defined Company Contribution Plan
DC SERP ..... Defined Contribution SERP
Detroit Edison ..... The Detroit Edison Company, a non-affiliated company



DIG ..... Dearborn Industrial Generation, L.L.C., a wholly owned subsidiary of Dearborn Industrial Energy, L.L.C., a wholly owned subsidiary of CMS Energy
Dodd-Frank Act ..... Dodd-Frank Wall Street Reform and Consumer Protection Act, enacted in July 2010
DOE ..... U.S. Department of Energy
DOJ ..... U.S. Department of Justice
EBITDA ..... Earnings Before Interest, Taxes, Depreciation, and Amortization
EISP ..... Executive Incentive Separation Plan
EnerBank ..... EnerBank USA, a wholly owned subsidiary of CMS Capital
Entergy ..... Entergy Corporation, a non-affiliated company
EPA ..... U.S. Environmental Protection Agency
EPS ..... Earnings per share
Exchange Act ..... Securities Exchange Act of 1934, as amended
Exeter ..... Exeter Energy Limited Partnership, a limited partnership owned directly and indirectly by HYDRA-CO
FASB ..... Financial Accounting Standards Board
FDIC ..... Federal Deposit Insurance Corporation
FERC ..... The Federal Energy Regulatory Commission
First Mortgage Bond Indenture ..... The indenture dated as of September 1, 1945 between Consumers and The Bank of New York Mellon, as Trustee, as amended and supplemented
FLI Liquidating Trust ..... Trust formed in Missouri bankruptcy court to accomplish the liquidation of Farmland Industries, Inc., a non-affiliated entity
FMB ..... First mortgage bond
FOV ..... Finding of Violation
GAAP ..... U.S. Generally Accepted Accounting Principles
GasAtacama ..... GasAtacama Holding Limited, a limited liability partnership that manages GasAtacama S.A., which includes Atacama Finance Company, an integrated natural gas pipeline and electric generating plant in Argentina and Chile, in which CMS International Ventures formerly owned a 50 percent interest
GCC ..... Gas Customer Choice, which allows gas customers to purchase gas from alternative suppliers
GCR ..... Gas cost recovery
Genesee ..... Genesee Power Station Limited Partnership, a VIE in which HYDRA-CO has a 50 percent interest
Grayling ..... Grayling Generating Station Limited Partnership, a VIE in which HYDRA-CO has a 50 percent interest



Health Care Acts ..... Comprehensive health care reform enacted in March 2010, comprising the Patient Protection and Affordable Care Act and the related Health Care and Education Reconciliation Act
HYDRA-CO ..... HYDRA-CO Enterprises, Inc., a wholly owned subsidiary of CMS Enterprises
IPP ..... Independent power producer or independent power production
IRS ..... Internal Revenue Service
ISFSI ..... Independent spent fuel storage installation
kilovolts ..... Thousand volts (unit used to measure the difference in electrical pressure along a current)
kVA ..... Thousand volt-amperes (unit used to reflect the electrical power capacity rating of equipment or a system)
kWh ..... Kilowatt-hour (a unit of energy equal to one thousand watt-hours)
LIBOR ..... The London Interbank Offered Rate
Lucid Energy ..... Lucid Energy LLC, a non-affiliated company
Ludington ..... Ludington pumped storage plant, jointly owned by Consumers and Detroit Edison
Marathon ..... Marathon Oil Company, Marathon E.G. Holding, Marathon E.G. Alba, Marathon E.G. LPG, Marathon Production LTD, and Alba Associates, LLC, each a non-affiliated company
MCV Facility ..... A 1,500 MW natural gas-fueled, combined-cycle cogeneration facility operated by the MCV Partnership
MCV Partnership ..... Midland Cogeneration Venture Limited Partnership
MCV PPA ..... The PPA between Consumers and the MCV Partnership, with a 35-year term commencing in March 1990, as amended and restated in an agreement dated as of June 9, 2008 between Consumers and the MCV Partnership
MD&A ..... Management's Discussion and Analysis
MDL ..... A pending multi-district litigation case in Nevada
MDNRE ..... Michigan Department of Natural Resources and Environment, which, effective January 17, 2010, is the successor to the Michigan Department of Environmental Quality and the Michigan Department of Natural Resources
MEI ..... Michigan Energy Investments LLC, an affiliate of Lucid Energy and a non-affiliated company
METC ..... Michigan Electric Transmission Company, LLC, a non-affiliated company
MGP ..... Manufactured gas plant
Midwest Energy Market ..... An energy market developed by the MISO to provide day-ahead and real-time market information and centralized dispatch for market participants
MISO ..... The Midwest Independent Transmission System Operator, Inc.



MPSC. Michigan Public Service Commission
MRV. Market-Related Value of Plan assets
MW. Megawatt (a unit of power equal to one million watts)
MWh. Megawatt-hour (a unit of energy equal to one million watt-hours)
NAV. Net asset value
NERC. The North American Electric Reliability Corporation, a non-affiliated company
NOMECO. CMS NOMECO Oil & Gas Co., a former wholly owned subsidiary of CMS Enterprises
NOV. Notice of Violation
NPDES. National Pollutant Discharge Elimination System
NREPA. Part 201 of Michigan Natural Resources and Environmental Protection Act, a statute that covers environmental activities including remediation
NSR. New Source Review, a construction-permitting program under the Clean Air Act
NYMEX. The New York Mercantile Exchange
OPEB. Postretirement benefit plans other than pensions
Palisades. Palisades nuclear power plant, sold by Consumers to Entergy in 2007
Panhandle. Panhandle Eastern Pipe Line Company, including its wholly owned subsidiaries Trunkline, Pan Gas Storage Company, Panhandle Storage Company, and Panhandle Holding Company, a former wholly owned subsidiary of CMS Gas Transmission
PBO. Projected benefit obligation
PCB. Polychlorinated biphenyl
Pension Plan. Trusteed, non-contributory, defined benefit pension plan of CMS Energy, Consumers, and Panhandle
PISP. Performance Incentive Stock Plan
PPA. Power purchase agreement
PSCR. Power supply cost recovery
PSD. Prevention of Significant Deterioration
PURPA. Public Utility Regulatory Policies Act of 1978
RCP. Resource Conservation Plan
REC. Renewable energy credit established under the 2008 Energy Legislation
ReEnergy. ReEnergy Sterling LLC, a non-affiliated company
RMRR. Routine maintenance, repair, and replacement



ROA..... Retail Open Access, which allows electric generation customers to choose alternative electric suppliers pursuant to the Customer Choice Act

S&P..... Standard and Poor's Financial Services LLC, which includes Standard and Poor's Ratings Services

SEC..... U.S. Securities and Exchange Commission

Securitization..... A financing method authorized by statute and approved by the MPSC which allows a utility to sell its right to receive a portion of the rate payments received from its customers for the repayment of securitization bonds issued by a special-purpose entity affiliated with such utility

SENECA..... Sistema Electrico del Estado Nueva Esparta C.A., a former wholly owned subsidiary of CMS International Ventures

SERP..... Supplemental Executive Retirement Plan

SFAS..... Statement of Financial Accounting Standards

Sherman Act..... Sherman Antitrust Act, enacted in 1890

Stranded costs..... Costs incurred by utilities in order to serve their customers in a regulated monopoly environment, which may not be recoverable in a competitive environment because of customers leaving their systems and ceasing to pay for their costs. These costs could include owned and purchased generation and regulatory assets.

Superfund..... Comprehensive Environmental Response, Compensation and Liability Act

Supplemental Environmental Projects..... Environmentally beneficial projects that a party agrees to undertake as part of the settlement of an enforcement action, but which the party is not otherwise legally required to perform

TAQA..... Abu Dhabi National Energy Company, a subsidiary of Abu Dhabi Water and Electricity Authority, a non-affiliated company

Terminal Rental Adjustment Clause..... A provision of a leasing agreement which permits or requires the rental price to be adjusted upward or downward by reference to the amount realized by the lessor under the agreement upon sale or other disposition of formerly leased property

T.E.S. Filer City..... T.E.S. Filer City Station Limited Partnership, a VIE in which HYDRA-CO has a 50 percent interest

TGN..... A natural gas transportation and pipeline business located in Argentina, in which CMS Gas Transmission formerly owned a 23.54 percent interest

Title V..... A federal program under the Clean Air Act designed to standardize air quality permits and the permitting process for major sources of emissions across the U.S.

Trunkline..... Trunkline Gas Company, LLC, a former wholly owned subsidiary of CMS Panhandle Holding, LLC



Trust Preferred Securities..... Securities representing an undivided beneficial interest in the assets of statutory business trusts, the interests of which have a preference with respect to certain trust distributions over the interests of either CMS Energy or Consumers, as applicable, as owner of the common beneficial interests of the trusts
TSR..... Total shareholder return
TSU..... Texas Southern University, a non-affiliated entity
Union..... Utility Workers Union of America, AFL-CIO
U.S..... United States
VEBA..... Voluntary employees' beneficiary association trusts accounts established specifically to set aside employer-contributed assets to pay for future expenses of the OPEB plan
VIE..... Variable interest entity
Wolverine..... Wolverine Power Supply Cooperative, Inc., a non-affiliated company
XBRL..... eXtensible Business Reporting Language
Zeeland..... A 935 MW gas-fueled power plant located in Zeeland, Michigan



## FILING FORMAT

This combined Form 10-K is separately filed by CMS Energy and Consumers. Information in this combined Form 10-K relating to each individual registrant is filed by such registrant on its own behalf. Consumers makes no representation regarding information relating to any other companies affiliated with CMS Energy other than its own subsidiaries. None of CMS Energy, CMS Enterprises, nor any of CMS Energy’s other subsidiaries (other than Consumers) has any obligation in respect of Consumers’ debt securities and holders of such debt securities should not consider the financial resources or results of operations of CMS Energy, CMS Enterprises, nor any of CMS Energy’s other subsidiaries (other than Consumers and its own subsidiaries (in relevant circumstances)) in making a decision with respect to Consumers’ debt securities. Similarly, none of Consumers nor any other subsidiary of CMS Energy has any obligation in respect of debt securities of CMS Energy.

## FORWARD-LOOKING STATEMENTS AND INFORMATION

This Form 10-K and other written and oral statements that CMS Energy and Consumers make may contain forward-looking statements as defined by the Private Securities Litigation Reform Act of 1995. The use of “might,” “may,” “could,” “should,” “anticipates,” “believes,” “estimates,” “expects,” “intends,” “plans,” “projects,” “forecasts,” “predicts,” “assumes,” and other similar words is intended to identify forward-looking statements that involve risk and uncertainty. This discussion of potential risks and uncertainties is designed to highlight important factors that may impact CMS Energy’s and Consumers’ businesses and financial outlook. CMS Energy and Consumers have no obligation to update or revise forward-looking statements regardless of whether new information, future events, or any other factors affect the information contained in the statements. These forward-looking statements are subject to various factors that could cause CMS Energy’s and Consumers’ actual results to differ materially from the results anticipated in these statements. These factors include CMS Energy’s and Consumers’ inability to predict or control the following, all of which are potentially significant:

- the price of CMS Energy common stock, capital and financial market conditions, and the effect of these market conditions on CMS Energy’s and Consumers’ postretirement benefit plans, interest costs, and access to the capital markets, including availability of financing (including Consumers’ accounts receivable sales program and CMS Energy’s and Consumers’ revolving credit facilities) to CMS Energy, Consumers, or any of their affiliates, and the energy industry;

- the impact of the economy, particularly in Michigan, and potential future volatility in the financial and credit markets on CMS Energy’s, Consumers’, or any of their affiliates’:

• revenues;

• capital expenditure programs and related earnings growth;

• ability to collect accounts receivable from customers;

• cost of capital and availability of capital; and

• Pension Plan and postretirement benefit plans assets and required contributions;

- changes in the economic and financial viability of CMS Energy’s and Consumers’ suppliers, customers, and other counterparties and the continued ability of these third parties, including third parties in bankruptcy, to meet their obligations to CMS Energy and Consumers;

• population decline in the geographic areas where CMS Energy and Consumers conduct business;

• national, regional, and local economic, competitive, and regulatory policies, conditions, and developments;

- changes in applicable laws, rules, regulations, principles or practices, or in their interpretation, including those related to taxes, the environment, and accounting matters, that could have an impact on CMS Energy’s



and Consumers’ businesses or financial results, including the impact of any future regulations or lawsuits regarding:

• carbon dioxide and other greenhouse gas emissions, including potential future legislation to establish a cap and trade system;

• criteria pollutants, such as nitrogen oxide, sulfur dioxide, and particulate, and hazardous air pollutants, including impacts of the CAIR and CATR;

• CCBs;

• PCBs;

• cooling water intake or discharge from power plants or other industrial equipment;

• limitations on the use or construction of coal-fueled electric power plants;

• nuclear-related regulation;

• renewable portfolio standards and energy efficiency mandates;

• energy-related derivatives and hedges under the Dodd-Frank Act; and

• any other potential legislative changes, including changes to the ten-percent ROA limit;

• potentially adverse regulatory or legal interpretations or decisions, including those related to environmental laws and regulations, and potential environmental remediation costs associated with these interpretations or decisions, including those that may affect Bay Harbor or Consumers’ RMRR classification under NSR regulations;

• potentially adverse or delayed regulatory treatment or permitting decisions concerning significant matters affecting CMS Energy or Consumers that are presently or soon to be before the MDNRE and/or EPA, including Bay Harbor;

• potentially adverse regulatory treatment or failure to receive timely regulatory orders concerning a number of significant matters affecting Consumers that are presently or potentially before the MPSC, including:

• sufficient and timely recovery of:

• environmental and safety-related expenditures for coal-fueled plants and other utility properties;

• power supply and natural gas supply costs;

• operating and maintenance expenses;

• additional utility rate-based investments;

• costs associated with the proposed retirement and decommissioning of facilities;

• development costs of the proposed coal-fueled plant;

• MISO energy and transmission costs; and

• costs associated with energy efficiency investments and state or federally mandated renewable resource standards;

• actions of regulators with respect to expenditures subject to tracking mechanisms;

• actions of regulators to prevent or curtail shutoffs for non-paying customers;

• actions of regulators with respect to Consumers’ pilot electric and gas decoupling mechanisms;

• regulatory orders preventing or curtailing rights to self-implement rate requests;



• regulatory orders potentially requiring a refund of previously self-implemented rates; and

• implementation of new energy legislation or revisions of existing regulations;

• potentially adverse regulatory treatment resulting from pressure on regulators to oppose annual rate increases or to lessen rate impacts upon customers, particularly in difficult economic times;

• loss of customer demand for electric generation supply to alternative energy suppliers;

• the ability of Consumers to recover its regulatory assets in full and in a timely manner;

• the effectiveness of the electric and gas decoupling mechanisms in moderating the impact of sales variability on net revenues;

• the ability of Consumers to recover nuclear fuel storage costs incurred as a result of the DOE’s failure to accept spent nuclear fuel on schedule or at all, and the outcome of pending litigation with the DOE;

• the impact of enforcement powers and investigation activities at FERC;

• federal regulation of electric sales and transmission of electricity, including periodic re-examination by federal regulators of CMS Energy’s and Consumers’ market-based sales authorizations in wholesale power markets without price restrictions;

• effects of weather conditions, such as unseasonably warm weather during the winter, on sales;

• the market perception of the energy industry or of CMS Energy, Consumers, or any of their affiliates;

• the credit ratings of CMS Energy or Consumers;

• the impact of credit markets, economic conditions, and any new banking regulations on EnerBank;

• potential effects of the Dodd-Frank Act and related regulations on CMS Energy and Consumers, including regulation of financial institutions such as EnerBank, and shareholder activity that is permitted or may be permitted under the Act;

• disruptions in the normal commercial insurance and surety bond markets that may increase costs or reduce traditional insurance coverage, particularly terrorism and sabotage insurance, performance bonds, and tax-exempt debt insurance, and stability of insurance providers, and the ability of Consumers to recover the costs of any such insurance from customers;

• energy markets, including availability of capacity and the timing and extent of changes in commodity prices for oil, coal, natural gas, natural gas liquids, electricity, and certain related products due to lower or higher demand, shortages, transportation problems, or other developments, and their impact on CMS Energy’s and Consumers’ cash flows and working capital;

- the effectiveness of CMS Energy’s and Consumers’ risk management policies, procedures, and strategies, including their strategies to hedge risk related to future prices of electricity, natural gas, and other energy-related commodities;

• changes in construction material prices and the availability of qualified construction personnel to implement Consumers’ construction program;

• factors affecting development of generation projects and distribution infrastructure replacement and expansion projects, including those related to project site identification, construction, permitting, and government approvals;

• costs and availability of personnel, equipment, and materials for operating and maintaining existing facilities;

• factors affecting operations, such as unusual weather conditions, catastrophic weather-related damage, unscheduled generation outages, maintenance or repairs, environmental incidents, or electric transmission and distribution or gas pipeline system constraints;



• potential disruption or interruption of facilities or operations due to accidents, war, or terrorism, and the ability to obtain or maintain insurance coverage for these events;

- the impact of an accident, explosion, or other physical disaster involving Consumers’ high- or low-pressure gas pipelines, gas storage fields, overhead or underground electrical lines, or other utility infrastructure;

• CMS Energy’s and Consumers’ ability to achieve generation planning goals and the occurrence and duration of scheduled or unscheduled generation or gas compression outages;

• technological developments in energy production, delivery, usage, and storage;

• achievement of capital expenditure and operating expense goals, including the 2011 capital expenditures forecast;

• the impact of CMS Energy’s and Consumers’ integrated business software system on their operations, including utility customer billing and collections;

• potential effects of the Health Care Acts on existing or future health care costs;

• adverse outcomes regarding tax positions;

• adverse consequences resulting from any past or future assertion of indemnity or warranty claims associated with assets and businesses previously owned by CMS Energy or Consumers, including claims resulting from attempts by foreign or domestic governments to assess taxes on past operations or transactions;

• the outcome, cost, and other effects of legal or administrative proceedings, settlements, investigations, or claims;

• earnings volatility resulting from the application of fair value accounting to certain energy commodity contracts, such as electricity sales agreements and interest rate and foreign currency contracts;

• changes in financial or regulatory accounting principles or policies;

• a possible future requirement to comply with International Financial Reporting Standards, which differ from GAAP in various ways, including the present lack of special accounting treatment for regulated activities; and

• other business or investment matters that may be disclosed from time to time in CMS Energy’s and Consumers’ SEC filings, or in other publicly issued documents.

For additional details regarding these and other uncertainties, see Item 1A. Risk Factors; the “Outlook” section included in MD&A; Note 5, Contingencies and Commitments; and Note 6, Regulatory Matters.



## GENERAL

## CMS Energy

CMS Energy was formed in Michigan in 1987 and is an energy company operating primarily in Michigan. It is the parent holding company of several subsidiaries, including Consumers, an electric and gas utility, and CMS Enterprises, primarily a domestic IPP. Consumers serve individuals and businesses operating in the alternative energy, automotive, chemical, metal, and food products industries, as well as a diversified group of other industries. CMS Enterprises, through its subsidiaries and equity investments, is engaged primarily in IPP and owns power generation facilities fueled mostly by natural gas and biomass.

CMS Energy manages its businesses by the nature of services each provides and operates, principally in three business segments: electric utility, gas utility, and enterprises, its non-utility operations and investments. Consumers’ consolidated operations account for substantially all of CMS Energy’s total assets, income, and operating revenue. CMS Energy’s consolidated operating revenue was $6.4 billion in 2010, $6.2 billion in 2009, and $6.8 billion in 2008.

For further information about operating revenue, net operating income, and identifiable assets and liabilities attributable to all of CMS Energy’s business segments and operations, see Item 8. Financial Statements and Supplementary Data, CMS Energy’s Selected Financial Information, Consolidated Financial Statements, and Notes to Consolidated Financial Statements.

## Consumers

Consumers has served Michigan customers since 1886. Consumers was incorporated in Maine in 1910 and became a Michigan corporation in 1968. Consumers owns and operates electric distribution and generation facilities and gas transmission, storage, and distribution facilities. It provides electricity and/or natural gas to 6.8 million of Michigan’s 10 million residents. Consumers’ rates and certain other aspects of its business are subject to the jurisdiction of the MPSC and FERC, as described in “CMS Energy and Consumers Regulation” in this Item 1.

Consumers’ consolidated operating revenue was $6.2 billion in 2010, $6.0 billion in 2009, and $6.4 billion in 2008. For further information about operating revenue, net operating income, and identifiable assets and liabilities attributable to Consumers’ electric and gas utility operations, see Item 8. Financial Statements and Supplementary Data, Consumers’ Selected Financial Information, Consolidated Financial Statements, and Notes to Consolidated Financial Statements.

Consumers owns its principal properties in fee, except that most electric lines and gas mains are located below public roads or on land owned by others and are accessed by Consumers through easements and other rights. Almost all of Consumers’ properties are subject to the lien of its First Mortgage Bond Indenture. For additional information on Consumers’ properties, see Consumers Electric Utility — Electric Utility Properties and Consumers Gas Utility — Gas Utility Properties in the “Business Segments” section of this Item 1.



In 2010, Consumers served 1.8 million electric customers and 1.7 million gas customers in Michigan’s Lower Peninsula. Presented in the following map is Consumers’ service territory:



Gas Service Territory

■ Electric Service Territory

■ Gas and Electric Service Territory



## BUSINESS SEGMENTS

## Consumers Electric Utility

Electric Utility Operations: Consumers’ electric utility operations, which include the generation, purchase, distribution, and sale of electricity, generated operating revenue of $3.8 billion in 2010, $3.4 billion in 2009, and $3.6 billion in 2008. Consumers’ electric utility customer base consists of a mix of residential, commercial, and diversified industrial customers in Michigan’s Lower Peninsula. The automotive industry represented six percent of Consumers’ 2010 electric utility operating revenue. Presented in the following illustration is Consumers’ 2010 electric utility operating revenue of $3.8 billion by customer class:



Consumers’ electric utility operations are not dependent on a single customer, or even a few customers, and the loss of any one or even a few of its largest customers is not reasonably likely to have a material adverse effect on Consumers’ financial condition.

In 2010, Consumers’ electric deliveries, excluding intersystem deliveries, were 38 million MWh, which included ROA deliveries of four million MWh, consistent with the ten-percent cap. Net bundled sales were 34 million MWh in 2010. In 2009, Consumers’ electric deliveries, excluding intersystem deliveries, were 36 million MWh, which included ROA deliveries of two million MWh, resulting in net bundled sales of 34 million MWh.

Consumers’ electric utility operations are seasonal. The consumption of electric energy typically increases in the summer months, due primarily to the use of air conditioners and other cooling equipment.



Presented in the following illustration are Consumers’ monthly weather-adjusted electric deliveries (deliveries adjusted to reflect normal weather conditions) to its customers, including ROA deliveries, during 2010 and 2009:



Consumers’ 2010 summer peak demand was 8,190 MW, which includes ROA demand of 555 MW. For the 2009-2010 winter period, Consumers’ peak demand was 6,093 MW, which includes ROA demand of 425 MW. As required by MISO reserve margin requirements, Consumers owns or controls, through long-term contracts, capacity necessary to supply its projected firm peak load and necessary reserve margin for summer 2011.



Electric Utility Properties: At December 31, 2010, Consumers' electric generating system consisted of the following:

<table><tr><td>Name and Location (Michigan)</td><td>Number of Units and Year Entered Service</td><td>2010 Summer Net Demonstrated Capability(a) (MW)</td><td>2010 Net Generation (GWh)</td></tr><tr><td>Coal Generation</td><td></td><td></td><td></td></tr><tr><td>J. H. Campbell 1 &amp; 2 — West Olive</td><td>2 Units, 1962-1967</td><td>615</td><td>4,015</td></tr><tr><td>J. H. Campbell 3 — West Olive(b)</td><td>1 Unit, 1980</td><td>770</td><td>5,419</td></tr><tr><td>B. C. Cobb — Muskegon</td><td>2 Units, 1956-1957</td><td>310</td><td>1,932</td></tr><tr><td>D. E. Karn — Essexville</td><td>2 Units, 1959-1961</td><td>515</td><td>2,810</td></tr><tr><td>J. C. Weadock — Essexville</td><td>2 Units, 1955-1958</td><td>290</td><td>1,739</td></tr><tr><td>J. R. Whiting — Erie</td><td>3 Units, 1952-1953</td><td>328</td><td>1,964</td></tr><tr><td>Total coal generation</td><td></td><td>2,828</td><td>17,879</td></tr><tr><td>Oil/Gas Generation</td><td></td><td></td><td></td></tr><tr><td>B. C. Cobb — Muskegon</td><td>3 Units, 1999-2000(c)</td><td>—</td><td>—</td></tr><tr><td>D. E. Karn — Essexville</td><td>2 Units, 1975-1977</td><td>1,276</td><td>99</td></tr><tr><td>Zeeland — Zeeland</td><td>1 Unit, 2002</td><td>538</td><td>720</td></tr><tr><td>Total oil/gas generation</td><td></td><td>1,814</td><td>819</td></tr><tr><td>Hydroelectric</td><td></td><td></td><td></td></tr><tr><td>Conventional hydro generation</td><td>13 Plants, 1906-1949</td><td>74</td><td>365</td></tr><tr><td>Ludington — Ludington</td><td>6 Units, 1973</td><td>955(d)</td><td>(366)(e)</td></tr><tr><td>Total hydroelectric</td><td></td><td>1,029</td><td>(1)</td></tr><tr><td>Gas/Oil Combustion Turbine</td><td></td><td></td><td></td></tr><tr><td>Various plants</td><td>7 Plants, 1966-1971</td><td>187</td><td>10</td></tr><tr><td>Zeeland — Zeeland</td><td>2 Units, 2001</td><td>330</td><td>235</td></tr><tr><td>Total gas/oil combustion turbine</td><td></td><td>517</td><td>245</td></tr><tr><td>Total owned generation</td><td></td><td>6,188</td><td>18,942</td></tr><tr><td>Purchased and Interchange Power(f)</td><td></td><td>3,058(g)</td><td>18,048(h)</td></tr><tr><td>Total Supply</td><td></td><td>9,246</td><td>36,990</td></tr><tr><td>Generation and transmission use/loss</td><td></td><td></td><td>(3,373)</td></tr><tr><td>Total Net Bundled Sales</td><td></td><td></td><td>33,617</td></tr></table>

(a) Represents each plant’s electric generating capacity during the critical summer months.

(b) Represents Consumers’ share of the capacity of the J. H. Campbell 3 unit, net of the 6.69 percent ownership interest of the Michigan Public Power Agency and Wolverine.

(c) B. C. Cobb 1-3 are retired coal-fueled units that were converted to gas-fueled units. B. C. Cobb 1-3 were placed back into service in the years indicated, and subsequently taken out of service beginning in April 2009. Consumers plans to reevaluate the status of B. C. Cobb 1-3 in 2011 and may return the units to service in 2012.

(d) Represents Consumers’ 51 percent share of the capacity of Ludington. Detroit Edison owns the remaining 49 percent.

(e) Represents Consumers’ share of net pumped-storage generation. The pumped-storage facility consumes electricity to pump water during off-peak hours for storage in order to generate electricity later during peak-demand hours.

(f) Includes purchases from the Midwest Energy Market, long-term purchase contracts, and seasonal purchases.

(g) Includes 1,240 MW of purchased contract capacity from the MCV Facility and 778 MW of purchased contract capacity from Palisades.

(h) Includes 2,456 GWh of purchased energy from the MCV Facility and 6,241 GWh of purchased energy from Palisades.



Consumers’ distribution system includes:

• 413 miles of high-voltage distribution radial lines operating at 120 kilovolts or above;

• 4,244 miles of high-voltage distribution overhead lines operating at 23 kilovolts and 46 kilovolts;

• 17 miles of high-voltage distribution underground lines operating at 23 kilovolts and 46 kilovolts;

• 55,933 miles of electric distribution overhead lines;

• 10,058 miles of underground distribution lines; and

• substations with an aggregate transformer capacity of 24 million kVA.

Consumers is interconnected to the interstate high-voltage electric transmission system owned by METC and operated by MISO, to neighboring utilities, and to other transmission systems.

Generation and Power Purchase Capacity by Fuel Type: As shown in the following illustration, Consumers’ 2010 generation capacity of 9,246 MW, including capacity of 3,058 MW purchased under PPAs, relied on a variety of fuel sources:



Renewable generation capacity includes wind generation resources assumed to provide capacity at eight percent of nameplate rating.



Consumers’ Electric Generating System Power Generation: Consumers generated power from the following sources:

<table><tr><td rowspan="2">Power Generated</td><td colspan="5">GWh</td></tr><tr><td>2010</td><td>2009</td><td>2008</td><td>2007</td><td>2006</td></tr><tr><td>Coal</td><td>17,879</td><td>17,255</td><td>17,701</td><td>17,903</td><td>17,744</td></tr><tr><td>Gas</td><td>1,043</td><td>565</td><td>804</td><td>129</td><td>161</td></tr><tr><td>Hydro(a)</td><td>365</td><td>466</td><td>454</td><td>416</td><td>485</td></tr><tr><td>Oil</td><td>21</td><td>14</td><td>41</td><td>112</td><td>48</td></tr><tr><td>Nuclear</td><td>—</td><td>—</td><td>—</td><td>1,781</td><td>5,904</td></tr><tr><td>Net pumped storage(b)</td><td>(366)</td><td>(303)</td><td>(382)</td><td>(478)</td><td>(426)</td></tr><tr><td>Total owned generation</td><td>18,942</td><td>17,997</td><td>18,618</td><td>19,863</td><td>23,916</td></tr><tr><td>Purchased renewable energy(c)</td><td>1,582</td><td>1,472</td><td>1,503</td><td>1,480</td><td>1,529</td></tr><tr><td>Purchased generation-other(c)</td><td>10,421</td><td>10,066</td><td>12,140</td><td>11,022</td><td>7,065</td></tr><tr><td>Net interchange power(d)</td><td>6,045</td><td>6,925</td><td>6,653</td><td>8,009</td><td>7,244</td></tr><tr><td>Net purchased and interchange power</td><td>18,048</td><td>18,463</td><td>20,296</td><td>20,511</td><td>15,838</td></tr><tr><td>Total Net Power Supply</td><td>36,990</td><td>36,460</td><td>38,914</td><td>40,374</td><td>39,754</td></tr></table>

(a) Represents Consumers’ owned renewable generation.

(b) Represents Consumers’ share of net pumped-storage generation. The pumped-storage facility consumes electricity to pump water during off-peak hours for storage in order to generate electricity later during peak-demand hours.

(c) Includes purchases from long-term purchase contracts.

(d) Includes purchases from the Midwest Energy Market and seasonal purchases.

The cost of all fuels consumed, shown in the following table, fluctuates with the mix of fuel used.

<table><tr><td rowspan="2">Fuel Consumed</td><td colspan="5">Cost per Million Btu</td></tr><tr><td>2010</td><td>2009</td><td>2008</td><td>2007</td><td>2006</td></tr><tr><td>Coal</td><td>$ 2.51</td><td>$2.37</td><td>$ 2.01</td><td>$ 2.04</td><td>$2.09</td></tr><tr><td>Gas</td><td>5.57</td><td>6.57</td><td>10.94</td><td>10.29</td><td>8.92</td></tr><tr><td>Oil</td><td>10.98</td><td>9.59</td><td>11.54</td><td>8.21</td><td>8.68</td></tr><tr><td>Nuclear</td><td>—</td><td>—</td><td>—</td><td>0.42</td><td>0.24</td></tr><tr><td>All Fuels(a)</td><td>$ 2.71</td><td>$2.56</td><td>$ 2.47</td><td>$ 2.07</td><td>$1.72</td></tr></table>

## (a) Weighted-average fuel costs

In 2010, Consumers’ four coal-fueled generating sites burned 10 million tons of coal and produced a combined total of 17,879 GWh of electricity, which represented 48 percent of the energy provided by Consumers to meet customer demand.

In order to obtain its coal requirements, Consumers enters into physical coal supply contracts. At December 31, 2010, Consumers had contracts to purchase coal through 2013; these contracts total $315 million. All of Consumers' coal supply contracts have fixed prices. At December 31, 2010, Consumers had 85 percent of its 2011 expected coal requirements under contract, as well as a 41-day supply of coal on hand.

In conjunction with its coal supply contracts, Consumers leases a fleet of rail cars and has long-term transportation contracts with various companies to provide rail and vessel services for delivery of purchased coal to Consumers’ generating facilities. Consumers’ coal transportation contracts expire from 2011 through 2014; these contracts total $445 million.



Consumers participates in the Midwest Energy Market. Consumers offers its generation into the market on a day-ahead and real-time basis and bids for power in the market to serve the demand of its customers. Consumers is a net purchaser of power and supplements its generation capability with purchases from the market to meet its customers' needs during peak demand periods.

At December 31, 2010, Consumers had unrecognized future commitments (amounts for which liabilities, in accordance with GAAP, have not been recorded on its balance sheet) to purchase capacity and energy under long-term PPAs with various generating plants. These contracts require monthly capacity payments based on the plants' availability or deliverability. These payments for 2011 through 2030 total $15.3 billion and range from $822 million to $1 billion annually for each of the next five years. These amounts may vary depending on plant availability and fuel costs. For further information about Consumers' future capacity and energy purchase obligations, see Item 7. MD&A, "Capital Resources and Liquidity."

## Consumers Gas Utility

## Gas Utility Operations:

Consumers’ gas utility operations, which include the purchase, transmission, storage, distribution, and sale of natural gas, generated operating revenue of $2.4 billion in 2010, $2.6 billion in 2009, and $2.8 billion in 2008. Consumers’ gas utility customer base consists of a mix of residential, commercial, and diversified industrial customers in Michigan’s Lower Peninsula. Presented in the following illustration is Consumers’ 2010 gas utility operating revenue by customer class:



Consumers’ gas utility operations are not dependent on a single customer, or even a few customers, and the loss of any one or even a few of its largest customers is not reasonably likely to have a material adverse effect on Consumers’ financial condition.

In 2010, deliveries of natural gas, including off-system transportation deliveries, through Consumers’ pipeline and distribution network totaled 317 bcf, which included GCC deliveries of 36 bcf. In 2009, deliveries of natural gas, including off-system transportation deliveries, through Consumers’ pipeline and distribution network totaled 319 bcf, which included GCC deliveries of 27 bcf. Consumers’ gas utility operations are seasonal. Consumers injects natural gas into storage during the summer months for use during the winter months when the demand for natural gas is higher. Peak demand occurs in the winter due to colder temperatures and the resulting use of natural gas as a heating fuel. During 2010, 46 percent of the natural gas supplied to all customers during the winter months



was supplied from storage. Presented in the following illustration are Consumers' monthly weather-adjusted gas deliveries to its customers, including GCC deliveries, during 2010 and 2009:



Gas Utility Properties: Consumers’ gas distribution and transmission system located in Michigan’s Lower Peninsula consists of:

• 26,585 miles of distribution mains;

• 1,664 miles of transmission lines;

• seven compressor stations with a total of 150,475 installed and available horsepower; and

• 15 gas storage fields with an aggregate storage capacity of 307 bcf and a working storage capacity of 142 bcf.

Gas Supply: In 2010, Consumers purchased 61 percent of the gas it delivered from U.S. producers and 21 percent from Canadian producers. The remaining 18 percent was purchased from authorized GCC suppliers and



delivered by Consumers to customers in the GCC program. Presented in the following illustration are the supply arrangements for the gas Consumers delivered to GCC and GCR customers during 2010:



Firm transportation or firm city-gate contracts are those that define a fixed amount, price, and delivery time frame. Consumers’ firm gas transportation contracts are with ANR Pipeline Company, Great Lakes Gas Transmission, L.P., Panhandle, Trunkline, and Vector Pipeline L.P. Under these contracts, Consumers purchases and transports gas to Michigan for ultimate delivery to its customers. Consumers’ firm gas transportation contracts expire through 2017 and provide for the delivery of 71 percent of Consumers’ total gas supply requirements.

Consumers purchases the balance of its required gas supply under firm city-gate contracts and through authorized suppliers under the GCC program. Consumers may also utilize incremental firm transportation contracts and interruptible transportation contracts to purchase its gas supply. Under interruptible transportation contracts, the transportation provider is permitted to interrupt service. Consumers’ use of incremental firm transportation contracts and interruptible transportation contracts is generally during off-peak summer months and after Consumers has fully utilized the services under the firm transportation contracts. The amount of interruptible transportation service and its use vary primarily with the price for this service and the availability and price of purchased and transported spot supplies.

## Enterprises Segment — Non-Utility Operations and Investments

CMS Energy’s enterprises segment, through various subsidiaries and certain equity investments, is engaged primarily in domestic IPP and the marketing of IPP. In 2007, the enterprises segment made a significant change in business strategy by exiting the international marketplace and refocusing on its independent power business in the U.S.

The enterprises segment’s operating revenue included in Income From Continuing Operations in CMS Energy’s Consolidated Financial Statements was $238 million in 2010, $216 million in 2009, and $365 million in 2008. The enterprises segment’s operating revenue included in Income (Loss) From Discontinued Operations in CMS Energy’s Consolidated Financial Statements was $10 million in 2010, $7 million in 2009, and $14 million in 2008.

IPP: While owned by CMS Enterprises, CMS Generation invested in and operated non-utility power generation plants in the U.S. and abroad. In 2007, CMS Enterprises sold CMS Generation and all of CMS



Enterprises’ international assets to third parties and transferred its domestic independent power plant operations to its subsidiary, HYDRA-CO.

The operating revenue from IPP included in Income From Continuing Operations in CMS Energy’s Consolidated Financial Statements was $18 million in 2010, $18 million in 2009, and $22 million in 2008. The operating revenue from IPP included in Income (Loss) From Discontinued Operations in CMS Energy’s Consolidated Financial Statements was $10 million in 2010, $7 million in 2009, and $14 million in 2008.

IPP Properties: At December 31, 2010, CMS Energy had ownership interests in independent power plants totaling 1,166 gross MW or 1,066 net MW. (Net MW reflects that portion of the gross capacity relating to CMS Energy’s ownership interests.)

Presented in the following table are CMS Energy’s interests in independent power plants at December 31, 2010:

<table><tr><td>Location</td><td>Primary Fuel Type</td><td>Ownership Interest (%)</td><td>Gross Capacity (MW)</td><td>Gross Capacity Under Long-Term Contract (%)</td></tr><tr><td>Connecticut(a)</td><td>Scrap tire</td><td>100</td><td>31</td><td>—</td></tr><tr><td>Michigan</td><td>Natural gas</td><td>100</td><td>710</td><td>88</td></tr><tr><td>Michigan</td><td>Natural gas</td><td>100</td><td>224</td><td>89</td></tr><tr><td>Michigan</td><td>Coal</td><td>50</td><td>73</td><td>100</td></tr><tr><td>Michigan</td><td>Biomass</td><td>50</td><td>40</td><td>100</td></tr><tr><td>Michigan</td><td>Biomass</td><td>50</td><td>38</td><td>100</td></tr><tr><td>North Carolina</td><td>Biomass</td><td>50</td><td>50</td><td>—</td></tr><tr><td>Total</td><td></td><td></td><td>1,166</td><td></td></tr></table>

(a) Represents Exeter. In January 2011, CMS Energy sold its ownership interest in Exeter to ReEnergy.

Energy Resource Management: CMS ERM purchases and sells energy commodities in support of CMS Energy’s generating facilities. In 2010, CMS ERM marketed 15 bcf of natural gas and 2,308 GWh of electricity. All marketed electricity was generated by IPPs of the enterprises segment. CMS ERM’s operating revenue included in Income From Continuing Operations in CMS Energy’s Consolidated Financial Statements was $220 million in 2010, $198 million in 2009, and $343 million in 2008.

Natural Gas Transmission: CMS Gas Transmission owned, developed, and managed domestic and international natural gas facilities. In 2007, CMS Gas Transmission sold a portfolio of its businesses in Argentina and its northern Michigan non-utility natural gas assets to Lucid Energy, and its investment in GasAtacama to Endesa S.A. In 2008, CMS Gas Transmission completed the sale of its investment in TGN. CMS Gas Transmission’s operating revenue included in Income From Continuing Operations in CMS Energy’s Consolidated Financial Statements was less than $1 million in each of 2010, 2009, and 2008.

International Energy Distribution: In 2007, CMS Energy exited this line of business when it sold its ownership interests in SENECA and CMS Energy Brasil S.A.

## OTHER BUSINESSES

EnerBank: EnerBank, a wholly owned subsidiary of CMS Energy, is a Utah state-chartered, FDIC-insured industrial bank providing unsecured consumer installment loans for financing home improvements. EnerBank’s operating revenue included in Income From Continuing Operations in CMS Energy’s Consolidated Financial Statements was $38 million in 2010, $26 million in 2009, and $21 million in 2008.

## CMS ENERGY AND CONSUMERS REGULATION

CMS Energy, Consumers, and their subsidiaries are subject to regulation by various federal, state, local, and foreign governmental agencies, including those described in the following sections.



## MPSC

Consumers is subject to the jurisdiction of the MPSC, which regulates public utilities in Michigan with respect to retail utility rates, accounting, utility services, certain facilities, corporate mergers, and other matters.

The Michigan Attorney General, ABATE, the MPSC staff, and certain other parties typically participate in MPSC proceedings concerning Consumers. The Michigan Attorney General, ABATE, and others often appeal significant MPSC orders.

Rate Proceedings: For information regarding open rate proceedings, see Item 8. Financial Statements and Supplementary Data, Notes to Consolidated Financial Statements, Note 6, Regulatory Matters.

## Michigan Energy Legislation

The 2008 Energy Legislation required that at least ten percent of Consumers' electric sales volume come from renewable energy sources by 2015, and included requirements for specific capacity additions. The 2008 Energy Legislation also required Consumers to prepare an energy optimization plan and achieve annual sales reduction targets through at least 2015. The targets are incremental with the goal of achieving a six percent reduction in customers' electricity use and a four percent reduction in customers' natural gas use by December 31, 2015. For additional information regarding Consumers' renewable energy and energy optimization plans, see Item 7. MD&A, Outlook, "Consumers' Electric Utility Business Outlook and Uncertainties."

The 2008 Energy Legislation also reformed the Customer Choice Act to limit alternative energy suppliers to supplying no more than ten percent of Consumers' weather-adjusted sales. For additional information regarding the Customer Choice Act, see Item 7. MD&A, Outlook, “Consumers’ Electric Utility Business Outlook and Uncertainties.”

## FERC

FERC has exercised limited jurisdiction over several independent power plants and exempt wholesale generators in which CMS Enterprises has ownership interests, as well as over CMS ERM, CMS Gas Transmission, and DIG. Among other things, FERC has jurisdiction over acquisitions, operations, and disposals of certain assets and facilities, services provided and rates charged, conduct among affiliates, and limited jurisdiction over holding company matters with respect to CMS Energy. FERC, in connection with NERC and with regional reliability organizations, also regulates generation owners and operators, load serving entities, purchase and sale entities, and others with regard to reliability of the bulk power system. Certain aspects of Consumers' gas business are also subject to regulation by FERC, including a blanket transportation tariff under which Consumers may transport gas in interstate commerce.

FERC also regulates certain aspects of Consumers' electric operations, including compliance with FERC accounting rules, wholesale rates, operation of licensed hydroelectric generating plants, transfers of certain facilities, corporate mergers, and issuances of securities.

## Other Regulation

The Secretary of Energy regulates imports and exports of natural gas and has delegated various aspects of this jurisdiction to FERC and the DOE’s Office of Fossil Fuels.

Consumers’ pipelines are subject to the Natural Gas Pipeline Safety Act of 1968 and the Pipeline Safety Improvement Act of 2002, which regulate the safety of gas pipelines.

EnerBank is regulated by the FDIC.

## CMS ENERGY AND CONSUMERS ENVIRONMENTAL COMPLIANCE

CMS Energy, Consumers, and their subsidiaries are subject to various federal, state, and local regulations for environmental quality, including air and water quality, solid waste management, and other matters. For additional



information concerning environmental matters, see Item 1A. Risk Factors and Item 8. Financial Statements and Supplementary Data, Notes to Consolidated Financial Statements, Note 5, Contingencies and Commitments.

CMS Energy has recorded a significant liability for its affiliates’ obligations associated with Bay Harbor. For additional information, see Item 1A. Risk Factors and Item 8. Financial Statements and Supplementary Data, Notes to Consolidated Financial Statements, Note 5, Contingencies and Commitments.

Air: Consumers continues to install state-of-the-art emissions control equipment at its electric generating plants and to convert electric generating units to burn cleaner fuels. Consumers estimates that it will incur expenditures of $1.4 billion from 2011 through 2018 to comply with present and future federal and state regulations that will require extensive reductions in nitrogen oxides, sulfur dioxide, particulate matter, and mercury emissions. Consumers’ estimate may increase if additional laws or regulations are adopted or implemented regarding greenhouse gases, including carbon dioxide. For additional information concerning estimated capital expenditures related to emissions control, see Item 7. MD&A, Outlook, “Consumers’ Electric Utility Business Outlook and Uncertainties — Electric Environmental Estimates.”

Solid Waste Disposal: Costs related to the construction, operation, and closure of solid waste disposal facilities for coal ash are significant. Historically, Consumers has worked with others to reuse 30 to 40 percent of ash produced by its coal-fueled plants, and sells ash for use as a Portland cement replacement in concrete products, as feedstock for the manufacture of Portland cement, and for other environmentally-compatible uses. Consumers' solid waste disposal areas are regulated under Michigan's solid waste rules. Consumers has converted all of its fly ash handling systems to dry systems, which reduce landfill venting substantially. All of Consumers' ash facilities have programs designed to protect the environment and are subject to quarterly MDNRE inspections. Furthermore, an independent consultant has assessed dike integrity and stability. No major deficiencies were identified that could immediately jeopardize continued safe and reliable operation of the project structures. The draft reports of three EPA contractors who have since inspected these facilities with regard to National Dam Safety Program Act requirements comport with this conclusion. The EPA has proposed new federal regulations for ash disposal areas. Consumers estimates that it will incur expenditures of $320 million from 2011 through 2018 to comply with future regulations relating to ash disposal. For additional information concerning estimated capital expenditures related to solid waste disposal, see Item 7. MD&A, Outlook, “Consumers’ Electric Utility Business Outlook and Uncertainties — Electric Environmental Estimates.”

Water: Consumers uses significant amounts of water to operate and cool its electric generating plants. Water discharge quality is regulated and administered by the MDNRE under the federal NPDES program. To comply with such regulation, Consumers’ facilities have discharge monitoring programs. The EPA is developing new regulations related to cooling water intake systems. Consumers estimates that it will incur expenditures of $180 million from 2011 through 2018 to comply with future regulations relating to cooling water intake systems. For additional information concerning estimated capital expenditures related to cooling water intake systems, see Item 7. MD&A, Outlook, “Consumers’ Electric Utility Business Outlook and Uncertainties — Electric Environmental Estimates.”

## CMS ENERGY AND CONSUMERS COMPETITION

## Electric Competition

Consumers’ electric utility business is subject to actual and potential competition from many sources, in both the wholesale and retail markets, as well as in electric generation, electric delivery, and retail services.

The Customer Choice Act allows all of Consumers’ electric customers to buy electric generation service from Consumers or from an alternative electric supplier. The 2008 Energy Legislation revised the Customer Choice Act by limiting alternative electric supply to ten percent of weather-adjusted retail sales for the preceding calendar year. At December 31, 2010, electric deliveries under the ROA program were at the ten percent limit. Alternative electric suppliers were providing 807 MW of generation service to ROA customers.

Consumers also has competition or potential competition from:

• industrial customers relocating all or a portion of their production capacity outside Consumers’ service territory for economic reasons;



• municipalities owning or operating competing electric delivery systems;

• customer self-generation; and

• adjacent utilities that extend lines to customers in contiguous service territories.

Consumers addresses this competition by monitoring activity in adjacent areas and monitoring compliance with the MPSC’s and FERC’s rules, providing non-energy services, and providing tariff-based incentives that support economic development.

CMS ERM continues to focus on optimizing CMS Energy’s IPP portfolio. CMS Energy’s IPP business faces competition from generators, marketers and brokers, and utilities marketing power in the wholesale market.

## Gas Competition

Competition exists in various aspects of Consumers’ gas utility business. Competition comes from other gas suppliers taking advantage of direct access to Consumers’ customers and from alternative fuels and energy sources, such as propane, oil, and electricity.

## INSURANCE

CMS Energy and its subsidiaries, including Consumers, maintain insurance coverage generally similar to comparable companies in the same lines of business. The insurance policies are subject to terms, conditions, limitations, and exclusions that might not fully compensate CMS Energy or Consumers for all losses. A portion of each loss is generally assumed by CMS Energy or Consumers in the form of deductibles and self-insured retentions that, in some cases, are substantial. As CMS Energy or Consumers renews its policies, it is possible that some of the present insurance coverage may not be renewed or obtainable on commercially reasonable terms due to restrictive insurance markets.

CMS Energy’s and Consumers’ present insurance program does not cover the risks of certain environmental cleanup costs and environmental damages, such as claims for air pollution, damage to sites owned by CMS Energy or Consumers, and some long-term storage or disposal of wastes.

## EMPLOYEES

## CMS Energy

At December 31, 2010, CMS Energy and its wholly owned subsidiaries, including Consumers, had 7,822 full-time equivalent employees. Included in the total are 3,310 full-time operating, maintenance, and construction employees and full-time and part-time call center employees who are represented by the Union.

## Consumers

At December 31, 2010, Consumers and its subsidiaries had 7,522 full-time equivalent employees. Included in the total are 3,310 full-time operating, maintenance, and construction employees and full-time and part-time call center employees who are represented by the Union.



CMS ENERGY EXECUTIVE OFFICERS (as of February 1, 2011)

<table><tr><td>Name</td><td>Age</td><td>Position</td><td>Period</td></tr><tr><td rowspan="8">John G. Russell</td><td rowspan="8">53</td><td>President and CEO of CMS Energy</td><td>5/2010-Present</td></tr><tr><td>President and CEO of Consumers</td><td>5/2010-Present</td></tr><tr><td>Director of CMS Energy</td><td>5/2010-Present</td></tr><tr><td>Director of Consumers</td><td>5/2010-Present</td></tr><tr><td>Director of CMS Enterprises</td><td>5/2010-Present</td></tr><tr><td>Chairman of the Board, President and CEO of CMS Enterprises</td><td>5/2010-Present</td></tr><tr><td>President and Chief Operating Officer of Consumers</td><td>2004-5/2010</td></tr><tr><td>Executive Vice President, CFO of CMS Energy</td><td>2002-Present</td></tr><tr><td rowspan="4">Thomas J. Webb</td><td rowspan="4">58</td><td>Executive Vice President, CFO of Consumers</td><td>2002-Present</td></tr><tr><td>Executive Vice President, CFO of CMS Enterprises</td><td>2002-Present</td></tr><tr><td>Director of CMS Enterprises</td><td>2002-Present</td></tr><tr><td>Senior Vice President and General Counsel of CMS Energy</td><td>11/2006-Present</td></tr><tr><td rowspan="8">James E. Brunner</td><td rowspan="8">58</td><td>Senior Vice President and General Counsel of Consumers</td><td>11/2006-Present</td></tr><tr><td>Senior Vice President and General Counsel of CMS Enterprises</td><td>11/2007-Present</td></tr><tr><td>Director of CMS Enterprises</td><td>2006-Present</td></tr><tr><td>Senior Vice President of CMS Enterprises</td><td>2006-11/2007</td></tr><tr><td>Senior Vice President, General Counsel and Chief Compliance Officer of CMS Energy</td><td>5/2006-11/2006</td></tr><tr><td>Senior Vice President, General Counsel and Chief Compliance Officer of Consumers</td><td>5/2006-11/2006</td></tr><tr><td>Senior Vice President and General Counsel of CMS Energy</td><td>2/2006-5/2006</td></tr><tr><td>Senior Vice President, General Counsel and Interim Chief Compliance Officer of Consumers</td><td>2/2006-5/2006</td></tr><tr><td>Vice President and General Counsel of Consumers</td><td>7/2004-2/2006</td></tr><tr><td rowspan="3">John M. Butler</td><td rowspan="3">46</td><td>Senior Vice President of CMS Energy</td><td>2006-Present</td></tr><tr><td>Senior Vice President of Consumers</td><td>2006-Present</td></tr><tr><td>Senior Vice President of CMS Enterprises</td><td>2006-Present</td></tr></table>



<table><tr><td>Name</td><td>Age</td><td>Position</td><td>Period</td></tr><tr><td rowspan="5">David G. Mengebier</td><td rowspan="5">53</td><td>Senior Vice President and Chief Compliance Officer of CMS Energy</td><td>11/2006-Present</td></tr><tr><td>Senior Vice President and Chief Compliance Officer of Consumers</td><td>11/2006-Present</td></tr><tr><td>Senior Vice President of CMS Enterprises</td><td>2003-Present</td></tr><tr><td>Senior Vice President of CMS Energy</td><td>2001-11/2006</td></tr><tr><td>Senior Vice President of Consumers</td><td>2001-11/2006</td></tr><tr><td rowspan="6">Glenn P. Barba</td><td rowspan="6">45</td><td>Vice President, Controller and Chief Accounting Officer of CMS Energy</td><td>2003-Present</td></tr><tr><td>Vice President, Controller and Chief Accounting Officer of Consumers</td><td>2003-Present</td></tr><tr><td>Vice President, Chief Accounting Officer and Controller of CMS Enterprises</td><td>11/2007-Present</td></tr><tr><td>Vice President and Chief Accounting Officer of CMS Enterprises</td><td>2003-11/2007</td></tr><tr><td></td><td></td></tr></table>

* From 2004 until June 2006, Mr. Butler was Human Resources Director, Manufacturing and Engineering at Dow Chemical Company, a non-affiliated company.

There are no family relationships among executive officers and directors of CMS Energy.

The term of office of each of the executive officers extends to the first meeting of the Board of Directors of CMS Energy after the next annual election of Directors of CMS Energy (scheduled to be held on May 20, 2011).

## CONSUMERS EXECUTIVE OFFICERS (as of February 1, 2011)

<table><tr><td>Name</td><td>Age</td><td>Position</td><td>Period</td></tr><tr><td rowspan="9">John G. Russell</td><td rowspan="9">53</td><td>President and CEO of CMS Energy</td><td>5/2010-Present</td></tr><tr><td>President and CEO of Consumers</td><td>5/2010-Present</td></tr><tr><td>Director of CMS Energy</td><td>5/2010-Present</td></tr><tr><td>Director of Consumers</td><td>5/2010-Present</td></tr><tr><td>Director of CMS Enterprises</td><td>5/2010-Present</td></tr><tr><td>Chairman of the Board, President and CEO of CMS Enterprises</td><td>5/2010-Present</td></tr><tr><td>President and Chief Operating Officer of Consumers</td><td>2004-5/2010</td></tr><tr><td rowspan="5">Thomas J. Webb</td><td rowspan="5">58</td><td>Executive Vice President, CFO of CMS Energy</td><td>2002-Present</td></tr><tr><td>Executive Vice President, CFO of Consumers</td><td>2002-Present</td></tr><tr><td>Executive Vice President, CFO of CMS Enterprises</td><td>2002-Present</td></tr><tr><td>Director of CMS Enterprises</td><td>2002-Present</td></tr></table>



<table><tr><td>Name</td><td>Age</td><td>Position</td><td>Period</td></tr><tr><td rowspan="12">James E. Brunner</td><td rowspan="12">58</td><td>Senior Vice President and General Counsel of CMS Energy</td><td>11/2006-Present</td></tr><tr><td>Senior Vice President and General Counsel of Consumers</td><td>11/2006-Present</td></tr><tr><td>Senior Vice President and General Counsel of CMS Enterprises</td><td>11/2007-Present</td></tr><tr><td>Director of CMS Enterprises</td><td>2006-Present</td></tr><tr><td>Senior Vice President of CMS Enterprises</td><td>2006-11/2007</td></tr><tr><td>Senior Vice President, General Counsel and Chief Compliance Officer of CMS Energy</td><td>5/2006-11/2006</td></tr><tr><td>Senior Vice President, General Counsel and Chief Compliance Officer of Consumers</td><td>5/2006-11/2006</td></tr><tr><td>Senior Vice President and General Counsel of CMS Energy</td><td>2/2006-5/2006</td></tr><tr><td>Senior Vice President, General Counsel and Chief Compliance Officer of Consumers</td><td>2/2006-5/2006</td></tr><tr><td>Vice President and General Counsel of Consumers</td><td>7/2004-2/2006</td></tr><tr><td rowspan="3">John M. Butler*</td><td rowspan="3">46</td><td>Senior Vice President of CMS Energy</td><td>2006-Present</td></tr><tr><td>Senior Vice President of Consumers</td><td>2006-Present</td></tr><tr><td>Senior Vice President of CMS Enterprises</td><td>2006-Present</td></tr><tr><td rowspan="6">David G. Mengebier</td><td rowspan="6">53</td><td>Senior Vice President and Chief Compliance Officer of CMS Energy</td><td>11/2006-Present</td></tr><tr><td>Senior Vice President and Chief Compliance Officer of Consumers</td><td>11/2006-Present</td></tr><tr><td>Senior Vice President of CMS Enterprises</td><td>2003-Present</td></tr><tr><td>Senior Vice President of CMS Energy</td><td>2001-11/2006</td></tr><tr><td>Senior Vice President of Consumers</td><td>2001-11/2006</td></tr><tr><td>Senior Vice President of Consumers</td><td></td></tr><tr><td>William E. Garrity</td><td>62</td><td>Senior Vice President of Consumers</td><td>2005-Present</td></tr><tr><td rowspan="3">Jackson L. Hanson</td><td rowspan="3">54</td><td>Senior Vice President of Consumers</td><td>5/2010-Present</td></tr><tr><td>Vice President of Consumers</td><td>11/2006-5/2010</td></tr><tr><td>Plant and Site Business Manager of Consumers</td><td>4/2006-11/2006</td></tr><tr><td rowspan="4">Daniel J. Malone</td><td rowspan="4">50</td><td>Senior Vice President of Consumers</td><td>5/2010-Present</td></tr><tr><td>Vice President of Consumers</td><td>6/2008-5/2010</td></tr><tr><td>Site Business Manager of Consumers</td><td>12/2006-6/2008</td></tr><tr><td>Manager of Equipment Services of Consumers</td><td>8/2006-12/2006</td></tr><tr><td rowspan="6">Glenn P. Barba</td><td rowspan="6">45</td><td>Vice President, Controller and Chief Accounting Officer of CMS Energy</td><td>2003-Present</td></tr><tr><td>Vice President, Controller and Chief Accounting Officer of Consumers</td><td>2003-Present</td></tr><tr><td>Vice President, Controller and Chief Accounting Officer CMS Enterprises</td><td>11/2007-Present</td></tr><tr><td>Vice President and Chief Accounting Officer of CMS Enterprises</td><td>2003-11/2007</td></tr><tr><td></td><td></td></tr></table>

* From 2004 until June 2006, Mr. Butler was Human Resources Director, Manufacturing and Engineering at Dow Chemical Company, a non-affiliated company.

There are no family relationships among executive officers and directors of Consumers.



The term of office of each of the executive officers extends to the first meeting of the Board of Directors of Consumers after the next annual election of Directors of Consumers (scheduled to be held on May 20, 2011).

## AVAILABLE INFORMATION

CMS Energy’s internet address is www.cmsenergy.com. Information contained on CMS Energy’s website is not incorporated herein. All of CMS Energy’s annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports filed pursuant to Section 13(a) or 15(d) of the Exchange Act are accessible free of charge on CMS Energy’s website. These reports are available soon after they are filed electronically with the SEC. Also on CMS Energy’s website are its:

• Corporate Governance Principles;

• Codes of Conduct (CMS Energy Corporation/Consumers Energy Company Board of Directors Code of Conduct — 2010 and Code of Conduct and Guide to Ethical Business Behavior 2010);

• Board committee charters (including the Audit Committee, the Compensation and Human Resources Committee, the Finance Committee, and the Governance and Public Responsibility Committee); and

• Articles of Incorporation (and amendments) and Bylaws.

CMS Energy will provide this information in print to any stockholder who requests it.

Any materials CMS Energy files with the SEC may also be read and copied at the SEC’s Public Reference Room at 100 F Street, NE, Washington D.C., 20549. Information on the operation of the Public Reference Room may be obtained by calling the SEC at 1-800-SEC-0330. The SEC also maintains an internet site that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC. The address is www.sec.gov.



Actual results in future periods for CMS Energy and Consumers could differ materially from historical results and the forward-looking statements contained in this report. Factors that might cause or contribute to these differences include, but are not limited to, those discussed in the following sections. CMS Energy’s and Consumers’ businesses are influenced by many factors that are difficult to predict, that involve uncertainties that may materially affect results, and that are often beyond their control. Additional risks and uncertainties not presently known or that the companies’ management believes to be immaterial may also adversely affect the companies. The risk factors described in the following sections, as well as the other information included in this report and in other documents filed with the SEC, should be considered carefully before making an investment in securities of CMS Energy or Consumers. Risk factors of Consumers are also risk factors of CMS Energy. All of these risk factors are potentially significant.

## CMS Energy depends on dividends from its subsidiaries to meet its debt service obligations.

Due to its holding company structure, CMS Energy depends on dividends from its subsidiaries to meet its debt service and other payment obligations. Restrictions contained in Consumers’ preferred stock provisions and other legal restrictions, such as certain terms in its articles of incorporation and FERC requirements, limit Consumers’ ability to pay dividends or acquire its own stock from CMS Energy. At December 31, 2010, Consumers had $404 million of unrestricted retained earnings available to pay common stock dividends. If sufficient dividends are not paid to CMS Energy by its subsidiaries, CMS Energy may not be able to generate the funds necessary to fulfill its payment obligations, which could have a material adverse effect on CMS Energy’s liquidity and financial condition.

## CMS Energy has indebtedness that could limit its financial flexibility and hence its ability to meet its debt service obligations.

At December 31, 2010, CMS Energy, including Consumers, had $7.2 billion aggregate principal amount of indebtedness, including $29 million of subordinated indebtedness relating to its convertible preferred securities. CMS Energy had $2.3 billion aggregate principal amount of indebtedness at December 31, 2010. At December 31, 2010, there were no borrowings and $3 million of letters of credit outstanding under CMS Energy’s revolving credit agreement. CMS Energy and its subsidiaries may incur additional indebtedness in the future.

The level of CMS Energy’s present and future indebtedness could have several important effects on its future operations, including, among others:

• a significant portion of CMS Energy’s cash flow from operations could be dedicated to the payment of principal and interest on its indebtedness and would not be available for other purposes;

• covenants contained in CMS Energy’s existing debt arrangements, which require it to meet certain financial tests, could affect its flexibility in planning for, and reacting to, changes in its business;

• CMS Energy’s ability to obtain additional financing for working capital, capital expenditures, acquisitions, and general corporate and other purposes could become limited;

• CMS Energy could be placed at a competitive disadvantage to its competitors that are less leveraged;

• CMS Energy’s vulnerability to adverse economic and industry conditions could increase; and

• CMS Energy’s future credit ratings could fluctuate.

CMS Energy’s ability to meet its debt service obligations and to reduce its total indebtedness will depend on its future performance, which will be subject to general economic conditions, industry cycles, changes in laws or regulatory decisions (including with respect to environmental matters), and financial, business, and other factors affecting its operations, many of which are beyond its control. CMS Energy cannot make assurances that its business will continue to generate sufficient cash flow from operations to service its indebtedness. If CMS Energy is unable to generate sufficient cash flows from operations, it may be required to sell assets or obtain additional financing. CMS Energy cannot ensure that additional financing will be available on commercially acceptable terms or at all.



