109th Congress, 1st Session – – – – – – – – – – – – – – House Document 109-18

THE 2005 ANNUAL REPORT OF THE BOARD OF 

TRUSTEES OF THE FEDERAL OLD-AGE AND 

SURVIVORS INSURANCE AND DISABILITY 

INSURANCE TRUST FUNDS

COMMUNICATION

FROM

THE BOARD OF TRUSTEES, FEDERAL OLD-AGE

AND SURVIVORS INSURANCE AND DISABILITY 

INSURANCE TRUST FUNDS

TRANSMITTING

THE 2005 ANNUAL REPORT OF THE BOARD OF TRUSTEES OF THE

FEDERAL OLD-AGE AND SURVIVORS INSURANCE AND THE FEDERAL

DISABILITY INSURANCE TRUST FUNDS

April 5, 2005.—Referred to the Committee on Ways and Means

 and ordered to be printed

U.S. GOVERNMENT PRINTING OFFICE

20-372 WASHINGTON: 2005
.
LETTER OF TRANSMITTAL

BOARD OF TRUSTEES OF THE

FEDERAL OLD-AGE AND SURVIVORS INSURANCE

AND DISABILITY INSURANCE TRUST FUNDS,

Washington, D.C., March 23, 2005

The Honorable J. Dennis Hastert

Speaker of the House of Representatives

Washington, D.C.

The Honorable Richard B. Cheney

President of the Senate

Washington, D.C.

Gentlemen: 

We have the honor of transmitting to you the 2005 Annual Report of the Board of

Trustees of the Federal Old-Age and Survivors Insurance Trust Fund and the Federal Disability Insurance Trust Fund, the 65th such report.

Respectfully,
.
CONTENTS

(V)

I. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

II. OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

A. HIGHLIGHTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

B. TRUST FUND FINANCIAL OPERATIONS IN 2004 . . . . . . . 4

C. ASSUMPTIONS ABOUT THE FUTURE . . . . . . . . . . . . . . . . 6

D. PROJECTIONS OF FUTURE FINANCIAL STATUS . . . . . . . 7

E. CONCLUSION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

III. FINANCIAL OPERATIONS OF THE TRUST FUNDS AND

LEGISLATIVE CHANGES IN THE LAST YEAR . . . . . . . . . . 18

A. OPERATIONS OF THE OLD-AGE AND SURVIVORS 

INSURANCE (OASI) AND DISABILITY INSURANCE (DI) 

TRUST FUNDS, IN CALENDAR YEAR 2004 . . . . . . . . . . . . 18

1. OASI Trust Fund . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2. DI Trust Fund . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3. OASI and DI Trust Funds, Combined . . . . . . . . . . . . . . . . . . 24

B. SOCIAL SECURITY AMENDMENTS SINCE THE 

2004 REPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

IV. ACTUARIAL ESTIMATES. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

A. SHORT-RANGE ESTIMATES . . . . . . . . . . . . . . . . . . . . . . . . 29

1. Operations of the OASI Trust Fund. . . . . . . . . . . . . . . . . . . . 30

2. Operations of the DI Trust Fund . . . . . . . . . . . . . . . . . . . . . . 33

3. Operations of the Combined OASI and DI Trust Funds . . . . . 37

4. Factors Underlying Changes in 10-Year Trust Fund Ratio 

Estimates From the 2004 Report . . . . . . . . . . . . . . . . . . . . . . 38

B. LONG-RANGE ESTIMATES . . . . . . . . . . . . . . . . . . . . . . . . . 40

1. Annual Income Rates, Cost Rates, and Balances . . . . . . . . . . 41

2. Comparison of Workers to Beneficiaries . . . . . . . . . . . . . . . . 46

3. Trust Fund Ratios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4. Summarized Income Rates, Cost Rates, and Balances . . . . . . 53

5. Additional Measures of OASDI Unfunded Obligations . . . . . 57

6. Test of Long-Range Close Actuarial Balance . . . . . . . . . . . . 60

7. Reasons for Change in Actuarial Balance From Last Report . . 64
(VI)

V. ASSUMPTIONS AND METHODS UNDERLYING

ACTUARIAL ESTIMATES. . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

A. DEMOGRAPHIC ASSUMPTIONS AND METHODS . . . . . . . 70

1. Fertility Assumptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

2. Mortality Assumptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

3. Immigration Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . 73

4. Total Population Estimates. . . . . . . . . . . . . . . . . . . . . . . . . . 76

5. Life Expectancy Estimates . . . . . . . . . . . . . . . . . . . . . . . . . . 78

B. ECONOMIC ASSUMPTIONS AND METHODS . . . . . . . . . . . 82

1. Productivity Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . 82

2. Price Inflation Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . 83

3. Average Earnings Assumptions . . . . . . . . . . . . . . . . . . . . . . 84

4. Assumed Real-Wage Differentials . . . . . . . . . . . . . . . . . . . . 86

5. Labor Force and Unemployment Projections . . . . . . . . . . . . . 88

6. Gross Domestic Product Projections . . . . . . . . . . . . . . . . . . . 90

7. Interest Rate Projections . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

C. PROGRAM-SPECIFIC ASSUMPTIONS AND METHODS . . . 95

1. Automatically Adjusted Program Amounts . . . . . . . . . . . . . . 95

2. Covered Employment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

3. Taxable Payroll and Payroll Tax Revenue . . . . . . . . . . . . . . . 103

4. Insured Population. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

5. Old-Age and Survivors Insurance Beneficiaries. . . . . . . . . . . 106

6. Disability Insurance Beneficiaries. . . . . . . . . . . . . . . . . . . . . 112

7. Average Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

8. Benefit Payments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

9. Administrative Expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

10. Railroad Retirement Financial Interchange . . . . . . . . . . . . . . 120

11. Benefits to Uninsured Persons . . . . . . . . . . . . . . . . . . . . . . . 121

12. Military-Service Transfers . . . . . . . . . . . . . . . . . . . . . . . . . . 121

13. Income From Taxation of Benefits . . . . . . . . . . . . . . . . . . . . 121

VI. APPENDICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

A. HISTORY OF OASI AND DI TRUST FUND OPERATIONS. . 123

B. HISTORY OF ACTUARIAL BALANCE ESTIMATES . . . . . . 137

C. FISCAL YEAR HISTORICAL DATA AND PROJECTIONS 

THROUGH 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
(VII)

D. LONG-RANGE SENSITIVITY ANALYSIS . . . . . . . . . . . . . . 148

1. Total Fertility Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

2. Death Rates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

3. Net Immigration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

4. Real-Wage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

5. Consumer Price Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

6. Real Interest Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

7. Disability Incidence Rates . . . . . . . . . . . . . . . . . . . . . . . . . . 155

8. Disability Termination Rates . . . . . . . . . . . . . . . . . . . . . . . . 156

E. STOCHASTIC PROJECTIONS. . . . . . . . . . . . . . . . . . . . . . . . 158

1. Background. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

2. Methodology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

3. Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

F. ESTIMATES FOR OASDI AND HI, SEPARATE AND 

COMBINED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

1. Estimates as a Percentage of Taxable Payroll. . . . . . . . . . . . . 164

2. Estimates as a Percentage of Gross Domestic Product . . . . . . 169

3. Estimates in Dollars. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

G. ANALYSIS OF BENEFIT DISBURSEMENTS FROM THE 

OASI TRUST FUND WITH RESPECT TO DISABLED 

BENEFICIARIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

H. GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

LIST OF TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

LIST OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

INDEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

STATEMENT OF ACTUARIAL OPINION. . . . . . . . . . . . . . . 217
.
THE 2005 ANNUAL REPORT OF THE BOARD OF

TRUSTEES OF THE FEDERAL OLD-AGE AND

SURVIVORS INSURANCE AND DISABILITY

INSURANCE TRUST FUNDS

I. INTRODUCTION

The Old-Age, Survivors, and Disability Insurance (OASDI) program in the

United States provides protection against the loss of earnings due to retirement, death, or disability. The OASDI program consists of two separate parts

which pay monthly benefits to workers and their families—Old-Age and

Survivors Insurance (OASI) and Disability Insurance (DI). Under OASI,

monthly benefits are paid to retired workers and their families and to survivors of deceased workers. Under DI, monthly benefits are paid to disabled

workers and their families.

The Board of Trustees was established under the Social Security Act to oversee the financial operations of the OASI and DI Trust Funds. The Board is

composed of six members. Four members serve by virtue of their positions

in the Federal Government: the Secretary of the Treasury, who is the Managing Trustee; the Secretary of Labor; the Secretary of Health and Human Services; and the Commissioner of Social Security. The other two members are

appointed by the President and confirmed by the Senate to serve as public

representatives: John L. Palmer and Thomas R. Saving, the current public

Trustees, began serving their 4-year terms on October 28, 2000. They have

continued serving through the issuance of this report under the provision of

the Social Security Act that allows a public representative whose term has

expired to continue in the position until the earlier of the time at which a successor takes office or the Board’s next annual report. The Deputy Commissioner of the Social Security Administration (SSA) is designated as Secretary

of the Board.

The Social Security Act requires that the Board, among other duties, report

annually to the Congress on the financial and actuarial status of the OASI

and DI Trust Funds. This annual report, for 2005, is the 65th such report.
Overview

2

II. OVERVIEW

A. HIGHLIGHTS

The report’s major findings are summarized below.

In 2004

At the end of 2004, 48 million people were receiving benefits: 33 million

retired workers and their dependents, 7 million survivors of deceased workers, and 8 million disabled workers and their dependents. During the year an

estimated 157 million people had earnings covered by Social Security and

paid payroll taxes. Total benefits paid in 2004 were $493 billion. Income was

$658 billion, and assets held in special issue U.S. Treasury securities grew to

$1.7 trillion. 

Short-Range Results

The OASI and DI Trust Funds, individually and combined, are adequately

financed over the next 10 years under the intermediate assumptions. The

combined assets of the OASI and DI Trust Funds are projected to increase

from $1,687 billion at the beginning of 2005, or 320 percent of annual

expenditures, to $3,697 billion at the beginning of 2014, or 417 percent of

annual expenditures in that year. Combined assets were projected in last

year’s report to rise to 325 percent of annual expenditures at the beginning of

2005, and 446 percent at the beginning of 2014.

Long-Range Results

Under the intermediate assumptions, OASDI cost will increase rapidly

between about 2010 and 2030, due to the retirement of the large baby-boom

generation. After 2030, increases in life expectancy and relatively low fertility rates will continue to increase Social Security system costs, but more

slowly. Annual cost will exceed tax income starting in 2017 at which time

the annual gap will be covered with cash from redeeming special obligations

of the Treasury, until these assets are exhausted in 2041. Separately, the DI

fund is projected to be exhausted in 2027 and the OASI fund in 2043. For the

75-year projection period, the actuarial deficit is 1.92 percent of taxable payroll, 0.04 percentage point larger than in last year’s report. The open group

unfunded obligation for OASDI over the 75-year period is $4.0 trillion in

present value, $0.3 trillion more than the unfunded obligation estimated a

year ago. 
3

Highlights

The OASDI annual cost rate is projected to increase from 11.13 percent of

taxable payroll in 2005, to 16.74 percent in 2030, and to 19.08 percent in

2079, or to a level that is 5.70 percent of taxable payroll more than the projected income rate for 2079. Expressed in relation to the projected gross

domestic product (GDP), OASDI cost is estimated to rise from the current

level of 4.3 percent of GDP, to 6.1 percent in 2030, and to 6.4 percent in

2079. 

Conclusion

Annual cost will begin to exceed tax income in 2017 for the combined

OASDI Trust Funds, which are projected to become insolvent (i.e., unable to

pay scheduled benefits in full on a timely basis) when assets are exhausted in

2041 under the long-range intermediate assumptions. For the trust funds to

remain solvent throughout the 75-year projection period, the combined payroll tax rate could be increased during the period in a manner equivalent to

an immediate and permanent increase of 1.92 percentage points, benefits

could be reduced during the period in a manner equivalent to an immediate

and permanent reduction of 12.8 percent, general revenue transfers equivalent to $4.0 trillion (in present value) could be made during the period, or

some combination of approaches could be adopted. Significantly larger

changes would be required to maintain solvency beyond 75 years.

The projected trust fund deficits should be addressed in a timely way to

allow for a gradual phasing in of the necessary changes and to provide

advance notice to workers. The sooner adjustments are made the smaller and

less abrupt they will have to be. Social Security plays a critical role in the

lives of 48 million beneficiaries, and 159 million covered workers and their

families. With informed discussion, creative thinking, and timely legislative

action, we will ensure that Social Security continues to protect future generations.
Overview

4

B. TRUST FUND FINANCIAL OPERATIONS IN 2004

The table below shows the income, expenditures, and assets for the OASI,

the DI and the combined OASDI Trust Funds in calendar year 2004.

Note: Totals do not necessarily equal the sums of rounded components.

In 2004, net contributions accounted for 84 percent of total trust fund

income. Net contributions consist of taxes paid by employees, employers and

the self-employed on earnings covered by Social Security. These taxes were

paid on covered earnings up to a specified maximum annual amount, which

was $87,900 in 2004 and is increased each year automatically (to $90,000 in

2005) as the average wage increases. The tax rates scheduled under current

law for 2004 and later are shown in table II.B2.

Two percent of OASDI Trust Fund income came from subjecting up to

50 percent of Social Security benefits above a certain level to Federal personal income taxation, and 14 percent of OASDI income came from interest

earned on investment of OASDI Trust Fund reserves. Social Security’s assets

are invested in interest-bearing securities of the U.S. Government. In 2004

the combined trust fund assets earned interest at an effective annual rate of

Table II.B1.—Summary of 2004 Trust Fund Financial Operations

Amounts (in billions)

OASI DI OASDI

Assets at the end of 2003 . . . . . . . . . . . . . . . . . . . . . . $1,355.3 $175.4 $1,530.8

Total income in 2004 . . . . . . . . . . . . . . . . . . . . . . . . . 566.3 91.4 657.7

Net contributions . . . . . . . . . . . . . . . . . . . . . . . . . . 472.8 80.3 553.0

Taxation of benefits . . . . . . . . . . . . . . . . . . . . . . . . 14.6 1.1 15.7

Interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79.0 10.0 89.0

Total expenditures in 2004. . . . . . . . . . . . . . . . . . . . . 421.0 80.6 501.6

Benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . 415.0 78.2 493.3

Railroad Retirement financial interchange . . . . . . 3.6 .2 3.8

Administrative expenses . . . . . . . . . . . . . . . . . . . . 2.4 2.2 4.5

Net increase in assets in 2004 . . . . . . . . . . . . . . . . . . 145.3 10.8 156.1

Assets at the end of 2004 . . . . . . . . . . . . . . . . . . . . . . 1,500.6 186.2 1,686.8

Table II.B2.—Tax Rates for 2004 and Later

OASI DI OASDI

Tax rate for employees and employers, each (in percent) . . . . . . . 5.30 0.90 6.20

Tax rate for self-employed persons (in percent) . . . . . . . . . . . . . . 10.60 1.80 12.40
5

Calendar Year 2004 Operations

5.7 percent. More than 98 percent of expenditures from the combined

OASDI Trust Funds in 2004 went to pay retirement, survivor, and disability

benefits totaling $493.3 billion. The financial interchange with the Railroad

Retirement program resulted in a payment of $3.8 billion from the combined

OASDI Trust Funds, or about 0.8 percent of total expenditures. The administrative expenses of the Social Security program were $4.5 billion, or about

0.9 percent of total expenditures. 

Assets of the trust funds provide a reserve to pay benefits whenever expenditures exceed income. Assets increased by $156.1 billion in 2004 because

income to each fund exceeded expenditures. At the end of 2004, the combined assets of the OASI and the DI Trust Funds were 320 percent of estimated expenditures for 2005.
Overview

6

C. ASSUMPTIONS ABOUT THE FUTURE

The actual future income and expenditures of the OASI and DI Trust Funds

depend on many factors, including the size and characteristics of the population receiving benefits, the level of monthly benefit amounts, the size of the

work force, and the level of workers’ earnings. These factors will depend in

turn upon future birth rates, death rates, immigration, marriage and divorce

rates, retirement-age patterns, disability incidence and termination rates, productivity gains, wage increases, inflation, and many other demographic, economic, and program-specific factors.

The intermediate demographic and economic assumptions shown in table

II.C1, designated as alternative II, reflect the Trustees’ best estimates of

future experience, and therefore most of the figures in this overview depict

only the outcomes under the intermediate assumptions. Any projection of the

future is, of course, uncertain. For this reason, alternatives I (low cost) and

III (high cost) are included to provide a range of possible future experience.

The assumptions for these two alternatives are also shown in table II.C1, and

their implications are highlighted in a separate section on the uncertainty of

the projections.

Assumptions are reexamined each year in light of recent experience and new

information. This careful review and updating of the assumptions on an

annual basis helps ensure that they provide the Trustees’ best estimate of

future possibilities.

Table II.C1.—Ultimate1 Values of Key Demographic and Economic Assumptions

for the Long-Range (75-year) Projection Period

1 Ultimate values are assumed to be reached within 5 to 25 years. See chapter V for details.

Ultimate assumptions Intermediate Low Cost High Cost

Total fertility rate (children per woman) . . . . . . . . . . . 1.95 2.2 1.7

Average annual percentage reduction in total age-sexadjusted death rates from 2029 to 2079. . . . . . . . . . .71 .33 1.23

Annual net immigration (in thousands) . . . . . . . . . . . . 900 1,300 672.5

Annual percentage change in:

Productivity (total U.S. economy) . . . . . . . . . . . . . . 1.6 1.9 1.3

Average wage in covered employment. . . . . . . . . . . 3.9 3.4 4.4

Consumer Price Index (CPI). . . . . . . . . . . . . . . . . . . 2.8 1.8 3.8

Real-wage differential (percent). . . . . . . . . . . . . . . . . . 1.1 1.6 .6

Unemployment rate (percent). . . . . . . . . . . . . . . . . . . . 5.5 4.5 6.5

Annual trust fund interest rate (percent) . . . . . . . . . . . 5.8 5.5 6.0
7

Future Financial Status

D. PROJECTIONS OF FUTURE FINANCIAL STATUS

Short-Range Actuarial Estimates

For the short range (2005-2014), the Trustees measure trust fund adequacy

by comparing assets at the beginning of each year to projected program cost

for that year under the intermediate set of assumptions. Having a trust fund

ratio of 100 percent or more—that is, assets at the beginning of each year at

least equal to projected outgo during the year—is considered a good indication of a trust fund’s ability to cover most short-term contingencies. Both the

OASI and the DI trust fund ratios under the intermediate assumptions exceed

100 percent throughout the short-range period and therefore satisfy the Trustees’ short-term test for financial adequacy. Figure II.D1 below shows the

trust fund ratios for the combined OASI and DI Trust Funds for the next 10

years. 

Long-Range Actuarial Estimates

The financial status of the trust funds over the next 75 years is measured in

terms of cost and income as a percentage of taxable payroll, trust fund ratios,

the actuarial balance (also as a percentage of taxable payroll), and the open

group unfunded obligation (expressed in present-value dollars). Considering

 Figure II.D1.—Short-Range OASDI Trust Fund Ratios

[Assets as a percentage of annual expenditures]

0%

50%

100%

150%

200%

250%

300%

350%

400%

450%

500%

550%

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014

Calendar year

Historical Estimated

"Adequate" level for trust fund ratio
Overview

8

Social Security’s cost as a percentage of the total U.S. economic output

(gross domestic product or GDP) provides an additional perspective. 

The year-by-year relationship between income and cost rates shown in figure

II.D2 illustrates the expected pattern of cash flow for the OASDI program

over the full 75-year period. Under the intermediate assumptions, the OASDI

cost rate is projected to decline slightly during 2005 through 2007 and then

increase up to the current level within the next 3 years. It then begins to

increase rapidly and first exceeds the income rate in 2017, producing cashflow deficits thereafter. Despite these cash-flow deficits, beginning in 2017,

redemption of trust fund assets will allow continuation of full benefit payments on a timely basis until 2041, when the trust funds will become

exhausted. This redemption process will require a flow of cash from the

General Fund of the Treasury. Pressures on the Federal Budget will thus

emerge well before 2041. Even if a trust fund’s assets are exhausted, however, tax income will continue to flow into the fund. Present tax rates would

be sufficient to pay 74 percent of scheduled benefits after trust fund exhaustion in 2041 and 68 percent of scheduled benefits in 2079.

Social Security’s cost rate generally will continue rising rapidly through

about 2030 as the baby-boom generation reaches retirement age. Thereafter,

the cost rate is estimated to rise at a slower rate for about 15 years as the

 Figure II.D2.—OASDI Income and Cost Rates Under Intermediate Assumptions

[As a percentage of taxable payroll]

0%

5%

10%

15%

20%

25%

2000 2010 2020 2030 2040 2050 2060 2070 2080

Calendar year

Cost: Scheduled and 

payable benefits

Income

Payable benefits as percent

of scheduled benefits:

2005-40: 100%

2041: 74%

2079: 68%

Cost: Scheduled but

not payable benefits

Expenditures: Income = payable 

benefits starting in the year the 

trust funds are exhausted (2041)
9

Future Financial Status

baby boom ages and begins to decrease in size. Continued reductions in

death rates and relatively low birth rates will cause a significant upward shift

in the average age of the population and will push the cost rate to

19.1 percent of taxable payroll by 2079 under the intermediate assumptions.

In a pay-as-you-go system (with no trust fund assets or borrowing authority),

this 19.1-percent cost rate means the combination of the payroll tax (scheduled to total 12.4 percent) and proceeds from income taxes on benefits

(expected to be 1.0 percent of taxable payroll in 2079) would have to equal

19.1 percent of taxable payroll to pay all currently scheduled benefits. After

2079, the upward shift in the average age of the population is likely to continue and to increase the gap between OASDI costs and income.

The primary reason that the OASDI cost rate will increase rapidly between

2010 and 2030 is that, as the large baby-boom generation born in the years

1946 through 1964 retires, the number of beneficiaries will increase much

more rapidly than the number of workers. The estimated number of workers

per beneficiary is shown in figure II.D3. In 2004, there were about 3.3 workers for every OASDI beneficiary. The baby-boom generation will have

largely retired by 2030, and the projected ratio of workers to beneficiaries

will be only 2.2 at that time. Thereafter, the number of workers per beneficiary will slowly decline, and the OASDI cost rate will continue to increase.

 Figure II.D3.—Number of Covered Workers Per OASDI Beneficiary

0

1

2

3

4

1990 2000 2010 2020 2030 2040 2050 2060 2070 2080

Calendar year

Historical Estimated
Overview

10

The maximum projected trust fund ratios for the OASI, DI, and combined

funds appear in table II.D1. The year in which the maximum projected trust

fund ratio is attained and the year in which the assets are projected to be

exhausted are shown as well.

The actuarial balance is a measure of the program’s financial status for the

75-year valuation period as a whole. It is essentially the difference between

income and cost of the program expressed as a percentage of taxable payroll

over the valuation period. This single number summarizes the adequacy of

program financing for the period. When the actuarial balance is negative, the

actuarial deficit can be interpreted as the percentage that would have to be

added to the current law income rate in each of the next 75 years, or subtracted from the cost rate in each year, to bring the funds into actuarial balance. In this report, the actuarial balance under the intermediate assumptions

is a deficit of 1.92 percent of taxable payroll for the combined OASI and DI

Trust Funds. The actuarial deficit was 1.89 percent in the 2004 report and has

been in the range of 1.86 percent to 2.23 percent for the last ten reports. 

Another way to illustrate the financial shortfall of the OASDI system is to

examine the cumulative value of taxes less costs, in present value. Figure

II.D4 shows the present value of cumulative OASDI taxes less costs over the

next 75 years. The balance of the combined trust funds peaks at $2.4 trillion

in 2016 (in present value) and then turns downward. This cumulative amount

continues to be positive, indicating trust fund assets, or reserves, through

2040. However, after 2040 this cumulative amount becomes negative, indicating a net unfunded obligation. Through the end of 2079, the combined

funds have a present-value unfunded obligation of $4.0 trillion. This

unfunded obligation represents 1.8 percent of future taxable payroll and

0.6 percent of future GDP, through the end of the 75-year projection period.

Table II.D1.—Projected Maximum Trust Fund Ratios Attained and

Trust Fund Exhaustion Dates Under the Intermediate Assumptions

OASI DI OASDI

Maximum trust fund ratio (percent). . . . . . . . . . . . . . 469 215 418

Year attained. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2015 2005 2015

Year of trust fund exhaustion. . . . . . . . . . . . . . . . . . . 2043 2027 2041
11

Future Financial Status

Still another important way to look at Social Security’s future is to view its

cost as a share of U.S. economic output. Figure II.D5 shows that Social

Security’s cost as a percentage of GDP will grow from 4.3 percent in 2005 to

6.1 percent in 2030, and then gradually increase to 6.4 percent in 2079. However, Social Security’s scheduled tax income is projected to be about

4.8 percent of GDP in both 2005 and 2030, and then to decrease to

4.5 percent in 2079.

 Figure II.D4.—Cumulative OASDI Income Less Cost, Based on Present Law Tax Rates 

and Scheduled Benefits

[Present value as of January 1, 2005, in trillions]

-$5

-$4

-$3

-$2

-$1

$0

$1

$2

$3

2004 2019 2034 2049 2064 2079

Ending year of valuation period

Unfunded obligation

(negative)

Trust fund assets

(positive)

2041
Overview

12

Even a 75-year period is not long enough to provide a complete picture of

Social Security’s financial condition. Figures II.D4, II.D5, and II.D6 show

that the program’s financial condition continues to worsen at the end of the

period. Overemphasis on summary measures for a 75-year period can lead to

incorrect perceptions and to policy prescriptions that do not move toward a

sustainable system. Thus, careful consideration of the trends in annual deficits and unfunded obligations toward the end of the 75-year period is important. In order to provide a more complete description of Social Security’s

very long-run financial condition, this report also includes summary measures for a time period that extends to the infinite horizon. These calculations

show that extending the horizon beyond 75 years continues to increase the

unfunded obligation. Over the infinite horizon, the shortfall is $11.1 trillion

in present value, or 3.5 percent of future taxable payroll and 1.2 percent of

future GDP. These calculations of the shortfall indicate that much larger

changes would be required to achieve solvency over the infinite future as

compared to changes needed to balance 75-year period summary measures.

 Figure II.D5.—OASDI Cost and Scheduled Tax Revenue as a Percentage of GDP

0%

2%

4%

6%

8%

10%

1990 2000 2010 2020 2030 2040 2050 2060 2070 2080

Calendar year

Historical Estimated

Cost

Scheduled Tax Revenue
13

Future Financial Status

Changes From Last Year’s Report

The long-range OASDI actuarial deficit of 1.92 percent of taxable payroll for

this year’s report is slightly larger than the deficit of 1.89 percent of taxable

payroll shown in last year’s report under intermediate assumptions. On balance, the overall positive effect of changes in assumptions, methods, and

data does not offset the negative impact of changing the valuation period for

this measure. For a description of the specific changes identified in table

II.D2 below, see section IV.B.7 on page 64.

The open group unfunded obligation over the 75-year projection period, has

increased from $3.7 trillion (present discounted value as of January 1, 2004)

to $4.0 trillion (present discounted value as of January 1, 2005). Thus, the

negative impact of advancing the valuation date by 1 year and including the

additional year 2079 in the new valuation period, was the predominant effect

for this measure.

Note: Totals do not necessarily equal the sums of rounded components.

Figure II.D6 shows that this year’s projections of annual balances start at a

slightly lower level than those in last year’s report. Over the period 2015

through 2030, annual balances are similar between the two reports. After

2030, the annual shortfall of program income is somewhat smaller than projected last year. A number of data updates and changes in methods contribTable II.D2.—Reasons for Change in the 75-Year Actuarial Balance

Under Intermediate Assumptions

[As a percentage of taxable payroll]

Item OASI DI OASDI

Shown in last year's report:

Income rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.90 1.94 13.84

Cost rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.46 2.27 15.73

Actuarial balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.56 -.33 -1.89

Changes in actuarial balance due to changes in:

Legislation / Regulation . . . . . . . . . . . . . . . . . . . . . . . .00 .00 .00

Valuation period1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 In changing from the valuation period of last year’s report, which was 2004-78, to the valuation period of

this report, 2005-79, the relatively large negative annual balance for 2079 is included. This results in a larger

long-range actuarial deficit. The fund balance at the end of 2004, i.e., at the beginning of the projection

period, is included in the 75-year actuarial balance.