CMS Energy cannot predict the outcome of regulatory reviews and claims regarding its participation in the development of Bay Harbor.

The EPA and the MDNRE have not completed their review of proposals by CMS Land and CMS Capital to remedy the flow of leachate from buried CKD piles at the Bay Harbor site to Lake Michigan and related environmental issues. One of the major issues to be resolved is determining a long-term solution to the disposal of leachate collected at the site. In December 2010, the MDNRE issued a five-year NPDES permit that authorizes CMS Land to discharge treated leachate into Little Traverse Bay. Costs to treat and discharge collected leachate under this permit could exceed those that are presently anticipated. Additionally, CMS Land and CMS Capital could be required to alter their present water disposal strategy upon expiration of this permit if the MDNRE or EPA identify a more suitable option, or if the permit itself is challenged before the MDNRE or the courts. CMS Land and CMS Capital, the MDNRE, the EPA, and other parties continue to negotiate the long-term remedy for the Bay Harbor site. These negotiations are focused on, among other things, issues related to:

• the disposal of leachate;

• the capping and excavation of CKD;

• the location and design of collection lines and upstream water diversion systems;

• application of criteria for various substances such as mercury; and

• other matters that are likely to affect the scope of remedial work that CMS Land and CMS Capital may be obligated to undertake.

Depending on the results of these negotiations, as well as the size of any indemnity obligation or liability under an Administrative Order on Consent signed by CMS Land and CMS Capital or other liability under environmental laws, adverse outcomes of some or all of these matters could have a material adverse effect on CMS Energy’s liquidity and financial condition and could negatively affect CMS Energy’s financial results.

CMS Energy could be affected adversely by a regulatory investigation and civil lawsuits regarding pricing information that CMS MST and CMS Field Services provided to market publications.

In 2002, CMS Energy notified appropriate regulatory and governmental agencies that some employees at CMS MST and CMS Field Services appeared to have provided inaccurate information regarding natural gas trades to various energy industry publications which compile and report index prices. CMS Energy is cooperating with an ongoing investigation by the DOJ regarding this matter. CMS Energy is unable to predict the outcome of the DOJ investigation or the amount of any fines or penalties that may be imposed and what effect, if any, the investigation will have on CMS Energy.

CMS Energy, CMS MST, CMS Field Services, Cantera Natural Gas, Inc., and Cantera Gas Company were named as defendants in various lawsuits arising as a result of alleged false natural gas price reporting. Allegations included manipulation of NYMEX natural gas futures and options prices, price-fixing conspiracies, and artificial inflation of natural gas retail prices in Colorado, Kansas, Missouri, Tennessee, and Wisconsin. CMS Energy cannot predict the outcome of the lawsuits or the amount of damages for which CMS Energy may be liable. It is possible that the outcome in one or more of the lawsuits could have a material adverse effect on CMS Energy’s liquidity, financial condition, and results of operations.

## CMS Energy and Consumers retain contingent liabilities in connection with their asset sales.

The agreements that CMS Energy and Consumers enter into for the sale of assets customarily include provisions whereby they are required to:

• retain specified preexisting liabilities, such as for taxes, pensions, or environmental conditions;

• indemnify the buyers against specified risks, including the inaccuracy of representations and warranties they make; and



• make payments to the buyers depending on the outcome of post-closing adjustments, litigation, audits, or other reviews, including claims resulting from attempts by foreign or domestic governments to assess taxes on past operations or transactions.

Many of these contingent liabilities can remain open for extended periods of time after the sales are closed. Depending on the extent to which the buyers may ultimately seek to enforce their rights under these contractual provisions, and the resolution of any disputes concerning them, there could be a material adverse effect on CMS Energy’s or Consumers’ liquidity, financial condition, and results of operations.

CMS Energy and Consumers have financing needs and could be unable to obtain bank financing or access the capital markets. Potential disruption in the capital and credit markets could have a material adverse effect on CMS Energy’s and Consumers’ businesses, including the availability and cost of short-term funds for liquidity requirements and their ability to meet long-term commitments. These consequences could have a material adverse effect on CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations.

CMS Energy and Consumers may be subject to liquidity demands under commercial commitments, guarantees, indemnities, and letters of credit. Consumers’ capital requirements are expected to be substantial over the next several years as it implements generation and environmental projects, and those requirements may increase if additional laws or regulations are adopted or implemented regarding greenhouse gases, including carbon dioxide.

CMS Energy and Consumers rely on the capital markets, particularly for publicly offered debt, as well as on bank syndications, to meet their financial commitments and short-term liquidity needs if internal funds are not available from CMS Energy’s and Consumers’ respective operations. CMS Energy and Consumers also use letters of credit issued under certain of their revolving credit facilities to support certain operations and investments.

Longer term disruptions in the capital and credit markets as a result of uncertainty, changing or increased regulation, reduced alternatives, or failures of significant financial institutions could adversely affect CMS Energy’s and Consumers’ access to liquidity needed for their respective businesses. Any disruption could require CMS Energy and Consumers to take measures to conserve cash until the markets stabilize or until alternative credit arrangements or other funding for their business needs can be arranged. These measures could include deferring capital expenditures, changing CMS Energy’s and Consumers’ commodity purchasing strategy to avoid collateral-posting requirements, and reducing or eliminating future share repurchases, dividend payments, or other discretionary uses of cash.

CMS Energy continues to explore financing opportunities to supplement its financial plan. These potential opportunities include refinancing and/or issuing new capital markets debt, preferred stock and/or common equity, and bank financing. Similarly, Consumers plans to seek funds through the capital markets, commercial lenders, and leasing arrangements. Entering into new financings is subject in part to capital market receptivity to utility industry securities in general and to CMS Energy’s and Consumers’ securities issuances in particular. CMS Energy and Consumers cannot guarantee the capital markets’ acceptance of their securities or predict the impact of factors beyond their control, such as actions of rating agencies. If CMS Energy or Consumers is unable to obtain bank financing or access the capital markets to incur or refinance indebtedness, or is unable to obtain commercially reasonable terms for any financing, there could be a material adverse effect on its liquidity, financial condition, and results of operations.

Certain of CMS Energy’s securities and those of its affiliates, including Consumers, are rated by various credit rating agencies. Any reduction or withdrawal of one or more of its credit ratings could have a material adverse impact on CMS Energy’s or Consumers’ ability to access capital on acceptable terms and maintain commodity lines of credit, could make its cost of borrowing higher, and could cause CMS Energy or Consumers to reduce its capital expenditures. If it is unable to maintain commodity lines of credit, CMS Energy or Consumers may have to post collateral or make prepayments to certain of its suppliers under existing contracts. Further, since Consumers provides dividends to CMS Energy, any adverse developments affecting Consumers that result in a lowering of its credit ratings could have an adverse effect on CMS Energy’s credit ratings. CMS Energy and Consumers cannot



guarantee that any of their present ratings will remain in effect for any given period of time or that a rating will not be lowered or withdrawn entirely by a rating agency.

## CMS Energy and Consumers could incur additional significant costs to comply with environmental requirements.

CMS Energy, Consumers, and their subsidiaries are subject to costly and increasingly stringent environmental regulations. They believe that environmental laws and regulations related to flue gas emissions, ash disposal, and cooling water use will continue to become more stringent and require them to make additional significant capital expenditures for emissions control equipment installation and upgrades.

In 2009, the EPA issued an endangerment finding for greenhouse gases under the Clean Air Act. In this finding, which has been challenged in the U.S. Court of Appeals for the D.C. Circuit by numerous parties, the EPA determined that present and projected atmospheric concentrations of six greenhouse gases threaten the public health and welfare of present and future generations. In May 2010, the EPA issued a final rule that addresses greenhouse gas emissions from stationary sources under the Clean Air Act permitting programs. The “tailoring rule” sets thresholds for greenhouse gas emissions that define when permits under the NSR and Title V programs are required for new and existing industrial facilities. This regulation took effect in January 2011. Comprehensive federal legislation that addresses greenhouse gases has not advanced in the U.S. Congress. Federal legislation is considered likely to be enacted in some form in the future and could have a significant impact on the operation and cost of existing and future fossil-fueled power plants.

In 2010, a significant percentage of the energy generated by Consumers came from fossil-fueled power plants. The emissions from fossil-fueled power plants would be subject to greenhouse gas regulations. CMS Enterprises also has interests in fossil-fueled power plants and other types of power plants that produce greenhouse gases. Federal laws and rules limiting the emission of greenhouse gases or similar state laws and rules, if enacted, as well as international accords and treaties, could require CMS Energy and Consumers to install additional equipment for emission controls, purchase carbon emissions allowances, curtail operations, invest in non-fossil-fuel generating capacity, or take other significant steps to manage or lower the emission of greenhouse gases. The following risks related to climate change could also have a material adverse impact on CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations:

• litigation originated by third parties against CMS Energy, Consumers, or their subsidiaries due to CMS Energy’s or Consumers’ greenhouse gas emissions;

• impairment of CMS Energy’s or Consumers’ reputation due to its greenhouse gas emissions and public perception of its response to potential greenhouse gas regulations, rules, and legislation; and

• extreme weather conditions, such as severe storms, that may affect customer demand, company operations, or assets.

The EPA is considering regulating CCBs, such as coal ash, as hazardous wastes under the Resource Conservation and Recovery Act. Michigan already regulates CCBs as low-hazard industrial waste. If coal ash is regulated as a hazardous waste, Consumers would likely cease the beneficial re-use of this product, resulting in significantly more coal ash requiring costly disposal. Additionally, it is possible that existing landfills could be closed if the upgrades to hazardous waste landfill standards are economically prohibitive. Costs associated with this potential regulation could be substantial.

The EPA is revising regulations that govern cooling water intake structures aimed at protecting aquatic life. Costs associated with these revisions could be material to CMS Energy, Consumers, and CMS Enterprises and result in operational changes or the retirement of certain generating units.

CMS Energy and Consumers expect to collect fully from their customers, through the ratemaking process, expenditures incurred to comply with environmental regulations. If Consumers were unable to recover these expenditures from customers in rates, it could negatively affect CMS Energy’s and/or Consumers’ liquidity, results of operations, and financial condition and CMS Energy and/or Consumers could be required to seek significant additional financing to fund these expenditures.



## CMS Energy’s and Consumers’ businesses could be affected adversely by any delay in meeting environmental requirements.

A delay or failure by CMS Energy or Consumers to obtain or maintain any necessary environmental permits or approvals to satisfy any applicable environmental regulatory requirements or install emission control equipment could:

• prevent the construction of new facilities;

• prevent the continued operation and sale of energy from existing facilities;

• prevent the modification of existing facilities; or

- result in significant additional costs that could have a material adverse effect on their liquidity, financial condition, or results of operations.

## Market performance and other changes could decrease the value of benefit plan assets, which then could require significant funding.

The performance of the capital markets affects the values of assets that are held in trust to satisfy future obligations under CMS Energy’s and Consumers’ pension and postretirement benefit plans. CMS Energy and Consumers have significant obligations under these plans and hold significant assets in these trusts. These assets are subject to market fluctuations and will yield uncertain returns, which may fall below CMS Energy’s and Consumers’ forecasted return rates. A decline in the market value of the assets or a change in the level of interest rates used to measure the required minimum funding levels may increase the funding requirements of these obligations. Also, changes in demographics, including increased number of retirements or changes in life expectancy assumptions, may increase the funding requirements of the obligations related to the pension and postretirement benefit plans. If CMS Energy and Consumers were unable to manage their pension and postretirement plan assets successfully, it could have a material adverse effect on their liquidity, financial condition, and results of operations.

## Periodic reviews of the values of CMS Energy’s and Consumers’ assets could result in accounting charges.

CMS Energy and Consumers are required by GAAP to review periodically the carrying value of their assets, including those that may be sold. Market conditions, the operational characteristics of their assets, and other factors could result in recording impairment charges for their assets, which could have an adverse effect on their stockholders' equity and their access to additional financing. In addition, CMS Energy and Consumers may be required to record impairment charges at the time they sell assets, depending on the sale prices they are able to secure and other factors.

## CMS Energy’s and Consumers’ businesses have safety risks.

Consumers’ electric and gas delivery systems, power plants, gas infrastructure, and energy products could be involved in accidents that result in injury or property loss to customers, employees, or the public. Although CMS Energy and Consumers have insurance coverage for many potential incidents, depending upon the nature or severity of any incident or accident, CMS Energy or Consumers could suffer financial loss, damage to its reputation, and negative repercussions from regulatory agencies or other public authorities.

## CMS Energy’s and Consumers’ revenues and results of operations are subject to risks that are beyond their control, including but not limited to natural disasters, terrorist attacks or related acts of war, hostile cyber intrusions, or other catastrophic events.

The impact of natural disasters, wars, terrorist acts, cyber intrusions, and other catastrophic events on the facilities and operations of CMS Energy and Consumers could have a material adverse effect on their liquidity, financial condition, and results of operations. A terrorist attack on physical infrastructure or a major natural disaster could result in severe damage to CMS Energy’s and Consumers’ assets beyond what could be recovered through insurance policies. Hostile cyber intrusions, including those targeting information systems as well as electronic control systems used at the generating plants and for the electric and gas distribution systems, could severely disrupt



business operations and result in loss of service to customers, as well as significant expense to repair security breaches or system damage. Terrorist attacks or acts of war could result in the disruption of power and fuel markets that could increase costs or disrupt service. Instability in the financial markets as a result of terrorism, war, natural disasters, credit crises, recessions, or other factors, could have a material adverse effect on CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations.

## CMS Energy and Consumers are exposed to significant reputational risks.

Consumers is actively engaged in multiple regulatory oversight processes and has a large electric and gas customer base. As a result, Consumers has a highly visible public profile in Michigan. Consumers and CMS Energy could suffer negative impacts to their reputations as a result of operational incidents, violations of corporate compliance policies, regulatory violations, or other events. This could have a material adverse effect on CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations. It could also result in negative customer perception and increased regulatory oversight.

Energy risk management strategies may not be effective in managing fuel and electricity pricing risks, which could result in unanticipated liabilities to Consumers and CMS Energy or increased volatility of their earnings.

Consumers is exposed to changes in market prices for natural gas, coal, electricity, emission allowances, and RECs. Prices for natural gas, coal, electricity, emission allowances, and RECs may fluctuate substantially over relatively short periods of time and expose Consumers to commodity price risk. A substantial portion of Consumers' operating expenses for its plants consists of the costs of obtaining these commodities. Consumers manage these risks using established policies and procedures, and it may use various contracts to manage these risks, including swaps, options, futures, and forward contracts. No assurance can be made that these strategies will be successful in managing Consumers' pricing risk or that they will not result in net liabilities to Consumers as a result of future volatility in these markets.

Natural gas prices in particular have been historically volatile. Consumers routinely enter into contracts to mitigate exposure to the risks of demand, market effects of weather, and changes in commodity prices associated with its gas distribution business. These contracts are executed in conjunction with the GCR mechanism, which is designed to allow Consumers to recover prudently incurred costs associated with those positions. Consumers does not always hedge the entire exposure of its operations from commodity price volatility. Furthermore, the ability to hedge exposure to commodity price volatility depends on liquid commodity markets. As a result, to the extent the commodity markets are illiquid, Consumers may not be able to execute its risk management strategies, which could result in greater unhedged positions than preferred at a given time. To the extent that unhedged positions exist, fluctuating commodity prices could have a negative effect on CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations.

Changes in taxation as well as the inherent difficulty in quantifying potential tax effects of business decisions could negatively impact CMS Energy’s and Consumers’ results of operations.

CMS Energy and Consumers are required to make judgments regarding the potential tax effects of various financial transactions and results of operations in order to estimate their obligations to taxing authorities. The tax obligations include income, real estate, sales and use taxes, employment-related taxes, and ongoing issues related to these tax matters. The judgments include determining reserves for potential adverse outcomes regarding tax positions that have been taken and may be subject to challenge by the IRS and/or other taxing authorities. Unfavorable settlements of any of the issues related to these reserves at CMS Energy or Consumers could have a material adverse effect on its liquidity, financial condition, and results of operations.

CMS Energy and Consumers are subject to changing tax laws. Increases in local, state, or federal tax rates or other changes in tax laws could have adverse impacts on their liquidity, financial condition, and results of operations.



## Consumers is exposed to risks related to general economic conditions in its service territories.

Consumers’ electric and gas utility businesses are affected by the economic conditions of the customers they serve. In Consumers’ service territories in Michigan, the economy has been affected adversely by economic and financial instability in the automotive and real estate sectors and by relatively high unemployment. The Michigan economy also has been affected negatively by the uncertainty in the financial and credit markets. If economic conditions in Michigan decline further, Consumers may experience reduced demand for electricity or natural gas that could result in decreased earnings and cash flow. In addition, economic conditions in Consumers’ service territory affect its collections of accounts receivable and levels of lost or stolen gas, which in turn impact its liquidity, financial condition, and results of operations.

## CMS Energy’s and Consumers’ energy sales and operations are affected by seasonal factors and varying weather conditions from year to year.

CMS Energy’s and Consumers’ businesses are seasonal. Demand for electricity is greater in the summer cooling season and the winter heating season. Demand for natural gas peaks in the winter heating season. Accordingly, their overall results in the future may fluctuate substantially on a seasonal basis. Mild temperatures during the summer cooling season and winter heating season could have a material adverse effect on CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations.

## Unplanned power plant outages could be costly for Consumers.

When unplanned maintenance work is required on power plants or other equipment, Consumers may be required to incur unplanned expenses and to make spot market purchases of electricity that exceed its costs of generation. If Consumers were unable to recover any of these increased costs in rates, it could have a material adverse effect on Consumers' liquidity, financial condition, and results of operations.

## A work interruption or other union actions could adversely affect CMS Energy and Consumers.

Over 40 percent of CMS Energy’s and Consumers’ employees are represented by a union. If these employees were to engage in a strike, work stoppage, or other slowdown, or if the terms and conditions in future labor agreements were renegotiated, CMS Energy and Consumers could experience a significant disruption in their operations and higher ongoing labor costs.

## Failure to attract and retain an appropriately qualified workforce could harm CMS Energy’s and Consumers’ results of operations.

If CMS Energy and Consumers were unable to match skill sets to future needs, they could encounter operating challenges and increased costs. These challenges could include a lack of resources, loss of knowledge, and delays in skill development. Additionally, higher costs could result from the use of contractors to replace employees, loss of productivity, and safety incidents. Failing to train replacement employees adequately and to transfer internal knowledge and expertise could affect CMS Energy’s and Consumers’ ability to manage and operate their businesses. If CMS Energy and Consumers were unable to attract and retain an appropriately qualified workforce, their results of operations could be affected negatively.

## Consumers may not be able to obtain an adequate supply of coal or natural gas, which could limit its ability to operate its electric generation facilities or serve its natural gas customers.

Consumers is dependent on coal for a significant portion of its electric generating capacity. While Consumers has coal supply and transportation contracts in place, there can be no assurance that the counterparties to these agreements will fulfill their obligations to supply coal to Consumers. The suppliers under the agreements may experience financial or operational problems that inhibit their ability to fulfill their obligations to Consumers. In addition, suppliers under these agreements may not be required to supply coal to Consumers under certain circumstances, such as in the event of a natural disaster. If Consumers were unable to obtain its coal requirements under existing or future coal supply and transportation contracts, it may be required to purchase coal at higher



prices, or it may be forced to purchase electricity from higher cost generating resources in the Midwest Energy Market, which would increase Consumers' working capital requirements.

Consumers has firm interstate transportation and supply agreements in place to facilitate deliveries of natural gas to its customers. Apart from the contractual and monetary remedies available to Consumers in the event of a counterparty’s failure to perform, there can be no assurances that the counterparties to these firm interstate transportation and supply agreements will fulfill their obligations to provide natural gas to Consumers. In addition, suppliers under these agreements may not be required to deliver natural gas to Consumers in certain circumstances, such as in the event of a natural disaster. If Consumers were unable to obtain its natural gas supply requirements under existing or future natural gas supply and transportation contracts, it could be required to purchase natural gas at higher prices from other sources or implement its natural gas curtailment program filed with the MPSC, which would increase Consumers’ working capital requirements and decrease its natural gas revenues.

Electric industry regulation could have a material adverse effect on CMS Energy’s and Consumers’ businesses.

Federal and state regulation of electric utilities has changed dramatically in the last two decades and could continue to change over the next several years. These changes could have a material adverse effect on CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations.

CMS Energy and Consumers are subject to, or affected by, extensive federal and state utility regulation. In CMS Energy’s and Consumers’ business planning and management of operations, they must address the effects of existing and proposed regulation on their businesses and changes in the regulatory framework, including initiatives by federal and state legislatures, regional transmission organizations, utility regulators, and taxing authorities. Adoption of new regulations by federal or state agencies, or changes to present regulations and interpretations of these regulations, could have a material adverse effect on CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations.

There are multiple proceedings pending before FERC involving transmission rates, regional transmission organizations, and electric bulk power markets and transmission. CMS Energy and Consumers cannot predict the impact of these electric industry restructuring proceedings on their liquidity, financial condition, and results of operations.

Electric industry legislation could have a material adverse effect on CMS Energy’s and Consumers’ businesses.

The 2008 Energy Legislation, among other things, limits alternative electric supply to ten percent of weather-adjusted retail sales for the preceding calendar year for ROA. Proposals have been made to raise that limit, which, if enacted, could have a material adverse effect on Consumers' business. Proposals also have been made to increase the electric sales volume that will be required from renewable energy sources. Other new legislation or interpretations could change how the businesses of CMS Energy and Consumers operate, impact the ability of Consumers to recover costs through rate increases, or require CMS Energy or Consumers to incur additional expenses.

The markets for alternative energy and distributed generation could impact financial results.

Advances in technology could reduce the cost of alternative methods of producing electricity, such as fuel cells, microturbines, windmills, and photovoltaic (solar) cells, to a level that is competitive with that of fossil-fuel technology utilized by CMS Energy and Consumers to produce a majority of their electricity. It is also possible that electric customers could reduce their electric consumption significantly through demand-side energy conservation programs. Changes in technology could also alter the channels through which electric customers buy electricity. Any of these changes could have a material adverse effect on CMS Energy’s and Consumers’ liquidity, financial condition, or results of operations.



CMS Energy and Consumers are subject to rate regulation, which could have an adverse effect on financial results.

CMS Energy and Consumers are subject to rate regulation. Electric and gas rates for their utilities are set by the MPSC and cannot be increased without regulatory authorization. While Consumers is permitted by the 2008 Energy Legislation to self-implement rate changes six months after a rate filing with the MPSC, subject to certain limitations, if a final rate order from the MPSC provides for lower rates than Consumers self-implemented, Consumers must refund the difference, with interest. Also, the MPSC may delay or deny implementation of a rate increase upon showing of good cause.

In addition, Consumers’ plans for making significant capital investments, including modifications to meet new environmental requirements and investment in new generation, could be affected adversely or could have a material adverse effect on Consumers if rate regulators fail to provide timely rate relief. Regulators seeking to avoid or minimize rate increases could resist raising customer rates sufficiently to permit Consumers to recover the full cost of modifications to meet environmental requirements and other prudent investments. In addition, because certain costs are mandated by state requirements for cost recovery, such as resource additions to meet Michigan’s renewable resource standard, regulators could be more inclined to oppose rate increases for other required items and investments. Rate regulators could also face pressure to avoid or limit rate increases for a number of reasons, including failure of Michigan’s economy to improve or diminishment of Consumers’ customer base. In addition to potentially affecting Consumers’ investment program, any limitation of cost recovery through rates could have a material adverse effect on Consumers’ liquidity, financial condition, and results of operations.

A further regulatory risk could arise from the MPSC’s adoption of mechanisms to decouple revenues from electricity and gas sales. The MPSC’s adoption or future treatment of these mechanisms could impact future revenues.

FERC authorizes certain subsidiaries of CMS Energy to sell electricity at market-based rates. Failure of CMS Energy and Consumers to obtain adequate rates or regulatory approvals in a timely manner could have a material adverse effect on CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations.

The various risks associated with the MPSC and FERC regulation of CMS Energy’s and Consumers’ businesses, which include the risk of adverse decisions in any number of rate or regulatory proceedings before either agency, could have a substantial negative effect on the companies’ investment plans and results of operations.

CMS Energy’s and Consumers’ financial statements, including their reported earnings, could be significantly impacted by convergence with International Financial Reporting Standards.

The FASB is expected to make broad changes to GAAP as part of an overall initiative to converge U.S. standards with International Financial Reporting Standards. These changes could have significant impacts on the financial statements of CMS Energy and Consumers. Also, the SEC is considering incorporating International Financial Reporting Standards into the financial reporting system for U.S. registrants. A transition to International Financial Reporting Standards could significantly impact CMS Energy’s and Consumers’ financial results, since these standards differ from GAAP in many ways. One of the major differences is the lack of special accounting treatment for regulated activities under International Financial Reporting Standards, which could result in greater earnings volatility for CMS Energy and Consumers.

## CMS Energy and Consumers are exposed to credit risk of those with whom they do business.

CMS Energy and Consumers are exposed to credit risk of counterparties with whom they do business. Adverse economic conditions or financial difficulties experienced by these counterparties could impair the ability of these counterparties to pay for CMS Energy’s and Consumers’ services or fulfill their contractual obligations, including performance and payment of damages. CMS Energy and Consumers depend on these counterparties to remit payments and perform services timely. Any delay or default in payment or performance of contractual obligations could have a material adverse effect on CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations.



In recent years, the capital and credit markets have experienced unprecedented high levels of volatility and disruption. Market disruption and volatility could have a negative impact on CMS Energy’s and Consumers’ lenders, suppliers, customers, and other counterparties, causing them to fail to meet their obligations. Adverse economic conditions could also have a negative impact on the loan portfolio of CMS Energy’s banking subsidiary, EnerBank.

CMS Energy could be required to pay cash to certain security holders in connection with the optional conversion of their convertible securities.

CMS Energy has issued two series of cash-convertible securities, of which an aggregate principal amount of $460 million was outstanding at December 31, 2010. If the trading price of CMS Energy’s common stock exceeds specified amounts at the end of a particular fiscal quarter, then holders of one or more series of these convertible securities will have the option to convert their securities in the following fiscal quarter, with the principal amount payable in cash by CMS Energy. Accordingly, if these trading price minimums are satisfied and security holders exercise their conversion rights, CMS Energy may be required to outlay a significant amount of cash to those security holders, which could have a material adverse effect on CMS Energy’s liquidity and financial condition.

There are risks associated with Consumers’ significant capital investment program planned for the next five years.

Consumers’ planned investments include an advanced metering infrastructure program, renewable power generation, gas compression, environmental controls, other electric and gas infrastructure to upgrade delivery systems, and, potentially, new power plants. The success of these investments depends on or could be affected by a variety of factors including, but not limited to, effective cost and schedule management during implementation, changes in commodity and other prices, operational performance, changes in environmental, legislative and regulatory requirements, and regulatory cost recovery. Consumers cannot predict the impact that any of these factors could have on the success of its capital investment program. It is possible that adverse events associated with these factors could have a material adverse effect on Consumers’ liquidity, financial condition, and results of operations.

## ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

## ITEM 2. PROPERTIES

Descriptions of CMS Energy’s and Consumers’ properties are found in the following sections of Item 1, all of which are incorporated by reference in this Item 2:

• Business, Business Segments, Consumers Electric Utility, Electric Utility Properties;

• Business, Business Segments, Consumers Gas Utility, Gas Utility Properties; and

• Business, Business Segments, Enterprises Segment — Non-Utility Operations and Investments, IPP Properties.

## ITEM 3. LEGAL PROCEEDINGS

For information regarding CMS Energy’s, Consumers’, and their subsidiaries’ significant pending administrative and judicial proceedings involving regulatory, operating, transactional, environmental, and other matters, see Item 8. Financial Statements and Supplementary Data, Notes to Consolidated Financial Statements, Note 5, Contingencies and Commitments and Note 6, Regulatory Matters.

CMS Energy, Consumers, and certain of their subsidiaries and affiliates are also parties to routine lawsuits and administrative proceedings incidental to their businesses involving, for example, claims for personal injury and property damage, contractual matters, various taxes, and rates and licensing.

## ITEM 4. REMOVED AND RESERVED



## PART II

## ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

## CMS Energy

CMS Energy’s common stock is traded on the New York Stock Exchange. Market prices for CMS Energy’s common stock and related security holder matters are contained in Item 7. MD&A and Item 8. Financial Statements and Supplementary Data, Notes to Consolidated Financial Statements, Note 22, Quarterly Financial and Common Stock Information (Unaudited), which are incorporated by reference herein. At February 10, 2011, the number of registered holders of CMS Energy’s common stock totaled 42,360, based on the number of record holders. Presented in the following table are CMS Energy’s dividends on its common stock:

<table><tr><td rowspan="2"></td><td colspan="4">Per Share</td></tr><tr><td>February</td><td>May</td><td>August</td><td>November</td></tr><tr><td>2010</td><td>$0.150</td><td>$0.150</td><td>$0.150</td><td>$0.210</td></tr><tr><td>2009</td><td>$0.125</td><td>$0.125</td><td>$0.125</td><td>$0.125</td></tr></table>

Information regarding securities authorized for issuance under equity compensation plans is included in CMS Energy’s definitive proxy statement, which is incorporated by reference herein. For additional information regarding dividends and dividend restrictions, see Item 8. Financial Statements and Supplementary Data, Notes to Consolidated Financial Statements, Note 7, Financials and Capitalization.

## Consumers

Consumers’ common stock is privately held by its parent, CMS Energy, and does not trade in the public market. Presented in the following table are Consumers’ cash dividends on its common stock:

<table><tr><td rowspan="2"></td><td colspan="4">In Millions</td></tr><tr><td>February</td><td>May</td><td>August</td><td>November</td></tr><tr><td>2010</td><td>$114</td><td>$54</td><td>$ 91</td><td>$99</td></tr><tr><td>2009</td><td>$ 72</td><td>$58</td><td>$103</td><td>$52</td></tr></table>

For additional information regarding dividends and dividend restrictions, see Item 8. Financial Statements and Supplementary Data, Notes to Consolidated Financial Statements, Note 7, Financials and Capitalization.

## Issuer Repurchases of Equity Securities

Presented in the following table are CMS Energy’s repurchases of equity securities for the three months ended December 31, 2010:

<table><tr><td>Period</td><td>Total Number of Shares Purchased (a)</td><td>Average Price Paid per Share</td><td>Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs</td><td>Maximum Number of Shares that May Yet Be Purchased Under Publicly Announced Plans or Programs</td></tr><tr><td>October 1, 2010 to October 31, 2010</td><td>2,071</td><td>$18.54</td><td>—</td><td>—</td></tr><tr><td>November 1, 2010 to November 30, 2010</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>December 1, 2010 to December 31, 2010</td><td>1,861</td><td>18.62</td><td>—</td><td>—</td></tr><tr><td>Total</td><td>3,932</td><td>$18.58</td><td>—</td><td>—</td></tr></table>

(a) Common shares were purchased to satisfy CMS Energy’s minimum statutory income tax withholding obligation for common shares that have vested under the PISP. Shares repurchased have a value based on the market price on the vesting date.



## Unregistered Sales of Equity Securities

On December 30, 2010, CMS Energy issued 166,930 shares of its common stock and paid $3 million in cash in exchange for $3 million aggregate principal amount of its 3.375 percent Convertible Senior Notes Due 2023, Series B. These convertible notes were tendered for conversion on December 13, 2010 in accordance with the terms and provisions of the Indenture of CMS Energy dated as of September 15, 1992, as supplemented by the Sixteenth Supplemental Indenture dated as of December 16, 2004. Such shares of common stock were issued based on the conversion value of $2,006.88 per $1,000 principal amount of convertible note. The issuance of these shares of common stock was an exchange of securities with existing shareholders and was exempt from registration pursuant to Section 3(a)(9) of the Securities Act of 1933, as amended.

## ITEM 6. SELECTED FINANCIAL DATA

## CMS Energy

Selected financial information is contained in Item 8. Financial Statements and Supplementary Data, CMS Energy’s Selected Financial Information, which is incorporated by reference herein.

## Consumers

Selected financial information is contained in Item 8. Financial Statements and Supplementary Data, Consumers’ Selected Financial Information, which is incorporated by reference herein.

## ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

## CMS Energy

Management’s discussion and analysis of financial condition and results of operations is contained in Item 8. Financial Statements and Supplementary Data, MD&A, which is incorporated by reference herein.

## Consumers

Management’s discussion and analysis of financial condition and results of operations is contained in Item 8. Financial Statements and Supplementary Data, MD&A, which is incorporated by reference herein.

## ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

## CMS Energy

Quantitative and qualitative disclosures about market risk are contained in Item 8. Financial Statements and Supplementary Data, MD&A, Critical Accounting Policies, “Financial and Derivative Instruments and Market Risk Information,” which is incorporated by reference herein.

## Consumers

Quantitative and qualitative disclosures about market risk are contained in Item 8. Financial Statements and Supplementary Data, MD&A, Critical Accounting Policies, “Financial and Derivative Instruments and Market Risk Information,” which is incorporated by reference herein.



## ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Index to Financial Statements:
Selected Financial Information
CMS Energy ..... 47
Consumers ..... 48
Management's Discussion and Analysis ..... 49
Consolidated Financial Statements
CMS Energy ..... 76
Consumers ..... 85
Notes to Consolidated Financial Statements ..... 92
Reports of Independent Registered Public Accounting Firms
CMS Energy ..... 172
Consumers ..... 173



(This page intentionally left blank)



CMS ENERGY

2010 Consolidated Financial Statements

and

Consumers Energy

Count on Us

2010 Consolidated Financial Statements



<table><tr><td colspan="3">Selected Financial Information</td><td colspan="4">CMS Energy Corporation</td></tr><tr><td></td><td>2010</td><td>2009</td><td>2008</td><td>2007</td><td>2006</td><td></td></tr><tr><td>Operating revenue (in millions)</td><td>6,432</td><td>6,205</td><td>6,807</td><td>6,451</td><td>6,117</td><td></td></tr><tr><td>Income (loss) from equity method investees (in millions)</td><td>11</td><td>(2)</td><td>5</td><td>40</td><td>89</td><td></td></tr><tr><td>Income (loss) from continuing operations (in millions)(a)</td><td>366</td><td>220</td><td>301</td><td>(120)</td><td>(242)</td><td></td></tr><tr><td>Income (loss) from discontinued operations (in millions)</td><td>(23)</td><td>20</td><td>1</td><td>(110)</td><td>60</td><td></td></tr><tr><td>Net income (loss) available to common stockholders (in millions)</td><td>324</td><td>218</td><td>284</td><td>(234)</td><td>(96)</td><td></td></tr><tr><td>Average common shares outstanding (in thousands)</td><td>231,473</td><td>227,169</td><td>225,671</td><td>224,473</td><td>221,618</td><td></td></tr><tr><td>Earnings (loss) from continuing operations per average common share</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>CMS Energy — Basic</td><td>1.50</td><td>0.87</td><td>1.25</td><td>(0.65)</td><td>(0.67)</td><td></td></tr><tr><td>- Diluted</td><td>1.36</td><td>0.83</td><td>1.20</td><td>(0.65)</td><td>(0.67)</td><td></td></tr><tr><td>Earnings (loss) per average common share</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>CMS Energy — Basic</td><td>1.40</td><td>0.96</td><td>1.25</td><td>(1.04)</td><td>(0.43)</td><td></td></tr><tr><td>- Diluted</td><td>1.28</td><td>0.91</td><td>1.20</td><td>(1.04)</td><td>(0.43)</td><td></td></tr><tr><td>Cash provided by operations (in millions)</td><td>959</td><td>848</td><td>557</td><td>23</td><td>688</td><td></td></tr><tr><td>Capital expenditures, excluding assets placed under capital lease (in millions)</td><td>821</td><td>818</td><td>792</td><td>1,263</td><td>670</td><td></td></tr><tr><td>Total assets (in millions)</td><td>15,616</td><td>15,256</td><td>14,901</td><td>14,180</td><td>15,324</td><td></td></tr><tr><td>Long-term debt, excluding current portion (in millions)</td><td>6,448</td><td>5,895</td><td>6,015</td><td>5,533</td><td>6,338</td><td></td></tr><tr><td>Non-current portion of capital and finance lease obligations (in millions)</td><td>188</td><td>197</td><td>206</td><td>225</td><td>42</td><td></td></tr><tr><td>Total preferred stock (in millions)</td><td>—</td><td>239</td><td>243</td><td>250</td><td>261</td><td></td></tr><tr><td>Cash dividends declared per common share</td><td>0.66</td><td>0.50</td><td>0.36</td><td>0.20</td><td>—</td><td></td></tr><tr><td>Market price of common stock at year-end</td><td>18.60</td><td>15.66</td><td>10.11</td><td>17.38</td><td>16.70</td><td></td></tr><tr><td>Book value per common share at year-end</td><td>11.19</td><td>11.42</td><td>10.93</td><td>9.54</td><td>10.14</td><td></td></tr><tr><td>Number of employees at year-end (full-time equivalents)</td><td>7,822</td><td>8,039</td><td>7,970</td><td>7,898</td><td>8,640</td><td></td></tr><tr><td>Electric Utility Statistics</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Sales (billions of kWh)</td><td>38</td><td>36</td><td>37</td><td>39</td><td>38</td><td></td></tr><tr><td>Customers (in thousands)</td><td>1,792</td><td>1,796</td><td>1,814</td><td>1,799</td><td>1,797</td><td></td></tr><tr><td>Average sales rate per kWh</td><td>10.54</td><td>9.81</td><td>9.48</td><td>8.65</td><td>8.46</td><td></td></tr><tr><td>Gas Utility Statistics</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Sales and transportation deliveries (bcf)</td><td>317</td><td>319</td><td>338</td><td>340</td><td>309</td><td></td></tr><tr><td>Customers (in thousands)(b)</td><td>1,711</td><td>1,708</td><td>1,713</td><td>1,710</td><td>1,714</td><td></td></tr><tr><td>Average sales rate per mcf</td><td>10.60</td><td>10.73</td><td>11.25</td><td>10.66</td><td>10.44</td><td></td></tr></table>

(a) Income (loss) from continuing operations includes income (loss) attributable to noncontrolling interests of $3 million at December 31, 2010, $11 million at December 31, 2009, $7 million at December 31, 2008, $8 million at December 31, 2007, and $97 million at December 31, 2006.

(b) Excludes off-system transportation customers.



<table><tr><td rowspan="2">Selected Financial Information</td><td colspan="5">Consumers Energy Company</td></tr><tr><td>2010</td><td>2009</td><td>2008</td><td>2007</td><td>2006</td></tr><tr><td>Operating revenue (in millions)</td><td>6,156</td><td>5,963</td><td>6,421</td><td>6,064</td><td>5,721</td></tr><tr><td>Income from equity method investees (in millions)</td><td>—</td><td>—</td><td>—</td><td>—</td><td>1</td></tr><tr><td>Net income (in millions)</td><td>434</td><td>293</td><td>364</td><td>312</td><td>186</td></tr><tr><td>Net income available to common stockholder (in millions)</td><td>432</td><td>291</td><td>362</td><td>310</td><td>184</td></tr><tr><td>Cash provided by operations (in millions)</td><td>910</td><td>922</td><td>873</td><td>440</td><td>474</td></tr><tr><td>Capital expenditures, excluding assets placed under capital lease (in millions)</td><td>815</td><td>811</td><td>789</td><td>1,258</td><td>646</td></tr><tr><td>Total assets (in millions)</td><td>14,839</td><td>14,622</td><td>14,246</td><td>13,401</td><td>12,845</td></tr><tr><td>Long-term debt, excluding current portion (in millions)</td><td>4,488</td><td>4,063</td><td>3,908</td><td>3,692</td><td>4,127</td></tr><tr><td>Non-current portion of capital and finance lease obligations (in millions)</td><td>188</td><td>197</td><td>206</td><td>225</td><td>42</td></tr><tr><td>Total preferred stock (in millions)</td><td>44</td><td>44</td><td>44</td><td>44</td><td>44</td></tr><tr><td>Number of preferred stockholders at year-end</td><td>1,496</td><td>1,531</td><td>1,584</td><td>1,641</td><td>1,728</td></tr><tr><td>Number of employees at year-end (full-time equivalents)</td><td>7,522</td><td>7,755</td><td>7,697</td><td>7,614</td><td>8,026</td></tr><tr><td>Electric Utility Statistics</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Sales (billions of kWh)</td><td>38</td><td>36</td><td>37</td><td>39</td><td>38</td></tr><tr><td>Customers (in thousands)</td><td>1,792</td><td>1,796</td><td>1,814</td><td>1,799</td><td>1,797</td></tr><tr><td>Average sales rate per kWh</td><td>10.54</td><td>9.81</td><td>9.48</td><td>8.65</td><td>8.46</td></tr><tr><td>Gas Utility Statistics</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Sales and transportation deliveries (bcf)</td><td>317</td><td>319</td><td>338</td><td>340</td><td>309</td></tr><tr><td>Customers (in thousands)(a)</td><td>1,711</td><td>1,708</td><td>1,713</td><td>1,710</td><td>1,714</td></tr><tr><td>Average sales rate per mcf</td><td>10.60</td><td>10.73</td><td>11.25</td><td>10.66</td><td>10.44</td></tr></table>

(a) Excludes off-system transportation customers.



# CMS Energy Corporation
Consumers Energy Company
MANAGEMENT'S DISCUSSION AND ANALYSIS

This MD&A is a combined report of CMS Energy and Consumers.

## EXECUTIVE OVERVIEW

CMS Energy is an energy company operating primarily in Michigan. It is the parent holding company of several subsidiaries, including Consumers, an electric and gas utility, and CMS Enterprises, primarily a domestic IPP. Consumers’ electric utility operations include the generation, purchase, distribution, and sale of electricity, and Consumers’ gas utility operations include the purchase, transmission, storage, distribution, and sale of natural gas. Consumers’ customer base consists of a mix of residential, commercial, and diversified industrial customers. CMS Enterprises, through its subsidiaries and equity investments, owns and operates power generation facilities.

CMS Energy and Consumers manage their businesses by the nature of services each provides. CMS Energy operates principally in three business segments: electric utility; gas utility; and enterprises, its non-utility investments and operations. Consumers operates principally in two business segments: electric utility and gas utility.

CMS Energy and Consumers earn revenue and generate cash from operations by providing electric and natural gas utility services; electric distribution and generation; gas transmission, storage, and distribution; and other energy-related services. Their businesses are affected primarily by:

• regulation and regulatory matters;

• economic conditions;

• weather;

• energy commodity prices;

• interest rates; and

• CMS Energy’s and Consumers’ securities’ credit ratings.

During the past several years, CMS Energy’s “Growing Forward” business strategy has emphasized the following key elements:



## Utility Investment

Consumers expects to make capital investments of more than $6 billion over the next five years, with a key aspect of its strategy being the balanced energy initiative. The balanced energy initiative is a comprehensive energy resource plan to meet Consumers’ projected short-term and long-term electric power requirements with energy efficiency, demand management, expanded use of renewable energy, development of new power plants, pursuit of



additional PPAs to complement existing generating sources, potential retirement or mothballing of older generating units, and continued operation of others.

Presented in the following illustration are CMS Energy’s and Consumers’ estimated capital expenditures, including lease commitments, for 2011 through 2015:



Renewable energy projects are a major component of Consumers’ planned capital investments. Consumers expect to spend $650 million on renewable energy investments through 2015. The 2008 Energy Legislation requires that at least ten percent of Consumers’ electric sales volume come from renewable energy sources by 2015, and includes requirements for specific capacity additions. Consumers has historically included renewable resources as part of its portfolio, with about five percent of its present power supply coming from such renewable sources as hydroelectric, landfill gas, biomass, and wind. In 2010, Consumers filed with the MPSC its first annual reports and reconciliations for its renewable energy plan and its energy optimization plan, requesting approval of 2009 plan costs. As one of the conditions to the continuation of the electric and gas decoupling mechanisms that were adopted in general rate cases, Consumers must exceed the statutory savings targets specified in the 2008 Energy Legislation for 2011 through 2014. In December 2010, the MPSC approved Consumers’ amended energy optimization plan to recover the additional spending necessary to exceed these savings targets.

In February 2011, Consumers and Detroit Edison together announced an $800 million maintenance and upgrade project at their jointly owned Ludington pumped-storage plant. The project, scheduled to begin in 2013 and extend through 2019, will increase the capacity of Ludington from its present level of 1,872 MW to about 2,172 MW. Consumers expects its share of the project cost to total $400 million.

Consumers’ smart grid program will also represent a significant capital investment. The initial deployment will include advanced metering infrastructure and will follow a phased approach, beginning in early 2012. Consumers expect to spend $355 million on its smart grid program through 2015.

In May 2010, Consumers announced plans to defer the development of its proposed 830-MW coal-fueled plant at its Karn/Weadock generating complex. This decision reflects reduced customer demand for electricity resulting from the recession in Michigan, forecasted lower natural gas prices due to recent developments in shale gas recovery technology, and projected surplus generating capacity in the MISO market.



## REGULATION

Regulatory matters are a key aspect of CMS Energy’s and Consumers’ businesses, particularly Consumers’ rate cases and regulatory proceedings before the MPSC. Recent significant regulatory events and developments are summarized below.

• Big Rock Decommissioning Refund: In February 2010, the MPSC issued an order requiring that Consumers refund to customers $85 million collected during a rate freeze from 2001 to 2003 plus interest. Consumers completed this refund in January 2011. Consumers has filed an appeal of this order.

• 2009 Gas Rate Case: In May 2010, the MPSC issued a gas rate order authorizing Consumers to increase its gas rates in an annual amount of $66 million based on an authorized return on equity of 10.55 percent. This rate order also adopted a pilot revenue decoupling mechanism. In general, a decoupling mechanism allows a utility to adjust rates due to changes in sales volumes, in order to improve the match between the collection of revenues and the revenue level approved by the utility's regulator. Consumers' gas decoupling mechanism, subject to certain conditions, allows Consumers to adjust future gas rates to compensate for changes in sales volumes resulting from energy efficiency, conservation, and other non-weather factors. This mechanism is subject to review at the end of annual periods.

• 2010 Gas Rate Case: In August 2010, Consumers filed an application with the MPSC seeking an annual gas rate increase of $55 million based on an 11 percent authorized return on equity. The filing requested recovery for investments made to enhance safety, system reliability, and operational efficiencies that improve service to customers. In January 2011, Consumers filed testimony and exhibits with the MPSC in support of a self-implemented annual gas rate increase of $48 million, subject to refund with interest. In February 2011, Consumers filed a letter with the MPSC revising the proposed self-implemented increase to $29 million. The MPSC issued an order in February 2011, delaying Consumers' self-implementation in order to give other parties to the proceeding an opportunity to respond to Consumers' revised self-implementation filing.

• 2010 Electric Rate Case: In November 2010, the MPSC issued an electric rate order authorizing Consumers to increase its rates in an annual amount of $146 million based on an authorized return on equity of 10.7 percent. This electric rate order continues Consumers' pilot electric decoupling mechanism, which, subject to certain conditions, was adopted in a November 2009 electric rate order. The electric decoupling mechanism is similar to the gas decoupling mechanism, but also permits rate adjustments to compensate for changes in sales volumes resulting from weather fluctuations. The mechanism is subject to review at the end of annual periods.

Environmental regulation is another area of importance for CMS Energy and Consumers. In 2009, the EPA issued an endangerment finding that greenhouse gases, including carbon dioxide, contribute to air pollution that may endanger the public health and welfare, thus setting the stage for regulation of carbon dioxide emissions under the Clean Air Act. The EPA also issued an Advance Notice of Proposed Rulemaking in April 2010, indicating that it is considering a variety of regulatory actions with respect to PCBs. In June 2010, the EPA proposed a range of alternatives for regulating CCBs, such as coal ash, under the Resource Conservation and Recovery Act. In July 2010, the EPA released CATR, a proposed rule that would replace CAIR. CMS Energy and Consumers are monitoring these developments for potential effects on their plans and operations.

## SAFETY

The safety and security of employees, customers, and the general public remain a priority of CMS Energy and Consumers. Accordingly, CMS Energy and Consumers have worked to integrate a set of safety principles into their business operations and culture. These principles include complying with applicable safety, health, and security regulations and implementing programs and processes aimed at continually improving safety and security conditions.



In 2010, CMS Energy’s net income available to common stockholders was $324 million, and diluted earnings per share were $1.28. This compares with net income available to common stockholders of $218 million and diluted earnings per share of $0.91 in 2009.

Among the most significant factors contributing to CMS Energy’s improved performance in 2010 were benefits from electric and gas rate orders, the absence of a revenue reduction in 2009 associated with the Big Rock decommissioning refund order, increased deliveries of electricity, and an insurance settlement related to a previously sold investment.

Also in 2010, CMS Energy recognized a $40 million charge to increase the recorded liability for its affiliates' environmental remediation obligation associated with Bay Harbor. This increase was due to several factors, including anticipated cost increases for the disposal of leachate under an NPDES permit issued by the MDNRE; additional costs for the increased scope of remediation to meet EPA and MDNRE requirements; and increased legal, management, and engineering costs due to delays in reaching an agreement with all involved parties. In addition, Consumers recorded charges of $22 million in 2010 to write off previously capitalized development costs associated with its proposed coal-fueled plant. These charges reflected Consumers' decision to defer the development of the plant, and the reduced likelihood that the plant will be constructed.

A more detailed discussion of the factors affecting CMS Energy’s and Consumers’ performance in 2010 can be found in the “Results of Operations” section that follows this Executive Overview.

In 2010, Consumers’ weather-adjusted electric deliveries increased by 1.7 percent over 2009, while Consumers’ weather-adjusted gas deliveries were at similar levels to 2009. These trends support CMS Energy’s view that economic conditions in Michigan have stabilized. Although Michigan’s economy continues to be affected by the recession and its impact on the state’s automotive industry, by high unemployment rates, and by a modestly shrinking population, there are indications that the recession is easing in Michigan. Consumers expect its electric sales to increase by about 1.5 percent annually through 2016, driven largely by the continued rise in industrial production. Consumers is projecting that its gas sales will decline by about one percent annually through 2016, due largely to energy efficiency and conservation.

As Consumers continues to seek fair and timely regulatory treatment, delivering customer value will remain a key strategic priority. To keep costs down for its utility customers, Consumers has set aggressive goals for annual productivity improvements. Additionally, Consumers will strive to give priority to capital investments that increase customer value or lower costs.

Consumers expect to continue to have sufficient capacity to fund its investment-based growth plans. CMS Energy also expects its sources of liquidity to remain sufficient to meet its cash requirements. CMS Energy and Consumers will continue to monitor developments in the financial and credit markets, as well as government policy responses to those developments, for potential implications for their businesses and their future financial needs.

## RESULTS OF OPERATIONS

## CMS ENERGY's CONSOLIDATED RESULTS OF OPERATIONS

<table><tr><td rowspan="2">Years Ended December 31</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td colspan="3">In Millions (except for Per Share Amounts)</td></tr><tr><td>Net Income Available to Common Stockholders</td><td>$ 324</td><td>$ 218</td><td>$ 284</td></tr><tr><td>Basic Earnings Per Share</td><td>$ 1.40</td><td>$ 0.96</td><td>$ 1.25</td></tr><tr><td>Diluted Earnings Per Share</td><td>$ 1.28</td><td>$ 0.91</td><td>$ 1.20</td></tr></table>



<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>Change</td><td>2009</td><td>2008</td><td>Change</td></tr><tr><td></td><td></td><td></td><td colspan="4">In Millions</td></tr><tr><td>Electric Utility</td><td>$ 303</td><td>$194</td><td>$109</td><td>$194</td><td>$271</td><td>$(77)</td></tr><tr><td>Gas Utility</td><td>127</td><td>96</td><td>31</td><td>96</td><td>89</td><td>7</td></tr><tr><td>Enterprises</td><td>36</td><td>(7)</td><td>43</td><td>(7)</td><td>13</td><td>(20)</td></tr><tr><td>Corporate Interest and Other</td><td>(119)</td><td>(85)</td><td>(34)</td><td>(85)</td><td>(90)</td><td>5</td></tr><tr><td>Discontinued Operations</td><td>(23)</td><td>20</td><td>(43)</td><td>20</td><td>1</td><td>19</td></tr><tr><td>Net Income Available to Common Stockholders</td><td>$ 324</td><td>$218</td><td>$106</td><td>$218</td><td>$284</td><td>$(66)</td></tr></table>

Presented in the following table are specific after-tax changes to net income available to common stockholders for 2010 versus 2009:

<table><tr><td rowspan="2"></td><td colspan="2">2010 Over/(Under) 2009</td></tr><tr><td>(In Millions)</td><td></td></tr><tr><td>Electric and gas rate orders</td><td>$ 90</td><td></td></tr><tr><td>Electric sales:</td><td></td><td></td></tr><tr><td>Weather</td><td>$ 52</td><td></td></tr><tr><td>Customer shift to energy-only rates and to ROA</td><td>(36)</td><td></td></tr><tr><td>Decoupling benefit</td><td>11</td><td>27</td></tr><tr><td>Gas sales, primarily weather</td><td></td><td>(14)</td></tr><tr><td>2009 net benefits, primarily asset sale gain and tax credit</td><td></td><td>(17)</td></tr><tr><td>Write-off of proposed coal-fueled plant cost</td><td></td><td>(14)</td></tr><tr><td>Other, mainly depreciation</td><td></td><td>(5)</td></tr><tr><td>Subsidiary earnings of enterprises segment</td><td></td><td>13</td></tr><tr><td>Cost of debt retirements and preferred stock redemptions, net</td><td></td><td>(20)</td></tr><tr><td>Interest expense</td><td></td><td>(9)</td></tr><tr><td>Other, mainly tax adjustments</td><td></td><td>(6)</td></tr><tr><td>2009 Big Rock decommissioning refund</td><td></td><td>79</td></tr><tr><td>Insurance settlement recovery</td><td></td><td>31</td></tr><tr><td>2009 gain on indemnity expiration</td><td></td><td>(31)</td></tr><tr><td>Other, including increase in Bay Harbor environmental liability</td><td></td><td>(18)</td></tr><tr><td>Total change</td><td></td><td>$106</td></tr></table>

Presented in the following table are specific after-tax changes to net income available to common stockholders for 2009 versus 2008:

<table><tr><td rowspan="2"></td><td colspan="2">2009 Over/(Under) 2008</td></tr><tr><td>(In Millions)</td><td></td></tr><tr><td>Electric and gas rate orders</td><td>$139</td><td></td></tr><tr><td>Electric and gas sales:</td><td></td><td></td></tr><tr><td>Weather</td><td>$(34)</td><td></td></tr><tr><td>Lower deliveries, mainly economic conditions</td><td>(14)</td><td>(48)</td></tr><tr><td>2008 net benefits, primarily sulfur dioxide credits</td><td></td><td>(23)</td></tr><tr><td>Plant maintenance expense</td><td></td><td>(20)</td></tr><tr><td>Pension and OPEB expenses</td><td></td><td>(19)</td></tr><tr><td>Forestry and tree trimming costs</td><td></td><td>(12)</td></tr><tr><td>Other, mainly higher property tax and interest expense</td><td></td><td>(19)</td></tr><tr><td>Subsidiary earnings of enterprises segment</td><td></td><td>5</td></tr><tr><td>Gain on early retirement of debt</td><td></td><td>7</td></tr><tr><td>Other, mainly tax adjustments</td><td></td><td>3</td></tr><tr><td>Big Rock decommissioning refund</td><td></td><td>(79)</td></tr><tr><td>Increase in Bay Harbor environmental liability</td><td></td><td>(22)</td></tr><tr><td>Gain on indemnity expiration</td><td></td><td>31</td></tr><tr><td>Other</td><td></td><td>(9)</td></tr><tr><td>Total change</td><td></td><td>$66</td></tr></table>



<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>Change</td><td>2009</td><td>2008</td><td>Change</td></tr><tr><td></td><td></td><td></td><td colspan="4">In Millions</td></tr><tr><td>Net Income Available to Common Stockholders</td><td>$303</td><td>$194</td><td>$109</td><td>$194</td><td>$271</td><td>$(77)</td></tr><tr><td>Reasons for the change:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Electric deliveries and rate increases</td><td></td><td></td><td>$266</td><td></td><td></td><td>$ (6)</td></tr><tr><td>Power supply costs and related revenue</td><td></td><td></td><td>(7)</td><td></td><td></td><td>(1)</td></tr><tr><td>Other income, net of expenses</td><td></td><td></td><td>(27)</td><td></td><td></td><td>14</td></tr><tr><td>Maintenance and other operating expenses</td><td></td><td></td><td>(59)</td><td></td><td></td><td>(77)</td></tr><tr><td>Depreciation and amortization</td><td></td><td></td><td>(9)</td><td></td><td></td><td>(2)</td></tr><tr><td>General taxes</td><td></td><td></td><td>2</td><td></td><td></td><td>(10)</td></tr><tr><td>Interest charges</td><td></td><td></td><td>23</td><td></td><td></td><td>(42)</td></tr><tr><td>Income taxes</td><td></td><td></td><td>(80)</td><td></td><td></td><td>47</td></tr><tr><td>Total change</td><td></td><td></td><td>$109</td><td></td><td></td><td>$(77)</td></tr></table>

Electric deliveries and rate increases: For 2010, electric delivery revenues increased $266 million compared with 2009. This variance included $84 million associated with favorable weather in 2010, offset partially by $40 million of decreased demand revenues and $19 million from lower customer usage. Additionally, revenues increased $32 million due to surcharges from MPSC orders allowing recovery of retirement benefit expenses, and $100 million from authorized rate increases in November 2010 and November 2009. Revenues also increased $99 million due to the absence of a refund ordered in 2009 related to the Big Rock decommissioning case. For more details regarding the Big Rock decommissioning order, see Note 6, Regulatory Matters. Other miscellaneous revenue increases totaled $10 million. Overall, deliveries to end-use customers were 37.7 billion kWh in 2010, an increase of 1.9 billion kWh or 5.3 percent compared with 2009.

For 2009, electric delivery revenues decreased $6 million compared with 2008. This variance resulted from $43 million associated with unfavorable weather in 2009, $10 million from lower customer usage, and $99 million from a refund order related to the Big Rock decommissioning case, offset largely by $146 million of additional revenues from authorized rate increases in June 2008 and November 2009. Overall, deliveries to end-use customers were 35.8 billion kWh in 2009, a decrease of 1.7 billion kWh or 4.5 percent compared with 2008.

Other income, net of expenses: For 2010, other income decreased $27 million compared with 2009, due primarily to a reduction of $8 million in interest income recorded on regulatory assets and the absence, in 2010, of $9 million of gains recognized on land sales in 2009.

For 2009, other income increased $14 million compared with 2008, due primarily to $9 million of gains recognized on land sales in 2009 and an $11 million impairment charge recorded on Consumers' SERP investments in 2008.

Maintenance and other operating expenses: For 2010, maintenance and other operating expenses increased $59 million compared with 2009. The increase was due primarily to higher retirement benefit expenses of $32 million and a $22 million impairment charge related to Consumers' decision to defer the development of its proposed coal-fueled plant.

For 2009, maintenance and other operating expenses increased $77 million compared with 2008. The increase was due primarily to $24 million of higher plant maintenance expenses, $23 million related to energy optimization program costs, and higher benefit expenses of $7 million. In addition, expenses increased $35 million in 2009 due to sulfur dioxide credits and RCP savings on Consumers' MCV PPA contract recorded in 2008.

Interest charges: For 2010, interest charges decreased $23 million compared with 2009. The decrease was due to the absence, in 2010, of $31 million of interest expense associated with the 2009 Big Rock decommissioning order, offset partially by an $8 million increase in other interest charges in 2010.

For 2009, interest charges increased $42 million compared with 2008, due to higher interest expense of $31 million associated with the Big Rock decommissioning order and an $11 million increase in other interest charges.



Income taxes: For 2010, income taxes increased $80 million compared with 2009, due to higher electric utility earnings. For 2009, income taxes decreased $47 million compared with 2008, due to lower electric utility earnings.

## Consumers' Gas Utility Results of Operations

<table><tr><td rowspan="2">Years Ended December 31</td><td rowspan="2">2010</td><td rowspan="2">2009</td><td colspan="2">Change</td><td rowspan="2">2009</td><td rowspan="2">Change</td></tr><tr><td colspan="2">In Millions</td></tr><tr><td>Net Income Available to Common Stockholders</td><td>$127</td><td>$96</td><td>$31</td><td>$96</td><td>$89</td><td>$7</td></tr><tr><td>Reasons for the change:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Gas deliveries and rate increases</td><td></td><td></td><td>$60</td><td></td><td></td><td>$29</td></tr><tr><td>Other income, net of expenses</td><td></td><td></td><td>(2)</td><td></td><td></td><td>13</td></tr><tr><td>Maintenance and other operating expenses</td><td></td><td></td><td>(7)</td><td></td><td></td><td>(32)</td></tr><tr><td>Depreciation and amortization</td><td></td><td></td><td>(4)</td><td></td><td></td><td>18</td></tr><tr><td>General taxes</td><td></td><td></td><td>2</td><td></td><td></td><td>(4)</td></tr><tr><td>Interest charges</td><td></td><td></td><td>(7)</td><td></td><td></td><td>(5)</td></tr><tr><td>Income taxes</td><td></td><td></td><td>(11)</td><td></td><td></td><td>(12)</td></tr><tr><td>Total change</td><td></td><td></td><td>$31</td><td></td><td></td><td>$7</td></tr></table>

Gas deliveries and rate increases: For 2010, gas delivery revenues increased $60 million compared with 2009, due primarily to additional revenues of $54 million from an authorized rate increase in May 2010. In addition, surcharge and other miscellaneous revenues increased $30 million. These increases were offset partially by a $24 million reduction due to unfavorable weather in 2010. Gas deliveries, including miscellaneous transportation to end-use customers, were 273.1 bcf in 2010, a decrease of 11.2 bcf or 3.9 percent compared with 2009.

For 2009, gas delivery revenues increased $29 million compared with 2008, due to additional revenues of $32 million from an authorized rate increase in December 2008 and a self-implemented rate increase in November 2009. In addition, surcharge and other miscellaneous revenues increased $28 million. These increases were offset by $10 million associated with unfavorable weather in 2009 and $21 million due to lower customer usage. Gas deliveries, including miscellaneous transportation to end-use customers, were 284.3 bcf in 2009, a decrease of 19.4 bcf or 6.4 percent compared with 2008.

Other income, net of expenses: Other income in 2010 was not materially different from other income in 2009.

For 2009, other income increased $13 million compared with 2008 due to $8 million of higher interest income on secured borrowing agreements and a $5 million impairment charge recorded on Consumers’ SERP investments in 2008.

Maintenance and other operating expenses: For 2010, maintenance and other operating expenses increased $7 million compared with 2009 due primarily to energy optimization program costs.

For 2009, maintenance and other operating expenses increased $32 million compared with 2008, due primarily to $14 million related to energy optimization program costs and higher benefit expenses of $12 million.

Depreciation and amortization: For 2010, depreciation and amortization expense increased $4 million compared with 2009, due primarily to increased plant in service. For 2009, depreciation and amortization expense decreased $18 million compared with 2008 due to the December 2008 gas rate order, which reduced depreciation expense.

Income taxes: For 2010, income taxes increased $11 million compared with 2009, and for 2009, income taxes increased $12 million compared with 2008. Both increases were due to higher gas utility earnings.

## ENTERPRISES RESULTS OF OPERATIONS

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>Change</td><td>2009</td><td>2008</td><td>Change</td></tr><tr><td></td><td></td><td></td><td colspan="4">In Millions</td></tr><tr><td>Net Income (Loss) Available to Common Stockholders</td><td>$36</td><td>$(7)</td><td>$43</td><td>$(7)</td><td>$13</td><td>$(20)</td></tr></table>



For 2010, the enterprises segment reported net income of $36 million, compared with a net loss of $7 million for 2009. The $43 million change reflected income of $31 million from the settlement of an insurance claim related to a previously sold asset and a $9 million tax benefit related to the Michigan Business Tax. Additionally, income increased $6 million due to higher gas and power sales offset partially by increased maintenance and other operating expenses. These increases were offset by a $3 million decrease associated with Bay Harbor; in 2010, the enterprises segment recorded a $25 million after-tax increase in the environmental remediation liability associated with Bay Harbor, compared with a $22 million after-tax increase in 2009. For more details regarding Bay Harbor, see Note 5, Contingencies and Commitments.

For 2009, the enterprises segment reported a net loss of $7 million compared with net income of $13 million for 2008. The $20 million change was due primarily to a $22 million after-tax increase in the environmental remediation liability associated with Bay Harbor.

## CORPORATE INTEREST AND OTHER RESULTS OF OPERATIONS

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>Change</td><td>2009</td><td>2008</td><td>Change</td></tr><tr><td></td><td></td><td></td><td colspan="4">In Millions</td></tr><tr><td>Net Loss Available to Common Stockholders</td><td>$ (119)</td><td>$ (85)</td><td>$ (34)</td><td>$ (85)</td><td>$ (90)</td><td>$ 5</td></tr></table>

For 2010, corporate interest and other net expenses increased $34 million compared with 2009, reflecting an $18 million gain recognized in 2009 on the early retirement of long-term debt — related parties and $15 million due primarily to higher tax expense in 2010 related to the Michigan Business Tax. Additionally, interest expense increased $10 million due to higher debt levels at higher average interest rates. These items were offset partially by $9 million of higher net earnings at EnerBank and lower legal fees.

For 2009, corporate interest and other net expenses decreased $5 million, reflecting an $18 million gain on the early retirement of long-term debt — related parties, offset partially by $11 million in premiums paid on the early retirement of senior notes.

## Discontinued Operations

For 2010, a loss of $23 million was recorded from discontinued operations, compared with income of $20 million for 2009. The $43 million change was due primarily to a $28 million gain recognized in 2009 on the expiration of an indemnity for a 2007 asset sale and $10 million of additional tax expense in 2010 resulting from an IRS audit adjustment related to a 2003 asset sale.

For 2009, income of $20 million was recorded from discontinued operations, compared with income of $1 million for 2008. The $19 million change was due primarily to a $28 million gain on the expiration of an indemnity for a 2007 asset sale, offset partially by a loss of $8 million, reflecting operating results at Exeter.

## Cash Position, Investing, and Financing

At December 31, 2010, CMS Energy had $270 million of consolidated cash and cash equivalents, which included $23 million of restricted cash and cash equivalents. At December 31, 2010, Consumers had $94 million of consolidated cash and cash equivalents, which included $23 million of restricted cash and cash equivalents.



## OPERATING ACTIVITIES

Presented in the following table are specific components of net cash provided by operating activities for the years ended December 31, 2010 and 2009:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>Change</td></tr><tr><td></td><td></td><td>In Millions</td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>• Net income</td><td>$ 343</td><td>$ 240</td><td>$ 103</td></tr><tr><td>• Non-cash transactions(a)</td><td>1,112</td><td>877</td><td>235</td></tr><tr><td></td><td>$1,455</td><td>$1,117</td><td>$ 338</td></tr><tr><td>• Sale of gas purchased in the prior year</td><td>756</td><td>845</td><td>(89)</td></tr><tr><td>• Purchase of gas in the current year</td><td>(663)</td><td>(718)</td><td>55</td></tr><tr><td>• Accounts receivable sales, net</td><td>(50)</td><td>(120)</td><td>70</td></tr><tr><td>• Postretirement benefits contributions</td><td>(463)</td><td>(262)</td><td>(201)</td></tr><tr><td>• Change in other core working capital(b)</td><td>(22)</td><td>(62)</td><td>40</td></tr><tr><td>• Other changes in assets and liabilities, net</td><td>(54)</td><td>48</td><td>(102)</td></tr><tr><td>Net cash provided by operating activities</td><td>$ 959</td><td>$ 848</td><td>$ 111</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>• Net income</td><td>$ 434</td><td>$ 293</td><td>$ 141</td></tr><tr><td>• Non-cash transactions(a)</td><td>1,103</td><td>841</td><td>262</td></tr><tr><td></td><td>$1,537</td><td>$1,134</td><td>$ 403</td></tr><tr><td>• Sale of gas purchased in the prior year</td><td>756</td><td>845</td><td>(89)</td></tr><tr><td>• Purchase of gas in the current year</td><td>(663)</td><td>(718)</td><td>55</td></tr><tr><td>• Accounts receivable sales, net</td><td>(50)</td><td>(120)</td><td>70</td></tr><tr><td>• Postretirement benefits contributions</td><td>(447)</td><td>(254)</td><td>(193)</td></tr><tr><td>• Change in other core working capital(b)</td><td>(19)</td><td>(58)</td><td>39</td></tr><tr><td>• Other changes in assets and liabilities, net</td><td>(204)</td><td>93</td><td>(297)</td></tr><tr><td>Net cash provided by operating activities</td><td>$ 910</td><td>$ 922</td><td>$ (12)</td></tr></table>

(a) Non-cash transactions comprise depreciation and amortization, changes in deferred income taxes, postretirement benefits expense, and other non-cash items.

(b) Other core working capital comprises other changes in accounts receivable and accrued revenues, inventories, and accounts payable.

For the year ended December 31, 2010, net cash provided by operating activities at CMS Energy increased $111 million compared with 2009. The increase was due primarily to higher net income, net of non-cash transactions, offset partially by higher pension contributions.

For the year ended December 31, 2010, net cash provided by operating activities at Consumers decreased $12 million compared with 2009. The decrease was due primarily to higher pension contributions and refunds to customers. These changes were offset largely by increased billings due to recent regulatory actions.



Presented in the following table are specific components of net cash provided by operating activities for the years ended December 31, 2009 and 2008:

<table><tr><td>Years Ended December 31</td><td>2009</td><td>2008</td><td>Change</td></tr><tr><td></td><td></td><td>In Millions</td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>• Net income</td><td>$ 240</td><td>$ 302</td><td>$ (62)</td></tr><tr><td>• Non-cash transactions(a)</td><td>877</td><td>911</td><td>(34)</td></tr><tr><td></td><td>$1,117</td><td>$1,213</td><td>$ (96)</td></tr><tr><td>• Sale of gas purchased in the prior year</td><td>845</td><td>915</td><td>(70)</td></tr><tr><td>• Purchase of gas in the current year</td><td>(718)</td><td>(963)</td><td>245</td></tr><tr><td>• Electric sales contract termination payment</td><td>—</td><td>(275)</td><td>275</td></tr><tr><td>• Accounts receivable sales, net</td><td>(120)</td><td>170</td><td>(290)</td></tr><tr><td>• Postretirement benefits contributions</td><td>(262)</td><td>(51)</td><td>(211)</td></tr><tr><td>• Change in other core working capital(b)</td><td>(62)</td><td>(278)</td><td>216</td></tr><tr><td>• Other changes in assets and liabilities, net</td><td>48</td><td>(174)</td><td>222</td></tr><tr><td>Net cash provided by operating activities</td><td>$ 848</td><td>$ 557</td><td>$ 291</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>• Net income</td><td>$ 293</td><td>$ 364</td><td>$ (71)</td></tr><tr><td>• Non-cash transactions(a)</td><td>841</td><td>956</td><td>(115)</td></tr><tr><td></td><td>$1,134</td><td>$1,320</td><td>$ (186)</td></tr><tr><td>• Sale of gas purchased in the prior year</td><td>845</td><td>915</td><td>(70)</td></tr><tr><td>• Purchase of gas in the current year</td><td>(718)</td><td>(963)</td><td>245</td></tr><tr><td>• Accounts receivable sales, net</td><td>(120)</td><td>170</td><td>(290)</td></tr><tr><td>• Postretirement benefits contributions</td><td>(254)</td><td>(50)</td><td>(204)</td></tr><tr><td>• Change in other core working capital(b)</td><td>(58)</td><td>(289)</td><td>231</td></tr><tr><td>• Other changes in assets and liabilities, net</td><td>93</td><td>(230)</td><td>323</td></tr><tr><td>Net cash provided by operating activities</td><td>$ 922</td><td>$ 873</td><td>$ 49</td></tr></table>

(a) Non-cash transactions comprise depreciation and amortization, changes in deferred income taxes, postretirement benefits expense, and other non-cash items.

(b) Other core working capital comprises other changes in accounts receivable and accrued revenues, inventories, and accounts payable.

For the year ended December 31, 2009, net cash provided by operating activities at CMS Energy increased $291 million compared with 2008. This increase was due primarily to the absence in 2009 of a payment made by CMS ERM in 2008 to terminate electricity sales agreements and the changes affecting Consumers' cash provided by operating activities described in the following paragraph.

For the year ended December 31, 2009, net cash provided by operating activities at Consumers increased $49 million compared with 2008. This increase was due primarily to the impact of lower gas prices on inventory purchased in 2009, increased billings due to recent regulatory actions, the absence, in 2009, of refunds to customers of excess Palisades decommissioning funds, and other timing differences. These changes were offset partially by the pension contribution of $199 million and lower sales of accounts receivable in 2009.



## Investing Activities

Presented in the following table are specific components of cash used in investing activities for the years ended December 31, 2010 and 2009:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>Change</td></tr><tr><td></td><td></td><td>In Millions</td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>• Capital expenditures</td><td>$ (821)</td><td>$(818)</td><td>$ (3)</td></tr><tr><td>• Cash effect of deconsolidation of partnerships</td><td>(10)</td><td>—</td><td>(10)</td></tr><tr><td>• Increase in loans and notes receivable</td><td>(131)</td><td>(83)</td><td>(48)</td></tr><tr><td>• Costs to retire property and other</td><td>(41)</td><td>(34)</td><td>(7)</td></tr><tr><td>Net cash used in investing activities</td><td>$(1,003)</td><td>$ (935)</td><td>$(68)</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>• Capital expenditures</td><td>$ (815)</td><td>$(811)</td><td>$ (4)</td></tr><tr><td>• Costs to retire property and other</td><td>(44)</td><td>(39)</td><td>(5)</td></tr><tr><td>Net cash used in investing activities</td><td>$ (859)</td><td>$ (850)</td><td>$ (9)</td></tr></table>

For the year ended December 31, 2010, net cash used in investing activities at CMS Energy increased $68 million compared with 2009. The change was due primarily to an increase in EnerBank consumer lending. For the year ended December 31, 2010, net cash used in investing activities at Consumers increased $9 million compared with 2009, due to increases in capital expenditures and costs to retire property.

Presented in the following table are specific components of cash used in investing activities for the years ended December 31, 2009 and 2008:

<table><tr><td>Years Ended December 31</td><td>2009</td><td>2008</td><td>Change</td></tr><tr><td></td><td></td><td>In Millions</td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>• Capital expenditures</td><td>$ (818)</td><td>$ (792)</td><td>$ (26)</td></tr><tr><td>• Increase in non-current notes receivable</td><td>(83)</td><td>(19)</td><td>(64)</td></tr><tr><td>• Costs to retire property and other</td><td>(34)</td><td>(28)</td><td>(6)</td></tr><tr><td>Net cash used in investing activities</td><td>$ (935)</td><td>$ (839)</td><td>$ (96)</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>• Capital expenditures</td><td>$ (811)</td><td>$ (789)</td><td>$ (22)</td></tr><tr><td>• Costs to retire property and other</td><td>(39)</td><td>(34)</td><td>(5)</td></tr><tr><td>Net cash used in investing activities</td><td>$ (850)</td><td>$ (823)</td><td>$ (27)</td></tr></table>

For the year ended December 31, 2009, net cash used in investing activities at CMS Energy increased $96 million compared with 2008. For the year ended December 31, 2009, net cash used in investing activities at Consumers increased $27 million compared with 2008. The increases at CMS Energy were due primarily to increases in EnerBank consumer lending and in Consumers' capital expenditures.



## Financing Activities

Presented in the following table are specific components of net cash provided by (used in) financing activities for the years ended December 31, 2010 and 2009:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>Change</td></tr><tr><td></td><td></td><td>In Millions</td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>• Issuance of FMBs, convertible senior notes, senior notes, and other debt . .</td><td>$ 1,704</td><td>$ 1,374</td><td>$ 330</td></tr><tr><td>• Retirement of debt and other debt maturity payments . .</td><td>(1,033)</td><td>(1,271)</td><td>238</td></tr><tr><td>• Payments of common and preferred stock dividends . .</td><td>(162)</td><td>(125)</td><td>(37)</td></tr><tr><td>• Redemption of preferred stock . .</td><td>(239)</td><td>(4)</td><td>(235)</td></tr><tr><td>• Changes in EnerBank notes payable . .</td><td>(40)</td><td>40</td><td>(80)</td></tr><tr><td>• Other financing activities . .</td><td>(28)</td><td>(49)</td><td>21</td></tr><tr><td>Net cash provided by (used in) financing activities . .</td><td>$ 202</td><td>$ (35)</td><td>$ 237</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>• Issuance of FMBs . .</td><td>$ 600</td><td>$ 500</td><td>$ 100</td></tr><tr><td>• Retirement of debt and other debt maturity payments . .</td><td>(482)</td><td>(387)</td><td>(95)</td></tr><tr><td>• Payments of common and preferred stock dividends . .</td><td>(360)</td><td>(287)</td><td>(73)</td></tr><tr><td>• Stockholder&#x27;s contribution from CMS Energy . .</td><td>250</td><td>100</td><td>150</td></tr><tr><td>• Other financing activities . .</td><td>(27)</td><td>(28)</td><td>1</td></tr><tr><td>Net cash used in financing activities . .</td><td>$ (19)</td><td>$ (102)</td><td>$ 83</td></tr></table>

For the year ended December 31, 2010, net cash provided by financing activities at CMS Energy increased $237 million compared to 2009. The change was due primarily to an increase in net proceeds from borrowings by CMS Energy, offset partially by a decrease in borrowings by EnerBank.

For the year ended December 31, 2010, net cash used in financing activities at Consumers decreased $83 million compared with 2009. The change was due primarily to a stockholder’s contribution from CMS Energy, offset partially by an increase in common dividend payments.

Presented in the following table are specific components of net cash provided by (used in) financing activities for the years ended December 31, 2009 and 2008:

<table><tr><td>Years Ended December 31</td><td>2009</td><td>2008</td><td>Change</td></tr><tr><td></td><td></td><td>In Millions</td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>• Issuance of FMBs, convertible senior notes, senior notes, and other debt . .</td><td>$ 1,374</td><td>$ 1,396</td><td>$ (22)</td></tr><tr><td>• Retirement of debt and other debt maturity payments . .</td><td>(1,271)</td><td>(1,130)</td><td>(141)</td></tr><tr><td>• Payments of common and preferred stock dividends . .</td><td>(125)</td><td>(93)</td><td>(32)</td></tr><tr><td>• Changes in EnerBank notes payable . .</td><td>40</td><td>—</td><td>40</td></tr><tr><td>• Other financing activities . .</td><td>(53)</td><td>(26)</td><td>(27)</td></tr><tr><td>Net cash provided by (used in) financing activities . .</td><td>$ (35)</td><td>$ 147</td><td>$(182)</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>• Issuance of FMBs . .</td><td>$ 500</td><td>$ 600</td><td>$ (100)</td></tr><tr><td>• Retirement of debt and other debt maturity payments . .</td><td>(387)</td><td>(444)</td><td>57</td></tr><tr><td>• Payments of common and preferred stock dividends . .</td><td>(287)</td><td>(299)</td><td>12</td></tr><tr><td>• Stockholder&#x27;s contribution from CMS Energy . .</td><td>100</td><td>—</td><td>100</td></tr><tr><td>• Other financing activities . .</td><td>(28)</td><td>(33)</td><td>5</td></tr><tr><td>Net cash used in financing activities . .</td><td>$ (102)</td><td>$ (176)</td><td>$ 74</td></tr></table>

For the year ended December 31, 2009, net cash used in financing activities at CMS Energy increased by $182 million compared with 2008. The increase in net cash used in financing activities was due primarily to an increase in net debt retirements.



For the year ended December 31, 2009, net cash used in financing activities at Consumers decreased $74 million compared with 2008. This decrease was due primarily to a stockholder's contribution from CMS Energy, offset partially by a decrease in net proceeds from borrowings.

For additional details on long-term debt activity, see Note 7, Financings and Capitalization.

## CAPITAL RESOURCES AND LIQUIDITY

CMS Energy uses dividends from its subsidiaries and external financing and capital transactions to invest in its utility and non-utility businesses, retire debt, pay dividends, and fund its other obligations. The ability of CMS Energy’s subsidiaries, including Consumers, to pay dividends to CMS Energy depends upon each subsidiary’s revenues, earnings, cash needs, and other factors. In addition, Consumers’ ability to pay dividends is restricted by certain terms included in its articles of incorporation, as well as by FERC requirements. For the year ended December 31, 2010, Consumers paid $358 million in common stock dividends to CMS Energy.

Consumers uses cash flows generated from operations and external financing transactions, as well as stockholder’s contributions from CMS Energy, to fund capital expenditures, retire debt, pay dividends, contribute to its employee benefit plans, and fund its other obligations.

CMS Energy’s and Consumers’ access to the financial and capital markets depends on their credit ratings and on market conditions. As evidenced by past financing transactions, CMS Energy and Consumers have had ready access to these markets and, barring major market dislocations or disruptions, they expect to continue to have such access. If access to these markets were to become diminished or otherwise restricted, however, CMS Energy and Consumers would implement contingency plans to address debt maturities, which could include reduced capital spending. CMS Energy and Consumers also have the following secured revolving credit facilities available:

<table><tr><td>At December 31, 2010</td><td>Amount of Facility</td><td>Amount Available In Millions</td><td>Expiration Date</td></tr><tr><td>CMS ENERGY</td><td></td><td></td><td></td></tr><tr><td>Revolving credit facility</td><td>$550</td><td>$547</td><td>April 2012</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Revolving credit facility</td><td>500</td><td>200</td><td>March 2012</td></tr><tr><td>Revolving credit facility</td><td>150</td><td>150</td><td>August 2013</td></tr></table>

CMS Energy and Consumers presently use these credit facilities to issue letters of credit, and they intend to renew these facilities at reasonable terms before their expiration. An additional source of liquidity is Consumers' revolving accounts receivable sales program, which allows it to transfer up to $250 million of accounts receivable as a secured borrowing. At December 31, 2010, $250 million of account receivable were eligible for transfer under this program.

Certain of CMS Energy’s and Consumers’ credit agreements and debt indentures contain covenants that require CMS Energy and Consumers to maintain certain financial ratios. CMS Energy’s $550 million revolving credit agreement specifies a maximum debt to EBITDA ratio, as defined therein, and a minimum interest coverage ratio, as defined therein. Also, certain of CMS Energy’s senior notes indenture supplements specify a minimum interest coverage ratio, as defined therein. Consumers’ revolving credit agreements specify a maximum debt to capital ratio, as defined therein. At December 31, 2010, no events of default had occurred with respect to any debt covenants contained in CMS Energy and Consumers’ credit agreements or debt indentures. CMS Energy and Consumers were each in compliance with these limits as of December 31, 2010, as presented in the following table:

<table><tr><td>Credit agreement or facility</td><td>Description</td><td>(1)Minimum (2)Maximum Limit</td><td>Ratio at December 31, 2010</td></tr><tr><td>CMS Energy’s revolving credit agreement</td><td>Debt to EBITDA</td><td>(2)7.0 to 1.0</td><td>4.70 to 1.0</td></tr><tr><td>CMS Energy’s revolving credit agreement</td><td>Interest Coverage</td><td>(1)1.2 to 1.0</td><td>3.62 to 1.0</td></tr><tr><td>CMS Energy’s senior notes indenture</td><td>Interest Coverage</td><td>(1)1.7 to 1.0</td><td>3.70 to 1.0</td></tr><tr><td>Consumers’ revolving credit agreements</td><td>Debt to Capital</td><td>(2)0.7 to 1.0</td><td>0.51 to 1.0</td></tr></table>



Components of CMS Energy’s and Consumers’ cash management plan include controlling operating expenses and capital expenditures and evaluating market conditions for financing and refinancing opportunities. CMS Energy and Consumers believe that their present level of cash and their expected cash flows from operating activities, together with their access to sources of liquidity, will be sufficient to fund their contractual obligations for 2011 and beyond.

Contractual Obligations: Presented in the following table are CMS Energy’s and Consumers’ contractual cash obligations for each of the periods presented. The table excludes all amounts classified as current liabilities on CMS Energy’s and Consumers’ Consolidated Balance Sheets, other than the current portion of long-term debt and capital and finance leases.

<table><tr><td rowspan="2">At December 31, 2010</td><td rowspan="2">Total</td><td colspan="4">Payments Due</td></tr><tr><td>Less Than One Year</td><td>One to Three Years In Millions</td><td>Three to Five Years</td><td>More Than Five Years</td></tr><tr><td>CMS Energy, including Consumers</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Long-term debt(a)</td><td>$ 7,206</td><td>$ 439</td><td>$1,019</td><td>$ 976</td><td>$ 4,772</td></tr><tr><td>Interest payments on long-term debt(b)</td><td>2,909</td><td>357</td><td>662</td><td>587</td><td>1,303</td></tr><tr><td>Capital and finance leases(c)</td><td>212</td><td>23</td><td>50</td><td>42</td><td>97</td></tr><tr><td>Interest payments on capital and finance leases(d)</td><td>98</td><td>14</td><td>22</td><td>18</td><td>44</td></tr><tr><td>Operating leases(e)</td><td>260</td><td>29</td><td>57</td><td>51</td><td>123</td></tr><tr><td>Purchase obligations(f)</td><td>15,794</td><td>1,996</td><td>2,613</td><td>1,751</td><td>9,434</td></tr><tr><td>Purchase obligations — related parties(f)</td><td>1,735</td><td>87</td><td>180</td><td>193</td><td>1,275</td></tr><tr><td>Total contractual obligations</td><td>$28,214</td><td>$2,945</td><td>$4,603</td><td>$3,618</td><td>$17,048</td></tr><tr><td>Consumers</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Long-term debt(a)</td><td>$ 4,529</td><td>$ 37</td><td>$ 755</td><td>$ 567</td><td>$ 3,170</td></tr><tr><td>Interest payments on long-term debt(b)</td><td>1,899</td><td>238</td><td>436</td><td>365</td><td>860</td></tr><tr><td>Capital and finance leases(c)</td><td>212</td><td>23</td><td>50</td><td>42</td><td>97</td></tr><tr><td>Interest payments on capital and finance leases(d)</td><td>98</td><td>14</td><td>22</td><td>18</td><td>44</td></tr><tr><td>Operating leases(e)</td><td>260</td><td>29</td><td>57</td><td>51</td><td>123</td></tr><tr><td>Purchase obligations(f)</td><td>15,794</td><td>1,996</td><td>2,613</td><td>1,751</td><td>9,434</td></tr><tr><td>Purchase obligations — related parties(f)</td><td>1,735</td><td>87</td><td>180</td><td>193</td><td>1,275</td></tr><tr><td>Total contractual obligations</td><td>$24,527</td><td>$2,424</td><td>$4,113</td><td>$2,987</td><td>$15,003</td></tr></table>

(a) Principal amounts due on outstanding debt obligations, current and long-term, at December 31, 2010. For additional details on long-term debt, see Note 7, Financings and Capitalization.

(b) Scheduled interest payments on both variable-rate and fixed-rate long-term debt, current and long-term. Variable interest payments are based on contractual rates in effect at December 31, 2010.

(c) Principal portion of lease payments under capital and finance leases, comprising mainly leased service vehicles and certain PPAs.

(d) Imputed interest on capital and finance leases.

(e) Minimum noncancelable lease payments under leases of railroad cars and miscellaneous office buildings and equipment, which are accounted for as operating leases.

(f) Long-term contracts for purchase of commodities and services. These obligations include operating contracts used for the purchase of capacity and energy from PURPA qualifying facilities. These commodities and services include natural gas and associated transportation, electricity, and coal and associated transportation.

For details related to benefit payments, see Note 11, Retirement Benefits.



Off-Balance-Sheet Arrangements: CMS Energy, Consumers, and certain of their subsidiaries also enter into various arrangements in the normal course of business to facilitate commercial transactions with third parties. These arrangements include indemnities, surety bonds, letters of credit, and financial and performance guarantees. Indemnities are usually agreements to reimburse a counterparty that may incur losses due to outside claims or breach of contract terms. The maximum payment that could be required under a number of these indemnity obligations is not estimable. While CMS Energy and Consumers believe it is unlikely that they will incur any material losses related to indemnities they have not recorded as liabilities, they cannot predict the impact of these contingent obligations on their liquidity and financial condition. For additional details on these and other guarantee arrangements, see Note 5, Contingencies and Commitments, “Guarantees.”

Capital Expenditures: Over the next five years, CMS Energy and Consumers expect to make capital investments of more than $6 billion. CMS Energy and Consumers may revise their forecasts of capital expenditures periodically due to a number of factors, including environmental regulations, business opportunities, market volatility, economic trends, and the ability to access capital. Presented in the following table are CMS Energy’s and Consumers’ estimated capital expenditures, including lease commitments, for 2011 through 2015:

<table><tr><td></td><td>2011</td><td>2012</td><td>2013</td><td>2014</td><td>2015</td><td>Five Years Total</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td>In Millions</td><td></td><td></td></tr><tr><td>Consumers</td><td>$1,070</td><td>$1,290</td><td>$1,280</td><td>$1,530</td><td>$1,260</td><td>$6,430</td></tr><tr><td>Enterprises</td><td>6</td><td>8</td><td>1</td><td>1</td><td>1</td><td>17</td></tr><tr><td>Total CMS Energy</td><td>$1,076</td><td>$1,298</td><td>$1,281</td><td>$1,531</td><td>$1,261</td><td>$6,447</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Electric utility operations(a)(b)</td><td>$ 790</td><td>$1,060</td><td>$1,060</td><td>$1,310</td><td>$1,030</td><td>$5,250</td></tr><tr><td>Gas utility operations(b)</td><td>280</td><td>230</td><td>220</td><td>220</td><td>230</td><td>1,180</td></tr><tr><td>Total Consumers</td><td>$1,070</td><td>$1,290</td><td>$1,280</td><td>$1,530</td><td>$1,260</td><td>$6,430</td></tr></table>

(a) These amounts include estimates for capital expenditures that may be required by environmental laws, regulations, or potential consent decrees.

(b) These amounts include estimates for capital expenditures related to information technology projects, facility improvements, and vehicle leasing.



Presented in the following illustration are the components of CMS Energy’s (including Consumers’) planned capital spending for 2011 through 2015:



## OUTLOOK

Several business trends and uncertainties may affect CMS Energy’s and Consumers’ financial condition and results of operations. These trends and uncertainties could have a material impact on CMS Energy’s and Consumers’ consolidated income, cash flows, or financial position. For additional details regarding these and other uncertainties, see “Forward-Looking Statements and Information;” Note 5, Contingencies and Commitments; and Part I, Item 1A. Risk Factors.

## CONSUMERS' ELECTRIC UTILITY BUSINESS OUTLOOK AND UNCERTAINTIES

Balanced Energy Initiative: Consumers’ balanced energy initiative is a comprehensive energy resource plan designed to meet its projected short-term and long-term electric power requirements through:

• energy efficiency;

• demand management;

• expanded use of renewable energy;

• development of new power plants;

• pursuit of additional PPAs to complement existing generating sources;

• continued operation of existing units; and

• potential retirement or mothballing of older generating units.

In May 2010, Consumers announced plans to defer the development of its proposed 830 MW coal-fueled plant at its Karn/Weadock generating complex. This decision reflects reduced customer demand for electricity due to the recession, forecasted lower natural gas prices due to recent developments in shale gas recovery technology, and projected surplus generating capacity in the MISO market. Consumers has been monitoring customer demand, fuel and power prices, and other market conditions, and has not set a timetable for a future decision about the project; however, the likelihood that the plant will be constructed has diminished significantly. Consumers’ alternatives to



constructing the proposed coal-fueled plant include constructing new gas-fueled generation, relying on additional market purchases, as well as continued operation of several existing generating units.

Renewable Energy Plan: Consumers’ renewable energy plan details how Consumers will meet REC and capacity standards prescribed by the 2008 Energy Legislation. This legislation requires Consumers to obtain RECs in an amount equal to at least ten percent of its electric sales volume (estimated to be 3.6 million RECs annually) by 2015. RECs represent proof that the associated electricity was generated from a renewable energy resource. The legislation also requires Consumers to obtain 500 MW of capacity from renewable energy resources by 2015, either through generation resources owned by Consumers or through agreements to purchase capacity from other parties.

Under its renewable energy plan, Consumers expect to secure its required RECs each year with a combination of newly generated RECs and previously generated RECs carried over from prior years. Presently, Consumers generates or purchases 1.6 million RECs per year, which represents 44 percent of the 2015 renewable energy requirement. In 2010, Consumers contracted for the purchase of 900,000 RECs per year, which represents an additional 25 percent of the 2015 renewable energy requirement. In addition, at December 2010, Consumers held three million RECs in inventory for use over the next 15 years beginning in 2015. This inventory will provide 200,000 RECs per year, or 5.5 percent of the 2015 renewable energy requirement.

To meet its renewable capacity requirements, Consumers expects to add more than 500 MW of owned or contracted renewable capacity by 2015. Through December 2010, Consumers has contracted for the purchase of 296 MW of nameplate capacity from renewable energy suppliers, which represents 59 percent of the 2015 renewable capacity requirement.

Consumers has secured more than 79,000 acres of land easements in Michigan’s Huron, Mason, and Tuscola Counties for the potential development of wind generation, and is presently collecting wind speed and other meteorological data at those sites. Consumers has entered into construction and supply contracts as well as a contract to purchase wind turbine generators for the construction of a 100-MW wind farm in Mason County, the Lake Winds Energy Park, which Consumers expects to be operational in late 2012. Consumers will continue to seek opportunities for wind generation development in support of the renewable capacity standards.

Electric Customer Deliveries and Revenue: Consumers’ electric customer deliveries are largely dependent on Michigan’s economy, which has suffered from economic and financial instability in the automotive and real estate sectors.

Consumers expects weather-adjusted electric deliveries to increase in 2011 by two percent compared with 2010. Consumers’ outlook for 2011 includes continuing growth in deliveries to its largest customer, which produces energy-related and computer components. Consumers has a long-term contract with this customer to provide electricity at a discounted rate for economic development purposes. Excluding this customer’s growth, Consumers expects weather-adjusted electric deliveries in 2011 to be at a similar level to 2010. Consumers’ outlook reflects the impact of reduced deliveries associated with its investment in energy efficiency programs prescribed by the 2008 Energy Legislation, as well as recent projections of Michigan’s economic conditions.

Consumers believes economic conditions have stabilized. Consumers’ present outlook for electric delivery growth is about 1.5 percent annually on average through 2016. This reflects growth in electric deliveries offset by the predicted effects of energy efficiency programs and appliance efficiency standards. Actual deliveries will depend on:

• energy conservation measures and results of energy efficiency programs;

• fluctuations in weather; and

• changes in economic conditions, including utilization and expansion or contraction of manufacturing facilities, population trends, and housing activity.

A decoupling mechanism, authorized by the MPSC in Consumers’ 2009 electric rate case order and extended in the 2010 electric rate case order, allows Consumers to adjust future electric rates to compensate for changes in sales volumes resulting from weather fluctuations, energy efficiency, and conservation. Consumers expect this mechanism to reduce volatility of electric utility revenue.



Electric ROA: The Customer Choice Act allows all of Consumers' electric customers to buy electric generation service from Consumers or from an alternative electric supplier. The 2008 Energy Legislation revised the Customer Choice Act by limiting alternative electric supply to ten percent of Consumers' weather-adjusted retail sales of the preceding calendar year. At December 31, 2010, electric deliveries under the ROA program were at the ten percent limit and alternative electric suppliers were providing 807 MW of generation service to ROA customers. Based on 2010 weather-adjusted retail sales, Consumers expects 2011 electric deliveries under the ROA program to be at a similar level to 2010.

In May 2010, a bill was introduced to the Michigan Senate and House of Representatives that would increase from ten percent to 25 percent the proportion of an electric utility’s sales for which service may be provided by an alternative electric supplier. The 2010 legislative session ended without any definitive action being taken on this bill.

Electric Environmental Estimates: Consumers’ operations are subject to various state and federal environmental laws and regulations. Consumers continue to focus on complying with the Clean Air Act, Clean Water Act, and numerous state and federal environmental regulations. Consumers estimate that it will incur expenditures of $1.9 billion from 2011 through 2018 to comply with these regulations. Consumers expect to recover these costs in customer rates, but cannot guarantee this result. Consumers’ primary environmental compliance focus includes, but is not limited to, the following matters:

Clean Air Interstate Rule/Clean Air Transport Rule: Due to a December 2008 court decision that remanded CAIR back to the EPA, CAIR remains in effect at this time, pending the EPA’s finalization of a new rule. In July 2010, the EPA released CATR, a proposed rule that would replace CAIR. Consumers is evaluating this proposed rule. If adopted in its present form, CATR could result in additional or accelerated environmental compliance costs related to Consumers’ fossil-fueled power plants and retirement of some or all of the older, smaller generating units in Consumers’ fleet. Presently, Consumers’ strategy to comply with CAIR involves the installation of state-of-the-art emission control equipment.

Federal Hazardous Air Pollutant Regulation: The EPA is developing Maximum Achievable Control Technology emission standards for electric generating units, based on Section 112 of the Clean Air Act. Consumers is unable to predict the impact of this proposed regulation, but expects to have a better understanding of the potential impact upon the release a proposed rule, which is expected in March 2011. Existing sources must meet the standards generally within three years of issuance of the final rule. The final rule is expected to be issued in November 2011.

Greenhouse Gases: There are numerous legislative and regulatory initiatives at the state, regional, and national levels that involve the regulation of greenhouse gases. Consumers monitors and comments on these initiatives and also follows litigation involving greenhouse gases. Consumers believes Congress may eventually pass greenhouse gas legislation, but is unable to predict the form and timing of any final legislation.

In May 2010, the EPA released its Prevention of Significant Deterioration and Title V Greenhouse Gas Tailoring Rule. The final rule, which numerous parties have challenged in the U.S. Court of Appeals for the D.C. Circuit, sets limits for greenhouse gas emissions that define when permits are required for new and existing industrial facilities under NSR PSD and Title V Operating Permit programs. Consumers does not expect that this regulation will require it to incur significant expenditures for efficiency upgrades for modified or new facilities at this time.

Litigation, as well as federal laws, EPA regulations regarding greenhouse gases, or similar treaties, state laws, or rules, if enacted, could require Consumers to replace equipment, install additional equipment for emission controls, purchase emission allowances, curtail operations, arrange for alternative sources of supply, or take other steps to manage or lower the emission of greenhouse gases. Although associated capital or operating costs relating to greenhouse gas regulation or legislation could be material and cost recovery cannot be assured, Consumers expect to recover these costs and capital expenditures in rates consistent with the recovery of other reasonable costs of complying with environmental laws and regulations.

In 2010, carbon dioxide emissions from fossil-fueled power plants owned by Consumers, excluding the portion of Campbell Unit 3 that is owned by others, exceeded 18 million metric tons. During the same period, coal-fueled plants owned by the enterprises segment emitted about 700,000 metric tons of carbon dioxide.



Coal Combustion By-Products: In June 2010, the EPA proposed rules regulating CCBs, such as coal ash, under the Resource Conservation and Recovery Act. Michigan already regulates CCBs as low-hazard industrial waste. The EPA proposed a range of alternatives for regulating CCBs, including regulation as either a non-hazardous waste or a hazardous waste. If coal ash were regulated as a hazardous waste, Consumers would likely cease the beneficial re-use of this product, resulting in significantly more coal ash requiring costly disposal. Additionally, it is possible that existing coal ash disposal areas could be closed and costly alternative arrangements for coal ash disposal could be required if the upgrades to hazardous waste landfill standards are economically prohibitive. Consumers is unable to predict accurately the full impacts from this wide range of possible outcomes, but significant expenditures are likely.

Water: In 2004, the EPA issued rules that govern existing electric generating plant cooling water intake systems. These rules require a significant reduction in the number of fish harmed by cooling water intake structures at existing power plants. The EPA compliance options in the rule were challenged before the U.S. Court of Appeals for the Second Circuit, which remanded the bulk of the rule back to the EPA for reconsideration in 2007. In April 2009, the U.S. Supreme Court ruled in favor of the utility industry’s position that the EPA can rely on a cost-benefit analysis in setting the national performance standards for fish protection. The EPA is scheduled to issue a draft rule in the first half of 2011 and a final rule in 2012.

Advance Notice of Proposed Rulemaking on PCBs: In April 2010, the EPA issued an Advance Notice of Proposed Rulemaking, indicating that it is considering a variety of regulatory actions with respect to PCBs. One proposal aims to phase out equipment containing PCBs by 2025. Another proposal eliminates an exemption for small equipment containing PCBs. Consumers could incur substantial costs associated with the regulation of PCBs due to prior installation of electrical equipment potentially containing PCBs.

Other electric environmental matters could have a major impact on Consumers’ outlook. For additional details on other electric environmental matters, see Note 5, Contingencies and Commitments, “Consumers’ Electric Utility Contingencies — Electric Environmental Matters.”

Electric Transmission: In June 2010, FERC issued a Notice of Proposed Rulemaking to establish a closer link between regional electric transmission planning and cost allocations to ensure the construction of required transmission facilities. In a related matter, MISO filed a tariff revision with FERC in July 2010, proposing a cost allocation methodology for a new category of transmission projects. In December 2010, FERC approved MISO's cost allocation proposal. Under this tariff revision, the cost of these new transmission projects will be spread proportionally across the Midwest Energy Market. Consumers believe that Michigan customers will bear additional costs under MISO's tariff without receiving comparable benefits from these projects. In January 2011, Consumers, along with the Michigan Attorney General, ABATE, Detroit Edison, the Michigan Municipal Electric Association, and the Michigan Public Power Agency, filed a protest and request for rehearing with FERC, opposing the allocation methodology in the MISO tariff revision. Consumers expect to continue to recover transmission expenses, including those associated with the MISO tariff revision, through the PSCR process.

Electric Rate Matters: Rate matters are critical to Consumers’ electric utility business. For details on Consumers’ electric rate cases, PSCR, electric operation and maintenance expenditures show-cause order, electric depreciation cases, renewable energy plan, and energy optimization plan, see Note 6, Regulatory Matters, “Consumers’ Electric Utility.”

## CONSUMERS' GAS UTILITY BUSINESS OUTLOOK AND UNCERTAINTIES

Gas Deliveries: Consumers expect 2011 weather-adjusted gas deliveries to decline by one percent compared with 2010, due to continuing conservation and overall economic conditions in Michigan. In addition, Consumers expect weather-adjusted gas deliveries to decline an average of one percent annually from 2012 through 2016, which includes expected effects of energy efficiency programs and continued conservation. Actual delivery levels from year to year may vary from this trend due to:

• fluctuations in weather;

• use by IPPs;



• availability and development of renewable energy sources;

• changes in gas prices;

• Michigan economic conditions, including population trends and housing activity;

• the price of competing energy sources or fuels; and

• energy efficiency and conservation.

A decoupling mechanism, authorized by the MPSC in Consumers’ 2009 gas rate case order, allows Consumers to adjust future gas rates to compensate for changes in sales volumes by class arising from the difference between the level of average sales per customer adopted in the order and actual average weather-adjusted sales per customer. The mechanism will not provide rate adjustments for changes in sales volumes arising from weather fluctuations. Consumers expect this mechanism to mitigate the impacts of energy efficiency programs, conservation, and changes in economic conditions on its gas revenue.

Gas Pipeline Safety: In September 2010, the U.S. House of Representatives passed the Corporate Liability and Emergency Accident Notification Act, which would require oil and natural gas pipeline operators to notify regulators within one hour following the discovery of certain oil spills or natural gas leaks. The bill also would increase civil fines for delayed reporting of oil spills and natural gas leaks and would establish an online database of safety violations searchable by pipeline owner or operator.

In response to the natural gas pipeline explosion that occurred in San Bruno, California in September 2010, the U.S. House of Representatives and the U.S. Senate have proposed bills stipulating stricter regulation of natural gas pipelines nationwide. These proposed bills affect primarily transmission pipelines and contain provisions mandating:

• the use of internal inspection devices or comparable methods effective in detecting pipeline deterioration;

• the installation of automatic shutoff equipment in high-consequence areas; and

• certain disclosures to homeowners and regulatory agencies.

Consumers continues to comply with laws and regulations governing natural gas pipeline safety. If these proposed laws are put into effect, Consumers could incur significant additional costs related to its natural gas pipeline safety programs. Consumers expects that it would be able to recover the costs in rates, consistent with the recovery of other reasonable costs of complying with laws and regulations.

Gas Environmental Estimates: Consumers expects to incur response activity costs at a number of sites, including 23 former MGP sites. For additional details, see Note 5, Contingencies and Commitments, “Consumers’ Gas Utility Contingencies — Gas Environmental Matters.”

The Mandatory Reporting of Greenhouse Gases Rule requires facilities engaging in the distribution of natural gas to collect data on greenhouse gas emissions resulting from the combustion of natural gas. In 2010, Consumers estimated that carbon dioxide emissions from its customers were 15 million metric tons.

Gas Rate Matters: Rate matters are critical to Consumers’ gas utility business. For details on Consumers’ gas rate cases and GCR, see Note 6, Regulatory Matters, “Consumers’ Gas Utility.”

## CONSUMERS' OTHER OUTLOOK AND UNCERTAINTIES

Smart Grid: Consumers’ grid modernization effort continues to move forward. The foundation of this effort is the installation of advanced metering and the infrastructure to support it. The installation will include smart meters that are capable of transmitting and receiving data, a two-way communications network, and modifications to Consumers’ existing information technology systems to manage the data and enable changes to key business processes. It is intended to allow customers to monitor and manage their energy usage and help reduce demand during critical peak times, resulting in lower peak capacity requirements. Due to this system’s complexity and relative market immaturity, Consumers intends to continue its phased implementation approach. Consumers has concluded the testing and assessment phase of the project and will begin full deployment of meters in early 2012.



## ENTERPRISES OUTLOOK AND UNCERTAINTIES

The primary focus with respect to CMS Energy’s remaining non-utility businesses is to optimize cash flow and maximize the value of their assets.

Trends, uncertainties, and other matters that could have a material impact on CMS Energy’s consolidated income, cash flows, or financial position include:

• indemnity and environmental remediation obligations at Bay Harbor;

• the outcome of certain legal proceedings;

• impacts of declines in electricity prices on the profitability of the enterprises segment’s generating units;

• representations, warranties, and indemnities provided by CMS Energy or its subsidiaries in connection with previous sales of assets;

• changes in commodity prices and interest rates on certain derivative contracts that do not qualify for hedge accounting and must be marked to market through earnings;

• changes in various environmental laws, regulations, principles, practices, or in their interpretation; and

• economic conditions in Michigan, including population trends and housing activity.

For additional details regarding the enterprises segment’s uncertainties, see Note 5, Contingencies and Commitments.

## OTHER OUTLOOK AND UNCERTAINTIES

Litigation: CMS Energy, Consumers, and certain of their subsidiaries are named as parties in various litigation matters, as well as in administrative proceedings before various courts and governmental agencies, arising in the ordinary course of business. For additional details regarding these and other legal matters, see Note 5, Contingencies and Commitments and Note 6, Regulatory Matters.

EnerBank: EnerBank, a wholly owned subsidiary of CMS Capital that represents one percent of CMS Energy’s net assets and three percent of CMS Energy’s Net Income Available to Common Stockholders, is a Utah state-chartered, FDIC-insured industrial bank providing unsecured home improvement loans. The carrying value of EnerBank’s loan portfolio was $385 million at December 31, 2010. Its loan portfolio was funded primarily by deposit liabilities of $363 million. Twelve-month rolling average default rates on loans held by EnerBank have declined from 2.1 percent at December 31, 2009 to 1.4 percent at December 31, 2010. EnerBank expects the rate of loan defaults to decline further, and to level out at about 1.0 percent. CMS Energy is required to ensure that EnerBank remains well capitalized.

## CRITICAL ACCOUNTING POLICIES

The following accounting policies and related information are important to an understanding of CMS Energy’s and Consumers’ results of operations and financial condition and should be considered an integral part of their MD&A. For additional accounting policies, see Note 1, Significant Accounting Policies.

## Use of Estimates and Assumptions

In the preparation of CMS Energy’s and Consumers’ Consolidated Financial Statements, estimates and assumptions are used that may affect reported amounts and disclosures. CMS Energy and Consumers use accounting estimates for asset valuations, unbilled revenue, depreciation, amortization, financial and derivative instruments, employee benefits, the effects of regulation, indemnities, and contingencies. Actual results may differ from estimated results due to changes in the regulatory environment, regulatory decisions, lawsuits, competition, and other factors. CMS Energy and Consumers consider all relevant factors in making these assessments.

Fair Value Measurements: CMS Energy and Consumers have assets and liabilities that are accounted for or disclosed at fair value. Fair value measurements incorporate assumptions that market participants would use in



pricing an asset or liability, including assumptions about risk. Development of these assumptions may require significant judgment. For a detailed discussion of the valuation techniques and inputs used to calculate fair value measurements, see Note 4, Fair Value Measurements. Details about the fair value measurements for the Pension Plan and OPEB plan assets are included in Note 11, Retirement Benefits.

Income Taxes: The amount of income taxes paid by CMS Energy is subject to ongoing audits by federal, state, and foreign tax authorities, which can result in proposed assessments. An estimate of the potential outcome of any uncertain tax issue is highly judgmental. CMS Energy believes adequate reserves have been provided for these exposures; however, future results may include favorable or unfavorable adjustments to the estimated tax liabilities in the period the assessments are made or resolved or when statutes of limitation on potential assessments expire. Additionally, CMS Energy’s judgment as to the ability to recover its deferred tax assets may change. CMS Energy believes the valuation allowances related to its deferred tax assets are adequate, but future results may include favorable or unfavorable adjustments. As a result, CMS Energy’s effective tax rate may fluctuate significantly over time.

Long-Lived Assets and Equity Method Investments: CMS Energy and Consumers assess the recoverability of their long-lived assets and equity method investments by performing impairment tests if certain triggering events occur or if there has been a decline in value that may be other than temporary. CMS Energy and Consumers base their evaluations of impairment on such indicators as:

• the nature of the assets;

• projected future economic benefits;

• regulatory and political environments;

• historical and future cash flow and profitability measurements; and

• other external market conditions and factors.

The estimates CMS Energy and Consumers use may change over time, which could have a material impact on their Consolidated Financial Statements. For additional details, see Note 20, Asset Sales, Discontinued Operations, and Impairment Charges.

Unbilled Revenues: CMS Energy’s and Consumers’ customers are billed monthly in cycles having billing dates that do not generally coincide with the end of a calendar month. This results in customers having received electricity or gas that they have not been billed for as of the month-end. Consumers estimates its unbilled revenues by applying an average billed rate to total unbilled deliveries for each customer class. Unbilled revenues, which are recorded as Accounts receivable on CMS Energy’s and Consumers’ Consolidated Balance Sheets, were $439 million at December 31, 2010 and $477 million at December 31, 2009.

## Accounting for the Effects of Industry Regulation

Because Consumers has regulated operations, it uses regulatory accounting to recognize the effects of the regulators' decisions on its financial statements. Consumers continually assesses whether future recovery of its regulatory assets is probable by considering communications and experience with its regulators and changes in the regulatory environment. If Consumers determined that recovery of a regulatory asset were not probable, Consumers would be required to write off the asset and immediately recognize the expense to earnings.

Under electric and gas rate orders issued by the MPSC in 2009 and 2010, Consumers was granted authority to implement revenue decoupling mechanisms. The electric decoupling mechanism adjusts customer rates to collect or refund the change in marginal revenue arising from the difference between the level of average sales per customer adopted in the electric rate order and actual average sales per customer. The gas decoupling mechanism is similar, but does not adjust customer rates for changes in sales volumes resulting from weather fluctuations. Consumers accounts for these programs as alternative-revenue programs that meet the criteria for recognizing the effects of decoupling adjustments on revenue as electricity and gas are delivered.

Unless prohibited by the MPSC upon a showing of good cause, Consumers is allowed to self-implement new energy rates six months after a new rate case filing; however, the rates that Consumers self-implements may be



subject to refund, with interest. Consumers recognizes revenue associated with self-implemented rates. If Consumers considers it probable that it will be required to refund a portion of its self-implemented rates, it records a provision for revenue subject to refund. A final rate order could differ materially from Consumers' estimates underlying its self-implemented rates, giving rise to accounting adjustments. Under accounting rules for prior period adjustments, CMS Energy and Consumers may need to record such differences, if they are specifically identifiable to prior interim periods, as revisions to those periods.

For additional details, see Note 6, Regulatory Matters.

## FINANCIAL AND DERIVATIVE INSTRUMENTS AND MARKET RISK INFORMATION

Financial Instruments: Debt and equity securities classified as available for sale are reported at fair value as determined from quoted market prices or other observable, market-based inputs. Unrealized gains and losses resulting from changes in fair value of the equity securities are reported, net of tax, in equity as part of AOCI, except that unrealized losses determined to be other than temporary are reported in earnings. Unrealized gains resulting from changes in fair value of the debt securities are reported, net of tax, in equity as part of AOCI. Unrealized losses on the debt securities, if significant, are considered other than temporary and reported in earnings since these securities are managed by an independent investment manager that can sell the securities at its own discretion.

Derivative Instruments: CMS Energy and Consumers account for certain contracts as derivative instruments. The criteria used to determine if an instrument qualifies for derivative accounting are complex and often require significant judgment in application. If a contract is a derivative and does not qualify for the normal purchases and sales exception, it is recorded on the consolidated balance sheet at its fair value. Each quarter, the resulting asset or liability is adjusted to reflect any change in the fair value of the contract. For additional details on CMS Energy’s and Consumers’ derivatives, see Note 10, Derivative Instruments.

CMS Energy and Consumers generally use information from external sources, such as quoted market prices and other valuation information to determine the fair value of their derivatives. For certain contracts, this information is not available and mathematical models are used to value the derivatives. The most material of CMS Energy’s derivative liabilities, an electricity sales agreement held by CMS ERM, extends beyond the term for which quoted electricity prices are available. Thus, to value this derivative, CMS Energy uses a valuation model that incorporates a proprietary forward pricing curve for electricity based on forward natural gas prices and an implied heat rate. The model incorporates discounting, credit, and modeling risks. The model is sensitive to electricity and natural gas forward prices, and the fair value of this derivative liability will increase as these forward prices increase. The model is adjusted each quarter to incorporate market data as it becomes available.

The fair values calculated for CMS Energy’s and Consumers’ derivatives may change significantly as commodity prices and volatilities change. The cash returns actually realized on derivatives may be different from their estimated fair values. For derivatives in an asset position, calculations of fair value include reserves of less than $1 million to reflect the credit risk of CMS Energy’s and Consumers’ counterparties. For derivatives in a liability position, calculations include reserves of less than $1 million to reflect CMS Energy’s and Consumers’ own credit risk. For additional details on how the fair values of derivatives are determined, see Note 4, Fair Value Measurements.

The types of contracts typically classified as derivatives are interest rate swaps, financial transmission rights, fixed price fuel contracts, natural gas futures, electricity swaps, and forward and option contracts for electricity, natural gas, and foreign currencies. Most of CMS Energy’s and Consumers’ commodity purchase and sale contracts are not subject to derivative accounting because:

• they do not have a notional amount (that is, a number of units specified in a derivative instrument, such as MWh of electricity or bcf of natural gas);

• they qualify for the normal purchases and sales exception; or

• there is not an active market for the commodity.

CMS Energy’s and Consumers’ coal purchase contracts are not derivatives because there is not an active market for the coal they purchase. If an active market for coal develops in the future, some of these contracts may



qualify as derivatives. For Consumers, which is subject to regulatory accounting, the resulting mark-to-market gains and losses would be offset by changes in regulatory assets and liabilities and would not affect net income. For other subsidiaries, CMS Energy does not believe the resulting mark-to-market impact on earnings would be material.

Market Risk Information: CMS Energy and Consumers are exposed to market risks including, but not limited to, changes in interest rates, commodity prices, and investment security prices. They may enter into various risk management contracts to limit exposure to these risks, including swaps, options, futures, and forward contracts. CMS Energy and Consumers enter into these contracts using established policies and procedures, under the direction of an executive oversight committee consisting of senior management representatives and a risk committee consisting of business unit managers.

These contracts contain credit risk, which is the risk that the counterparties will fail to meet their contractual obligations. CMS Energy and Consumers reduce this risk using established policies and procedures, such as evaluating counterparties' credit quality and setting collateral requirements as necessary. If terms permit, standard agreements are used that allow for the netting of positive and negative exposures associated with the same counterparty. Given these policies, present exposures, and credit reserves, CMS Energy and Consumers do not expect a material adverse effect on their financial position or future earnings because of counterparty nonperformance.

The following risk sensitivities illustrate the potential loss in fair value, cash flows, or future earnings from financial instruments, including derivative contracts, assuming a hypothetical adverse change in market rates or prices of ten percent. Potential losses could exceed the amounts shown in the sensitivity analyses if changes in market rates or prices were to exceed ten percent.

Interest-Rate Risk: CMS Energy and Consumers are exposed to interest-rate risk resulting from issuing fixed-rate and variable-rate financing instruments. CMS Energy and Consumers use a combination of these instruments, and may also enter into interest-rate swap agreements, in order to manage this risk and to achieve a reasonable cost of capital.

Interest-Rate Risk Sensitivity Analysis (assuming an adverse change in market interest rates of ten percent):

<table><tr><td>December 31</td><td>2010</td><td>2009</td></tr><tr><td></td><td colspan="2">In Millions</td></tr><tr><td>Fixed-rate financing — potential loss in fair value</td><td></td><td></td></tr><tr><td>CMS Energy, including Consumers</td><td>$187</td><td>$183</td></tr><tr><td>Consumers</td><td>113</td><td>122</td></tr></table>

The fair value losses in the above table could be realized only if CMS Energy and Consumers transferred all of their fixed-rate financing to other creditors. The annual earnings exposure related to variable-rate financing was insignificant for both CMS Energy and Consumers at December 31, 2010 and 2009, assuming an adverse change in market interest rates of ten percent.

Commodity Price Risk: CMS Energy and Consumers are exposed to commodity price risk, which arises from fluctuations in the price of electricity, natural gas, coal, and other commodities. Commodity prices are influenced by a number of factors, including weather, changes in supply and demand, and liquidity of commodity markets. In order to manage commodity price risk, they may enter into various non-trading derivative contracts, such as forward purchase and sale contracts, options, and swaps.

An adverse change in market prices of ten percent would result in a potential reduction in fair value of less than $1 million for CMS Energy’s and Consumers’ derivative contracts.

Investment Securities Price Risk: Through investments in debt and equity securities, CMS Energy and Consumers are exposed to changes in interest rates and price fluctuations in equity markets. The following table shows the potential effect of adverse changes in interest rates and fluctuations in equity prices on CMS Energy’s and Consumers’ available-for-sale investments.



Investment Securities Price Risk Sensitivity Analysis (assuming an adverse change in market interest rates or prices of ten percent):

<table><tr><td>December 31</td><td>2010</td><td>2009</td></tr><tr><td></td><td>In Millions</td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td></tr><tr><td>Potential reduction in fair value of available-for-sale:</td><td></td><td></td></tr><tr><td>SERP:</td><td></td><td></td></tr><tr><td>Mutual fund</td><td>$ 6</td><td>$—</td></tr><tr><td>State &amp; municipal bonds</td><td>—</td><td>1</td></tr><tr><td>CONSUMERS</td><td></td><td></td></tr><tr><td>Potential reduction in fair value of available-for-sale:</td><td></td><td></td></tr><tr><td>SERP:</td><td></td><td></td></tr><tr><td>Mutual fund</td><td>$ 4</td><td>$—</td></tr><tr><td>CMS Energy common stock</td><td>3</td><td>3</td></tr></table>

Shares in the mutual fund were acquired during the year ended December 31, 2010.

Notes Receivable Risk: CMS Energy is exposed to interest-rate risk resulting from EnerBank’s fixed-rate installment loans. EnerBank provides these loans to homeowners to finance home improvements.

Notes Receivable Sensitivity Analysis (assuming an adverse change in market interest rates of ten percent): December 31 2010 2009

CMS ENERGY, INCLUDING CONSUMERS

Potential reduction in fair value:

Notes receivable $6 $5

The fair value losses in the above table could be realized only if EnerBank sold its loans to other parties. For additional details on market risk, financial instruments, and derivatives, see Note 9, Financial Instruments and Note 10, Derivative Instruments.

## Retirement Benefits

Pension: CMS Energy and Consumers have external trust funds to provide retirement pension benefits to their employees under a non-contributory, defined benefit Pension Plan. On September 1, 2005, the defined benefit Pension Plan was closed to new participants and CMS Energy and Consumers implemented the qualified DCCP, which provides an employer contribution of six percent of base pay to the existing 401(k) plan. An employee contribution is not required to receive the plan’s employer cash contribution. All employees hired on or after September 1, 2005 participate in this plan as part of their retirement benefit program. Previous cash balance Pension Plan participants also participate in the DCCP as of September 1, 2005. Additional pay credits under the cash balance Pension Plan were discontinued as of that date.

401(k): CMS Energy and Consumers provide an employer match in their 401(k) plan equal to 60 percent on eligible contributions up to the first six percent of an employee’s wages.

OPEB: CMS Energy and Consumers provide postretirement health and life benefits under their OPEB plan to qualifying retired employees.

CMS Energy and Consumers record liabilities for pension and OPEB on their Consolidated Balance Sheets at the present value of the future obligations, net of any plan assets. The calculation of the liabilities and associated expenses requires the expertise of actuaries, and requires many assumptions, including:

• life expectancies;

• discount rates;



• expected long-term rate of return on plan assets;

• rate of compensation increases; and

• anticipated health care costs.

A change in these assumptions could change significantly CMS Energy’s and Consumers’ recorded liabilities and associated expenses.

Presented in the following table are estimates of CMS Energy’s and Consumers’ pension cost, OPEB cost, and cash contributions through 2013:

<table><tr><td></td><td>Pension Cost</td><td>OPEB Cost</td><td>Pension Contribution In Millions</td><td>OPEB Contribution</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>2011</td><td>$104</td><td>$49</td><td>$ —</td><td>$65</td></tr><tr><td>2012</td><td>106</td><td>57</td><td>—</td><td>49</td></tr><tr><td>2013</td><td>102</td><td>53</td><td>154</td><td>57</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>2011</td><td>$101</td><td>$51</td><td>$ —</td><td>$64</td></tr><tr><td>2012</td><td>103</td><td>59</td><td>—</td><td>48</td></tr><tr><td>2013</td><td>99</td><td>55</td><td>149</td><td>56</td></tr></table>

Contribution estimates include amounts required and discretionary contributions. Consumers’ pension and OPEB costs are recoverable through its general ratemaking process. Actual future pension cost and contributions will depend on future investment performance, changes in future discount rates, and various other factors related to the populations participating in the Pension Plan.

Lowering the expected long-term rate of return on the Pension Plan assets by 0.25 percentage point (from 8.0 percent to 7.75 percent) would increase estimated pension cost for 2011 by $4 million for both CMS Energy and Consumers. Lowering the discount rate by 0.25 percentage point (from 5.40 percent to 5.15 percent) would increase estimated pension cost for 2011 by $5 million for both CMS Energy and Consumers.

For additional details on postretirement benefits, see Note 11, Retirement Benefits.

## Asset Retirement Obligations

CMS Energy and Consumers are required to record the fair value of the cost to remove assets at the end of their useful lives if there is a legal obligation to remove them. CMS Energy and Consumers have legal obligations to remove some of their assets at the end of their useful lives. CMS Energy and Consumers calculate the fair value of ARO liabilities using an expected present value technique that reflects assumptions about costs, inflation, and profit margin that third parties would require to assume the obligation. CMS Energy and Consumers did not include market risk premiums in their ARO fair value estimates since reasonable estimates could not be made.

If a reasonable estimate of fair value cannot be made in the period in which the ARO is incurred, such as for assets with indeterminate lives, the liability is recognized when a reasonable estimate of fair value can be made. CMS Energy and Consumers have not recorded liabilities for assets that have insignificant cumulative disposal costs, such as substation batteries. For additional details, see Note 16, Asset Retirement Obligations.

## NEW ACCOUNTING STANDARDS

For details regarding the implementation of new accounting standards and new accounting standards issued that are not yet effective, see Note 2, New Accounting Standards.