-.06 -.01 -.07

Demographic data and assumptions. . . . . . . . . . . . . . +.02 +.01 +.03

Economic data and assumptions. . . . . . . . . . . . . . . . . -.06 -.01 -.06

Disability data and assumptions. . . . . . . . . . . . . . . . . +.01 -.02 -.01

Projection methods and data. . . . . . . . . . . . . . . . . . . . +.04 +.03 +.07

Total change in actuarial balance . . . . . . . . . . . . . . . . . . -.04 .00 -.04

Shown in this report:

Actuarial balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.60 -.32 -1.92

Income rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.93 1.94 13.87

Cost rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.53 2.26 15.79
Overview

14

uted to this improvement. Section IV.B.7 on page 64 provides a detailed

presentation of these changes.

Uncertainty of the Projections

Significant uncertainty surrounds the intermediate assumptions. The Trustees

have traditionally used low cost (alternative I) and high cost (alternative III)

assumptions to indicate this uncertainty. Figure II.D7 shows the projected

trust fund ratios for the combined OASI and DI Trust Funds under the intermediate, low cost, and high cost assumptions. The low cost alternative is

characterized by assumptions that improve the financial condition of the trust

funds, including a higher fertility rate, slower improvement in mortality, a

higher real-wage differential, and lower unemployment. The high cost alternative, in contrast, features a lower fertility rate, more rapid declines in mortality, a lower real-wage differential, and higher unemployment.

 Figure II.D6.—OASDI Annual Balances: 2004 and 2005 Trustees Reports

[As a percentage of taxable payroll under the intermediate assumptions]

-8%

-6%

-4%

-2%

0%

2%

4%

2000 2010 2020 2030 2040 2050 2060 2070 2080

Calendar year

2004 Report

2005 Report
15

Future Financial Status

These three alternatives have traditionally been constructed to provide a reasonable range of possible future experience. However, these alternatives do

not address the probability that actual experience will be within or outside

the range. As an additional way of illustrating uncertainty, this report

includes estimates from a model of the trust funds that provides a probability

distribution of possible future outcomes (see appendix E). The results of this

model suggest that outcomes better than the traditional low cost alternative

and outcomes worse than the high cost alternative have very low probabilities of occurring.

 Figure II.D7.—Long-Range OASDI Trust Fund Ratios Under Alternative Assumptions

[Assets as a percentage of annual cost]

0%

100%

200%

300%

400%

500%

600%

700%

1990 2000 2010 2020 2030 2040 2050 2060 2070 2080

Calendar year

Historical Estimated

III

II

I
Overview

16

E. CONCLUSION

Under current law the cost of Social Security will soon begin to increase

faster than the program’s income, because of the aging of the baby-boom

generation, expected continuing low fertility, and increasing life expectancy.

Based on the Trustees’ best estimate, program cost will exceed tax revenues

starting in 2017 and throughout the remainder of the 75-year projection

period. Social Security’s combined trust funds are projected to allow full

payment of benefits until they become exhausted in 2041. At that time

annual tax income to the trust funds is projected to equal about 74 percent of

program costs. Separately, the OASI and DI funds are projected to have sufficient funds to pay full benefits on time until 2043 and 2027, respectively.

By 2079, however, annual tax income is projected to be only about twothirds as large as the annual cost of the OASDI program. 

Over the full 75-year projection period the actuarial deficit estimated for the

combined trust funds is 1.92 percent of taxable payroll—slightly higher than

the 1.89 percent deficit projected in last year’s report. This deficit indicates

that financial adequacy of the program for the next 75 years could be

restored if the Social Security payroll tax were immediately and permanently

increased from its current level of 12.4 percent (for employees and employers combined) to 14.32 percent. Alternatively, all current and future benefits

could be immediately reduced by about 13 percent. Other ways of reducing

the deficit include making transfers from general revenues or adopting some

combination of approaches.

If no action were taken until the combined trust funds become exhausted in

2041, much larger changes would be required. 

 • For example, payroll taxes could be raised to finance scheduled benefits

fully in every year starting in 2041. In this case, the payroll tax would

be increased to 16.66 percent at the point of trust fund exhaustion in

2041 and continue rising to 18.10 percent in 2079.

 • Similarly, benefits could be reduced to the level that is payable with

scheduled tax rates in every year beginning in 2041. Under this scenario, benefits would be reduced 26 percent at the point of trust fund

exhaustion in 2041, with reductions reaching 32 percent in 2079.

Either of these examples would eliminate annual deficits after trust fund

exhaustion. Because of the increasing average age of the population (due to

expected improvement in life expectancy), Social Security’s annual cost will

very likely continue to grow faster than scheduled tax revenues after 2079.
17

Conclusion

As a result, ensuring solvency of the system beyond 2079 would likely

require larger changes than those expected to be needed for 2079.

The projected trust fund deficits should be addressed in a timely way to

allow for a gradual phasing in of the necessary changes and to provide

advance notice to workers. The sooner adjustments are made the smaller and

less abrupt they will have to be. Social Security plays a critical role in the

lives of 48 million beneficiaries, and 159 million covered workers and their

families. With informed discussion, creative thinking, and timely legislative

action, we will ensure that Social Security continues to protect future generations. 

For further information related to the contents of this report, see the following websites. 

 • www.socialsecurity.gov/OACT/TR/TR05/index.html

 • www.cms.hhs.gov/publications/trusteesreport/

 • www.treas.gov/offices/economic-policy/social_security.html
Financial Operations & Legislative Changes

18

III. FINANCIAL OPERATIONS OF THE TRUST FUNDS AND

LEGISLATIVE CHANGES IN THE LAST YEAR

A. OPERATIONS OF THE OLD-AGE AND SURVIVORS INSURANCE

(OASI) AND DISABILITY INSURANCE (DI) TRUST FUNDS, IN 

CALENDAR YEAR 2004

Detailed information on the operations of the OASI and DI Trust Funds1

during calendar year 2004 is presented in this section. Chapter IV provides

projections for calendar years 2005-79.

1. OASI Trust Fund

A statement of the income and disbursements of the Federal Old-Age and

Survivors Insurance Trust Fund in calendar year 2004, and of the assets of

the fund at the beginning and end of the calendar year, is presented in table

III.A1. Included in total receipts during calendar year 2004 were

$473.3 billion in employment tax contributions. These contributions were

partially offset by transfers totaling $1.2 billion to the General Fund of the

Treasury for the estimated amount of refunds to employees who worked for

more than one employer during a year and paid contributions on total earnings in excess of the contribution and benefit base. 

Tax revenues that should have been received by the trust fund in 2000 and

2001, based on estimated deemed wage credits for military service prior to

2002, have been paid in full. Public Law 108-203 provided that the trust

funds be compensated for these taxes plus an adjustment for interest lost due

to the delay in remitting the taxes. The total amount of the compensation to

the OASI Trust Fund includes adjustments for actual data for years 1983-

2001, and was specified in the legislation to be $625 million.2

Net contributions thus amounted to $472.8 billion, an increase of 3.7 percent

over the amount in the preceding year. The increase in OASI tax contributions from calendar year 2003 to calendar year 2004 is due to increased earnings and the increase in the contribution and benefit base. (Table VI.A1

shows the tax rates and contribution and benefit bases in effect for past

years.)

Income based on taxation of benefits amounted to $14.6 billion in 2004, an

increase of about 16.8 percent from 2003. Nearly 99 percent of this income

represented amounts credited to the trust funds, based on estimated Federal

personal income taxation of benefits, generally in advance of the actual

 1 Trust fund data are available by month, quarter, or year on the Internet at www.socialsecurity.gov/OACT/

ProgData/fundsQuery.html.

 2 This legislation also required the deposit of $105 million to the DI Trust Fund and $173 million to the Hospital Insurance Trust Fund.
19

Calendar Year 2004 Operations

receipt of taxes by the Treasury. The remaining 1 percent of the total income

from taxation of benefits represented amounts withheld from the benefits

paid to nonresident aliens.

Note: Totals do not necessarily equal the sums of rounded components.

The OASI Trust Fund was credited with interest netting $79.0 billion, an

increase of about 5 percent over 2003. Credited interest consisted of (1)

interest earned on the investments of the trust fund, (2) interest on transfers

Table III.A1.—Operations of the OASI Trust Fund, Calendar Year 2004

[In millions]

Total assets, December 31, 2003 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $1,355,330

Receipts:

Contributions:

Employment taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $473,326

Payments from the General Fund of the Treasury for:

Contributions subject to refund . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1,193

Employee-employer contributions on deemed wage credits for

military service as specified by P.L. 108-203 . . . . . . . . . . . . . . . . . . . . . . . . . 625

Net contributions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 472,758

Income based on taxation of benefit payments:

Withheld from benefit payments to nonresident aliens . . . . . . . . . . . . . . . . . . . . . . 148

All other, not subject to withholding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,445

Total income from taxation of benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,593

Reimbursement from the general fund for costs of payments to uninsured persons who attained age 72 before 1968 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Investment income and interest adjustments:

Interest on investments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78,981

Interest adjustments1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Includes (1) interest on transfers between the trust fund and the general fund account for the Supplemental

Security Income program due to adjustments in the allocation of administrative expenses, (2) interest arising

from the revised allocation of administrative expenses among the trust funds and (3) interest on reimbursements to the trust fund for costs associated with union activities and pension reform.

6

Total investment income and interest adjustments. . . . . . . . . . . . . . . . . . . . . . . . 78,986

Gifts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2/

2 Less than $500,000.

Total receipts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 566,338

Disbursements:

Benefit payments:

Gross benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416,095

Offset for collected overpayments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1,013

Reimbursement from the general fund for unnegotiated checks . . . . . . . . . . . . . . . -50

Net benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415,031

Transfer to the Railroad Retirement “Social Security Equivalent Benefit Account” . 3,628

Payment for costs of vocational rehabilitation services for disabled beneficiaries . . . 3

Administrative expenses:

Costs incurred by:

Social Security Administration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,095

Department of the Treasury . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

Offsetting receipts from sales of supplies, materials, etc. . . . . . . . . . . . . . . . . . . . . -6

Miscellaneous reimbursements from the general fund 3 . . . . . . . . . . . . . . . . . . . . .

3 Reimbursements for costs incurred in performing certain legislatively mandated activities not directly

related to administering the OASI program.

-12

Net administrative expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,384

Total disbursements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 421,047

Net increase in assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145,292

Total assets, December 31, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,500,622
Financial Operations & Legislative Changes

20

between the trust fund and the general fund account for the Supplemental

Security Income program due to adjustments in the allocation of administrative expenses, (3) interest arising from the revised allocation of administrative expenses among the trust funds, and (4) interest on reimbursements to

the trust fund for costs associated with union activities and pension reform.

The remaining $34,121 of receipts consisted of gifts received under the provisions authorizing the deposit of money gifts or bequests in the trust funds.

Of the $421.0 billion in total disbursements, $415.0 billion was for net benefit payments. The amount of net benefit payments in calendar year 2004 represents an increase of 3.8 percent over the corresponding amount in calendar

year 2003. This increase was due to (1) an increase in the total number of

beneficiaries and (2) an increase in the average benefit amount primarily

because of the automatic cost-of-living benefit increase of 2.7 percent which

became effective for December 2003 under the automatic-adjustment provisions in section 215(i) of the Social Security Act.

Provisions of the Railroad Retirement Act require an annual financial interchange between the Railroad Retirement and OASDI programs. The purpose

of such provisions is to put the OASI and DI Trust Funds in the same financial position they would have been had railroad employment always been

covered by Social Security. Under those provisions, the Railroad Retirement

Board and the Commissioner of Social Security determined that a transfer of

$3.6 billion to the Social Security Equivalent Benefit Account from the

OASI Trust Fund was required in June 2004.

A disbursement of $3 million was made in 2004 to cover the costs of vocational rehabilitation services furnished to disabled widow(er) beneficiaries

and to those children of retired or deceased workers who were receiving benefits on the basis of disabilities that began before age 22. Reimbursement

from the trust funds for the costs of vocational rehabilitation services is made

only in those cases where the services contributed to the successful rehabilitation of the beneficiaries.

The remaining $2.4 billion of disbursements from the OASI Trust Fund represented net administrative expenses. The expenses incurred by various Federal agencies for administering the OASDI and Medicare programs are

allocated and charged directly to each of the trust funds through which those

programs are financed, on the basis of provisional estimates. Similarly, the

expenses allocated for administering the Supplemental Security Income program are charged directly to the General Fund of the Treasury on a provisional basis. Periodically, as actual experience develops and is analyzed,

adjustments to the allocations of administrative expenses for prior periods
21

Calendar Year 2004 Operations

are effected by interfund transfers and transfers between the OASI Trust

Fund and the general fund account for the Supplemental Security Income

program, with appropriate interest adjustments. As described earlier, the

interest adjustments arising from the reallocation of administrative expenses

are recorded in the trust fund accounting under investment income.

The vast majority of OASI disbursements recorded as administrative

expenses represent the cost of administering the program and are charged to

the trust fund by the Social Security Administration ($2.1 billion in 2004). In

addition, the Department of the Treasury charges directly to the trust fund

certain expenses that it incurs in helping to administer the OASI program

($307 million in 2004). Finally, there are some relatively small adjustments

which reduced total administrative expenses by $17 million in 2004. The

first of these adjustments is an offset ($6 million in 2004) representing

income from the sale of excess supplies and equipment. The second adjustment represents net reimbursements from the General Fund of the Treasury

for administrative costs incurred by the Social Security Administration in

performing certain legislatively mandated activities that are not directly

related to the OASI program. Such reimbursements totaled $12 million in

2004.

The assets of the OASI Trust Fund at the end of calendar year 2004 totaled

$1,500.6 billion (10.7 percent more than at the end of 2003), consisting of

$1,500.8 billion in U.S. Government obligations and, as an offset, an extension of credit amounting to $0.1 billion against securities to be redeemed

within the following few days. The effective annual rate of interest earned by

the assets of the OASI Trust Fund during calendar year 2004 was

5.7 percent, as compared to 6.0 percent earned during calendar year 2003. A

detailed listing of OASI Trust Fund holdings by type of security, interest rate,

and year of maturity at the end of each calendar year 2003 and 2004 can be

found in appendix A.

All securities held by the trust funds are backed by the full faith and credit of

the United States Government, as required by law. Those currently held by

the OASI Trust Fund are special issues (i.e., securities sold only to the trust

funds). These are of two types: short-term certificates of indebtedness and

long-term bonds. The certificates of indebtedness are issued on a daily basis

for the investment of receipts not required to meet current expenditures, and

they mature on the next June 30 following the date of issue. Special-issue

bonds, on the other hand, are normally acquired only when special issues of

either type mature on June 30. The amount of bonds acquired on June 30 is

equal to the amount of special issues maturing, less amounts required to meet

expenditures on that day.
Financial Operations & Legislative Changes

22

Section 201(d) of the Social Security Act provides that the obligations issued

for purchase by the OASI and DI Trust Funds shall have maturities fixed

with due regard for the needs of the funds. The usual practice has been to

spread the holdings of special issues, as of each June 30, so that the amounts

maturing in each of the next 15 years are approximately equal. Accordingly,

the amounts and maturity dates of the OASI special-issue bonds purchased

on June 30, 2004, with an interest rate of 4.625 percent, were selected so that

the maturity dates of the total portfolio of special issues were spread evenly

over the 15-year period 2005-19. The amount of bonds purchased on June

30, 2004 is shown in table III.A7.

2. DI Trust Fund

A statement of the income and disbursements of the Federal Disability Insurance Trust Fund in calendar year 2004, and of the assets of the fund at the

beginning and end of the calendar year, is presented in table III.A2.

Line entries in the DI statement are similar to those in the OASI statement

and the explanations of the OASI entries generally apply to DI as well.

Net contributions amounted to $80.3 billion, an increase of 3.7 percent from

the amount in the preceding calendar year. This increase is attributable to the

same factors, insofar as they apply to the DI program, that accounted for the

change in contributions to the OASI Trust Fund.

Of the $80.6 billion in total disbursements, $78.2 billion was for net benefit

payments. This represents an increase of 10.3 percent over the corresponding

amount of benefit payments in calendar year 2003. This increase in DI benefit payments is due to the same factors that resulted in the net increase in

benefit payments from the OASI Trust Fund. However, the number of persons receiving benefits from the DI Trust Fund increased more rapidly in

2004 than the number receiving benefits from the OASI Trust Fund largely

due to a) the current ages of the baby-boom generation, b) the scheduled

increase in the normal retirement age (NRA), and c) the special administrative action, undertaken by SSA beginning in 2001, to identify and award

benefits from the DI Trust Fund to a substantial number of current and

former recipients of Supplemental Security Income (SSI) benefits whose disability-insured status under the DI program was not previously recognized.
23

Calendar Year 2004 Operations

Note: Totals do not necessarily equal the sums of rounded components.

The assets of the DI Trust Fund at the end of calendar year 2004 totaled

$186.2 billion, consisting of $186.2 billion in U.S. Government obligations

and, as an offset, an extension of credit amounting to $3 million against securities to be redeemed within the following few days. The effective annual

rate of interest earned by the assets of the DI Trust Fund during calendar year

2004 was 5.7 percent, compared to 5.9 percent earned during calendar year

2003. A detailed listing of DI Trust Fund holdings by type of security, interest rate, and year of maturity at the end of each calendar year 2003 and 2004

can be found in appendix A.

Table III.A2.—Operations of the DI Trust Fund, Calendar Year 2004

[In millions]

Total assets, December 31, 2003 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $175,434

Receipts:

Contributions:

Employment taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $80,378

Payments from the General Fund of the Treasury for:

Contributions subject to refund . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -202

Employee-employer contributions on deemed wage credits for

military service as specified by P.L. 108-203 . . . . . . . . . . . . . . . . . . . . . . . . . 105

Net contributions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80,281

Income based on taxation of benefit payments:

Withheld from benefit payments to nonresident aliens . . . . . . . . . . . . . . . . . . . . . . 6

All other, not subject to withholding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,105

Total income from taxation of benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,111

Investment income and interest adjustments:

Interest on investments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,986

Interest adjustments1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Includes (1) interest on transfers between the trust fund and the general fund account for the Supplemental

Security Income program due to adjustments in the allocation of administrative expenses, (2) interest arising

from the revised allocation of administrative expenses among the trust funds, and (3) interest on reimbursements to the trust fund for costs associated with union activities and pension reform.

2

Total investment income and interest adjustments. . . . . . . . . . . . . . . . . . . . . . . . 9,988

Total receipts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91,380

Disbursements:

Benefit payments:

Gross benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78,697

Offset for collected overpayments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -495

Reimbursement from the general fund for unnegotiated checks . . . . . . . . . . . . . . . -22

Net benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78,180

Transfer to the Railroad Retirement “Social Security Equivalent Benefit Account” . 215

Payment for costs of vocational rehabilitation services for disabled beneficiaries . . . 49

Administrative expenses:

Costs incurred by:

Social Security Administration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,099

Department of the Treasury . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Miscellaneous reimbursements from the general fund2. . . . . . . . . . . . . . . . . . . . . .

2 Reimbursements for costs incurred in performing certain legislatively mandated activities not directly

related to administering the DI program.

-2

Net administrative expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,152

Total disbursements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80,597

Net increase in assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10,783

Total assets, December 31, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186,217
Financial Operations & Legislative Changes

24

3. OASI and DI Trust Funds, Combined

A statement of the operations of the income and disbursements of the OASI

and DI Trust Funds, on a combined basis, is presented in table III.A3. The

entries in this table represent the sums of the corresponding values from

tables III.A1 and III.A2. For a discussion of the nature of these income and

expenditure transactions, reference should be made to the two preceding subsections covering OASI and DI separately.

Note: Totals do not necessarily equal the sums of rounded components.

Table III.A3.—Operations of the Combined OASI and DI Trust Funds, 

Calendar Year 2004

[In millions]

Total assets, December 31, 2003 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $1,530,764

Receipts:

Contributions:

Employment taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $553,704

Payments from the General Fund of the Treasury for:

Contributions subject to refund . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1,395

Employee-employer contributions on deemed wage credits for

military service as specified by P.L. 108-203 . . . . . . . . . . . . . . . . . . . . . . . . . 730

Net contributions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 553,040

Income based on taxation of benefit payments:

Withheld from benefit payments to nonresident aliens . . . . . . . . . . . . . . . . . . . . . . 153

All other, not subject to withholding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15,550

Total income from taxation of benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15,703

Reimbursement from the general fund for costs of payments to uninsured persons who attained age 72 before 1968 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Investment income and interest adjustments:

Interest on investments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88,967

Interest adjustments1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Includes (1) interest on transfers between the trust funds and the general fund account for the Supplemental

Security Income program due to adjustments in the allocation of administrative expenses, (2) interest arising

from the revised allocation of administrative expenses among the trust funds, and (3) interest on reimbursements to the trust fund for costs associated with union activities and pension reform.

8

Total investment income and interest adjustments. . . . . . . . . . . . . . . . . . . . . . . . 88,974

Gifts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2/

2 Less than $500,000.

Total receipts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 657,718

Disbursements:

Benefit payments:

Gross benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494,792

Offset for collected overpayments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1,508

Reimbursement from the general fund for unnegotiated checks . . . . . . . . . . . . . . . -72

Net benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 493,212

Transfer to the Railroad Retirement “Social Security Equivalent Benefit Account” . 3,844

Payment for costs of vocational rehabilitation services for disabled beneficiaries . . . 52

Administrative expenses:

Costs incurred by:

Social Security Administration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,194

Department of the Treasury . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362

Offsetting receipts from sales of supplies, materials, etc. . . . . . . . . . . . . . . . . . . . . -6

Miscellaneous reimbursements from the general fund3. . . . . . . . . . . . . . . . . . . . . .

3 Reimbursements for costs incurred in performing certain legislatively mandated activities not directly

related to administering the OASI and DI programs.

-14

Net administrative expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,536

Total disbursements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501,643

Net increase in assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156,075

Total assets, December 31, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,686,839
25

Calendar Year 2004 Operations

To provide a context for estimates of future trust fund income and expenditures provided later in this report, table III.A4 compares past estimates of

contributions and benefit payments for calendar year 2004, as shown in the

2000-04 Annual Reports, with the corresponding actual amounts in 2004.1

A number of factors can contribute to differences between estimates and subsequent actual amounts, including actual values for key demographic, economic, and other variables that differ from previously assumed levels. In

addition, new legislation or other administrative initiatives that were unanticipated at the time the earlier estimates were completed can contribute to such

differences. For example, in the case of DI benefit payments, the special

 1 Estimated amounts used to calculate percentage errors are before rounding to amounts shown in the annual

reports.

Table III.A4.—Comparison of Actual Calendar Year 2004 Trust Fund Operations

With Estimates Made in Prior Reports1

[Amounts in billions]

1 The estimates shown are based on the intermediate assumptions.

Net contributions 2

2 “Actual” contributions for 2004 reflect adjustments for prior calendar years (see appendix A on page 125

for description of these adjustments). “Estimated” contributions also include such adjustments, but on an

estimated basis.

Benefit payments 3

3 Includes payments, if any, for vocational rehabilitation services furnished to disabled persons receiving

benefits because of their disabilities.

Amount

Difference

from actual

(percent) Amount

Difference

from actual

(percent)

OASI Trust Fund:

Estimate in 2000 report . . . . . . . . . . . . . . $505.7 7.0 $423.8 2.1

Estimate in 2001 report . . . . . . . . . . . . . . 514.1 8.7 427.4 3.0

Estimate in 2002 report . . . . . . . . . . . . . . 504.1 6.6 416.5 .3

Estimate in 2003 report . . . . . . . . . . . . . . 486.0 2.8 412.6 -.6

Estimate in 2004 report . . . . . . . . . . . . . . 471.0 -.4 415.2 4/

4 Less than 0.05 percent.

Actual amount . . . . . . . . . . . . . . . . . . . . . 472.8 — 415.0 —

DI Trust Fund:

Estimate in 2000 report . . . . . . . . . . . . . . 85.9 7.0 76.5 -2.2

Estimate in 2001 report . . . . . . . . . . . . . . 87.3 8.8 74.7 -4.5

Estimate in 2002 report . . . . . . . . . . . . . . 85.6 6.6 74.6 -4.7

Estimate in 2003 report . . . . . . . . . . . . . . 82.5 2.8 77.8 -.6

Estimate in 2004 report . . . . . . . . . . . . . . 79.9 -.4 76.6 -2.1

Actual amount . . . . . . . . . . . . . . . . . . . . . 80.3 — 78.2 —

OASI and DI Trust Funds, combined:

Estimate in 2000 report . . . . . . . . . . . . . . 591.5 7.0 500.3 1.4

Estimate in 2001 report . . . . . . . . . . . . . . 601.4 8.7 502.0 1.8

Estimate in 2002 report . . . . . . . . . . . . . . 589.7 6.6 491.0 -.4

Estimate in 2003 report . . . . . . . . . . . . . . 568.5 2.8 490.4 -.6

Estimate in 2004 report . . . . . . . . . . . . . . 550.9 -.4 491.8 -.3

Actual amount . . . . . . . . . . . . . . . . . . . . . 553.0 — 493.3 —
Financial Operations & Legislative Changes

26

administrative action, noted in the previous subsection and described in

greater detail in the section on short-range estimates, was not yet quantified

in the 2000 report. Furthermore, the size of the resulting workload and the

schedule for the completion of these cases have been revised several times

over the past 3 years. The evolving understanding of this special workload

played a significant role in the past variation in estimates for DI benefits in

2004.

At the end of calendar year 2004, about 47.7 million persons were receiving

monthly benefits under the OASDI program. Of these persons, about

39.7 million and 7.9 million were receiving monthly benefits from the OASI

Trust Fund and the DI Trust Fund, respectively. The number of persons

receiving benefits from the OASI and DI Trust Funds grew by 0.7 percent

and 4.7 percent, respectively, during the calendar year. The estimated distributions of benefit payments in calendar years 2003 and 2004, by type of beneficiary, are shown in table III.A5 for each trust fund separately.

Note: Totals do not necessarily equal the sums of rounded components.

Table III.A5.—Distribution of Benefit Payments by Type of Beneficiary or Payment, 

Calendar Years 2003 and 2004

[Amounts in millions]

Calendar year 2003 Calendar year 2004

Amount

Percentage

of total Amount

Percentage

of total

Total OASDI benefit payments . . . . . . . . . . $470,728 100.0 $493,212 100.0

OASI benefit payments . . . . . . . . . . . . . . 399,842 84.9 415,031 84.1

DI benefit payments . . . . . . . . . . . . . . . . . 70,886 15.1 78,180 15.9

OASI benefit payments, total. . . . . . . . . . . . 399,842 100.0 415,031 100.0

Monthly benefits:

Retired workers and auxiliaries . . . . . . 314,012 78.5 327,100 78.8

Retired workers . . . . . . . . . . . . . . . . 291,481 72.9 304,224 73.3

Spouses . . . . . . . . . . . . . . . . . . . . . . . 19,948 5.0 20,162 4.9

Children . . . . . . . . . . . . . . . . . . . . . . 2,582 .6 2,714 .7

Survivors of deceased workers. . . . . . . 85,624 21.4 87,726 21.1

Aged widows and widowers. . . . . . . 68,532 17.1 70,096 16.9

Disabled widows and widowers . . . . 1,512 .4 1,555 .4

Parents . . . . . . . . . . . . . . . . . . . . . . . 24 1/

1 Less than 0.05 percent.

24 1/1

Children . . . . . . . . . . . . . . . . . . . . . . 14,070 3.5 14,537 3.5

Widowed mothers and fathers 

caring for child beneficiaries . . . . 1,486 .4 1,515 .4

Uninsured persons generally aged 72 

before 1968 . . . . . . . . . . . . . . . . . . . 2/

2 Less than $500,000.

1/1 2/1 1/1

Lump-sum death payments . . . . . . . . . . . 206 .1 205 1/1

DI benefit payments, total . . . . . . . . . . . . . . 70,886 100.0 78,180 100.0

Disabled workers . . . . . . . . . . . . . . . . . 64,793 91.4 71,665 91.7

Spouses. . . . . . . . . . . . . . . . . . . . . . . . . 431 .6 454 .6

Children . . . . . . . . . . . . . . . . . . . . . . . . 5,662 8.0 6,061 7.8
27

Calendar Year 2004 Operations

Net administrative expenses charged to the OASI and DI Trust Funds in calendar year 2004 totaled $4.5 billion. This amount represented 0.8 percent of

contribution income and 0.9 percent of expenditures. Corresponding percentages for each trust fund separately and for the OASDI program as a whole

are shown in table III.A6 for each of the last 5 years.