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## CMS Energy Corporation
CONSOLIDATED STATEMENTS OF INCOME

<table><tr><td rowspan="3"></td><td colspan="3">Years Ended December 31</td></tr><tr><td>2010</td><td>2009</td><td>2008</td></tr><tr><td colspan="3">In Millions</td></tr><tr><td>Operating Revenue</td><td>$6,432</td><td>$6,205</td><td>$6,807</td></tr><tr><td>Operating Expenses</td><td></td><td></td><td></td></tr><tr><td>Fuel for electric generation</td><td>604</td><td>541</td><td>600</td></tr><tr><td>Purchased and interchange power</td><td>1,239</td><td>1,163</td><td>1,335</td></tr><tr><td>Purchased power — related parties</td><td>85</td><td>—</td><td>—</td></tr><tr><td>Cost of gas sold</td><td>1,590</td><td>1,866</td><td>2,277</td></tr><tr><td>Maintenance and other operating expenses</td><td>1,206</td><td>1,163</td><td>1,019</td></tr><tr><td>Depreciation and amortization</td><td>576</td><td>570</td><td>588</td></tr><tr><td>General taxes</td><td>210</td><td>217</td><td>203</td></tr><tr><td>Insurance settlement</td><td>(50)</td><td>—</td><td>—</td></tr><tr><td>Gain on asset sales, net</td><td>(6)</td><td>(13)</td><td>(9)</td></tr><tr><td>Total operating expenses</td><td>5,454</td><td>5,507</td><td>6,013</td></tr><tr><td>Operating Income</td><td>978</td><td>698</td><td>794</td></tr><tr><td>Other Income (Expense)</td><td></td><td></td><td></td></tr><tr><td>Interest and dividends</td><td>19</td><td>18</td><td>24</td></tr><tr><td>Allowance for equity funds used during construction</td><td>5</td><td>6</td><td>6</td></tr><tr><td>Income (loss) from equity method investees</td><td>11</td><td>(2)</td><td>5</td></tr><tr><td>Other income</td><td>32</td><td>80</td><td>48</td></tr><tr><td>Other expense</td><td>(24)</td><td>(30)</td><td>(37)</td></tr><tr><td>Total other income</td><td>43</td><td>72</td><td>46</td></tr><tr><td>Interest Charges</td><td></td><td></td><td></td></tr><tr><td>Interest on long-term debt</td><td>394</td><td>383</td><td>371</td></tr><tr><td>Other interest</td><td>40</td><td>56</td><td>33</td></tr><tr><td>Allowance for borrowed funds used during construction</td><td>(3)</td><td>(4)</td><td>(4)</td></tr><tr><td>Total interest charges</td><td>431</td><td>435</td><td>400</td></tr><tr><td>Income Before Income Taxes</td><td>590</td><td>335</td><td>440</td></tr><tr><td>Income Tax Expense</td><td>224</td><td>115</td><td>139</td></tr><tr><td>Income From Continuing Operations</td><td>366</td><td>220</td><td>301</td></tr><tr><td>Income (Loss) From Discontinued Operations, Net of Tax</td><td></td><td></td><td></td></tr><tr><td>Expense of $2, $13, and $1</td><td>(23)</td><td>20</td><td>1</td></tr><tr><td>Net Income</td><td>343</td><td>240</td><td>302</td></tr><tr><td>Income Attributable to Noncontrolling Interests</td><td>3</td><td>11</td><td>7</td></tr><tr><td>Net Income Attributable to CMS Energy</td><td>340</td><td>229</td><td>295</td></tr><tr><td>Charge for Deferred Issuance Costs on Preferred Stock</td><td>8</td><td>—</td><td>—</td></tr><tr><td>Preferred Stock Dividends</td><td>8</td><td>11</td><td>11</td></tr><tr><td>Net Income Available to Common Stockholders</td><td>$324</td><td>$218</td><td>$284</td></tr></table>



<table><tr><td rowspan="3"></td><td colspan="4">Years Ended December 31</td></tr><tr><td>2010</td><td>2009</td><td>2008</td><td></td></tr><tr><td colspan="4">In Millions, Except Per Share Amounts</td></tr><tr><td>Net Income Attributable to Common Stockholders</td><td></td><td></td><td></td><td></td></tr><tr><td>Amounts Attributable to Continuing Operations</td><td>$ 347</td><td>$ 198</td><td>$ 283</td><td></td></tr><tr><td>Amounts Attributable to Discontinued Operations</td><td>(23)</td><td>20</td><td>1</td><td></td></tr><tr><td>Net Income Available to Common Stockholders</td><td>$ 324</td><td>$ 218</td><td>$ 284</td><td></td></tr><tr><td>Income Attributable to Noncontrolling Interests</td><td></td><td></td><td></td><td></td></tr><tr><td>Amounts Attributable to Continuing Operations</td><td>$ 3</td><td>$ 11</td><td>$ 7</td><td></td></tr><tr><td>Amounts Attributable to Discontinued Operations</td><td>—</td><td>—</td><td>—</td><td></td></tr><tr><td>Income Attributable to Noncontrolling Interests</td><td>$ 3</td><td>$ 11</td><td>$ 7</td><td></td></tr><tr><td>Basic Earnings Per Average Common Share</td><td></td><td></td><td></td><td></td></tr><tr><td>Basic Earnings from Continuing Operations</td><td>$ 1.50</td><td>$0.87</td><td>$1.25</td><td></td></tr><tr><td>Basic Earnings (Loss) from Discontinued Operations</td><td>(0.10)</td><td>0.09</td><td>—</td><td></td></tr><tr><td>Basic Earnings Attributable to Common Stock</td><td>$ 1.40</td><td>$0.96</td><td>$1.25</td><td></td></tr><tr><td>Diluted Earnings Per Average Common Share</td><td></td><td></td><td></td><td></td></tr><tr><td>Diluted Earnings from Continuing Operations</td><td>$ 1.36</td><td>$0.83</td><td>$1.20</td><td></td></tr><tr><td>Diluted Earnings (Loss) from Discontinued Operations</td><td>(0.08)</td><td>0.08</td><td>—</td><td></td></tr><tr><td>Diluted Earnings Attributable to Common Stock</td><td>$ 1.28</td><td>$0.91</td><td>$1.20</td><td></td></tr><tr><td>Dividends Declared Per Common Share</td><td>$ 0.66</td><td>$0.50</td><td>$0.36</td><td></td></tr></table>



## CMS Energy Corporation
CONSOLIDATED STATEMENTS OF CASH FLOWS

<table><tr><td rowspan="3"></td><td colspan="4">Years Ended December 31</td></tr><tr><td>2010</td><td>2009</td><td>2008</td><td></td></tr><tr><td colspan="4">In Millions</td></tr><tr><td>Cash Flows from Operating Activities</td><td></td><td></td><td></td><td></td></tr><tr><td>Net Income</td><td>$ 343</td><td>$ 240</td><td>$ 302</td><td></td></tr><tr><td>Adjustments to reconcile net income to net cash provided by operating activities</td><td></td><td></td><td></td><td></td></tr><tr><td>Depreciation and amortization</td><td>576</td><td>570</td><td>589</td><td></td></tr><tr><td>Deferred income taxes and investment tax credit</td><td>227</td><td>122</td><td>126</td><td></td></tr><tr><td>Postretirement benefits expense</td><td>213</td><td>181</td><td>144</td><td></td></tr><tr><td>Capital lease and other amortization</td><td>40</td><td>42</td><td>44</td><td></td></tr><tr><td>Bad debt expense</td><td>57</td><td>54</td><td>51</td><td></td></tr><tr><td>Gain due to expiration of indemnification obligation</td><td>—</td><td>(50)</td><td>—</td><td></td></tr><tr><td>Other non-cash operating activities</td><td>(1)</td><td>(42)</td><td>(43)</td><td></td></tr><tr><td>Postretirement benefits contributions</td><td>(463)</td><td>(262)</td><td>(51)</td><td></td></tr><tr><td>Electric sales contract termination payment</td><td>—</td><td>—</td><td>(275)</td><td></td></tr><tr><td>Changes in other assets and liabilities:</td><td></td><td></td><td></td><td></td></tr><tr><td>Increase in accounts receivable, notes receivable, and accrued revenue</td><td>(105)</td><td>(91)</td><td>(80)</td><td></td></tr><tr><td>Decrease (increase) in accrued power supply revenue</td><td>33</td><td>(41)</td><td>35</td><td></td></tr><tr><td>Decrease (increase) in inventories</td><td>133</td><td>86</td><td>(71)</td><td></td></tr><tr><td>Decrease in accounts payable</td><td>(7)</td><td>(50)</td><td>(5)</td><td></td></tr><tr><td>Increase (decrease) in accrued expenses</td><td>22</td><td>(6)</td><td>(31)</td><td></td></tr><tr><td>Decrease (increase) in other current and non-current assets</td><td>(28)</td><td>59</td><td>12</td><td></td></tr><tr><td>Increase (decrease) in current and non-current regulatory liabilities</td><td>(69)</td><td>102</td><td>(178)</td><td></td></tr><tr><td>Decrease in other current and non-current liabilities</td><td>(12)</td><td>(66)</td><td>(12)</td><td></td></tr><tr><td>Net cash provided by operating activities</td><td>959</td><td>848</td><td>557</td><td></td></tr><tr><td>Cash Flows from Investing Activities</td><td></td><td></td><td></td><td></td></tr><tr><td>Capital expenditures (excludes assets placed under capital lease)</td><td>(821)</td><td>(818)</td><td>(792)</td><td></td></tr><tr><td>Cost to retire property</td><td>(43)</td><td>(49)</td><td>(34)</td><td></td></tr><tr><td>Cash effect of deconsolidation of partnerships</td><td>(10)</td><td>—</td><td>—</td><td></td></tr><tr><td>Increase in loans and notes receivable</td><td>(131)</td><td>(83)</td><td>(19)</td><td></td></tr><tr><td>Other investing activities</td><td>2</td><td>15</td><td>6</td><td></td></tr><tr><td>Net cash used in investing activities</td><td>(1,003)</td><td>(935)</td><td>(839)</td><td></td></tr></table>



<table><tr><td rowspan="3"></td><td colspan="3">Years Ended December 31</td></tr><tr><td>2010</td><td>2009</td><td>2008</td></tr><tr><td colspan="3">In Millions</td></tr><tr><td>Cash Flows from Financing Activities</td><td></td><td></td><td></td></tr><tr><td>Proceeds from issuance of long-term debt</td><td>1,400</td><td>1,218</td><td>1,265</td></tr><tr><td>Proceeds from EnerBank notes, net</td><td>149</td><td>39</td><td>23</td></tr><tr><td>Issuance of common stock</td><td>10</td><td>9</td><td>9</td></tr><tr><td>Retirement of long-term debt</td><td>(878)</td><td>(1,154)</td><td>(1,022)</td></tr><tr><td>Payment of common stock dividends</td><td>(154)</td><td>(114)</td><td>(82)</td></tr><tr><td>Payment of preferred stock dividends</td><td>(8)</td><td>(11)</td><td>(11)</td></tr><tr><td>Redemption of preferred stock</td><td>(239)</td><td>(4)</td><td>(1)</td></tr><tr><td>Payment of capital and finance lease obligations</td><td>(23)</td><td>(23)</td><td>(26)</td></tr><tr><td>Increase (decrease) in notes payable</td><td>(40)</td><td>40</td><td>—</td></tr><tr><td>Other financing costs</td><td>(15)</td><td>(35)</td><td>(8)</td></tr><tr><td>Net cash (used in) provided by financing activities</td><td>202</td><td>(35)</td><td>147</td></tr><tr><td>Net Increase (Decrease) in Cash and Cash Equivalents, Including Assets</td><td></td><td></td><td></td></tr><tr><td>Held for Sale</td><td>158</td><td>(122)</td><td>(135)</td></tr><tr><td>Decrease (Increase) in Cash and Cash Equivalents Included in Assets</td><td></td><td></td><td></td></tr><tr><td>Held for Sale</td><td>(1)</td><td>5</td><td>(2)</td></tr><tr><td>Net Increase (Decrease) in Cash and Cash Equivalents</td><td>157</td><td>(117)</td><td>(137)</td></tr><tr><td>Cash and Cash Equivalents, Beginning of Period</td><td>90</td><td>207</td><td>344</td></tr><tr><td>Cash and Cash Equivalents, End of Period</td><td>$ 247</td><td>$ 90</td><td>$ 207</td></tr><tr><td>Other cash flow activities and non-cash investing and financing activities were:</td><td></td><td></td><td></td></tr><tr><td>Cash transactions</td><td></td><td></td><td></td></tr><tr><td>Interest paid (net of amounts capitalized)</td><td>$ 405</td><td>$ 422</td><td>$ 372</td></tr><tr><td>Income taxes paid (net of refunds of \), \), and \()</td><td>14</td><td>17</td><td>3</td></tr><tr><td>Non-cash transactions</td><td></td><td></td><td></td></tr><tr><td>Capital expenditures not paid</td><td>$ 56</td><td>$ 15</td><td>$ 31</td></tr><tr><td>Other assets placed under capital lease</td><td>16</td><td>16</td><td>5</td></tr></table>



## CMS Energy Corporation
CONSOLIDATED BALANCE SHEETS

<table><tr><td rowspan="3"></td><td colspan="2">December 31</td></tr><tr><td>2010</td><td>2009</td></tr><tr><td colspan="2">In Millions</td></tr><tr><td>ASSETS</td><td></td><td></td></tr><tr><td>Current Assets</td><td></td><td></td></tr><tr><td>Cash and cash equivalents</td><td>$ 247</td><td>$ 90</td></tr><tr><td>Restricted cash and cash equivalents</td><td>23</td><td>32</td></tr><tr><td>Accounts receivable and accrued revenue, less allowances of $25 in 2010 and $23 in 2009</td><td>981</td><td>948</td></tr><tr><td>Notes receivable</td><td>70</td><td>81</td></tr><tr><td>Accounts receivable — related parties</td><td>10</td><td>—</td></tr><tr><td>Accrued power supply revenue</td><td>15</td><td>48</td></tr><tr><td>Inventories at average cost</td><td></td><td></td></tr><tr><td>Gas in underground storage</td><td>946</td><td>1,043</td></tr><tr><td>Materials and supplies</td><td>104</td><td>118</td></tr><tr><td>Generating plant fuel stock</td><td>125</td><td>158</td></tr><tr><td>Deferred property taxes</td><td>180</td><td>172</td></tr><tr><td>Regulatory assets</td><td>19</td><td>19</td></tr><tr><td>Assets held for sale</td><td>2</td><td>2</td></tr><tr><td>Prepayments and other current assets</td><td>37</td><td>31</td></tr><tr><td>Total current assets</td><td>2,759</td><td>2,742</td></tr><tr><td>Plant, Property &amp; Equipment (at cost)</td><td></td><td></td></tr><tr><td>Plant, property &amp; equipment, gross</td><td>14,145</td><td>13,716</td></tr><tr><td>Less accumulated depreciation, depletion and amortization</td><td>4,646</td><td>4,540</td></tr><tr><td>Plant, property &amp; equipment, net</td><td>9,499</td><td>9,176</td></tr><tr><td>Construction work in progress</td><td>570</td><td>506</td></tr><tr><td>Total plant, property &amp; equipment</td><td>10,069</td><td>9,682</td></tr><tr><td>Non-current Assets</td><td></td><td></td></tr><tr><td>Regulatory assets</td><td>2,093</td><td>2,291</td></tr><tr><td>Notes receivable, less allowances of $5 in 2010 and $6 in 2009</td><td>397</td><td>297</td></tr><tr><td>Investments</td><td>49</td><td>9</td></tr><tr><td>Assets held for sale</td><td>4</td><td>9</td></tr><tr><td>Other non-current assets</td><td>245</td><td>226</td></tr><tr><td>Total non-current assets</td><td>2,788</td><td>2,832</td></tr><tr><td>Total Assets</td><td>$15,616</td><td>$15,256</td></tr></table>



<table><tr><td rowspan="3"></td><td colspan="2">December 31</td></tr><tr><td>2010</td><td>2009</td></tr><tr><td colspan="2">In Millions</td></tr><tr><td>LIABILITIES AND EQUITY</td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td></tr><tr><td>Current portion of long-term debt, capital and finance lease obligations</td><td>$ 750</td><td>$ 694</td></tr><tr><td>Notes payable</td><td>—</td><td>40</td></tr><tr><td>Accounts payable</td><td>492</td><td>509</td></tr><tr><td>Accounts payable — related parties</td><td>9</td><td>—</td></tr><tr><td>Accrued rate refunds</td><td>19</td><td>21</td></tr><tr><td>Accrued interest</td><td>102</td><td>96</td></tr><tr><td>Accrued taxes</td><td>302</td><td>283</td></tr><tr><td>Deferred income taxes</td><td>180</td><td>43</td></tr><tr><td>Regulatory liabilities</td><td>22</td><td>145</td></tr><tr><td>Liabilities held for sale</td><td>1</td><td>—</td></tr><tr><td>Other current liabilities</td><td>144</td><td>123</td></tr><tr><td>Total current liabilities</td><td>2,021</td><td>1,954</td></tr><tr><td>Non-current Liabilities</td><td></td><td></td></tr><tr><td>Long-term debt</td><td>6,448</td><td>5,895</td></tr><tr><td>Non-current portion of capital and finance lease obligations</td><td>188</td><td>197</td></tr><tr><td>Regulatory liabilities</td><td>1,988</td><td>1,991</td></tr><tr><td>Postretirement benefits</td><td>1,135</td><td>1,460</td></tr><tr><td>Asset retirement obligations</td><td>245</td><td>229</td></tr><tr><td>Deferred investment tax credit</td><td>49</td><td>51</td></tr><tr><td>Deferred income taxes</td><td>438</td><td>231</td></tr><tr><td>Other non-current liabilities</td><td>267</td><td>310</td></tr><tr><td>Total non-current liabilities</td><td>10,758</td><td>10,364</td></tr><tr><td>Commitments and Contingencies (Notes 5, 6, 7, 9, and 10)</td><td></td><td></td></tr><tr><td>Equity</td><td></td><td></td></tr><tr><td>Common stockholders&#x27; equity</td><td></td><td></td></tr><tr><td>Common stock, authorized 350.0 shares; outstanding 249.6 shares in 2010 and 227.9 shares in 2009</td><td>2</td><td>2</td></tr><tr><td>Other paid-in capital</td><td>4,588</td><td>4,560</td></tr><tr><td>Accumulated other comprehensive loss</td><td>(40)</td><td>(33)</td></tr><tr><td>Accumulated deficit</td><td>(1,757)</td><td>(1,927)</td></tr><tr><td>Total common stockholders&#x27; equity</td><td>2,793</td><td>2,602</td></tr><tr><td>Preferred stock</td><td>—</td><td>239</td></tr><tr><td>Noncontrolling interests</td><td>44</td><td>97</td></tr><tr><td>Total equity</td><td>2,837</td><td>2,938</td></tr><tr><td>Total Liabilities and Equity</td><td>$15,616</td><td>$15,256</td></tr></table>



## CMS Energy Corporation
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

<table><tr><td rowspan="3"></td><td colspan="7">Years Ended December 31</td></tr><tr><td>2010</td><td>2009</td><td>2008</td><td>2010</td><td>2009</td><td>2008</td><td></td></tr><tr><td colspan="4">Number of Shares in Thousands</td><td colspan="3">In Millions</td></tr><tr><td>Common Stock</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>At beginning and end of period</td><td></td><td></td><td></td><td></td><td>$ 2</td><td>$ 2</td><td>$ 2</td></tr><tr><td>Other Paid-in Capital</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>At beginning of period</td><td>227,891</td><td>226,414</td><td>225,146</td><td>4,560</td><td>4,533</td><td>4,517</td><td></td></tr><tr><td>Common stock issued</td><td>22,090</td><td>1,793</td><td>1,751</td><td>22</td><td>17</td><td>17</td><td></td></tr><tr><td>Common stock repurchased</td><td>(148)</td><td>(78)</td><td>(38)</td><td>(2)</td><td>(1)</td><td>(1)</td><td></td></tr><tr><td>Common stock reacquired</td><td>(205)</td><td>(238)</td><td>(445)</td><td>—</td><td>—</td><td>—</td><td></td></tr><tr><td>Conversion option on convertible debt</td><td>—</td><td>—</td><td>—</td><td>—</td><td>11</td><td>—</td><td></td></tr><tr><td>Charge for deferred issuance costs</td><td>—</td><td>—</td><td>—</td><td>8</td><td>—</td><td>—</td><td></td></tr><tr><td>At end of period</td><td>249,628</td><td>227,891</td><td>226,414</td><td>4,588</td><td>4,560</td><td>4,533</td><td></td></tr><tr><td>Accumulated Other Comprehensive Loss</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Retirement benefits liability</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>At beginning of period</td><td></td><td></td><td></td><td>(32)</td><td>(27)</td><td>(15)</td><td></td></tr><tr><td>Net loss arising during the period(a)</td><td></td><td></td><td></td><td>(9)</td><td>(6)</td><td>(12)</td><td></td></tr><tr><td>Amortization of net actuarial loss(a)</td><td></td><td></td><td></td><td>1</td><td>1</td><td>—</td><td></td></tr><tr><td>Prior service credit adjustment(a)</td><td></td><td></td><td></td><td>1</td><td>—</td><td>—</td><td></td></tr><tr><td>At end of period</td><td></td><td></td><td></td><td>(39)</td><td>(32)</td><td>(27)</td><td></td></tr><tr><td>Investments</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>At beginning of period</td><td></td><td></td><td></td><td>—</td><td>—</td><td>—</td><td></td></tr><tr><td>Unrealized gain (loss) on investments(a)</td><td></td><td></td><td></td><td>—</td><td>5</td><td>(15)</td><td></td></tr><tr><td>Reclassification adjustments included in net income(a)</td><td></td><td></td><td></td><td>—</td><td>(5)</td><td>15</td><td></td></tr><tr><td>At end of period</td><td></td><td></td><td></td><td>—</td><td>—</td><td>—</td><td></td></tr><tr><td>Derivative instruments</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>At beginning and end of period</td><td></td><td></td><td></td><td>(1)</td><td>(1)</td><td>(1)</td><td></td></tr><tr><td>Foreign currency translation</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>At beginning of period</td><td></td><td></td><td></td><td>—</td><td>—</td><td>(128)</td><td></td></tr><tr><td>Sale of interests in TGN(a)</td><td></td><td></td><td></td><td>—</td><td>—</td><td>128</td><td></td></tr><tr><td>At end of period</td><td></td><td></td><td></td><td>—</td><td>—</td><td>—</td><td></td></tr><tr><td>At end of period</td><td></td><td></td><td></td><td>(40)</td><td>(33)</td><td>(28)</td><td></td></tr><tr><td>Accumulated Deficit</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>At beginning of period</td><td></td><td></td><td></td><td>(1,927)</td><td>(2,031)</td><td>(2,227)</td><td></td></tr><tr><td>Effects of changing the retirement plans measurement date</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Service cost, interest cost, and expected return on plan assets</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>for December 1 through December 31, 2007, net of tax</td><td></td><td></td><td></td><td>—</td><td>—</td><td>(4)</td><td></td></tr><tr><td>Additional loss from December 1 through December 31, 2007, net of tax</td><td></td><td></td><td></td><td>—</td><td>—</td><td>(2)</td><td></td></tr><tr><td>Net income attributable to CMS Energy(a)</td><td></td><td></td><td></td><td>340</td><td>229</td><td>295</td><td></td></tr><tr><td>Common stock dividends declared</td><td></td><td></td><td></td><td>(154)</td><td>(114)</td><td>(82)</td><td></td></tr><tr><td>Preferred stock dividends declared</td><td></td><td></td><td></td><td>(8)</td><td>(11)</td><td>(11)</td><td></td></tr><tr><td>Charge for deferred issuance costs</td><td></td><td></td><td></td><td>(8)</td><td>—</td><td>—</td><td></td></tr><tr><td>At end of period</td><td></td><td></td><td></td><td>(1,757)</td><td>(1,927)</td><td>(2,031)</td><td></td></tr><tr><td>Preferred Stock</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>At beginning of period</td><td></td><td></td><td></td><td>239</td><td>243</td><td>250</td><td></td></tr><tr><td>Conversion of preferred stock</td><td></td><td></td><td></td><td>(239)</td><td>(4)</td><td>(7)</td><td></td></tr><tr><td>At end of period</td><td></td><td></td><td></td><td>—</td><td>239</td><td>243</td><td></td></tr><tr><td>Noncontrolling Interests</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>At beginning of period</td><td></td><td></td><td></td><td>97</td><td>96</td><td>97</td><td></td></tr><tr><td>Income attributable to noncontrolling interests</td><td></td><td></td><td></td><td>3</td><td>11</td><td>7</td><td></td></tr><tr><td>Distributions and other changes in noncontrolling interests</td><td></td><td></td><td></td><td>(56)</td><td>(10)</td><td>(8)</td><td></td></tr><tr><td>At end of period</td><td></td><td></td><td></td><td>44</td><td>97</td><td>96</td><td></td></tr><tr><td>Total Equity</td><td></td><td></td><td></td><td>$ 2,837</td><td>$ 2,938</td><td>$ 2,815</td><td></td></tr></table>



<table><tr><td rowspan="3"></td><td colspan="4">Years Ended December 31</td></tr><tr><td>2010</td><td>2009</td><td>2008</td><td></td></tr><tr><td colspan="4">In Millions</td></tr><tr><td>(a) Disclosure of Comprehensive Income:</td><td></td><td></td><td></td><td></td></tr><tr><td>Net income</td><td>$343</td><td>$240</td><td>$302</td><td></td></tr><tr><td>Income attributable to noncontrolling interests</td><td>3</td><td>11</td><td>7</td><td></td></tr><tr><td>Net income attributable to CMS Energy</td><td>$340</td><td>$229</td><td>$295</td><td></td></tr><tr><td>Retirement benefits liability:</td><td></td><td></td><td></td><td></td></tr><tr><td>Net loss arising during the period, net of tax benefit of (6) in 2010, (3) in 2009, and (6) in 2008</td><td>(9)</td><td>(6)</td><td>(12)</td><td></td></tr><tr><td>Amortization of net actuarial loss, net of tax of - in 2010 and 2009</td><td>1</td><td>1</td><td>—</td><td></td></tr><tr><td>Prior service credit adjustment, net of tax of 1 in 2010</td><td>1</td><td>—</td><td>—</td><td></td></tr><tr><td>Investments:</td><td></td><td></td><td></td><td></td></tr><tr><td>Unrealized gain (loss) on investments, net of tax (tax benefit) of - in 2010, 3 in 2009, and (9) in 2008</td><td>—</td><td>5</td><td>(15)</td><td></td></tr><tr><td>Reclassification adjustments included in net income (loss), net of tax (tax benefit) of - in 2010, (3) in 2009, and 9 in 2008</td><td>—</td><td>(5)</td><td>15</td><td></td></tr><tr><td>Foreign currency translation:</td><td></td><td></td><td></td><td></td></tr><tr><td>Sale of interests in TGN, net of tax of 69</td><td>—</td><td>—</td><td>128</td><td></td></tr><tr><td>Total Comprehensive Income</td><td>$333</td><td>$224</td><td>$411</td><td></td></tr></table>



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## Consumers Energy Company
CONSOLIDATED STATEMENTS OF INCOME

<table><tr><td rowspan="3"></td><td colspan="3">Years Ended December 31</td></tr><tr><td>2010</td><td>2009</td><td>2008</td></tr><tr><td colspan="3">In Millions</td></tr><tr><td>Operating Revenue</td><td>$6,156</td><td>$5,963</td><td>$6,421</td></tr><tr><td>Operating Expenses</td><td></td><td></td><td></td></tr><tr><td>Fuel for electric generation</td><td>520</td><td>460</td><td>483</td></tr><tr><td>Purchased and interchange power</td><td>1,224</td><td>1,151</td><td>1,313</td></tr><tr><td>Purchased power — related parties</td><td>84</td><td>81</td><td>75</td></tr><tr><td>Cost of gas sold</td><td>1,516</td><td>1,778</td><td>2,079</td></tr><tr><td>Maintenance and other operating expenses</td><td>1,109</td><td>1,045</td><td>935</td></tr><tr><td>Depreciation and amortization</td><td>572</td><td>559</td><td>574</td></tr><tr><td>General taxes</td><td>205</td><td>209</td><td>195</td></tr><tr><td>Loss (gain) on asset sales, net</td><td>—</td><td>(9)</td><td>1</td></tr><tr><td>Total operating expenses</td><td>5,230</td><td>5,274</td><td>5,655</td></tr><tr><td>Operating Income</td><td>926</td><td>689</td><td>766</td></tr><tr><td>Other Income (Expense)</td><td></td><td></td><td></td></tr><tr><td>Interest and dividends</td><td>18</td><td>17</td><td>20</td></tr><tr><td>Allowance for equity funds used during construction</td><td>5</td><td>6</td><td>6</td></tr><tr><td>Other income</td><td>31</td><td>47</td><td>45</td></tr><tr><td>Other expense</td><td>(15)</td><td>(11)</td><td>(28)</td></tr><tr><td>Total other income</td><td>39</td><td>59</td><td>43</td></tr><tr><td>Interest Charges</td><td></td><td></td><td></td></tr><tr><td>Interest on long-term debt</td><td>246</td><td>250</td><td>229</td></tr><tr><td>Other interest</td><td>34</td><td>46</td><td>22</td></tr><tr><td>Allowance for borrowed funds used during construction</td><td>(3)</td><td>(4)</td><td>(4)</td></tr><tr><td>Total interest charges</td><td>277</td><td>292</td><td>247</td></tr><tr><td>Income Before Income Taxes</td><td>688</td><td>456</td><td>562</td></tr><tr><td>Income Tax Expense</td><td>254</td><td>163</td><td>198</td></tr><tr><td>Net Income</td><td>434</td><td>293</td><td>364</td></tr><tr><td>Preferred Stock Dividends</td><td>2</td><td>2</td><td>2</td></tr><tr><td>Net Income Available to Common Stockholder</td><td>$ 432</td><td>$ 291</td><td>$ 362</td></tr></table>



## Consumers Energy Company
CONSOLIDATED STATEMENTS OF CASH FLOWS

<table><tr><td rowspan="3"></td><td colspan="4">Years Ended December 31</td></tr><tr><td>2010</td><td>2009</td><td>2008</td><td></td></tr><tr><td colspan="4">In Millions</td></tr><tr><td>Cash Flows from Operating Activities</td><td></td><td></td><td></td><td></td></tr><tr><td>Net Income</td><td>$ 434</td><td>$ 293</td><td>$ 364</td><td></td></tr><tr><td>Adjustments to reconcile net income to net cash provided by operating activities</td><td></td><td></td><td></td><td></td></tr><tr><td>Depreciation and amortization</td><td>572</td><td>559</td><td>574</td><td></td></tr><tr><td>Deferred income taxes and investment tax credit</td><td>246</td><td>67</td><td>196</td><td></td></tr><tr><td>Postretirement benefits expense</td><td>208</td><td>177</td><td>141</td><td></td></tr><tr><td>Capital lease and other amortization</td><td>24</td><td>26</td><td>30</td><td></td></tr><tr><td>Bad debt expense</td><td>53</td><td>47</td><td>47</td><td></td></tr><tr><td>Other non-cash operating activities</td><td>—</td><td>(35)</td><td>(32)</td><td></td></tr><tr><td>Postretirement benefits contributions</td><td>(447)</td><td>(254)</td><td>(50)</td><td></td></tr><tr><td>Changes in other assets and liabilities:</td><td></td><td></td><td></td><td></td></tr><tr><td>Increase in accounts receivable, notes receivable, and accrued revenue</td><td>(92)</td><td>(92)</td><td>(79)</td><td></td></tr><tr><td>Decrease (increase) in accrued power supply revenue</td><td>33</td><td>(41)</td><td>35</td><td></td></tr><tr><td>Decrease (increase) in inventories</td><td>132</td><td>91</td><td>(89)</td><td></td></tr><tr><td>Increase (decrease) in accounts payable</td><td>(16)</td><td>(50)</td><td>1</td><td></td></tr><tr><td>Increase (decrease) in accrued expenses</td><td>(83)</td><td>2</td><td>(79)</td><td></td></tr><tr><td>Decrease (increase) in other current and non-current assets</td><td>(21)</td><td>60</td><td>14</td><td></td></tr><tr><td>Increase (decrease) in current and non-current regulatory liabilities</td><td>(69)</td><td>101</td><td>(178)</td><td></td></tr><tr><td>Decrease in other current and non-current liabilities</td><td>(64)</td><td>(29)</td><td>(22)</td><td></td></tr><tr><td>Net cash provided by operating activities</td><td>910</td><td>922</td><td>873</td><td></td></tr><tr><td>Cash Flows from Investing Activities</td><td></td><td></td><td></td><td></td></tr><tr><td>Capital expenditures (excludes assets placed under capital lease)</td><td>(815)</td><td>(811)</td><td>(789)</td><td></td></tr><tr><td>Cost to retire property</td><td>(43)</td><td>(49)</td><td>(34)</td><td></td></tr><tr><td>Other investing activities</td><td>(1)</td><td>10</td><td>—</td><td></td></tr><tr><td>Net cash used in investing activities</td><td>(859)</td><td>(850)</td><td>(823)</td><td></td></tr></table>



<table><tr><td rowspan="3"></td><td colspan="3">Years Ended December 31</td></tr><tr><td>2010</td><td>2009</td><td>2008</td></tr><tr><td colspan="3">In Millions</td></tr><tr><td>Cash Flows from Financing Activities</td><td></td><td></td><td></td></tr><tr><td>Proceeds from issuance of long-term debt</td><td>600</td><td>500</td><td>600</td></tr><tr><td>Retirement of long-term debt</td><td>(482)</td><td>(387)</td><td>(444)</td></tr><tr><td>Payment of common stock dividends</td><td>(358)</td><td>(285)</td><td>(297)</td></tr><tr><td>Payment of preferred stock dividends</td><td>(2)</td><td>(2)</td><td>(2)</td></tr><tr><td>Stockholder&#x27;s contribution</td><td>250</td><td>100</td><td>—</td></tr><tr><td>Payment of capital and finance lease obligations</td><td>(23)</td><td>(23)</td><td>(26)</td></tr><tr><td>Other financing costs</td><td>(4)</td><td>(5)</td><td>(7)</td></tr><tr><td>Net cash used in financing activities</td><td>(19)</td><td>(102)</td><td>(176)</td></tr><tr><td>Net Increase (Decrease) in Cash and Cash Equivalents</td><td>32</td><td>(30)</td><td>(126)</td></tr><tr><td>Cash and Cash Equivalents, Beginning of Period</td><td>39</td><td>69</td><td>195</td></tr><tr><td>Cash and Cash Equivalents, End of Period</td><td>$ 71</td><td>$ 39</td><td>$ 69</td></tr><tr><td>Other cash flow activities and non-cash investing and financing activities were:</td><td></td><td></td><td></td></tr><tr><td>Cash transactions</td><td></td><td></td><td></td></tr><tr><td>Interest paid (net of amounts capitalized)</td><td>$ 259</td><td>$ 276</td><td>$ 223</td></tr><tr><td>Income taxes paid</td><td>149</td><td>104</td><td>84</td></tr><tr><td>Non-cash transactions</td><td></td><td></td><td></td></tr><tr><td>Capital expenditures not paid</td><td>$ 56</td><td>$ 15</td><td>$ 31</td></tr><tr><td>Other assets placed under capital lease</td><td>16</td><td>16</td><td>5</td></tr></table>



## Consumers Energy Company
CONSOLIDATED BALANCE SHEETS

<table><tr><td rowspan="3"></td><td colspan="2">December 31</td></tr><tr><td>2010</td><td>2009</td></tr><tr><td colspan="2">In Millions</td></tr><tr><td>ASSETS</td><td></td><td></td></tr><tr><td>Current Assets</td><td></td><td></td></tr><tr><td>Cash and cash equivalents</td><td>$ 71</td><td>$ 39</td></tr><tr><td>Restricted cash and cash equivalents</td><td>23</td><td>22</td></tr><tr><td>Accounts receivable and accrued revenue, less allowances of $23 in 2010 and $21 in 2009</td><td>963</td><td>935</td></tr><tr><td>Notes receivable</td><td>55</td><td>79</td></tr><tr><td>Accrued power supply revenue</td><td>15</td><td>48</td></tr><tr><td>Accounts receivable — related parties</td><td>1</td><td>2</td></tr><tr><td>Inventories at average cost</td><td></td><td></td></tr><tr><td>Gas in underground storage</td><td>941</td><td>1,038</td></tr><tr><td>Materials and supplies</td><td>100</td><td>111</td></tr><tr><td>Generating plant fuel stock</td><td>124</td><td>148</td></tr><tr><td>Deferred property taxes</td><td>180</td><td>172</td></tr><tr><td>Regulatory assets</td><td>19</td><td>19</td></tr><tr><td>Prepayments and other current assets</td><td>27</td><td>23</td></tr><tr><td>Total current assets</td><td>2,519</td><td>2,636</td></tr><tr><td>Plant, Property &amp; Equipment (at cost)</td><td></td><td></td></tr><tr><td>Plant, property &amp; equipment, gross</td><td>14,022</td><td>13,352</td></tr><tr><td>Less accumulated depreciation, depletion, and amortization</td><td>4,593</td><td>4,386</td></tr><tr><td>Plant, property &amp; equipment, net</td><td>9,429</td><td>8,966</td></tr><tr><td>Construction work in progress</td><td>566</td><td>505</td></tr><tr><td>Total plant, property &amp; equipment</td><td>9,995</td><td>9,471</td></tr><tr><td>Non-current Assets</td><td></td><td></td></tr><tr><td>Regulatory assets</td><td>2,093</td><td>2,291</td></tr><tr><td>Investments</td><td>34</td><td>29</td></tr><tr><td>Other non-current assets</td><td>198</td><td>195</td></tr><tr><td>Total non-current assets</td><td>2,325</td><td>2,515</td></tr><tr><td>Total Assets</td><td>$14,839</td><td>$14,622</td></tr></table>



<table><tr><td rowspan="3"></td><td colspan="2">December 31</td></tr><tr><td>2010</td><td>2009</td></tr><tr><td colspan="2">In Millions</td></tr><tr><td>LIABILITIES AND EQUITY</td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td></tr><tr><td>Current portion of long-term debt, capital and finance lease obligations</td><td>$ 61</td><td>$ 365</td></tr><tr><td>Accounts payable</td><td>471</td><td>490</td></tr><tr><td>Accounts payable — related parties</td><td>11</td><td>11</td></tr><tr><td>Accrued rate refunds</td><td>19</td><td>21</td></tr><tr><td>Accrued interest</td><td>74</td><td>70</td></tr><tr><td>Accrued taxes</td><td>199</td><td>277</td></tr><tr><td>Deferred income taxes</td><td>209</td><td>206</td></tr><tr><td>Regulatory liabilities</td><td>22</td><td>145</td></tr><tr><td>Other current liabilities</td><td>95</td><td>86</td></tr><tr><td>Total current liabilities</td><td>1,161</td><td>1,671</td></tr><tr><td>Non-current Liabilities</td><td></td><td></td></tr><tr><td>Long-term debt</td><td>4,488</td><td>4,063</td></tr><tr><td>Non-current portion of capital and finance lease obligations</td><td>188</td><td>197</td></tr><tr><td>Regulatory liabilities</td><td>1,988</td><td>1,991</td></tr><tr><td>Postretirement benefits</td><td>1,076</td><td>1,396</td></tr><tr><td>Asset retirement obligations</td><td>244</td><td>228</td></tr><tr><td>Deferred investment tax credit</td><td>49</td><td>51</td></tr><tr><td>Deferred income taxes</td><td>1,289</td><td>926</td></tr><tr><td>Other non-current liabilities</td><td>176</td><td>241</td></tr><tr><td>Total non-current liabilities</td><td>9,498</td><td>9,093</td></tr><tr><td>Commitments and Contingencies (Notes 5, 6, 7, 9, and 10)</td><td></td><td></td></tr><tr><td>Equity</td><td></td><td></td></tr><tr><td>Common stockholder&#x27;s equity</td><td></td><td></td></tr><tr><td>Common stock, authorized 125.0 shares; outstanding 84.1 shares for both periods</td><td>841</td><td>841</td></tr><tr><td>Other paid-in capital</td><td>2,832</td><td>2,582</td></tr><tr><td>Accumulated other comprehensive income</td><td>—</td><td>2</td></tr><tr><td>Retained earnings</td><td>463</td><td>389</td></tr><tr><td>Total common stockholder&#x27;s equity</td><td>4,136</td><td>3,814</td></tr><tr><td>Preferred stock</td><td>44</td><td>44</td></tr><tr><td>Total equity</td><td>4,180</td><td>3,858</td></tr><tr><td>Total Liabilities and Equity</td><td>$14,839</td><td>$14,622</td></tr></table>



## Consumers Energy Company
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

<table><tr><td rowspan="3"></td><td colspan="3">Years Ended December 31</td></tr><tr><td>2010</td><td>2009</td><td>2008</td></tr><tr><td colspan="3">In Millions</td></tr><tr><td>Common Stock</td><td></td><td></td><td></td></tr><tr><td>At beginning and end of period(a)</td><td>$ 841</td><td>$ 841</td><td>$ 841</td></tr><tr><td>Other Paid-in Capital</td><td></td><td></td><td></td></tr><tr><td>At beginning of period</td><td>2,582</td><td>2,482</td><td>2,482</td></tr><tr><td>Stockholder&#x27;s contribution</td><td>250</td><td>100</td><td>—</td></tr><tr><td>At end of period</td><td>2,832</td><td>2,582</td><td>2,482</td></tr><tr><td>Accumulated Other Comprehensive Income (Loss)</td><td></td><td></td><td></td></tr><tr><td>Retirement benefits liability</td><td></td><td></td><td></td></tr><tr><td>At beginning of period</td><td>(11)</td><td>(7)</td><td>(15)</td></tr><tr><td>Retirement benefits liability adjustments(b)</td><td>—</td><td>—</td><td>6</td></tr><tr><td>Net gain (loss) arising during the period(b)</td><td>(5)</td><td>(4)</td><td>2</td></tr><tr><td>At end of period</td><td>(16)</td><td>(11)</td><td>(7)</td></tr><tr><td>Investments</td><td></td><td></td><td></td></tr><tr><td>At beginning of period</td><td>13</td><td>6</td><td>15</td></tr><tr><td>Unrealized gain (loss) on investments(b)</td><td>3</td><td>10</td><td>(19)</td></tr><tr><td>Reclassification adjustments included in net income(b)</td><td>—</td><td>(3)</td><td>10</td></tr><tr><td>At end of period</td><td>16</td><td>13</td><td>6</td></tr><tr><td>At end of period</td><td>—</td><td>2</td><td>(1)</td></tr><tr><td>Retained Earnings</td><td></td><td></td><td></td></tr><tr><td>At beginning of period</td><td>389</td><td>383</td><td>324</td></tr><tr><td>Effects of changing the retirement plans measurement date</td><td></td><td></td><td></td></tr><tr><td>Service cost, interest cost, and expected return on plan assets for December 1 through December 31, 2007, net of tax</td><td>—</td><td>—</td><td>(4)</td></tr><tr><td>Additional loss from December 1 through December 31, 2007, net of tax</td><td>—</td><td>—</td><td>(2)</td></tr><tr><td>Net income(b)</td><td>434</td><td>293</td><td>364</td></tr><tr><td>Common stock dividends declared</td><td>(358)</td><td>(285)</td><td>(297)</td></tr><tr><td>Preferred stock dividends declared</td><td>(2)</td><td>(2)</td><td>(2)</td></tr><tr><td>At end of period</td><td>463</td><td>389</td><td>383</td></tr><tr><td>Preferred Stock</td><td></td><td></td><td></td></tr><tr><td>At beginning and end of period</td><td>44</td><td>44</td><td>44</td></tr><tr><td>Total Equity</td><td>$4,180</td><td>$3,858</td><td>$3,749</td></tr></table>



(a) Number of shares of common stock outstanding was 84,108,789 for all periods presented.
(b) Disclosure of Comprehensive Income:
Net income ..... $434 $293 $364
Retirement benefits liability
Retirement benefits liability adjustments, net of tax of $2 in 2008 ..... — — 6
Net gain (loss) arising during the period, net of tax (tax benefit) of $(3) in 2010, $(2) in 2009 and $1 in 2008 ..... (5) (4) 2
Investments
Unrealized gain (loss) on investments, net of tax (tax benefit) of $2 in 2010, $6 in 2009, and $(10) in 2008 ..... 3 10 (19)
Reclassification adjustments included in net income, net of tax (tax benefit) of $− in 2010, $(2) in 2009 and $6 in 2008 ..... — (3) 10
Total Comprehensive Income ..... $432 $296 $363



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

## 1: SIGNIFICANT ACCOUNTING POLICIES

Corporate Structure: CMS Energy is an energy company operating primarily in Michigan. It is the parent holding company of several subsidiaries, including Consumers, an electric and gas utility, and CMS Enterprises, primarily a domestic IPP. CMS Energy and Consumers manage their businesses by the nature of services each provides. CMS Energy operates principally in three business segments: electric utility; gas utility; and enterprises, its non-utility investments and operations. Consumers operates principally in two business segments: electric utility and gas utility.

Principles of Consolidation: CMS Energy and Consumers prepare their Consolidated Financial Statements in conformity with GAAP. CMS Energy’s Consolidated Financial Statements comprise CMS Energy, Consumers, CMS Enterprises, and all other entities in which CMS Energy has a controlling financial interest or is the primary beneficiary. Consumers’ Consolidated Financial Statements comprise Consumers and all other entities in which it has a controlling financial interest or is the primary beneficiary. CMS Energy uses the equity method of accounting for investments in companies and partnerships that are not consolidated, where they have significant influence over operations and financial policies but are not the primary beneficiary. CMS Energy and Consumers eliminate intercompany transactions and balances.

Use of Estimates: CMS Energy and Consumers are required to make estimates using assumptions that may affect reported amounts and disclosures. Actual results could differ from those estimates.

CMS Energy and Consumers record estimated liabilities for contingencies in their Consolidated Financial Statements when it is probable that a liability has been incurred and when the amount of loss can be reasonably estimated. For additional details, see Note 5, Contingencies and Commitments.

Revenue Recognition Policy: CMS Energy and Consumers recognize revenue from deliveries of electricity and natural gas, and from the transportation, processing, and storage of natural gas, when services are provided. CMS Energy and Consumers record unbilled revenue for the estimated amount of energy delivered to customers but not yet billed. CMS Energy and Consumers record sales tax net and exclude it from revenue. CMS Energy recognizes revenue on sales of marketed electricity, natural gas, and other energy products at delivery.

Alternative-Revenue Programs: In September 2009, the MPSC approved an energy optimization incentive mechanism that provides a financial incentive if the energy savings of Consumers' customers exceed annual targets established by the MPSC. Consumers accounts for this program as an alternative-revenue program that meets the criteria for recognizing revenue related to the incentive as soon as energy savings exceed the annual targets established by the MPSC.

Under electric and gas rate orders issued by the MPSC in 2009 and 2010, Consumers was granted authority to implement revenue decoupling mechanisms. The electric decoupling mechanism adjusts customer rates to collect or refund the change in marginal revenue arising from the difference between the level of average sales per customer adopted in the electric rate order and actual average sales per customer. The gas decoupling mechanism is similar, but does not adjust customer rates for changes in sales volumes resulting from weather fluctuations. Consumers accounts for these programs as alternative-revenue programs that meet the criteria for recognizing the effects of decoupling adjustments on revenue as electricity and gas are delivered. For details on Consumers' decoupling mechanisms, see Note 6, Regulatory Matters.

Self-Implemented Rates: Unless prohibited by the MPSC upon a showing of good cause, Consumers is allowed to self-implement new energy rates six months after a new rate case filing if the MPSC has not issued an order in the case. The MPSC then has another six months to issue a final order. If the MPSC does not issue an order, the filed rates are considered approved. If the MPSC issues an order, the rates that Consumers self-implemented may be subject to refund, with interest. Consumers recognizes revenue associated with self-implemented rates. If Consumers considers it probable that it will be required to refund a portion of its self-implemented rates, then



# CMS Energy Corporation
Consumers Energy Company

# NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Consumers records a provision for revenue subject to refund. For details on Consumers’ self-implemented rates, see Note 6, Regulatory Matters.

Accounting for Legal Fees: CMS Energy and Consumers expense legal fees as incurred; fees incurred but not yet billed are accrued based on estimates of work performed. This policy also applies to any fees incurred on behalf of employees and officers under indemnification agreements; such fees are billed directly to CMS Energy or Consumers.

Accounting for MISO Transactions: MISO requires the submission of hourly day-ahead and real-time bids and offers for energy at locations across the MISO region. Consumers and CMS ERM account for MISO transactions on a net hourly basis in each of the real-time and day-ahead markets, and they net transactions across all MISO energy market locations. CMS Energy and Consumers record net purchases in a single hour in Purchased and interchange power and net sales in a single hour in Operating Revenue on the Consolidated Statements of Income. They record net sale billing adjustments upon invoice receipt, record expense accruals for future net purchases adjustments based on historical experience, and reconcile accruals to actual expenses upon invoice receipt.

Accounts Receivable: Accounts receivable comprise trade receivables and unbilled receivables. CMS Energy and Consumers record their accounts receivable at cost, which approximates fair value. CMS Energy and Consumers establish an allowance for uncollectible accounts and loan losses based on historical losses, management’s assessment of existing economic conditions, customer trends, and other factors. CMS Energy and Consumers assess late payment fees on trade receivables based on contractual past-due terms established with customers. CMS Energy and Consumers charge off accounts deemed uncollectible to operating expense.

Cash and Cash Equivalents: Cash and cash equivalents include short-term, highly liquid investments with original maturities of three months or less.

Derivative Instruments: CMS Energy and Consumers record derivative contracts that do not qualify for the normal purchases and sales exception at fair value on their Consolidated Balance Sheets. If a derivative qualifies for cash flow hedge accounting, changes in the fair value are recorded in AOCI; otherwise, changes are reported in earnings. For additional details regarding derivative instruments, see Note 10, Derivative Instruments.

Determination of Pension and OPEB MRV of Plan Assets: CMS Energy and Consumers determine the MRV for pension plan assets as the fair value of plan assets on the measurement date, adjusted by the gains or losses that will not be admitted into the MRV until future years. CMS Energy and Consumers reflect each year's gain or loss in the MRV in equal amounts over a five-year period beginning on the date the original amount was determined. CMS Energy and Consumers determine the MRV for OPEB plan assets as the fair value of assets on the measurement date. CMS Energy and Consumers use the MRV in the calculation of net pension and OPEB costs.

Earnings Per Share: CMS Energy calculates basic and diluted EPS using the weighted-average number of shares of common stock and dilutive potential common stock outstanding during the period. Potential common stock, for purposes of determining diluted EPS, includes the effects of dilutive stock options, warrants, and convertible securities. CMS Energy computes the effect on potential common stock using the treasury stock method or the if-converted method, as applicable. Diluted EPS excludes the impact of antidilutive securities, which are those securities resulting in an increase in EPS or a decrease in loss per share. For EPS computations, see Note 8, Earnings Per Share — CMS Energy.

Financial Instruments: CMS Energy and Consumers record debt and equity securities classified as available for sale at fair value as determined from quoted market prices or other observable, market-based inputs. Unrealized gains and losses on these securities are determined on a specific-identification basis. CMS Energy and Consumers report unrealized gains and losses from changes in fair value of the equity securities, net of tax, in equity as part of AOCI, except that unrealized losses determined to be other than temporary are reported in earnings. CMS Energy



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

and Consumers report unrealized gains resulting from changes in fair value of the debt securities, net of tax, in equity as part of AOCI. Unrealized losses on the debt securities, if significant, are considered other than temporary and reported in earnings since these securities are managed by an independent investment manager that can sell the securities at its own discretion. For additional details regarding financial instruments, see Note 9, Financial Instruments.

Impairment of Long-Lived Assets and Equity Method Investments: CMS Energy and Consumers perform tests of impairment if certain triggering events occur, or if there has been a decline in value that may be other than temporary.

CMS Energy and Consumers evaluate long-lived assets held in use for impairment by calculating the undiscounted future cash flows expected to result from the use of the asset and its eventual disposition. If the undiscounted future cash flows are less than the carrying amount, CMS Energy and Consumers recognize an impairment loss equal to the amount by which the carrying amount exceeds the fair value. CMS Energy and Consumers estimate the fair value of the asset using quoted market prices, market prices of similar assets, or discounted future cash flow analyses.

CMS Energy also assesses equity method investments for impairment whenever there has been a decline in value that is other than temporary. This assessment requires CMS Energy to determine the fair value of the equity method investment. CMS Energy determines fair value using valuation methodologies, including discounted cash flows, and assesses the ability of the investee to sustain an earnings capacity that justifies the carrying amount of the investment. CMS Energy records an impairment if the fair value is less than the carrying amount and the decline in value is considered to be other than temporary.

For additional details, see Note 20, Asset Sales, Discontinued Operations, and Impairment Charges.

Inventory: CMS Energy and Consumers use the weighted-average cost method for valuing working gas, recoverable base gas in underground storage facilities, and materials and supplies inventory. CMS Energy and Consumers also use this method for valuing coal inventory, and they classify these amounts as Generating plant fuel stock on their Consolidated Balance Sheets.

CMS Energy and Consumers classify RECs and emission allowances as materials and supplies inventory and use the average cost method to remove amounts from inventory. RECs and emission allowances are used to satisfy compliance obligations related to the generation of power.

CMS Energy and Consumers use the lower-of-cost-or-market method to evaluate inventory for impairment.

Maintenance and Depreciation: CMS Energy and Consumers record property repairs and minor property replacement as maintenance expense. CMS Energy and Consumers record planned major maintenance activities as operating expense unless the cost represents the acquisition of additional long-lived assets or the replacement of an existing long-lived asset.

Consumers depreciates utility property on an asset-group basis, in which it applies a single MPSC-approved depreciation rate to the gross investment in a particular class of property within the electric and gas segments. Consumers performs depreciation studies periodically to determine appropriate group lives. Presented in the following table are the composite depreciation rates for Consumers' segment properties:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td>Electric utility property</td><td>3.0%</td><td>3.0%</td><td>3.0%</td></tr><tr><td>Gas utility property</td><td>2.9%</td><td>2.9%</td><td>3.6%</td></tr><tr><td>Other property</td><td>7.4%</td><td>7.6%</td><td>8.5%</td></tr></table>



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Notes Receivable: EnerBank provides unsecured consumer installment loans for financing home improvements. These loans totaled $385 million, net of an allowance for loan losses of $5 million, at December 31, 2010, and $269 million, net of an allowance for loan losses of $6 million, at December 31, 2009. At December 31, 2010, $10 million of EnerBank's loans were classified as current Notes receivable and $375 million were classified as non-current Notes receivable on CMS Energy's Consolidated Balance Sheets. At December 31, 2009, $1 million of EnerBank's loans were classified as current Notes receivable and $268 million were classified as non-current Notes receivable on CMS Energy's Consolidated Balance Sheets.

The allowance for loan losses is a valuation allowance to reflect probable credit losses. The allowance is increased by the provision for loan losses and decreased by loan charge-offs net of recoveries. Management estimates the allowance balance required using historical loan loss experience, the nature and volume of the portfolio, economic conditions, and other factors. Loans losses are charged against the allowance when the loss is confirmed, but no later than the point at which a loan becomes 120 days past due.

Loans that are 30 days or more past due are considered delinquent. Presented in the following table is the delinquency status of EnerBank’s consumer loans at December 31, 2010:

<table><tr><td>Past Due 30-59 Days</td><td>Past Due 60-89 Days</td><td>Past Due Over 90 Days</td><td>Total Delinquent</td><td>Current</td><td>Total Outstanding</td></tr><tr><td></td><td></td><td>In Millions</td><td></td><td></td><td></td></tr><tr><td>$1</td><td>$1</td><td>$—</td><td>$2</td><td>$383</td><td>$385</td></tr></table>

Plant, Property, and Equipment: CMS Energy and Consumers record plant, property, and equipment at original cost when placed into service. The cost includes labor, material, applicable taxes, overhead such as pension and other benefits, and AFUDC, if applicable. Consumers' plant, property, and equipment is generally recoverable through its general rate making process. For additional details see Note 6, Regulatory Matters.

When utility property is retired or otherwise disposed of in the ordinary course of business, Consumers records the original cost to accumulated depreciation, along with associated cost of removal, net of salvage. CMS Energy and Consumers recognize gains or losses on the retirement or disposal of non-regulated assets in income. Cost of removal collected from customers, but not spent, is recorded as a regulatory liability.

Consumers capitalizes AFUDC on regulated major construction projects, except pollution control facilities on its fossil-fueled power plants, and where financing costs are specifically approved by the MPSC in rates. AFUDC represents the estimated cost of debt and authorized return-on-equity funds used to finance construction additions. Consumers records the offsetting credit as a reduction of interest for the amount representing the borrowed funds component and as Other income for the equity funds component on the Consolidated Statements of Income. When construction is completed and the property is placed in service, Consumers depreciates and recovers the capitalized AFUDC from customers over the life of the related asset. Presented in the following table are Consumers' composite AFUDC capitalization rates:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td>AFUDC capitalization rate</td><td>7.6%</td><td>7.6%</td><td>7.7%</td></tr></table>

CMS Energy and Consumers capitalize the purchase and development of internal-use computer software. These costs are expensed evenly over the estimated useful life of the internal-use computer software. If computer software is integral to computer hardware, then its cost is capitalized and depreciated with the hardware.

The types of costs capitalized are consistent for all periods presented by the financial statements. For additional details on plant, property, and equipment see Note 15, Plant, Property, and Equipment.

Property Taxes: Property taxes are based on the taxable value of Consumers’ real and personal property assessed by local taxing authorities. Consumers record property tax expense over the fiscal year of the taxing



# CMS Energy Corporation
Consumers Energy Company

# NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

authority for which the taxes are levied based on Consumers’ budgeted customer sales. The deferred property tax balance represents the amount of Consumers’ accrued property tax that will be recognized over future governmental fiscal periods.

Reclassifications: CMS Energy and Consumers have reclassified certain prior-period amounts on their Consolidated Financial Statements to conform to the presentation for the current period. These reclassifications did not affect consolidated net income or cash flows for the periods presented.

Restricted Cash and Cash Equivalents: CMS Energy and Consumers have restricted cash and cash equivalents dedicated for repayment of Securitization bonds and for payment under performance guarantees. CMS Energy and Consumers classify these amounts as a current asset, as they relate to payments that could occur within one year.

Unamortized Debt Premium, Discount, and Expense: CMS Energy and Consumers defer premiums, discounts, and issuance costs of long-term debt and amortize those costs over the terms of the debt issues. For the non-regulated portions of CMS Energy’s and Consumers’ businesses, refinancing costs are expensed as incurred. For the regulated portions of CMS Energy’s and Consumers’ businesses, any remaining unamortized premiums, discounts, and issuance costs associated with refinanced debt are amortized over the term of the newly issued debt.

## 2: NEW ACCOUNTING STANDARDS

## IMPLEMENTATION OF NEW ACCOUNTING STANDARDS

SFAS No. 166, Accounting for Transfers of Financial Assets, an amendment of FASB Statement No. 140, codified through ASU No. 2009-16, Transfers and Servicing (Topic 860): Accounting for Transfers of Financial Assets: This standard, which was effective for CMS Energy and Consumers January 1, 2010, removes the concept of a qualifying special-purpose entity from guidance relating to transfers of financial assets and extinguishments of liabilities. It also removes the exceptions from applying guidance relating to VIEs to qualifying special-purpose entities. This standard revises and clarifies when an entity is required to derecognize a financial asset that it has transferred to another entity. It further clarifies how to measure beneficial interests received as proceeds in connection with a transfer of a financial asset, and introduces the concept of a “participating interest,” the conditions of which must be met for a partial asset transfer to qualify for sale accounting treatment. The standard also requires enhanced disclosures related to continuing involvement with financial assets. Under this standard, transactions entered into under Consumers’ revolving accounts receivable sales program, discussed in Note 7, Financings and Capitalization, are accounted for as secured borrowings rather than as sales. CMS Energy and Consumers present outstanding amounts under the program as short-term debt collateralized by accounts receivable.

SFAS No. 167, Amendments to FASB Interpretation No. 46(R), codified through ASU No. 2009-17, Consolidations (Topic 810): Improvements to Financial Reporting by Enterprises Involved with Variable Interest Entities: This standard, which was effective for CMS Energy and Consumers January 1, 2010, amends the criteria used to determine which entity, if any, has a controlling financial interest in a VIE. It replaces the quantitative calculation of risks and rewards with a qualitative approach focused on identifying which entity (1) has the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance and (2) has the obligation to absorb losses of the VIE or the right to receive benefits from the VIE. This standard also requires ongoing assessments of whether an entity is the primary beneficiary of a VIE. Upon implementation of this guidance, CMS Energy concluded that it is the primary beneficiary of CMS Energy Trust I and consolidated the trust in its Consolidated Financial Statements on January 1, 2010. CMS Energy also concluded that it is not the primary beneficiary of T.E.S. Filer City, Grayling, or Genesee and deconsolidated these partnerships in its Consolidated Financial Statements on January 1, 2010. CMS Energy consolidated CMS Energy Trust I at the carrying value that would be recorded had this guidance been effective when CMS Energy initially became involved.



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

with CMS Energy Trust I. CMS Energy recorded its retained interest in the deconsolidated partnerships at the carrying value that would be recorded had this guidance been effective when CMS Energy initially became involved with the partnerships. CMS Energy and Consumers have chosen not to adjust previously reported balances. No cumulative effect adjustments were required. For additional details, see Note 18, Variable Interest Entities.

## 3: OTHER INCOME AND OTHER EXPENSE

Presented in the following table are the components of Other income and Other expense at CMS Energy and Consumers:

Years Ended December 31 2010 2009 2008
In Millions

CMS ENERGY, INCLUDING CONSUMERS

Other income:
Gain on early retirement of long-term debt ..... $ — $ 28 $ —
Regulatory return on capital expenditures ..... 17 26 33
Gain on SERP investment ..... — 8 —
Return on stranded and security costs ..... 4 5 5
Electric restructuring return ..... — — 1
Foreign currency gain ..... — — 2
All other ..... 11 13 7
Total other income ..... $ 32 $ 80 $ 48
Other expense:
Loss on reacquired and extinguished debt ..... $ (8) $ (18) $ —
Unrealized investment loss ..... — — (24)
Donations ..... (6) — —
Civic and political expenditures ..... (3) (3) (5)
All other ..... (7) (9) (8)
Total other expense ..... $ (24) $ (30) $ (37)
Consumers
Other income:
Regulatory return on capital expenditures ..... $ 17 $ 26 $ 33
Gain on SERP investment ..... — 5 —
Return on stranded and security costs ..... 4 5 5
Electric restructuring return ..... — — 1
All other ..... 10 11 6
Total other income ..... $ 31 $ 47 $ 45



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td></td><td></td><td>In Millions</td><td></td></tr><tr><td>Other expense:</td><td></td><td></td><td></td></tr><tr><td>Unrealized investment loss</td><td>$ —</td><td>$ —</td><td>$(16)</td></tr><tr><td>Donations</td><td>(6)</td><td>—</td><td>—</td></tr><tr><td>Civic and political expenditures</td><td>(3)</td><td>(3)</td><td>(5)</td></tr><tr><td>All other</td><td>(6)</td><td>(8)</td><td>(7)</td></tr><tr><td>Total other expense</td><td>$(15)</td><td>$(11)</td><td>$(28)</td></tr></table>

## 4: FAIR VALUE MEASUREMENTS

Accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. When measuring fair value, CMS Energy and Consumers are required to incorporate all assumptions that market participants would use in pricing an asset or liability, including assumptions about risk. A fair value hierarchy prioritizes inputs used to measure fair value according to their observability in the market. The three levels of the fair value hierarchy are as follows:

• Level 1 inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

• Level 2 inputs are observable, market-based inputs, other than Level 1 prices. Level 2 inputs may include quoted prices for similar assets or liabilities in active markets, quoted prices in inactive markets, interest rates and yield curves observable at commonly quoted intervals, credit risks, default rates, and inputs derived from or corroborated by observable market data.

• Level 3 inputs are unobservable inputs that reflect CMS Energy’s or Consumers’ own assumptions about how market participants would value their assets and liabilities.

To the extent possible, CMS Energy and Consumers use quoted market prices or other observable market pricing data in valuing assets and liabilities measured at fair value. If this information is unavailable, they use market-corroborated data or reasonable estimates about market participant assumptions. CMS Energy and Consumers classify fair value measurements within the fair value hierarchy based on the lowest level of input that is significant to the fair value measurement in its entirety.



## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

## Assets and Liabilities Measured at Fair Value on a Recurring Basis

Presented in the following table are CMS Energy’s and Consumers’ assets and liabilities, by level within the fair value hierarchy, reported at fair value on a recurring basis at December 31, 2010:

<table><tr><td rowspan="2"></td><td rowspan="2">Total</td><td>Level 1</td><td>Level 2</td><td>Level 3</td></tr><tr><td colspan="3">In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash equivalents</td><td>$183</td><td>$183</td><td>$—</td><td>$—</td></tr><tr><td>Restricted cash equivalents</td><td>6</td><td>6</td><td>—</td><td>—</td></tr><tr><td>Nonqualified deferred compensation plan assets</td><td>6</td><td>6</td><td>—</td><td>—</td></tr><tr><td>SERP:</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash equivalents</td><td>1</td><td>1</td><td>—</td><td>—</td></tr><tr><td>Mutual fund</td><td>62</td><td>62</td><td>—</td><td>—</td></tr><tr><td>State and municipal bonds</td><td>28</td><td>—</td><td>28</td><td>—</td></tr><tr><td>Derivative instruments:</td><td></td><td></td><td></td><td></td></tr><tr><td>Commodity contracts(a)</td><td>1</td><td>—</td><td>—</td><td>1</td></tr><tr><td>Total(b)</td><td>$287</td><td>$258</td><td>$28</td><td>$1</td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td></tr><tr><td>Nonqualified deferred compensation plan liabilities</td><td>$ 6</td><td>$ 6</td><td>$—</td><td>$—</td></tr><tr><td>Derivative instruments:</td><td></td><td></td><td></td><td></td></tr><tr><td>Commodity contracts(c)</td><td>4</td><td>—</td><td>—</td><td>4</td></tr><tr><td>Total(d)</td><td>$ 10</td><td>$ 6</td><td>$—</td><td>$ 4</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash equivalents</td><td>$ 19</td><td>$ 19</td><td>$—</td><td>$—</td></tr><tr><td>Restricted cash equivalents</td><td>6</td><td>6</td><td>—</td><td>—</td></tr><tr><td>CMS Energy common stock</td><td>34</td><td>34</td><td>—</td><td>—</td></tr><tr><td>Nonqualified deferred compensation plan assets</td><td>4</td><td>4</td><td>—</td><td>—</td></tr><tr><td>SERP:</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash equivalents</td><td>1</td><td>1</td><td>—</td><td>—</td></tr><tr><td>Mutual fund</td><td>39</td><td>39</td><td>—</td><td>—</td></tr><tr><td>State and municipal bonds</td><td>17</td><td>—</td><td>17</td><td>—</td></tr><tr><td>Derivative instruments:</td><td></td><td></td><td></td><td></td></tr><tr><td>Commodity contracts</td><td>1</td><td>—</td><td>—</td><td>1</td></tr><tr><td>Total(e)</td><td>$121</td><td>$103</td><td>$17</td><td>$ 1</td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td></tr><tr><td>Nonqualified deferred compensation plan liabilities</td><td>$ 4</td><td>$ 4</td><td>$—</td><td>$—</td></tr><tr><td>Total</td><td>$ 4</td><td>$ 4</td><td>$—</td><td>$—</td><td></td></tr></table>



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(a) This amount is gross and excludes the impact of offsetting derivative assets and liabilities under master netting arrangements, which was less than $1 million at December 31, 2010.