Changes in the invested assets of the OASI and DI funds between the end of

2003 and the end of 2004 are a result of the acquisition and disposition of

securities during calendar year 2004. Table III.A7 presents these investment

transactions for each trust fund separately and combined. Tables VI.A5 and

VI.A6, presented in appendix A, show the assets of the OASI and DI Trust

Funds at the end of calendar years 2003 and 2004. 

Note: All investments are shown at par value.

Table III.A6.—Administrative Expenses as a Percentage of Contribution Income and of 

Total Expenditures, Calendar Years 2000-04

Calendar year 

OASI Trust Fund DI Trust Fund

OASI and DI

Trust Funds,

combined

Contribution

income

Total

expenditures

Contribution

income

Total

expenditures

Contribution

income

Total

expenditures

2000 . . . . . . . . . . . 0.5 0.6 2.3 2.9 0.8 0.9

2001 . . . . . . . . . . . .4 .5 2.3 2.8 .7 .8

2002 . . . . . . . . . . . .5 .5 2.7 3.0 .8 .9

2003 . . . . . . . . . . . .6 .6 2.6 2.7 .9 1.0

2004 . . . . . . . . . . . .5 .6 2.7 2.7 .8 .9

Table III.A7.—Trust Fund Investment Transactions, Calendar Year 2004

[In millions]

OASI

Trust Fund

DI

Trust Fund

OASI and DI

Trust Funds,

combined

Invested assets, December 31, 2003 . . . . . . . . $1,355,111 $175,252 $1,530,364

Acquisitions:

Special issues:

Certificates of indebtedness . . . . . . . . . . . 533,390 87,418 620,808

Bonds1 . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Amounts shown were purchased on June 30, 2004. The interest rate on such purchases was 4.625 percent.

224,416 24,211 248,627

Public issues:2

2 Dash indicates no holdings at any time during the year; zero indicates holdings throughout the year but no

transactions.

Treasury bonds . . . . . . . . . . . . . . . . . . . . . —00

Total acquisitions . . . . . . . . . . . . . . . . . . . 757,806 111,629 869,435

Dispositions:

Special issues:

Certificates of indebtedness . . . . . . . . . . . 523,591 87,625 611,215

Bonds . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88,563 13,036 101,599

Public issues:2

Treasury bonds . . . . . . . . . . . . . . . . . . . . . —00

Total dispositions . . . . . . . . . . . . . . . . . . . 612,153 100,660 712,814

Net increase in invested assets. . . . . . . . . . . . . 145,653 10,969 156,622

Invested assets, December 31, 2004 . . . . . . . . 1,500,764 186,221 1,686,985
Financial Operations & Legislative Changes

28

B. SOCIAL SECURITY AMENDMENTS SINCE THE 2004 REPORT

Since the 2004 Annual Report was transmitted to Congress on March 23,

2004, there has been no legislation enacted that would have a significant

effect on the financial status of the OASDI program. However, as stated in

the 2004 Annual Report, the Social Security Protection Act of 2004, Public

Law 108-203, was enacted March 2, 2004, too late for the inclusion of the

projection of its financial effects in that report. Those effects, which are estimated to be negligible over the long-range period as a whole, are included in

this report. The provisions to deny Social Security benefits to fugitive felons

and persons fleeing prosecution, to cap the assessment for SSA processing

attorney fees, and to transfer overdue taxes on deemed wage credits for military service have the most significant financial effects on the OASDI program.
29

Short-Range Estimates

IV. ACTUARIAL ESTIMATES

This chapter presents actuarial estimates of the future financial condition of

the Social Security program. These estimates include projected income and

cost of the OASI and DI Trust Funds, in dollars over the next 10 years and as

a percentage of taxable payroll or in present-value dollars over the full

75-year period, along with a discussion of a variety of measures of the adequacy of current program financing. In this report we carefully distinguish

between (1) the cost (or obligations) of the program, which includes, for the

future, all benefits scheduled under current law, and (2) expenditures (disbursements or outgo), which include actual payments for the past and only

the portion of the cost of the program that is projected to be payable with the

financing provisions in current law.

As described in the Overview section of this report, these estimates depend

upon a broad set of demographic, economic, and programmatic factors.

Since assumptions related to these factors are subject to uncertainty, the estimates presented in this section are prepared under three sets of assumptions,

to show a range of possible outcomes. The intermediate set of assumptions,

designated as alternative II, reflects the Trustees’ best estimate of future

experience; the low cost alternative I is more optimistic and the high cost

alternative III more pessimistic for the trust funds’ future financial outlook.

The intermediate estimates are shown first in the tables in this report, followed by the low cost and high cost estimates. These sets of assumptions,

along with actuarial methods used to produce the estimates, are described in

chapter V. In this chapter, the estimates and measures of trust fund financial

adequacy for the short range (2005-14) are presented first, followed by estimates and measures of actuarial status for the long range (2005-79) and for

the infinite future. As an additional illustration of uncertainty, estimated

probability distributions of certain measures are presented in appendix E.

A. SHORT-RANGE ESTIMATES

In the short range, the adequacy of the trust fund level is generally measured

by the “trust fund ratio,” which is defined to be the assets at the beginning of

the year expressed as a percentage of the projected cost for the year. Thus,

the trust fund ratio represents the proportion of a year’s cost which can be

paid with the funds available at the beginning of the year. During periods

when trust fund income exceeds disbursements, the excess is held in the trust

funds which serve to advance fund a portion of the Social Security program’s

future financial obligations. During periods when trust fund disbursements

exceed income, as might happen during an economic recession, trust fund

assets are used to meet the shortfall. In the event of recurring shortfalls for an

extended period, the trust funds can allow time for the development, enactment, and implementation of legislation to restore financial stability to the

program.
Actuarial Estimates

30

The test of financial adequacy over the short-range projection period is applicable to the OASI and DI Trust Funds individually and on a combined basis.

The requirements of this test are as follows: If the estimated trust fund ratio

is at least 100 percent at the beginning of the projection period, then it must

be projected to remain at or above 100 percent throughout the 10-year projection period. Alternatively, if the ratio is initially less than 100 percent,

then it must be projected to reach a level of at least 100 percent within

5 years and to remain at or above 100 percent throughout the remainder of

the 10-year period. In addition, the fund’s estimated assets at the beginning

of each month of the 10-year period must be sufficient to cover that month’s

disbursements. This test is applied on the basis of the intermediate estimates.

Failure to meet this test by either trust fund is an indication that solvency of

the program over the next 10 years is in question and that legislative action is

needed to improve the short-range financial adequacy of the program.

1. Operations of the OASI Trust Fund

This subsection presents estimates of the operations and financial status of

the OASI Trust Fund for the period 2005-14, based on the assumptions

described in chapter V. No changes are assumed to occur in the present statutory provisions and regulations under which the OASDI program operates.1

These estimates are shown in table IV.A1 and indicate that the assets of the

OASI Trust Fund would continue to increase rapidly throughout the next 10

years under all three sets of assumptions. Also, based on the intermediate

assumptions, the assets of the OASI Trust Fund would continue to exceed

100 percent of annual expenditures by a steadily increasing amount through

the end of 2014. Consequently, the OASI Trust Fund satisfies the test of

short-range financial adequacy by a wide margin. The estimates in table

IV.A1 also indicate that the short-range test would be satisfied even under the

high cost assumptions (see figure IV.A1 for graphical illustration of these

results).

The increases in estimated income shown in table IV.A1 under each set of

assumptions reflect increases in estimated OASDI taxable earnings and

growth in interest earnings on the invested assets of the trust fund. For each

alternative, employment and earnings are assumed to increase in every year

through 2014. The number of persons with taxable earnings would increase

on the basis of alternatives I, II, and III from 157 million during calendar

year 2004 to about 174 million, 171 million, and 168 million, respectively, in

2014. The total annual amount of taxable earnings is projected to increase

from $4,515 billion in 2004 to $7,231 billion, $7,284 billion, and

 1 The estimates shown in this subsection reflect 12 months of benefit payments in each year of the shortrange projection period. In practice, the actual payment dates have at times been shifted over calendar year

boundaries as a result of the statutory requirement that benefit checks be delivered early when the normal

check delivery date is a Saturday, Sunday, or legal public holiday. The annual benefit figures are shown as if

those benefit checks were delivered on the usual date.
31

Short-Range Estimates

$7,553 billion, in 2014, on the basis of alternatives I, II, and III, respectively.1 These increases in taxable earnings are due primarily to (1) projected

increases in employment levels as the working age (20-64) population

increases, (2) increases in average earnings in covered employment (reflecting both real growth and price inflation), and (3) increases in the contribution

and benefit base in 2005-14 under the automatic-adjustment provisions.

Growth in interest earnings represents a significant component of the overall

increase in trust fund income during this period. Although interest rates payable on trust fund investments are not assumed to change substantially from

current levels, the continuing rapid increase in OASI assets will result in a

corresponding increase in interest income. By 2014, interest income to the

OASI Trust Fund is projected to be about 19.6 percent of total trust fund

income on the basis of the intermediate assumptions, as compared to

13.9 percent in 2004.

 1 Note that the pattern, by alternative, of these nominal amounts of total wages is not what might be

expected, but the reverse, because of the varying inflation assumptions embedded in the respective estimates.

 Figure IV.A1.—Short-Range OASI and DI Trust Fund Ratios

[Assets as a percentage of annual cost]

0%

50%

100%

150%

200%

250%

300%

350%

400%

450%

500%

550%

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014

Calendar year

OASI

DI

Historical Estimated

"Adequate" level for trust fund ratio

I

II

III

I

II

III
Actuarial Estimates

32

Note: Totals do not necessarily equal the sums of rounded components.

Table IV.A1.—Operations of the OASI Trust Fund, Calendar Years 2000-141

[Amounts in billions]

1 A detailed description of the components of income and cost, along with complete historical values, is presented in appendix A.

Calendar

year

Income Cost Assets

Total2

2 “Total Income” column includes transfers made between the OASI Trust Fund and the General Fund of the

Treasury that are not included in the separate components of income shown. These transfers consist of payments for (1) the cost of noncontributory wage credits for military service before 1957, and (2) the cost of

benefits to certain uninsured persons who attained age 72 before 1968. In February 2002, $414 million was

transferred from the General Fund of the Treasury to the OASI Trust Fund for the cost of pre-1957 military

service wage credits. Such transfers are estimated to be less than $500,000 in each year of the projection

period.

Net

contributions

Taxation of

benefits

Net

interest Total

Benefit

payments

Administrative

costs

RRB

interchange

Net

increase

during

year

Amount

at end

of year

Trust

fund

ratio3

3 The “Trust fund ratio” column represents assets at the beginning of a year (which are identical to assets at

the end of the prior year shown in the “Amount at end of year” column) as a percentage of cost for the year.

Historical data:

2000 . . $490.5 $421.4 $11.6 $57.5 $358.3 $352.7 $2.1 $3.5 $132.2 $931.0 223

2001 . . 518.1 441.5 11.9 64.7 377.5 372.3 2.0 3.3 140.6 1,071.5 247

2002 . . 539.7 455.2 12.9 71.2 393.7 388.1 2.1 3.5 146.0 1,217.5 272

2003 . . 543.8 456.1 12.5 75.2 406.0 399.8 2.6 3.6 137.8 1,355.3 300

2004 . . 566.3 472.8 14.6 79.0 421.0 415.0 2.4 3.6 145.3 1,500.6 322

Intermediate:

2005 . . 594.3 496.7 14.0 83.6 440.2 433.7 3.0 3.5 154.1 1,654.7 341

2006 . . 634.2 528.8 15.2 90.3 456.5 450.0 3.0 3.5 177.7 1,832.4 362

2007 . . 671.5 554.8 16.6 100.1 476.6 469.9 3.0 3.7 194.9 2,027.3 384

2008 . . 713.5 582.6 19.5 111.4 501.4 494.8 2.9 3.7 212.1 2,239.5 404

2009 . . 754.6 611.3 19.7 123.5 530.7 524.1 2.9 3.7 223.8 2,463.3 422

2010 . . 799.6 641.1 21.9 136.7 564.1 557.4 2.9 3.8 235.5 2,698.9 437

2011 . . 848.7 672.0 25.8 150.9 601.5 594.8 3.0 3.7 247.2 2,946.0 449

2012 . . 897.5 703.2 28.8 165.4 643.2 636.2 3.0 3.9 254.3 3,200.3 458

2013 . . 946.9 734.5 32.0 180.4 689.2 682.1 3.1 4.1 257.7 3,458.0 464

2014 . . 997.6 767.4 34.5 195.7 739.0 731.6 3.1 4.2 258.6 3,716.6 468

Low Cost:

2005 . . 594.2 496.6 14.0 83.6 439.9 433.4 3.0 3.5 154.2 1,654.9 341

2006 . . 634.6 529.6 15.1 89.9 454.9 448.4 3.0 3.5 179.7 1,834.6 364

2007 . . 670.5 555.4 16.5 98.6 472.5 465.9 3.0 3.7 197.9 2,032.5 388

2008 . . 711.2 583.2 19.2 108.8 492.3 485.7 2.9 3.6 218.9 2,251.4 413

2009 . . 751.1 611.8 19.2 120.1 515.7 509.2 2.9 3.6 235.3 2,486.8 437

2010 . . 795.1 641.3 21.0 132.8 542.7 536.2 2.9 3.6 252.4 2,739.2 458

2011 . . 843.1 671.8 24.6 146.7 573.1 566.6 2.9 3.5 270.0 3,009.2 478

2012 . . 890.9 701.9 27.2 161.7 607.1 600.5 3.0 3.7 283.8 3,293.0 496

2013 . . 939.2 731.4 29.9 177.9 644.8 638.0 3.0 3.8 294.5 3,587.5 511

2014 . . 988.5 762.0 32.0 194.6 685.4 678.5 3.0 3.9 303.1 3,890.6 523

High Cost:

2005 . . 586.1 489.9 14.0 82.2 440.4 433.9 3.0 3.5 145.7 1,646.3 341

2006 . . 614.8 510.9 15.3 88.6 459.7 453.1 3.0 3.5 155.1 1,801.4 358

2007 . . 657.0 541.7 16.8 98.5 482.1 475.4 3.0 3.7 174.9 1,976.3 374

2008 . . 694.5 565.0 19.8 109.7 508.7 502.0 2.9 3.7 185.9 2,162.2 389

2009 . . 744.4 598.6 20.4 125.5 548.0 541.2 3.0 3.8 196.4 2,358.6 395

2010 . . 817.7 644.8 23.2 149.7 598.9 591.9 3.1 3.9 218.8 2,577.4 394

2011 . . 882.7 686.3 28.1 168.3 654.6 647.5 3.2 4.0 228.0 2,805.4 394

2012 . . 937.4 723.4 31.9 182.0 711.3 703.6 3.2 4.4 226.1 3,031.5 394

2013 . . 989.4 759.0 35.6 194.8 768.3 760.3 3.3 4.7 221.1 3,252.6 395

2014 . . 1,041.8 795.5 38.7 207.6 830.1 821.8 3.4 5.0 211.7 3,464.2 392
33

Short-Range Estimates

Rising expenditures during 2005-14 reflect automatic benefit increases as

well as the upward trend in the number of beneficiaries and in the average

monthly earnings underlying benefits payable by the program. The growth in

the number of beneficiaries in the past and the expected growth in the future

result both from the increase in the aged population and from the increase in

the proportion of the population which is eligible for benefits.

The estimates under all three sets of assumptions shown in table IV.A1 indicate that income to the OASI Trust Fund would substantially exceed expenditures in every year of the short-range projection period, and assets are

therefore estimated to increase substantially.

The portion of the OASI Trust Fund that is not needed to meet day-to-day

expenditures is used to purchase financial securities, generally special public-debt obligations of the U.S. Government. The cash used to make these

purchases flows to the General Fund of the Treasury and is used to meet various Federal outlays or to reduce the amount of publicly-held Federal debt.

Interest on these securities is paid to the trust fund and, when the securities

mature or are redeemed prior to maturity, general fund revenues flow to the

trust fund. Thus, the investment operations of the trust fund result in various

cash flows between the trust fund and the General Fund of the Treasury.

Currently, the excess of tax income to the OASI Trust Fund over the fund’s

expenditures is borrowed by the general fund, resulting in a substantial net

cash flow to the general fund. As discussed in the following section on page

50, this cash flow will reverse sometime in the next 10-20 years. Thereafter,

increasingly larger amounts will be needed from trust fund assets to meet

benefit payments and other expenditures. Revenue from the General Fund of

the Treasury will be drawn upon to provide the necessary cash. The accumulation and subsequent redemption of substantial trust fund assets has important public policy and economic implications that extend well beyond the

operation of the OASDI program itself.

2. Operations of the DI Trust Fund

The estimated operations and financial status of the DI Trust Fund during

calendar years 2005-14 under the three sets of assumptions are shown in

table IV.A2, together with figures on actual experience in 2000-04. Income is

generally projected to increase steadily under each alternative, reflecting

most of the same factors described previously in connection with the OASI

Trust Fund. The estimates indicate that the assets of the DI Trust Fund would

also continue to increase throughout the next 10 years under the intermediate

and low cost assumptions, but at a lower rate than for the OASI Trust Fund.

Under the high cost assumptions, DI assets would increase through 2006 and

decline steadily thereafter.
Actuarial Estimates

34

Expenditures are estimated to increase because of automatic benefit

increases and projected increases in the amounts of average monthly earnings on which benefits are based. In addition, under all three sets of assumptions, the number of DI beneficiaries in current-payment status is projected

to continue increasing throughout the short-range projection period. Over the

period 2004-14, the projected annual average growth rate in the number of

DI worker beneficiaries is roughly 1.8, 2.9, and 4.4 percent under alternatives I, II, and III, respectively. Growth is largely attributable to the gradual

progression of the baby-boom generation through ages 50-65, at which

higher rates of disability incidence are experienced.

Recent annual increases in incidence rates over the period 2001-03 represented a notable departure from the experience of the preceding decade,

which generally showed modest annual declines in the age-sex-adjusted disability incidence rate.1 These increases were likely due in large part to the

slowdown in economic growth experienced during that period. However, a

special administrative activity undertaken by SSA beginning in 2001 has

also contributed slightly to the upsurge in disabled worker awards. This special workload was the result of discovering a substantial number of current or

former recipients of Supplemental Security Income (SSI) benefits whose disability-insured status under the DI program was not previously recognized.

As this special disability workload is processed over the next several years,

the resulting disability awards will contribute to temporarily higher incidence

rates than would have been expected as part of longer term underlying

trends.

Estimates of the total size of this special workload, and the time required to

process these claims, remain roughly the same as assumed for the 2004

report. After the last of the special workload cases is processed, the incidence

rates projected in this report are estimated to drop back somewhat from

recent levels, consistent with an assumed return to faster economic growth.

Incidence rates are then expected to return to levels roughly in line with

those assumed in last year’s report under the three alternative sets of assumptions.

 1 Historical and projected patterns of disability incidence rates are described in greater detail in section

V.C.6.
35

Short-Range Estimates

Note: Totals do not necessarily equal the sums of rounded components.

Table IV.A2.—Operations of the DI Trust Fund, Calendar Years 2000-141

[Amounts in billions]

1 A detailed description of the components of income and cost, along with complete historical values, is presented in appendix A.

Calendar

year

Income Cost Assets

Total2

2 “Total Income” column includes transfers made between the DI Trust Fund and the General Fund of the

Treasury that are not included in the separate components of income shown. These transfers consist of payments for the cost of noncontributory wage credits for military service before 1957. In particular, a transfer

was made in December 2000 in the amount of $836 million from the DI Trust Fund to the General Fund of

the Treasury. Such transfers are estimated to be less than $500,000 in each year of the projection period.

Net

contributions

Taxation of

benefits

Net

interest Total

Benefit

payments

Administrative

costs

RRB

interchange

Net

increase

during

year

Amount

at end

of year

Trust

fund

ratio3

3 The “Trust fund ratio” column represents assets at the beginning of a year (which are identical to assets at

the end of the prior year shown in the “Amount at end of year” column) as a percentage of cost for the year.

Historical data:

2000 . . $77.9 $71.1 $0.7 $6.9 $56.8 $55.0 $1.6 $0.2 $21.1 $118.5 171

2001 . . 83.9 74.9 .8 8.2 61.4 59.6 1.7 4/

4 Less than $50 million.

22.5 141.0 193

2002 . . 87.4 77.3 .9 9.2 67.9 65.7 2.0 .2 19.5 160.5 208

2003 . . 88.1 77.4 .9 9.7 73.1 70.9 2.0 .2 15.0 175.4 219

2004 . . 91.4 80.3 1.1 10.0 80.6 78.2 2.2 .2 10.8 186.2 218

Intermediate:

2005 . . 95.6 84.3 1.1 10.2 86.4 83.9 2.3 .3 9.2 195.4 215

2006 . . 101.5 89.8 1.2 10.5 91.7 89.0 2.4 .3 9.9 205.3 213

2007 . . 106.6 94.2 1.4 11.0 97.5 94.8 2.4 .3 9.1 214.4 211

2008 . . 112.1 98.9 1.7 11.5 104.2 101.3 2.5 .4 7.9 222.3 206

2009 . . 117.4 103.8 1.7 11.8 112.8 109.7 2.7 .4 4.6 226.9 197

2010 . . 122.9 108.9 2.0 12.1 118.3 115.1 2.8 .4 4.6 231.4 192

2011 . . 128.8 114.1 2.3 12.4 124.3 120.9 3.0 .4 4.5 235.9 186

2012 . . 134.7 119.4 2.7 12.6 132.3 128.7 3.2 .5 2.3 238.3 178

2013 . . 140.5 124.7 3.0 12.7 139.6 135.9 3.3 .5 .8 239.1 171

2014 . . 146.3 130.3 3.2 12.8 147.4 143.4 3.5 .5 -1.1 238.0 162

Low Cost:

2005 . . 95.6 84.3 1.1 10.2 85.1 82.5 2.3 .3 10.6 196.8 219

2006 . . 101.7 89.9 1.2 10.6 89.1 86.5 2.4 .3 12.6 209.4 221

2007 . . 106.8 94.3 1.3 11.2 93.5 90.8 2.4 .3 13.3 222.7 224

2008 . . 112.4 99.0 1.6 11.8 98.1 95.2 2.5 .4 14.4 237.0 227

2009 . . 118.0 103.9 1.6 12.5 104.2 101.2 2.6 .4 13.8 250.8 227

2010 . . 123.9 108.9 1.8 13.2 107.5 104.3 2.8 .4 16.5 267.3 233

2011 . . 130.3 114.1 2.1 14.2 110.9 107.6 2.9 .4 19.4 286.7 241

2012 . . 136.8 119.2 2.3 15.3 115.8 112.3 3.1 .4 21.0 307.7 248

2013 . . 143.3 124.2 2.6 16.5 119.9 116.3 3.2 .4 23.3 331.1 257

2014 . . 149.9 129.4 2.7 17.9 124.2 120.4 3.4 .4 25.7 356.8 267

High Cost:

2005 . . 94.3 83.2 1.1 10.0 89.3 86.8 2.3 .3 5.0 191.2 209

2006 . . 98.0 86.7 1.3 10.0 97.5 94.8 2.4 .3 .5 191.8 196

2007 . . 103.4 92.0 1.5 9.9 106.5 103.8 2.4 .3 -3.1 188.7 180

2008 . . 107.4 95.9 1.9 9.6 116.0 113.1 2.5 .4 -8.5 180.1 163

2009 . . 112.6 101.6 2.0 9.0 129.7 126.6 2.7 .4 -17.1 163.1 139

2010 . . 119.9 109.5 2.4 8.0 141.2 137.8 3.0 .4 -21.3 141.8 116

2011 . . 126.2 116.5 2.9 6.8 152.6 149.0 3.2 .5 -26.4 115.4 93

2012 . . 131.4 122.8 3.3 5.2 165.3 161.5 3.4 .5 -34.0 81.4 70

2013 . . 136.3 128.9 3.8 3.6 176.1 172.0 3.6 .5 -39.8 41.6 46

2014 . . 5/

5 Under the high cost assumptions, the DI Trust Fund is projected to be exhausted in late 2014. Therefore,

certain trust fund operation values for that year are not meaningful under present law and are not shown in

this table.

135.1 4.1 5/1 187.5 183.2 3.8 .5 5/1 5/1 22
Actuarial Estimates

36

The proportion of DI beneficiaries whose benefits terminate in a given year

has also fluctuated significantly in the past. Over the last 20 years, the rates

of benefit termination due to death or conversion to retirement benefits (at

attainment of normal retirement age) have declined very gradually. This

trend is attributable, in part, to the lower average age of new beneficiaries.

However, some recent program changes and health trends have also led to

improved mortality experience among the DI disabled worker beneficiaries.

The termination rate due to recovery has been much more volatile. Currently,

the proportion of disabled beneficiaries whose benefits cease because of their

recovery from disability is very low in comparison to levels experienced

throughout the 1970s and early 1980s. Projected levels of recovery terminations for this year’s report remain consistent with last year’s report. The

overall termination rate (reflecting all causes) is projected to remain near the

2003 level before increasing back to higher levels in 2009 when the gradual

increase in the normal retirement age temporarily ceases.

At the beginning of calendar year 2004, the assets of the DI Trust Fund represented 218 percent of annual expenditures. During 2004, DI income

exceeded DI expenditures by only $10.8 billion, contributing to a decrease in

the trust fund ratio for the beginning of 2005 to about 215 percent. Under the

intermediate set of assumptions, total income is estimated to exceed expenditures in each year of the short-range projection period. However, the projected decline in the trust fund ratio to 162 percent by the beginning of 2014

is an early warning of the eventual shortfall in available DI Trust Fund assets

needed to cover program cost—projected under the intermediate assumptions to occur after the end of the short-range period.

Under the low cost assumptions, the trust fund ratio would increase to

267 percent at the beginning of 2014. Under the high cost assumptions, the

assets of the DI Trust Fund would decline steadily, dipping below the level of

1 year’s expenditures near the middle of 2010, and is projected to become

completely depleted near the end of 2014.

Because DI assets were greater than 1 year’s expenditures at the beginning of

2005 and would remain above that level in 2006 and later, the DI Trust Fund

satisfies the Trustees’ short-range test of financial adequacy under both the

intermediate and low cost assumptions. However, under the high cost

assumptions the DI Trust Fund fails to meet the short-range test of financial

adequacy, because assets fall below 1 year’s expenditures by the end of the

short-range period, as described above (see also figure IV.A1).
37

Short-Range Estimates

3. Operations of the Combined OASI and DI Trust Funds

The estimated operations and status of the OASI and DI Trust Funds, combined, during calendar years 2005-14 on the basis of the three alternatives,

are shown in table IV.A3, together with figures on actual experience in

2000-04. Because income and cost for the OASI Trust Fund represent over

80 percent of the corresponding amounts for the combined OASI and DI

Trust Funds, the operations of the OASI Trust Fund tend to dominate the

combined operations of the two funds. Consequently, based on the strength

of the OASI Trust Fund over the next 10 years, the combined OASI and DI

Trust Funds meet the requirements of the short-range test of financial adequacy under all three alternative sets of assumptions.

While combining the operations of the OASI and DI Trust Funds permits an

assessment of the short-range test for the two programs on a combined basis,

in practice assets from one trust fund cannot be shared with another trust

fund without legislative changes to the Social Security Act. For example,

under the high cost scenario, table IV.A2 shows that the DI Trust Fund

becomes exhausted in 2014. The value of the combined OASI and DI Trust

Funds in that year shown in table IV.A3 implies that OASI assets could be

made available to pay DI benefits once the DI Trust Fund is exhausted.