(b) At December 31, 2010, CMS Energy’s assets classified as Level 3 represented less than one percent of CMS Energy’s total assets measured at fair value.

(c) This amount is gross and excludes the impact of offsetting derivative assets and liabilities under master netting arrangements and offsetting cash margin deposits paid by CMS ERM to other parties, which was less than $1 million at December 31, 2010.

(d) At December 31, 2010, CMS Energy’s liabilities classified as Level 3 represented 40 percent of CMS Energy’s total liabilities measured at fair value. The Level 3 liabilities consisted primarily of an electricity sales agreement held by CMS ERM.

(e) At December 31, 2010, Consumers’ assets classified as Level 3 represented one percent of Consumers’ total assets measured at fair value.

Presented in the following table are CMS Energy’s and Consumers’ assets and liabilities, by level within the fair value hierarchy, reported at fair value on a recurring basis at December 31, 2009:

<table><tr><td></td><td>Total</td><td>Level 1 In Millions</td><td>Level 2</td><td>Level 3</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash equivalents</td><td>$ 57</td><td>$ 57</td><td>$—</td><td>$—</td></tr><tr><td>Restricted cash equivalents</td><td>12</td><td>12</td><td>—</td><td>—</td></tr><tr><td>Nonqualified deferred compensation plan assets</td><td>5</td><td>5</td><td>—</td><td>—</td></tr><tr><td>SERP:</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash equivalents</td><td>49</td><td>49</td><td>—</td><td>—</td></tr><tr><td>State and municipal bonds</td><td>27</td><td>—</td><td>27</td><td>—</td></tr><tr><td>Derivative instruments:</td><td></td><td></td><td></td><td></td></tr><tr><td>Commodity contracts(a)</td><td>1</td><td>—</td><td>1</td><td>—</td></tr><tr><td>Total</td><td>$151</td><td>$123</td><td>$28</td><td>$—</td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td></tr><tr><td>Nonqualified deferred compensation plan liabilities</td><td>$ 5</td><td>$ 5</td><td>$—</td><td>$—</td></tr><tr><td>Derivative instruments:</td><td></td><td></td><td></td><td></td></tr><tr><td>Commodity contracts(b)</td><td>9</td><td>1</td><td>1</td><td>7</td></tr><tr><td>Interest rate contracts</td><td>1</td><td>—</td><td>—</td><td>1</td></tr><tr><td>Total(c)</td><td>$ 15</td><td>$ 6</td><td>$ 1</td><td>$ 8</td></tr></table>



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

<table><tr><td></td><td>Total</td><td>Level 1 In Millions</td><td>Level 2</td><td>Level 3</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash equivalents</td><td>$ 31</td><td>$ 31</td><td>$—</td><td>$—</td></tr><tr><td>Restricted cash equivalents</td><td>5</td><td>5</td><td>—</td><td>—</td></tr><tr><td>CMS Energy common stock</td><td>29</td><td>29</td><td>—</td><td>—</td></tr><tr><td>Nonqualified deferred compensation plan assets</td><td>4</td><td>4</td><td>—</td><td>—</td></tr><tr><td>SERP:</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash equivalents</td><td>30</td><td>30</td><td>—</td><td>—</td></tr><tr><td>State and municipal bonds</td><td>16</td><td>—</td><td>16</td><td>—</td></tr><tr><td>Total</td><td>$115</td><td>$ 99</td><td>$16</td><td>$—</td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td></tr><tr><td>Nonqualified deferred compensation plan liabilities</td><td>$ 4</td><td>$ 4</td><td>$—</td><td>$—</td></tr><tr><td>Total</td><td>$ 4</td><td>$ 4</td><td>$—</td><td>$—</td><td></td></tr></table>

(a) This amount is gross and excludes the $1 million impact of offsetting derivative assets and liabilities under master netting arrangements.

(b) This amount is gross and excludes the $1 million impact of offsetting derivative assets and liabilities under master netting arrangements and the $1 million impact of offsetting cash margin deposits paid by CMS ERM to other parties.

(c) At December 31, 2009, CMS Energy’s liabilities classified as Level 3 represented 53 percent of CMS Energy’s total liabilities measured at fair value. The Level 3 liabilities consisted primarily of an electricity sales agreement held by CMS ERM.

Cash Equivalents: Cash equivalents and restricted cash equivalents consist of money market funds with daily liquidity. The funds invest in U.S. Treasury notes, other government-backed securities, and repurchase agreements collateralized by U.S. Treasury notes.

Nonqualified Deferred Compensation Plan Assets: CMS Energy’s and Consumers’ nonqualified deferred compensation plan assets are invested in various mutual funds. CMS Energy and Consumers value these assets using a market approach, using the daily quoted NAVs provided by the fund managers that are the basis for transactions to buy or sell shares in each fund. CMS Energy and Consumers report these assets in Other non-current assets on their Consolidated Balance Sheets.

SERP Assets: CMS Energy and Consumers value their SERP assets using a market approach, incorporating prices and other relevant information from market transactions. The SERP cash equivalents consist of a money market fund with daily liquidity, which invests in state and municipal securities.

The SERP invests in a short-term, fixed-income mutual fund that holds a variety of debt securities with average maturities of one to three years. The fund invests primarily in investment-grade debt securities but, in order to achieve its investment objective, it may invest a portion of its assets in high-yield securities, foreign debt, and derivative instruments. The fair value of the fund is determined using the daily published NAV, which is the basis for transactions to buy or sell shares in the fund.

The SERP state and municipal bonds are investment grade securities that are valued using a matrix pricing model that incorporates Level 2 market-based information. The fair value of the bonds is derived from various



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

observable inputs, including benchmark yields, reported trades, broker/dealer quotes, bond ratings, and general information on market movements normally considered by market participants when pricing such debt securities. CMS Energy and Consumers report their SERP assets in Other non-current assets on their Consolidated Balance Sheets. For additional details about SERP securities, see Note 9, Financial Instruments.

Nonqualified Deferred Compensation Plan Liabilities: CMS Energy and Consumers value their non-qualified deferred compensation plan liabilities based on the fair values of the plan assets, as they reflect what is owed to the plan participants in accordance with their investment elections. CMS Energy and Consumers report these liabilities in Other non-current liabilities on their Consolidated Balance Sheets.

Derivative Instruments: CMS Energy and Consumers value their derivative instruments using either a market approach that incorporates information from market transactions, or an income approach that discounts future expected cash flows to a present value amount. They use various inputs to value the derivatives depending on the type of contract and the availability of market data. CMS Energy has exchange-traded derivative contracts that are valued based on Level 1 quoted prices in actively traded markets, as well as derivatives that are valued using Level 2 inputs, including commodity market prices, interest rates, credit ratings, default rates, and market-based seasonality factors. CMS Energy and Consumers have classified certain derivatives as Level 3 since the fair value measurements incorporate pricing assumptions that cannot be observed or confirmed through market transactions.

CMS Energy’s derivatives include an electricity sales agreement held by CMS ERM that extends beyond the term for which quoted electricity prices are available. To value this agreement, CMS Energy uses an internally developed model to project future prices. This method incorporates a proprietary forward power pricing curve that is based on forward gas prices and an implied heat rate. CMS Energy also increases the fair value of the liability for this agreement by an amount that reflects the uncertainty of its model. Since the modeling technique is significant to the overall fair value measurement, this agreement is classified as Level 3.

For all fair values other than Level 1 prices, CMS Energy and Consumers incorporate adjustments for the risk of nonperformance. For derivative assets, a credit adjustment is applied against the asset based on the published default rate for the credit rating that CMS Energy and Consumers assign to the counterparty based on an internal credit-scoring model. This model considers various inputs, including the counterparty's financial statements, credit reports, trade press, and other information that would be available to market participants. To the extent that the internal ratings are comparable to credit ratings published by independent rating agencies, the resulting credit adjustment is classified within Level 2. If the internal model results in a rating that is outside of the range of ratings given by the independent agencies and the credit adjustment is significant to the overall valuation, the derivative fair value is classified as Level 3. CMS Energy and Consumers adjust their derivative liabilities downward to reflect the risk of their own nonperformance, based on their published credit ratings. Adjustments for credit risk using the approach outlined within this paragraph are not materially different from the adjustments that would result from using credit default swap rates for the contracts presently held. For additional details about derivative contracts, see Note 10, Derivative Instruments.



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

## Assets and Liabilities Measured at Fair Value on a Recurring Basis using Significant Level 3 Inputs

Presented in the following table is a reconciliation of changes in the fair values of Level 3 assets and liabilities at CMS Energy, which includes Level 3 assets and liabilities at Consumers:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009 In Millions</td><td>2008</td></tr><tr><td>Balance at January 1</td><td>$ (8)</td><td>$ (16)</td><td>$ (19)</td></tr><tr><td>Total gains included in earnings(a)</td><td>8</td><td>17</td><td>2</td></tr><tr><td>Purchases, sales, issuances, and settlements (net)</td><td>(3)</td><td>(9)</td><td>1</td></tr><tr><td>Balance at December 31</td><td>$ (3)</td><td>$ (8)</td><td>$ (16)</td></tr><tr><td>Unrealized gains included in earnings for the years ended December 31 relating to assets and liabilities still held at December 31(a)</td><td>$ 4</td><td>$ 6</td><td>$ 3</td></tr></table>

(a) CMS Energy records realized and unrealized gains and losses for Level 3 recurring fair values in earnings as a component of Operating Revenue, Other income, or Maintenance and other operating expenses on its Consolidated Statements of Income.

Presented in the following table is a reconciliation of changes in the fair values of Level 3 assets and liabilities at Consumers:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009 In Millions</td><td>2008</td></tr><tr><td>Balance at January 1</td><td>$—</td><td>$—</td><td>$—</td></tr><tr><td>Total gains (losses) included in earnings(a)</td><td>4</td><td>10</td><td>(1)</td></tr><tr><td>Purchases, sales, issuances, and settlements (net)</td><td>(3)</td><td>(10)</td><td>1</td></tr><tr><td>Balance at December 31</td><td>$1</td><td>$—</td><td>$—</td></tr><tr><td>Unrealized gains included in earnings for the years ended December 31 relating to assets and liabilities still held at December 31(a)</td><td>$ 1</td><td>$ —</td><td>$—</td></tr></table>

(a) Consumers records realized and unrealized gains and losses for Level 3 recurring fair values in earnings as a component of Other income on its Consolidated Statements of Income.

## Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Presented in the following table are CMS Energy’s assets, by level within the fair value hierarchy, reported at fair value on a nonrecurring basis during the year ended December 31, 2010:

<table><tr><td rowspan="3"></td><td rowspan="3">Level 1</td><td>Level 2</td><td>Level 3</td><td rowspan="3">Gains (Losses)</td></tr><tr><td colspan="2">In Millions</td></tr><tr><td>$—</td><td>$5</td><td>$—</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets held for sale</td><td>$—</td><td>$5</td><td>$—</td><td>$(6)</td></tr></table>

In 2010, CMS Energy wrote down assets held for sale from their carrying amount of $11 million to their fair value of $5 million, resulting in a loss of $6 million, which was recorded in earnings as part of discontinued operations for the year ended December 31, 2010. The fair value was determined based on the price that CMS Energy received for the sale of these assets, which closed in January 2011. The reduction in fair value was due primarily to declines in forward electricity prices. For further information, refer to the discussion of Exeter in Note 20, Asset Sales, Discontinued Operations, and Impairment Charges. Consumers did not have any nonrecurring



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

fair value measurements during the year ended December 31, 2010. Neither CMS Energy nor Consumers had any nonrecurring fair value measurements during the years ended December 31, 2009 and 2008.

## 5: CONTINGENCIES AND COMMITMENTS

## CMS ENERGY CONTINGENCIES

Gas Index Price Reporting Investigation: In 2002, CMS Energy notified appropriate regulatory and governmental agencies that some employees at CMS MST and CMS Field Services appeared to have provided inaccurate information regarding natural gas trades to various energy industry publications, which compile and report index prices. CMS Energy cooperated with an investigation by the DOJ regarding this matter. Although CMS Energy has not received any formal notification that the DOJ has completed its investigation, the DOJ's last request for information occurred in 2003, and CMS Energy completed its response to this request in 2004. CMS Energy is unable to predict the outcome of the DOJ investigation and what effect, if any, the investigation will have on CMS Energy.

Gas Index Price Reporting Litigation: CMS Energy, along with CMS MST, CMS Field Services, Cantera Natural Gas, Inc., and Cantera Gas Company, are named as defendants in various class action and individual lawsuits arising as a result of alleged inaccurate natural gas price reporting to publications that report trade information. Allegations include manipulation of NYMEX natural gas futures and options prices, price-fixing conspiracies, restraint of trade, and artificial inflation of natural gas retail prices in Colorado, Kansas, Missouri, and Wisconsin. The following provides more detail on these proceedings:

• In 2005, CMS MST was served with a summons and complaint that named CMS Energy, CMS MST, and CMS Field Services as defendants in a putative class action filed in Kansas state court, Learjet, Inc., et al. v. Oneok, Inc., et al. The complaint alleges that during the putative class period, January 1, 2000 through October 31, 2002, the defendants engaged in a scheme to violate the Kansas Restraint of Trade Act. The plaintiffs, who allege they purchased natural gas from the defendants and others for their facilities, are seeking statutory full consideration damages consisting of the full consideration paid by plaintiffs for natural gas.

• In 2007, a class action complaint, Heartland Regional Medical Center, et al. v. Oneok, Inc. et al., was filed in Missouri state court alleging violations of Missouri antitrust laws. Defendants, including CMS Energy, CMS Field Services, and CMS MST, are alleged to have violated the Missouri antitrust law in connection with their natural gas price reporting activities.

• Breckenridge Brewery of Colorado, LLC and BBD Acquisition Co. v. Oneok, Inc., et al., a class action complaint brought on behalf of retail direct purchasers of natural gas in Colorado, was filed in Colorado state court in May 2006. Defendants, including CMS Energy, CMS Field Services, and CMS MST, are alleged to have violated the Colorado Antitrust Act of 1992 in connection with their natural gas price reporting activities. Plaintiffs are seeking full refund damages.

• A class action complaint, Arandell Corp., et al. v. XCEL Energy Inc., et al., was filed in 2006 in Wisconsin state court on behalf of Wisconsin commercial entities that purchased natural gas between January 1, 2000 and October 31, 2002. The defendants, including CMS Energy, CMS ERM, and Cantera Gas Company, are alleged to have violated Wisconsin's antitrust statute. The plaintiffs are seeking full consideration damages, plus exemplary damages, and attorneys' fees. After dismissal on jurisdictional grounds in 2009, plaintiffs filed a new case in the U.S. District Court for the Eastern District of Michigan. In November 2010, the MDL judge issued an opinion and order granting the CMS Energy defendants' motion to dismiss the new Michigan case on statute-of-limitations grounds and all CMS Energy defendants have been dismissed from the Arandell Michigan case.



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

• Another class action complaint, Newpage Wisconsin System v. CMS ERM, CMS Energy, and Cantera Gas Company, was filed in 2009 in circuit court in Wood County, Wisconsin, against CMS Energy defendants and 19 other non-CMS Energy companies. The plaintiff is seeking full consideration damages, treble damages, costs, interest, and attorneys’ fees.

• In 2005, J.P. Morgan Trust Company, in its capacity as Trustee of the FLI Liquidating Trust, filed an action in Kansas state court against a number of energy companies, including CMS Energy, CMS MST, and CMS Field Services. The complaint alleges various claims under the Kansas Restraint of Trade Act. The plaintiff is seeking statutory full consideration damages for its purchases of natural gas between January 1, 2000 and December 31, 2001. This case is not a class action.

After removal to federal court, the Learjet, Heartland, Breckenridge, both Arandell cases, Newpage, and J.P. Morgan cases were transferred to the MDL case. CMS Energy was dismissed from the Learjet, Heartland, and J.P. Morgan cases in 2009, but other CMS Energy defendants remain parties. All CMS Energy defendants were dismissed from the Breckenridge case in 2009. It is expected that the plaintiffs in this case will appeal this decision after all claims against defendants have been dismissed. At this time, there is no pending appeal. In June 2010, CMS Energy and Cantera Gas Company were dismissed from the Newpage case; the Arandell (Wisconsin) case was reinstated against CMS ERM; and the Arandell (Wisconsin) case was consolidated with the Newpage case. These two consolidated cases remain pending only against CMS ERM. Pending before the court in all of the MDL cases are the defendants' renewed motions for summary judgment based on FERC preemption. In all but the J.P. Morgan case, there are also pending plaintiffs' motions for class certification. These motions are not yet decided. In October 2010, the MDL court entered an order denying the plaintiffs' motion for leave to amend their complaint to add a federal Sherman Act antitrust claim.

These cases involve complex facts, a large number of similarly situated defendants with different factual positions, and multiple jurisdictions. Presently, any estimate of liability would be highly speculative; the amount of CMS Energy’s possible loss would be based on widely varying models previously untested in this context. Defenses are being pursued vigorously, which could result in the dismissal of the cases completely, but CMS Energy is unable to predict the outcome of these matters. If the outcome is unfavorable, these cases could have a material adverse impact on CMS Energy’s liquidity, financial condition, and results of operations.

Bay Harbor: As part of the development of Bay Harbor by certain subsidiaries of CMS Energy, and under an agreement with the MDNRE, third parties constructed a golf course and park over several abandoned CKD piles left over from the former cement plant operations on the Bay Harbor site. The third parties also undertook a series of response activities, including constructing a leachate collection system in one area where CKD-impacted groundwater was entering Little Traverse Bay. Leachate is produced when water enters into the CKD piles. In 2002, CMS Energy sold its interest in Bay Harbor, but retained its obligations under environmental indemnities entered into at the start of the project.

In 2005, the EPA, along with CMS Land and CMS Capital, voluntarily executed an Administrative Order on Consent under Superfund, and the EPA approved a Removal Action Work Plan to address contamination issues. Collection systems required under the plan have been installed and effectiveness monitoring of the systems at the shoreline is ongoing. CMS Land, CMS Capital, and the EPA agreed upon augmentation measures to address areas where pH measurements were not satisfactory. Several augmentation measures were implemented and completed in 2009, with the remaining measure completed in 2010.

In December 2010, CMS Energy recorded a charge of $40 million to increase the remaining liability for Bay Harbor as a result of recent developments. The factors that contributed to this revision of estimated costs include anticipated cost increases for the disposal of leachate under an NPDES permit issued by the MDNRE in December 2010, additional costs for the scope of remediation to meet EPA and MDNRE requirements, and increased legal, management, and engineering costs anticipated to reach agreement with all parties on the long-term remedy for the



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Bay Harbor site. The NPDES permit issued by the MDNRE authorizes CMS Land to discharge treated leachate into Little Traverse Bay. This permit requires renewal every five years. CMS Land also completed mercury modeling studies as required by the EPA in November 2010. The completion of these studies was necessary to finalize the scope of remedies that was submitted to the EPA in December 2010. Additionally, CMS Land has committed to investigate the potential for a deep injection well on the Bay Harbor site as an alternative long-term solution to the leachate disposal issue. In 2008, the MDNRE and the EPA granted permits for CMS Land or its wholly owned subsidiary, Beeland Group LLC, to construct and operate an off-site deep injection well in Antrim County, Michigan, to dispose of leachate from Bay Harbor. Certain environmental groups, a local township, and a local county filed lawsuits appealing the permits. The legal proceeding was stayed in 2009 and can be renewed by either party at any time.

Various claims have been brought against CMS Land or its affiliates, including CMS Energy, alleging environmental damage to property, loss of property value, insufficient disclosure of environmental matters, breach of agreement relating to access, or other matters. There is presently one lawsuit (Jankowski v. CMS Energy, CMS Capital, and CMS Land) pending that was filed in June 2010 in Emmett County Circuit Court in Michigan relating to such subjects. Resolution of this lawsuit is not expected to have a material impact on CMS Energy’s consolidated income, cash flows, or financial position. In October 2010, CMS Land and other parties received a demand for payment from the EPA in the amount of $7 million, plus interest, whereby the EPA is seeking recovery, as allowed under Superfund, of the EPA’s response costs incurred at the Bay Harbor site. CMS Land believes that this is not a valid claim and intends to dispute it.

CMS Land and CMS Capital, the MDNRE, the EPA, and other parties continue to negotiate the long-term remedy for the Bay Harbor site, including:

• the disposal of leachate;

• the capping and excavation of CKD;

• the location and design of collection lines and upstream water diversion systems;

• application of criteria for various substances such as mercury; and

• other matters that are likely to affect the scope of response activities that CMS Land and CMS Capital may be obligated to undertake.

CMS Energy has recorded a cumulative charge related to Bay Harbor of $222 million, which with accretion expense, includes $43 million recorded in 2010, $37 million in 2009, and $1 million in 2008, in Other operating expenses on the Consolidated Statements of Income. At December 31, 2010, CMS Energy had a recorded liability of $98 million for its remaining obligations. CMS Energy calculated this liability based on discounted projected costs, using a discount rate of 4.34 percent and an inflation rate of one percent on annual operating and maintenance costs. CMS Energy based the discount rate on the interest rate for 30-year U.S. Treasury securities at December 31, 2010. The undiscounted amount of the remaining obligation is $121 million. CMS Energy expects to pay $34 million during 2011, $12 million in 2012, $5 million in 2013, $5 million in 2014, $4 million in 2015, and the remaining amount thereafter on long-term liquid disposal and operating and maintenance costs.

CMS Energy’s estimate of response activity costs and the timing of expenditures could change if there are additional major changes in circumstances or assumptions, including but not limited to:

• inability to complete the present long-term water disposal strategy at a reasonable cost;

• delays in implementing the present long-term water disposal strategy;

• requirements to alter the present long-term water disposal strategy upon expiration of the NPDES permit if the MDNRE or EPA identify a more suitable alternative;



# CMS Energy Corporation
Consumers Energy Company

# NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

• an increase in the number of contamination areas;

• different remediation techniques;

• the nature and extent of contamination;

• inability to reach agreement with the MDNRE or the EPA over additional response activities;

• delays in the receipt of requested permits;

• delays following the receipt of any requested permits due to legal appeals of third parties;

• additional or new legal or regulatory requirements; or

• new or different landowner claims.

Depending on the size of any indemnity obligation or liability under environmental laws, an adverse outcome of this matter could have a material adverse effect on CMS Energy’s liquidity and financial condition and could negatively affect CMS Energy’s financial results. Although a liability for its present estimate of remaining response activity costs has been recorded, CMS Energy cannot predict the ultimate financial impact or outcome of this matter.

State Street Bank and TSU Litigation: In 2002, State Street Bank sued CMS Viron in the District Court of Harris County, Texas, claiming primarily a breach of representations and warranties and seeking $9 million plus interest from CMS Viron. During the same year, CMS Viron filed a counterclaim, as well as third-party actions against TSU, Academic Capital Group, Inc., and Academic Services, Inc. for breach of contract and fiduciary duties and conversion. At December 31, 2010, CMS Energy had a recorded liability of $3 million for its potential obligation related to this matter. This case was resolved in January 2011 for an amount that will not have a material impact on CMS Energy’s consolidated income, cash flows, or financial position.

Equatorial Guinea Tax Claim: In 2004, CMS Energy received a request for indemnification from the purchaser of CMS Oil and Gas. The indemnity claim relates to the sale of CMS Energy’s oil, gas, and methanol projects in Equatorial Guinea and the claim of the government of Equatorial Guinea that CMS Energy owes $142 million in taxes in connection with that sale. CMS Energy concluded that the government’s tax claim is without merit and the purchaser of CMS Oil and Gas submitted a response to the government rejecting the claim. The government of Equatorial Guinea has indicated that it still intends to pursue its claim. CMS Energy cannot predict the financial impact or outcome of this matter.

Marathon Indemnity Claim regarding F.T. Barr Claim: In 2001, F.T. Barr filed a lawsuit in Harris County District Court in Texas against CMS Energy, CMS Oil and Gas, and other defendants alleging that his overriding royalty payments related to Alba field production were improperly calculated. In 2004, all parties signed a confidential settlement agreement that resolved claims between Barr and the defendants. The CMS Energy defendants reserved all defenses to any indemnity claim relating to the settlement.

In April 2009, certain Marathon entities filed a case in the U.S. District Court for the Southern District of Texas against CMS Enterprises for indemnification in connection with this matter. In December 2010, CMS Energy and Marathon signed a confidential settlement agreement that resolved this matter. This settlement did not have a material impact on CMS Energy’s consolidated income, cash flows, or financial position.

Former NOMECO Employees’ Litigation: In June 2010, eight former employees of NOMECO filed a lawsuit in Ingham County Circuit Court in Michigan against CMS Energy and three Marathon entities (Richard Rulewicz, Trustee of the Richard Rulewicz Revocable Living Trust, et al. v. CMS Energy) alleging underpayment of the former employees’ overriding royalty payments related to the Alba field production in Equatorial Guinea, to which the plaintiffs claim to be entitled. CMS Oil and Gas sold its interests in the Alba field to Marathon in 2002. CMS Energy believes that it may be entitled to full or partial indemnification from Marathon for monetary damages.



# CMS Energy Corporation
Consumers Energy Company

# NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

that may arise from this lawsuit. Although CMS Energy cannot predict with certainty the ultimate outcome of this litigation, the resolution of this matter is not expected to have a material adverse impact on CMS Energy’s consolidated income, cash flows, or financial position.

## CONSUMERS' ELECTRIC UTILITY CONTINGENCIES

Electric Environmental Matters: Consumers’ operations are subject to environmental laws and regulations. Generally, Consumers has been able to recover, in customer rates, the costs to operate its facilities in compliance with these laws and regulations.

Cleanup and Solid Waste: Consumers expect to incur remediation and other response activity costs at a number of sites under NREPA. Consumers believes that these costs should be recoverable in rates, but cannot guarantee that outcome. At December 31, 2010, Consumers had a recorded liability of $2 million, its estimated probable NREPA liability.

Consumers is a potentially responsible party at a number of contaminated sites administered under the Superfund. Superfund liability is joint and several. In addition to Consumers, many other creditworthy parties with substantial assets are potentially responsible with respect to the individual sites. In November 2010, Consumers received official notification from the EPA that identified Consumers as a potentially responsible party at the Kalamazoo River Superfund site. The notification claimed that the EPA has reason to believe Consumers disposed of PCBs and arranged for the disposal and treatment of PCB-containing materials at portions of the site. Consumers responded to the EPA in December 2010, stating that it has no information showing that it disposed of PCBs or arranged for disposal or treatment of PCB-containing material at portions of the site and requesting further information from the EPA before Consumers would commit to perform or finance cleanup activities at the site. Until further information is received from the EPA, Consumers is unable to estimate a range of potential liability for cleanup of the river.

Based on its experience, Consumers estimates that its share of the total liability for other known Superfund sites will be between $2 million and $8 million. Various factors, including the number of potentially responsible parties involved with each site, affect Consumers' share of the total liability. At December 31, 2010, Consumers had a recorded liability of $2 million, the minimum amount in the range of its estimated probable Superfund liability.

The timing of payments related to Consumers’ remediation and other response activities at its Superfund and NREPA sites is uncertain. Consumers periodically reviews these cost estimates. Any significant change in the underlying assumptions, such as an increase in the number of sites, different remediation techniques, nature and extent of contamination, and legal and regulatory requirements, could affect its estimates of NREPA and Superfund liability.

Ludington PCB: In 1998, during routine maintenance activities, Consumers identified PCB as a component in certain paint, grout, and sealant materials at Ludington. Consumers removed and replaced part of the PCB material with non-PCB material. Since proposing a plan to take action with respect to the remaining materials, Consumers has had several communications with the EPA. Consumers is not able to predict when the EPA will issue a final ruling and cannot predict the financial impact or outcome of this matter.



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Electric Utility Plant Air Permit Issues and Notices of Violation: In 2007, Consumers received an NOV/FOV from the EPA alleging that fourteen utility boilers exceeded the visible emission limits in their associated air permits. Consumers has responded formally to the NOV/FOV denying the allegations. In addition, in 2008, Consumers received an NOV for three of its coal-fueled facilities alleging, among other things, violations of NSR PSD regulations relating to ten projects from 1986 to 1998 allegedly subject to NSR review. The EPA has alleged that some utilities have classified incorrectly major plant modifications as RMRR rather than seeking permits from the EPA or state regulatory agencies to modify their plants. Consumers responded to the information requests from the EPA on this subject in the past. Consumers believes that it has properly interpreted the requirements of RMRR.

Consumers is engaged in discussions with the EPA on all of these matters. Depending upon the outcome of these discussions, the EPA could bring legal action against Consumers and/or Consumers could be required to install additional pollution control equipment at some or all of its coal-fueled electric generating plants, surrender emission allowances, engage in Supplemental Environmental Projects, and/or pay fines. Additionally, Consumers would need to assess the viability of continuing operations at certain plants. The potential costs relating to these matters could be material and the extent of cost recovery cannot be reasonably estimated. Although Consumers cannot predict the financial impact or outcome of these matters, Consumers expects that it would be able to recover some or all of the costs in rates, consistent with the recovery of other reasonable costs of complying with environmental laws and regulations.

## Nuclear Matters:

DOE Litigation: In 1997, a U.S. Court of Appeals decision confirmed that the DOE was to begin accepting deliveries of spent nuclear fuel for disposal by January 1998. Subsequent U.S. Court of Appeals litigation, in which Consumers and other utilities participated, has not been successful in producing more specific relief for the DOE’s failure to accept the spent nuclear fuel.

A number of court decisions support the right of utilities to pursue damage claims in the U.S. Court of Claims against the DOE for failure to take delivery of spent nuclear fuel. Consumers filed a complaint in 2002. If Consumers’ litigation against the DOE is successful, Consumers plans to use any recoveries as reimbursement for the incurred costs of spent nuclear fuel storage during Consumers’ ownership of Palisades and Big Rock. The sale of Palisades and the Big Rock ISFSI did not transfer the right to any recoveries from the DOE related to costs of spent nuclear fuel storage incurred during Consumers’ ownership of Palisades and Big Rock.

Nuclear Fuel Disposal Cost: Consumers has a recorded liability of $163 million to fund the disposal of spent nuclear fuel used before 1983. This balance comprises the principal amount of $44 million collected from customers for spent nuclear fuel disposal fees and $119 million of interest accrued on those collections. The liability, which is classified in Long-term debt on CMS Energy’s and Consumers’ Consolidated Balance Sheets, is payable to the DOE when it begins to accept delivery of spent nuclear fuel. In conjunction with the sale of Palisades and the Big Rock ISFSI in 2007, Consumers retained this obligation and provided a letter of credit to Entergy as security for this obligation. In its November 2010 electric rate order, the MPSC directed Consumers to establish, within six months of the date of the order, an independent trust fund for the amount payable to the DOE. In December 2010, Consumers filed a Petition for Rehearing and Clarification, requesting that the MPSC modify its conclusion that this amount be placed in a trust.

## CONSUMERS' GAS UTILITY CONTINGENCIES

Gas Environmental Matters: Consumers expects to incur remediation and other response activity costs at a number of sites under the NREPA. These sites include 23 former MGP facilities. Consumers operated the facilities on these sites for some part of their operating lives. For some of these sites, Consumers has no present ownership interest or may own only a portion of the original site. At December 31, 2010, Consumers estimated its undiscounted remaining remediation and other response activity costs to be between $31 million and



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

$46 million. Generally, Consumers has been able to recover most of its costs to date through proceeds from insurance settlements and customer rates.

At December 31, 2010, Consumers had a recorded liability of $31 million and a regulatory asset of $58 million that included $27 million of deferred MGP expenditures. The timing of payments related to the remediation and other response activity at Consumers' former MGP sites is uncertain. Consumers expects its remediation and other response activity costs to average $6 million annually over the next five years. Consumers periodically reviews these cost estimates. Any significant change in the underlying assumptions, such as an increase in the number of sites, changes in remediation techniques, or legal and regulatory requirements, could affect Consumers' estimates of annual response activity costs and the MGP liability.

## GUARANTEES

Presented in the following table are CMS Energy’s guarantees at December 31, 2010:

<table><tr><td>Guarantee Description</td><td>Issue Date</td><td>Expiration Date</td><td>Maximum Obligation</td><td>Carrying Amount</td></tr><tr><td>Indemnity obligations from asset sales and other agreements</td><td>Various</td><td>Various through June 2022</td><td>$512(a)</td><td>$21</td></tr><tr><td>Guarantees and put options(b)</td><td>Various</td><td>Various through December 2011</td><td>36</td><td>1</td></tr></table>

(a) The majority of this amount arises from stock and asset sales agreements under which CMS Energy or a subsidiary of CMS Energy, other than Consumers, indemnified the purchaser for losses resulting from various matters, including claims related to tax disputes, claims related to PPAs, and defects in title to the assets or stock sold to the purchaser by CMS Energy subsidiaries. Except for items described elsewhere in this Note, CMS Energy believes the likelihood of material loss to be remote for the indemnity obligations not recorded as liabilities.

(b) At December 31, 2010, the carrying amount of CMS Land’s put option agreements with certain Bay Harbor property owners was $1 million. If CMS Land is required to purchase a Bay Harbor property under a put option agreement, it may sell the property to recover the amount paid under the put option agreement.

At December 31, 2010, the maximum obligation and carrying amounts for Consumers’ guarantees were less than $1 million.

Presented in the following table is additional information regarding CMS Energy’s guarantees:

<table><tr><td>Guarantee Description</td><td>How Guarantee Arose</td><td>Events That Would Require Performance</td></tr><tr><td>Indemnity obligations from asset sales and other agreements</td><td>Stock and asset sales agreements</td><td>Findings of misrepresentation, breach of warranties, tax claims, and other specific events or circumstances</td></tr><tr><td>Guarantees and put options</td><td>Normal operating activity</td><td>Nonperformance or non-payment by a subsidiary under a related contract</td></tr><tr><td></td><td>Bay Harbor remediation efforts</td><td>Owners exercising put options requiring CMS Land to purchase property</td></tr></table>

CMS Energy, Consumers, and certain other subsidiaries of CMS Energy also enter into various agreements containing tax and other indemnity provisions for which they are unable to estimate the maximum potential



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

obligation. These factors include unspecified exposure under certain agreements. CMS Energy and Consumers consider the likelihood that they would be required to perform or incur substantial losses related to these indemnities to be remote.

## OTHER CONTINGENCIES

In addition to the matters disclosed in this Note and Note 6, Regulatory Matters, there are certain other lawsuits and administrative proceedings before various courts and governmental agencies arising in the ordinary course of business to which CMS Energy, Consumers, and certain other subsidiaries of CMS Energy are parties. These other lawsuits and proceedings may involve personal injury, property damage, contracts, environmental issues, federal and state taxes, rates, licensing, employment, and other matters. Further, CMS Energy and Consumers occasionally self-report certain regulatory non-compliance matters that may or may not eventually result in administrative proceedings. CMS Energy and Consumers believe that the outcome of any one of these proceedings will not have a material adverse effect on their consolidated results of operations, financial condition, or liquidity.

## CONTRACTUAL COMMITMENTS

Purchase Obligations: Presented in the following table are Consumers’ contractual cash obligations at December 31, 2010 for each of the periods shown. CMS Energy did not have any contractual cash obligations at December 31, 2010 that were not included in Consumers’ reported amounts.

<table><tr><td rowspan="3"></td><td rowspan="3">Total</td><td colspan="4">Payments Due</td></tr><tr><td>Less Than One Year</td><td>One to Three Years In Millions</td><td>Three to Five Years</td><td>More Than Five Years</td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td>Consumers</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Purchase obligations</td><td>$15,794</td><td>$1,996</td><td>$2,613</td><td>$1,751</td><td>$9,434</td></tr><tr><td>Purchase obligations — related parties</td><td>1,735</td><td>87</td><td>180</td><td>193</td><td>1,275</td></tr></table>

Purchase obligations are long-term contracts for the purchase of commodities and services. These obligations include operating contracts used to ensure adequate supply with generating facilities that meet PURPA requirements. The commodities and services include natural gas and associated transportation, electricity, and coal and associated transportation.

The MCV PPA: Consumers has a 35-year PPA that began in 1990 with the MCV Partnership to purchase 1,240 MW of electricity. The MCV PPA provides for:

• a capacity charge of $10.14 per MWh of available capacity;

• a fixed energy charge based on Consumers’ annual average baseload coal generating plant operating and maintenance cost, fuel inventory, and average administrative and general expenses;

• a variable energy charge for all delivered energy that reflects the MCV Partnership’s cost of production;

• a $5 million annual contribution by the MCV Partnership to a renewable resources program; and

• an option for Consumers to extend the MCV PPA for five years or purchase the MCV Facility at the conclusion of the MCV PPA’s term in March 2025.

Capacity and energy charges, net of RCP replacement energy and benefits, under the MCV PPA were $285 million in 2010, $246 million in 2009, and $320 million in 2008. Based on a 2008 contract amendment and approval by the MPSC that allows Consumers to manage the contract more cost effectively, Consumers estimates that capacity and energy charges under the MCV PPA will average $320 million annually. These amounts are included in the table above.



# CMS Energy Corporation
Consumers Energy Company

# NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

The Palisades PPA: Consumers has a PPA expiring in 2022 with Entergy to purchase all of the capacity and energy produced by Palisades, up to the annual average capacity of 798 MW. Consumers estimates that capacity and energy payments under the Palisades PPA will average $342 million annually. A portion of these amounts is included in the table above. Consumers’ total purchases of capacity and energy under the PPA were $286 million in 2010, $276 million in 2009, and $298 million in 2008. For further details about Palisades, see Note 14, Leases.

## 6: REGULATORY MATTERS

## RATE MATTERS

Rate matters are critical to Consumers. Depending upon the specific issues, the outcomes of rate cases and proceedings could have a material adverse effect on CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations. Consumers cannot predict the outcome of these proceedings.

## CONSUMERS' ELECTRIC UTILITY

Electric Rate Cases: The MPSC, through a final order and rehearing in Consumers’ 2009 electric rate case, directed Consumers to refund to customers the difference between the rates it self-implemented in May 2009 and the rates authorized in the order, plus interest, subject to a reconciliation proceeding. In August 2010, the MPSC ordered Consumers to refund self-implemented revenue of $16 million to customers. Consumers refunded this amount in September 2010.

In January 2010, Consumers filed an application with the MPSC seeking an annual increase in revenue of $178 million based on an 11 percent authorized return on equity. The filing requested authority to recover new investments in system reliability, environmental compliance, and technology advancements.

In July 2010, Consumers self-implemented an annual electric rate increase of $150 million, subject to refund with interest. Consumers self-implemented $28 million less than it originally requested in order to respond to concerns raised by the MPSC Staff and other intervenors and to provide a balance between the need for investment in Michigan’s infrastructure, which will support economic recovery in the state, and the resulting rate impacts on customers. In its July 2010 order allowing Consumers to self-implement the $150 million increase, the MPSC expressed concern about utilities repeatedly self-implementing rate increases over short time periods, and before the return of previous overcollections of self-implemented rate increases. In August 2010, the Attorney General filed a claim for appeal with the Michigan Court of Appeals regarding the MPSC’s July 2010 order.

In November 2010, the MPSC issued its order in this case, authorizing Consumers to increase its rates in an annual amount of $146 million based on an authorized return on equity of 10.7 percent. Presented in the following table are the components of the electric rate increase authorized by the MPSC and Consumers' self-implemented increase:

<table><tr><td>Components of the increase in revenue</td><td>Increase Authorized by the MPSC</td><td>Consumers&#x27; Self-Implemented Increase</td><td>Difference</td></tr><tr><td>Investment in rate base</td><td>$102</td><td>$106</td><td>$ (4)</td></tr><tr><td>Recovery of operating and maintenance costs</td><td>25</td><td>21</td><td>4</td></tr><tr><td>Cost of capital</td><td>—</td><td>18</td><td>(18)</td></tr><tr><td>Impact of sales declines</td><td>19</td><td>5</td><td>14</td></tr><tr><td>Total</td><td>$146</td><td>$150</td><td>$ (4)</td></tr></table>

The MPSC directed Consumers to refund to customers the difference between the rates it self-implemented in July 2010 and the rates authorized in the November 2010 order, plus interest, subject to a reconciliation proceeding.



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

In February 2011, Consumers filed an application to reconcile the total revenues collected under its self-implemented rates with those that would have been collected under the rates authorized by the MPSC. This reconciliation found that no refund is required.

Power Supply Cost Recovery: The PSCR process is designed to allow Consumers to recover all of its power supply costs if incurred under reasonable and prudent policies and practices. The MPSC reviews these costs, policies, and practices in annual plan and reconciliation proceedings. Consumers adjust its PSCR billing factor monthly in order to minimize the overrecovery or underrecovery amount in the annual PSCR reconciliation.

PSCR Plans: In September 2009, Consumers submitted its 2010 PSCR plan to the MPSC. In accordance with its proposed plan, Consumers self-implemented the 2010 PSCR charge beginning in January 2010. In February 2011, the MPSC issued an order approving Consumers' 2010 PSCR plan with the exception of $5 million of gas supply costs related to Zeeland.

In September 2010, Consumers submitted its 2011 PSCR plan to the MPSC. In accordance with its proposed plan, Consumers self-implemented the 2011 PSCR charge beginning in January 2011.

PSCR Reconciliations: Presented in the following table is the PSCR reconciliation filing pending with the MPSC:

<table><tr><td>PSCR Year</td><td>Date Filed</td><td>Net Underrecovery</td><td>PSCR Cost of Power Sold</td></tr><tr><td>2009</td><td>March 2010</td><td>$39 million(a)</td><td>$1.6 billion</td></tr></table>

(a) In 2005, the MPSC approved an economic development discount for a large industrial customer to promote long-term investments in the industrial infrastructure of Michigan. It was determined in the November 2009 electric rate case order that recovery of this discount should be provided through the electric general rates that Consumers self-implemented in May 2009. That order, however, did not address the recovery of the power-supply component of the discount provided from January 2009 through self-implementation, which totaled $4 million. Consumers has requested recovery of this amount through its 2009 PSCR reconciliation. In this reconciliation, intervenors are seeking disallowances ranging from $11 million to $43 million.

The MPSC issued an order in Consumers’ 2007 PSCR reconciliation in March 2010. In April 2010, Consumers filed for a rehearing in its reconciliation, asking the MPSC to reconsider its decision to disallow recovery of a $2 million economic development discount provided in 2007 to the large industrial customer. In June 2010, the MPSC denied Consumers’ petition for rehearing. In July 2010, Consumers filed a claim for appeal with the Michigan Court of Appeals regarding the MPSC’s decision to disallow recovery of the economic development discount. In January 2011, the Michigan Court of Appeals dismissed Consumers’ claim.

The MPSC issued an order in Consumers’ 2008 PSCR reconciliation in June 2010. In July 2010, Consumers filed for a rehearing in its 2008 PSCR reconciliation, asking the MPSC to reconsider its decision to disallow recovery of a $3 million economic development discount. In January 2011, the MPSC denied Consumers’ petition for rehearing.

Electric Operation and Maintenance Expenditures Show-Cause Order: In December 2005, the MPSC authorized Consumers to increase its electric rates. In the same order, the MPSC ordered Consumers to spend certain amounts on future tree-trimming and line-clearing activities, as well as on the operation and maintenance of Consumers' fossil-fueled power plants. At that time, the MPSC also ordered Consumers to establish mechanisms to track these expenditures and stated that the rate increase was subject to refund with interest if the specified amounts were not spent on these activities.



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

In October 2009, the MPSC issued a show-cause order alleging that, in 2007, Consumers spent $14 million less on forestry and fossil-fueled plant operation and maintenance activity than the amount ordered by the MPSC and that Consumers had not refunded this amount to customers. The order directed Consumers to explain why it should not be found in violation of the MPSC’s December 2005 order and subjected to applicable sanctions, and why the refunds required by that order had not yet occurred. Consumers’ response indicated that the total amount it spent on forestry and fossil-fueled plant operation and maintenance activity for the years 2006 through 2009 exceeded the total amounts included in rates for these activities.

In March 2010, the MPSC Staff requested that the MPSC find Consumers in violation of the December 2005 order and that the MPSC order Consumers to refund $27 million for failure to meet annual spending requirements during 2007 and 2008. Consumers filed a response, stating that it would be unreasonable and unlawful to order a refund of this amount and that Consumers’ expenditures were consistent with the MPSC’s orders. In March 2010, the administrative law judge’s proposal for decision found Consumers’ expenditures to be prudent and that Consumers did not violate the December 2005 order. The administrative law judge recommended that the MPSC find that no violation of the December 2005 order occurred and that no refunds be made to customers.

Electric Depreciation: In February 2010, Consumers filed an electric depreciation case related to its wholly owned electric utility property. As ordered by the MPSC, Consumers prepared a traditional cost-of-removal study, which supported a $46 million increase in annual depreciation expense.

Also in February 2010, Consumers filed an electric depreciation case for Ludington, the pumped-storage plant jointly owned by Consumers and Detroit Edison. This case, filed jointly with Detroit Edison, requests an increase in annual depreciation expense. Consumers’ share of this increase is $9 million annually.

Wind Plant Depreciation: In January 2011, Consumers filed an application with the MPSC seeking approval of depreciation rates for facilities to be installed in connection with Consumers' plans to construct a 100-MW wind farm, Lake Winds Energy Park, in Mason County, Michigan. This case requests an increase of $10 million in annual depreciation expense associated with these wind power production facilities.

Renewable Energy Plan: In June 2010, Consumers filed its first annual report and reconciliation for its renewable energy plan with the MPSC, requesting approval of Consumers' reconciliation of renewable energy plan costs for 2009.

In February 2011, Consumers filed an amended renewable energy plan to reduce the amount recoverable from customers. Consumers proposed the amendment as a result of lower-than-anticipated costs to comply with the renewable energy requirements prescribed by the 2008 Energy Legislation.

Energy Optimization Plan: In April 2010, Consumers filed its first annual report and reconciliation for its energy optimization plan with the MPSC, requesting approval of Consumers' reconciliation of energy optimization plan costs for 2009. Consumers also requested approval to collect $6 million from customers as an incentive payment for achieving savings targets under both its gas and electric energy optimization plans during 2009.

During 2010, Consumers achieved 137 percent of its electric savings target and 124 percent of its gas savings target. For achieving these savings levels, Consumers will request the MPSC’s approval to collect $8 million, the maximum incentive, in the energy optimization reconciliation to be filed in April 2011.

As one of the conditions to the continuation of the electric and gas decoupling mechanisms, Consumers must exceed the statutory savings targets specified in the 2008 Energy Legislation for 2011 through 2014. In December 2010, the MPSC approved Consumers’ amended energy optimization plan to recover the additional spending necessary to exceed these savings targets.



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

## CONSUMERS' GAS UTILITY

Gas Rate Cases: In May 2010, the MPSC authorized Consumers to implement an annual rate increase of $66 million, based on an authorized return on equity of 10.55 percent. In December 2010, the MPSC directed Consumers to refund $11 million to customers for the difference between the rates it self-implemented in November 2009 and the rates authorized by the MPSC in its order, plus interest, in January 2011.

In August 2010, Consumers filed an application with the MPSC seeking an annual increase in revenue of $55 million based on an 11 percent authorized return on equity. The filing requested recovery for investments made to enhance safety, system reliability, and operational efficiencies that improve service to customers. In January 2011, the MPSC Staff recommended a revenue increase of $5 million, based on a 10.1 percent return on equity.

In January 2011, Consumers filed testimony and exhibits with the MPSC in support of a self-implemented annual gas rate increase of $48 million, subject to refund with interest. In February 2011, Consumers filed a letter with the MPSC revising the proposed self-implemented increase to $29 million. The MPSC issued an order in February 2011, delaying Consumers' self-implementation in order to give other parties to the proceeding an opportunity to respond to Consumers' revised self-implementation filing.

Presented in the following table are the components of the rate increase recommended by the MPSC Staff and the self-implemented increase proposed by Consumers:

<table><tr><td rowspan="2">Components of the increase in revenue</td><td rowspan="2">Increase Recommended by the MPSC Staff</td><td colspan="2">Consumers&#x27; Proposed Self-Implemented Increase</td><td rowspan="2">Difference</td></tr><tr><td colspan="2">In Millions</td></tr><tr><td>Investment in rate base</td><td>$ 25</td><td>$28</td><td>$ (3)</td><td></td></tr><tr><td>Recovery of operating and maintenance costs</td><td>2</td><td>7</td><td>(5)</td><td></td></tr><tr><td>Cost of capital</td><td>(20)</td><td>(9)</td><td>(11)</td><td></td></tr><tr><td>Impact of sales declines</td><td>(2)</td><td>3</td><td>(5)</td><td></td></tr><tr><td>Total</td><td>$ 5</td><td>$29</td><td>$(24)</td><td></td></tr></table>

Gas Cost Recovery: The GCR process is designed to allow Consumers to recover all of its purchased natural gas costs if incurred under reasonable and prudent policies and practices. The MPSC reviews these costs, policies, and practices in annual plan and reconciliation proceedings. Consumers adjust its GCR billing factor monthly in order to minimize the overrecovery or underrecovery amount in the annual GCR reconciliation.

GCR Plans: In March 2010, the MPSC authorized Consumers to implement its 2009-2010 base GCR factor and generally approved Consumers' plan.

In December 2010, the MPSC authorized Consumers to implement its 2010-2011 base GCR factor with certain adjustments to its purchasing guidelines and contingent cost recovery methodology.

In December 2010, Consumers filed an application with the MPSC seeking approval of its GCR plan for the 2011-2012 GCR plan year. Consumers plans to self-implement its filed GCR plan factor in April 2011.

GCR Reconciliation: Presented in the following table is the GCR reconciliation filing pending with the MPSC:

<table><tr><td>GCR Year</td><td>Date Filed</td><td>Net Overrecovery</td><td>GCR Cost of Gas Sold</td></tr><tr><td>2009-2010</td><td>June 2010</td><td>$1 million</td><td>$1.3 billion</td></tr></table>



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

In November 2010, the MPSC issued an order in Consumers’ 2008-2009 GCR reconciliation approving full recovery of $1.8 billion in gas costs, and authorized Consumers to roll into its 2009-2010 GCR plan the underrecovery of $16 million.

## Regulatory Assets and Liabilities

Consumers is subject to the actions of the MPSC and FERC and prepares its Consolidated Financial Statements in accordance with the provisions of regulatory accounting. A utility must apply regulatory accounting when its rates are designed to recover specific costs of providing regulated services. Under regulatory accounting, Consumers records regulatory assets or liabilities for certain transactions that would have been treated as expense or revenue by non-regulated businesses.

Consumers reflected the following regulatory assets and liabilities, which included both current and non-current amounts, on its Consolidated Balance Sheets:

<table><tr><td>December 31</td><td>End of Recovery or Refund Period</td><td>2010</td><td>2009</td></tr><tr><td>Regulatory Assets:</td><td></td><td></td><td>In Millions</td></tr><tr><td>Postretirement benefits (Note 11)(a)</td><td>various</td><td>$1,383</td><td>$1,464</td></tr><tr><td>Securitized costs (Note 7)(b)</td><td>2015</td><td>310</td><td>364</td></tr><tr><td>ARO (Note 16)(b)</td><td>various</td><td>107</td><td>100</td></tr><tr><td>Big Rock nuclear decommissioning and related costs(b)(c)</td><td>n/a</td><td>85</td><td>85</td></tr><tr><td>MGP sites (Note 5)(a)</td><td>2020</td><td>58</td><td>63</td></tr><tr><td>Unamortized debt costs(b)</td><td>n/a</td><td>52</td><td>56</td></tr><tr><td>Stranded costs(d)</td><td>2013</td><td>46</td><td>67</td></tr><tr><td>Decoupling mechanisms(d)(e)</td><td>n/a</td><td>39</td><td>5</td></tr><tr><td>Energy optimization plan incentive(b)(f)</td><td>various</td><td>14</td><td>6</td></tr><tr><td>Uncollectible expense tracking mechanism(d)(g)</td><td>n/a</td><td>3</td><td>6</td></tr><tr><td>Customer Choice Act(d)</td><td>2013</td><td>2</td><td>42</td></tr><tr><td>Other(d)(h)</td><td>various</td><td>13</td><td>52</td></tr><tr><td>Total regulatory assets(i)</td><td></td><td>$2,112</td><td>$2,310</td></tr><tr><td>Regulatory Liabilities:</td><td></td><td></td><td></td></tr><tr><td>Cost of removal(j)</td><td>various</td><td>$1,311</td><td>$1,247</td></tr><tr><td>Income taxes, net (Note 12)</td><td>various</td><td>410</td><td>529</td></tr><tr><td>ARO (Note 16)</td><td>various</td><td>122</td><td>130</td></tr><tr><td>Renewable energy plan(k)</td><td>n/a</td><td>101</td><td>25</td></tr><tr><td>Energy optimization plan(k)</td><td>n/a</td><td>34</td><td>6</td></tr><tr><td>Self-implemented rate refunds(l)</td><td>2011</td><td>14</td><td>18</td></tr><tr><td>Refund of revenue in excess of nuclear decommissioning costs(m)</td><td>2011</td><td>7</td><td>86</td></tr><tr><td>Palisades refund(n)</td><td>2011</td><td>2</td><td>85</td></tr><tr><td>Other(h)</td><td>various</td><td>9</td><td>10</td></tr><tr><td>Total regulatory liabilities(i)</td><td></td><td>$2,010</td><td>$2,136</td></tr></table>



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(a) The regulatory assets associated with postretirement benefits and MGP sites are offset partially by liabilities. The net amount is included in rate base (or is expected to be included, for costs incurred subsequent to the most recently approved rate case), thereby providing a return.

(b) These regulatory assets represent incurred costs for which the MPSC has provided, or Consumers expects, recovery without a return on investment.

(c) Consumers paid $30 million to Entergy to assume ownership and responsibility for the Big Rock ISFSI, and incurred $55 million for nuclear fuel storage costs as a result of the DOE’s failure to accept spent nuclear fuel. Consumers is seeking recovery of these costs from the DOE.

(d) These regulatory assets either are included in rate base (or are expected to be included, for costs incurred subsequent to the most recently approved rate case), thereby providing a return on incurred costs, or provide a specific return on investment authorized by the MPSC.

(e) A decoupling mechanism, authorized by the MPSC in Consumers’ 2009 electric rate case order and extended in the 2010 electric rate case order, allows Consumers to adjust future electric rates to compensate for changes in sales volumes resulting from weather fluctuations, energy efficiency, and conservation. Various parties have filed appeals concerning the electric decoupling mechanism. At December 31, 2010, Consumers had a $28 million non-current regulatory asset recorded for electric decoupling. At December 31, 2009, Consumers had a $5 million non-current regulatory asset recorded for electric decoupling. Consumers plans to file its first annual electric decoupling mechanism reconciliation in March 2011.

Also, in its May 2010 gas rate order, the MPSC authorized Consumers to adopt a gas decoupling mechanism, which is similar to the electric decoupling mechanism except that it does not compensate for changes in sales volumes resulting from weather fluctuations. At December 31, 2010, Consumers had an $11 million non-current regulatory asset recorded for gas decoupling. Consumers plans to file its first annual gas decoupling mechanism reconciliation in September 2011.

(f) In 2009 and 2010, Consumers exceeded annual energy savings targets established by the MPSC and, therefore, qualified for financial incentives. For achieving 2009 targets, Consumers requested $6 million from the MPSC through the energy optimization reconciliation case filed in April 2010. Consumers will request $8 million, the maximum incentive for achieving 2010 targets, from the MPSC through the energy optimization reconciliation to be filed in April 2011. Consumers reported the 2009 and 2010 incentives in non-current regulatory assets.

(g) In its November 2009 electric rate order, the MPSC authorized an uncollectible expense tracking mechanism, which allowed future rates to be adjusted to collect or refund 80 percent of the difference between the level of electric uncollectible expense included in rates and actual uncollectible expense. Various parties have filed appeals concerning the uncollectible expense tracking mechanism. In its November 2010 electric rate order, the MPSC terminated the uncollectible expense tracking mechanism as of November 2010 and ordered Consumers to file its reconciliation for the entire period of the tracker in March 2011.

(h) At December 31, 2010 and 2009, other regulatory assets included electric restructuring implementation costs, a gas inventory regulatory asset, and OPEB and pension expense incurred in excess of the MPSC-approved amounts. Consumers will recover these regulatory assets from its customers. Other regulatory liabilities included AFUDC collected in excess of the MPSC-approved amount.

(i) At December 31, 2010, Consumers had $19 million of regulatory assets classified as current regulatory assets and $22 million of regulatory liabilities classified as current regulatory liabilities. At December 31, 2009, Consumers had $19 million of regulatory assets classified as current regulatory assets and $145 million of regulatory liabilities classified as current regulatory liabilities.



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(j) Consumers records a non-current regulatory liability for the amounts collected from customers to fund future asset removal costs.

(k) At December 31, 2010 and 2009, surcharges collected from customers to fund Consumers' renewable energy plan and energy optimization plan exceeded Consumers' spending. These excess amounts are reported in the non-current portion of regulatory liabilities, as the period in which Consumers will spend the surcharges collected is beyond one year. The regulatory liability related to the renewable energy plan will be amortized as costs are incurred to operate and depreciate Consumers' planned wind farms and as Consumers purchases RECs under renewable energy purchase agreements. Consumers expects its first wind farm, Lake Winds Energy Park, to be operational in late 2012. Delivery of RECs under the majority of Consumers' renewable energy purchase agreements is also expected to begin during 2012.

(1) At December 31, 2010, Consumers had a $3 million regulatory liability recorded related to its self-implemented electric rates and an $11 million regulatory liability recorded related to its self-implemented gas rates. At December 31, 2009, Consumers had a $17 million regulatory liability recorded related to its self-implemented electric rates.

(m) The MPSC and FERC regulate the recovery of Consumers’ costs to decommission Big Rock. Subsequent to 2000, Consumers stopped funding a Big Rock trust fund because the collection period for an MPSC-authorized decommissioning surcharge expired on that date. The level of funds provided by the trust fell short of the amount needed to complete decommissioning and Consumers provided $44 million of corporate contributions for decommissioning costs.

In an order issued in February 2010, the MPSC concluded that certain revenues collected during a statutory rate freeze from 2001 through 2003 should have been deposited in a decommissioning trust fund. The MPSC agreed that Consumers was entitled to recover $44 million of decommissioning costs, but concluded that Consumers had collected this amount previously through the rates in effect during the rate freeze. In April 2010, the MPSC ordered Consumers to refund $85 million of revenue collected in excess of decommissioning costs plus interest, over seven months beginning in July 2010. At December 31, 2010, a $7 million regulatory liability remained to be refunded. Consumers completed this refund in January 2011. Consumers filed an appeal with the Michigan Court of Appeals in March 2010 to dispute the MPSC's conclusion that the collections received during the rate freeze should be subject to refund.

(n) In 2009, the MPSC required Consumers to distribute to customers proceeds from the Palisades and Big Rock ISFSI sale transaction and Palisades decommissioning fund balances.

Consumers’ PSCR and GCR mechanisms also represent probable future revenues that will be recovered from customers or previously collected revenues that will be refunded to customers through the ratemaking process. Underrecoveries are included in Accrued power supply and overrecoveries are included in Accrued rate refunds on Consumers’ Consolidated Balance Sheets.

Consumers reflected the following regulatory assets and liabilities for PSCR and GCR underrecoveries and overrecoveries on its Consolidated Balance Sheets:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td></tr><tr><td></td><td>In Millions</td><td></td></tr><tr><td>Regulatory assets for PSCR and GCR underrecoveries</td><td>$15</td><td>$48</td></tr><tr><td>Regulatory liabilities for PSCR and GCR overrecoveries</td><td>$19</td><td>$21</td></tr></table>



## 7: FINANCINGS AND CAPITALIZATION

Presented in the following table is CMS Energy’s Long-term debt at December 31:

<table><tr><td rowspan="2"></td><td rowspan="2">Interest Rate (%)</td><td rowspan="2">Maturity</td><td>2010</td><td>2009</td></tr><tr><td colspan="2">In Millions</td></tr><tr><td>CMS ENERGY</td><td></td><td></td><td></td><td></td></tr><tr><td>Senior notes</td><td>7.750</td><td>2010</td><td>$ —</td><td>$ 67</td></tr><tr><td></td><td>8.500</td><td>2011</td><td>146</td><td>214</td></tr><tr><td></td><td>6.300</td><td>2012</td><td>50</td><td>150</td></tr><tr><td></td><td>Variable(a)</td><td>2013</td><td>150</td><td>150</td></tr><tr><td></td><td>6.875</td><td>2015</td><td>125</td><td>125</td></tr><tr><td></td><td>4.250</td><td>2015</td><td>250</td><td>—</td></tr><tr><td></td><td>6.550</td><td>2017</td><td>250</td><td>250</td></tr><tr><td></td><td>5.050</td><td>2018</td><td>250</td><td>—</td></tr><tr><td></td><td>8.750</td><td>2019</td><td>300</td><td>300</td></tr><tr><td></td><td>6.250</td><td>2020</td><td>300</td><td>—</td></tr><tr><td></td><td>3.375(b)</td><td>2023</td><td>4</td><td>140</td></tr><tr><td></td><td>2.875(b)</td><td>2024</td><td>288</td><td>288</td></tr><tr><td></td><td>5.500(b)</td><td>2029</td><td>172</td><td>172</td></tr><tr><td></td><td></td><td></td><td>$2,285</td><td>$1,856</td></tr><tr><td>Revolving credit facility</td><td></td><td></td><td>—</td><td>25</td></tr><tr><td>Total — CMS Energy</td><td></td><td></td><td>$2,285</td><td>$1,881</td></tr><tr><td>Consumers</td><td></td><td></td><td>$4,529</td><td>$4,411</td></tr><tr><td>OTHER CMS ENERGY SUBSIDIARIES</td><td></td><td></td><td></td><td></td></tr><tr><td>EnerBank brokered certificates of deposit</td><td>1.707(c)</td><td>2011-2018</td><td>363</td><td>214</td></tr><tr><td>Genesee tax exempt bonds(e)</td><td>7.500</td><td>2011-2021</td><td>—</td><td>54</td></tr><tr><td>Grayling tax exempt bonds(e)</td><td>Variable(d)</td><td>2011-2012</td><td>—</td><td>15</td></tr><tr><td>Trust Preferred Securities</td><td>7.750</td><td>2027</td><td>29</td><td>—</td></tr><tr><td>Total — other CMS Energy subsidiaries</td><td></td><td></td><td>$ 392</td><td>$ 283</td></tr><tr><td>Long-term debt — related parties</td><td>7.750</td><td>2027</td><td>$ —</td><td>$ 34</td></tr><tr><td>Total CMS Energy principal amount outstanding</td><td></td><td></td><td>$7,206</td><td>$6,609</td></tr><tr><td>Current amounts</td><td></td><td></td><td>(726)</td><td>(672)</td></tr><tr><td>Net unamortized discount</td><td></td><td></td><td>(32)</td><td>(42)</td></tr><tr><td>Total CMS Energy Long-term debt</td><td></td><td></td><td>$6,448</td><td>$5,895</td></tr></table>

(a) CMS Energy’s variable-rate senior notes bear interest at three-month LIBOR plus 95 basis points (1.239 percent at December 31, 2010 and 1.234 percent at December 31, 2009).