Table IV.A3.—Operations of the Combined OASI and DI Trust Funds,

Calendar Years 2000-141

[Amounts in billions]

Calendar

year

Income Cost Assets

Total2

Net

contributions

Taxation of

benefits

Net

interest Total

Benefit

payments

Administrative

costs

RRB

interchange

Net

increase

during

year

Amount

at end

of year

Trust

fund

ratio3

Historical data:

2000 . . $568.4 $492.5 $12.3 $64.5 $415.1 $407.6 $3.8 $3.7 $153.3 $1,049.4 216

2001 . . 602.0 516.4 12.7 72.9 438.9 431.9 3.7 3.3 163.1 1,212.5 239

2002 . . 627.1 532.5 13.8 80.4 461.7 453.8 4.2 3.6 165.4 1,378.0 263

2003 . . 631.9 533.5 13.4 84.9 479.1 470.8 4.6 3.7 152.8 1,530.8 288

2004 . . 657.7 553.0 15.7 89.0 501.6 493.3 4.5 3.8 156.1 1,686.8 305

Intermediate:

2005 . . 689.9 581.0 15.1 93.8 526.6 517.6 5.3 3.8 163.3 1,850.1 320

2006 . . 735.8 618.6 16.4 100.8 548.2 539.0 5.4 3.8 187.6 2,037.7 337

2007 . . 778.1 649.0 18.0 111.1 574.1 564.7 5.3 4.0 204.0 2,241.7 355

2008 . . 825.6 681.5 21.2 122.9 605.5 596.1 5.4 4.0 220.1 2,461.8 370

2009 . . 871.9 715.1 21.5 135.4 643.5 633.8 5.6 4.1 228.4 2,690.2 383

2010 . . 922.5 749.9 23.8 148.7 682.4 672.5 5.8 4.2 240.1 2,930.3 394

2011 . . 977.5 786.1 28.2 163.2 725.8 715.7 6.0 4.1 251.7 3,182.0 404

2012 . . 1,032.1 822.6 31.5 178.0 775.6 765.0 6.2 4.4 256.6 3,438.6 410

2013 . . 1,087.4 859.3 35.0 193.2 828.9 817.9 6.4 4.5 258.5 3,697.1 415

2014 . . 1,143.9 897.7 37.7 208.5 886.4 875.0 6.6 4.7 257.5 3,954.6 417
Actuarial Estimates

38

Note: Totals do not necessarily equal the sums of rounded components.

4. Factors Underlying Changes in 10-Year Trust Fund Ratio Estimates

From the 2004 Report

The factors underlying the changes in the intermediate estimates for the

OASI, DI and the combined funds from last year’s annual report to this

report are analyzed in table IV.A4. In the 2004 Annual Report, the trust fund

ratio for OASI was estimated to reach 492 percent at the beginning of

2013—the tenth projection year from that report. If there had been no

changes to the projections, the estimated ratio at the beginning of 2014

would be 6 percentage points higher than at the beginning of 2013, or

498 percent. There were changes, however, to reflect the latest actual data, as

well as adjustments to the assumptions for future years. The resulting ratio

shown in this report for the tenth projection year (2014) is 468 percent. The

net effect of changes in demographic assumptions over the short-range

period resulted in an estimated small net reduction in the tenth-year trust

Low Cost:

2005 . . $689.8 $580.9 $15.1 $93.8 $525.0 $515.9 $5.3 $3.8 $164.8 $1,851.6 321

2006 . . 736.4 619.5 16.3 100.5 544.1 534.9 5.4 3.8 192.3 2,043.9 340

2007 . . 777.3 649.7 17.8 109.8 566.0 556.7 5.3 4.0 211.3 2,255.2 361

2008 . . 823.7 682.3 20.8 120.6 590.4 581.0 5.4 4.0 233.3 2,488.5 382

2009 . . 869.1 715.7 20.8 132.6 620.0 610.4 5.5 4.0 249.1 2,737.6 401

2010 . . 919.0 750.2 22.8 146.0 650.2 640.5 5.7 4.0 268.9 3,006.5 421

2011 . . 973.4 785.8 26.7 160.9 684.0 674.2 5.8 3.9 289.5 3,296.0 440

2012 . . 1,027.7 821.1 29.5 177.0 722.9 712.8 6.0 4.1 304.7 3,600.7 456

2013 . . 1,082.5 855.6 32.5 194.4 764.7 754.3 6.2 4.2 317.8 3,918.5 471

2014 . . 1,138.4 891.3 34.6 212.4 809.6 798.9 6.4 4.3 328.9 4,247.4 484

High Cost:

2005 . . 680.4 573.0 15.1 92.2 529.7 520.6 5.3 3.8 150.7 1,837.5 318

2006 . . 712.8 597.6 16.6 98.6 557.1 548.0 5.4 3.8 155.6 1,993.1 330

2007 . . 760.5 633.7 18.3 108.4 588.6 579.2 5.3 4.1 171.8 2,165.0 339

2008 . . 802.0 661.0 21.7 119.3 624.6 615.1 5.4 4.1 177.3 2,342.3 347

2009 . . 857.1 700.2 22.4 134.5 677.7 667.8 5.7 4.2 179.4 2,521.7 346

2010 . . 937.6 754.2 25.6 157.8 740.1 729.7 6.0 4.3 197.5 2,719.2 341

2011 . . 1,008.9 802.8 31.0 175.1 807.3 796.5 6.3 4.5 201.6 2,920.8 337

2012 . . 1,068.7 846.3 35.2 187.2 876.6 865.1 6.6 4.9 192.1 3,112.9 333

2013 . . 1,125.7 887.9 39.4 198.4 944.4 932.3 6.9 5.2 181.3 3,294.2 330

2014 . . 1,182.5 930.6 42.8 209.1 1,017.6 1,005.0 7.2 5.5 164.9 3,459.1 324

1 A detailed description of the components of income and cost, along with complete historical values, is presented in appendix A.

2 “Total Income” column includes transfers made between the OASI and DI Trust Funds and the General Fund

of the Treasury that are not included in the separate components of income shown. These transfers consist of

payments for (1) the cost of noncontributory wage credits for military service before 1957, and (2) the cost of

benefits to certain uninsured persons who attained age 72 before 1968. Such transfers are estimated to be less

than $500,000 in each year of the projection period.

3 The “Trust fund ratio” column represents assets at the beginning of a year (which are identical to assets at the

end of the prior year shown in the “Amount at end of year” column) as a percentage of cost for the year.

Table IV.A3.—Operations of the Combined OASI and DI Trust Funds,

Calendar Years 2000-141 (Cont.)

[Amounts in billions]

Calendar

year

Income Cost Assets

Total2

Net

contributions

Taxation of

benefits

Net

interest Total

Benefit

payments

Administrative

costs

RRB

interchange

Net

increase

during

year

Amount

at end

of year

Trust

fund

ratio3
39

Short-Range Estimates

fund ratio. The cumulative net effects of changes in economic data and

assumptions (including re-estimates of future tax revenue consistent with

recent revisions to historical data) resulted in a reduction in the trust fund

ratio of 26 percentage points by the beginning of 2014. A further reduction

was due to the net effect of various factors labeled collectively as “programmatic data and assumptions.” Finally, updated estimates of future earnings

patterns used to project average amounts paid to newly-awarded beneficiaries resulted in a further reduction in the 2014 trust fund ratio of 1 percentage

point.

Corresponding estimates of the factors underlying the changes in the financial projections for the DI Trust Fund, and for the OASI and DI Trust Funds

combined, are also shown in table IV.A4. The largest effect on the DI trust

fund ratio at the beginning of 2014 was due to revised economic assumptions, although the change in the valuation period and updates for a variety of

programmatic assumptions have contributed to the total 32 percentage point

reduction.

Note: Totals do not necessarily equal the sums of rounded components.

Table IV.A4.—Reasons for Change in Trust Fund Ratios at the Beginning 

of the Tenth Year of Projection

[In percent]

Item

OASI

Trust Fund

DI

Trust Fund

OASI and DI

Trust Funds,

combined

Trust fund ratio shown in last year’s report for calendar year 2013 492 194 442

Change in trust fund ratio due to changes in: 

Legislation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/

1 Change in trust fund ratio of less than 0.5 percentage point.

1/1 1/1

Valuation period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -6 4

Demographic data and assumptions. . . . . . . . . . . . . . . . . . . . -2 1/1 -2

Economic data and assumptions. . . . . . . . . . . . . . . . . . . . . . . -26 -20 -25

Programmatic data and assumptions . . . . . . . . . . . . . . . . . . . -1 -6 -2

Projection methods and data. . . . . . . . . . . . . . . . . . . . . . . . . . -1 -1 -1

Total change in trust fund ratio . . . . . . . . . . . . . . . . . . . . . . . . . -24 -32 -25

Trust fund ratio shown in this report for calendar year 2014. . . . . 468 162 417
Actuarial Estimates

40

B. LONG-RANGE ESTIMATES

Three types of financial measures are useful in assessing the actuarial status

of the Social Security trust funds under the financing approach specified in

current law: (1) annual cash-flow measures, including income and cost rates,

and balances, (2) trust fund ratios, and (3) summary measures like actuarial

balances and unfunded obligations. The first long-range estimates presented

are the series of projected annual balances (or net cash flow), which are the

differences between the projected annual income rates and annual cost rates.

In assessing the financial condition of the program, particular attention

should be paid to the level of the annual balances at the end of the long-range

period and the time at which the annual balances may change from positive

to negative values. The next measure discussed is the pattern of projected

trust fund ratios. The trust fund ratio represents the proportion of a year’s

projected cost that can be paid with the funds available at the beginning of

the year. Particular attention should be paid to the level and year of maximum trust fund ratio, to the year of exhaustion of the funds, and to stability

of the trust fund ratio in cases where the ratio remains positive at the end of

the long-range period. The final measures discussed in this section summarize the total income and cost over valuation periods that extend through

75 years, and to the infinite horizon. These measures indicate whether projected income will be adequate for the period as a whole. The first such measure, actuarial balance, indicates the size of any shortfall as a percentage of

the taxable payroll over the period. The second, open group unfunded obligation, indicates the size of any shortfall in present-value discounted dollars.

This section also includes a comparison of workers to beneficiaries, a generational decomposition of the infinite future unfunded obligation, the longrange test of close actuarial balance, and the reasons for change in the actuarial balance from the last report.

If the 75-year actuarial balance is zero (or positive), then the trust fund ratio

at the end of the period, by definition, will be at 100 percent (or greater) and

financing for the program is considered to be adequate for the 75-year period

as a whole. (Financial adequacy, or solvency, for each year is determined by

whether the trust fund is zero or positive throughout the year.) Whether or

not financial adequacy is stable in the sense that it is likely to continue for

subsequent 75-year periods in succeeding reports is also important when

considering the actuarial status of the program. One indication of this stability, or sustainable solvency, is the behavior of the trust fund ratio at the end

of the projection period. If trust fund ratios for the last several years of the

long-range period are positive and constant or rising, then it is likely that

subsequent Trustees Reports will also show projections of financial adequacy (assuming no changes in demographic and economic assumptions, or
41

Long-Range Estimates

the law). The actuarial balance and the open group unfunded obligation for

the infinite future provide additional measures of the financial status of the

program for the very long range.

1. Annual Income Rates, Cost Rates, and Balances

Basic to the consideration of the long-range actuarial status of the trust funds

are the concepts of income rate and cost rate, each of which is expressed as a

percentage of taxable payroll. Other measures of the cash flow of the program are shown in appendix F. The annual income rate is the ratio of income

from payroll tax contributions and the taxation of benefits to the OASDI taxable payroll for the year. The OASDI taxable payroll consists of the total

earnings which are subject to OASDI taxes, with some relatively small

adjustments.1 As such, it excludes net investment income and reimbursements from the General Fund of the Treasury for the costs associated with

special monthly payments to certain uninsured persons who attained age 72

before 1968 and who have fewer than 3 quarters of coverage.

The annual cost rate is the ratio of the cost of the program to the taxable payroll for the year. The cost is defined to include scheduled benefit payments,

special monthly payments to certain uninsured persons who have 3 or more

quarters of coverage (and whose payments are therefore not reimbursable

from the General Fund of the Treasury), administrative expenses, net transfers from the trust funds to the Railroad Retirement program under the financial-interchange provisions, and payments for vocational rehabilitation

services for disabled beneficiaries. For any year, the income rate minus the

cost rate is referred to as the balance for the year. (In this context, the term

balance does not represent the assets of the trust funds, which are sometimes

referred to as the balance in the trust funds.)

Table IV.B1 presents a comparison of the estimated annual income rates and

cost rates by trust fund and alternative. Detailed long-range projections of

trust fund operations, in nominal dollar amounts, are shown in table VI.F8.

The projections for OASI under the intermediate assumptions show the

income rate increasing slowly and steadily due to the gradually increasing

effect of the taxation of benefits. The pattern of the cost rate is much different. It is projected to remain fairly stable for the next several years. However,

from about 2010 to 2030 the cost rate increases rapidly as the baby-boom

generation reaches retirement age. Thereafter, the cost rate rises steadily, but

 1 Adjustments are made to include deemed wage credits based on military service for 1983-2001, and to

reflect the lower effective tax rates (as compared to the combined employee-employer rate) which apply to

multiple-employer “excess wages,” and which did apply, before 1984, to net earnings from self-employment

and, before 1988, to income from tips.
Actuarial Estimates

42

slowly, reflecting projected reductions in death rates and continued relatively

low birth rates, reaching 16.57 percent of taxable payroll for 2079. By comparison, the income rate reaches 11.51 percent of taxable payroll for 2079.

Projected income rates under the low cost and high cost sets of assumptions

are very similar to those projected for the intermediate assumptions as they

are largely a reflection of the tax rates specified in the law. OASI cost rates

for the low cost and high cost assumptions differ significantly from those

projected for the intermediate assumptions, but follow generally similar patterns. For the low cost assumptions, the cost rate declines somewhat for the

first 5 years, and then rises, reaching the current level around 2013 and a

peak of 13.09 percent of payroll for 2035. The cost rate then declines gradually, reaching a level of 12.09 percent of payroll for 2079 (at which point the

income rate reaches 11.26 percent). For the high cost assumptions, the cost

rate rises generally throughout the 75-year period. It rises at a relatively fast

pace between 2010 and 2030 because of the aging of the baby-boom generation. During the third 25-year subperiod, the projected cost rate continues rising and reaches 23.33 percent of payroll for 2079.

The pattern of the projected OASI annual balance is important in the analysis

of the financial condition of the program. Under the intermediate assumptions, the annual balance is positive for 13 years (through 2017) and is negative thereafter. This annual deficit rises rapidly, reaching over 2 percent of

taxable payroll by 2025, and continues rising thereafter, to a level of

5.07 percent of taxable payroll for 2079.

Under the low cost assumptions, the projected OASI annual balance is positive for 16 years (through 2020) and thereafter is negative. The annual deficit

under the low cost assumptions rises to a peak of 1.82 percent of taxable payroll for 2035, but declines over the next 15 to 20 years, as the effect of the

baby-boom generation diminishes and the assumed higher fertility rates

increase the size of the work force. The deficit under the low cost assumptions continues to decline, but at a relatively slow pace over the period 2051

through 2079. Under the high cost assumptions, however, the OASI balance

is projected to be positive for only 10 years (through 2014) and to be negative thereafter, with a deficit of 1.80 percent for 2020, 7.12 percent for 2050,

and 11.45 percent of payroll for 2079.
43

Long-Range Estimates

Table IV.B1.—Estimated Annual Income Rates, Cost Rates, and Balances

Calendar Years 1990-2080

[As a percentage of taxable payroll]

Calendar 

year

OASI DI OASDI

Income

rate1 Cost

rate Balance2 Incomerate1 Costrate Balance2 Incomerate1 Costrate Balance2

Historical data:

1990. . . . . 11.32 9.66 1.66 1.17 1.09 0.09 12.49 10.74 1.75

1991. . . . . 11.44 10.15 1.29 1.21 1.18 .03 12.65 11.33 1.32

1992. . . . . 11.43 10.27 1.16 1.21 1.27 -.06 12.64 11.54 1.10

1993. . . . . 11.40 10.37 1.03 1.21 1.35 -.14 12.61 11.73 .88

1994. . . . . 10.70 10.22 .48 1.89 1.40 .49 12.59 11.62 .97

1995. . . . . 10.70 10.22 .48 1.88 1.44 .44 12.59 11.67 .92

1996. . . . . 10.73 10.06 .68 1.89 1.48 .41 12.62 11.53 1.09

1997. . . . . 10.93 9.83 1.09 1.71 1.44 .28 12.64 11.27 1.37

1998. . . . . 10.96 9.45 1.51 1.72 1.42 .30 12.68 10.87 1.80

1999. . . . . 10.99 9.10 1.90 1.72 1.42 .30 12.71 10.51 2.20

2000. . . . . 10.89 8.98 1.91 1.80 1.42 .37 12.69 10.40 2.29

2001. . . . . 10.89 9.08 1.80 1.82 1.48 .34 12.71 10.56 2.15

2002. . . . . 10.92 9.31 1.60 1.82 1.61 .22 12.74 10.92 1.82

2003. . . . . 10.89 9.36 1.53 1.82 1.69 .14 12.71 11.05 1.66

2004. . . . . 10.92 9.35 1.57 1.82 1.79 .03 12.75 11.15 1.60

Intermediate:

2005. . . . . 10.90 9.31 1.59 1.82 1.83 3/ 12.72 11.13 1.59

2006. . . . . 10.90 9.16 1.75 1.82 1.84 -.01 12.73 11.00 1.73

2007. . . . . 10.92 9.09 1.83 1.83 1.86 -.03 12.74 10.95 1.79

2008. . . . . 10.95 9.10 1.86 1.83 1.89 -.06 12.78 10.99 1.80

2009. . . . . 10.94 9.18 1.76 1.83 1.95 -.12 12.77 11.13 1.65

2010. . . . . 10.96 9.30 1.66 1.83 1.95 -.12 12.79 11.25 1.54

2011. . . . . 11.01 9.47 1.54 1.84 1.96 -.12 12.84 11.42 1.42

2012. . . . . 11.03 9.68 1.36 1.84 1.99 -.15 12.87 11.67 1.20

2013. . . . . 11.06 9.92 1.14 1.84 2.01 -.17 12.90 11.93 .97

2014. . . . . 11.07 10.18 .89 1.84 2.03 -.19 12.92 12.21 .71

2015. . . . . 11.09 10.45 .64 1.85 2.04 -.20 12.94 12.49 .45

2020. . . . . 11.18 11.93 -.74 1.85 2.10 -.25 13.03 14.03 -1.00

2025. . . . . 11.27 13.30 -2.03 1.86 2.24 -.39 13.12 15.55 -2.42

2030. . . . . 11.34 14.46 -3.12 1.86 2.28 -.42 13.20 16.74 -3.54

2035. . . . . 11.39 15.09 -3.70 1.86 2.28 -.42 13.24 17.37 -4.13

2040. . . . . 11.40 15.21 -3.81 1.86 2.31 -.45 13.26 17.52 -4.26

2045. . . . . 11.41 15.15 -3.75 1.86 2.39 -.53 13.27 17.55 -4.28

2050. . . . . 11.42 15.21 -3.79 1.86 2.43 -.57 13.28 17.64 -4.36

2055. . . . . 11.43 15.37 -3.94 1.87 2.47 -.61 13.30 17.84 -4.55

2060. . . . . 11.45 15.63 -4.19 1.87 2.47 -.60 13.31 18.10 -4.79

2065. . . . . 11.47 15.92 -4.45 1.87 2.48 -.61 13.33 18.40 -5.07

2070. . . . . 11.48 16.20 -4.72 1.87 2.47 -.61 13.35 18.67 -5.32

2075. . . . . 11.50 16.41 -4.91 1.87 2.49 -.62 13.36 18.90 -5.53

2080. . . . . 11.51 16.62 -5.11 1.87 2.51 -.64 13.38 19.12 -5.75

Year in which cost first exceeds 

tax income 2018 2005 2017

Low Cost:

2005. . . . . 10.90 9.29 1.61 1.82 1.80 .03 12.72 11.08 1.63

2006. . . . . 10.90 9.12 1.79 1.82 1.79 .04 12.73 10.90 1.82

2007. . . . . 10.91 9.00 1.91 1.83 1.78 .04 12.74 10.78 1.96

2008. . . . . 10.95 8.92 2.02 1.83 1.78 .05 12.78 10.70 2.07

2009. . . . . 10.93 8.91 2.02 1.83 1.80 .03 12.76 10.71 2.05

2010. . . . . 10.95 8.94 2.00 1.83 1.77 .06 12.78 10.72 2.06

2011. . . . . 10.99 9.02 1.97 1.83 1.75 .09 12.82 10.77 2.05

2012. . . . . 11.01 9.15 1.86 1.84 1.75 .09 12.85 10.90 1.95

2013. . . . . 11.03 9.32 1.71 1.84 1.73 .10 12.87 11.06 1.81

2014. . . . . 11.04 9.51 1.53 1.84 1.72 .11 12.88 11.24 1.65
Actuarial Estimates

44

Notes:

1. The income rate excludes interest income and certain transfers from the General Fund of the Treasury.

2. Some historical values are subject to change due to revisions of taxable payroll.

3. Totals do not necessarily equal the sums of rounded components.

Low Cost (cont.):

2015. . . . . 11.06 9.73 1.33 1.84 1.72 0.12 12.90 11.44 1.45

2020. . . . . 11.13 10.93 .20 1.84 1.70 .14 12.97 12.63 .34

2025. . . . . 11.20 12.01 -.81 1.84 1.75 .09 13.04 13.77 -.72

2030. . . . . 11.25 12.82 -1.56 1.84 1.73 .11 13.10 14.55 -1.45

2035. . . . . 11.28 13.09 -1.82 1.84 1.71 .14 13.12 14.80 -1.68

2040. . . . . 11.28 12.90 -1.62 1.84 1.70 .14 13.12 14.60 -1.48

2045. . . . . 11.27 12.59 -1.33 1.85 1.74 .10 13.11 14.33 -1.22

2050. . . . . 11.26 12.40 -1.14 1.85 1.75 .10 13.11 14.14 -1.04

2055. . . . . 11.26 12.31 -1.05 1.85 1.75 .09 13.11 14.06 -.95

2060. . . . . 11.26 12.29 -1.03 1.85 1.73 .11 13.11 14.02 -.91

2065. . . . . 11.26 12.24 -.98 1.85 1.73 .12 13.11 13.97 -.86

2070. . . . . 11.26 12.18 -.92 1.85 1.73 .12 13.11 13.91 -.80

2075. . . . . 11.26 12.10 -.84 1.85 1.74 .10 13.11 13.84 -.74

2080. . . . . 11.26 12.09 -.83 1.85 1.76 .09 13.11 13.85 -.74

Year in which cost first exceeds 

tax income 2021 4/ 2022

High Cost:

2005. . . . . 10.90 9.53 1.37 1.82 1.93 -.11 12.73 11.47 1.26

2006. . . . . 10.91 9.43 1.48 1.83 2.00 -.17 12.74 11.43 1.31

2007. . . . . 10.93 9.42 1.51 1.83 2.08 -.25 12.76 11.50 1.26

2008. . . . . 10.97 9.52 1.45 1.83 2.17 -.34 12.81 11.69 1.11

2009. . . . . 10.96 9.66 1.30 1.84 2.29 -.45 12.79 11.95 .85

2010. . . . . 10.98 9.82 1.17 1.84 2.31 -.47 12.82 12.13 .69

2011. . . . . 11.03 10.08 .95 1.84 2.35 -.51 12.88 12.44 .44

2012. . . . . 11.07 10.40 .67 1.85 2.42 -.57 12.92 12.81 .10

2013. . . . . 11.10 10.70 .40 1.85 2.45 -.60 12.95 13.15 -.20

2014. . . . . 11.11 11.03 .08 1.85 2.49 -.64 12.97 13.52 -.55

2015. . . . . 11.14 11.34 -.20 1.86 2.52 -.66 12.99 13.85 -.86

2020. . . . . 11.24 13.05 -1.80 1.86 2.63 -.77 13.10 15.68 -2.57

2025. . . . . 11.34 14.69 -3.35 1.87 2.82 -.95 13.21 17.51 -4.30

2030. . . . . 11.44 16.24 -4.80 1.87 2.90 -1.02 13.31 19.13 -5.82

2035. . . . . 11.51 17.30 -5.79 1.88 2.93 -1.05 13.38 20.22 -6.84

2040. . . . . 11.55 17.87 -6.32 1.88 2.99 -1.11 13.43 20.86 -7.44

2045. . . . . 11.58 18.24 -6.66 1.88 3.14 -1.26 13.46 21.38 -7.92

2050. . . . . 11.61 18.73 -7.12 1.89 3.24 -1.35 13.50 21.97 -8.47

2055. . . . . 11.65 19.34 -7.69 1.89 3.34 -1.45 13.54 22.68 -9.14

2060. . . . . 11.69 20.11 -8.42 1.89 3.37 -1.48 13.58 23.48 -9.90

2065. . . . . 11.74 21.00 -9.25 1.89 3.41 -1.52 13.64 24.41 -10.77

2070. . . . . 11.80 21.92 -10.12 1.89 3.40 -1.51 13.69 25.32 -11.63

2075. . . . . 11.84 22.74 -10.90 1.89 3.42 -1.52 13.74 26.16 -12.42

2080. . . . . 11.89 23.47 -11.58 1.89 3.43 -1.54 13.78 26.90 -13.12

Year in which cost first exceeds 

tax income 2015 2005 2013

1 Historical income rates are modified to include adjustments to the lump-sum payments received in 1983

from the General Fund of the Treasury for the cost of noncontributory wage credits for military service in

1940-56.

2 The years for which the annual balances are projected under the intermediate assumptions to become permanently negative are 2018, 2005, and 2017 for the OASI, DI, and the combined funds, respectively. Under

the high cost assumptions the corresponding years are 2015, 2005, and 2013. Under the low cost assumptions, annual balances for the OASI and the combined funds are projected to become permanently negative in

2021 and 2022 respectively. Under the low cost projection the annual balance for the DI fund is projected to

be positive throughout the 75-year projection period.

3 Between -0.005 and 0.005 percent of taxable payroll.

4 Tax income is projected to exceed cost throughout the projection period.

Table IV.B1.—Estimated Annual Income Rates, Cost Rates, and Balances

Calendar Years 1990-2080 (Cont.)

[As a percentage of taxable payroll]

Calendar 

year

OASI DI OASDI

Income

rate1 Costrate Balance2 Incomerate1 Costrate Balance2 Incomerate1 Costrate Balance2
45

Long-Range Estimates

Under the intermediate assumptions, the cost rate for DI generally increases

over the long-range period from 1.83 percent of taxable payroll for 2005,

reaching 2.51 for 2079. The income rate increases only very slightly from

1.82 percent of taxable payroll for 2005 to 1.87 percent for 2079. The annual

balance is a very small negative in 2005, and the annual deficit reaches

0.64 percent for 2079.

Under the low cost assumptions, the DI cost rate is fairly stable over the

long-range period, reaching 1.76 percent for 2079. The annual balance is

positive throughout the long-range period. For the high cost assumptions, DI

cost rises much more, reaching 3.43 percent for 2079. Annual deficits begin

in 2005 and reach 1.53 percent for 2079.

Figure IV.B1 shows in graphical form the patterns of the OASI and DI

annual income rates and cost rates. The income rates shown here are only for

alternative II in order to simplify the graphical presentation because, as

shown in table IV.B1, the variation in the income rates by alternative is very

small. Income rates increase generally, but at a slow rate for each of the alternatives over the long-range period. Both increases in the income rate and

variation among the alternatives result from the relatively small component

of income from taxation of benefits. Increases in income from taxation of

benefits reflect increases in the total amount of benefits paid and the fact that

an increasing share of individual benefits will be subject to taxation, because

benefit taxation threshold amounts are not indexed.

The patterns of the annual balances for OASI and DI are suggested by figure

IV.B1. For each alternative, the magnitude of each of the positive balances in

the early years, as a percent of taxable payroll, is represented by the distance

between the appropriate cost-rate curve and the income-rate curve above it.

The magnitude of each of the deficits in subsequent years is represented by

the distance between the appropriate cost-rate curve and the income-rate

curve below it.

In the future, the cost of OASI, DI and the combined OASDI programs as a

percent of taxable payroll will not necessarily be within the range encompassed by alternatives I and III. Nonetheless, because alternatives I and III

define a reasonably wide range of demographic and economic conditions, the

resulting estimates delineate a reasonable range for consideration of potential

future program costs.
Actuarial Estimates

46

The cost of the OASDI program has been discussed in this section in relation

to taxable payroll, which is a program-related concept that is very useful in

analyzing the financial status of the OASDI program. The cost can also be

discussed in relation to broader economic concepts, such as the gross domestic product (GDP). OASDI outlays generally rise from about 4.3 percent of

GDP currently to about 6.4 percent of GDP by the end of the 75-year projection period under alternative II. Discussion of both the cost and the taxable

payroll of the OASDI program in relation to GDP is presented in appendix

VI.F.2 beginning on page 169.

2. Comparison of Workers to Beneficiaries

The primary reason that the estimated OASDI cost rate increases rapidly

after 2010 is that the number of beneficiaries is projected to increase more

rapidly than the number of covered workers. This occurs because the relatively large number of persons born during the baby-boom will reach retirement age, and begin to receive benefits, while the relatively small number of

persons born during the subsequent period of low fertility rates will comprise

the labor force. A comparison of the numbers of covered workers and beneficiaries is shown in table IV.B2.

 Figure IV.B1.—Long-Range OASI and DI Annual Income Rates and Cost Rates

[As a percentage of taxable payroll]

0%

5%

10%

15%

20%

25%

1990 2000 2010 2020 2030 2040 2050 2060 2070 2080

Calendar year

Income rates

OASI cost rates

DI cost rates

Historical Estimated

OASI

DI III

II

I

III

II

I
47

Long-Range Estimates

Table IV.B2.—Covered Workers and Beneficiaries, Calendar Years 1945-2080

Calendar year

Covered

workers1

(in thousands)

Beneficiaries2 (in thousands)

Covered

workers per

OASDI

beneficiary

Beneficiaries

per 100

covered

OASI DI OASDI workers

Historical data:

1945 . . . . . . . . . 46,390 1,106 — 1,106 41.9 2

1950 . . . . . . . . . 48,280 2,930 — 2,930 16.5 6

1955 . . . . . . . . . 65,200 7,563 — 7,563 8.6 12

1960 . . . . . . . . . 72,530 13,740 522 14,262 5.1 20

1965 . . . . . . . . . 80,680 18,509 1,648 20,157 4.0 25

1970 . . . . . . . . . 93,090 22,618 2,568 25,186 3.7 27

1975 . . . . . . . . . 100,200 26,998 4,125 31,123 3.2 31

1980 . . . . . . . . . 113,649 30,384 4,734 35,117 3.2 31

1985 . . . . . . . . . 120,565 32,776 3,874 36,650 3.3 30

1990 . . . . . . . . . 133,672 35,266 4,204 39,471 3.4 30

1991 . . . . . . . . . 132,969 35,786 4,388 40,174 3.3 30

1992 . . . . . . . . . 133,890 36,313 4,716 41,029 3.3 31

1993 . . . . . . . . . 136,117 36,757 5,083 41,840 3.3 31

1994 . . . . . . . . . 138,681 37,082 5,435 42,517 3.3 31

1995 . . . . . . . . . 140,981 37,376 5,731 43,107 3.3 31

1996 . . . . . . . . . 143,427 37,521 5,977 43,498 3.3 30

1997 . . . . . . . . . 146,279 37,705 6,087 43,792 3.3 30

1998 . . . . . . . . . 149,146 37,825 6,250 44,075 3.4 30

1999 . . . . . . . . . 151,957 37,934 6,433 44,366 3.4 29

2000 . . . . . . . . . 154,732 38,560 6,606 45,166 3.4 29

2001 . . . . . . . . . 155,130 38,888 6,780 45,668 3.4 29

2002 . . . . . . . . . 154,488 39,116 7,060 46,176 3.3 30

2003 . . . . . . . . . 154,471 39,314 7,438 46,752 3.3 30

2004 . . . . . . . . . 156,522 39,557 7,810 47,367 3.3 30

Intermediate:

2005 . . . . . . . . . 158,718 39,882 8,111 47,993 3.3 30

2010 . . . . . . . . . 166,717 43,200 9,405 52,604 3.2 32

2015 . . . . . . . . . 171,806 49,397 10,308 59,705 2.9 35

2020 . . . . . . . . . 176,049 57,052 10,925 67,977 2.6 39

2025 . . . . . . . . . 178,705 64,523 11,883 76,406 2.3 43

2030 . . . . . . . . . 181,110 71,212 12,312 83,524 2.2 46

2035 . . . . . . . . . 183,745 75,783 12,600 88,384 2.1 48

2040 . . . . . . . . . 186,581 78,104 12,973 91,077 2.0 49

2045 . . . . . . . . . 189,424 79,691 13,593 93,284 2.0 49

2050 . . . . . . . . . 191,869 81,384 13,956 95,340 2.0 50

2055 . . . . . . . . . 194,242 83,465 14,335 97,800 2.0 50

2060 . . . . . . . . . 196,467 85,902 14,487 100,389 2.0 51

2065 . . . . . . . . . 198,685 88,461 14,729 103,189 1.9 52

2070 . . . . . . . . . 200,774 90,957 14,871 105,828 1.9 53

2075 . . . . . . . . . 202,888 93,104 15,141 108,246 1.9 53

2080 . . . . . . . . . 204,901 95,247 15,393 110,640 1.9 54

Low Cost:

2005 . . . . . . . . . 158,886 39,828 8,068 47,895 3.3 30

2010 . . . . . . . . . 168,648 43,100 8,895 51,995 3.2 31

2015 . . . . . . . . . 175,442 49,144 9,231 58,375 3.0 33

2020 . . . . . . . . . 180,774 56,447 9,479 65,926 2.7 36

2025 . . . . . . . . . 184,732 63,466 10,011 73,477 2.5 40

2030 . . . . . . . . . 188,826 69,550 10,164 79,713 2.4 42

2035 . . . . . . . . . 193,719 73,428 10,326 83,754 2.3 43

2040 . . . . . . . . . 199,407 75,072 10,632 85,704 2.3 43

2045 . . . . . . . . . 205,599 76,183 11,176 87,360 2.4 42

2050 . . . . . . . . . 211,914 77,583 11,542 89,125 2.4 42

2055 . . . . . . . . . 218,423 79,542 11,961 91,503 2.4 42

2060 . . . . . . . . . 225,177 81,889 12,250 94,139 2.4 42

2065 . . . . . . . . . 232,445 84,282 12,661 96,943 2.4 42

2070 . . . . . . . . . 240,013 86,617 13,070 99,687 2.4 42

2075 . . . . . . . . . 247,830 88,910 13,625 102,534 2.4 41

2080 . . . . . . . . . 255,725 91,673 14,167 105,840 2.4 41
Actuarial Estimates

48

Notes: 

1. The number of beneficiaries does not include uninsured individuals who receive benefits under Section

228 of the Social Security Act. Costs are reimbursed from the General Fund of the Treasury for most of

these individuals.

2. Historical covered worker data are subject to revision.

3. Totals do not necessarily equal the sums of rounded components.

The impact of the demographic shifts under the three alternatives on the

OASDI cost rates is readily seen by considering the projected number of

beneficiaries per 100 workers. As compared to the 2004 level of 30 beneficiaries per 100 covered workers, this ratio is estimated to rise significantly

by 2080 to 41 under the low cost assumptions, 54 under the intermediate

assumptions, and 71 under the high cost assumptions. The significance of

these numbers can be seen by comparing figure IV.B1 to figure IV.B2.

For each alternative, the shape of the curve in figure IV.B2, which shows

beneficiaries per 100 covered workers, is strikingly similar to that of the corresponding cost-rate curve in figure IV.B1, thereby emphasizing the extent to

which the cost of the OASDI program as a percentage of taxable payroll is

determined by the age distribution of the population. Because the cost rate is

basically the product of the number of beneficiaries and their average benefit, divided by the product of the number of covered workers and their average taxable earnings (and because average benefits rise at about the same

rate as average earnings), it is to be expected that the pattern of the annual

cost rates is similar to that of the annual ratios of beneficiaries to workers.

High Cost:

2005 . . . . . . . . . 156,954 39,835 8,207 48,043 3.3 31

2010 . . . . . . . . . 163,502 43,199 10,566 53,765 3.0 33

2015 . . . . . . . . . 168,532 49,729 11,739 61,468 2.7 36

2020 . . . . . . . . . 172,199 57,804 12,766 70,570 2.4 41

2025 . . . . . . . . . 174,255 65,854 14,066 79,921 2.2 46

2030 . . . . . . . . . 175,731 73,378 14,659 88,037 2.0 50

2035 . . . . . . . . . 176,948 78,959 15,023 93,982 1.9 53

2040 . . . . . . . . . 177,710 82,324 15,443 97,766 1.8 55

2045 . . . . . . . . . 178,048 84,811 16,138 100,949 1.8 57

2050 . . . . . . . . . 177,606 87,264 16,498 103,762 1.7 58

2055 . . . . . . . . . 176,801 89,915 16,834 106,748 1.7 60

2060 . . . . . . . . . 175,673 92,882 16,826 109,708 1.6 62

2065 . . . . . . . . . 174,116 96,017 16,839 112,856 1.5 65

2070 . . . . . . . . . 172,352 99,066 16,626 115,692 1.5 67

2075 . . . . . . . . . 170,372 101,467 16,504 117,971 1.4 69

2080 . . . . . . . . . 168,343 103,404 16,374 119,778 1.4 71

1 Workers who are paid at some time during the year for employment on which OASDI taxes are due.

2 Beneficiaries with monthly benefits in current-payment status as of June 30.

Table IV.B2.—Covered Workers and Beneficiaries, Calendar Years 1945-2080 (Cont.)

Calendar year

Covered

workers1

(in thousands)

Beneficiaries2 (in thousands)

Covered

workers per

OASDI

beneficiary

Beneficiaries

per 100

covered

OASI DI OASDI workers
49

Long-Range Estimates

Table IV.B2 also shows that the number of covered workers per beneficiary,

which was about 3.3 in 2004, is estimated to decline in the future. Based on

the intermediate assumptions, the ratio declines to 2.1 by 2031, and 1.9

workers per beneficiary by 2062. Based on the low cost assumptions, for

which high fertility rates and small reductions in death rates are assumed, the

ratio declines to 2.3 by 2032, and then rises back to a level of 2.4 by 2045.

Based on the high cost assumptions, for which low fertility rates and large

reductions in death rates are assumed, the decline is much greater, reaching

1.8 by 2038, and 1.4 workers per beneficiary by 2075.

3. Trust Fund Ratios

Trust fund ratios are useful indicators of the adequacy of the financial

resources of the Social Security program at any point in time. For any year in

which the projected trust fund ratio is positive (i.e., the trust fund holds

assets at the beginning of the year), but is not positive for the following year

the trust fund is projected to become exhausted during the year. Under

present law, the OASI and DI Trust Funds do not currently have the authority

to borrow. Therefore, exhaustion of the assets in either fund during a year

would mean there are no longer sufficient assets in the fund to cover the full

amount of benefits scheduled for the year under present law.

The trust fund ratio also serves an additional important purpose in assessing

the actuarial status of the program. When the financing is adequate for the

 Figure IV.B2.—Number of OASDI Beneficiaries Per 100 Covered Workers

0

10

20

30

40

50

60

70

80

90

100

1990 2000 2010 2020 2030 2040 2050 2060 2070 2080

Calendar year

Historical Estimated

III

II

I
Actuarial Estimates

50

timely payment of full benefits throughout the long-range period, the stability of the trust fund ratio toward the end of the period indicates the likelihood

that this projected adequacy will continue for subsequent Trustees Reports. If

the trust fund ratio toward the end of the period is level (or increasing), then

projected adequacy for the long-range period is likely to continue for subsequent reports.

Table IV.B3 shows, by alternative, the estimated trust fund ratios (without

regard to advance tax transfers that would be effected after the end of the

10-year, short-range period) for the separate and combined OASI and DI

Trust Funds. Also shown in this table is the year in which a fund is estimated

to become exhausted, reflecting the effect of the provision for advance tax

transfers. The patterns of the OASI and DI trust fund ratios, over the 75-year

period, are shown graphically in figure IV.B3 for all three sets of assumptions. A graphical presentation of the combined OASDI ratios is shown in

figure II.D7 on page 15.

Based on the intermediate assumptions, the OASI trust fund ratio rises

steadily from 341 percent at the beginning of 2005, reaching a peak of

469 percent at the beginning of 2015. This increase in the OASI trust fund

ratio results from the fact that the annual income rate (which excludes interest) exceeds annual outgo for several years (see table IV.B1). Thereafter, the

OASI trust fund ratio declines steadily, with the OASI Trust Fund becoming

exhausted in 2043. The DI trust fund ratio follows a pattern that is similar but

unfolds more rapidly. The DI trust fund ratio is estimated to peak at

215 percent at the beginning of 2005, declining thereafter until becoming

exhausted in 2027.

The trust fund ratio for the combined OASI and DI Trust Funds rises from

320 percent for 2005 to a peak of 418 percent at the beginning of 2015.

Thereafter, the ratio declines, with the combined funds becoming exhausted

in 2041. Based on the intermediate estimates in last year’s report, the peak

fund ratio for the combined funds was estimated to be 448 percent for 2015

and the year of exhaustion was estimated to be 2042.

The trust fund ratio for the OASDI program first declines in 2016, about

1 year before annual expenditures begin to exceed noninterest income. This

occurs because the increase in trust fund assets during 2015, which reflects

interest income and a small excess of noninterest income over cost, occurs at

a slower rate than does the increase in the annual cost of the program

between 2015 and 2016.

After 2015 the dollar amount of assets is projected to continue to rise through

the beginning of 2027 because interest income more than offsets the shortfall

in noninterest income. Beginning in 2017, the OASDI program is projected
51

Long-Range Estimates

to experience increasingly large cash-flow shortfalls that will require the

trust funds to redeem special public-debt obligations of the General Fund of

the Treasury. This will differ from the experience of recent years when the

trust funds have been net lenders to the General Fund of the Treasury. The

change in the cash flow between the trust funds and the general fund is

expected to have important public policy and economic implications that go

well beyond the operation of the OASDI program itself.

Based on the low cost assumptions, the trust fund ratio for the DI program

increases throughout the long-range projection period, reaching the

extremely high level of 1,401 percent for 2080. At the end of the long-range

period, the DI trust fund ratio is rising by 23 percentage points per year.

Thus, subsequent reports are likely to contain projections of adequate longrange financing of the DI program under a similar optimistic set of assumptions. For the OASI program, the trust fund ratio rises to a peak of

551 percent for 2019, dropping thereafter to a level of 333 percent by 2080.

At the end of the period the OASI trust fund ratio is declining by 3 percentage points per year. The long-term outlook for the DI program is improved

more than for the OASI program largely because lower assumed disability

incidence rates have a substantial effect on the DI program but little net

effect on the OASI program. For the OASDI program, the trust fund ratio

peaks at 523 percent for 2021, and then generally falls to 468 percent for

2080, and is rising by 1 percentage point per year. Thus, due to the size of the

trust fund ratios and their near stability, subsequent Trustees Reports are

likely to contain projections of adequate long-range financing of the OASI

and combined OASI and DI program under the low cost assumptions. A stable trust fund ratio at the end of the valuation period indicates that the actuarial balance for Trustees Reports in subsequent years can be expected to

remain about the same as long as assumptions are realized.

In contrast, under the high cost assumptions, the OASI trust fund ratio is estimated to peak at 395 percent for 2009, thereafter declining to fund exhaustion by the end of 2033. The DI trust fund ratio is estimated to peak at

209 percent for 2005, thereafter declining to fund exhaustion by the end of

2014. The combined OASDI trust fund ratio is estimated to rise to a peak of

347 percent for 2008, declining thereafter to fund exhaustion by the end of

2030.

Thus, because large ultimate cost rates are projected under all but the low

cost assumptions, it is likely that income will eventually need to be

increased, and/or program costs will need to be reduced in order to prevent

the trust funds from becoming exhausted.

Even under the high cost assumptions, however, the combined OASI and DI

funds on hand plus their estimated future income would be able to cover their
Actuarial Estimates

52

combined cost for 25 years into the future (until 2030). Under the intermediate assumptions the combined starting funds plus estimated future income

would be able to cover cost for about 36 years into the future (until 2041).

The program would be able to cover cost for the foreseeable future under the

more optimistic low cost assumptions. In the 2004 report, the combined trust

funds were projected to become exhausted in 2031 under the high cost

assumptions and in 2042 under the intermediate assumptions.

.

Note: See definition of trust fund ratio on page 206. The combined ratios shown for years after the DI fund is

estimated to be exhausted are theoretical and are shown for informational purposes only.

A graphic illustration of the trust fund ratios for the separate OASI and DI

Trust Funds is shown in figure IV.B3 for each of the alternative sets of

assumptions. A graphic illustration of the trust fund ratios for the combined

trust funds is shown in figure II.D7.

Table IV.B3.—Estimated Trust Fund Ratios, Calendar Years 2005-80

[In percent]

Calendar

year

Intermediate Low Cost High Cost

OASI DI OASDI OASI DI OASDI OASI DI OASDI

2005 . . . . . . . . . . . . . 341 215 320 341 219 321 341 209 318

2006 . . . . . . . . . . . . . 362 213 337 364 221 340 358 196 330

2007 . . . . . . . . . . . . . 384 211 355 388 224 361 374 180 339

2008 . . . . . . . . . . . . . 404 206 370 413 227 382 389 163 347

2009 . . . . . . . . . . . . . 422 197 383 437 227 401 395 139 346

2010 . . . . . . . . . . . . . 437 192 394 458 233 421 394 116 341

2011 . . . . . . . . . . . . . 449 186 404 478 241 440 394 93 337

2012 . . . . . . . . . . . . . 458 178 410 496 248 456 394 70 333

2013 . . . . . . . . . . . . . 464 171 415 511 257 471 395 46 330

2014 . . . . . . . . . . . . . 468 162 417 523 267 484 392 22 324

2015 . . . . . . . . . . . . . 469 154 418 533 277 495 387 1/1 316

2020 . . . . . . . . . . . . . 443 106 393 550 338 522 327 1/1 249

2025 . . . . . . . . . . . . . 381 39 332 534 393 516 226 1/1 144

2030 . . . . . . . . . . . . . 292 1/

1 The trust fund is estimated to be exhausted by the beginning of this year. The last line of the table shows the

specific year of trust fund exhaustion.

245 498 456 493 97 1/1 10

2035 . . . . . . . . . . . . . 187 1/1 143 459 538 468 1/1 1/1 1/1

2040 . . . . . . . . . . . . . 74 1/1 31 432 623 454 1/1 1/1 1/1

2045 . . . . . . . . . . . . . 1/1 1/1 1/1 415 692 448 1/1 1/1 1/1

2050 . . . . . . . . . . . . . 1/1 1/1 1/1 402 772 447 1/1 1/1 1/1

2055 . . . . . . . . . . . . . 1/1 1/1 1/1 390 855 448 1/1 1/1 1/1

2060 . . . . . . . . . . . . . 1/1 1/1 1/1 376 959 448 1/1 1/1 1/1

2065 . . . . . . . . . . . . . 1/1 1/1 1/1 363 1,066 450 1/1 1/1 1/1

2070 . . . . . . . . . . . . . 1/1 1/1 1/1 352 1,181 455 1/1 1/1 1/1

2075 . . . . . . . . . . . . . 1/1 1/1 1/1 342 1,289 461 1/1 1/1 1/1

2080 . . . . . . . . . . . . . 1/1 1/1 1/1 333 1,401 468 1/1 1/1 1/1

Trust fund is estimated to become

exhausted in. . . . . 2043 2027 2041 2/

2 The fund is not estimated to be exhausted within the projection period.

2/1 2/1 2033 2014 2030
53

Long-Range Estimates

4. Summarized Income Rates, Cost Rates, and Balances

Summarized income and cost rates, along with their components, are presented in table IV.B4 for 25-year, 50-year, and 75-year valuation periods.

Income rates reflect the scheduled payroll tax rates and the projected income

from the taxation of scheduled benefits expressed as a percentage of taxable

payroll. The current combined payroll tax rate of 12.4 is scheduled to remain

unchanged in the future. In contrast, the projected income from taxation of

benefits, expressed as a percent of taxable payroll, is expected to increase

continually throughout the long-range period. This is because increasing

income from taxation of benefits reflects not only rising benefit and income

levels, but also the fact that benefit-taxation threshold amounts are not

indexed. Summarized income rates also include the starting trust fund balance. Summarized cost rates include the cost of reaching a target trust fund

of 100 percent of annual cost at the end of the period in addition to the cost

included in the annual cost rates.

It may be noted that the payroll tax income expressed as a percentage of taxable payroll is slightly smaller than the actual tax rates in effect for each

period. This results from the fact that all OASDI income and cost amounts

presented in this report are computed on a cash basis, i.e., amounts are attributed to the year in which they are actually received by, or expended (payable) from, the fund, while taxable payroll is attributed to the year in which

 Figure IV.B3.—Long-Range OASI and DI Trust Fund Ratios

[Assets as a percentage of annual expenditures]

0%

200%

400%

600%

800%

1,000%

1,200%

1,400%

1990 2000 2010 2020 2030 2040 2050 2060 2070 2080

Calendar year

OASI

DI

Historical Estimated

III II

I

I

III II
Actuarial Estimates

54

earnings are paid. Because earnings are paid to workers before the corresponding payroll taxes are credited to the funds, payroll tax income for a particular year reflects a combination of the taxable payrolls from that year and

from prior years, when payroll was smaller. Dividing payroll tax income by

taxable payroll for a particular year, or period of years, will thus generally

result in an income rate that is slightly less than the applicable tax rate for the

period.

Summarized values for the full 75-year period are useful in analyzing the

long-range adequacy of financing for the program over the period as a whole

under present law and under proposed modifications to the law. 

Table IV.B4 shows summarized rates for valuation periods of the first 25, the

first 50, and the entire 75 years of the long-range projection period, including

the funds on hand at the start of the period and the cost of accumulating a target trust fund balance equal to 100 percent of annual cost by the end of the

period. The actuarial balance for each of these three valuation periods is

equal to the difference between the summarized income rate and the summarized cost rate for the corresponding period. An actuarial balance of zero for

any period would indicate that estimated cost for the period could be met, on

average, with a remaining trust fund balance at the end of the period equal to

100 percent of the following year’s cost. A negative actuarial balance indicates that, over the period, the present value of income to the program plus

the existing trust fund falls short of the present value of the cost of the program plus the cost of reaching a target trust fund balance of 1 year’s cost by

the end of the period. Combined with a falling trust fund ratio, this signals

the possibility of continuing cash-flow deficits, implying that the current-law

level of financing is not sustainable.

The values in table IV.B4 show that the combined OASDI program is

expected to operate with a positive actuarial balance over the 25-year valuation period under the low cost and intermediate assumptions. For the 25-year

valuation period the summarized values indicate actuarial balances of

1.94 percent of taxable payroll under the low cost assumptions, 0.83 percent

under the intermediate assumptions, and -0.60 percent under the high cost

assumptions. Thus, the program is more than adequately financed for the

25-year valuation period under all but the high cost projections. For the

50-year valuation period the OASDI program would have a positive actuarial

balance of 0.67 percent under the low cost assumptions, but would have deficits of 1.13 percent under the intermediate assumptions and 3.40 percent

under the high cost assumptions. Thus, the program is more than adequately

financed for the 50-year valuation period under only the low cost set of

assumptions.
55

Long-Range Estimates

For the entire 75-year valuation period, the combined OASDI program

would again have actuarial deficits except under the low cost set of assumptions. The actuarial balance for this long-range valuation period is projected

to be 0.38 percent of taxable payroll under the low cost assumptions,

-1.92 percent under the intermediate assumptions, and -4.96 percent under

the high cost assumptions.

Assuming the Trustees’ intermediate assumptions are realized, the deficit of

1.92 percent of payroll indicates that financial adequacy of the program for

the next 75 years could be restored if the Social Security payroll tax were

immediately and permanently increased from its current level of 12.4 percent

(combined employee-employer shares) to 14.32 percent. Alternatively, all

current and future benefits could be reduced by 12.8 percent (or there could

be some combination of tax increases and benefit reductions). Changes of

this magnitude would be sufficient to eliminate the actuarial deficit over the

75-year projection period. However, because of the projected increase in the

average age of the population, projected annual deficits begin in 2017 and

increase to levels nearly 6 percent of taxable payroll by the end of the

75-year period.

The large annual deficits at the end of the projection period indicate that the

annual cost will very likely continue to exceed tax revenues after 2079 under

the intermediate assumptions. As a result, ensuring the sustainability of the

system would eventually require larger changes than those needed to restore

actuarial balance for the 75-year period. For the infinite future, the actuarial

deficit is estimated to be 3.5 percent of taxable payroll under the intermediate assumptions. This means that financial adequacy of the OASDI program

could be restored permanently if the combined payroll tax rate were immediately and permanently raised from 12.4 percent to about 15.9 percent, or if

all current and future benefits were immediately reduced by 22 percent.

As may be concluded from table IV.B4, the financial condition of the DI program is substantially weaker than that of the OASI program for the first

25 years. Summarized over the full 75-year period, however, long-range deficits for the OASI and DI programs under intermediate assumptions are more

similar, relative to the level of program costs.
Actuarial Estimates

56

.

Note: Totals do not necessarily equal the sums of rounded components.

Table IV.B5 presents the components and the calculation of the long-range

(75-year) actuarial balance under the intermediate assumptions. The present

value of future cost less future tax income over the long-range period, minus

the amount of trust fund assets at the beginning of the projection period,

amounts to $4.0 trillion. This amount is referred to as the 75-year “open

group unfunded obligation.” The actuarial deficit (i.e., the negative of the

actuarial balance) combines this unfunded obligation with the present value

of the “ending target trust fund,” and expresses the total as a percentage of

the present value of the taxable payroll for the period. The present value of

Table IV.B4.—Components of Summarized Income Rates and Cost Rates, 

Calendar Years 2005-79

[As a percentage of taxable payroll]

Valuation period

Income rate Cost rate

Actuarial

balance

Payroll

tax

Taxation

of

benefits

Beginning

fund

balance Total

Disbursements

Ending

fund

balance Total

OASI:

Intermediate:

2005-29. . . . . 10.59 0.51 1.44 12.53 11.09 0.49 11.59 0.95

2005-54. . . . . 10.59 .63 .85 12.06 12.73 .21 12.93 -.87

2005-79. . . . . 10.59 .68 .67 11.93 13.42 .12 13.53 -1.60

Low Cost:

2005-29. . . . . 10.59 .47 1.43 12.49 10.33 .43 10.76 1.73

2005-54. . . . . 10.59 .55 .85 11.98 11.32 .17 11.49 .49

2005-79. . . . . 10.59 .57 .66 11.82 11.52 .09 11.61 .21

High Cost:

2005-29. . . . . 10.58 .56 1.44 12.58 12.03 .57 12.60 -.02

2005-54. . . . . 10.59 .72 .84 12.14 14.46 .27 14.73 -2.58

2005-79. . . . . 10.59 .81 .66 12.06 15.91 .16 16.07 -4.01

DI:

Intermediate:

2005-29. . . . . 1.80 .04 .18 2.02 2.06 .08 2.14 -.12

2005-54. . . . . 1.80 .05 .11 1.95 2.18 .03 2.21 -.26

2005-79. . . . . 1.80 .05 .08 1.94 2.24 .02 2.26 -.32

Low Cost:

2005-29. . . . . 1.80 .04 .18 2.01 1.74 .06 1.80 .21

2005-54. . . . . 1.80 .04 .10 1.94 1.74 .02 1.76 .18

2005-79. . . . . 1.80 .04 .08 1.92 1.74 .01 1.75 .17

High Cost:

2005-29. . . . . 1.80 .05 .18 2.03 2.51 .10 2.61 -.58

2005-54. . . . . 1.80 .07 .10 1.97 2.74 .05 2.78 -.82

2005-79. . . . . 1.80 .07 .08 1.95 2.88 .02 2.90 -.95

OASDI:

Intermediate:

2005-29. . . . . 12.38 .55 1.61 14.55 13.15 .57 13.72 .83

2005-54. . . . . 12.39 .68 .96 14.02 14.90 .24 15.15 -1.13

2005-79. . . . . 12.39 .73 .75 13.87 15.66 .13 15.79 -1.92

Low Cost:

2005-29. . . . . 12.39 .51 1.61 14.50 12.07 .49 12.56 1.94

2005-54. . . . . 12.39 .59 .95 13.93 13.06 .19 13.25 .67

2005-79. . . . . 12.39 .62 .74 13.74 13.26 .10 13.36 .38

High Cost:

2005-29. . . . . 12.38 .61 1.62 14.61 14.54 .67 15.21 -.60

2005-54. . . . . 12.38 .78 .94 14.11 17.20 .31 17.51 -3.40

2005-79. . . . . 12.38 .88 .74 14.01 18.78 .19 18.97 -4.96
57

Long-Range Estimates

future tax income minus cost, plus starting trust fund assets, minus the

present value of the ending target trust fund amounts to -$4.3 trillion.

Expressed as a percentage of taxable payroll for the period, this is the actuarial balance of -1.92 percent.

Note: Totals do not necessarily equal the sums of rounded components.

5. Additional Measures of OASDI Unfunded Obligations

As shown in the previous section, a negative actuarial balance (or an actuarial deficit) provides one measure of the unfunded obligation of the program

over a period of time. Two additional measures of OASDI unfunded obligations under the intermediate assumptions are presented below.

a. Open Group Unfunded Obligations

Consistent with practice since 1965, this report focuses on the 75-year period

(from 2005 to 2079 for this report) for the evaluation of the long-run financial status of the OASDI program on an open group basis (i.e., including

taxes and cost for past, current and future participants through the year

2079). Table IV.B6, in its second line, shows that the present value of the

open group unfunded obligation for the program over that period is

$4.0 trillion. The open group measure indicates the adequacy of financing

over the period as a whole for a program financed on a pay-as-you-go basis.