(b) CMS Energy’s contingently convertible notes. See the “Contingently Convertible Securities” section in this Note for further discussion of the conversion features.

(c) The weighted-average interest rate for EnerBank’s brokered certificates of deposit was 1.707 percent at December 31, 2010 and 2.727 percent at December 31, 2009. EnerBank sells these deposits through investment brokers in large pools, with each certificate within the pool having a face value of $1,000. They cannot be withdrawn until maturity, except in the case of death or incompetence of the holder.

(d) The interest rate for Grayling’s variable-rate tax-exempt bonds was 0.270 percent at December 31, 2009.

(e) Genesee and Grayling were deconsolidated as of January 1, 2010. For details, see Note 18, Variable Interest Entities.



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following table is Consumers’ Long-term debt at December 31:

<table><tr><td></td><td>Interest Rate (%)</td><td>Maturity</td><td>2010</td><td>2009</td></tr><tr><td></td><td></td><td></td><td colspan="2">In Millions</td></tr><tr><td>Consumers</td><td></td><td></td><td></td><td></td></tr><tr><td>FMBs(a).</td><td>4.000</td><td>2010</td><td>$ —</td><td>$ 250</td></tr><tr><td></td><td>5.000</td><td>2012</td><td>300</td><td>300</td></tr><tr><td></td><td>5.375</td><td>2013</td><td>375</td><td>375</td></tr><tr><td></td><td>6.000</td><td>2014</td><td>200</td><td>200</td></tr><tr><td></td><td>5.000</td><td>2015</td><td>225</td><td>225</td></tr><tr><td></td><td>2.600</td><td>2015</td><td>50</td><td>—</td></tr><tr><td></td><td>5.500</td><td>2016</td><td>350</td><td>350</td></tr><tr><td></td><td>5.150</td><td>2017</td><td>250</td><td>250</td></tr><tr><td></td><td>3.210</td><td>2017</td><td>100</td><td>—</td></tr><tr><td></td><td>5.650</td><td>2018</td><td>250</td><td>250</td></tr><tr><td></td><td>6.125</td><td>2019</td><td>350</td><td>350</td></tr><tr><td></td><td>6.700</td><td>2019</td><td>500</td><td>500</td></tr><tr><td></td><td>5.650</td><td>2020</td><td>300</td><td>300</td></tr><tr><td></td><td>3.770</td><td>2020</td><td>100</td><td>—</td></tr><tr><td></td><td>5.300</td><td>2022</td><td>250</td><td>—</td></tr><tr><td></td><td>5.650</td><td>2035</td><td>—</td><td>139</td></tr><tr><td></td><td>5.800</td><td>2035</td><td>175</td><td>175</td></tr><tr><td></td><td>6.170</td><td>2040</td><td>50</td><td>—</td></tr><tr><td></td><td>4.970</td><td>2040</td><td>50</td><td>—</td></tr><tr><td></td><td></td><td></td><td>$3,875</td><td>$3,664</td></tr><tr><td>Senior notes</td><td>6.875</td><td>2018</td><td>180</td><td>180</td></tr><tr><td>Securitization bonds</td><td>5.613(b)</td><td>2011-2015</td><td>208</td><td>243</td></tr><tr><td>Nuclear fuel disposal liability to DOE</td><td>(c)</td><td>(c)</td><td>163</td><td>163</td></tr><tr><td>Tax-exempt pollution control revenue bonds</td><td>Various</td><td>2018-2035</td><td>103</td><td>161</td></tr><tr><td>Total Consumers principal amount outstanding</td><td></td><td></td><td>$4,529</td><td>$4,411</td></tr><tr><td>Current amounts</td><td></td><td></td><td>(37)</td><td>(343)</td></tr><tr><td>Net unamortized discount</td><td></td><td></td><td>(4)</td><td>(5)</td></tr><tr><td>Total Consumers Long-term debt</td><td></td><td></td><td>$4,488</td><td>$4,063</td></tr></table>

(a) The weighted-average interest rate for Consumers’ FMBs was 5.517 percent at December 31, 2010 and 5.583 percent at December 31, 2009.

(b) The weighted-average interest rate for Consumers’ Securitization bonds was 5.613 percent at December 31, 2010 and 5.566 percent at December 31, 2009.

(c) The interest rate for Consumers’ nuclear fuel disposal liability was 0.132 percent at December 31, 2010 and 0.117 percent at December 31, 2009. The interest rate is based on the 13-week Treasury Bill rate. The maturity date of the nuclear fuel disposal liability is uncertain. For additional details, see the “Consumers’ Electric Utility Contingencies — Nuclear Matters — Nuclear Fuel Disposal Cost” section included in Note 5, Contingencies and Commitments.



## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Financings: Presented in the following table is a summary of significant long-term debt transactions during 2010:

<table><tr><td></td><td>Principal (In Millions)</td><td>Interest Rate</td><td>Issue/Retirement Date</td><td>Maturity Date</td></tr><tr><td>DEBT ISSUANCES:</td><td></td><td></td><td></td><td></td></tr><tr><td>CMS ENERGY</td><td></td><td></td><td></td><td></td></tr><tr><td>Senior notes</td><td>$300</td><td>6.25%</td><td>January 2010</td><td>February 2020</td></tr><tr><td>Senior notes</td><td>250</td><td>4.25%</td><td>September 2010</td><td>September 2015</td></tr><tr><td>Senior notes(a)</td><td>250</td><td>5.05%</td><td>November 2010</td><td>February 2018</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>FMBs</td><td>250</td><td>5.30%</td><td>September 2010</td><td>September 2022</td></tr><tr><td>FMBs</td><td>50</td><td>6.17%</td><td>September 2010</td><td>September 2040</td></tr><tr><td>FMBs</td><td>50</td><td>2.60%</td><td>October 2010</td><td>October 2015</td></tr><tr><td>FMBs</td><td>100</td><td>3.21%</td><td>October 2010</td><td>October 2017</td></tr><tr><td>FMBs</td><td>100</td><td>3.77%</td><td>October 2010</td><td>October 2020</td></tr><tr><td>FMBs</td><td>50</td><td>4.97%</td><td>October 2010</td><td>October 2040</td></tr><tr><td>DEBT RETIREMENTS:</td><td></td><td></td><td></td><td></td></tr><tr><td>CMS ENERGY</td><td></td><td></td><td></td><td></td></tr><tr><td>Senior notes</td><td>$67</td><td>7.75%</td><td>August 2010</td><td>August 2010</td></tr><tr><td>Senior notes(b)</td><td>100</td><td>6.30%</td><td>December 2010</td><td>February 2012</td></tr><tr><td>Senior notes(c)</td><td>68</td><td>8.50%</td><td>December 2010</td><td>April 2011</td></tr><tr><td>Contingently convertible senior notes(a)</td><td>136</td><td>3.375%</td><td>August and December 2010</td><td>July 2023</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>FMBs</td><td>250</td><td>4.00%</td><td>May 2010</td><td>May 2010</td></tr><tr><td>FMBs</td><td>137</td><td>5.65%</td><td>October 2010</td><td>April 2035</td></tr><tr><td>Tax-exempt pollution control revenue bonds</td><td>58</td><td>Various</td><td>June 2010</td><td>June 2010</td></tr></table>

(a) In conjunction with the issuance of the 5.05 percent senior notes due 2018, CMS Energy called for redemption on December 20, 2010 all of its outstanding 3.375 percent contingently convertible senior notes due 2023. In December 2010, holders tendered for conversion $132 million of the 3.375 percent contingently convertible senior notes due 2023. In December 2011, CMS Energy used a portion of the net proceeds from the issuance of the 5.05 percent senior notes to pay $128 million principal amount of the conversion value and issued 6,715,073 shares of its common stock to pay the common stock portion of the conversion value. In January 2011, CMS Energy paid $4 million principal amount of the conversion value and issued 197,472 shares of its common stock to pay the common stock portion of the conversion value, which completed the redemption of the 3.375 percent contingently convertible senior notes due 2023.

(b) CMS Energy retired this debt at a premium, and recorded a loss on extinguishment of debt of $6 million in Other expense on its Consolidated Statements of Income.

(c) CMS Energy retired this debt at a premium, and recorded a loss on extinguishment of debt of $2 million in Other expense on its Consolidated Statements of Income.

FMBs: Consumers secure its FMBs by a mortgage and lien on substantially all of its property. Consumers' ability to issue FMBs is restricted by certain provisions in the First Mortgage Bond Indenture and the need for



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

regulatory approvals under federal law. Restrictive issuance provisions in the First Mortgage Bond Indenture include achieving a two-times interest coverage ratio and having sufficient unfunded net property additions.

Regulatory Authorization for Financings: FERC has authorized Consumers to have outstanding at any one time, up to $1.0 billion of secured and unsecured short-term securities for general corporate purposes. The remaining availability is $670 million at December 31, 2010. FERC has also authorized Consumers to issue and sell up to $1.1 billion of secured and unsecured long-term securities for general corporate purposes. The remaining availability is $650 million at December 31, 2010. The authorizations are for the period ending June 30, 2012. Any long-term issuances during the authorization period are exempt from FERC’s competitive bidding and negotiated placement requirements.

Securitization Bonds: Certain regulatory assets owned by Consumers’ subsidiary, Consumers Funding, collateralize Consumers’ Securitization bonds. The bondholders have no recourse to Consumers’ other assets. Through its rate structure, Consumers bills customers for Securitization surcharges to fund the payment of principal, interest, and other related expenses. The surcharges collected are remitted to a trustee and are not available to creditors of Consumers or creditors of Consumers’ affiliates other than Consumers Funding. Securitization surcharges totaled $49 million in 2010 and $46 million in 2009.

Long-Term Debt — Related Parties: CMS Energy formed a statutory wholly owned business trust for the sole purpose of issuing preferred securities and lending the gross proceeds to itself. The sole assets of the trust consist of 7.75 percent convertible subordinated debentures maturing in 2027. These debentures have terms similar to those of the mandatorily redeemable preferred securities the trust issued. Under prior accounting rules, CMS Energy did not hold the controlling financial interest in the trust. Accordingly, at December 31, 2009, CMS Energy’s obligation to the trust was reflected in Long-term debt — related parties in the amount of $34 million. Interest expense was $8 million in 2009 and $14 million in 2008.

Effective January 1, 2010, CMS Energy consolidated CMS Energy Trust I, the issuer of the Trust Preferred Securities. Accordingly, at December 31, 2010, the trust’s obligations were included on CMS Energy’s Consolidated Balance Sheets as Long-term debt in the amount of $29 million.

Debt Maturities: At December 31, 2010, the aggregate annual contractual maturities for long-term debt for the next five years were:

<table><tr><td rowspan="3"></td><td colspan="6">Payments Due</td></tr><tr><td rowspan="2">2011</td><td rowspan="2">2012</td><td rowspan="2">2013</td><td rowspan="2">2014</td><td rowspan="2">2015</td><td rowspan="2"></td></tr><tr></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Long-term debt</td><td>$439</td><td>$429</td><td>$590</td><td>$262</td><td>$714</td><td></td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Long-term debt</td><td>$ 37</td><td>$339</td><td>$416</td><td>$243</td><td>$324</td><td></td></tr></table>



## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Revolving Credit Facilities: The following secured revolving credit facilities with banks were available at December 31, 2010:

<table><tr><td>Company</td><td>Expiration Date</td><td>Amount of Facility</td><td>Amount Borrowed</td><td>Letters of Credit Outstanding</td><td>Amount Available</td></tr><tr><td></td><td></td><td></td><td colspan="3">In Millions</td></tr><tr><td>CMS Energy(a)</td><td>April 2, 2012</td><td>$550</td><td>$—</td><td>$ 3</td><td>$547</td></tr><tr><td>Consumers(b)</td><td>September 21, 2011</td><td>30</td><td>—</td><td>30</td><td>—</td></tr><tr><td>Consumers</td><td>March 30, 2012</td><td>500</td><td>—</td><td>300</td><td>200</td></tr><tr><td>Consumers</td><td>August 9, 2013</td><td>150</td><td>—</td><td>—</td><td>150</td></tr></table>

(a) CMS Energy’s average borrowings during the year ended December 31, 2010, totaled $1 million, with a weighted-average annual interest rate of 1.0 percent, at LIBOR plus 0.75 percent.

(b) Secured revolving letter of credit facility.

Short-term Borrowings: Under Consumers’ revolving accounts receivable sales program, Consumers may transfer up to $250 million of accounts receivable, subject to certain eligibility requirements, to a wholly owned, consolidated, bankruptcy-remote special-purpose entity. In turn, the special purpose entity may transfer an undivided interest in the receivables. Under accounting rules effective January 1, 2010, transactions entered into under this program are accounted for as secured borrowings rather than as sales. At December 31, 2010, $250 million of accounts receivable were eligible for transfer, and no accounts receivable had been transferred under the program. Prior to 2010, Consumers accounted for these transfers as sales. At December 31, 2009, $250 million of accounts receivable were eligible for sale, of which $50 million were sold.

During the year ended December 31, 2010, Consumers’ maximum short-term borrowings totaled $50 million, and its average short-term borrowings totaled $1 million, with a weighted-average annual interest rate of 0.2 percent.

Contingently Convertible Securities: Presented in the following table are the significant terms of CMS Energy’s contingently convertible securities at December 31, 2010:

<table><tr><td>Security</td><td>Maturity</td><td>Outstanding (In Millions)</td><td>Adjusted Conversion Price</td><td>Adjusted Trigger Price</td></tr><tr><td>2.875% senior notes</td><td>2024</td><td>$288</td><td>$13.09</td><td>$15.70</td></tr><tr><td>3.375% senior notes</td><td>2023</td><td>4</td><td>9.47</td><td>11.36</td></tr><tr><td>5.50% senior notes</td><td>2029</td><td>172</td><td>14.46</td><td>18.80</td></tr></table>

The holders of the 2.875 percent senior notes have the right to require CMS Energy to purchase the notes at par on December 1, 2011, 2014, and 2019.

The securities become convertible for a calendar quarter if the price of CMS Energy’s common stock remains at or above the trigger price for 20 of 30 consecutive trading days ending on the last trading day of the previous quarter. The trigger price at which these securities become convertible is 120 percent of the conversion price for the 2.875 percent senior notes and 130 percent for the 5.5 percent senior notes. The conversion and trigger prices are subject to adjustment in certain circumstances, including payments or distributions to CMS Energy’s common stockholders. The conversion and trigger price adjustment is made when the cumulative change in conversion and trigger prices is one percent or more. During December 2010, trigger price contingencies were met for the 2.875 percent senior notes.

All of CMS Energy’s contingently convertible securities, if converted, require CMS Energy to pay cash up to the principal amount of the securities. Any conversion value in excess of that amount is paid in shares of CMS Energy’s common stock.



## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following tables are details about conversions of contingently convertible securities during 2010:

<table><tr><td>4.5 percent cumulative convertible preferred stock(a)</td><td>Conversion Date</td><td>Shares Converted</td><td>Conversion Value per Share</td><td>Common Stock Issued on Settlement</td><td>Cash Paid on Settlement (In Millions)</td></tr><tr><td>Voluntary conversion</td><td>June 2010</td><td>100</td><td>$ 84.75</td><td>228</td><td>$ —</td></tr><tr><td>Voluntary conversion</td><td>July 2010</td><td>250,000</td><td>$ 89.43</td><td>614,940</td><td>13</td></tr><tr><td>Voluntary conversion</td><td>October 2010</td><td>1,000</td><td>$102.32</td><td>2,852</td><td>—</td></tr><tr><td>Voluntary conversion</td><td>October 2010</td><td>632,971</td><td>$103.88</td><td>1,831,604</td><td>32</td></tr><tr><td>Mandatory conversion</td><td>October 2010</td><td>3,884,929</td><td>$104.22</td><td>11,276,277</td><td>194</td></tr><tr><td></td><td></td><td>4,769,000</td><td></td><td>13,725,901</td><td>$239</td></tr><tr><td>3.375 percent contingently convertible senior notes due 2023(b)</td><td>Conversion Date</td><td>Principal Converted (In Millions)</td><td>Conversion Value per $1,000 of principal</td><td>Common Stock Issued on Settlement</td><td>Cash Paid on Settlement (In Millions)</td></tr><tr><td>Voluntary conversion</td><td>August 2010</td><td>$ 8</td><td>$1,666.57</td><td>331,008</td><td>$ 8</td></tr><tr><td>Voluntary conversion</td><td>December 2010</td><td>75</td><td>$1,982.59</td><td>3,941,770</td><td>75</td></tr><tr><td>Voluntary conversion</td><td>December 2010</td><td>21</td><td>$1,987.87</td><td>1,102,299</td><td>21</td></tr><tr><td>Voluntary conversion</td><td>December 2010</td><td>29</td><td>$1,996.32</td><td>1,504,074</td><td>29</td></tr><tr><td>Voluntary conversion</td><td>December 2010</td><td>3</td><td>$2,006.88</td><td>166,930</td><td>3</td></tr><tr><td></td><td></td><td>$136</td><td></td><td>7,046,081</td><td>$136</td></tr></table>

(a) In September 2010, CMS Energy exercised its mandatory conversion rights for all of its outstanding 4.50 percent cumulative convertible preferred stock. Also in September 2010, holders voluntarily tendered 633,971 shares of the 4.50 percent cumulative convertible preferred stock for conversion. In October 2010, CMS Energy paid $226 million in cash and issued 13,110,733 shares of its common stock upon conversion of 4,518,900 shares of its 4.50 percent cumulative convertible preferred stock.

(b) In December 2010, CMS Energy called all of its outstanding 3.375 percent contingently convertible senior notes for redemption. In response to the call, holders voluntarily tendered $128 million aggregate principal amount of the notes for conversion in December 2010. In December 2010, holders also voluntarily tendered $4 million aggregate principal amount of the notes for conversion in January 2011. The conversion value per $1,000 principal amount of convertible notes was $1,994.21. In January 2011, CMS Energy paid $4 million in cash and issued 197,472 shares of its common stock in exchange for the $4 million aggregate principal amount of notes tendered.

Dividend Restrictions: Under provisions of CMS Energy’s senior notes indenture, at December 31, 2010, payment of common stock dividends by CMS Energy was limited to $959 million.

Under the provisions of its articles of incorporation, at December 31, 2010, Consumers had $404 million of unrestricted retained earnings available to pay common stock dividends to CMS Energy. Provisions of the Federal Power Act and the Natural Gas Act appear to restrict dividends payable by Consumers to the amount of Consumers' retained earnings. Several decisions from FERC suggest that under a variety of circumstances common stock dividends from Consumers would not be limited to amounts in Consumers' retained earnings. Any decision by Consumers to pay common stock dividends in excess of retained earnings would be based on specific facts and circumstances and would result only after a formal regulatory filing process.

During 2010, CMS Energy received $358 million of common stock dividends from Consumers.



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Capitalization: The authorized capital stock of CMS Energy consists of:

• 350 million shares of CMS Energy Common Stock, par value $0.01 per share, and

• 10 million shares of CMS Energy Preferred Stock, par value $0.01 per share.

Preferred Stock of Subsidiary: Presented in the following table are details about Consumers’ preferred stock outstanding:

<table><tr><td>December 31, 2010 and 2009</td><td>Series</td><td>Optional Redemption Price</td><td>Number of Shares</td><td>In Millions</td></tr><tr><td>Cumulative $100 par value, authorized 7,500,000 shares, with no mandatory redemption</td><td>$4.16</td><td>$103.25</td><td>68,451</td><td>$ 7</td></tr><tr><td></td><td>$4.50</td><td>$110.00</td><td>373,148</td><td>37</td></tr><tr><td>Total preferred stock of Consumers</td><td></td><td></td><td></td><td>$44</td></tr></table>

## 8: EARNINGS PER SHARE — CMS ENERGY

Presented in the following table are CMS Energy’s basic and diluted EPS computations based on Income from Continuing Operations:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td></td><td colspan="3">In Millions, Except Per Share Amounts</td></tr><tr><td>Income Available to Common Stockholders</td><td></td><td></td><td></td></tr><tr><td>Income from Continuing Operations</td><td>$ 366</td><td>$ 220</td><td>$ 301</td></tr><tr><td>Less Income Attributable to Noncontrolling Interests</td><td>(3)</td><td>(11)</td><td>(7)</td></tr><tr><td>Less Charge for Deferred Issuance Costs on Preferred Stock</td><td>(8)</td><td>—</td><td>—</td></tr><tr><td>Less Preferred Stock Dividends</td><td>(8)</td><td>(11)</td><td>(11)</td></tr><tr><td>Income from Continuing Operations Available to Common Stockholders — Basic and Diluted</td><td>$ 347</td><td>$ 198</td><td>$ 283</td></tr><tr><td>Average Common Shares Outstanding</td><td></td><td></td><td></td></tr><tr><td>Weighted average shares — basic</td><td>231.5</td><td>227.2</td><td>225.7</td></tr><tr><td>Add dilutive contingently convertible securities</td><td>21.3</td><td>10.6</td><td>10.3</td></tr><tr><td>Add dilutive non-vested stock awards, options, and warrants</td><td>0.1</td><td>0.1</td><td>0.2</td></tr><tr><td>Weighted average shares — diluted</td><td>252.9</td><td>237.9</td><td>236.2</td></tr><tr><td>Income from Continuing Operations per Average Common Share Available to Common Stockholders</td><td></td><td></td><td></td></tr><tr><td>Basic</td><td>$ 1.50</td><td>$ 0.87</td><td>$ 1.25</td></tr><tr><td>Diluted</td><td>$ 1.36</td><td>$ 0.83</td><td>$ 1.20</td></tr></table>

Contingently Convertible Securities: When CMS Energy has earnings from continuing operations, its contingently convertible securities dilute EPS to the extent that the conversion value of a security, which is based on the average market price of CMS Energy’s common stock, exceeds the principal value of that security.

In September 2010, CMS Energy exercised its mandatory conversion rights for all of its outstanding 4.50 percent cumulative convertible preferred stock and charged unamortized issuance costs of $8 million to Charge for Deferred Issuance Costs on Preferred Stock, in Accumulated Deficit, which reduced Net Income Available to Common Stockholders on its Consolidated Statements of Income. In October 2010, CMS Energy



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

issued 11,276,277 shares of its common stock upon conversion. For additional details on contingently convertible securities, see Note 7, Financials and Capitalization.

Stock Options and Warrants: For the year ended December 31, 2010, outstanding options to purchase 0.4 million shares of CMS Energy common stock had no impact on diluted EPS, since the exercise price was greater than the average market price of CMS Energy common stock. These stock options have the potential to dilute EPS in the future.

Non-vested Stock Awards: CMS Energy’s non-vested stock awards are composed of participating and non-participating securities. The participating securities accrue cash dividends when common stockholders receive dividends. Since the recipient is not required to return the dividends to CMS Energy if the recipient forfeits the award, the non-vested stock awards are considered participating securities. As such, the participating non-vested stock awards were included in the computation of basic EPS. The non-participating securities accrue stock dividends that vest concurrently with the stock award. If the recipient forfeits the award, the stock dividends accrued on the non-participating securities are also forfeited. Accordingly, the non-participating awards and stock dividends were included in the computation of diluted EPS, but not basic EPS.

Convertible Debentures: For the years ended December 31, 2010, 2009, and 2008, there was no impact on diluted EPS from CMS Energy’s 7.75 percent convertible subordinated debentures. Using the if-converted method, the debentures would have:

• increased the numerator of diluted EPS by $1 million for the year ended December 31, 2010, by $5 million for the year ended December 31, 2009, and by $9 million for the year ended December 31, 2008, from an assumed reduction of interest expense, net of tax; and

• increased the denominator of diluted EPS by 0.7 million shares for the year ended December 31, 2010, by 2.3 million shares for the year ended December 31, 2009, and by 4.2 million shares for the year ended December 31, 2008.

CMS Energy can revoke the conversion rights if certain conditions are met.

## 9: FINANCIAL INSTRUMENTS

The carrying amounts of CMS Energy’s and Consumers’ cash, cash equivalents, current accounts and notes receivable, short-term investments, and current liabilities approximate their fair values because of their short-term nature. Presented in the following table are the cost or carrying amounts and fair values of CMS Energy’s and Consumers’ long-term financial instruments:

<table><tr><td rowspan="3">December 31</td><td colspan="3">2010</td><td colspan="3">2009</td></tr><tr><td rowspan="2">Cost or Carrying Amount</td><td rowspan="2">Fair Value</td><td colspan="2">Cost or Carrying Amount</td><td rowspan="2">Fair Value</td><td></td></tr><tr><td colspan="2">In Millions</td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Securities held to maturity</td><td>$ 5</td><td>$ 6</td><td>$ 4</td><td>$ 4</td><td></td><td></td></tr><tr><td>Securities available for sale</td><td>90</td><td>90</td><td>26</td><td>27</td><td></td><td></td></tr><tr><td>Notes receivable(a)</td><td>386</td><td>407</td><td>269</td><td>279</td><td></td><td></td></tr><tr><td>Long-term debt(b)</td><td>7,174</td><td>7,861</td><td>6,567</td><td>7,013</td><td></td><td></td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Securities available for sale</td><td>$ 64</td><td>$ 90</td><td>$ 24</td><td>$ 45</td><td></td><td></td></tr><tr><td>Long-term debt(c)</td><td>4,525</td><td>4,891</td><td>4,406</td><td>4,635</td><td></td><td></td></tr></table>



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(a) Includes current portion of notes receivable of $11 million at December 31, 2010 and less than $1 million at December 31, 2009.

(b) Includes current portion of long-term debt of $726 million at December 31, 2010 and $672 million at December 31, 2009.

(c) Includes current portion of long-term debt of $37 million at December 31, 2010 and $343 million at December 31, 2009.

Notes receivable consist of EnerBank’s fixed-rate installment loans. EnerBank estimates the fair value of these loans using a discounted cash flows technique that incorporates market interest rates as well as assumptions about the remaining life of the loans and credit risk. Fair values for impaired loans are estimated using discounted cash flows or underlying collateral values.

CMS Energy and Consumers estimate the fair value of their long-term debt using quoted prices from market trades of the debt, if available. In the absence of quoted prices, CMS Energy and Consumers calculate market yields and prices for the debt using a matrix method that incorporates market data for similarly rated debt. Depending on the information available, other valuation techniques may be used that rely on internal assumptions and models. CMS Energy includes the value of the conversion features in estimating the fair value of its convertible debt, and incorporates, as appropriate, information on the market prices of CMS Energy’s common stock.

The effects of third-party credit enhancements are excluded from the fair value measurements of long-term debt. At December 31, 2010, CMS Energy’s long-term debt included $103 million principal amount that was supported by third-party credit enhancements. This entire principal amount was at Consumers. At December 31, 2009, CMS Energy’s long-term debt included $286 million principal amount that was supported by third-party insurance or other credit enhancements. Of this amount, $271 million principal amount was at Consumers.

Presented in the following table are CMS Energy’s and Consumers’ investment securities:

<table><tr><td rowspan="2">December 31</td><td colspan="3">2010</td><td colspan="3">2009</td></tr><tr><td>Cost</td><td>Unrealized Gains</td><td>Unrealized Losses</td><td>Fair Value</td><td>Cost</td><td>Unrealized Gains</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td>In Millions</td><td></td><td></td></tr><tr><td>Available for sale:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>SERP:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Mutual fund</td><td>$62</td><td>$—</td><td>$—</td><td>$62</td><td>$—</td><td>$—</td></tr><tr><td>State and municipal bonds</td><td>28</td><td>—</td><td>—</td><td>28</td><td>26</td><td>1</td></tr><tr><td>Held to maturity:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Debt securities</td><td>5</td><td>1</td><td>—</td><td>6</td><td>4</td><td>—</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available for sale:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>SERP:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Mutual fund</td><td>$39</td><td>$—</td><td>$—</td><td>$39</td><td>$—</td><td>$—</td></tr><tr><td>State and municipal bonds</td><td>17</td><td>—</td><td>—</td><td>17</td><td>16</td><td>—</td></tr><tr><td>CMS Energy common stock</td><td>8</td><td>26</td><td>—</td><td>34</td><td>8</td><td>21</td></tr></table>



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

The mutual fund classified as available for sale is a short-term, fixed-income fund. Shares in this fund were acquired during the year ended December 31, 2010. State and municipal bonds classified as available for sale consist of investment grade state and municipal bonds. Debt securities classified as held to maturity consist primarily of mortgage-backed securities held by EnerBank, as well as state and municipal bonds held by EnerBank.

Presented in the following table is the sales activity for CMS Energy’s and Consumers’ investment securities:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td></td><td></td><td>In Millions</td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS:</td><td></td><td></td><td></td></tr><tr><td>Proceeds from sales of investment securities</td><td>$ 1</td><td>$53</td><td>$ 2</td></tr><tr><td>Realized gains</td><td>—</td><td>8</td><td>—</td></tr><tr><td>Net gains from AOCI recognized in net income</td><td>—</td><td>5</td><td>—</td></tr><tr><td>CONSUMERS:</td><td></td><td></td><td></td></tr><tr><td>Proceeds from sales of investment securities</td><td>$—</td><td>$32</td><td>$ 2</td></tr><tr><td>Realized gains</td><td>—</td><td>5</td><td>—</td></tr><tr><td>Net gains from AOCI recognized in net income</td><td>—</td><td>3</td><td>—</td></tr></table>

The amounts for all periods represent sales of SERP securities classified as available for sale. The activity during 2009 related primarily to the sale of a SERP investment in a mutual fund, while the remainder of the activity for all three years related to sales of state and municipal bonds held within the SERP.

During 2008, the fair value of CMS Energy’s SERP investment in a mutual fund declined from $63 million to $39 million. These amounts include the decline in fair value of Consumers’ SERP investment in the mutual fund from $41 million to $25 million. CMS Energy and Consumers determined that these declines in fair value were other than temporary. Accordingly, CMS Energy recognized net unrealized losses of $24 million ($15 million net of tax) in Other expense on its Consolidated Statements of Income. Consumers recognized net unrealized losses of $16 million ($10 million net of tax) in Other expense on its Consolidated Statements of Income. These losses had been recorded in AOCI, in accordance with applicable accounting standards, before they were determined to be other than temporary.

Presented in the following table are the fair values of the SERP state and municipal bonds by contractual maturity at December 31, 2010:

<table><tr><td></td><td>CMS Energy, including Consumers</td><td>Consumers</td></tr><tr><td></td><td colspan="2">In Millions</td></tr><tr><td>Due one year or less</td><td>$ 1</td><td>$—</td></tr><tr><td>Due after one year through five years</td><td>12</td><td>7</td></tr><tr><td>Due after five years through ten years</td><td>9</td><td>6</td></tr><tr><td>Due after ten years</td><td>6</td><td>4</td></tr><tr><td>Total</td><td>$28</td><td>$17</td></tr></table>

## 10: DERIVATIVE INSTRUMENTS

In order to limit exposure to certain market risks, primarily changes in commodity prices, interest rates, and foreign exchange rates, CMS Energy and Consumers may enter into various risk management contracts, such as forward contracts, futures, options, and swaps. In entering into these contracts, they follow established policies and procedures under the direction of an executive oversight committee consisting of senior management.



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

representatives and a risk committee consisting of business unit managers. Neither CMS Energy nor Consumers enters into any derivatives for trading purposes.

The contracts used to manage market risks may qualify as derivative instruments. If a contract is a derivative and does not qualify for the normal purchases and sales exception, the contract is recorded on the balance sheet at its fair value. Each reporting period, the resulting asset or liability is adjusted to reflect any change in the fair value of the contract. Since none of CMS Energy’s or Consumers’ derivatives have been designated as accounting hedges, all changes in fair value are reported in earnings.

For a discussion of how CMS Energy and Consumers determine the fair value of their derivatives, see Note 4, Fair Value Measurements.

Commodity Price Risk: In order to support ongoing operations, CMS Energy and Consumers enter into contracts for the future purchase and sale of various commodities, such as electricity, natural gas, and coal. These forward contracts are generally long-term in nature and result in physical delivery of the commodity at a contracted price. Most of these contracts are not subject to derivative accounting because:

• they do not have a notional amount (that is, a number of units specified in a derivative instrument, such as MWh of electricity or bcf of natural gas);

• they qualify for the normal purchases and sales exception; or

• there is not an active market for the commodity.

CMS Energy’s and Consumers’ coal purchase contracts are not derivatives because there is not an active market for the coal they purchase. If an active market for coal develops in the future, some of these contracts may qualify as derivatives. For Consumers, which is subject to regulatory accounting, the resulting fair value gains and losses would be offset by changes in regulatory assets and liabilities and would not affect net income. No other subsidiaries of CMS Energy enter into coal purchase contracts.

CMS ERM has not designated its contracts to purchase and sell electricity and natural gas as normal purchases and sales and, therefore, CMS Energy accounts for those contracts as derivatives. To manage commodity price risks associated with these forward purchase and sale contracts, CMS ERM uses various financial instruments, such as futures, options, and swaps. At December 31, 2010, CMS ERM held the following derivative contracts:

• a forward contract for the physical sale of 675 GWh of electricity through 2015 on behalf of one of CMS Energy’s non-utility generating plants;

• futures contracts through 2011 as an economic hedge of 20 percent of the generating plant’s natural gas requirements needed to serve a steam sales contract, for a total of 0.2 bcf of natural gas;

• a forward contract for the physical sale of 50 GWh of electricity in January 2011;

• forward contracts to purchase 2.1 bcf and sell 2.1 bcf of natural gas through October 2011 in CMS ERM’s role as a marketer of natural gas for third-party producers; and

• an option to sell 612 GWh of electricity, and as an economic hedge, contracts to purchase 0.8 bcf of natural gas through 2011.



## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following table are the fair values of CMS Energy’s and Consumers’ derivative instruments:

<table><tr><td rowspan="3"></td><td colspan="3">Derivative Assets</td><td colspan="3">Derivative Liabilities</td></tr><tr><td rowspan="2">Balance Sheet Location</td><td rowspan="2">Fair Value at December 31 2010</td><td rowspan="2">2009</td><td rowspan="2">Balance Sheet Location</td><td rowspan="2">Fair Value at December 31 2010</td><td rowspan="2">2009</td></tr><tr></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Derivatives not designated as hedging instruments:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Commodity contracts(a)</td><td>Other assets</td><td>$ 1</td><td>$ 1</td><td>Other liabilities(b)</td><td>$ 4</td><td>$ 9</td></tr><tr><td>Interest rate contracts(c)</td><td>Other assets</td><td>—</td><td>—</td><td>Other liabilities</td><td>—</td><td>1</td></tr><tr><td>Total CMS Energy</td><td></td><td>$ 1</td><td>$ 1</td><td></td><td>$ 4</td><td>$10</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Derivatives not designated as hedging instruments:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Commodity contracts</td><td>Other assets</td><td>$ 1</td><td>$—</td><td>Other liabilities</td><td>$—</td><td>$—</td></tr></table>

(a) Assets and liabilities are presented gross and exclude the impact of offsetting derivative assets and liabilities under master netting agreements, which was less than $1 million at December 31, 2010 and was $1 million at December 31, 2009.

(b) Liabilities exclude the impact of offsetting cash margin deposits paid by CMS ERM to other parties, which was less than $1 million at December 31, 2010 and was $1 million at December 31, 2009. CMS Energy presents these liabilities net of these impacts on its Consolidated Balance Sheets.

(c) At December 31, 2009, CMS Energy’s derivatives included an interest rate collar held by Grayling as an economic hedge of the variable interest rate charged on its outstanding revenue bonds. Effective January 1, 2010, CMS Energy deconsolidated Grayling. CMS Energy reflected its share of the loss on the interest rate collar, which was less than $1 million at December 31, 2010, in Income (loss) from equity method investees on its Consolidated Statements of Income. For additional details about the deconsolidation of Grayling, see Note 18, Variable Interest Entities.



## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following table is the effect of CMS Energy’s and Consumers’ derivative instruments on their Consolidated Statements of Income:

<table><tr><td rowspan="2"></td><td rowspan="2">Location of Gain (Loss) on Derivatives Recognized in Income</td><td colspan="2">Amount of Gain (Loss) on Derivatives Recognized in Income</td></tr><tr><td>2010</td><td>2009</td></tr><tr><td>Twelve Months Ended December 31</td><td></td><td>In Millions</td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Derivatives not designated as hedging instruments:</td><td></td><td></td><td></td></tr><tr><td>Commodity contracts</td><td>Operating Revenue</td><td>$ 4</td><td>$ 7</td></tr><tr><td></td><td>Fuel for electric generation</td><td>4</td><td>(3)</td></tr><tr><td></td><td>Cost of gas sold</td><td>—</td><td>(2)</td></tr><tr><td></td><td>Purchased and interchange power</td><td>2</td><td>—</td></tr><tr><td></td><td>Other income</td><td>4</td><td>9</td></tr><tr><td>Interest rate contracts</td><td>Other expense</td><td>—</td><td>(1)</td></tr><tr><td>Foreign exchange contracts(a)</td><td>Other expense</td><td>—</td><td>(1)</td></tr><tr><td>Total CMS Energy</td><td></td><td>$14</td><td>$ 9</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Derivatives not designated as hedging instruments:</td><td></td><td></td><td></td></tr><tr><td>Commodity contracts</td><td>Other income</td><td>$ 4</td><td>$ 9</td></tr></table>

(a) This derivative loss relates to a foreign-exchange forward contract that CMS Energy settled in January 2009.

CMS Energy’s derivative liabilities subject to credit-risk-related contingent features were $1 million at December 31, 2010 and less than $1 million at December 31, 2009.

Credit Risk: CMS Energy’s swaps, options, and forward contracts contain credit risk, which is the risk that a counterparty will fail to meet its contractual obligations. CMS Energy reduces this risk through established policies and procedures. CMS Energy assesses credit quality by considering credit ratings, financial condition, and other available information for counterparties. A credit limit is established for each counterparty based on the evaluation of its credit quality. Exposure to potential loss under each contract is monitored and action is taken when appropriate.

CMS ERM enters into contracts primarily with companies in the electric and gas industry. This industry concentration may have a positive or negative impact on CMS Energy’s exposure to credit risk based on how similar changes in economic conditions, the weather, or other conditions affect these counterparties. CMS ERM reduces its credit risk exposure by using industry-standard agreements that allow for netting positive and negative exposures associated with the same counterparty. Typically, these agreements also allow each party to demand adequate assurance of future performance from the other party, when there is reason to do so.

At December 31, 2010, if counterparties within this industry concentration all failed to meet their contractual obligations, the loss to CMS Energy on contracts accounted for as derivatives would be less than $1 million.

CMS Energy does not expect a material adverse effect on its Consolidated Balance Sheets and Consolidated Statements of Income as a result of counterparty nonperformance, given CMS Energy’s credit policies, current exposures, and credit reserves.



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

## 11: RETIREMENT BENEFITS

CMS Energy and Consumers provide pension, OPEB, and other retirement benefits to employees under a number of different plans. These plans include:

• a non-contributory, qualified defined benefit Pension Plan (closed to new non-union participants as of July 1, 2003 and closed to new union participants as of September 1, 2005);

• a qualified cash balance Pension Plan for certain employees hired between July 1, 2003 and August 31, 2005;

• a non-contributory, qualified DCCP for employees hired on or after September 1, 2005;

• benefits to certain management employees under a non-contributory, nonqualified defined benefit SERP (closed to new participants as of March 31, 2006);

• a non-contributory, nonqualified DC SERP for certain management employees hired or promoted on or after April 1, 2006;

• health care and life insurance benefits under an OPEB plan;

• benefits to a selected group of management under a non-contributory, nonqualified EISP; and

• a contributory, qualified defined contribution 401(k) plan.

Pension Plan: Participants in the Pension Plan include CMS Energy’s and Consumers’ present employees, employees of their subsidiaries, and employees of Panhandle, a former CMS Energy subsidiary. Pension Plan trust assets are not distinguishable by company.

CMS Energy and Consumers provide an employer contribution of five percent of base pay to the DCCP 401(k) plan for employees hired on or after September 1, 2005. On January 1, 2011, the employer contribution was increased to six percent. Employees are not required to contribute in order to receive the plan’s employer contribution.

Participants in the cash balance Pension Plan, effective July 1, 2003 to September 1, 2005, also participate in the DCCP as of September 1, 2005. Additional pay credits under the cash balance Pension Plan were discontinued as of September 1, 2005. DCCP expense for CMS Energy and Consumers was $5 million for the year ended December 31, 2010, $4 million for the year ended December 31, 2009, and $3 million for the year ended December 31, 2008.

SERP: The SERP is a non-qualified plan as defined by the Internal Revenue Code. SERP benefits are paid from a trust established in 1988. SERP trust earnings are taxable. Presented in the following table are the funded status and fair value of trust assets for CMS Energy’s and Consumers’ SERP:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td></tr><tr><td></td><td colspan="2">In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td></tr><tr><td>Trust assets(a)</td><td>$ 91</td><td>$77</td></tr><tr><td>ABO</td><td>107</td><td>93</td></tr><tr><td>Contributions</td><td>17</td><td>2</td></tr><tr><td>CONSUMERS</td><td></td><td></td></tr><tr><td>Trust assets(a)</td><td>$ 57</td><td>$50</td></tr><tr><td>ABO</td><td>66</td><td>54</td></tr><tr><td>Contributions</td><td>11</td><td>1</td></tr></table>

(a) Trust assets are included in Other non-current assets on CMS Energy’s and Consumers’ Consolidated Balance Sheets.



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

On April 1, 2006, CMS Energy and Consumers implemented a DC SERP and froze further new participation in the SERP. The DC SERP provides participants benefits ranging from 5 percent to 15 percent of total compensation. The DC SERP requires a minimum of five years of participation before vesting. CMS Energy’s and Consumers’ contributions to the plan, if any, are placed in a grantor trust. For CMS Energy and Consumers, trust assets were less than $1 million at December 31, 2010 and December 31, 2009. DC SERP assets are included in Other non-current assets on CMS Energy’s and Consumers’ Consolidated Balance Sheets. CMS Energy’s and Consumers’ DC SERP expense was less than $1 million for each of the years ended December 31, 2010, 2009, and 2008.

401(k): The 401(k) plan employer match equals 60 percent of eligible contributions up to the first six percent of an employee’s wages. The total 401(k) plan cost for CMS Energy, including Consumers, was $16 million for each of the years ended December 31, 2010, 2009, and 2008. The total 401(k) plan cost for Consumers was $15 million for each of the years ended December 31, 2010, 2009, and 2008.

EISP: In 2002, CMS Energy and Consumers implemented a nonqualified EISP to provide flexibility in separation of employment by officers, a selected group of management, or other highly compensated employees. Terms of the plan include payment of a lump sum, payment of monthly benefits for life, payment of premiums for continuation of health care, or any other legally permissible term deemed to be in CMS Energy’s and Consumers’ best interest. EISP expense for CMS Energy and Consumers was less than $1 million for each of the years ended December 31, 2010, 2009, and 2008. The ABO for the EISP for CMS Energy, including Consumers, was $5 million at December 31, 2010 and $4 million at December 31, 2009. The ABO for the EISP for Consumers was $1 million at December 31, 2010 and 2009.

OPEB: Participants in the OPEB plan include all regular full-time employees covered by the employee health care plan on the day before retirement from either CMS Energy or Consumers at age 55 or older with at least ten full years of applicable continuous service. Regular full-time employees who qualify for Pension Plan disability retirement and have 15 years of applicable continuous service may also participate in the OPEB plan. Retiree health care costs were based on the assumption that costs would increase 8.0 percent in 2011 for all retirees. In 2010, the assumption was 8.5 percent for those under 65 and 8.0 percent for those over 65. The rate of increase was assumed to decline to five percent for all retirees by 2017 and thereafter.

The assumptions used in the health care cost-trend rate affect service, interest, and PBO costs. Presented in the following table are the effects of a one-percentage-point change in the health care cost-trend assumption:

<table><tr><td></td><td>One Percentage Point Increase</td><td>One Percentage Point Decrease</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td></tr><tr><td>Effect on total service and interest cost component.</td><td>$ 19</td><td>$ (16)</td></tr><tr><td>Effect on PBO</td><td>$201</td><td>$(175)</td></tr><tr><td>CONSUMERS</td><td></td><td></td></tr><tr><td>Effect on total service and interest cost component.</td><td>$ 18</td><td>$ (15)</td></tr><tr><td>Effect on PBO</td><td>$196</td><td>$(170)</td></tr></table>

In 1992, Consumers recorded a liability of $466 million for the accumulated transition obligation and a corresponding regulatory asset for anticipated recovery in utility rates. The MPSC authorized recovery of the electric utility portion of these costs in 1994 over 18 years and the gas utility portion in 1996 over 16 years.



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Assumptions: Presented in the following tables are the weighted-average assumptions used in CMS Energy’s and Consumers’ retirement benefits plans to determine benefit obligations and net periodic benefit cost:

## Weighted Average for Benefit Obligations:

<table><tr><td rowspan="2">Years Ended December 31</td><td colspan="3">Pension and SERP</td><td colspan="3">OPEB</td></tr><tr><td>2010</td><td>2009</td><td>2008</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Discount rate(a)</td><td>5.40%</td><td>5.85%</td><td>6.50%</td><td>5.60%</td><td>6.00%</td><td>6.50%</td></tr><tr><td>Expected long-term rate of return on plan assets(b)</td><td>8.00%</td><td>8.00%</td><td>8.25%</td><td>7.50%</td><td>7.50%</td><td>7.75%</td></tr><tr><td>Mortality table(c)</td><td>2000</td><td>2000</td><td>2000</td><td>2000</td><td>2000</td><td>200</td></tr><tr><td>Rate of compensation increase:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Pension</td><td>4.00%</td><td>4.00%</td><td>4.00%</td><td></td><td></td><td></td></tr><tr><td>SERP</td><td>5.50%</td><td>5.50%</td><td>5.50%</td><td></td><td></td><td></td></tr></table>

## Weighted Average for Net Periodic Benefit Cost:

<table><tr><td rowspan="2">Years Ended December 31</td><td colspan="3">Pension and SERP</td><td colspan="3">OPEB</td></tr><tr><td>2010</td><td>2009</td><td>2008</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Discount rate(a)</td><td>5.85%</td><td>6.50%</td><td>6.40%</td><td>6.00%</td><td>6.50%</td><td>6.50%</td></tr><tr><td>Expected long-term rate of return on plan assets(b)</td><td>8.00%</td><td>8.25%</td><td>8.25%</td><td>7.50%</td><td>7.75%</td><td>7.75%</td></tr><tr><td>Mortality table(c)</td><td>2000</td><td>2000</td><td>2000</td><td>2000</td><td>2000</td><td>200</td></tr><tr><td>Rate of compensation increase:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Pension</td><td>4.00%</td><td>4.00%</td><td>4.00%</td><td></td><td></td><td></td></tr><tr><td>SERP</td><td>5.50%</td><td>5.50%</td><td>5.50%</td><td></td><td></td><td></td></tr></table>

(a) The discount rate reflects the rate at which benefits could be effectively settled and is equal to the equivalent single rate resulting from a yield curve analysis. This analysis incorporated the projected benefit payments specific to CMS Energy’s and Consumers’ Pension Plan and OPEB plan and the yields on high quality corporate bonds rated Aa or better.

(b) CMS Energy and Consumers determined the long-term rate of return using historical market returns, the present and expected future economic environment, the capital market principles of risk and return, and the expert opinions of individuals and firms with financial market knowledge. CMS Energy and Consumers considered the asset allocation of the portfolio in forecasting the future expected total return of the portfolio. The goal was to determine a long-term rate of return that could be incorporated into the planning of future cash flow requirements in conjunction with the change in the liability. Annually, CMS Energy and Consumers review for reasonableness and appropriateness the forecasted returns for various classes of assets used to construct an expected return model. CMS Energy’s and Consumers’ expected long-term rate of return on Pension Plan assets was eight percent in 2010. In 2010, the actual return on Pension Plan assets was 13 percent, in 2009 the actual return was 21 percent, and in 2008 the actual return was a negative 23 percent.

(c) The mortality assumption was based on the RP-2000 mortality tables with projection of future mortality improvements using Scale AA, which aligned with the IRS prescriptions for cash funding valuations under the Pension Protection Act of 2006.



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Costs: Presented in the following tables are the costs and other changes in plan assets and benefit obligations incurred in CMS Energy’s and Consumers’ retirement benefits plans:

<table><tr><td rowspan="2">Years Ended December 31</td><td colspan="3">Pension and SERP</td></tr><tr><td>2010</td><td>2009</td><td>2008</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Net periodic pension cost</td><td></td><td></td><td></td></tr><tr><td>Service cost</td><td>$ 45</td><td>$ 41</td><td>$ 43</td></tr><tr><td>Interest expense</td><td>104</td><td>102</td><td>101</td></tr><tr><td>Expected return on plan assets</td><td>(92)</td><td>(86)</td><td>(81)</td></tr><tr><td>Amortization of:</td><td></td><td></td><td></td></tr><tr><td>Net loss</td><td>52</td><td>41</td><td>41</td></tr><tr><td>Prior service cost</td><td>5</td><td>6</td><td>6</td></tr><tr><td>Net periodic pension cost</td><td>$114</td><td>$104</td><td>$110</td></tr><tr><td>Regulatory adjustment(a)</td><td>30</td><td>—</td><td>4</td></tr><tr><td>Net periodic pension cost after regulatory adjustment</td><td>$144</td><td>$104</td><td>$114</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Net periodic pension cost</td><td></td><td></td><td></td></tr><tr><td>Service cost</td><td>$ 44</td><td>$ 40</td><td>$ 41</td></tr><tr><td>Interest expense</td><td>99</td><td>97</td><td>96</td></tr><tr><td>Expected return on plan assets</td><td>(89)</td><td>(83)</td><td>(78)</td></tr><tr><td>Amortization of:</td><td></td><td></td><td></td></tr><tr><td>Net loss</td><td>50</td><td>40</td><td>40</td></tr><tr><td>Prior service cost</td><td>5</td><td>5</td><td>6</td></tr><tr><td>Net periodic pension cost</td><td>$109</td><td>$ 99</td><td>$105</td></tr><tr><td>Regulatory adjustment(a)</td><td>30</td><td>—</td><td>4</td></tr><tr><td>Net periodic pension cost after regulatory adjustment</td><td>$139</td><td>$ 99</td><td>$109</td></tr></table>



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

<table><tr><td rowspan="2">Years Ended December 31</td><td colspan="3">OPEB</td></tr><tr><td>2010</td><td>2009</td><td>2008</td></tr><tr><td></td><td colspan="3">In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Net periodic OPEB cost</td><td></td><td></td><td></td></tr><tr><td>Service cost</td><td>$ 26</td><td>$ 24</td><td>$ 22</td></tr><tr><td>Interest expense</td><td>80</td><td>80</td><td>72</td></tr><tr><td>Expected return on plan assets</td><td>(60)</td><td>(50)</td><td>(66)</td></tr><tr><td>Amortization of:</td><td></td><td></td><td></td></tr><tr><td>Net loss</td><td>32</td><td>33</td><td>9</td></tr><tr><td>Prior service credit</td><td>(17)</td><td>(10)</td><td>(10)</td></tr><tr><td>Net periodic OPEB cost</td><td>$ 61</td><td>$ 77</td><td>$ 27</td></tr><tr><td>Regulatory adjustment(a)</td><td>5</td><td>—</td><td>3</td></tr><tr><td>Net periodic OPEB cost after regulatory adjustment</td><td>$ 66</td><td>$ 77</td><td>$ 30</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Net periodic OPEB cost</td><td></td><td></td><td></td></tr><tr><td>Service cost</td><td>$ 25</td><td>$ 24</td><td>$ 21</td></tr><tr><td>Interest expense</td><td>77</td><td>77</td><td>69</td></tr><tr><td>Expected return on plan assets</td><td>(56)</td><td>(46)</td><td>(61)</td></tr><tr><td>Amortization of:</td><td></td><td></td><td></td></tr><tr><td>Net loss</td><td>33</td><td>33</td><td>10</td></tr><tr><td>Prior service credit</td><td>(16)</td><td>(10)</td><td>(10)</td></tr><tr><td>Net periodic OPEB cost</td><td>$ 63</td><td>$ 78</td><td>$ 29</td></tr><tr><td>Regulatory adjustment(a)</td><td>5</td><td>—</td><td>3</td></tr><tr><td>Net periodic OPEB cost after regulatory adjustment</td><td>$ 68</td><td>$ 78</td><td>$ 32</td></tr></table>

(a) Regulatory adjustments are the differences between amounts included in rates and the periodic benefit cost calculated. These regulatory adjustments were offset by surcharge revenues, which resulted in no impact to net income for the years presented. The pension and OPEB regulatory liability was less than $1 million at December 31, 2010. The pension and OPEB regulatory asset was $34 million at December 31, 2009.

The estimated net loss and prior service cost for the defined benefit Pension Plans that will be amortized into net periodic benefit cost in 2011 for CMS Energy from the regulatory asset is $66 million and from AOCI is $2 million. The estimated net loss and prior service cost for the defined benefit Pension Plans that will be amortized into net periodic benefit cost in 2011 for Consumers from the regulatory asset is $66 million. The estimated net loss and prior service credit for OPEB plans that will be amortized into net periodic benefit cost in 2011 for CMS Energy from the regulatory asset is $21 million, with a decrease from AOCI of $1 million. The estimated net loss and prior service credit for OPEB plans that will be amortized into net periodic benefit cost in 2011 for Consumers from the regulatory asset is $21 million.

CMS Energy and Consumers amortize net gains and losses in excess of ten percent of the greater of the PBO or the MRV over the average remaining service period. The estimated time of amortization of gains and losses for CMS Energy and Consumers was 12 years for pension and 14 years for OPEB for each of the years ended December 31, 2010, 2009, and 2008. Prior service cost amortization is established in the year in which the prior service cost first



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

occurred, and is based on the same amortization period for all future years until the prior service costs are fully amortized. The estimated time of amortization of new prior service costs for CMS Energy and Consumers was 12 years for pension and ten years for OPEB for each of the years ended December 31, 2010, 2009, and 2008.

Reconciliations: Presented in the following tables are reconciliations of the funded status of CMS Energy’s and Consumers’ retirement benefits plans with their retirement benefits plans’ liabilities:

<table><tr><td rowspan="3">Years Ended December 31</td><td colspan="2">Pension Plan</td></tr><tr><td>2010</td><td>2009</td></tr><tr><td colspan="2">In Millions</td></tr><tr><td>Benefit obligation at beginning of period</td><td>$1,717</td><td>$1,524</td></tr><tr><td>Service cost</td><td>44</td><td>40</td></tr><tr><td>Interest cost</td><td>98</td><td>96</td></tr><tr><td>Actuarial loss</td><td>150</td><td>145</td></tr><tr><td>Benefits paid</td><td>(113)</td><td>(88)</td></tr><tr><td>Benefit obligation at end of period(a)</td><td>$1,896</td><td>$1,717</td></tr><tr><td>Plan assets at fair value at beginning of period</td><td>$1,007</td><td>$ 724</td></tr><tr><td>Actual return on plan assets</td><td>132</td><td>165</td></tr><tr><td>Company contribution</td><td>375</td><td>206</td></tr><tr><td>Actual benefits paid(b)</td><td>(113)</td><td>(88)</td></tr><tr><td>Plan assets at fair value at end of period</td><td>$1,401</td><td>$1,007</td></tr><tr><td>Funded status at December 31(c)(d)</td><td>$ (495)</td><td>$ (710)</td></tr></table>

<table><tr><td rowspan="3">Years Ended December 31</td><td colspan="2">SERP</td><td colspan="2">OPEB</td></tr><tr><td>2010</td><td>2009</td><td>2010</td><td>2009</td></tr><tr><td colspan="4">In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Benefit obligation at beginning of period</td><td>$ 106</td><td>$ 95</td><td>$1,423</td><td>$1,266</td></tr><tr><td>Service cost</td><td>1</td><td>1</td><td>26</td><td>24</td></tr><tr><td>Interest cost</td><td>6</td><td>6</td><td>80</td><td>80</td></tr><tr><td>Plan amendments(e)</td><td>—</td><td>—</td><td>(101)</td><td>—</td></tr><tr><td>Actuarial loss</td><td>11</td><td>9</td><td>36</td><td>106</td></tr><tr><td>Benefits paid</td><td>(6)</td><td>(5)</td><td>(54)</td><td>(53)</td></tr><tr><td>Benefit obligation at end of period(a)</td><td>$ 118</td><td>$ 106</td><td>$1,410</td><td>$1,423</td></tr><tr><td>Plan assets at fair value at beginning of period</td><td>$ —</td><td>$ —</td><td>$ 782</td><td>$ 662</td></tr><tr><td>Actual return on plan assets</td><td>—</td><td>—</td><td>88</td><td>117</td></tr><tr><td>Company contribution</td><td>6</td><td>5</td><td>71</td><td>56</td></tr><tr><td>Actual benefits paid(b)</td><td>(6)</td><td>(5)</td><td>(54)</td><td>(53)</td></tr><tr><td>Plan assets at fair value at end of period</td><td>$ —</td><td>$ —</td><td>$ 887</td><td>$ 782</td></tr><tr><td>Funded status at December 31(c)</td><td>$ (118)</td><td>$ (106)</td><td>$ (523)</td><td>$ (641)</td></tr></table>



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

<table><tr><td rowspan="2">Years Ended December 31</td><td colspan="2">SERP</td><td colspan="2">OPEB</td></tr><tr><td>2010</td><td>2009</td><td>2010</td><td>2009</td></tr><tr><td></td><td colspan="4">In Millions</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Benefit obligation at beginning of period</td><td>$ 67</td><td>$ 62</td><td>$1,373</td><td>$1,219</td></tr><tr><td>Service cost</td><td>1</td><td>1</td><td>25</td><td>24</td></tr><tr><td>Interest cost</td><td>4</td><td>4</td><td>77</td><td>77</td></tr><tr><td>Plan amendments(e)</td><td>—</td><td>—</td><td>(100)</td><td>—</td></tr><tr><td>Actuarial loss</td><td>8</td><td>6</td><td>34</td><td>104</td></tr><tr><td>Transfer</td><td>—</td><td>(4)</td><td>—</td><td>—</td></tr><tr><td>Benefits paid</td><td>(3)</td><td>(2)</td><td>(51)</td><td>(51)</td></tr><tr><td>Benefit obligation at end of period(a)</td><td>$ 77</td><td>$ 67</td><td>$1,358</td><td>$1,373</td></tr><tr><td>Plan assets at fair value at beginning of period</td><td>$ —</td><td>$ —</td><td>$ 725</td><td>$ 612</td></tr><tr><td>Actual return on plan assets</td><td>—</td><td>—</td><td>81</td><td>108</td></tr><tr><td>Company contribution</td><td>3</td><td>2</td><td>70</td><td>55</td></tr><tr><td>Actual benefits paid(b)</td><td>(3)</td><td>(2)</td><td>(51)</td><td>(50)</td></tr><tr><td>Plan assets at fair value at end of period</td><td>$ —</td><td>$ —</td><td>$ 825</td><td>$ 725</td></tr><tr><td>Funded status at December 31(c)</td><td>$ (77)</td><td>$ (67)</td><td>$ (533)</td><td>$ (648)</td></tr></table>

(a) The Medicare Prescription Drug, Improvement and Modernization Act of 2003 established a prescription drug benefit under Medicare (Medicare Part D) and a federal subsidy, which is tax-exempt, to sponsors of retiree health care benefit plans that provide a benefit that is actuarially equivalent to Medicare Part D. In 2010, the Health Care Acts repealed these tax-exempt deductions for years beginning after December 31, 2012. The Medicare Part D annualized reduction in net OPEB cost for CMS Energy was $28 million for 2010, $19 million for 2009, and $25 million for 2008. Consumers' Medicare Part D annualized reduction in net OPEB costs was $26 million for 2010, $18 million for 2009, and $24 million for 2008. The reduction for CMS Energy and Consumers includes $10 million for 2010, $6 million for 2009, and $7 million for 2008 in capitalized OPEB costs.

(b) CMS Energy received payments of $5 million in 2010, $4 million in 2009, and $6 million in 2008 for the Medicare Part D subsidies. Consumers received payments of $5 million in 2010, $4 million in 2009, and $5 million in 2008 for the Medicare Part D subsidies.

(c) At December 31, 2010, CMS Energy classified $7 million as current liabilities and $1.1 billion as non-current liabilities on its Consolidated Balance Sheets. At December 31, 2009, CMS Energy classified $6 million as current liabilities and $1.5 billion as non-current liabilities on its Consolidated Balance Sheets.

At December 31, 2010, Consumers classified $4 million as current liabilities and $1.1 billion as non-current liabilities on its Consolidated Balance Sheets. At December 31, 2009, Consumers classified $3 million as current liabilities and $1.4 billion as non-current liabilities on its Consolidated Balance Sheets.

(d) At December 31, 2010, $463 million of the total funded status of the Pension Plan was attributable to Consumers based on an allocation of expenses. At December 31, 2009, $675 million of the funded status of the Pension Plan was attributable to Consumers based on an allocation of expenses.

(e) Plan amendments reflect changes resulting from an agreement reached with the Union in April 2010 on a new five-year contract for Union members.



## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following table are the Pension Plan PBO, ABO, and fair value of plan assets:

<table><tr><td rowspan="2">Years Ended December 31</td><td>2010</td><td>2009</td></tr><tr><td colspan="2">In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td></tr><tr><td>Pension PBO</td><td>$1,896</td><td>$1,717</td></tr><tr><td>Pension ABO</td><td>1,517</td><td>1,393</td></tr><tr><td>Fair value of Pension Plan assets</td><td>1,401</td><td>1,007</td></tr></table>

Items Not Yet Recognized as a Component of Net Periodic Benefit Cost: Presented in the following table are the amounts recognized in regulatory assets and AOCI that have not been recognized as components of net periodic benefit cost. For additional details on regulatory assets, see Note 6, Regulatory Matters.