On this basis, payroll taxes of some future participants are included, through

the year 2079, but some or all of their future benefits, for years after 2079,

are excluded. 

Table IV.B5.—Components of 75-Year Actuarial Balance

Under Intermediate Assumptions (2005-79)

Item OASI DI OASDI

Present value as of January 1, 2005 (in billions):

a. Payroll tax revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $23,771 $4,037 $27,808

b. Taxation of benefits revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,520 122 1,642

c. Tax income (a + b). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25,291 4,159 29,450

d. Cost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30,121 5,032 35,154

e. Cost minus tax income (d - c) . . . . . . . . . . . . . . . . . . . . . . . . . . 4,830 874 5,704

f. Trust fund assets at start of period. . . . . . . . . . . . . . . . . . . . . . . 1,501 186 1,687

g. Open group unfunded obligation (e - f). . . . . . . . . . . . . . . . . . . 3,330 687 4,017

h. Ending target trust fund1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

1The calculation of the actuarial balance includes the cost of accumulating a target trust fund balance equal

to 100 percent of annual cost by the end of the period.

262 40 301

i. Income minus cost, plus assets at start of period, minus

ending target trust fund (c - d + f - h = - g - h) . . . . . . . . . . . . . -3,591 -727 -4,318

j. Taxable payroll . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224,501 224,501 224,501

Percent of taxable payroll:

Actuarial balance (100 × i ÷ j) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.60 -.32 -1.92
Actuarial Estimates

58

Table IV.B6 also presents the 75-year unfunded obligation as percentages of

future OASDI taxable payroll and gross domestic product (GDP) through

2079. The 75-year unfunded obligation as a percentage of taxable payroll is

less than the actuarial deficit, because it excludes the ending target trust fund

value (see table IV.B5).

However, there are limitations involved in using summarized measures for a

valuation period of only 75 years. First, overemphasis of summary measures

(such as the actuarial balance and open group unfunded obligation) that are

limited to the 75-year period can lead to incorrect perceptions and policy that

fail to address sustainability for the more distant future. This can be

addressed by considering the trend in trust fund ratios toward the end of the

period.

A second limitation is that continued, and possibly increasing annual shortfalls after the period are not reflected in the 75-year summarized measures.

In order to provide a fuller description of long-run unfunded obligations of

the OASDI program, this section presents estimates of obligations that

extend to the infinite horizon. The extension assumes that the current-law

OASDI program and the demographic and most economic trends used for

the 75-year projection continue indefinitely. The one exception starting with

this report, is that the ultimate assumed real-wage differential for the longrange period of 1.1 percent is increased to 1.2 percent for each year after

2079. This change from last year’s report establishes consistency with the

assumed reduction in the growth of health care expenditures after 2079. (See

the Medicare Trustees Report.) The values in table IV.B6 indicate that

extending the calculations beyond 2079 adds $7.1 trillion in unfunded obligations to the amount estimated through 2079. That is, over the infinite horizon, the OASDI open group unfunded obligations are projected to be

$11.1 trillion. The $7.1 trillion increment reflects a significant financing gap

for OASDI after 2079.

In last year’s report the unfunded obligation over the infinite horizon was

reported as $10.4 trillion in present value as of January 1, 2004. The change

to the later valuation date for this report, January 1, 2005, tends to increase

the measured deficit, by about $0.6 trillion. The net effects of this change in

valuation date and changes in data and methods for this report resulted in an

increase in the measured deficit of $0.5 trillion. See section IV.B.7 for details

regarding changes in data and methods. In addition, the change to reflect a

faster rate of growth in real wages after 2079 added another $0.2 trillion to

the measured deficit. While faster real wage growth after 2079 results in

increased tax revenue somewhat before it increases benefit levels, the cumulative additional growth in wage levels eventually results in greater dollar
59

Long-Range Estimates

increases in the relatively large projected cost of the OASDI program than in

the smaller projected tax revenues. Thus, eventually, faster real wage growth,

alone, results in an increase in the unfunded obligation of the program.

As noted in the previous section, the $11.1 trillion infinite future open group

unfunded obligation may also be expressed as a percentage of the taxable

payroll over that period. This actuarial deficit for the infinite future is

3.5 percent of taxable payroll under the intermediate assumptions,

unchanged from last year’s report. This unfunded obligation can also be

expressed as a percentage of GDP over the infinite future and is 1.2 percent

on that basis. These relative measures of the unfunded obligation over the

infinite future express its magnitude in relation to the resources that are

potentially available to finance the shortfall. These relative measures of the

infinite future unfunded obligation did not increase from last year’s report

because the present value of future payroll and GDP increased along with the

unfunded obligation.

Notes:

1. The present values of future taxable payroll for 2005-79 and for 2005 through the infinite horizon are

$224.5 trillion and $319.7 trillion, respectively.

2. The present values of GDP for 2005-79 and for 2005 through the infinite horizon are $618.1 trillion and

$921.2 trillion, respectively.

b. Unfunded Obligations for Past, Current, and Future Participants

The future unfunded obligation of the OASDI program may also be viewed

from a generational perspective. This perspective is generally associated

with assessment of the financial condition of a program that is intended or

required to be financed on a fully-advance-funded basis. However, analysis

from this perspective can also provide insights into the implications of payas-you-go financing, the basis that has been used for the OASDI program.

The first line of table IV.B7 shows that the present value of future cost less

future taxes over the next 100 years for all current participants equals

$13.7 trillion. For this purpose, current participants are defined as individuals

who are age 15 or older at the beginning of 2005. Subtracting the current

Table IV.B6.—Unfunded OASDI Obligations for 1935 (Program Inception)

Through the Infinite Horizon

[Present values as of January 1, 2005; dollar amounts in trillions]

Present

value

Expressed as a percentage

of future payroll and GDP

Taxable

payroll GDP

Unfunded obligation for 1935 through the infinite horizon1. . . . . 

1 Present value of future cost less future taxes, reduced by the amount of trust fund assets at the beginning of

2005. Expressed as percentage of payroll and GDP for the period 2005 through the infinite horizon.

$11.1 3.5 1.2

Unfunded obligation for 1935 through 20792 . . . . . . . . . . . . . . . . 

2 Present value of future cost less future taxes through 2079, reduced by the amount of trust fund assets at the

beginning of 2005. Expressed as percentage of payroll and GDP for the period 2005 through 2079.

4.0 1.8 .6
Actuarial Estimates

60

value of the trust fund (the accumulated value of past OASDI taxes less cost)

gives a closed group (excluding only future participants) unfunded obligation

of $12.0 trillion. This value represents the shortfall of lifetime contributions

for all past and current participants relative to the lifetime costs associated

with their generations. For a fully-advance-funded program this value would

be equal to zero.

For the Social Security benefits to be adequately financed for the infinite

future, the contributions or benefits of current and future participants in the

system must be adjusted to fully offset the shortfall due to past and current

participants. Future participants, as a whole, are projected to pay, in present

value, taxes that are approximately $0.9 trillion more than the cost of providing benefits they are scheduled to receive over the infinite future. Thus, the

remaining long run financing gap that program reforms must ultimately close

is $11.1 trillion in present value. This can be achieved by raising additional

revenue or reducing benefits (or some combination) for current and future

participants so that the present value of the additional revenue or reduced

benefits for the infinite future equals $11.1 trillion.

Notes:

1. The present value of future taxable payroll for 2005 through the infinite horizon is $319.7 trillion.

2. The present value of GDP for 2005 through the infinite horizon is $921.2 trillion.

3. Totals do not necessarily equal the sums of rounded components.

6. Test of Long-Range Close Actuarial Balance

The long-range test of close actuarial balance applies to a set of 66 separate

valuation periods beginning with the first 10-year period, and including the

periods of the first 11 years, the first 12 years, etc., up through the full

75-year projection period. Under the long-range test, the summarized income

rate and cost rate are calculated for each of these valuation periods. The

long-range test is met if, for each of the 66 valuation periods, the actuarial

balance is not less than zero or is negative by, at most, a specified percentage

of the summarized cost rate for the same time period. The percentage

Table IV.B7.—Present Values of OASDI Cost Less Tax Revenue and Unfunded 

Obligations for Program Participants

[Present values as of January 1, 2005; dollar amounts in trillions]

Present

value

Expressed as a percentage

of future payroll and GDP

Taxable

payroll GDP

Present value of future cost less future taxes for current participants . . . $13.7 4.3 1.5

Less current trust fund

(tax accumulations minus expenditures to date for past and current 

participants). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7 .5 .2

Equals unfunded obligation for past and current participants1 . . . . . . . .

1This concept is also referred to as the closed group unfunded obligation.

12.0 3.8 1.3

Plus present value of cost less taxes for future participants 

for the infinite future . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -.9 -.3 -.1

Equals unfunded obligation for all participants through the infinite

horizon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 3.5 1.2
61

Long-Range Estimates

allowed for a negative actuarial balance is 5 percent for the full 75-year

period. For shorter periods, the allowable percentage begins with zero for the

first 10 years and increases uniformly for longer periods, until it reaches the

maximum percentage of 5 percent allowed for the 75-year period. The criterion for meeting the test is less stringent for the longer periods in recognition

of the greater uncertainty associated with estimates for more distant years.

When a negative actuarial balance in excess of the allowable percentage of

the summarized cost rate is projected for one or more of the 66 separate valuation periods, the program fails the long-range test of close actuarial balance.

Being out of close actuarial balance indicates that the program is expected to

experience financial problems in the future and that ways of improving the

financial status of the program should be considered. The sooner the actuarial balance is less than the minimum allowable balance, expressed as a percentage of the summarized cost rate, the more urgent is the need for

corrective action. It is recognized that necessary changes in program financing or benefit provisions should not be put off until the last possible moment

if future beneficiaries and workers are to effectively plan for their retirement.

Table IV.B8 presents a comparison of the estimated actuarial balances with

the minimum allowable balance (or maximum allowable deficit) under the

long-range test, each expressed as a percentage of the summarized cost rate,

based on the intermediate estimates. Values are shown for only 14 of the valuation periods: those of length 10 years, 15 years, and continuing in 5-year

increments through 75 years. However, each of the 66 periods—those of

length 10 years, 11 years, and continuing in 1-year increments through

75 years—is considered for the test. These minimum allowable balances are

calculated to show the limit for each valuation period resulting from the

graduated tolerance scale. The patterns in the estimated balances as a percentage of the summarized cost rates, as well as that for the minimum allowable balance, are presented graphically in figure IV.B4 for the OASI, DI and

combined OASDI programs. Values shown for the 25-year, 50-year, and

75-year valuation periods correspond to those presented in table IV.B4.

For the OASI program, the estimated actuarial balance as a percentage of the

summarized cost rate exceeds the minimum allowable for valuation periods

of length 10 through 37 years under the intermediate estimates. For valuation

periods of length greater than 37 years, the estimated actuarial balance is less

than the minimum allowable. For the full 75-year long-range period the estimated actuarial balance reaches -11.82 percent of the summarized cost rate,

for a shortfall of 6.82 percent, from the minimum allowable balance of

-5.0 percent of the summarized cost rate. Thus, although the OASI program

satisfies the short-range test of financial adequacy (as discussed earlier on

page 30), it is not in long-range close actuarial balance.
Actuarial Estimates

62

For the DI program, the estimated actuarial balance as a percentage of the

summarized cost rate exceeds the minimum allowable balance for valuation

periods of length 10 through 16 years under the intermediate estimates. For

valuation periods of length greater than 16 years, the estimated actuarial balance is less than the minimum allowable. For the full 75-year long-range

period the estimated actuarial balance reaches -14.33 percent of the summarized cost rate, for a shortfall of 9.33 percent, from the minimum allowable

balance of -5.0 percent of the summarized cost rate. Thus, the DI program,

although meeting the short-range test of financial adequacy, is not in longrange close actuarial balance.

Financing for the DI program is much less adequate than for the OASI program during the first 25 years even though long-range actuarial deficits are

more comparable over the entire 75-year period. This occurs because much

more of the increase in the long-range cost due to the aging of the large

baby-boom generation occurs earlier for the DI program than for the OASI

program. As a result, tax rates that are relatively more adequate for the OASI

program during the first 25 years become relatively less adequate later in the

long-range period.

For the OASDI program, the estimated actuarial balance as a percentage of

the summarized cost rate exceeds the minimum allowable balance for valuation periods of length 10 through 35 years under the intermediate estimates.

For valuation periods of length greater than 35 years, the estimated actuarial

balance is below the minimum allowable balance. The size of the shortfall

from the minimum allowable balance rises gradually, reaching 7.18 percent

of the summarized cost rate for the full 75-year long-range valuation period.

Thus, although the OASDI program satisfies the short-range test of financial

adequacy, it is out of long-range close actuarial balance.

The OASI and DI programs, both separate and combined, were also found to

be out of close actuarial balance in last year’s report. The estimated deficits

for the OASI, DI, and combined OASDI programs in this report are similar

to those shown in last year’s report.
63

Long-Range Estimates

Note: Totals do not necessarily equal the sums of rounded components.

Table IV.B8.—Comparison of Estimated Long-Range Actuarial Balances With the 

Minimum Allowable in the Test for Close Actuarial Balance, 

Based on Intermediate Assumptions

Valuation period

Rates

(percentage of taxable payroll)

 Values expressed as a

percentage of cost rate

Summarized

income rate

Summarized cost rateActuarial

balance

Actuarial

balance

Minimum

allowable

actuarial

balance

OASI:

10 years: 2005-2014. . . . . 14.26 10.47 3.80 36.27 0.00

15 years: 2005-2019. . . . . 13.26 10.69 2.57 24.03 -.38

20 years: 2005-2024. . . . . 12.79 11.12 1.67 15.04 -.77

25 years: 2005-2029. . . . . 12.53 11.59 .95 8.16 -1.15

30 years: 2005-2034. . . . . 12.37 12.01 .36 2.97 -1.54

35 years: 2005-2039. . . . . 12.26 12.34 -.09 -.72 -1.92

40 years: 2005-2044. . . . . 12.17 12.59 -.42 -3.30 -2.31

45 years: 2005-2049. . . . . 12.11 12.78 -.67 -5.22 -2.69

50 years: 2005-2054. . . . . 12.06 12.93 -.87 -6.74 -3.08

55 years: 2005-2059. . . . . 12.03 13.07 -1.05 -8.03 -3.46

60 years: 2005-2064. . . . . 11.99 13.20 -1.21 -9.15 -3.85

65 years: 2005-2069. . . . . 11.97 13.32 -1.35 -10.15 -4.23

70 years: 2005-2074. . . . . 11.95 13.43 -1.48 -11.03 -4.62

75 years: 2005-2079. . . . . 11.93 13.53 -1.60 -11.82 -5.00

DI:

10 years: 2005-2014. . . . . 2.24 2.13 .11 5.10 .00

15 years: 2005-2019. . . . . 2.11 2.11 .01 .41 -.38

20 years: 2005-2024. . . . . 2.05 2.11 -.06 -2.86 -.77

25 years: 2005-2029. . . . . 2.02 2.14 -.12 -5.53 -1.15

30 years: 2005-2034. . . . . 2.00 2.15 -.15 -7.19 -1.54

35 years: 2005-2039. . . . . 1.98 2.16 -.18 -8.43 -1.92

40 years: 2005-2044. . . . . 1.97 2.18 -.21 -9.59 -2.31

45 years: 2005-2049. . . . . 1.96 2.19 -.23 -10.65 -2.69

50 years: 2005-2054. . . . . 1.95 2.21 -.26 -11.58 -3.08

55 years: 2005-2059. . . . . 1.95 2.22 -.27 -12.34 -3.46

60 years: 2005-2064. . . . . 1.94 2.23 -.29 -12.97 -3.85

65 years: 2005-2069. . . . . 1.94 2.24 -.30 -13.49 -4.23

70 years: 2005-2074. . . . . 1.94 2.25 -.31 -13.93 -4.62

75 years: 2005-2079. . . . . 1.94 2.26 -.32 -14.33 -5.00

OASDI:

10 years: 2005-2014. . . . . 16.50 12.60 3.91 31.00 .00

15 years: 2005-2019. . . . . 15.38 12.80 2.58 20.14 -.38

20 years: 2005-2024. . . . . 14.85 13.23 1.61 12.18 -.77

25 years: 2005-2029. . . . . 14.55 13.72 .83 6.03 -1.15

30 years: 2005-2034. . . . . 14.36 14.16 .20 1.43 -1.54

35 years: 2005-2039. . . . . 14.24 14.51 -.27 -1.87 -1.92

40 years: 2005-2044. . . . . 14.14 14.77 -.62 -4.23 -2.31

45 years: 2005-2049. . . . . 14.07 14.97 -.90 -6.02 -2.69

50 years: 2005-2054. . . . . 14.02 15.15 -1.13 -7.45 -3.08

55 years: 2005-2059. . . . . 13.97 15.30 -1.32 -8.65 -3.46

60 years: 2005-2064. . . . . 13.94 15.44 -1.50 -9.70 -3.85

65 years: 2005-2069. . . . . 13.91 15.57 -1.65 -10.63 -4.23

70 years: 2005-2074. . . . . 13.89 15.68 -1.80 -11.45 -4.62

75 years: 2005-2079. . . . . 13.87 15.79 -1.92 -12.18 -5.00
Actuarial Estimates

64

7. Reasons for Change in Actuarial Balance From Last Report

The estimated effects of various changes from last year’s report to this report

on the long-range actuarial balance under the intermediate assumptions are

listed (by category) in table IV.B9.

 Figure IV.B4.—Long-Range Test of Close Actuarial Balance

[Comparison of estimated long-range actuarial balances with the minimum 

allowable for close actuarial balance under intermediate assumptions]

-20%

-15%

-10%

-5%

0%

5%

10%

15%

20%

25%

30%

35%

40%

2014 2019 2024 2029 2034 2039 2044 2049 2054 2059 2064 2069 2074 2079

Ending year of valuation period

 Actuarial balance as percentage

 of summarized cost rate

 Minimum allowable actuarial balance

OASI

OASDI

DI
65

Long-Range Estimates

Note: Totals do not necessarily equal the sums of rounded components.

One legislative change that affects the financing of the Social Security program, the Social Security Protection Act of 2004, Public Law 108-203, is

included for the first time in the estimates for this report (see section III.B).

The effect of this legislation is estimated to change the long-range OASDI

actuarial balance by a negligible amount (less than 0.005 percent of taxable

payroll).

In changing from the valuation period of last year’s report, which was

2004-78, to the valuation period of this report, 2005-79, the relatively large

negative annual balance for 2079 is included. This results in a larger longrange actuarial deficit. (Note that the fund balance at the end of 2004, i.e., at

the beginning of the projection period, is included in the 75-year actuarial

balance.) 

Ultimate demographic assumptions are unchanged from last year’s report.

However, recently available data on new marriages from the National Center

for Health Statistics (NCHS) for 1989-95 and updated estimates of marriage

prevalence since 1980 are incorporated in estimating the number of married

persons in the population. These revised historical estimates result in lower

starting and future levels of married persons in the population. Additionally,

newly available birth data from the NCHS for 2002 and newly revised

population data from the Census Bureau for 2000 through 2002 result in

higher fertilty rates during the first 25 years of the projection period. Both

Table IV.B9.—Reasons for Change in the 75-Year Actuarial Balance

Under Intermediate Assumptions

[As a percentage of taxable payroll]

Item OASI DI OASDI

Shown in last year's report:

Income rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.90 1.94 13.84

Cost rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.46 2.27 15.73

Actuarial balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.56 -.33 -1.89

Changes in actuarial balance due to changes in:

Legislation / Regulation . . . . . . . . . . . . . . . . . . . . . . . .00 .00 .00

Valuation period1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 In changing from the valuation period of last year’s report, which was 2004-78, to the valuation period of

this report, 2005-79, the relatively large negative annual balance for 2079 is included. This results in a larger

long-range actuarial deficit. The fund balance at the end of 2004, i.e., at the beginning of the projection

period, is included in the 75-year actuarial balance.

-.06 -.01 -.07

Demographic data and assumptions. . . . . . . . . . . . . . +.02 +.01 +.03

Economic data and assumptions. . . . . . . . . . . . . . . . . -.06 -.01 -.06

Disability data and assumptions. . . . . . . . . . . . . . . . . +.01 -.02 -.01

Programmatic data and methods . . . . . . . . . . . . . . . . +.04 +.03 +.07

Total change in actuarial balance . . . . . . . . . . . . . . . . . . -.04 .00 -.04

Shown in this report:

Actuarial balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.60 -.32 -1.92

Income rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.93 1.94 13.87

Cost rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.53 2.26 15.79
Actuarial Estimates

66

the new marriage estimates and the revised fertility rates result in an

improvement in the long-range OASDI actuarial balance. Overall, the

updates to the demographic data result in an increase in the long-range

OASDI actuarial balance of about 0.03 percent of taxable payroll.

Changes in starting values for the economic assumptions and in the transition

to ultimate economic assumptions have a negative effect on the long-range

actuarial balance. Higher than expected inflation in 2004 affected benefit

payments more than taxable payroll. Taxable payroll for 2004 is close to that

projected in last year’s report. However, the cost-of-living adjustment

(COLA) for December 2004 was estimated to be 1.1 percent in last year’s

report, but turned out to be 2.7 percent. This contributes toward higher

benefit payments than projected in last year’s report for at least the next

20 years. In addition, the projected real interest rate on trust fund investments

during the first 10 years of the projection period is lower this year, consistent

with recent data. This change also has a negative effect on the actuarial

balance. The net effect of these economic changes is a reduction (worsening)

in the long-range actuarial balance of about 0.06 percent of taxable payroll.

New data result in slight increases in the starting levels of disabled-worker

beneficiaries and benefit levels from those projected in last year’s report.

These increases reduce (worsen) the long-range actuarial balance by about

0.01 percent of payroll.

Several methodological improvements and updates of program-specific data

are included for projections in the 2005 report. These changes to

programmatic data and methods result in a net increase in the long-range

OASDI actuarial balance of about 0.07 percent of payroll including

interaction. First, the largest single change in methods is related to the projection of benefit levels for workers who will become eligible in the future.

The method of projecting benefit levels is improved by better reflecting the

age-specific earnings levels of younger workers in recent years. These recent

earnings have been relatively lower for young men, and relatively higher for

women. The changes to accommodate these shifts result in lower benefit levels for males and partially offsetting higher benefit levels for females than

were projected in last year’s report. In addition, the method of projecting

benefits for dually-entitled individuals is revised to reflect not only the difference in the average benefit levels between men and women, but also the

variation in benefit levels among men and among women. These improvements increase (improve) the long-range actuarial balance by about

0.14 percent of payroll. A second significant change is an improvement in

the method for computing mortality rates for individuals aged 65 through 69.

Analysis of Medicare data showed that since 1988, deaths should have been

tabulated at age 65 reflecting an average of 9 months of exposure, rather than
67

Long-Range Estimates

6 months, due to advance filing for Medicare. Correcting the exposure in

these calculations results in slightly lower death rates for the age group 65

through 69 and also results in a slightly faster initial rate of decline in death

rates for this age group in the early projection years. This modification

reduces (worsens) the long-range actuarial balance by about 0.04 percent of

taxable payroll. The third significant change in methodology lowers the

projected labor force participation rates of teenagers and older workers. The

labor force participation rates for teenagers were lowered to be consistent

with actual rates for the last 5 years. These actual rates have remained lower

than prior years, even after the end of the 2001 economic slowdown. In

addition, the labor force participation rates of males and females age 65

through 69 were corrected to eliminate an overestimate in the maximum

potential adjustment related to the increase in life expectancy that was

present in last year’s report. These changes in labor force participation rates

result in fewer workers and decrease (worsen) the long-range actuarial

balance by about 0.05 percent of payroll. The combination of several other

smaller changes in methodologies increases (improves) the long-range

actuarial balance by about 0.02 percent of taxable payroll.

If no changes in assumptions or methods were made for this report and actual

experience had met expectations since the last report, the long-range OASDI

actuarial deficit would, nonetheless, have increased by 0.07 percent of

taxable payroll from the level estimated for last year’s report due to the

change in the valuation period (see table IV.B9). The changes made in data,

assumptions, and methods for this report, together, offset about one-half of

the increase in the deficit due to the new valuation period. This is indicated

by the total 0.04 percent increase in the deficit, which, after rounding,

increases the deficit from 1.89 percent to 1.92 percent of payroll.

The effects of changes made in this report can also be illustrated by comparing the annual (cash-flow) balances for this and the prior year’s report. Figure IV.B5 provides this comparison for the combined OASDI program over

the long range.
Actuarial Estimates

68

The projected annual balances in this report start at a lower level than those

in last year’s report largely due to worse than expected recent economic

experience. Over the period 2015 through 2030, annual balances are similar

between the two reports. After 2030, however, the annual balances in this

year’s report are larger. The annual deficit for 2078 is 5.66 percent of taxable

payroll in this report compared to 5.91 percent for 2078 in last year’s report.

Most of the improvement in the 2078 annual deficit results from a refinement

in the method for projecting benefit levels by reflecting the age-specific

trend in earnings levels over recent years.

 Figure IV.B5.—OASDI Annual Balances: 2004 and 2005 Reports

[As a percentage of taxable payroll under the intermediate assumptions]

-8%

-6%

-4%

-2%

0%

2%

4%

2000 2010 2020 2030 2040 2050 2060 2070 2080

Calendar year

2004 Report

2005 Report
69

Demographic Assumptions and Methods

V. ASSUMPTIONS AND METHODS UNDERLYING

ACTUARIAL ESTIMATES

The future income and cost of the OASDI program will depend on many

demographic, economic, and program-specific factors. Trust fund income

will depend on how these factors affect the size and composition of the

working population and the level and distribution of earnings. Similarly, program cost will depend on how these factors affect the size and composition

of the beneficiary population and the general level of benefits.

Basic assumptions are developed for several of these factors based on analysis of historical trends and conditions, and on expected future conditions.

These include fertility, mortality, immigration, marriage, divorce, productivity, inflation, average earnings, unemployment, retirement, and disability

incidence and termination. Other factors are projected using methods that

reflect historical and expected future relationships to the basic assumptions.

These include total population, life expectancy, labor force, gross domestic

product, interest rates, and a myriad of program-specific factors. It should be

noted that all factors included in any consistent set of assumptions are interrelated directly or indirectly. It is also important to note that these interrelationships can and do change over time.

The assumptions and methods used in this report are reexamined each year in

light of recent experience and new information about future conditions, and

are revised if warranted.

Because projections of these factors and their interrelationships are inherently uncertain, a range of estimates is shown in this report on the basis of

three sets of assumptions, designated as intermediate (alternative II), low

cost (alternative I), and high cost (alternative III). The intermediate set represents the Board’s best estimate of the future course of the population and the

economy. In terms of the net effect on the status of the OASDI program, the

low cost is the most optimistic, and the high cost is the most pessimistic.

Although these three sets of demographic and economic assumptions have

been developed using the best available information, the resulting estimates

should be interpreted with care. The estimates are not intended to be specific

predictions of the future financial status of the OASDI program, but rather,

they are intended to be indicators of the expected trend and a reasonable

range of future income and cost, under a variety of plausible demographic

and economic conditions.

The values for each of the demographic, economic, and program-specific

factors are assumed to move from recently experienced levels or trends,
Assumptions & Methods

70

toward long-range ultimate values generally over the next 5 to 25 years. Ultimate values or trends reached by the end of the 75-year long-range period are

generally maintained at these levels or trends for extrapolations beyond 75

years. One exception is for real wage growth, as described in section IV.B.5.

The ultimate values assumed after the first 5 to 25 years (and through the end

of the 75-year long-range period) for both the demographic and the economic factors are intended to represent average annual experience or growth

rates. Actual future values will exhibit fluctuations or cyclical patterns, as in

the past.

The following sections discuss in abbreviated form the various assumptions

and methods required to make the estimates of trust fund financial status

which are the heart of this report.1 There are, of course, many interrelationships among these factors that make a sequential presentation somewhat misleading. Nevertheless, the following sections roughly follow the order used

in building the trust fund estimates presented in chapter IV.

A. DEMOGRAPHIC ASSUMPTIONS AND METHODS

The principal demographic assumptions relating to fertility, mortality, and

net immigration for the three alternatives are shown in table V.A1. The

rationales for selecting these assumptions are discussed in the following

three sections.

1. Fertility Assumptions

Fertility (birth rate) assumptions are developed by single year of age, from

14 to 49. They are applied to the total number of women in the population at

each age, for all marital statuses.

Historically, fertility rates in the United States have fluctuated widely. The

total fertility rate2 decreased from 3.3 children per woman after World War I

to 2.1 during the Great Depression, rose to 3.7 in 1957, and then fell to 1.7 in

 1 Further details about the assumptions, methods, and actuarial estimates are contained in Actuarial Studies

published by the Office of the Chief Actuary, Social Security Administration. A complete list of available

studies may be found on the Internet at www.socialsecurity.gov/OACT/NOTES/actstud.html. To obtain copies of such Studies, or of this report, submit a request via our Internet request form; or write to: Office of the

Chief Actuary, 700 Altmeyer Building, 6401 Security Boulevard, Baltimore, MD 21235; or call (410) 965-

3015. This entire report, along with supplemental year-by-year tables, may also be found at www.socialsecurity.gov/OACT/TR/TR05/index.html.

 2 Defined to be the average number of children that would be born to a woman in her lifetime if she were to

experience the birth rates by age observed in, or assumed for, the selected year, and if she were to survive the

entire childbearing period. A rate of 2.1 would ultimately result in a nearly constant population if net immigration were zero and if death rates were constant.
71

Demographic Assumptions and Methods

1976. After 1976, the total fertility rate began to rise again, reaching a level

of 2.07 for 1990. Since then, the total fertility rate has remained fairly stable,

around 2.0 children per woman.

These variations in fertility rates have resulted from changes in many factors,

including social attitudes, economic conditions, and the use of birth-control

methods. Future fertility rates may be expected to remain close to recent levels. The recent historical and projected trends in certain population characteristics are consistent with a continued relatively low fertility rate. These

trends include the rising percentages of women who have never married, of

women who are divorced, and of young women who are in the labor force.

Based on consideration of these factors, ultimate total fertility rates of 2.2,

1.95, and 1.7 children per woman were selected for the low cost, intermediate, and high cost assumptions, respectively. For each alternative, the total

fertility rate is assumed to gradually trend from the estimated level of 2.02

for 2002, reaching the selected ultimate level for 2029 and later.

The ultimate total fertility rates are unchanged from those used in last year’s

report. However, total fertility rates for about the first 10 years of the projection period are higher than in last year’s report due to incorporating additional birth data for 2002 and revised population data for 2000-02. These

recent birth and population data result in slightly higher starting levels that

remain at higher levels until around 2015.

2. Mortality Assumptions

Mortality (death rate) assumptions are developed by single year of age, sex,

and cause of death.

Death rates in the United States since 1900 have declined substantially, but at

varying rates. Historical rates (for years 1900-2001) used in preparing this

report were calculated for ages below 65 (and for all ages prior to 1968)

using data from the National Center for Health Statistics (NCHS).1 For ages

65 and over, Medicare final data were used for years 1968 through 2001.

Also used are death rates by cause of death produced by the NCHS for years

1979-2001.

 1 These rates reflect NCHS data on deaths and Census estimates of population.
Assumptions & Methods

72

The total age-sex-adjusted death rate1 declined at an average rate2 of

1.06 percent per year between 1900 and 2001. Between 1979 and 2001, the

period for which death rates are analyzed by cause, the total age-sex-adjusted

death rate (for all causes combined) declined at an average rate of

0.72 percent per year.

Historical death rates have declined more slowly for older ages than for the

rest of the population. The age-sex-adjusted death rate for ages 65 and over

declined at an average rate of 0.72 percent per year between 1900 and 2001.

Between 1979 and 2001 the age-sex-adjusted death rate for these ages

declined at an average annual rate of 0.47 percent.

Reductions in death rates have resulted from many factors, including

increased medical knowledge and availability of health-care services, and

improvements in sanitation and nutrition. Based on consideration of the

expected rate of future progress in these and other areas, three alternative

sets of ultimate annual percentage reductions in central death rates by age,

sex, and cause of death were selected for 2029 and later. The intermediate

set, which is used for alternative II, is considered to be the most likely to

occur. The average annual percentage reductions used for alternative I are

generally smaller than those for alternative II, while those used for alternative III are generally greater. These three sets of ultimate annual percentage

reductions are unchanged from those used in last year’s report.

After 2001, the reductions in central death rates for alternative II are

assumed to change rapidly from the average annual reductions by age, sex,

and cause of death observed between 1981 and 2001, to the ultimate annual

percentage reductions by age, sex, and cause of death assumed for 2029 and

later. The reductions in death rates under alternatives I and III are also

assumed to change rapidly to their ultimate levels, but start from levels

which are, respectively, 50 or 150 percent of the average annual reductions

observed between 1981 and 2001.

Projections of age-sex-adjusted death rates are presented in table V.A1 for

the total (all ages), for under age 65, and for ages 65 and over. Under the

intermediate assumptions, these projected age-sex-adjusted death rates are

slightly lower than the death rates in last year’s report. New data for 2001

and a revision in the method of calculating death rates for ages 65-69 result

 1 Calculated here as the crude rate that would occur in the enumerated total population as of April 1, 2000, if

that population were to experience the death rates by age and sex for the selected year.

 2 Average rate of decline is calculated as the annual geometric rate of reduction between the first and last

years of the period.
73

Demographic Assumptions and Methods

in age-sex-adjusted death rates throughout the projection period that are

slightly lower than those in last year’s report.

After adjustment for changes in the age-sex distribution of the population,

the resulting total death rates are projected to decline at ultimate average

annual rates of about 0.33 percent, 0.71 percent, and 1.23 percent between

2029 and 2079 for alternatives I, II, and III, respectively. In keeping with the

patterns observed in the historical data, future rates of decline are assumed to

be greater for younger ages than for older ages, but to a lesser degree than in

the past. Accordingly, age-sex-adjusted death rates for ages 65 and over are

projected to decline at average annual rates of about 0.29 percent,

0.67 percent, and 1.17 percent between 2029 and 2079 for alternatives I, II,

and III, respectively.

There is a wide range of opinion among experts on the likely rate of future

decline in death rates. For example, the 2003 Technical Panel on Assumptions and Methods appointed by the Social Security Advisory Board believed

that ultimate rates of decline in mortality will be higher than the rates of

decline assumed for the intermediate projections in this report. Others

believe that biological and social factors may slow future rates of decline in

mortality. Evolving mortality trends and developments in health care and life

style will be closely monitored to determine what further modifications to

the assumed ultimate rates of decline in mortality may be warranted for

future reports.

3. Immigration Assumptions

Legal immigration1 increased after World War II to around 300,000 persons

per year and remained around that level until shortly after 1960. With the

Immigration Act of 1965 and other related changes, annual legal immigration increased to about 400,000 and remained fairly stable until 1977.

Between 1977 and 1990, legal immigration once again increased, averaging

about 580,0002 per year. The Immigration Act of 1990, which took effect in

fiscal year 1992, restructured the immigration categories and increased significantly the number of immigrants who may legally enter the United States.

Legal immigration averaged about 825,0002 persons per year during the

period 1992 through 2003. The number of legal immigrants in 2003 is estimated to be 706,000 persons.

 1 Consistent with the U.S. Citizenship and Immigration Services, legal immigrants are individuals admitted

to the U.S. for legal permanent residence.

 2 Excludes those persons admitted under the Immigration Reform and Control Act of 1986.
Assumptions & Methods

74

For 2003, net legal immigration (after considering emigration) is estimated

to be about 530,000 persons. Net other immigration is estimated to be

400,000 persons. For 2004, net legal immigration is estimated to be 600,000

persons for the intermediate, low cost, and high cost assumptions. Net other

immigration for 2004 is estimated to be 400,000 persons for all three

assumptions.

The ultimate annual net immigration assumptions are unchanged from those

in last year’s report. After 2004, the annual number of net legal immigrants is

projected to reach the ultimate level around 2007. The ultimate level of

annual net other immigrants is projected to be reached in 2025 under the

intermediate and low cost assumptions and in 2015 under the high cost

assumptions.

The total level of net immigration (legal and other, combined) under the

intermediate projection is assumed to be 1,075,000 persons in 2005, and

900,000 persons1 in 2025 and for each year afterward. For the low cost

assumptions, net immigration is assumed to increase slightly from a level of

1,270,000 persons in 2005 to an ultimate level of 1,300,000 persons2 for

each year 2025 and later. Under the high cost assumptions, net immigration

is assumed to be 880,000 persons in 2005, and 672,500 persons3 for each

year after 2015.

There is a very wide range of opinion about the future course of immigration

for the United States. Some, like the 2003 Technical Panel mentioned in the

previous section, believe that immigration will increase substantially in the

future. Others believe that potential immigrants may be attracted to other

countries or that the U.S. borders could be tightened in the future.

 1 600,000 net legal immigrants plus 300,000 net other immigrants.

 2 850,000 net legal immigrants plus 450,000 net other immigrants.

 3 472,500 net legal immigrants plus 200,000 net other immigrants.
75

Demographic Assumptions and Methods

Table V.A1.—Principal Demographic Assumptions, Calendar Years 1940-2080

Calendar year

Total

fertility

rate1

Age-sex-adjusted death rate2

per 100,000, by age Net immigration

Total Under 65 65 and over Legal3 Other4

Historical data:

1940 . . . . . . . . . 2.23 1,779.1 673.0 9,569.0

1945 . . . . . . . . . 2.42 1,586.6 601.8 8,522.4

1950 . . . . . . . . . 3.03 1,435.6 499.4 8,028.3 170,594

1955 . . . . . . . . . 3.50 1,334.2 442.8 7,612.2 209,779

1960 . . . . . . . . . 3.61 1,330.9 436.9 7,626.7 201,276

1965 . . . . . . . . . 2.88 1,304.6 430.0 7,464.0 232,400

1970 . . . . . . . . . 2.43 1,224.3 422.6 6,870.7 278,928

1975 . . . . . . . . . 1.77 1,099.0 369.5 6,236.4 294,303

1980 . . . . . . . . . 1.82 1,035.9 331.9 5,993.6 410,348

1985 . . . . . . . . . 1.84 984.2 303.6 5,777.6 433,449

1990 . . . . . . . . . 2.07 931.2 289.4 5,451.1 501,065

1991 . . . . . . . . . 2.06 918.8 286.2 5,373.5 548,000

1992 . . . . . . . . . 2.04 906.2 280.2 5,315.3 620,986

1993 . . . . . . . . . 2.02 928.0 283.1 5,470.0 644,696

1994 . . . . . . . . . 2.00 916.2 280.5 5,392.7 583,390

1995 . . . . . . . . . 1.98 913.9 277.3 5,397.5 573,719

1996 . . . . . . . . . 1.98 900.4 266.1 5,367.2 662,284

1997 . . . . . . . . . 1.97 885.1 253.6 5,332.5 571,800

1998 . . . . . . . . . 2.00 878.3 246.9 5,325.2 489,360

1999 . . . . . . . . . 2.01 884.3 245.0 5,386.6 523,037

2000 . . . . . . . . . 2.06 875.6 243.3 5,328.3 677,579 550,000

2001 . . . . . . . . . 2.03 867.1 243.2 5,260.7 798,126 550,000

20025 . . . . . . . . 2.02 866.2 236.2 5,302.9 730,689 550,000

20035 . . . . . . . . 2.03 861.9 233.3 5,288.7 529,370 400,000

20045 . . . . . . . . 2.02 857.9 230.5 5,276.3 600,000 400,000

Intermediate: 

2005 . . . . . . . . . 2.02 854.2 227.8 5,265.5 675,000 400,000

2010 . . . . . . . . . 2.01 828.2 215.9 5,140.0 600,000 400,000

2015 . . . . . . . . . 1.99 796.7 205.5 4,960.1 600,000 350,000

2020 . . . . . . . . . 1.98 764.7 195.9 4,770.4 600,000 350,000

2025 . . . . . . . . . 1.96 734.0 187.0 4,586.1 600,000 300,000

2030 . . . . . . . . . 1.95 705.0 178.7 4,411.4 600,000 300,000

2035 . . . . . . . . . 1.95 677.7 170.9 4,247.1 600,000 300,000

2040 . . . . . . . . . 1.95 652.1 163.5 4,093.3 600,000 300,000

2045 . . . . . . . . . 1.95 628.2 156.6 3,949.2 600,000 300,000

2050 . . . . . . . . . 1.95 605.7 150.1 3,813.9 600,000 300,000

2055 . . . . . . . . . 1.95 584.5 144.0 3,686.8 600,000 300,000

2060 . . . . . . . . . 1.95 564.6 138.3 3,567.1 600,000 300,000

2065 . . . . . . . . . 1.95 545.8 132.8 3,454.4 600,000 300,000

2070 . . . . . . . . . 1.95 528.1 127.7 3,348.0 600,000 300,000

2075 . . . . . . . . . 1.95 511.3 122.8 3,247.5 600,000 300,000

2080 . . . . . . . . . 1.95 495.5 118.2 3,152.5 600,000 300,000
Assumptions & Methods

76

4. Total Population Estimates

Combining the above assumptions for future fertility, mortality, and net

immigration with assumptions on marriage and divorce based on data from

NCHS, projections were made of the population in the Social Security area

by age, sex, and marital status as of January 1 of each year 2004 through

Low Cost: 

2005 . . . . . . . . . 2.05 859.9 229.5 5,299.3 720,000 550,000

2010 . . . . . . . . . 2.08 858.5 224.1 5,325.6 850,000 550,000

2015 . . . . . . . . . 2.11 847.2 218.4 5,275.8 850,000 500,000

2020 . . . . . . . . . 2.14 832.9 212.6 5,201.2 850,000 500,000

2025 . . . . . . . . . 2.17 817.9 207.0 5,120.3 850,000 450,000

2030 . . . . . . . . . 2.20 803.1 201.6 5,038.9 850,000 450,000

2035 . . . . . . . . . 2.20 788.7 196.5 4,959.4 850,000 450,000

2040 . . . . . . . . . 2.20 774.8 191.5 4,882.8 850,000 450,000

2045 . . . . . . . . . 2.20 761.5 186.8 4,808.9 850,000 450,000

2050 . . . . . . . . . 2.20 748.7 182.3 4,737.6 850,000 450,000

2055 . . . . . . . . . 2.20 736.3 177.9 4,668.9 850,000 450,000

2060 . . . . . . . . . 2.20 724.4 173.7 4,602.5 850,000 450,000

2065 . . . . . . . . . 2.20 712.9 169.7 4,538.4 850,000 450,000

2070 . . . . . . . . . 2.20 701.8 165.9 4,476.6 850,000 450,000

2075 . . . . . . . . . 2.20 691.2 162.1 4,416.8 850,000 450,000

2080 . . . . . . . . . 2.20 680.9 158.6 4,359.0 850,000 450,000

High Cost:

2005 . . . . . . . . . 1.99 848.5 226.1 5,231.7 630,000 250,000

2010 . . . . . . . . . 1.93 796.9 206.7 4,953.4 472,500 250,000

2015 . . . . . . . . . 1.87 743.5 190.0 4,641.3 472,500 200,000

2020 . . . . . . . . . 1.81 692.5 175.1 4,336.7 472,500 200,000

2025 . . . . . . . . . 1.75 645.3 161.5 4,052.4 472,500 200,000

2030 . . . . . . . . . 1.70 601.9 149.2 3,790.7 472,500 200,000

2035 . . . . . . . . . 1.70 562.3 137.9 3,550.9 472,500 200,000

2040 . . . . . . . . . 1.70 526.0 127.6 3,331.6 472,500 200,000

2045 . . . . . . . . . 1.70 492.8 118.2 3,130.8 472,500 200,000

2050 . . . . . . . . . 1.70 462.4 109.7 2,946.6 472,500 200,000

2055 . . . . . . . . . 1.70 434.5 101.8 2,777.4 472,500 200,000

2060 . . . . . . . . . 1.70 408.8 94.6 2,621.8 472,500 200,000

2065 . . . . . . . . . 1.70 385.2 87.9 2,478.5 472,500 200,000

2070 . . . . . . . . . 1.70 363.4 81.8 2,346.3 472,500 200,000

2075 . . . . . . . . . 1.70 343.3 76.2 2,224.2 472,500 200,000

2080 . . . . . . . . . 1.70 324.7 71.0 2,111.2 472,500 200,000

1The total fertility rate for any year is the average number of children who would be born to a woman in her

lifetime if she were to experience the birth rates by age observed in, or assumed for, the selected year, and if

she were to survive the entire childbearing period. The ultimate total fertility rate is assumed to be reached in

2029.

2 The age-sex-adjusted death rate is the crude rate that would occur in the enumerated total population as of

April 1, 2000, if that population were to experience the death rates by age and sex observed in, or assumed

for, the selected year.

3 Historical estimates of net legal immigration assume a 25 percent reduction in legal immigration due to

legal emigration. Estimates do not include persons legalized under the Immigration Reform and Control Act

of 1986.

4 Net other annual immigration is estimated to have averaged 375,000 persons over the period 1980-89 and

550,000 over the period 1990-99.

5 Preliminary or estimated.

Table V.A1.—Principal Demographic Assumptions, Calendar Years 1940-2080 (Cont.)

Calendar year

Total

fertility

rate1

Age-sex-adjusted death rate2

per 100,000, by age Net immigration

Total Under 65 65 and over Legal3 Other4
77

Demographic Assumptions and Methods

2080. The starting Social Security area population for January 1, 2003, uses

as a basis the Census Bureau’s estimate of the residents of the 50 States and

D.C., and U.S. Armed Forces overseas. The base estimate is adjusted for net

census undercount and increased for other U.S. citizens living abroad

(including residents of U.S. territories) and for non-citizens living abroad

who are insured for Social Security benefits. This starting population was

then projected using assumed rates of birth, death, marriage and divorce, and

assumed levels of net immigration.

Table V.A2 shows the projected population as of July 1 by broad age group,

for the three alternatives. Also shown are tabulated aged and total dependency ratios (see table footnotes for definitions).

Table V.A2.—Social Security Area Population as of July 1 and Dependency Ratios,

Calendar Years 1950-2080 

Calendar year

Population (in thousands) Dependency ratio

Under 20 20-64

65 and

over Total Aged1 Total2

Historical data:

1950 . . . . . . . . . . . . . . 54,466 92,841 12,811 160,118 0.138 0.725

1960 . . . . . . . . . . . . . . 73,076 99,818 17,278 190,172 .173 .905

1965 . . . . . . . . . . . . . . 80,132 104,795 19,091 204,018 .182 .947

1970 . . . . . . . . . . . . . . 80,684 113,158 20,923 214,765 .185 .898

1975 . . . . . . . . . . . . . . 78,437 122,857 23,305 224,599 .190 .828

1980 . . . . . . . . . . . . . . 74,568 134,428 26,237 235,233 .195 .750

1985 . . . . . . . . . . . . . . 73,211 144,957 29,167 247,335 .201 .706

1990 . . . . . . . . . . . . . . 75,060 153,368 32,029 260,458 .209 .698

1995 . . . . . . . . . . . . . . 79,621 160,844 34,322 274,786 .213 .708

2000 . . . . . . . . . . . . . . 82,557 170,274 35,423 288,255 .208 .693

Intermediate:

2005 . . . . . . . . . . . . . . 83,859 181,017 36,798 301,673 .203 .667

2010 . . . . . . . . . . . . . . 84,579 189,544 39,788 313,912 .210 .656

2015 . . . . . . . . . . . . . . 85,101 195,071 45,912 326,084 .235 .672

2020 . . . . . . . . . . . . . . 86,412 197,819 53,542 337,774 .271 .707

2025 . . . . . . . . . . . . . . 87,319 199,091 62,318 348,728 .313 .752

2030 . . . . . . . . . . . . . . 88,477 199,758 69,897 358,133 .350 .793

2035 . . . . . . . . . . . . . . 89,203 202,410 74,464 366,077 .368 .809

2040 . . . . . . . . . . . . . . 89,718 206,118 76,880 372,715 .373 .808

2045 . . . . . . . . . . . . . . 90,236 209,519 78,680 378,435 .376 .806

2050 . . . . . . . . . . . . . . 91,018 211,891 80,791 383,701 .381 .811

2055 . . . . . . . . . . . . . . 91,909 213,749 83,244 388,902 .389 .819

2060 . . . . . . . . . . . . . . 92,749 215,201 86,285 394,235 .401 .832

2065 . . . . . . . . . . . . . . 93,477 217,322 88,881 399,680 .409 .839

2070 . . . . . . . . . . . . . . 94,133 219,132 91,792 405,056 .419 .848

2075 . . . . . . . . . . . . . . 94,809 221,426 94,006 410,242 .425 .853

2080 . . . . . . . . . . . . . . 95,554 223,359 96,295 415,208 .431 .859
Assumptions & Methods

78

Notes:

1. Historical data are subject to revision.

2. Totals do not necessarily equal the sums of rounded components.

5. Life Expectancy Estimates

Life expectancy, or average remaining number of years expected prior to

death, is a useful analytical concept. Life expectancy is calculated in two different forms, for two separate purposes.

Period life expectancy is calculated for a given year using the actual or

expected death rates at each age for that year. It is a useful summary statistic

for illustrating the overall level of the death rates experienced in a single

Low Cost:

2005 . . . . . . . . . . . . . . 83,978 181,074 36,794 301,846 0.203 0.667

2010 . . . . . . . . . . . . . . 85,768 190,709 39,665 316,143 .208 .658

2015 . . . . . . . . . . . . . . 88,018 197,621 45,518 331,157 .230 .676

2020 . . . . . . . . . . . . . . 91,664 201,823 52,736 346,223 .261 .715

2025 . . . . . . . . . . . . . . 95,449 204,702 60,932 361,083 .298 .764

2030 . . . . . . . . . . . . . . 99,723 207,470 67,770 374,962 .327 .807

2035 . . . . . . . . . . . . . . 103,440 212,830 71,513 387,783 .336 .822

2040 . . . . . . . . . . . . . . 106,815 219,809 73,161 399,785 .333 .819

2045 . . . . . . . . . . . . . . 110,198 226,982 74,409 411,589 .328 .813

2050 . . . . . . . . . . . . . . 113,856 233,651 76,258 423,765 .326 .814

2055 . . . . . . . . . . . . . . 117,819 240,187 78,637 436,643 .327 .818

2060 . . . . . . . . . . . . . . 121,883 246,772 81,612 450,268 .331 .825

2065 . . . . . . . . . . . . . . 125,837 254,599 84,046 464,482 .330 .824

2070 . . . . . . . . . . . . . . 129,675 262,704 86,712 479,091 .330 .824

2075 . . . . . . . . . . . . . . 133,551 271,510 88,984 494,045 .328 .820

2080 . . . . . . . . . . . . . . 137,588 280,006 91,798 509,391 .328 .819

High Cost:

2005 . . . . . . . . . . . . . . 83,739 180,959 36,802 301,500 .203 .666

2010 . . . . . . . . . . . . . . 83,496 188,634 39,934 312,064 .212 .654

2015 . . . . . . . . . . . . . . 82,501 193,255 46,396 322,152 .240 .667

2020 . . . . . . . . . . . . . . 81,745 195,063 54,560 331,368 .280 .699

2025 . . . . . . . . . . . . . . 80,121 195,271 64,098 339,490 .328 .739

2030 . . . . . . . . . . . . . . 78,688 194,532 72,676 345,896 .374 .778

2035 . . . . . . . . . . . . . . 77,020 195,227 78,389 350,636 .402 .796

2040 . . . . . . . . . . . . . . 75,366 196,465 81,966 353,797 .417 .801

2045 . . . . . . . . . . . . . . 73,842 196,930 84,779 355,552 .431 .805

2050 . . . . . . . . . . . . . . 72,702 195,904 87,646 356,251 .447 .819

2055 . . . . . . . . . . . . . . 71,592 194,086 90,645 356,322 .467 .836

2060 . . . . . . . . . . . . . . 70,371 191,532 94,187 356,090 .492 .859

2065 . . . . . . . . . . . . . . 69,112 189,232 97,338 355,682 .514 .880

2070 . . . . . . . . . . . . . . 67,905 186,190 100,889 354,984 .542 .907

2075 . . . . . . . . . . . . . . 66,800 183,614 103,430 353,844 .563 .927

2080 . . . . . . . . . . . . . . 65,787 180,812 105,571 352,170 .584 .948

1 Population aged 65 and over, divided by population aged 20-64.

2 Sum of population aged 65 and over, and population under age 20, divided by population aged 20-64.

Table V.A2.—Social Security Area Population as of July 1 and Dependency Ratios,

Calendar Years 1950-2080 (Cont.)

Calendar year

Population (in thousands) Dependency ratio

Under 20 20-64

65 and

over Total Aged1 Total2
79

Demographic Assumptions and Methods

year. It is thus closely related to the age-sex-adjusted death rate that is discussed in section V.A.2. Period life expectancy for a particular year may be

viewed as the expected remaining life at a selected age only if it is assumed

that there is no change in death rates after that year.

Cohort life expectancy truly answers the question “What is the expected

average remaining lifetime for an individual at a selected age in a given

year?” Cohort life expectancies are calculated using death rates not from a

single year, but from the series of years in which the individual will actually

reach each succeeding age if he or she survives. Cohort life expectancies are

shown in table V.A4 for those born on January 1 of each calendar year, and

for those attaining age 65 on January 1 of each calendar year.

Tables V.A3 and V.A4 present historical and projected life expectancies calculated on both period and cohort bases. Cohort life expectancies are somewhat greater than period life expectancies for the same year. This is because

death rates for any given age tend to decline as time passes and the cohort

grows older.
Assumptions & Methods

80

Table V.A3.—Period Life Expectancies1

1The period life expectancy at a given age for a given year represents the average number of years of life

remaining if a group of persons at that age were to experience the mortality rates for that year over the course

of their remaining lives.

Calendar

year

Low Cost Intermediate High Cost

At birth At age 65 At birth At age 65 At birth At age 65

Male Female Male Female Male Female Male Female Male Female Male Female

Historical data:

1940 . . . . 61.4 65.7 11.9 13.4

1945 . . . . 62.9 68.4 12.6 14.4

1950 . . . . 65.6 71.1 12.8 15.1

1955 . . . . 66.7 72.8 13.1 15.6

1960 . . . . 66.7 73.2 12.9 15.9

1965 . . . . 66.8 73.8 12.9 16.3

1970 . . . . 67.2 74.9 13.1 17.1

1975 . . . . 68.7 76.6 13.7 18.0

1980 . . . . 69.9 77.5 14.0 18.4

1985 . . . . 71.1 78.2 14.4 18.6

1990 . . . . 71.8 78.9 15.1 19.1

1991 . . . . 72.0 79.0 15.2 19.2

1992 . . . . 72.3 79.2 15.3 19.3

1993 . . . . 72.1 79.0 15.2 19.0

1994 . . . . 72.3 79.1 15.3 19.1

1995 . . . . 72.5 79.1 15.4 19.1

1996 . . . . 73.0 79.2 15.5 19.1

1997 . . . . 73.4 79.4 15.6 19.1

1998 . . . . 73.7 79.4 15.7 19.1

1999 . . . . 73.8 79.3 15.7 19.0

2000 . . . . 74.0 79.4 15.9 19.0

2001 . . . . 74.1 79.5 16.1 19.1

20022 . . . 74.4 79.5 16.0 19.0

20032 . . . 74.5 79.5 16.1 19.0

20042 . . .