<table><tr><td rowspan="3">Years Ended December 31</td><td colspan="2">Pension and SERP</td><td colspan="2">OPEB</td></tr><tr><td>2010</td><td>2009</td><td>2010</td><td>2009</td></tr><tr><td colspan="4">In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory assets</td><td></td><td></td><td></td><td></td></tr><tr><td>Net loss</td><td>$ 914</td><td>$860</td><td>$ 579</td><td>$604</td></tr><tr><td>Prior service cost (credit)</td><td>23</td><td>27</td><td>(152)</td><td>(68)</td></tr><tr><td>AOCI</td><td></td><td></td><td></td><td></td></tr><tr><td>Net loss (gain)</td><td>72</td><td>58</td><td>(9)</td><td>(11)</td></tr><tr><td>Prior service cost (credit)</td><td>2</td><td>3</td><td>(4)</td><td>(3)</td></tr><tr><td>Total amounts recognized in regulatory assets and AOCI</td><td>$1,011</td><td>$948</td><td>$ 414</td><td>$522</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory assets</td><td></td><td></td><td></td><td></td></tr><tr><td>Net loss</td><td>$ 914</td><td>$860</td><td>$ 579</td><td>$604</td></tr><tr><td>Prior service cost (credit)</td><td>23</td><td>27</td><td>(152)</td><td>(68)</td></tr><tr><td>AOCI</td><td></td><td></td><td></td><td></td></tr><tr><td>Net loss</td><td>22</td><td>14</td><td>—</td><td>—</td></tr><tr><td>Prior service cost</td><td>1</td><td>1</td><td>—</td><td>—</td></tr><tr><td>Total amounts recognized in regulatory assets and AOCI</td><td>$ 960</td><td>$902</td><td>$ 427</td><td>$536</td></tr></table>



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Plan Assets: Presented in the following tables are the fair values of CMS Energy’s and Consumers’ Pension Plan and OPEB plan assets at December 31, 2010 and 2009, by asset category and by level within the fair value hierarchy. For additional details regarding the fair value hierarchy, see Note 4, Fair Value Measurements.

<table><tr><td rowspan="2">Year Ended December 31, 2010</td><td colspan="3">Pension Plan</td></tr><tr><td>Total</td><td>Level 1 In Millions</td><td>Level 2</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Asset Category:</td><td></td><td></td><td></td></tr><tr><td>Cash and short-term investments(a)</td><td>$ 248</td><td>$248</td><td>$ —</td></tr><tr><td>U.S. government and agencies securities(b)</td><td>57</td><td>—</td><td>57</td></tr><tr><td>Corporate debt(c)</td><td>161</td><td>—</td><td>161</td></tr><tr><td>State and municipal bonds(e)</td><td>8</td><td>—</td><td>8</td></tr><tr><td>Foreign corporate debt(f)</td><td>17</td><td>—</td><td>17</td></tr><tr><td>Mutual funds(h)</td><td>183</td><td>183</td><td>—</td></tr><tr><td>Pooled funds(i)</td><td>727</td><td>—</td><td>727</td></tr><tr><td>Total</td><td>$1,401</td><td>$431</td><td>$970</td></tr><tr><td>Year Ended December 31, 2009</td><td colspan="3">Pension Plan</td></tr><tr><td></td><td>Total</td><td>Level 1 In Millions</td><td>Level 2</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Asset Category:</td><td></td><td></td><td></td></tr><tr><td>Cash and short-term investments(a)</td><td>$ 65</td><td>$ 65</td><td>$ —</td></tr><tr><td>U.S. government and agencies securities(b)</td><td>40</td><td>—</td><td>40</td></tr><tr><td>Corporate debt(c)</td><td>145</td><td>—</td><td>145</td></tr><tr><td>State and municipal bonds(e)</td><td>4</td><td>—</td><td>4</td></tr><tr><td>Foreign corporate debt(f)</td><td>17</td><td>—</td><td>17</td></tr><tr><td>Mutual funds(h)</td><td>117</td><td>117</td><td>—</td></tr><tr><td>Pooled funds(i)</td><td>619</td><td>—</td><td>619</td></tr><tr><td>Total</td><td>$1,007</td><td>$182</td><td>$825</td></tr></table>



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

<table><tr><td rowspan="2">Year Ended December 31, 2010</td><td colspan="3">OPEB Plan</td></tr><tr><td>Total</td><td>Level 1 In Millions</td><td>Level 2</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Asset Category:</td><td></td><td></td><td></td></tr><tr><td>Cash and short-term investments(a)</td><td>$ 56</td><td>$ 56</td><td>$ —</td></tr><tr><td>U.S. government and agencies securities(b)</td><td>181</td><td>—</td><td>181</td></tr><tr><td>Corporate debt(d)</td><td>20</td><td>—</td><td>20</td></tr><tr><td>State and municipal bonds(e)</td><td>36</td><td>—</td><td>36</td></tr><tr><td>Foreign corporate debt(f)</td><td>2</td><td>—</td><td>2</td></tr><tr><td>Common stocks(g)</td><td>154</td><td>154</td><td>—</td></tr><tr><td>Mutual funds(h)</td><td>23</td><td>23</td><td>—</td></tr><tr><td>Pooled funds(j)</td><td>415</td><td>—</td><td>415</td></tr><tr><td>Total</td><td>$887</td><td>$233</td><td>$654</td></tr><tr><td>Year Ended December 31, 2009</td><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>

(a) Cash and short-term investments consist of money market funds with daily liquidity.

(b) U.S. government and agencies securities consist of U.S. Treasury notes and other debt securities backed by the U.S. government and related agencies. These securities were valued based on quoted market prices.

(c) At December 31, 2010, corporate debt investments in the Pension Plan included investment grade bonds (61 percent) and non-investment grade, high-yield bonds (39 percent) of U.S. issuers from diverse industries. At December 31, 2009, corporate debt investments in the Pension Plan included investment grade bonds (63 percent) and non-investment grade, high-yield bonds (37 percent) of U.S. issuers from diverse industries. These securities are valued based on quoted market prices, when available, or yields presently available on comparable securities of issuers with similar credit ratings.

(d) At December 31, 2010, corporate debt investments in the OPEB plan included investment grade bonds (61 percent) and non-investment grade, high-yield bonds (39 percent) of U.S. issuers from diverse industries. At December 31, 2009, corporate debt investments in the OPEB plan included investment grade bonds (62 percent) and non-investment grade, high-yield bonds (38 percent) of U.S. issuers from diverse industries.



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

These securities are valued based on quoted market prices, when available, or yields presently available on comparable securities of issuers with similar credit ratings.

(e) State and municipal bonds were valued using a matrix-pricing model that incorporates Level 2 market-based information. The fair value of the bonds was derived from various observable inputs, including benchmark yields, reported securities trades, broker/dealer quotes, bond ratings, and general information on market movements for investment grade state and municipal securities normally considered by market participants when pricing such debt securities.

(f) Foreign corporate debt securities were valued based on quoted market prices, when available, or on yields available on comparable securities of issuers with similar credit ratings.

(g) Common stocks in the OPEB plan consist of equity securities with low transaction costs that were actively managed and tracked by the S&P 500 Index. These securities were valued at their quoted closing prices.

(h) Mutual funds represent shares in registered investment companies that are priced based on the quoted NAV that is the basis for transactions to buy or sell shares in the funds.

(i) Pooled funds in the Pension Plan include both common and collective trust funds as well as special funds that contain only employee benefit plan assets from two or more unrelated benefit plans. At December 31, 2010, these funds included investments in U.S. equity securities (55 percent), foreign equity securities (24 percent), foreign fixed-income securities (14 percent), U.S. fixed-income securities (four percent), and alternative investments (three percent). At December 31, 2009, these funds included investments in U.S. equity securities (56 percent), foreign equity securities (22 percent), foreign fixed-income securities (16 percent), U.S. fixed-income securities (three percent), and alternative investments (three percent). These investments were valued at the quoted NAV provided by the fund managers that is the basis for transactions to buy or sell shares in the funds.

(j) Pooled funds in the OPEB plan include both common and collective trust funds as well as special funds that contain only employee benefit plan assets from two or more unrelated benefit plans. At December 31, 2010, these funds included investments in U.S. equity securities (89 percent), foreign equity securities (six percent), foreign fixed-income securities (three percent), U.S. fixed-income securities (one percent), and alternative investments (one percent). At December 31, 2009, these funds included investments in U.S. equity securities (89 percent), foreign equity securities (five percent), foreign fixed-income securities (four percent), U.S. fixed-income securities (one percent), and alternative investments (one percent). These investments are valued at the quoted NAV provided by the fund managers that is the basis for transactions to buy or sell shares in the funds.

The fair value of Pension Plan and OPEB plan assets classified as Level 3 at December 31, 2010 and 2009 was less than $1 million.



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following table are the contributions to CMS Energy’s and Consumers’ OPEB plan and Pension Plan:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td></tr><tr><td></td><td colspan="2">In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td></tr><tr><td>OPEB: (a)</td><td></td><td></td></tr><tr><td>VEBA trust</td><td>$ 57</td><td>$ 40</td></tr><tr><td>401(h) component</td><td>14</td><td>16</td></tr><tr><td></td><td>$ 71</td><td>$ 56</td></tr><tr><td>Pension(b)</td><td>$375</td><td>$206</td></tr><tr><td>CONSUMERS</td><td></td><td></td></tr><tr><td>OPEB: (a)</td><td></td><td></td></tr><tr><td>VEBA trust</td><td>$ 57</td><td>$ 39</td></tr><tr><td>401(h) component</td><td>13</td><td>16</td></tr><tr><td></td><td>$ 70</td><td>$ 55</td></tr><tr><td>Pension(b)</td><td>$366</td><td>$199</td></tr></table>

(a) CMS Energy, including Consumers, plans to contribute $65 million to the OPEB plan in 2011 and Consumers plans to contribute $64 million to the OPEB plan in 2011.

(b) CMS Energy, including Consumers, does not plan to contribute to the Pension Plan in 2011.

Contributions include required and discretionary amounts. Actual future contributions will depend on future investment performance, changes in discount rates, and various factors related to the populations participating in the plans.

In 2008, CMS Energy adjusted its target asset allocation for Pension Plan assets to 50 percent equity, 30 percent fixed income, and 20 percent alternative-strategy investments. This adjustment is being made gradually by the allocation of contributions into alternative assets and the drawdown of equities to cover plan benefit payments and distributions. This revised target asset allocation is expected to continue to maximize the long-term return on plan assets, while maintaining a prudent level of risk. The level of acceptable risk is a function of the liabilities of the plan. Equity investments are diversified mostly across the S&P 500 Index, with lesser allocations to the S&P MidCap and SmallCap Indexes and Foreign Equity Funds. Fixed-income investments are diversified across investment grade instruments of government and corporate issuers as well as high-yield and global bond funds. Alternative strategies are diversified across absolute return investment approaches and global tactical asset allocation. CMS Energy and Consumers use annual liability measurements, quarterly portfolio reviews, and periodic asset/liability studies to evaluate the need for adjustments to the portfolio allocation.

CMS Energy and Consumers established union and non-union VEBA trusts to fund their future retiree health and life insurance benefits. These trusts are funded through the ratemaking process for Consumers and through direct contributions from the non-utility subsidiaries. CMS Energy and Consumers have a target asset allocation of 60 percent equity and 40 percent fixed-income investments.

CMS Energy and Consumers invest the equity portions of the union and non-union health care VEBA trusts in an S&P 500 Index fund. CMS Energy and Consumers invest the fixed-income portion of the union health care VEBA trust in domestic investment grade taxable instruments. CMS Energy and Consumers invest the fixed-income portion of the non-union health care VEBA trust in a diversified mix of domestic tax-exempt securities. The



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

investment selections of each VEBA trust are influenced by the tax consequences, as well as the objective of generating asset returns that will meet the medical and life insurance costs of retirees.

Benefit Payments: Presented in the following table are the expected benefit payments for each of the next five years and the five-year period thereafter:

<table><tr><td></td><td>Pension</td><td>SERP In Millions</td><td>OPEB(a)</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>2011</td><td>$ 86</td><td>$ 7</td><td>$ 62</td></tr><tr><td>2012</td><td>96</td><td>7</td><td>64</td></tr><tr><td>2013</td><td>106</td><td>6</td><td>67</td></tr><tr><td>2014</td><td>115</td><td>7</td><td>71</td></tr><tr><td>2015</td><td>126</td><td>8</td><td>74</td></tr><tr><td>2016-2020</td><td>764</td><td>42</td><td>428</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>2011</td><td>$ 83</td><td>$ 4</td><td>$ 59</td></tr><tr><td>2012</td><td>93</td><td>4</td><td>61</td></tr><tr><td>2013</td><td>103</td><td>3</td><td>64</td></tr><tr><td>2014</td><td>112</td><td>4</td><td>67</td></tr><tr><td>2015</td><td>122</td><td>4</td><td>71</td></tr><tr><td>2016-2020</td><td>741</td><td>22</td><td>407</td></tr></table>

(a) CMS Energy’s and Consumers’ OPEB benefit payments are net of employee contributions and expected Medicare Part D prescription drug subsidy payments. For CMS Energy, subsidies to be received are estimated to be $6 million for 2011, $7 million for 2012 and 2013, $8 million for 2014 and 2015, and $51 million combined for 2016 through 2020. For Consumers, subsidies to be received are estimated to be $6 million for 2011 and 2012, $7 million for 2013 and 2014, $8 million for 2015, and $49 million combined for 2016 through 2020.

Collective Bargaining Agreements: At December 31, 2010, the Union represented 42 percent of CMS Energy’s employees and 44 percent of Consumers’ employees. The Union represents Consumers’ operating, maintenance, construction, and call center employees. Union contracts expire in 2015. In October 2010, the United Steelworkers ratified a new agreement with Consumers for Zeeland employees, which became effective in January 2011.

## 12: INCOME TAXES

CMS Energy and its subsidiaries file a consolidated U.S. federal income tax return and a unitary Michigan income tax return. Income taxes are allocated based on each company’s separate taxable income in accordance with the CMS Energy tax sharing agreement.



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following table is the difference between actual income tax expense on continuing operations, excluding noncontrolling interests, and income tax expense computed by applying the statutory U.S. federal income tax rate:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td></td><td colspan="3">In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations before income taxes</td><td>$ 587</td><td>$ 324</td><td>$ 433</td></tr><tr><td>Income tax expense at statutory rate</td><td>205</td><td>114</td><td>152</td></tr><tr><td>Increase (decrease) in income taxes from:</td><td></td><td></td><td></td></tr><tr><td>State and local income taxes, net of federal benefit</td><td>26</td><td>21</td><td>3</td></tr><tr><td>Income tax credit amortization</td><td>(4)</td><td>(4)</td><td>(4)</td></tr><tr><td>Medicare Part D exempt income(a)</td><td>(6)</td><td>(6)</td><td>(9)</td></tr><tr><td>Property differences</td><td>2</td><td>1</td><td>3</td></tr><tr><td>Research and development credit, net</td><td>(3)</td><td>(9)</td><td>—</td></tr><tr><td>Valuation allowance</td><td>1</td><td>2</td><td>(6)</td></tr><tr><td>Other, net</td><td>3</td><td>(4)</td><td>—</td></tr><tr><td>Income tax expense</td><td>$ 224</td><td>$ 115</td><td>$ 139</td></tr><tr><td>Effective tax rate</td><td>38.2%</td><td>35.5%</td><td>32.1%</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations before income taxes</td><td>$ 688</td><td>$ 456</td><td>$ 562</td></tr><tr><td>Income tax expense at statutory rate</td><td>241</td><td>160</td><td>197</td></tr><tr><td>Increase (decrease) in income taxes from:</td><td></td><td></td><td></td></tr><tr><td>State and local income taxes, net of federal benefit</td><td>26</td><td>19</td><td>8</td></tr><tr><td>Income tax credit amortization</td><td>(4)</td><td>(4)</td><td>(4)</td></tr><tr><td>Medicare Part D exempt income(a)</td><td>(9)</td><td>(6)</td><td>(8)</td></tr><tr><td>Property differences</td><td>2</td><td>1</td><td>3</td></tr><tr><td>Research and development credit, net</td><td>(3)</td><td>(7)</td><td>—</td></tr><tr><td>Other, net</td><td>1</td><td>—</td><td>2</td></tr><tr><td>Income tax expense</td><td>$ 254</td><td>$ 163</td><td>$ 198</td></tr><tr><td>Effective tax rate</td><td>36.9%</td><td>35.7%</td><td>35.2%</td></tr></table>

(a) For taxable years beginning after December 31, 2012, the Health Care Acts prospectively repealed the tax deduction for the portion of health care costs that are reimbursed by the Medicare Part D subsidy. To reflect the law change, CMS Energy recognized deferred tax expense of $3 million during 2010. Consumers expect to recover this lost benefit through the ratemaking process and therefore continued to recognize the tax benefit during 2010. The total anticipated recovery was recorded as a regulatory asset of $74 million (not including the effects of ratemaking tax gross-ups) at December 31, 2010.



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following table are the significant components of income tax expense on continuing operations:

Years Ended December 31 2010 2009 2008
In Millions
CMS ENERGY, INCLUDING CONSUMERS
Current income taxes:
Federal ..... $ (21) $ (12) $ 4
State and local ..... 26 17 9
$ 5 $ 5 $ 13
Deferred income taxes:
Federal ..... $210 $ 86 $134
State and local ..... 13 28 (4)
$223 $114 $130
Deferred income tax credit, net ..... (4) (4) (4)
Tax expense ..... $224 $115 $139
CONSUMERS
Current income taxes:
Federal ..... $ (17) $ 72 $ (10)
State and local ..... 25 24 12
$ 8 $ 96 $ 2
Deferred income taxes:
Federal ..... $236 $ 66 $200
State and local ..... 14 5 —
$250 $ 71 $200
Deferred income tax credit, net ..... (4) (4) (4)
Tax expense ..... $254 $163 $198



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following table are the principal components of deferred income tax assets (liabilities) recognized:

<table><tr><td rowspan="2">December 31</td><td>2010</td><td>2009</td></tr><tr><td colspan="2">In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td></tr><tr><td>Employee benefits</td><td>$ (76)</td><td>$ 65</td></tr><tr><td>Gas inventory</td><td>(177)</td><td>(201)</td></tr><tr><td>Plant, property, and equipment</td><td>(1,382)</td><td>(1,145)</td></tr><tr><td>Regulatory tax liability</td><td>162</td><td>209</td></tr><tr><td>Reserves and accruals</td><td>101</td><td>83</td></tr><tr><td>Securitized costs</td><td>(120)</td><td>(141)</td></tr><tr><td>Tax loss and credit carryforwards</td><td>996</td><td>919</td></tr><tr><td>Other</td><td>(103)</td><td>(29)</td></tr><tr><td></td><td>$ (599)</td><td>$ (240)</td></tr><tr><td>Less: valuation allowance</td><td>(19)</td><td>(34)</td></tr><tr><td>Total net deferred income tax liabilities</td><td>$ (618)</td><td>$ (274)</td></tr><tr><td>Deferred tax assets, net of valuation reserves</td><td>$ 1,240</td><td>$ 1,242</td></tr><tr><td>Deferred tax liabilities</td><td>(1,858)</td><td>(1,516)</td></tr><tr><td>Total net deferred income tax liabilities</td><td>$ (618)</td><td>$ (274)</td></tr><tr><td>Consumers</td><td></td><td></td></tr><tr><td>Employee benefits</td><td>$ (110)</td><td>$ 28</td></tr><tr><td>Gas inventory</td><td>(177)</td><td>(201)</td></tr><tr><td>Plant, property, and equipment</td><td>(1,464)</td><td>(1,237)</td></tr><tr><td>Regulatory tax liability</td><td>162</td><td>209</td></tr><tr><td>Reserves and accruals</td><td>45</td><td>29</td></tr><tr><td>Securitized costs</td><td>(120)</td><td>(141)</td></tr><tr><td>Tax loss and credit carryforwards</td><td>281</td><td>232</td></tr><tr><td>Other</td><td>(115)</td><td>(51)</td></tr><tr><td>Total net deferred income tax liabilities</td><td>$ (1,498)</td><td>$ (1,132)</td></tr><tr><td>Deferred tax assets, net of valuation reserves</td><td>$ 488</td><td>$ 498</td></tr><tr><td>Deferred tax liabilities</td><td>(1,986)</td><td>(1,630)</td></tr><tr><td>Total net deferred income tax liabilities</td><td>$ (1,498)</td><td>$ (1,132)</td></tr></table>

Deferred tax assets and liabilities are recognized for the estimated future tax effect of temporary differences between the tax basis of assets or liabilities and the reported amounts in CMS Energy’s and Consumers’ Consolidated Financial Statements. Deferred tax assets and liabilities are classified as current or non-current according to the classification of the related assets or liabilities. Deferred tax assets and liabilities not related to assets or liabilities are classified according to the expected reversal date of the temporary differences.



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following table are the loss and credit carryforwards at December 31, 2010:

<table><tr><td rowspan="2"></td><td rowspan="2">Gross Amount</td><td>Tax Attribute</td><td rowspan="2">Expiration</td></tr><tr><td>In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Federal net operating loss carryforward</td><td>$1,466</td><td>$513</td><td>2023 - 2030</td></tr><tr><td>State and local net operating loss carryforwards(a)</td><td>450</td><td>5</td><td>2023 - 2030</td></tr><tr><td>Future state tax deductions(b)</td><td>—</td><td>170</td><td>No expiration</td></tr><tr><td>Alternative minimum tax credits</td><td>269</td><td>269</td><td>No expiration</td></tr><tr><td>General business credits(a)</td><td>39</td><td>39</td><td>2011 - 2030</td></tr><tr><td>Total tax attributes</td><td></td><td>$996</td><td></td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Federal net operating loss carryforward</td><td>$184</td><td>$ 64</td><td>2023 - 2030</td></tr><tr><td>State capital loss carryforward</td><td>10</td><td>1</td><td>2014</td></tr><tr><td>Future state tax deductions(b)</td><td>—</td><td>203</td><td>No expiration</td></tr><tr><td>General business credits</td><td>13</td><td>13</td><td>2011 - 2030</td></tr><tr><td>Total tax attributes</td><td></td><td>$281</td><td></td></tr></table>

(a) CMS Energy has provided a valuation allowance of $2 million for the local loss carryforward and a valuation allowance of $2 million for general business credits. CMS Energy and Consumers expect to utilize fully loss and credit carryforwards for which no valuation has been provided. It is reasonably possible that further adjustments will be made to the valuation allowances within one year.

(b) This State of Michigan tax deduction was granted as part of the enactment of the Michigan Business Tax. Under the Michigan Business Tax, the amount of future deduction is intended to offset the financial statement impact that would have been recognized upon enactment in 2007. Utilization of the deduction begins in 2015. Due to various limitations, the gross amount of this deduction is not meaningful.

Presented in the following table is a reconciliation of the beginning and ending amount of uncertain tax benefits:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td></td><td>In Millions</td><td></td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Balance at beginning of period</td><td>$ 62</td><td>$65</td><td>$51</td></tr><tr><td>Reductions for prior year tax positions</td><td>(58)</td><td>(6)</td><td>—</td></tr><tr><td>Additions for prior year tax positions</td><td>—</td><td>2</td><td>12</td></tr><tr><td>Additions for current year tax positions</td><td>—</td><td>1</td><td>2</td></tr><tr><td>Balance at end of period</td><td>$ 4</td><td>$62</td><td>$65</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Balance at beginning of period</td><td>$ 57</td><td>$55</td><td>$41</td></tr><tr><td>Reductions for prior year tax positions</td><td>(54)</td><td>(1)</td><td>—</td></tr><tr><td>Additions for prior year tax positions</td><td>—</td><td>2</td><td>12</td></tr><tr><td>Additions for current year tax positions</td><td>—</td><td>1</td><td>2</td></tr><tr><td>Balance at end of period</td><td>$ 3</td><td>$57</td><td>$55</td></tr></table>



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

CMS Energy, including Consumers, had uncertain tax benefits of $4 million at December 31, 2010, $8 million at December 31, 2009, and $10 million at December 31, 2008 that, if recognized, would affect the annual effective tax rate in future years. Consumers had uncertain tax benefits of $3 million at December 31, 2010 and 2009. There were no uncertain tax benefits that would reduce Consumers' effective tax rate at December 31, 2008.

CMS Energy and Consumers recognize accrued interest and penalties, where applicable, as part of income tax expense. CMS Energy, including Consumers, recognized no interest for the years ended December 31, 2010 and 2009, and $1 million for the year ended December 31, 2008. In 2010, CMS Energy settled with the IRS and, as a result, paid $6 million of accrued interest in December. At that time, a remaining accrued interest balance of $3 million was eliminated. Consumers recognized no interest for the years ended December 31, 2010 and 2009, and $1 million for the year ended December 31, 2008. Upon settlement with the IRS, Consumers paid $4 million to CMS Energy and eliminated a remaining accrued interest balance of $1 million.

In November 2010, the IRS concluded its most recent audit of CMS Energy and its subsidiaries, and proposed changes of $132 million to taxable income for the years ended December 31, 2002 through December 31, 2007. Of this amount, $82 million resulted in an adjustment to the existing net operating loss carryforward; the remaining $50 million increased taxable income. Most of the adjustments related to the timing of deductions, not the disallowance of deductions. CMS Energy accepted the proposed adjustments to taxable income, which resulted in the payment of $15 million of tax and accrued interest. The tax adjustments were allocated based on the companies' separate taxable income, in accordance with CMS Energy's tax sharing agreement. The impact to net income was less than $1 million.

In December 2010, the IRS began its audit of CMS Energy and its subsidiaries' 2008 and 2009 federal tax returns. The IRS also is auditing CMS Energy's research and development tax credit claims for 2001 through 2009. These credits are part of CMS Energy's overall general business credit carryforward. It is reasonably possible that, within the next twelve months, a settlement will be reached with the IRS on CMS Energy's research and development tax credit claim. The total claimed credit is $21 million.

The amount of income taxes paid is subject to ongoing audits by federal, state, and foreign tax authorities, which can result in proposed assessments. CMS Energy’s and Consumers’ estimate of the potential outcome for any uncertain tax issue is highly judgmental. CMS Energy and Consumers believe that their accrued tax liabilities at December 31, 2010 were adequate for all years.

## 13: STOCK-BASED COMPENSATION

CMS Energy and Consumers provide a PISP to key employees and non-employee directors based on their contributions to the successful management of the company. The PISP has a five-year term, expiring in May 2014.

All grants under the PISP for 2010, 2009, and 2008 were in the form of TSR restricted stock and time-lapse restricted stock. Restricted stock recipients receive shares of CMS Energy common stock. Restricted stock shares granted prior to August 1, 2010 have full dividend and voting rights. The TSR restricted stock shares granted in 2010 have full voting rights. In lieu of cash dividend payments, however, the TSR restricted stock shares granted in 2010 receive additional restricted shares equal to the value of the dividend. These additional restricted shares are subject to the same vesting conditions as the underlying restricted stock shares.

TSR restricted stock vesting is contingent on meeting a three-year service requirement and specific market conditions. For awards granted in 2008, half of the market condition is based on the achievement of specified levels of TSR over a three-year period and half is based on a comparison of CMS Energy's TSR with the median TSR of a peer group over the same three-year period. Depending on the outcome of the market condition, a recipient may earn a total award ranging from zero to 150 percent of the initial grant. For awards granted in 2010 and 2009, the market condition is based entirely on a comparison of CMS Energy's TSR with the median TSR of a peer group over the same three-year period. Depending on the outcome of the market condition, a recipient may earn a total award



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

ranging from zero to 200 percent of the initial grant. Time-lapse restricted stock vests after a service period of three years.

Restricted stock awards granted to officers in 2008 were 80 percent TSR restricted stock and 20 percent time-lapsed restricted stock. Awards granted to officers in 2010 and 2009 were 67 percent TSR restricted stock and 33 percent time-lapse restricted stock.

For awards granted prior to August 1, 2010, restricted shares may vest fully upon retirement, disability, or change of control of CMS Energy if certain minimum service requirements are met or are waived by action of the C&HR Committees. If employment terminates for any other reason (other than death) or the minimum service requirements are not met or waived, the restricted shares will be fully forfeited. For awards granted after August 1, 2010, a pro-rata portion of the award equal to the portion of the service period served between the award grant date and the employee’s termination date will vest upon termination of an employee due to retirement, disability, or change of control of CMS Energy. The remaining portion of the award will be forfeited. All awards vest fully upon death.

The PISP also allows for stock options, stock appreciation rights, phantom shares, performance units, and incentive options, none of which was granted in 2010, 2009, or 2008.

Shares awarded or subject to stock options, phantom shares, or performance units may not exceed 6 million shares from June 2009 through May 2014, nor may such awards to any recipient exceed 500,000 shares in any fiscal year. CMS Energy and Consumers may issue awards of up to 4,650,719 shares of common stock under the PISP at December 31, 2010. Shares for which payment or exercise is in cash, as well as shares or stock options forfeited for any reason other than failure to meet a market condition, may be awarded or granted again under the PISP.

Presented in the following table is restricted stock activity under the PISP:

<table><tr><td>Restricted Stock</td><td>Number of Shares</td><td>Weighted-Average Grant Date Fair Value per Share</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td></tr><tr><td>Nonvested at December 31, 2009.</td><td>2,019,777</td><td>$12.52</td></tr><tr><td>Granted(a).</td><td>636,273</td><td>16.22</td></tr><tr><td>Vested.</td><td>(457,430)</td><td>14.41</td></tr><tr><td>Forfeited(b).</td><td>(205,155)</td><td>12.62</td></tr><tr><td>Nonvested at December 31, 2010.</td><td>1,993,465</td><td>13.26</td></tr><tr><td>CONSUMERS</td><td></td><td></td></tr><tr><td>Nonvested at December 31, 2009.</td><td>1,809,987</td><td>$12.50</td></tr><tr><td>Granted(a).</td><td>575,895</td><td>16.27</td></tr><tr><td>Vested.</td><td>(396,760)</td><td>14.38</td></tr><tr><td>Forfeited(b).</td><td>(184,099)</td><td>12.62</td></tr><tr><td>Nonvested at December 31, 2010.</td><td>1,805,023</td><td>13.28</td></tr></table>



## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

CMS Energy and Consumers charge the fair value of the awards to expense over the required service period. As a result, for awards granted prior to August 1, 2010, CMS Energy and Consumers recognize all compensation expense for share-based awards that have accelerated service provisions upon retirement by the period in which the employee becomes eligible to retire. TSR restricted stock awards granted after August 1, 2010 have graded vesting features, and CMS Energy and Consumers recognize expense for those awards on a graded vesting schedule over the required service period. Expense for time-lapse awards is recognized on a straight-line basis over the required service period. CMS Energy and Consumers calculate the fair value of time-lapse restricted stock based on the price of CMS Energy's common stock on the grant date. CMS Energy and Consumers calculate the fair value of TSR restricted stock awards on the grant date using a Monte Carlo simulation. CMS Energy and Consumers base expected volatilities on the historical volatility of the price of CMS Energy common stock.

The risk-free rate for each valuation was based on the three-year U.S. Treasury yield at the award grant date. Presented in the following table are the significant assumptions used to estimate the fair value of the TSR restricted stock awards:

<table><tr><td></td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td>Expected volatility</td><td>30.1%</td><td>29.8%</td><td>19.7%</td></tr><tr><td>Expected dividend yield</td><td>2.4%</td><td>2.0%</td><td>2.7%</td></tr><tr><td>Risk-free rate</td><td>0.9%</td><td>1.8%</td><td>2.8%</td></tr></table>

Presented in the following table are amounts related to restricted stock awards:

<table><tr><td></td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td></td><td colspan="3">In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Fair value of shares that vested during the year</td><td>$7</td><td>$4</td><td>$2</td></tr><tr><td>Compensation expense recognized</td><td>9</td><td>9</td><td>8</td></tr><tr><td>Income tax benefit recognized</td><td>4</td><td>3</td><td>3</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Fair value of shares that vested during the year</td><td>$6</td><td>$4</td><td>$2</td></tr><tr><td>Compensation expense recognized</td><td>9</td><td>8</td><td>7</td></tr><tr><td>Income tax benefit recognized</td><td>3</td><td>3</td><td>2</td></tr></table>

At December 31, 2010, $10 million of total unrecognized compensation cost was related to restricted stock for CMS Energy, including Consumers, and $9 million of total unrecognized compensation cost was related to restricted stock for Consumers. CMS Energy and Consumers expect to recognize this cost over a weighted-average period of 2.1 years.



## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following table is stock option activity under the PISP:

<table><tr><td>Stock Options</td><td>Options Outstanding, Fully Vested, and Exercisable</td><td>Weighted-Average Exercise Price per Share</td><td>Weighted-Average Remaining Contractual Term</td><td>Aggregate Intrinsic Value (in millions)</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Outstanding at December 31, 2009</td><td>581,040</td><td>$19.79</td><td>2.0 years</td><td>$(2)</td></tr><tr><td>Granted.</td><td>—</td><td>—</td><td></td><td></td></tr><tr><td>Exercised</td><td>(74,000)</td><td>$ 6.59</td><td></td><td></td></tr><tr><td>Cancelled or Expired.</td><td>(69,960)</td><td>$17.86</td><td></td><td></td></tr><tr><td>Outstanding at December 31, 2010</td><td>437,080</td><td>$22.34</td><td>1.1 years</td><td>$(2)</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Outstanding at December 31, 2009</td><td>378,786</td><td>$17.74</td><td>2.3 years</td><td>$(1)</td></tr><tr><td>Granted.</td><td>—</td><td>—</td><td></td><td></td></tr><tr><td>Exercised</td><td>(68,818)</td><td>$ 6.61</td><td></td><td></td></tr><tr><td>Cancelled or Expired.</td><td>(42,500)</td><td>$17.52</td><td></td><td></td></tr><tr><td>Outstanding at December 31, 2010</td><td>267,468</td><td>$20.64</td><td>1.2 years</td><td>$(1)</td></tr></table>

Stock options give the holder the right to purchase common stock at the market price on the grant date. Stock options are exercisable upon grant, and expire up to ten years and one month from the grant date. CMS Energy and Consumers issue new shares when recipients exercise stock options. The total intrinsic value of stock options exercised for CMS Energy was $1 million in 2010, less than $1 million in 2009, and $1 million in 2008. The total intrinsic value of stock options exercised for Consumers was $1 million in 2010 and less than $1 million in 2009 and 2008. Cash received from exercise of these stock options in 2010 was less than $1 million for CMS Energy and Consumers.

Since CMS Energy has utilized tax loss carryforwards, CMS Energy was unable to realize excess tax benefits upon exercise of stock options and vesting of restricted stock. Therefore, CMS Energy did not recognize the related excess tax benefits in equity. As of December 31, 2010, CMS Energy has $20 million of unrealized excess tax benefits.

Presented in the following table is the weighted-average grant-date fair value of awards under the PISP:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Weighted-average grant-date fair value per share</td><td></td><td></td><td></td></tr><tr><td>Restricted stock granted</td><td>$16.22</td><td>$13.49</td><td>$10.38</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Weighted-average grant-date fair value per share</td><td></td><td></td><td></td></tr><tr><td>Restricted stock granted</td><td>$16.27</td><td>$13.44</td><td>$10.43</td></tr></table>

## 14: LEASES

CMS Energy and Consumers lease various assets, including service vehicles, railcars, gas pipeline capacity, and buildings. In addition, CMS Energy and Consumers account for a number of their PPAs as capital and operating leases.



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Operating leases for coal-carrying railcars have lease terms expiring without extension provisions over the next 13 years and with extension provisions over the next 16 years. These leases contain fair market value extension and buyout provisions, with some providing for predetermined extension period rentals. Capital leases for Consumers' vehicle fleet operations have a maximum term of 120 months with some having Terminal Rental Adjustment Clause end-of-life provisions and others having fixed percentage purchase options.

Consumers has capital leases for gas transportation pipelines to the Karn generating complex and Zeeland. The capital lease for the gas transportation pipeline into the Karn generating complex has a term of 15 years with a provision to extend the contract from month to month. The remaining term of the contract was 11 years at December 31, 2010. The capital lease for the gas transportation pipeline to Zeeland has a term of 12 years with a renewal provision at the end of the contract. The remaining term of the contract was one year at December 31, 2010. The remaining terms of Consumers' long-term PPAs range between two and 20 years. Most of these PPAs contain provisions at the end of the initial contract terms to renew the agreements annually.

Consumers is authorized by the MPSC to record operating lease payments as operating expense and recover the total cost from customers. Presented in the following table is CMS Energy’s and Consumers’ operating lease expense:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td></td><td>In Millions</td><td></td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Operating lease expense</td><td>$28</td><td>$34</td><td>$28</td></tr><tr><td>Income from subleases</td><td>—</td><td>—</td><td>(1)</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Operating lease expense</td><td>$28</td><td>$34</td><td>$27</td></tr></table>

Presented in the following table are the minimum annual rental commitments under Consumers' non-cancelable leases at December 31, 2010. CMS Energy did not have any non-cancelable leases at December 31, 2010 that were not included in Consumers' amounts.

<table><tr><td></td><td>Capital Leases</td><td>Finance Lease(a) In Millions</td><td>Operating Leases</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>2011</td><td>$ 17</td><td>$ 21</td><td>$ 29</td></tr><tr><td>2012</td><td>20</td><td>20</td><td>30</td></tr><tr><td>2013</td><td>12</td><td>20</td><td>27</td></tr><tr><td>2014</td><td>11</td><td>19</td><td>26</td></tr><tr><td>2015</td><td>12</td><td>18</td><td>25</td></tr><tr><td>2016 and thereafter</td><td>44</td><td>96</td><td>123</td></tr><tr><td>Total minimum lease payments</td><td>$116</td><td>$194</td><td>$260</td></tr><tr><td>Less imputed interest</td><td>52</td><td>46</td><td></td></tr><tr><td>Present value of net minimum lease payments</td><td>$ 64</td><td>$148</td><td></td></tr><tr><td>Less current portion</td><td>11</td><td>13</td><td></td></tr><tr><td>Non-current portion</td><td>$ 53</td><td>$135</td><td></td></tr></table>



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(a) In 2007, Consumers sold Palisades to Entergy and entered into a 15-year PPA to buy all of the capacity and energy then capable of being produced by Palisades. Consumers has continuing involvement with Palisades through security provided to Entergy for Consumers' PPA obligation, Consumers' DOE liability, and other forms of involvement. Because of these ongoing arrangements, Consumers accounted for the transaction as a financing of Palisades and not a sale. Accordingly, no gain on the sale of Palisades was recognized on the Consolidated Statements of Income. Consumers accounted for the remaining non-real-estate assets and liabilities associated with the transaction as a sale.

Palisades remains on Consumers’ Consolidated Balance Sheets and Consumers continues to depreciate it. Consumers recorded the related proceeds as a finance obligation with payments recorded to interest expense and the finance obligation based on the amortization of the obligation over the life of the Palisades PPA. The value of the finance obligation was determined based on an allocation of the transaction proceeds to the fair values of the net assets sold and fair value of the plant asset under the financing. Total amortization and interest charges under the financing were $22 million and $23 million, respectively, for each of the years ended December 31, 2010 and 2009.

## 15: PLANT, PROPERTY, AND EQUIPMENT

Presented in the following table are CMS Energy’s and Consumers’ plant, property, and equipment:

<table><tr><td rowspan="2">Years Ended December 31</td><td rowspan="2">Estimated Depreciable Life in Years</td><td colspan="2">2010</td></tr><tr><td colspan="2">In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Electric:</td><td></td><td></td><td></td></tr><tr><td>Generation</td><td>18-85</td><td>$ 3,812</td><td>$3,671</td></tr><tr><td>Distribution</td><td>12-75</td><td>5,250</td><td>4,991</td></tr><tr><td>Other</td><td>7-40</td><td>609</td><td>574</td></tr><tr><td>Capital and finance leases(a)</td><td></td><td>273</td><td>289</td></tr><tr><td>Gas:</td><td></td><td></td><td></td></tr><tr><td>Underground storage facilities(b)</td><td>30-65</td><td>311</td><td>299</td></tr><tr><td>Transmission</td><td>13-75</td><td>713</td><td>573</td></tr><tr><td>Distribution</td><td>30-80</td><td>2,654</td><td>2,557</td></tr><tr><td>Other</td><td>5-50</td><td>380</td><td>366</td></tr><tr><td>Capital leases(a)</td><td></td><td>5</td><td>17</td></tr><tr><td>Enterprises:</td><td></td><td></td><td></td></tr><tr><td>IPP</td><td>5-30</td><td>85</td><td>329</td></tr><tr><td>Other</td><td>3-40</td><td>17</td><td>16</td></tr><tr><td>Other:</td><td>1-71</td><td>36</td><td>34</td></tr><tr><td>Construction work in progress</td><td></td><td>570</td><td>506</td></tr><tr><td>Less accumulated depreciation, depletion, and amortization(c)</td><td></td><td>4,646</td><td>4,540</td></tr><tr><td>Net plant, property, and equipment(d)</td><td></td><td>$10,069</td><td>$9,682</td></tr></table>



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

<table><tr><td>Years Ended December 31</td><td>Estimated Depreciable Life in Years</td><td>2010</td><td>2009</td></tr><tr><td></td><td></td><td colspan="2">In Millions</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Electric:</td><td></td><td></td><td></td></tr><tr><td>Generation</td><td>18-85</td><td>$ 3,812</td><td>$3,671</td></tr><tr><td>Distribution</td><td>12-75</td><td>5,250</td><td>4,991</td></tr><tr><td>Other</td><td>7-40</td><td>609</td><td>574</td></tr><tr><td>Capital and finance leases(a)</td><td></td><td>273</td><td>289</td></tr><tr><td>Gas:</td><td></td><td></td><td></td></tr><tr><td>Underground storage facilities(b)</td><td>30-65</td><td>311</td><td>299</td></tr><tr><td>Transmission</td><td>13-75</td><td>713</td><td>573</td></tr><tr><td>Distribution</td><td>30-80</td><td>2,654</td><td>2,557</td></tr><tr><td>Other</td><td>5-50</td><td>380</td><td>366</td></tr><tr><td>Capital leases(a)</td><td></td><td>5</td><td>17</td></tr><tr><td>Other non-utility property</td><td>7-71</td><td>15</td><td>15</td></tr><tr><td>Construction work in progress</td><td></td><td>566</td><td>505</td></tr><tr><td>Less accumulated depreciation, depletion, and amortization(c)</td><td></td><td>4,593</td><td>4,386</td></tr><tr><td>Net plant, property, and equipment(d)</td><td></td><td>$ 9,995</td><td>$9,471</td></tr></table>

(a) Capital and finance leases presented are gross amounts. Presented in the following table are changes in Consumers' capital and finance leases:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td></tr><tr><td></td><td colspan="2">In Millions</td></tr><tr><td>CONSUMERS</td><td></td><td></td></tr><tr><td>Balance at beginning of period</td><td>$306</td><td>$312</td></tr><tr><td>Additions</td><td>15</td><td>16</td></tr><tr><td>Net retirements and other adjustments</td><td>(43)</td><td>(22)</td></tr><tr><td>Balance at end of period</td><td>$278</td><td>$306</td></tr></table>

Accumulated amortization of capital and finance leases was $65 million at December 31, 2010 and $84 million at December 31, 2009 for Consumers. There were no significant capital and finance leases at CMS Energy.

(b) Underground storage includes base natural gas of $26 million at December 31, 2010 and 2009. Base natural gas is not subject to depreciation.

(c) Presented in the following table is CMS Energy’s and Consumers’ accumulated depreciation, depletion, and amortization:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td></tr><tr><td></td><td colspan="2">In Millions</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td></tr><tr><td>Utility plant assets</td><td>$4,592</td><td>$4,385</td></tr><tr><td>Non-utility plant assets</td><td>54</td><td>155</td></tr><tr><td>CONSUMERS</td><td></td><td></td></tr><tr><td>Utility plant assets</td><td>$4,592</td><td>$4,385</td></tr><tr><td>Non-utility plant assets</td><td>1</td><td>1</td></tr></table>

(d) For the year ended December 31, 2010, utility plant additions were $783 million and utility plant retirements were $85 million. For the year ended December 31, 2009, utility plant additions were $928 million and utility plant retirements were $171 million.



## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Intangible Assets: Included in net plant, property, and equipment are intangible assets. Presented in the following table are CMS Energy’s and Consumers’ intangible assets:

<table><tr><td colspan="6">Years Ended December 31</td></tr><tr><td rowspan="2">Description</td><td rowspan="2">Amortization Life in years</td><td colspan="2">2010</td><td colspan="2">2009</td></tr><tr><td>Gross Cost(a)</td><td>Accumulated Amortization In Millions</td><td>Gross Cost(a)</td><td>Accumulated Amortization</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Software development</td><td>3-15</td><td>$323</td><td>$125</td><td>$303</td><td>$105</td></tr><tr><td>Plant acquisition adjustments</td><td>40</td><td>213</td><td>16</td><td>214</td><td>11</td></tr><tr><td>Rights of way</td><td>50-75</td><td>140</td><td>37</td><td>134</td><td>35</td></tr><tr><td>Leasehold improvements</td><td>various(b)</td><td>13</td><td>9</td><td>13</td><td>9</td></tr><tr><td>Franchises and consents</td><td>5-30</td><td>15</td><td>6</td><td>15</td><td>6</td></tr><tr><td>Other intangibles(c)</td><td>various</td><td>20</td><td>14</td><td>28</td><td>21</td></tr><tr><td>Total</td><td></td><td>$724</td><td>$207</td><td>$707</td><td>$187</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Software development</td><td>3-15</td><td>$323</td><td>$125</td><td>$303</td><td>$105</td></tr><tr><td>Plant acquisition adjustments</td><td>40</td><td>213</td><td>16</td><td>214</td><td>11</td></tr><tr><td>Rights of way</td><td>50-75</td><td>140</td><td>37</td><td>134</td><td>35</td></tr><tr><td>Leasehold improvements</td><td>various(b)</td><td>13</td><td>9</td><td>13</td><td>9</td></tr><tr><td>Franchises and consents</td><td>5-30</td><td>15</td><td>6</td><td>15</td><td>6</td></tr><tr><td>Other intangibles</td><td>various</td><td>18</td><td>14</td><td>18</td><td>13</td></tr><tr><td>Total</td><td></td><td>$722</td><td>$207</td><td>$697</td><td>$179</td></tr></table>

(a) Intangible asset additions for Consumers’ utility plant were $25 million during 2010 and $62 million during 2009. Retirements were less than $1 million in 2010 and were $110 million during 2009.

(b) Leasehold improvements are amortized over the life of the lease, which may change whenever the lease is renewed or extended.

(c) Effective January 1, 2010, CMS Energy deconsolidated Genesee. As a result of the deconsolidation, other intangible assets were reduced by $8 million.

Presented in the following table is CMS Energy’s and Consumers’ amortization expense related to intangible assets:

<table><tr><td rowspan="3">Years Ended December 31</td><td colspan="2">CMS Energy (including Consumers)</td><td colspan="2">Consumers</td></tr><tr><td>Total Amortization Expense</td><td>Software Amortization Expense</td><td>Total Amortization Expense</td><td>Software Amortization Expense</td></tr><tr><td colspan="4">In Millions</td></tr><tr><td>2010</td><td>$28</td><td>$19</td><td>$27</td><td>$19</td></tr><tr><td>2009</td><td>30</td><td>22</td><td>30</td><td>22</td></tr><tr><td>2008</td><td>32</td><td>27</td><td>32</td><td>23</td></tr></table>

Amortization of intangible assets is expected to range between $34 million and $40 million per year over the next five years.



# CMS Energy Corporation
Consumers Energy Company

# NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

At December 31, 2010 and 2009, CMS Energy had less than $1 million of goodwill recorded on its Consolidated Balance Sheets.

## 16: ASSET RETIREMENT OBLIGATIONS

CMS Energy and Consumers record the fair value of the cost to remove assets at the end of their useful lives, if there is a legal obligation to remove them. No market risk premiums were included in CMS Energy's and Consumers' ARO fair value estimates since reasonable estimates could not be made. If a five percent market risk premium were assumed, CMS Energy's and Consumers' ARO liabilities at December 31, 2010 would increase by $12 million and at December 31, 2009 would increase by $11 million, respectively.

If a reasonable estimate of fair value cannot be made in the period in which the ARO is incurred, such as for assets with indeterminate lives, the liability is recognized when a reasonable estimate of fair value can be made. CMS Energy and Consumers have not recorded liabilities for assets that have insignificant cumulative disposal costs, such as substation batteries.

Presented below are the categories of assets that CMS Energy and Consumers have legal obligations to remove at the end of their useful lives and for which they have an ARO liability recorded:

<table><tr><td>Company and ARO Description</td><td>In-Service Date</td><td>Long-Lived Assets</td></tr><tr><td>CMS Energy, Including Consumers</td><td></td><td></td></tr><tr><td>Close gas treating plant and gas wells</td><td>Various</td><td>Gas transmission and storage</td></tr><tr><td>Closure of coal ash disposal areas</td><td>Various</td><td>Generating plants coal ash areas</td></tr><tr><td>Closure of wells at gas storage fields</td><td>Various</td><td>Gas storage fields</td></tr><tr><td>Indoor gas services equipment relocations</td><td>Various</td><td>Gas meters located inside structures</td></tr><tr><td>Asbestos abatement</td><td>1973</td><td>Electric and gas utility plant</td></tr><tr><td>Gas distribution cut, purge and cap</td><td>Various</td><td>Gas distribution mains and services</td></tr><tr><td>Consumers</td><td></td><td></td></tr><tr><td>Closure of coal ash disposal areas</td><td>Various</td><td>Generating plants coal ash areas</td></tr><tr><td>Closure of wells at gas storage fields</td><td>Various</td><td>Gas storage fields</td></tr><tr><td>Indoor gas services equipment relocations</td><td>Various</td><td>Gas meters located inside structures</td></tr><tr><td>Asbestos abatement</td><td>1973</td><td>Electric and gas utility plant</td></tr><tr><td>Gas distribution cut, purge and cap</td><td>Various</td><td>Gas distribution mains and services</td></tr></table>

No assets have been restricted for purposes of settling AROs.



## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following tables are the changes in CMS Energy’s and Consumers’ ARO liabilities:

<table><tr><td>Company and ARO Description</td><td>ARO Liability 12/31/09</td><td>Incurred</td><td>Settled(a)</td><td>Accretion</td><td>Cash flow Revisions</td><td>ARO Liability 12/31/10</td></tr><tr><td>CMS Energy, Including Consumers</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Close gas treating plant and gas wells . . .</td><td>$ 1</td><td>$—</td><td>$—</td><td>$—</td><td>$—</td><td>$ 1</td></tr><tr><td>Consumers</td><td>228</td><td>6</td><td>(7)</td><td>17</td><td>—</td><td>244</td></tr><tr><td>Total CMS Energy . . . . . . . . . . . . . . . . . . . .</td><td>$229</td><td>$ 6</td><td>$ (7)</td><td>$17</td><td>$—</td><td>$245</td></tr><tr><td>Consumers</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Coal ash disposal areas . . . . . . . . . . . . . . . . . . . .</td><td>$ 64</td><td>$—</td><td>$ (4)</td><td>$ 6</td><td>$—</td><td>$ 66</td></tr><tr><td>Wells at gas storage fields . . . . . . . . . . . . . . . . . . . .</td><td>1</td><td>—</td><td>—</td><td>—</td><td>—</td><td>1</td></tr><tr><td>Indoor gas services relocations . . . . . . . . . . . . . . . . . . . .</td><td>1</td><td>—</td><td>—</td><td>—</td><td>—</td><td>1</td></tr><tr><td>Asbestos abatement . . . . . . . . . . . . . . . . . . . .</td><td>38</td><td>—</td><td>(1)</td><td>3</td><td>—</td><td>40</td></tr><tr><td>Gas distribution cut, purge, cap . . . . . . . . . . . . . . . . . . . .</td><td>124</td><td>6</td><td>(2)</td><td>8</td><td>—</td><td>136</td></tr><tr><td>Total Consumers . . . . . . . . . . . . . . . . . . . .</td><td>$228</td><td>$ 6</td><td>$ (7)</td><td>$17</td><td>$—</td><td>$244</td></tr><tr><td>Company and ARO Description</td><td>ARO Liability 12/31/08</td><td>Incurred</td><td>Settled(a)</td><td>Accretion</td><td>Cash flow Revisions</td><td>ARO Liability 12/31/09</td></tr><tr><td>CMS Energy, Including Consumers</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Close gas treating plant and gas wells . . .</td><td>$ 1</td><td>$—</td><td>$—</td><td>$—</td><td>$—</td><td>$ 1</td></tr><tr><td>Consumers</td><td>205</td><td>15</td><td>(8)</td><td>16</td><td>—</td><td>228</td></tr><tr><td>Total CMS Energy . . . . . . . . . . . . . . . . . . . .</td><td>$206</td><td>$15</td><td>$ (8)</td><td>$16</td><td>$—</td><td>$229</td></tr><tr><td>Consumers</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Coal ash disposal areas . . . . . . . . . . . . . . . . . . . .</td><td>$ 62</td><td>$—</td><td>$ (4)</td><td>$ 6</td><td>$—</td><td>$ 64</td></tr><tr><td>Wells at gas storage fields . . . . . . . . . . . . . . . . . . . .</td><td>1</td><td>—</td><td>—</td><td>—</td><td>—</td><td>1</td></tr><tr><td>Indoor gas services relocations . . . . . . . . . . . . . . . . . . . .</td><td>1</td><td>—</td><td>—</td><td>—</td><td>—</td><td>1</td></tr><tr><td>Asbestos abatement . . . . . . . . . . . . . . . . . . . .</td><td>36</td><td>—</td><td>(1)</td><td>3</td><td>—</td><td>38</td></tr><tr><td>Gas distribution cut, purge, cap . . . . . . . . . . . . . . . . . . . .</td><td>105</td><td>15</td><td>(3)</td><td>7</td><td>—</td><td>124</td></tr><tr><td>Total Consumers . . . . . . . . . . . . . . . . . . . .</td><td>$205</td><td>$15</td><td>$ (8)</td><td>$16</td><td>$—</td><td>$228</td></tr></table>

(a) Cash payments of $7 million in 2010 and $8 million in 2009 were included in the other current and non-current liabilities line in Net cash provided by operating activities in CMS Energy’s and Consumers’ Consolidated Statements of Cash Flows.



## 17: JOINTLY OWNED REGULATED UTILITY FACILITIES

Presented in the following table are Consumers’ investments in jointly owned regulated utility facilities:

<table><tr><td rowspan="3">December 31</td><td rowspan="3">Ownership Share (%)</td><td colspan="3">Net Investment(a)</td><td colspan="3">Accumulated Depreciation</td><td colspan="2">Construction Work in Progress</td></tr><tr><td rowspan="2">2010</td><td rowspan="2">2009</td><td rowspan="2">2010</td><td rowspan="2">2009</td><td colspan="3">In Millions</td><td></td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td>Campbell Unit 3</td><td>93.3</td><td>$653</td><td>$662</td><td>$404</td><td>$387</td><td>$23</td><td>$14</td><td></td><td></td></tr><tr><td>Ludington</td><td>51.0</td><td>60</td><td>62</td><td>114</td><td>111</td><td>11</td><td>5</td><td></td><td></td></tr><tr><td>Distribution</td><td>Various</td><td>115</td><td>105</td><td>44</td><td>43</td><td>7</td><td>7</td><td></td><td></td></tr></table>

(a) Net investment is the amount of utility plant in service less accumulated depreciation.

Consumers includes its share of the direct expenses of the jointly owned plants in Operating Expenses. Consumers shares operation, maintenance, and other expenses of these jointly owned utility facilities in proportion to each participant’s undivided ownership interest. Consumers is required to provide only its share of financing for the jointly owned utility facilities.

## 18: VARIABLE INTEREST ENTITIES

Entities that are VIEs must be consolidated if the reporting entity determines that it has a controlling financial interest. The entity that is required to consolidate the VIE is called the primary beneficiary. Variable interests are contractual, ownership, or other interests in an entity that change as the fair value of the VIE's net assets, excluding variable interests, changes. An entity is considered to be a VIE when its capital is insufficient to permit it to finance its activities without additional subordinated financial support or its equity investors, as a group, lack the characteristics of having a controlling financial interest.

Effective January 1, 2010, the accounting standards for consolidation of VIEs were amended. The most significant amendment changed the criteria for identifying the primary beneficiary. Under the amended standard, the primary beneficiary is the entity that has both (1) the power to direct the activities of a VIE that most significantly impact the VIE's economic performance and (2) the obligation to absorb losses of the VIE that could potentially be significant to the VIE.

As a result of adopting this amendment, effective January 1, 2010, CMS Energy has consolidated CMS Energy Trust I and deconsolidated three partnerships that it had previously consolidated.

CMS Energy has consolidated CMS Energy Trust I because CMS Energy is the variable interest holder that designed the entity and, through the design, has the power to direct the activities of CMS Energy Trust I that most significantly impact the trust’s economic performance. CMS Energy has guaranteed payment of the Trust Preferred Securities. The sole assets of the trust consist of subordinated notes issued by CMS Energy, and the sole liabilities of the trust consist of Trust Preferred Securities. Upon consolidation, CMS Energy reduced its equity method investment by $5 million and its Long-term debt by $34 million. CMS Energy also recorded a $29 million liability for the mandatorily redeemable preferred securities issued by the trust. No gain or loss was recognized on the consolidation of CMS Energy Trust I.

CMS Energy has deconsolidated T.E.S. Filer City, Grayling, and Genesee because CMS Energy determined that power is shared among unrelated parties, and that no one party has the power to direct the activities that most significantly impact the entities' economic performance. The partners must agree on all major decisions for each of the partnerships. As a result, CMS Energy is not the primary beneficiary of these partnerships.



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Presented in the following table is information about these partnerships:

<table><tr><td>Name (Ownership Interest)</td><td>Nature of the Entity</td><td>Financing of Partnership</td></tr><tr><td>T.E.S. Filer City (50%)</td><td>Coal-fueled power generator</td><td>Non-recourse long-term debt that matured in December 2007.</td></tr><tr><td>Grayling (50%)</td><td>Wood waste-fueled power generator</td><td>Sale of revenue bonds that mature in November 2012 and bear interest at variable rates. The debt is recourse to the partnership, but not the individual partners, and secured by a letter of credit equal to the outstanding balance.</td></tr><tr><td>Genesee (50%)</td><td>Wood waste-fueled power generator</td><td>Sale of revenue bonds that mature in 2021 and bear interest at fixed rates. The debt is non-recourse to the partnership and secured by a CMS Energy guarantee capped at $3 million annually.</td></tr></table>

CMS Energy has operating and management contracts with Grayling and Genesee, and Consumers is the primary purchaser of power from each partnership through long-term PPAs. Consumers also has reduced dispatch agreements with Grayling and Genesee, which allow these facilities to be dispatched based on the market price of wood waste. This results in fuel cost savings that each partnership shares with Consumers' customers.

CMS Energy’s investment in these partnerships is included in Investments on its Consolidated Balance Sheets in the amount of $49 million as of December 31, 2010. The partnerships were consolidated at December 31, 2009. Total assets of the partnerships were $189 million and total liabilities were $92 million at December 31, 2009. The partnerships had third-party debt obligations totaling $70 million at December 31, 2009. Plant, property, and equipment serving as collateral for these obligations had a carrying value of $137 million at December 31, 2009. The creditors of these partnerships do not have recourse to the general credit of CMS Energy or Consumers, except through a guarantee provided by CMS Energy of $3 million annually. CMS Energy has deferred collections on certain receivables owed by Genesee. CMS Energy’s maximum exposure to loss from these receivables is $6 million. Consumers has not provided any financial or other support during the periods presented that was not previously contractually required.

## 19: RELATED-PARTY TRANSACTIONS — CONSUMERS

Consumers enters into a number of significant transactions with related parties. These transactions include:

• purchase and sale of electricity from and to CMS Enterprises;

• payment of parent company overhead costs to CMS Energy; and

• investment in CMS Energy common stock.

Transactions involving power supply purchases from certain affiliates of CMS Enterprises are based on avoided costs under PURPA, state law, and competitive bidding. The payment of parent company overhead costs is based on the use of accepted industry allocation methodologies. These payments are for costs that occur in the normal course of business. Presented in the following table are Consumers' recorded income and expense from related parties as of December 31:

<table><tr><td>Description</td><td>Related Party</td><td>2010</td><td>2009 In Millions</td><td>2008</td></tr><tr><td>Purchases of capacity and energy</td><td>Affiliates of CMS Enterprises</td><td>(84)</td><td>(81)</td><td>(75)</td></tr><tr><td>Dividend income</td><td>CMS Energy</td><td>1</td><td>1</td><td>1</td></tr></table>



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Amounts payable to related parties for purchased power and other services were $11 million at December 31, 2010 and 2009.

Consumers owns 1.8 million shares of CMS Energy common stock with a fair value of $34 million at December 31, 2010. For additional details on Consumers’ investment in CMS Energy common stock, see Note 9, Financial Instruments.

## 20: ASSET SALES, DISCONTINUED OPERATIONS, AND IMPAIRMENT CHARGES

## ASSET SALES

The impacts of asset sales are included in Gain on asset sales, net and Income (Loss) from Discontinued Operations in CMS Energy’s Consolidated Statements of Income, and they are included in Loss (gain) on asset sales, net in Consumers’ Consolidated Statements of Income. Asset sales for CMS Energy and Consumers were immaterial for the years ended December 31, 2010, 2009, and 2008.

In connection with the sale of CMS Energy’s Argentine and Michigan assets to Lucid Energy in 2007, CMS Energy entered into agreements that granted MEI, an affiliate of Lucid Energy, the right to any proceeds from an assignment of an arbitration award associated with TGN. The agreements also granted MEI an option to purchase CMS Gas Transmission’s ownership interests in TGN, and the rights to any proceeds CMS Enterprises would receive if it sold its stock interest in CMS Generation San Nicolas Company.

In 2008, CMS Energy executed an agreement with MEI and a third party to assign the arbitration award and to sell its interests in TGN directly to the third party. In accordance with the agreements executed in 2007, the proceeds from the assignment of the arbitration award and the sale of TGN were passed on to MEI, and in 2008, CMS Energy recognized an $8 million gain on the assignment of the award in Gain on asset sales, net on CMS Energy's Consolidated Statements of Income. CMS Energy also recognized a $197 million cumulative net foreign currency translation loss related to TGN, which had been deferred as a Foreign currency translation component of stockholders' equity. This charge was fully offset by the elimination of a $197 million Argentine currency impairment reserve on CMS Energy's Consolidated Balance Sheets, created when it impaired its investment in TGN in 2007.

In 2010, CMS Enterprises exercised its option to sell its stock interest in CMS Generation San Nicolas Company and transferred the sale proceeds to MEI. As a result, CMS Enterprises recognized a $3 million net gain. In 2010, CMS Enterprises also sold a cost-method investment with a carrying value of zero, and recognized a $3 million gain.



## Discontinued Operations

Discontinued operations are a component of the enterprises segment. CMS Energy included the following amounts in Income (Loss) From Discontinued Operations:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009 In Millions</td><td>2008</td></tr><tr><td>Revenues</td><td>$ 10</td><td>$ 7</td><td>$14</td></tr><tr><td>Discontinued operations:</td><td></td><td></td><td></td></tr><tr><td>Pretax income (loss) from discontinued operations</td><td>$ (21)</td><td>$33</td><td>$ 2</td></tr><tr><td>Income tax expense</td><td>2</td><td>13</td><td>1</td></tr><tr><td>Income (Loss) From Discontinued Operations, Net of Tax Expense</td><td>$ (23)(a)</td><td>$20(b)</td><td>$ 1</td></tr></table>

(a) Includes an operating loss of $2 million ($1 million net of tax) at Exeter, whose assets and liabilities were reclassified as held for sale in 2009.

Also includes disposal-related losses of $10 million in additional tax expense resulting from an IRS audit adjustment related to a 2003 asset sale, a $6 million ($4 million net of tax) loss for the write down of CMS Energy's investment in Exeter, a $5 million ($3 million net of tax) loss for the increase in a liability for a 2007 asset sale, and a $5 million ($3 million net of tax) loss on the settlement of a 2002 asset sale indemnity.

(b) Includes an operating loss of $11 million ($7 million net of tax) at Exeter and a loss of $3 million ($2 million net of tax) related to the State Street Bank and TSU litigation at CMS Viron. For additional details on CMS Viron, see Note 5, Contingencies and Commitments.

Also includes a gain for the expiration of an indemnity obligation related to a 2007 asset sale. CMS Energy provided an indemnity to TAQA in connection with the sale of its ownership interests in businesses in the Middle East, Africa, and India, and recorded a $50 million provision for the contingent liability. This indemnity expired in 2009 and CMS Energy eliminated the liability from its Consolidated Balance Sheets, recognizing a $45 million benefit ($28 million net of tax) to Income (Loss) from Discontinued Operations and a $5 million benefit to Gain on asset sales, net.

Discontinued operations include a provision for closing costs and a portion of CMS Energy’s parent company interest expense. CMS Energy allocated interest expense of less than $1 million in each of 2010 and 2009 and $1 million in 2008. CMS Energy allocates its interest expense by applying its total interest expense to the net carrying amount of the asset sold divided by CMS Energy’s total capitalization.

During the fourth quarter of 2009, CMS Energy’s management committed to a plan to sell its interest in Exeter and initiated an active program to locate potential buyers. CMS Energy completed the sale of this business in



# CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

January 2011. Presented in the following table are the major classes of assets and liabilities of Exeter classified as held for sale on CMS Energy’s Consolidated Balance Sheets in 2010 and 2009:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td></tr><tr><td></td><td>In Millions</td><td></td></tr><tr><td>Assets:</td><td></td><td></td></tr><tr><td>Current Assets:</td><td></td><td></td></tr><tr><td>Cash</td><td>$1</td><td>$ 1</td></tr><tr><td>Accounts receivable, net</td><td>1</td><td>1</td></tr><tr><td>Non-Current Assets:</td><td></td><td></td></tr><tr><td>Plant, property, and equipment, net</td><td>3</td><td>8</td></tr><tr><td>Other</td><td>1</td><td>1</td></tr><tr><td>Total assets</td><td>$6</td><td>$11</td></tr><tr><td>Liabilities:</td><td></td><td></td></tr><tr><td>Current Liabilities</td><td>$1</td><td>$—</td></tr><tr><td>Total liabilities</td><td>$1</td><td>$—</td></tr></table>

## IMPAIRMENT CHARGES

In 2010, CMS Energy wrote down its investment in Exeter from its carrying amount of $11 million to Exeter’s fair value of $5 million. This valuation was based on the price that CMS Energy received for the sale of Exeter, which closed in January 2011. The impairment resulted in a loss of $6 million, which was recorded in earnings as part of discontinued operations for the year ended December 31, 2010.

In May 2010, Consumers announced plans to defer the development of its proposed 830 MW coal-fueled plant at its Karn/Weadock generating complex. At that time, Consumers recorded a charge of $3 million to write off certain capitalized development costs because the costs were deemed not to have long-term value in connection with the potential future construction of the plant. The project’s air permit, issued by the MDNRE in December 2009, will expire in August 2011 if construction of the coal plant has not commenced or if Consumers has not been granted an extension of the air permit. In December 2010, Consumers determined that it would not begin construction before August 2011 as a means of preserving the air permit. As a result, the likelihood that the plant will be constructed has diminished significantly. In December 2010, in accordance with accounting standards governing impairment of plant costs for regulated utilities, Consumers recorded an additional charge of $19 million to write off the remaining previously capitalized development costs associated with the proposed plant. The total charge of $22 million was recorded in other operating expenses for the year ended December 31, 2010.

CMS Energy and Consumers recorded no other impairments of long-lived assets for the years ended December 31, 2010, 2009, and 2008.

## 21: REPORTABLE SEGMENTS

Reportable segments consist of business units defined by the products and services they offer. CMS Energy and Consumers evaluate the performance of each segment based on its contribution to net income available to CMS Energy’s common stockholders. The reportable segments for CMS Energy and Consumers are:

CMS Energy:

• electric utility, consisting of regulated activities associated with the generation and distribution of electricity in Michigan;



# CMS Energy Corporation
Consumers Energy Company

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

• gas utility, consisting of regulated activities associated with the transportation, storage, and distribution of natural gas in Michigan;

• enterprises, consisting of various subsidiaries engaging primarily in domestic IPP; and

• other, including EnerBank, corporate interest and other expenses, and discontinued operations.

Consumers:

• electric utility, consisting of regulated activities associated with the generation and distribution of electricity in Michigan;

• gas utility, consisting of regulated activities associated with the transportation, storage, and distribution of natural gas in Michigan; and

• other, including a consolidated special-purpose entity for the sale of accounts receivable.

Accounting policies for CMS Energy’s and Consumers’ segments are as described in Note 1, Significant Accounting Policies. The Consolidated Financial Statements reflect the assets, liabilities, revenues, and expenses of the individual segments when appropriate. Accounts are allocated among the segments when common accounts are attributable to more than one segment. The allocations are based on certain measures of business activities, such as revenue, labor dollars, customers, other operation and maintenance expense, construction expense, leased property, taxes, or functional surveys. For example, customer receivables are allocated based on revenue, and pension provisions are allocated based on labor dollars.

Inter-segment sales and transfers are accounted for at current market prices and are eliminated in consolidated Net Income Available to Common Stockholders by segment.

Presented in the following tables is financial information by reportable segment:

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td></td><td></td><td>In Millions</td><td></td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Operating Revenue:</td><td></td><td></td><td></td></tr><tr><td>Electric utility</td><td>$ 3,802</td><td>$ 3,407</td><td>$ 3,594</td></tr><tr><td>Gas utility</td><td>2,354</td><td>2,556</td><td>2,827</td></tr><tr><td>Enterprises</td><td>238</td><td>216</td><td>365</td></tr><tr><td>Other</td><td>38</td><td>26</td><td>21</td></tr><tr><td>Total Operating Revenue — CMS Energy</td><td>$ 6,432</td><td>$ 6,205</td><td>$ 6,807</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Operating Revenue:</td><td></td><td></td><td></td></tr><tr><td>Electric utility</td><td>$ 3,802</td><td>$ 3,407</td><td>$ 3,594</td></tr><tr><td>Gas utility</td><td>2,354</td><td>2,556</td><td>2,827</td></tr><tr><td>Total Operating Revenue — Consumers</td><td>$ 6,156</td><td>$ 5,963</td><td>$ 6,421</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Income (Loss) from Equity Method Investees:(a)</td><td></td><td></td><td></td></tr><tr><td>Enterprises</td><td>$ 11</td><td>$ (2)</td><td>$ 5</td></tr><tr><td>Total Income (Loss) from Equity Method Investees — CMS Energy</td><td>$ 11</td><td>$ (2)</td><td>$ 5</td></tr></table>



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Years Ended December 31 2010 2009 2008
In Millions
CMS ENERGY, INCLUDING CONSUMERS
Depreciation and Amortization:
Electric utility $ 450 $ 441 $ 438
Gas utility 122 118 136
Enterprises 3 10 10
Other 1 1 4
Total Depreciation and Amortization — CMS Energy $ 576 $ 570 $ 588
CONSUMERS
Depreciation and Amortization:
Electric utility $ 450 $ 441 $ 438
Gas utility 122 118 136
Total Depreciation and Amortization — Consumers $ 572 $ 559 $ 574
CMS ENERGY, INCLUDING CONSUMERS
Interest Charges:
Electric utility $ 202 $ 225 $ 185
Gas utility 73 66 60
Enterprises — 5 6
Other 156 139 149
Total Interest Charges — CMS Energy $ 431 $ 435 $ 400
CONSUMERS
Interest Charges:
Electric utility $ 202 $ 225 $ 185
Gas utility 73 66 60
Other 2 1 2
Total Interest Charges — Consumers $ 277 $ 292 $ 247
CMS ENERGY, INCLUDING CONSUMERS
Income Tax Expense (Benefit):
Electric utility $ 187 $ 107 $ 153
Gas utility 67 56 45
Enterprises 14 4 (10)
Other (44) (52) (49)
Total Income Tax Expense — CMS Energy $ 224 $ 115 $ 139



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Years Ended December 31
2010
2009
2008
In Millions
Consumers
Income Tax Expense:
Electric utility
Gas utility
Total Income Tax Expense — Consumers
CMS Energy, including Consumers
Net Income (Loss) Available to Common Stockholders:
Electric utility
Gas utility
Enterprises
Discontinued operations
Other
Total Net Income Available to Common Stockholders — CMS Energy
Consumers
Net Income Available to Common Stockholder:
Electric utility
Gas utility
Other
Total Net Income Available to Common Stockholder — Consumers
CMS Energy, including Consumers
Investments in Equity Method Investees:(a)
Enterprises
Other
Total Investments in Equity Method Investees — CMS Energy
CMS Energy, including Consumers
Plant, Property, and Equipment, Gross
Electric utility
Gas utility
Enterprises
Other
Total Plant, Property, and Equipment — CMS Energy
$ 9,944
$ 9,525
$ 8,965
$ 4,063
$ 3,812
$ 3,622
$ 102
$ 345
$ 340
$ 36
$ 34
$ 33
$ 14,145
$ 13,716
$ 12,960



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td></td><td></td><td>In Millions</td><td></td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Plant, Property, and Equipment, Gross</td><td></td><td></td><td></td></tr><tr><td>Electric utility</td><td>$ 9,944</td><td>$ 9,525</td><td>$ 8,965</td></tr><tr><td>Gas utility</td><td>4,063</td><td>3,812</td><td>3,622</td></tr><tr><td>Other</td><td>15</td><td>15</td><td>15</td></tr><tr><td>Total Plant, Property, and Equipment — Consumers</td><td>$14,022</td><td>$13,352</td><td>$12,602</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Total Assets:</td><td></td><td></td><td></td></tr><tr><td>Electric utility(b)</td><td>$ 9,321</td><td>$ 9,157</td><td>$ 8,904</td></tr><tr><td>Gas utility(b)</td><td>4,614</td><td>4,594</td><td>4,565</td></tr><tr><td>Enterprises</td><td>191</td><td>303</td><td>313</td></tr><tr><td>Other</td><td>1,490</td><td>1,202</td><td>1,119</td></tr><tr><td>Total Assets — CMS Energy</td><td>$15,616</td><td>$15,256</td><td>$14,901</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Total Assets:</td><td></td><td></td><td></td></tr><tr><td>Electric utility(b)</td><td>$ 9,321</td><td>$ 9,157</td><td>$ 8,904</td></tr><tr><td>Gas utility(b)</td><td>4,614</td><td>4,594</td><td>4,565</td></tr><tr><td>Other</td><td>904</td><td>871</td><td>777</td></tr><tr><td>Total Assets — Consumers</td><td>$14,839</td><td>$14,622</td><td>$14,246</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Capital Expenditures:(c)</td><td></td><td></td><td></td></tr><tr><td>Electric utility</td><td>$ 642</td><td>$ 557</td><td>$ 553</td></tr><tr><td>Gas utility</td><td>235</td><td>270</td><td>241</td></tr><tr><td>Enterprises</td><td>4</td><td>7</td><td>3</td></tr><tr><td>Other</td><td>2</td><td>—</td><td>—</td></tr><tr><td>Total Capital Expenditures — CMS Energy</td><td>$ 883</td><td>$ 834</td><td>$ 797</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td></tr><tr><td>Capital Expenditures:(c)</td><td></td><td></td><td></td></tr><tr><td>Electric utility</td><td>$ 642</td><td>$ 557</td><td>$ 553</td></tr><tr><td>Gas utility</td><td>235</td><td>270</td><td>241</td></tr><tr><td>Total Capital Expenditures — Consumers</td><td>$ 877</td><td>$ 827</td><td>$ 794</td></tr></table>



## 22: QUARTERLY FINANCIAL AND COMMON STOCK INFORMATION (UNAUDITED)

<table><tr><td rowspan="3">Quarters Ended</td><td colspan="4">2010</td></tr><tr><td>March 31</td><td>June 30</td><td>Sept. 30</td><td>Dec. 31</td></tr><tr><td colspan="4">In Millions, Except Per Share Amounts and Stock Prices</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Operating Revenue</td><td>$1,967</td><td>$1,340</td><td>$1,443</td><td>$1,682</td></tr><tr><td>Operating Income</td><td>239</td><td>262</td><td>319</td><td>158</td></tr><tr><td>Income From Continuing Operations</td><td>89</td><td>100</td><td>146</td><td>31</td></tr><tr><td>Loss From Discontinued Operations</td><td>(1)</td><td>(16)</td><td>—</td><td>(6)</td></tr><tr><td>Net Income</td><td>88</td><td>84</td><td>146</td><td>25</td></tr><tr><td>Income Attributable to Noncontrolling Interests</td><td>—</td><td>2</td><td>1</td><td>—</td></tr><tr><td>Net Income Attributable to CMS Energy</td><td>88</td><td>82</td><td>145</td><td>25</td></tr><tr><td>Charge for Deferred Issuance Cost on Preferred Stock</td><td>—</td><td>—</td><td>8</td><td>—</td></tr><tr><td>Preferred Stock Dividends</td><td>3</td><td>2</td><td>3</td><td>—</td></tr><tr><td>Net income Available to Common Stockholders</td><td>85</td><td>80</td><td>134</td><td>25</td></tr><tr><td>Earnings From Continuing Operations Per Average Common Share — Basic(a)</td><td>0.38</td><td>0.42</td><td>0.58</td><td>0.13</td></tr><tr><td>Earnings From Continuing Operations Per Average Common Share — Diluted(a)</td><td>0.35</td><td>0.39</td><td>0.53</td><td>0.11</td></tr><tr><td>Basic Earnings Per Average Common Share(a)</td><td>0.37</td><td>0.35</td><td>0.58</td><td>0.11</td></tr><tr><td>Diluted Earnings Per Average Common Share(a)</td><td>0.34</td><td>0.32</td><td>0.53</td><td>0.09</td></tr><tr><td>Common stock prices(b)</td><td></td><td></td><td></td><td></td></tr><tr><td>High</td><td>15.90</td><td>16.55</td><td>18.15</td><td>19.16</td></tr><tr><td>Low</td><td>14.57</td><td>14.26</td><td>14.68</td><td>17.72</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Operating Revenue</td><td>$1,890</td><td>$1,276</td><td>$1,370</td><td>$1,620</td></tr><tr><td>Operating Income</td><td>224</td><td>207</td><td>304</td><td>191</td></tr><tr><td>Net Income</td><td>107</td><td>88</td><td>160</td><td>79</td></tr><tr><td>Preferred Stock Dividends</td><td>—</td><td>1</td><td>1</td><td>—</td></tr><tr><td>Net Income Available to Common Stockholder</td><td>107</td><td>87</td><td>159</td><td>79</td></tr></table>



## CMS Energy Corporation
Consumers Energy Company
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

<table><tr><td rowspan="3">Quarters Ended</td><td colspan="4">2009</td></tr><tr><td>March 31</td><td>June 30</td><td>Sept. 30</td><td>Dec. 31</td></tr><tr><td colspan="4">In Millions, Except Per Share Amounts and Stock Prices</td></tr><tr><td>CMS ENERGY, INCLUDING CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Operating Revenue</td><td>$2,104</td><td>$1,225</td><td>$1,263</td><td>$1,613</td></tr><tr><td>Operating Income</td><td>210</td><td>150</td><td>230</td><td>108</td></tr><tr><td>Income From Continuing Operations</td><td>75</td><td>55</td><td>76</td><td>14</td></tr><tr><td>Income (Loss) From Discontinued Operations</td><td>(1)</td><td>25</td><td>(1)</td><td>(3)</td></tr><tr><td>Net Income</td><td>74</td><td>80</td><td>75</td><td>11</td></tr><tr><td>Income Attributable to Noncontrolling Interests</td><td>1</td><td>2</td><td>6</td><td>2</td></tr><tr><td>Net Income Attributable to CMS Energy</td><td>73</td><td>78</td><td>69</td><td>9</td></tr><tr><td>Preferred Stock Dividends</td><td>3</td><td>3</td><td>2</td><td>3</td></tr><tr><td>Net Income Available to Common Stockholders</td><td>70</td><td>75</td><td>67</td><td>6</td></tr><tr><td>Earnings From Continuing Operations Per Average Common Share — Basic(a)</td><td>0.32</td><td>0.22</td><td>0.30</td><td>0.04</td></tr><tr><td>Earnings From Continuing Operations Per Average Common Share — Diluted(a)</td><td>0.31</td><td>0.21</td><td>0.29</td><td>0.03</td></tr><tr><td>Basic Earnings Per Average Common Share(a)</td><td>0.31</td><td>0.33</td><td>0.29</td><td>0.03</td></tr><tr><td>Diluted Earnings Per Average Common Share(a)</td><td>0.30</td><td>0.32</td><td>0.28</td><td>0.02</td></tr><tr><td>Common stock prices(b)</td><td></td><td></td><td></td><td></td></tr><tr><td>High</td><td>12.20</td><td>12.30</td><td>13.64</td><td>16.04</td></tr><tr><td>Low</td><td>10.09</td><td>10.98</td><td>11.78</td><td>13.05</td></tr><tr><td>CONSUMERS</td><td></td><td></td><td></td><td></td></tr><tr><td>Operating Revenue</td><td>$2,034</td><td>$1,182</td><td>$1,204</td><td>$1,543</td></tr><tr><td>Operating Income</td><td>203</td><td>174</td><td>218</td><td>94</td></tr><tr><td>Net Income</td><td>99</td><td>72</td><td>101</td><td>21</td></tr><tr><td>Preferred Stock Dividends</td><td>1</td><td>—</td><td>1</td><td>—</td></tr><tr><td>Net Income Available to Common Stockholder</td><td>98</td><td>72</td><td>100</td><td>21</td></tr></table>

(a) The sum of the quarters may not equal the annual EPS due to changes in the number of shares outstanding.
(b) Based on New York Stock Exchange composite transactions.



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# Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of CMS Energy Corporation

In our opinion, the accompanying consolidated balance sheets and the related consolidated statements of income, of cash flows, and of changes in equity present fairly, in all material respects, the financial position of CMS Energy Corporation and its subsidiaries at December 31, 2010 and December 31, 2009, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2010 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedules listed in the index appearing under Item 15(a)(2) present fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2010, based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company's management is responsible for these financial statements and financial statement schedules, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in Management's Annual Report on Internal Control over Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on these financial statements, on the financial statement schedules, and on the Company's internal control over financial reporting based on our integrated audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ PricewaterhouseCoopers LLP

Detroit, Michigan

February 24, 2011



# Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholder of Consumers Energy Company

In our opinion, the accompanying consolidated balance sheets and the related consolidated statements of income, of cash flows, and of changes in equity present fairly, in all material respects, the financial position of Consumers Energy Company and its subsidiaries at December 31, 2010 and December 31, 2009, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2010 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedule listed in the index appearing under Item 15(a)(2) presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2010, based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company's management is responsible for these financial statements and financial statement schedules, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in Management's Annual Report on Internal Control over Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on these financial statements, on the financial statement schedules, and on the Company's internal control over financial reporting based on our integrated audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ PricewaterhouseCoopers LLP

Detroit, Michigan

February 24, 2011



# ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

## CMS Energy

None.

## Consumers

None.

## ITEM 9A. CONTROLS AND PROCEDURES

## CMS Energy

Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures: Under the supervision and with the participation of management, including its CEO and CFO, CMS Energy conducted an evaluation of its disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act). Based on such evaluation, CMS Energy’s CEO and CFO have concluded that its disclosure controls and procedures were effective as of December 31, 2010.

Management’s Annual Report on Internal Control Over Financial Reporting: CMS Energy’s management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Exchange Act Rule 13a-15(f). CMS Energy’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP and includes policies and procedures that:

• pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of CMS Energy;

• provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that receipts and expenditures of CMS Energy are being made only in accordance with authorizations of management and directors of CMS Energy; and

• provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of CMS Energy’s assets that could have a material effect on its financial statements.

Management, including its CEO and CFO, does not expect that its internal controls will prevent or detect all errors and all fraud. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. In addition, any evaluation of the effectiveness of controls is subject to risks that those internal controls may become inadequate in future periods because of changes in business conditions, or that the degree of compliance with the policies or procedures deteriorates.

Under the supervision and with the participation of management, including its CEO and CFO, CMS Energy conducted an evaluation of the effectiveness of its internal control over financial reporting as of December 31, 2010. In making this evaluation, management used the criteria set forth in the framework in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on such evaluation, CMS Energy’s management concluded that its internal control over financial reporting was effective as of December 31, 2010. The effectiveness of CMS Energy’s internal control over financial reporting as of December 31, 2010 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which appears under Item 8.

Changes in Internal Control over Financial Reporting: There have been no changes in CMS Energy’s internal control over financial reporting during the most recently completed fiscal quarter that have materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.



## Consumers

Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures: Under the supervision and with the participation of management, including its CEO and CFO, Consumers conducted an evaluation of its disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act). Based on such evaluation, Consumers’ CEO and CFO have concluded that its disclosure controls and procedures were effective as of December 31, 2010.

Management’s Annual Report on Internal Control Over Financial Reporting: Consumers’ management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Exchange Act Rule 13a-15(f). Consumers’ internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP and includes policies and procedures that:

• pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of Consumers;

• provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that receipts and expenditures of Consumers are being made only in accordance with authorizations of management and directors of Consumers; and

• provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of Consumers’ assets that could have a material effect on its financial statements.

Management, including its CEO and CFO, does not expect that its internal controls will prevent or detect all errors and all fraud. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. In addition, any evaluation of the effectiveness of controls is subject to risks that those internal controls may become inadequate in future periods because of changes in business conditions, or that the degree of compliance with the policies or procedures deteriorates.

Under the supervision and with the participation of management, including its CEO and CFO, Consumers conducted an evaluation of the effectiveness of its internal control over financial reporting as of December 31, 2010. In making this evaluation, management used the criteria set forth in the framework in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on such evaluation, Consumers’ management concluded that its internal control over financial reporting was effective as of December 31, 2010. The effectiveness of Consumers’ internal control over financial reporting as of December 31, 2010 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which appears under Item 8.

Changes in Internal Control over Financial Reporting: There have been no changes in Consumers' internal control over financial reporting during the most recently completed fiscal quarter that have materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.

## ITEM 9B. OTHER INFORMATION

## CMS Energy

None.

## Consumers

None.



## PART III

## ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

## CMS Energy

Information that is required in Item 10 regarding executive officers is included in the Item 1. Business, CMS Energy Executive Officers section, which is incorporated by reference herein.

Information that is required in Item 10 regarding directors, executive officers, and corporate governance is included in CMS Energy’s definitive proxy statement, which is incorporated by reference herein.

## CODE OF ETHICS

CMS Energy adopted a code of ethics that applies to its CEO, CFO and CAO, as well as all other officers and employees of CMS Energy and its affiliates, including Consumers. This code of ethics, entitled “Code of Conduct and Guide to Ethical Business Behavior 2010” is posted on CMS Energy’s website at www.cmsenergy.com, under “Compliance and Ethics”. CMS Energy’s Code of Conduct and Guide to Ethical Business Behavior 2010 is administered by the Chief Compliance Officer of CMS Energy, who reports directly to the Audit Committee of the Board of Directors of CMS Energy. Any amendment to, or waiver of, a provision of CMS Energy’s code of ethics that applies to CMS Energy’s CEO, CFO, CAO or persons performing similar functions will be disclosed on CMS Energy’s website at www.cmsenergy.com under “Compliance and Ethics.”

CMS Energy has also adopted a code of conduct that applies to its directors, entitled “Board of Directors Code of Conduct”. This Board of Directors Code of Conduct can also be found on CMS Energy’s website at www.cmsenergy.com. CMS Energy’s Board of Directors Code of Conduct is administered by the Audit Committee of the Board of Directors of CMS Energy. Any alleged violation of this Board of Directors Code of Conduct by a director will be investigated by disinterested members of the Audit Committee of the Board of Directors of CMS Energy, or if none, by disinterested members of the entire Board of Directors of CMS Energy.

## Consumers

Information that is required in Item 10 regarding executive officers is included in the Item 1. Business, Consumers Executive Officers section, which is incorporated by reference herein.

Information that is required in Item 10 regarding Consumers’ directors, executive officers, and corporate governance is included in CMS Energy’s definitive proxy statement, which is incorporated by reference herein.

## CODE OF ETHICS

Consumers adopted a code of ethics that applies to its CEO, CFO and CAO, as well as all other officers and employees of Consumers and its affiliates. This code of ethics, entitled “Code of Conduct and Guide to Ethical Business Behavior 2010” is posted on Consumers’ website at www.consumersenergy.com, under “Compliance and Ethics”. Consumers’ Code of Conduct and Guide to Ethical Business Behavior 2010 is administered by the Chief Compliance Officer of Consumers, who reports directly to the Audit Committee of the Board of Directors of Consumers. Any amendment to, or waiver of, a provision of Consumers’ code of ethics that applies to Consumers’ CEO, CFO, CAO or persons performing similar functions will be disclosed on Consumers’ website at www.consumersenergy.com under “Compliance and Ethics.”

Consumers has also adopted a code of conduct that applies to its directors, entitled “Board of Directors Code of Conduct”. This Board of Directors Code of Conduct can also be found on Consumers’ website at www.consumersenergy.com. The Consumers’ Board of Directors Code of Conduct is administered by the Audit Committee of the Board of Directors of Consumers. Any alleged violation of this Board of Directors Code of Conduct by a director will be investigated by disinterested members of the Audit Committee of the Board of Directors of Consumers, or if none, by disinterested members of the entire Board of Directors of Consumers.



## ITEM 11. EXECUTIVE COMPENSATION

Information that is required in Item 11 regarding executive compensation of CMS Energy’s and Consumers’ executive officers is included in CMS Energy’s definitive proxy statement, which is incorporated by reference herein.

## ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

## CMS Energy

Information that is required in Item 12 regarding securities authorized for issuance under equity compensation plans and security ownership of certain beneficial owners and management is included in CMS Energy’s definitive proxy statement, which is incorporated by reference herein.

## Consumers

Information that is required in Item 12 regarding securities authorized for issuance under equity compensation plans and security ownership of certain beneficial owners and management of Consumers is included in CMS Energy’s definitive proxy statement, which is incorporated by reference herein.

## ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

## CMS Energy

Information that is required in Item 13 regarding certain relationships and related transactions, and director independence is included in CMS Energy’s definitive proxy statement, which is incorporated by reference herein.

## Consumers

Information that is required in Item 13 regarding certain relationships and related transactions, and director independence regarding Consumers is included in CMS Energy’s definitive proxy statement, which is incorporated by reference herein.

## ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

## CMS Energy

Information that is required in Item 14 regarding principal accountant fees and services is included in CMS Energy’s definitive proxy statement, which is incorporated by reference herein.

## Consumers

Information that is required in Item 14 regarding principal accountant fees and services relating to Consumers is included in CMS Energy’s definitive proxy statement, which is incorporated by reference herein.

## PART IV

## ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a)(1) Financial Statements and Reports of Independent Public Accountants for CMS Energy and Consumers are included in each company’s Item 8. Financial Statements and Supplementary Data and are incorporated by reference herein.

(a)(2) Index to Financial Statement Schedules.



Schedule I Condensed Financial Information of Registrant CMS Energy-Parent Company
Condensed Statements of Income ..... 184
Statements of Cash Flows ..... 185
Condensed Balance Sheets ..... 186
Notes to Condensed Financial Statements ..... 188
Schedule II Valuation and Qualifying Accounts and Reserves
CMS Energy ..... 189
Consumers ..... 189
Report of Independent Registered Public Accounting Firm
CMS Energy ..... 172
Consumers ..... 173

Schedules other than those listed above are omitted because they are either not required, not applicable, or the required information is shown in the financial statements or notes thereto. Columns omitted from schedules filed have been omitted because the information is not applicable.

(a)(3) Exhibits for CMS Energy and Consumers are listed after Item 15(b) below and are incorporated by reference herein.

(b) Exhibits, including those incorporated by reference.



The agreements included as exhibits to this Form 10-K filing are included solely to provide information regarding the terms of the agreements and are not intended to provide any other factual or disclosure information about CMS Energy, Consumers, or other parties to the agreements. The agreements may contain representations and warranties made by each of the parties to each of the agreements that were made exclusively for the benefit of the parties involved in each of the agreements and should not be treated as statements of fact. The representations and warranties were made as a way to allocate risk if one or more of those statements prove to be incorrect. The statements were qualified by disclosures to the parties to each of the agreements and may not be reflected in each of the agreements. The agreements may apply standards of materiality that are different than standards applied to other investors. Additionally, the statements were made as of the date of the agreements or as specified in the agreements and have not been updated.

The representations and warranties may not describe the actual state of affairs of the parties to each agreement. Additional information about CMS Energy and Consumers may be found in this filing at www.cmsenergy.com, at www.consumersenergy.com, and through the SEC’s website at www.sec.gov.

<table><tr><td rowspan="2">Exhibits</td><td colspan="2">Previously Filed</td><td rowspan="2">Description</td></tr><tr><td>With File Number</td><td>As Exhibit Number</td></tr><tr><td>3.1</td><td>1-9513</td><td>(3)(a)*</td><td>— Restated Articles of Incorporation of CMS Energy effective June 1, 2004, as amended May 22, 2009 (2nd qtr. 2009 Form 10-Q)</td></tr><tr><td>3.2</td><td>1-9513</td><td>3.1*</td><td>— CMS Energy Corporation Bylaws, amended and restated as of January 27, 2011 (Form 8-K filed February 1, 2011)</td></tr><tr><td>3.3</td><td>1-5611</td><td>3(c)</td><td>— Restated Articles of Incorporation of Consumers effective June 7, 2000 (2000 Form 10-K)</td></tr><tr><td>3.4</td><td>1-5611</td><td>3.2</td><td>— Consumers Energy Company Bylaws, amended and restated as of January 27, 2011 (Form 8-K filed February 1, 2011)</td></tr><tr><td>4.1</td><td>2-65973</td><td>(b)(1)-4</td><td>— Indenture dated as of September 1, 1945 between Consumers and Chemical Bank (successor to Manufacturers Hanover Trust Company), as Trustee, including therein indentures supplemental thereto through the Forty-third Supplemental Indenture dated as of May 1, 1979 (Form S-16 filed November 13, 1979)</td></tr><tr><td>4.1.a</td><td>1-5611</td><td>(4)(a)</td><td>— 71st dated Supplemental thereto:</td></tr><tr><td>4.1.b</td><td>1-5611</td><td>(4)(d)</td><td>— 90th dated as of 3/06/98 (1997 Form 10-K)</td></tr><tr><td>4.1.c</td><td>1-5611</td><td>(4)(b)</td><td>— 92nd dated as of 4/30/03 (1st qtr. 2003 Form 10-Q)</td></tr><tr><td>4.1.d</td><td>1-5611</td><td>(4)(a)</td><td>— 96th dated as of 8/26/03 (3rd qtr. 2003 Form 10-Q)</td></tr><tr><td>4.1.e</td><td>1-5611</td><td>4.4</td><td>— 98th dated as of 12/13/04 (Form 8-K filed December 13, 2004)</td></tr><tr><td>4.1.f</td><td>1-5611</td><td>(4)(a)(i)</td><td>— 99th dated as of 1/20/05 (2004 Form 10-K)</td></tr><tr><td>4.1.g</td><td>1-5611</td><td>4.2</td><td>— 100th dated as of 3/24/05 (Form 8-K filed March 30, 2005)</td></tr><tr><td>4.1.h</td><td>1-5611</td><td>4.2</td><td>— 104th dated as of 8/11/05 (Form 8-K filed August 11, 2005)</td></tr><tr><td>4.1.i</td><td>1-5611</td><td>4(b)</td><td>— 105th dated as of 3/30/07 (2007 Form 10-K)</td></tr><tr><td>4.1.j</td><td>1-5611</td><td>4(a)</td><td>— 106th dated as of 11/30/07 (2007 Form 10-K)</td></tr><tr><td>4.1.k</td><td>1-5611</td><td>4.1</td><td>— 108th dated as of 3/14/08 (Form 8-K filed March 14, 2008)</td></tr><tr><td>4.1.l</td><td>1-5611</td><td>4.1</td><td>— 109th dated as of 9/11/08 (Form 8-K filed September 16, 2008)</td></tr><tr><td>4.1.m</td><td>1-5611</td><td>4.1</td><td>— 110th dated as of 9/12/08 (Form 8-K filed September 12, 2008)</td></tr><tr><td>4.1.n</td><td>1-5611</td><td>4.1</td><td>— 111th dated as of 3/6/09 (Form 8-K filed March 6, 2009)</td></tr><tr><td>4.1.o</td><td>1-5611</td><td>4.1</td><td>— 112th dated as of 9/1/10 (Form 8-K filed September 7, 2010)</td></tr><tr><td>4.1.p</td><td>1-5611</td><td>4.1</td><td>— 113th dated as of 10/15/10 (Form 8-K filed October 20, 2010)</td></tr><tr><td>4.2</td><td>1-5611</td><td>(4)(b)</td><td>— Indenture dated as of January 1, 1996 between Consumers and The Bank of New York Mellon, as Trustee (1995 Form 10-K)</td></tr><tr><td>4.3</td><td>1-5611</td><td>(4)(c)</td><td>— Indenture dated as of February 1, 1998 between Consumers and The Bank of New York Mellon (formerly The Chase Manhattan Bank), as Trustee (1997 Form 10-K)</td></tr></table>



<table><tr><td rowspan="2">Exhibits</td><td colspan="2">Previously Filed</td><td rowspan="2">Description</td></tr><tr><td>With File Number</td><td>As Exhibit Number</td></tr><tr><td>4.4</td><td>33-47629</td><td>(4)(a)*</td><td>— Indenture dated as of September 15, 1992 between CMS Energy and NBD Bank, as Trustee (Form S-3 filed May 1, 1992) Indentures Supplemental thereto:</td></tr><tr><td>4.4.a</td><td>333-58686</td><td>(4)(a)*</td><td>— 11th dated as of 3/29/01 (Form S-8 filed April 11, 2001)</td></tr><tr><td>4.4.b</td><td>1-9513</td><td>(4)(d)(ii)*</td><td>— 16th dated as of 12/16/04 (2004 Form 10-K)</td></tr><tr><td>4.4.c</td><td>1-9513</td><td>4.2*</td><td>— 17th dated as of 12/13/04 (Form 8-K filed December 13, 2004)</td></tr><tr><td>4.4.d</td><td>1-9513</td><td>4.2*</td><td>— 18th dated as of 1/19/05 (Form 8-K filed January 20, 2005)</td></tr><tr><td>4.4.e</td><td>1-9513</td><td>4.2*</td><td>— 19th dated as of 12/13/05 (Form 8-K filed December 15, 2005)</td></tr><tr><td>4.4.f</td><td>1-9513</td><td>4.2*</td><td>— 20th dated as of 7/3/07 (Form 8-K filed July 5, 2007)</td></tr><tr><td>4.4.g</td><td>1-9513</td><td>4.3*</td><td>— 21st dated as of 7/3/07 (Form 8-K filed July 5, 2007)</td></tr><tr><td>4.4.h</td><td>1-9513</td><td>4.1*</td><td>— 22nd dated as of 6/15/09 (Form 8-K filed June 15, 2009)</td></tr><tr><td>4.4.i</td><td>1-9513</td><td>4.3*</td><td>— 23rd dated as of 6/15/09 (Form 8-K filed June 15, 2009)</td></tr><tr><td>4.4.j</td><td>1-9513</td><td>4.1*</td><td>— 24th dated as of 1/14/10 (Form 8-K filed January 14, 2010)</td></tr><tr><td>4.4.k</td><td>1-9513</td><td>4.1*</td><td>— 25th dated as of 9/23/10 (Form 8-K filed September 23, 2010)</td></tr><tr><td>4.4.l</td><td>1-9513</td><td>4.1*</td><td>— 26th dated as of 11/19/10 (Form 8-K filed November 19, 2010)</td></tr><tr><td>4.5</td><td>1-9513</td><td>(4a)*</td><td>— Indenture dated as of June 1, 1997 between CMS Energy and The Bank of New York Mellon, as Trustee (Form 8-K filed July 1, 1997)</td></tr><tr><td>4.5.a</td><td>1-9513</td><td>(4)(b)*</td><td>— 1st dated as of 6/20/97 (Form 8-K filed July 1, 1997)</td></tr><tr><td>10.1</td><td>1-9513</td><td>(10)(d)*</td><td>— $300 million Seventh Amended and Restated Credit Agreement dated as of April 2, 2007 among CMS Energy Corporation, the Banks, the Administrative Agent, Collateral Agent, Syndication Agent and Documentation Agents, all defined therein and Amendment No. 1 dated as of December 19, 2007 (3rd qtr. 2009 Form 10-Q)</td></tr><tr><td>10.2</td><td>1-9513</td><td>(10)(b)*</td><td>— Amendment No. 2 dated as of January 23, 2009 to the $300 million Seventh Amended and Restated Credit Agreement (2008 Form 10-K)</td></tr><tr><td>10.3</td><td>1-9513</td><td>(10)(e)*</td><td>— Assumption and Acceptance dated January 8, 2008 to the $300 million Seventh Amended and Restated Credit Agreement (3rd qtr. 2009 Form 10-Q)</td></tr><tr><td>10.4</td><td>1-9513</td><td>10(b)*</td><td>— Fourth Amended and Restated Pledge and Security Agreement dated as of April 2, 2007 among CMS Energy and Collateral Agent, as defined therein (2007 Form 10-K)</td></tr><tr><td>10.5</td><td>1-9513</td><td>10(c)*</td><td>— Amended and Restated Cash Collateral Agreement dated as of April 2, 2007, made by CMS Energy to the Administrative Agent for the lenders and Collateral Agent, as defined therein (2007 Form 10-K)</td></tr><tr><td>10.6</td><td>1-5611</td><td>(10)(f)</td><td>— $500 million Fourth Amended and Restated Credit Agreement dated as of March 30, 2007 among Consumers Energy Company, the Banks, the Administrative Agent, the Collateral Agent, the Syndication Agent and the Documentation Agents, all as defined therein (3rd qtr. 2009 Form 10-Q)</td></tr><tr><td>10.7</td><td>1-9513</td><td>(10)(g)</td><td>— 2004 Form of Executive Severance Agreement (3rd qtr. 2009 Form 10-Q)</td></tr><tr><td>10.8</td><td>1-9513</td><td>(10)(h)</td><td>— 2004 Form of Officer Severance Agreement (3rd qtr. 2009 Form 10-Q)</td></tr><tr><td>10.9</td><td>1-9513</td><td>(10)(g)</td><td>— 2004 Form of Change-in-Control Agreement (2007 Form 10-K)</td></tr><tr><td>10.10</td><td>1-9513</td><td>10.1</td><td>— CMS Energy&#x27;s Performance Incentive Stock Plan, effective February 3, 1988, amended and restated effective August 1, 2010 (2nd qtr. 2010 Form 10-Q)</td></tr></table>



<table><tr><td rowspan="2">Exhibits</td><td colspan="2">Previously Filed</td><td rowspan="2">Description</td></tr><tr><td>With File Number</td><td>As Exhibit Number</td></tr><tr><td>10.11</td><td>1-9513</td><td>(10)(i)</td><td>— CMS Deferred Salary Savings Plan effective December 1, 1989 and as further amended effective December 1, 2007 (2007 Form 10-K)</td></tr><tr><td>10.12</td><td>1-9513</td><td>(10)(l)</td><td>— Amendment to the Deferred Salary Savings Plan dated December 21, 2008 (2008 Form 10-K)</td></tr><tr><td>10.13</td><td>1-9513</td><td>(10)(k)</td><td>— Supplemental Executive Retirement Plan for Employees of CMS Energy/Consumers Energy Company effective January 1, 1982 and as further amended effective December 1, 2007 (2007 Form 10-K)</td></tr><tr><td>10.14</td><td>1-9513</td><td>(10)(p)</td><td>— Amendment to the Defined Benefit Supplemental Executive Retirement Plan dated December 21, 2008 (2008 Form 10-K)</td></tr><tr><td>10.15</td><td>1-9513</td><td>(10)(l)</td><td>— Defined Contribution Supplemental Executive Retirement Plan effective April 1, 2006 and as further amended effective December 1, 2007 (2007 Form 10-K)</td></tr><tr><td>10.16</td><td>1-9513</td><td>(10)(r)</td><td>— Amendment to the Defined Contribution Supplemental Executive Retirement Plan dated December 21, 2008 (2008 Form 10-K)</td></tr><tr><td>10.17</td><td>1-9513</td><td>(10)(t)</td><td>— 2009 Form of Officer Separation Agreement (2008 Form 10-K)</td></tr><tr><td>10.18</td><td>1-9513</td><td>(10)(v)</td><td>— Amended and Restated Investor Partner Tax Indemnification Agreement dated as of June 1, 1990 among Investor Partners, CMS Midland as Indemnitor and CMS Energy as Guarantor (1990 Form 10-K)</td></tr><tr><td>10.19</td><td>1-9513</td><td>(10)(y)*</td><td>— Environmental Agreement dated as of June 1, 1990 made by CMS Energy to The Connecticut National Bank and Others (1990 Form 10-K)</td></tr><tr><td>10.20</td><td>1-5611</td><td>(10)(y)</td><td>— Unwind Agreement dated as of December 10, 1991 by and among CMS Energy, Midland Group, Ltd., Consumers, CMS Midland, Inc., MEC Development Corp. and CMS Midland Holdings Company (1991 Form 10-K)</td></tr><tr><td>10.21</td><td>1-5611</td><td>(10)(aa)*</td><td>— Parent Guaranty dated as of June 14, 1990 from CMS Energy to MCV, each of the Owner Trustees, the Indenture Trustees, the Owner Participants and the Initial Purchasers of Senior Bonds in the MCV Sale Leaseback transaction, and MEC Development (1991 Form 10-K)</td></tr><tr><td>10.22</td><td>1-5611</td><td>(10)(i)</td><td>— Asset Sale Agreement dated as of July 11, 2006 by and among Consumers Energy Company as Seller and Entergy Nuclear Palisades, LLC as Buyer (3rd qtr. 2009 Form 10-Q)</td></tr><tr><td>10.23</td><td>1-5611</td><td>(10)(j)</td><td>— Palisades Nuclear Power Plant Power Purchase Agreement dated as of July 11, 2006 between Entergy Nuclear Palisades, LLC and Consumers Energy Company (3rd qtr. 2009 Form 10-Q)</td></tr><tr><td>10.24</td><td>1-9513</td><td>(10)(k)*</td><td>— Agreement of Purchase and Sale by and between CMS Enterprises Company and Abu Dhabi National Energy Company PJSC dated as of February 3, 2007 (3rd qtr. 2009 Form 10-Q)</td></tr><tr><td>10.25</td><td>1-9513</td><td>10.1*</td><td>— Common Agreement dated March 12, 2007 between CMS Enterprises Company and Lucid Energy, LLC (Form 8-K filed March 14, 2007)</td></tr><tr><td>10.26</td><td>1-9513</td><td>(10)(l)*</td><td>— Agreement of Purchase and Sale dated March 12, 2007 by and among CMS Enterprises Company, CMS Energy Investment, LLC, and Lucid Energy, LLC, and Michigan Pipeline and Processing, LLC (3rd qtr. 2009 Form 10-Q)</td></tr></table>



<table><tr><td rowspan="2">Exhibits</td><td colspan="2">Previously Filed</td><td rowspan="2">Description</td></tr><tr><td>With File Number</td><td>As Exhibit Number</td></tr><tr><td>10.27</td><td>1-9513</td><td>(10)(m)*</td><td>Agreement of Purchase and Sale dated March 12, 2007 by and among CMS Enterprises Company, CMS Generation Holdings Company, CMS International Ventures, LLC, and Lucid Energy, LLC, and New Argentine Generation Company, LLC (3rd qtr. 2009 Form 10-Q)</td></tr><tr><td>10.28</td><td>1-9513</td><td>(10)(a)*</td><td>Form of Indemnification Agreement between CMS Energy Corporation and its Directors effective as of November 1, 2007 (3rd qtr. 2007 Form 10-Q)</td></tr><tr><td>10.29</td><td>1-5611</td><td>(10)(b)</td><td>Form of Indemnification Agreement between Consumers Energy Company and its Directors effective as of November 1, 2007 (3rd qtr. 2007 Form 10-Q)</td></tr><tr><td>10.30</td><td>1-5611</td><td>10.3</td><td>Amended and Restated Letter of Credit Reimbursement Agreement between Consumers and U.S. Bank National Association dated as of September 21, 2010 (3rd qtr. 2010 Form 10-Q)</td></tr><tr><td>10.31</td><td>1-5611</td><td>10.1</td><td>$150,000,000 Second Amended and Restated Revolving Credit Agreement dated as of August 11, 2010 among Consumers Energy Company, the Banks, Agent, Co-Syndication Agents and Documentation Agent, all as defined therein (Form 8-K filed August 16, 2010)</td></tr><tr><td>10.32</td><td>1-5611</td><td>(10)(t)</td><td>Settlement Agreement and Amended and Restated Power Purchase Agreement between Consumers Energy Company and Midland Cogeneration Venture Limited Partnership dated as of June 9, 2008 (3rd qtr. 2009 Form 10-Q)</td></tr><tr><td>10.33</td><td>1-5611</td><td>10.4</td><td>1st Amendment to the Amended and Restated Power Purchase Agreement between Consumers and MCV Partnership dated as of March 1, 2010 (3rd qtr. 2010 Form 10-Q)</td></tr><tr><td>10.34</td><td></td><td></td><td>Amended and Restated Receivables Purchase Agreement dated as of November 23, 2010 among Consumers Receivables Funding II, LLC, Consumers Energy Company, The Conduits from time to time party thereto, The Financial Institutions from time to time party thereto, The Managing Agents from time to time party thereto, and JPMorgan Chase Bank, NA, as Administrative Agent</td></tr><tr><td>10.35</td><td>1-5611</td><td>(10)(v)</td><td>Receivables Sale Agreement dated as of May 22, 2003 between Consumers Energy Company as Originator and Consumers Receivables Funding II, LLC as Buyer, as amended by Amendment No. 1 dated as of May 20, 2004 and as amended by Amendment No. 2 dated as of August 15, 2006 (3rd qtr. 2009 Form 10-Q)</td></tr><tr><td>10.36</td><td>1-5611</td><td>(10)(rr)</td><td>Amendment No. 3 to the Receivables Sale Agreement dated as of September 3, 2009 (2009 Form 10-K)</td></tr><tr><td>10.37</td><td>1-5611</td><td>(10)(ss)</td><td>Amendment No. 4 to the Receivables Sale Agreement dated as of February 12, 2010 (2009 Form 10-K)</td></tr><tr><td>10.38</td><td>1-5611</td><td>(10)(b)</td><td>Amendment No. 5 to the Receivables Sale Agreement dated as of March 17, 2010 (1st qtr. 2010 Form 10-Q)</td></tr><tr><td>10.39</td><td>1-5611</td><td>(10)(d)</td><td>Amendment No. 6 to the Receivables Sale Agreement dated as of April 20, 2010 (1st qtr. 2010 Form 10-Q)</td></tr><tr><td>10.40</td><td></td><td></td><td>Amendment No. 7 to the Receivables Sale Agreement dated as of November 23, 2010</td></tr><tr><td>10.41</td><td>1-9513</td><td>(10)(e)</td><td>CMS Incentive Compensation Plan for CMS Energy and its Subsidiaries effective January 1, 2004, amended and restated effective as of January 1, 2010 (1st qtr. 2010 Form 10-Q)</td></tr></table>



<table><tr><td rowspan="2">Exhibits</td><td colspan="2">Previously Filed</td><td rowspan="2">Description</td></tr><tr><td>With File Number</td><td>As Exhibit Number</td></tr><tr><td>10.42</td><td>1-9513</td><td>(10)(f)</td><td>— Form of Change in Control Agreement as of March 2010 (1st qtr. 2010 Form 10-Q)</td></tr><tr><td>10.43</td><td>1-9513</td><td>(10)(g)*</td><td>— Agreement between David W. Joos and CMS Energy Board of Directors (1st qtr. 2010 Form 10-Q)</td></tr><tr><td>10.44</td><td>1-5611</td><td>(10)(h)</td><td>— Bond Purchase Agreement between Consumers and each of the Purchasers named therein dated as of April 19, 2010 (1st qtr. 2010 Form 10-Q)</td></tr><tr><td>10.45</td><td>1-5611</td><td>10.1</td><td>— Bond Purchase Agreement between Consumers and each of the Purchasers named therein dated as of September 27, 2010 (Form 8-K filed September 30, 2010)</td></tr><tr><td>12.1</td><td></td><td></td><td>— Statement regarding computation of CMS Energy’s Ratios of Earnings to Fixed Charges and Combined Fixed Charges and Preferred Dividends</td></tr><tr><td>12.2</td><td></td><td></td><td>— Statement regarding computation of Consumers’ Ratios of Earnings to Fixed Charges and Combined Fixed Charges and Preferred Dividends</td></tr><tr><td>21.1</td><td></td><td></td><td>— Subsidiaries of CMS Energy and Consumers</td></tr><tr><td>23.1</td><td></td><td></td><td>— Consent of PricewaterhouseCoopers LLP for CMS Energy</td></tr><tr><td>23.2</td><td></td><td></td><td>— Consent of PricewaterhouseCoopers LLP for Consumers</td></tr><tr><td>24.1</td><td></td><td></td><td>— Power of Attorney for CMS Energy</td></tr><tr><td>24.2</td><td></td><td></td><td>— Power of Attorney for Consumers</td></tr><tr><td>31.1</td><td></td><td></td><td>— CMS Energy’s certification of the CEO pursuant to Section 302 of the Sarbanes-Oxley Act of 2002</td></tr><tr><td>31.2</td><td></td><td></td><td>— CMS Energy’s certification of the CFO pursuant to Section 302 of the Sarbanes-Oxley Act of 2002</td></tr><tr><td>31.3</td><td></td><td></td><td>— Consumers’ certification of the CEO pursuant to Section 302 of the Sarbanes-Oxley Act of 2002</td></tr><tr><td>31.4</td><td></td><td></td><td>— Consumers’ certification of the CFO pursuant to Section 302 of the Sarbanes-Oxley Act of 2002</td></tr><tr><td>32.1</td><td></td><td></td><td>— CMS Energy’s certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002</td></tr><tr><td>32.2</td><td></td><td></td><td>— Consumers’ certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002</td></tr><tr><td>99.1</td><td></td><td></td><td>— CMS Energy Corporation Stock Purchase Plan, amended and restated as of December 1, 2010</td></tr><tr><td>101.INS**</td><td></td><td></td><td>— XBRL Instance Document</td></tr><tr><td>101.SCH**</td><td></td><td></td><td>— XBRL Taxonomy Extension Schema</td></tr><tr><td>101.CAL**</td><td></td><td></td><td>— XBRL Taxonomy Extension Calculation Linkbase</td></tr><tr><td>101.DEF**</td><td></td><td></td><td>— XBRL Taxonomy Extension Definition Linkbase</td></tr><tr><td>101.LAB**</td><td></td><td></td><td>— XBRL Taxonomy Extension Labels Linkbase</td></tr><tr><td>101.PRE**</td><td></td><td></td><td>— XBRL Taxonomy Extension Presentation Linkbase</td></tr></table>

* Obligations of CMS Energy or its subsidiaries, but not of Consumers.

** In accordance with Regulation S-T, the XBRL-related information in Exhibit 101 shall be deemed to be “furnished” and not “filed”. The financial information contained in the XBRL-related information is “unaudited” and “unreviewed.”

Exhibits listed above that have heretofore been filed with the SEC pursuant to various acts administered by the SEC, and which were designated as noted above, are hereby incorporated herein by reference and made a part hereof with the same effect as if filed herewith.



## CMS ENERGY CORPORATION
SCHEDULE I— CONDENSED FINANCIAL INFORMATION OF REGISTRANT
CMS Energy — Parent Company
Condensed Statements of Income

Years Ended December 31 2010 2009 2008
In Millions
Operating Expenses
Depreciation and amortization. $ — $ — $ 3
Other operating expense. 6 10 5
Total Operating Expenses. 6 10 8
Operating Loss (6) (10) (8)
Other Income
Equity earnings of subsidiaries 464 310 433
Interest income. 1 — 1
Other income (expense) (8) 12 (4)
Total Other Income 457 322 430
Interest Charges
Interest on long-term debt. 147 124 127
Interest on preferred securities — 8 14
Intercompany interest expense and other 4 8 48
Total Interest Charges 151 140 189
Income Before Income Taxes 300 172 233
Income Tax Benefit (50) (57) (62)
Income From Continuing Operations 350 229 295
Loss From Discontinued Operations (10) — —
Net Income 340 229 295
Preferred Dividends 8 11 11
Redemption Premium on Preferred Stock 8 — —
Net Income Available to Common Stockholders 324 218 284



## CMS ENERGY CORPORATION
SCHEDULE I—CONDENSED FINANCIAL INFORMATION OF REGISTRANT
CMS Energy — Parent Company
Condensed Statements of Cash Flows

<table><tr><td>Years Ended December 31</td><td>2010</td><td>2009 In Millions</td><td>2008</td></tr><tr><td>Cash Flows From Operating Activities</td><td></td><td></td><td></td></tr><tr><td>Net income</td><td>$ 340</td><td>$ 229</td><td>$ 295</td></tr><tr><td>Adjustments to reconcile net income to net cash provided by operating activities:</td><td></td><td></td><td></td></tr><tr><td>Equity earnings of subsidiaries</td><td>(464)</td><td>(310)</td><td>(433)</td></tr><tr><td>Dividends received from subsidiaries</td><td>358</td><td>340</td><td>1,247</td></tr><tr><td>Depreciation and amortization</td><td>—</td><td>—</td><td>3</td></tr><tr><td>Increase in accounts receivable</td><td>—</td><td>(2)</td><td>—</td></tr><tr><td>Increase (decrease) in accounts payable</td><td>(16)</td><td>16</td><td>(2)</td></tr><tr><td>Change in other assets and liabilities</td><td>117</td><td>7</td><td>(55)</td></tr><tr><td>Net cash provided by operating activities</td><td>335</td><td>280</td><td>1,055</td></tr><tr><td>Cash Flows From Investing Activities</td><td></td><td></td><td></td></tr><tr><td>Investment in subsidiaries</td><td>(250)</td><td>(100)</td><td>(22)</td></tr><tr><td>Net cash used in investing activities</td><td>(250)</td><td>(100)</td><td>(22)</td></tr><tr><td>Cash Flows From Financing Activities</td><td></td><td></td><td></td></tr><tr><td>Proceeds from bank loans and notes</td><td>800</td><td>718</td><td>665</td></tr><tr><td>Proceeds from issuance of common stock</td><td>8</td><td>9</td><td>9</td></tr><tr><td>Retirement of bank loans and notes</td><td>(396)</td><td>(788)</td><td>(570)</td></tr><tr><td>Payment of common stock dividends</td><td>(154)</td><td>(114)</td><td>(82)</td></tr><tr><td>Payment of preferred stock dividends</td><td>(8)</td><td>(11)</td><td>(11)</td></tr><tr><td>Redemption of preferred stock</td><td>(239)</td><td>(4)</td><td>(1)</td></tr><tr><td>Debt issuance costs and financing fees</td><td>(11)</td><td>(5)</td><td>—</td></tr><tr><td>Increase (decrease) in notes payable, net</td><td>(85)</td><td>15</td><td>(1,043)</td></tr><tr><td>Net cash used in financing activities</td><td>(85)</td><td>(180)</td><td>(1,033)</td></tr><tr><td>Net Change in Cash and Temporary Cash Investments</td><td>$ —</td><td>$ —</td><td>$ —</td></tr><tr><td>Cash and Temporary Cash Investments, Beginning of Period</td><td>$ —</td><td>$ —</td><td>$ —</td></tr><tr><td>Cash and Temporary Cash Investments, End of Period</td><td>$ —</td><td>$ —</td><td>$ —</td></tr></table>



## CMS ENERGY CORPORATION
SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT
CMS Energy — Parent Company
Condensed Balance Sheets

December 31 2010 2009
In Millions
Assets
Current Assets
Notes and accrued interest receivable ..... $ 1 $ 1
Accounts receivable, including intercompany and related parties ..... 5 6
Deferred income taxes ..... 13 7
Total current assets ..... 19 14
Plant, Property, and Equipment, at cost ..... 16 16
Less accumulated depreciation ..... (16) (15)
Total plant, property, and equipment ..... — 1
Non-current Assets
Deferred income taxes ..... 372 371
Investment in Subsidiaries ..... 4,942 4,591
Other investment — SERP ..... 19 17
Other ..... 26 46
Total non-current assets ..... 5,359 5,025
Total Assets ..... $5,378 $5,040



## CMS ENERGY CORPORATION
SCHEDULE I— CONDENSED FINANCIAL INFORMATION OF REGISTRANT
CMS ENERGY— PARENT COMPANY
Condensed Balance Sheets

December 31

2010 2009
In Millions

Liabilities and Equity
Current Liabilities
Current portion of long-term debt ..... $ 437 $ 207
Accounts and notes payable, including intercompany and related parties ..... 156 258
Accrued interest, including intercompany ..... 27 24
Accrued taxes ..... 81 13
Other ..... 5 5
Total current liabilities ..... 706 507

Non-Current Liabilities
Long-term debt
Senior notes ..... 1,848 1,673
Intercompany notes ..... 34 —
Related party ..... — 34
Unamortized discount ..... (28) (37)
Postretirement benefits ..... 23 22
Other non-current liabilities ..... 2 —
Total non-current liabilities ..... 1,879 1,692

Equity
Common stockholders' equity ..... 2,793 2,602
Nonredeemable preferred stock ..... — 239
Total equity ..... 2,793 2,841

Total Liabilities and Equity ..... $5,378 $5,040



# CMS ENERGY CORPORATION
SCHEDULE I—CONDENSED FINANCIAL INFORMATION OF REGISTRANT
CMS Energy — Parent Company
Notes to Condensed Financial Statements

## 1: Basis of Presentation

CMS Energy’s condensed financial statements have been prepared on a parent-only basis. In accordance with Rule 12-04 of Regulation S-X, these parent-only financial statements do not include all of the information and notes required by GAAP for annual financial statements and therefore, these parent-only financial statements and other information included should be read in conjunction with CMS Energy’s audited Consolidated Financial Statements contained within Part II, Item 8 of this Form 10-K for the year ended December 31, 2010.

## 2: Guaranty

CMS Energy has issued a guaranty on behalf of its wholly owned subsidiary, CMS ERM, to support its payment obligations to a third party under certain commodity purchase or swap agreements. CMS Energy’s maximum potential obligation under the guaranty is $5 million, plus expenses.



## CMS ENERGY CORPORATION

## SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

Years Ended December 31, 2010, 2009, and 2008

<table><tr><td>Description</td><td>Balance at Beginning of Period</td><td>Charged to Expense</td><td>Charged to Other Accounts (In Millions)</td><td>Deductions</td><td>Balance at End of Period</td></tr><tr><td>Allowance for uncollectible accounts(a)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>2010</td><td>$23</td><td>$53</td><td>$ —</td><td>$51</td><td>$25</td></tr><tr><td>2009</td><td>$26</td><td>$47</td><td>$ —</td><td>$50</td><td>$23</td></tr><tr><td>2008</td><td>$21</td><td>$47</td><td>$ —</td><td>$42</td><td>$26</td></tr><tr><td>Deferred tax valuation allowance</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>2010</td><td>$34</td><td>$ 1</td><td>$(15)</td><td>$ 1</td><td>$19</td></tr><tr><td>2009</td><td>$32</td><td>$ 2</td><td>$ —</td><td>$—</td><td>$34</td></tr><tr><td>2008</td><td>$32</td><td>$—</td><td>$ 7</td><td>$ 7</td><td>$32</td></tr><tr><td>Allowance for notes receivable(a)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>2010</td><td>$ 6</td><td>$ 4</td><td>$ —</td><td>$ 5</td><td>$ 5</td></tr><tr><td>2009</td><td>$34</td><td>$ 7</td><td>$ —</td><td>$35</td><td>$ 6</td></tr><tr><td>2008</td><td>$33</td><td>$ 4</td><td>$ —</td><td>$ 3</td><td>$34</td></tr></table>

(a) Deductions are write-offs of uncollectible accounts, net of recoveries.

## CONSUMERS ENERGY COMPANY

## SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

Years Ended December 31, 2010, 2009, and 2008

<table><tr><td>Description</td><td>Balance at Beginning of Period</td><td>Charged to Expense</td><td>Charged to Other Accounts (In Millions)</td><td>Deductions</td><td>Balance at End of Period</td></tr><tr><td>Allowance for uncollectible accounts(a)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>2010</td><td>$21</td><td>$53</td><td>$—</td><td>$51</td><td>$23</td></tr><tr><td>2009</td><td>$24</td><td>$47</td><td>$—</td><td>$50</td><td>$21</td></tr><tr><td>2008</td><td>$16</td><td>$47</td><td>$—</td><td>$39</td><td>$24</td></tr></table>

(a) Deductions are write-offs of uncollectible accounts, net of recoveries.



## SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, CMS Energy Corporation has duly caused this Annual Report to be signed on its behalf by the undersigned, thereunto duly authorized, on the 24th day of February 2011.

## CMS ENERGY CORPORATION

By /s/ John G. Russell

John G. Russell
President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this Annual Report has been signed below by the following persons on behalf of CMS Energy Corporation and in the capacities indicated and on the 24th day of February 2011.

Signature

Title

(i) Principal executive officer:

/s/ John G. Russell
John G. Russell

President and Chief Executive Officer

(ii) Principal financial officer:
/s/ THOMAS J. WEBB
Thomas J. Webb

Executive Vice President and
Chief Financial Officer

(iii) Controller or principal accounting officer:
/s/ GLENN P. BARBA
Glenn P. Barba

Vice President, Controller and Chief Accounting Officer

(iv) A majority of the Directors:
* *
Merribel S. Ayres
* *
Jon E. Barfield
* *
Stephen E. Ewing
* *
Richard M. Gabrys
* *
David W. Joos
* *
Philip R. Lochner, Jr.

Director

Director

Director

Director

Director

Director



<table><tr><td>Signature</td><td>Title</td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Michael T. Monahan</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>John G. Russell</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Kenneth L. Way</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>John B. Yasinsky</td><td></td></tr><tr><td>/s/ THOMAS J. WEBB</td><td></td></tr><tr><td>Thomas J. Webb, Attorney-in-Fact</td><td></td></tr></table>



## SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, Consumers Energy Company has duly caused this Annual Report to be signed on its behalf by the undersigned, thereunto duly authorized, on the 24th day of February 2011.

## CONSUMERS ENERGY COMPANY

By ___ /s/ John G. Russell

John G. Russell
President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this Annual Report has been signed below by the following persons on behalf of Consumers Energy Company and in the capacities indicated and on the 24th day of February 2011.

Signature

Title

(i) Principal executive officer:

/s/ JOHN G. RUSSELL
John G. Russell

President and Chief Executive Officer

(ii) Principal financial officer:

/s/ THOMAS J. WEBB
Thomas J. Webb

Executive Vice President and
Chief Financial Officer

(iii) Controller or principal accounting officer:

/s/ GLENN P. BARBA
Glenn P. Barba

Vice President, Controller and Chief Accounting Officer

(iv) A majority of the Directors:

* Director

Merribel S. Ayres

* Director

Jon E. Barfield

* Director

Stephen E. Ewing
* Director

Richard M. Gabrys

* Director

David W. Joos

* Director

Philip R. Lochner, Jr.



<table><tr><td>Signature</td><td>Title</td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Michael T. Monahan</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>John G. Russell</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Kenneth L. Way</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>John B. Yasinsky</td><td></td></tr><tr><td>/s/ THOMAS J. WEBB</td><td></td></tr><tr><td colspan="2">Thomas J. Webb, Attorney-in-Fact</td></tr></table>



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