2 Preliminary or estimated.

74.6 79.6 16.2 19.0

Projected:

2005 . . . . 74.7 79.6 16.2 19.0 74.8 79.6 16.2 19.0 74.9 79.7 16.3 19.1

2010 . . . . 75.0 79.6 16.3 18.9 75.4 80.0 16.6 19.2 75.9 80.4 16.8 19.5

2015 . . . . 75.2 79.7 16.4 19.0 76.0 80.4 16.9 19.4 76.8 81.1 17.4 19.9

2020 . . . . 75.5 80.0 16.5 19.1 76.5 80.8 17.2 19.7 77.7 81.8 17.9 20.5

2025 . . . . 75.8 80.2 16.6 19.2 77.0 81.2 17.5 20.0 78.6 82.6 18.5 21.0

2030 . . . . 76.0 80.4 16.8 19.3 77.5 81.7 17.8 20.3 79.4 83.3 19.0 21.5

2035 . . . . 76.3 80.6 16.9 19.4 78.0 82.1 18.1 20.6 80.2 84.0 19.5 22.0

2040 . . . . 76.5 80.8 17.0 19.5 78.5 82.5 18.4 20.9 80.9 84.7 20.0 22.5

2045 . . . . 76.8 81.0 17.1 19.7 78.9 82.9 18.7 21.2 81.7 85.3 20.5 23.0

2050 . . . . 77.0 81.2 17.2 19.8 79.4 83.2 18.9 21.4 82.4 85.9 21.0 23.4

2055 . . . . 77.3 81.3 17.3 19.9 79.8 83.6 19.2 21.7 83.1 86.5 21.5 23.9

2060 . . . . 77.5 81.5 17.4 20.0 80.2 83.9 19.5 21.9 83.7 87.1 22.0 24.4

2065 . . . . 77.7 81.7 17.6 20.1 80.6 84.3 19.7 22.2 84.4 87.7 22.4 24.8

2070 . . . . 77.9 81.9 17.7 20.2 81.0 84.6 20.0 22.4 85.0 88.2 22.9 25.2

2075 . . . . 78.1 82.0 17.8 20.3 81.3 84.9 20.2 22.7 85.6 88.7 23.3 25.6

2080 . . . . 78.3 82.2 17.9 20.4 81.7 85.2 20.5 22.9 86.2 89.3 23.7 26.1
81

Demographic Assumptions and Methods

Table V.A4.—Cohort Life Expectancies1

1The cohort life expectancy at a given age for a given year represents the average number of years of life

remaining if a group of persons at that age were to experience the mortality rates for the series of years in

which they reach each succeeding age.

Calendar

year

Low Cost Intermediate High Cost

At birth2

2 Cohort life expectancies at birth for those born on January 1 of the calendar year are based on a combination of actual and projected data for birth years prior to 2002. For birth years after 2001, these values are

based on projected data.

At age 65 3

3 Age 65 cohort life expectancies for those attaining age 65 on January 1 of the calendar year are based on

actual data prior to 1970. For 1970 through 2001, these values are based on a combination of actual and projected data. After 2001, these values are based on projected data.

At birth2 At age 653 At birth2 At age 65 3

Male Female Male Female Male Female Male Female Male Female Male Female

1940 . . . . 69.2 75.2 12.7 14.7 69.6 75.8 12.7 14.7 70.0 76.3 12.7 14.7

1945 . . . . 70.7 76.6 13.0 15.4 71.2 77.3 13.0 15.4 71.9 78.1 13.0 15.4

1950 . . . . 71.7 77.6 13.1 16.2 72.5 78.5 13.1 16.2 73.4 79.5 13.1 16.2

1955 . . . . 72.2 78.0 13.1 16.7 73.2 79.1 13.1 16.7 74.5 80.5 13.1 16.7

1960 . . . . 72.7 78.3 13.2 17.4 73.9 79.6 13.2 17.4 75.5 81.2 13.2 17.4

1965 . . . . 73.3 78.6 13.5 18.0 74.7 80.1 13.5 18.0 76.6 82.1 13.5 18.0

1970 . . . . 74.1 79.2 13.8 18.5 75.8 80.9 13.8 18.5 78.0 83.2 13.8 18.5

1975 . . . . 74.8 79.7 14.2 18.7 76.7 81.6 14.2 18.7 79.3 84.2 14.2 18.7

1980 . . . . 75.4 80.2 14.7 18.7 77.6 82.3 14.7 18.7 80.5 85.1 14.7 18.8

1985 . . . . 75.9 80.5 15.2 18.8 78.3 82.8 15.2 18.8 81.5 86.0 15.2 18.9

1990 . . . . 76.3 80.8 15.6 18.8 78.9 83.3 15.7 19.0 82.5 86.7 15.8 19.2

1991 . . . . 76.4 80.9 15.7 18.9 79.0 83.4 15.8 19.0 82.7 86.9 15.9 19.2

1992 . . . . 76.4 80.9 15.7 18.9 79.2 83.5 15.9 19.1 82.9 87.0 16.0 19.3

1993 . . . . 76.5 81.0 15.8 18.9 79.3 83.6 15.9 19.1 83.0 87.2 16.1 19.3

1994 . . . . 76.6 81.0 15.9 18.9 79.4 83.7 16.0 19.1 83.2 87.3 16.2 19.4

1995 . . . . 76.7 81.1 16.0 18.9 79.5 83.8 16.1 19.2 83.4 87.5 16.3 19.5

1996 . . . . 76.8 81.1 16.0 18.9 79.6 83.9 16.2 19.2 83.6 87.7 16.5 19.5

1997 . . . . 76.8 81.2 16.1 18.9 79.7 84.0 16.3 19.3 83.8 87.8 16.6 19.6

1998 . . . . 76.9 81.2 16.2 18.9 79.8 84.0 16.4 19.3 83.9 87.9 16.7 19.7

1999 . . . . 76.9 81.3 16.2 18.9 79.9 84.1 16.5 19.3 84.1 88.0 16.8 19.8

2000 . . . . 77.0 81.3 16.3 19.0 80.0 84.2 16.6 19.4 84.2 88.2 17.0 19.9

2001 . . . . 77.0 81.4 16.3 19.0 80.1 84.3 16.7 19.4 84.4 88.3 17.1 20.0

2002 . . . . 77.1 81.4 16.3 19.0 80.2 84.4 16.7 19.5 84.6 88.4 17.2 20.1

2003 . . . . 77.1 81.4 16.4 19.0 80.3 84.4 16.8 19.6 84.7 88.6 17.3 20.2

2004 . . . . 77.2 81.5 16.4 19.0 80.4 84.5 16.9 19.6 84.9 88.7 17.4 20.3

2005 . . . . 77.2 81.5 16.4 19.0 80.5 84.6 17.0 19.7 85.0 88.8 17.6 20.4

2010 . . . . 77.5 81.7 16.6 19.1 81.0 85.0 17.3 20.0 85.8 89.5 18.2 20.9

2015 . . . . 77.7 81.9 16.7 19.3 81.4 85.3 17.6 20.3 86.5 90.1 18.8 21.5

2020 . . . . 78.0 82.1 16.8 19.4 81.8 85.7 17.9 20.6 87.1 90.6 19.3 22.0

2025 . . . . 78.2 82.3 16.9 19.5 82.2 86.0 18.2 20.9 87.8 91.2 19.9 22.6

2030 . . . . 78.4 82.4 17.0 19.6 82.6 86.3 18.5 21.2 88.4 91.7 20.4 23.1

2035 . . . . 78.6 82.6 17.2 19.7 82.9 86.6 18.8 21.4 89.0 92.2 21.0 23.6

2040 . . . . 78.8 82.8 17.3 19.9 83.3 86.9 19.1 21.7 89.5 92.7 21.5 24.1

2045 . . . . 79.0 82.9 17.4 20.0 83.6 87.2 19.4 22.0 90.1 93.2 22.0 24.6

2050 . . . . 79.2 83.1 17.5 20.1 84.0 87.5 19.7 22.2 90.6 93.7 22.5 25.0

2055 . . . . 79.4 83.2 17.6 20.2 84.3 87.7 19.9 22.5 91.2 94.1 23.0 25.5

2060 . . . . 79.6 83.3 17.7 20.3 84.6 88.0 20.2 22.7 91.7 94.6 23.5 26.0

2065 . . . . 79.7 83.5 17.8 20.4 84.9 88.3 20.4 23.0 92.1 95.0 23.9 26.4

2070 . . . . 79.9 83.6 17.9 20.5 85.2 88.5 20.7 23.2 92.6 95.4 24.4 26.8

2075 . . . . 80.1 83.7 18.0 20.6 85.5 88.8 20.9 23.4 93.1 95.8 24.8 27.3

2080 . . . . 80.2 83.9 18.1 20.7 85.8 89.0 21.1 23.7 93.6 96.2 25.2 27.7
Assumptions & Methods

82

B. ECONOMIC ASSUMPTIONS AND METHODS

The basic economic assumptions are embodied in three alternatives that are

designed to provide a reasonable range of effects on Social Security’s financial status. The intermediate assumptions reflect the Trustees’ consensus

expectation of moderate economic growth throughout the projection period.

The low cost assumptions represent a more optimistic outlook, with relatively strong economic growth. The high cost assumptions represent a relatively pessimistic scenario, with weak economic growth and two recessions

in the short-range period. Based on the latest estimates, the economy is

assumed to be at its potential level of output and employment in the latter

half of 2004.

Under all three sets of assumptions the economy is assumed to be at the sustainable, potential level of output by the end of the short-range period. Economic cycles are not included in the assumptions beyond the first 5 to 10

years of the projection period because they have little effect on the longrange estimates of financial status. 

This report also includes a stochastic projection that provides a probability

distribution of possible future outcomes that is centered around the Trustees’

intermediate assumptions. Additional economic assumptions and modeling

are required for these projections. These are discussed in appendix E.

The following sections 1 through 4 discuss the principal economic assumptions for the three alternatives that are summarized in table V.B1. The subsequent sections 5 through 7 discuss additional economic factors, summarized

in table V.B2, that are critical to the projections of the future financial status

of the combined OASI and DI Trust Funds.

1. Productivity Assumptions

Total U.S. economy productivity is defined as the ratio of real gross domestic

product (GDP) to hours worked by all workers.1 The rate of change in total

productivity is a major determinant in the growth of average earnings. For

the 40 years from 1963 to 2003, annual increases in total productivity averaged 1.8 percent, the result of average annual increases of 2.5, 1.1, 1.5, and

2.0 percent for the 10-year periods 1963-73, 1973-83, 1983-93, and

1993-2003, respectively. 

 1 Historical levels of real GDP are from the Bureau of Economic Analysis’ (BEA) National Income and

Product Accounts (NIPA). Historical total hours worked is an unpublished series provided by the Bureau of

Labor Statistics (BLS), and is for all civilian and military wage and salary workers and the self-employed.
83

Economic Assumptions and Methods

However, productivity growth can vary substantially within economic

cycles. Therefore, it is more useful to consider historical average growth

rates for complete economic cycles. The annual increase in total productivity

averaged 1.6 percent over the last four complete economic cycles (measured

from peak to peak), covering the 34-year period from 1966 to 2000. The

annual increase in total productivity averaged 2.2, 1.2, 1.3, and 1.6 percent

over the business cycles 1966-73, 1973-78, 1978-89, 1989-2000, respectively. The ultimate annual increases in productivity are assumed to be 1.9,

1.6, and 1.3 percent for the low cost, intermediate, and high cost assumptions, respectively. These are the same as the ultimate rates assumed for the

2004 report.

For the intermediate assumptions, the annual change in productivity is

assumed to decrease from 3.3 percent for 2004 to 2.0 percent for 2005 and

2006, then to an average of 1.8 percent for the years 2007 to 2009. Though

declining, these changes are relatively strong by historical standards. After

2009, the annual change in productivity gradually decreases to the ultimate

assumed level of 1.6 percent by 2013. For the low cost assumptions, the

annual change in productivity decreases gradually from 3.2 percent for 2004

to the ultimate assumed level of 1.9 percent by 2012. For the high cost

assumptions, the annual change in productivity decreases from 3.1 percent

for 2004 to 0.5 percent for 2005. Thereafter, the annual change in productivity varies with the business cycle until reaching its ultimate growth rate of

1.3 percent for 2014.

As with other assumptions, a range of opinions exists among experts. We

will continue to closely monitor experience in this area, particularly in light

of recent rapid productivity growth that is not fully explained.

2. Price Inflation Assumptions

Future changes in the Consumer Price Index for Urban Wage Earners and

Clerical Workers (hereafter denoted as CPI) will directly affect the OASDI

program through the automatic cost-of-living benefit increases. Future

changes in the GDP chain-type price index (hereafter, the GDP deflator)

affect the nominal levels of the GDP, wages, self-employment income, average earnings, and the taxable payroll.

Historically, the CPI has increased by an average of 4.5 percent for the 40

years from 1963 to 2003, the result of average annual increases of 3.8, 8.4,

3.6, and 2.4 percent for the 10-year periods 1963-73, 1973-83, 1983-93, and

1993-2003, respectively. The GDP deflator has increased by 4.0 percent for

1963 to 2003, and by 3.9, 7.4, 3.1, and 1.8 percent annually for the same
Assumptions & Methods

84

respective 10-year periods. It should be noted that several methodological

changes made by the Bureau of Labor Statistics in methods for computing

the CPI since 1995 will tend to reduce the difference between the growth

rates of these indices in the future.

The ultimate annual increases in the CPI are assumed to be 1.8, 2.8, and

3.8 percent for the low cost, intermediate, and high cost assumptions, respectively. These rates of increase are the same as those used in the 2004 report,

and reflect a growing belief that future inflationary shocks will more likely

be offsetting and that future monetary policy will be more like the recent

past, with its strong emphasis on holding the growth rate in prices to relatively low levels.

For each alternative, the ultimate annual increase in the GDP deflator is

assumed to be equal to the sum of the annual increases in the CPI and a

-0.3 percentage point price differential. This differential is the same one used

in the 2004 report and is based primarily on methodological differences in

the construction of the two indices. Hence, for the intermediate assumptions,

the ultimate annual increase in the GDP deflator is 2.5 percent, the sum of

the 2.8 percent assumed ultimate annual increase in the CPI and the

-0.3 percentage point price differential. Similarly, the ultimate annual

increases in the GDP deflator are 1.5 and 3.5 percent for the low cost and

high cost assumptions, respectively.

For the intermediate assumptions, the annual change in the CPI is assumed to

decrease from 2.6 percent for 2004 to 2.2 percent for 2005. Thereafter, the

annual change in the CPI increases gradually to the assumed ultimate rate of

2.8 percent as of 2008. For the low cost assumptions, the annual change in

the CPI decreases from 2.0 percent for 2005 to 1.7 percent for 2006, then

rises to the assumed ultimate rate of 1.8 percent for 2007. For the high cost

assumptions, the annual change in the CPI mostly increases from 2.5 percent

for 2004 to 5.7 percent for 2009, then decreases to its assumed ultimate rate

of 3.8 percent as of 2013. The price differential, defined as the percent

change in the GDP deflator less the CPI percent change, is -0.4 percentage

point in 2004. For all three alternatives, the price differential is projected to

be approximately -0.5 percentage point for 2005, -0.4 percentage point for

2006, and -0.3 percentage point for 2007 and later.

3. Average Earnings Assumptions

The level of average (nominal) earnings in OASDI covered employment for

each year has a direct effect on the size of the taxable payroll and on the

future level of average benefits. In addition, increases in the level of average
85

Economic Assumptions and Methods

wages in the U.S. economy directly affect the indexation, under the automatic-adjustment provisions in the law, of the OASDI benefit formulas, the

contribution and benefit base, the exempt amounts under the retirement earnings test, the amount of earnings required for a quarter of coverage, and

under certain circumstances, the automatic cost-of-living benefit increases.

This covered earnings concept is closely linked to average U.S. earnings,

defined as the ratio of the sum of total U.S. wage and salary disbursements

and proprietor income to the sum of total U.S. military and total civilian

(household) employment. The growth rates in average U.S. earnings can be

broken down into the growth rates for total U.S. economy productivity and

the GDP price index (see previous two sections), and the growth rates for

other components, including average hours worked, the ratio of earnings to

compensation (which includes fringe benefits), and the ratio of compensation

to GDP.

The average annual change in average hours worked was -0.2 percent over

the last 40 years, and -0.3, -0.5, 0.1, and -0.1 percent for the 10-year periods

1963-73, 1973-83, 1983-93 and 1993-2003, respectively. Though the historical data by 10-year periods suggest that the future trend growth rate in average hours worked may be positive, other evidence indicates differently.

Some of the recent increase in the average percent change in average hours

worked is believed to be associated with changes in the distribution of

employment by age/sex and by educational attainment. In the future, these

distributions are expected to be much more stable than in recent decades. 

For the 2005 report, the ultimate annual rates of change for average hours

worked are assumed to be 0.1, 0.0, and -0.1 percent for the low cost, intermediate, and high cost assumptions, respectively. These ultimate annual rates of

change for average hours worked are the same as those assumed for the 2004

report.

The average annual change in the ratio of earnings to compensation was

-0.3 percent from 1963 to 2003. For wage workers, the assumed ultimate

annual rates of change are -0.1, -0.2, and -0.3 percent for the ratio of earnings

to compensation, for the low cost, intermediate, and high cost assumptions,

respectively. Under the intermediate assumptions, the ratio of wages to

employee compensation is projected to decline from 0.806 for 2004 to 0.696

for 2079. The ratio of compensation to GDP is assumed to be stable.

Thus, the ultimate projected annual growth rate in average U.S. earnings is

about 3.9 percent for the intermediate assumptions. This reflects assumed

ultimate annual growth rates of about 1.6, -0.2, 0.0, and 2.5 percent for productivity, the ratio of earnings to compensation, average hours worked, and
Assumptions & Methods

86

the GDP deflator, respectively. Similarly, the ultimate projected annual

growth rate in average nominal U.S. earnings is 3.4 percent for the low cost

assumptions and 4.5 percent for the high cost assumptions.

Over long periods of time the average annual growth rates in average U.S.

earnings and average earnings in OASDI covered employment are expected

to be very close to the average annual growth rates in the average wage in

OASDI covered employment (henceforth the average covered wage). Thus,

the assumed ultimate annual growth rates in the average covered wage are

3.4, 3.9, and 4.4 percent for the low cost, intermediate, and high cost

assumptions, respectively. For the intermediate assumptions, the annual rate

of change in the average covered wage is assumed to rise from the estimated

3.8 percent increase for 2004 to an average of 4.3 percent over the 2005 to

2008 period, then to fall to an average of 4.1 percent from 2009 to 2013.

Thereafter, the annual rate of change in the average covered wage moves to

its assumed ultimate annual growth rate of 3.9 percent for 2014.

4. Assumed Real-Wage Differentials

For simplicity, real increases in the average OASDI covered wage have traditionally been expressed in the form of real-wage differentials—i.e., the percentage change in the average covered wage minus the percentage change in

the CPI. This differential is closely related to assumed growth rates in average earnings and productivity, which are discussed in the previous section.

Over the 40-year period, 1964-2003, the real-wage differential averaged

1.0 percentage point, the result of averages of 1.8, -0.5, 0.9, and

1.6 percentage points for the 10-year periods 1964-73, 1974-83, 1984-93,

and 1994-2003, respectively. The assumed ultimate annual average covered

real-wage differentials are 1.6, 1.1, and 0.6 percentage point(s) for the low

cost, intermediate, and high cost assumptions, respectively.

Based on preliminary data, the real-wage differential was 1.2 percentage

points for 2004. For the intermediate assumptions, the real-wage differential

is projected to rise to about 2.1 and 2.2 percentage points in 2005 and 2006,

respectively. The real-wage differential is then projected to fall to

1.8 percentage points for 2007, 1.5 percentage points for 2008, and to the

ultimate assumed differential of 1.1 percentage points (3.9 percent nominal

wage growth less 2.8 percent CPI inflation) by 2014.

For the low cost assumptions, the real-wage differential is assumed to be in

the range of 1.2 percentage points to 2.4 percentage points between 2004 and

2012, moving to the ultimate assumed real-wage differential of

1.6 percentage points thereafter. For the high cost assumptions, the real-wage
87

Economic Assumptions and Methods

differential for the short-range period is projected to fluctuate between -0.7

and 2.6 percentage points, eventually stabilizing at about 0.6 percentage

point for 2013 and later.

Table V.B1.—Principal Economic Assumptions

Calendar year 

Annual percentage increase in—

Realwage

differential1

Productivity

(Total U.S.

economy)

Earnings as

a percent of

compensation

Average

hours

worked

GDP

price

index

Average

annual wage

in covered

employment

Consumer

Price

Index

Historical data:

1960 to 1965. . . . 3.2 -0.2 0.2 1.4 3.2 1.2 2.0

1965 to 1970. . . . 1.9 -.4 -.6 4.1 5.8 4.2 1.6

1970 to 1975. . . . 2.1 -.7 -.9 6.7 6.6 6.8 -.2

1975 to 1980. . . . 1.0 -.6 -.2 7.3 8.7 8.9 -.3

1980 to 1985. . . . 1.7 -.2 .0 5.2 6.7 5.2 1.4

1985 to 1990. . . . 1.3 .1 -.1 3.2 4.7 3.8 .9

1990 to 1995. . . . 1.1 -.2 .4 2.5 3.6 3.0 .6

1995 to 2000. . . . 2.1 .4 .1 1.7 5.3 2.4 2.9

1994 . . . . . . . . . . .9 -.3 .8 2.1 3.7 2.5 1.3

1995 . . . . . . . . . . .1 .7 1.0 2.0 4.7 2.9 1.8

1996 . . . . . . . . . . 2.4 1.1 -.1 1.9 4.0 2.9 1.1

1997 . . . . . . . . . . 1.5 .8 .8 1.7 5.6 2.3 3.4

1998 . . . . . . . . . . 1.9 .2 .8 1.1 6.2 1.3 4.8

1999 . . . . . . . . . . 2.3 .1 .5 1.4 4.8 2.2 2.6

2000 . . . . . . . . . . 2.4 .1 -1.2 2.2 6.1 3.5 2.6

2001 . . . . . . . . . . 2.0 -.3 -1.3 2.4 2.0 2.7 -.8

2002 . . . . . . . . . . 3.2 -1.3 -1.0 1.7 .4 1.4 -1.0

2003 . . . . . . . . . . 3.5 -.8 -1.4 1.8 2.6 2.2 .4

2004 . . . . . . . . . . 3.3 -.5 .0 2.2 3.8 2.6 1.2

Intermediate: 

2005 . . . . . . . . . . 2.0 -.4 -.1 1.6 4.2 2.2 2.1

2006 . . . . . . . . . . 2.0 .0 .0 1.8 4.3 2.2 2.2

2007 . . . . . . . . . . 1.8 -.1 .0 2.3 4.4 2.6 1.8

2008 . . . . . . . . . . 1.8 -.1 .0 2.5 4.3 2.8 1.5

2009 . . . . . . . . . . 1.8 -.1 .0 2.5 4.1 2.8 1.3

2010 . . . . . . . . . . 1.7 -.1 .0 2.5 4.1 2.8 1.3

2011 . . . . . . . . . . 1.7 -.1 .0 2.5 4.1 2.8 1.3

2012 . . . . . . . . . . 1.7 -.1 .0 2.5 4.2 2.8 1.4

2013 . . . . . . . . . . 1.6 -.1 .0 2.5 4.0 2.8 1.2

2014 . . . . . . . . . . 1.6 -.2 .0 2.5 3.9 2.8 1.1

2010 to 2015. . . . 1.6 -.1 .0 2.5 4.0 2.8 1.2

2015 to 2080. . . . 1.6 -.2 .0 2.5 3.9 2.8 1.1

Low Cost: 

2005 . . . . . . . . . . 2.1 -.4 -.1 1.5 4.2 2.0 2.2

2006 . . . . . . . . . . 2.2 .0 .1 1.4 4.1 1.7 2.4

2007 . . . . . . . . . . 2.2 .0 .1 1.5 4.1 1.8 2.3

2008 . . . . . . . . . . 2.2 .0 .1 1.5 3.9 1.8 2.1

2009 . . . . . . . . . . 2.1 .0 .1 1.5 3.7 1.8 1.9

2010 . . . . . . . . . . 2.0 -.1 .1 1.5 3.7 1.8 1.9

2011 . . . . . . . . . . 2.0 -.1 .1 1.5 3.6 1.8 1.8

2012 . . . . . . . . . . 1.9 -.1 .1 1.5 3.7 1.8 1.9

2013 . . . . . . . . . . 1.9 -.1 .1 1.5 3.5 1.8 1.7

2014 . . . . . . . . . . 1.9 -.1 .1 1.5 3.4 1.8 1.6

2010 to 2015. . . . 1.9 -.1 .1 1.5 3.5 1.8 1.7

2015 to 2080. . . . 1.9 -.1 .1 1.5 3.4 1.8 1.6
Assumptions & Methods

88

5. Labor Force and Unemployment Projections

The civilian labor force is projected by age, sex, marital status, and presence

of children. Projections of the labor force participation rates for each subgroup take into account the percentages of the population that are disabled or

in the military, the levels of Social Security retirement benefits, the state of

the economy, and changes in life expectancy. The projections also include a

“lagged-cohort effect” that applies changes in participation rates for a cohort

at a specific age (relative to earlier cohorts at the same age) to participation

rates for that cohort at older ages.

The annual rate of growth in the size of the labor force decreased from an

average of about 2.1 percent during the 1970s and 1980s to about 1.2 percent

from 1990 to 2003. Further slowing of labor force growth is projected due to

a substantial slowing of growth in the working age population in the future—

a natural consequence of the baby-boom generation approaching retirement

and the succeeding lower-birth-rate cohorts reaching working age. Under the

intermediate assumptions, the labor force is projected to increase by about

0.9 percent per year, on average, through 2014. Thereafter, the labor force is

projected to increase much more slowly, averaging about 0.3 percent over

the 30-year period from 2015 to 2045, and 0.2 percent over the remainder of

the 75-year projection period.

High Cost: 

2005 . . . . . . . . . . 0.5 -0.5 -0.2 2.2 2.5 2.7 -0.2

2006 . . . . . . . . . . 2.7 -.1 -.1 2.2 5.2 2.6 2.6

2007 . . . . . . . . . . 1.7 -.1 -.1 2.5 4.6 2.8 1.8

2008 . . . . . . . . . . .1 -.2 -.1 4.1 3.7 4.4 -.7

2009 . . . . . . . . . . 1.9 -.1 -.1 5.4 6.6 5.7 .9

2010 . . . . . . . . . . 2.0 -.3 -.1 5.3 7.3 5.6 1.7

2011 . . . . . . . . . . 1.2 -.3 -.1 4.4 5.4 4.7 .7

2012 . . . . . . . . . . 1.2 -.3 -.1 3.6 4.6 3.9 .7

2013 . . . . . . . . . . 1.2 -.2 -.1 3.5 4.4 3.8 .6

2014 . . . . . . . . . . 1.3 -.3 -.1 3.5 4.3 3.8 .5

2010 to 2015. . . . 1.2 -.3 -.1 3.7 4.6 4.0 .6

2015 to 2080. . . . 1.3 -.3 -.1 3.5 4.4 3.8 .6

1The real-wage differential is the difference between the percentage increases, before rounding, in the average annual wage in covered employment, and the average annual Consumer Price Index.

Table V.B1.—Principal Economic Assumptions (Cont.)

Calendar year 

Annual percentage increase in—

Realwage

differential1

Productivity

(Total U.S.

economy)

Earnings as

a percent of

compensation

Average

hours

worked

GDP

price

index

Average

annual wage

in covered

employment

Consumer

Price

Index
89

Economic Assumptions and Methods

The ultimate projected labor force participation rates are not basic assumptions. They are derived from a historically-based structural relationship using

demographic and economic assumptions specific to each alternative. Little

variation in the structural relationship is assumed, and participation rates are

not highly sensitive to most of the demographic and economic assumptions.

Thus, the ultimate projected labor force participation rates vary modestly

into the future, and across alternatives. 

Historically, labor force participation rates have been influenced substantially by trends in demographics and pensions. Between the mid-1960s and

the mid-1980s, labor force participation rates at ages 50 and over declined

for males and were fairly stable for females. These overall declines were

likely due in large part to the large numbers of workers entering the labor

force from the baby-boom generation, and from the female population in

general, during this period. This large supply of labor allowed employers to

offer early-retirement options that were attractive. Between the mid-1980s

and about 1995, these rates roughly stabilized for males and increased for

females. Since 1995, however, participation rates at ages 50 and over have

generally risen significantly, reflecting a decrease in early-out options and

relatively strong economic growth. 

For the future, changes in available benefit levels from Social Security and

increases in the normal retirement age, and the effects of modifying the earnings test are expected to encourage work at higher ages. Some of these factors are modeled directly. However, other factors, like the trend away from

defined benefit pension plans that often provided incentives to retire and

toward defined contribution plans, are expected to provide additional upward

pressure on labor force participation rates. In addition to this shift in private

pensions, the aging of the population is expected to both increase the demand

for workers and, through improved health associated with greater life expectancy, improve the ability of the older population to work. Longer life expectancy will also increase the amount of assets that will be needed to live

comfortably through retirement years, also influencing workers to stay

employed longer. In order to account for these effects, which are directly or

indirectly related to increases in life expectancy, projected participation rates

for prime age and older males and females are adjusted upward in relation to

assumed increases in life expectancy. For the intermediate projections, this

adjustment for changes related to life expectancy results in a total labor force

that is about 1.5 percent higher by 2080.

For men age 16 and over, the projected age-adjusted labor force participation

rates for 2080 are 72.8, 73.5, and 74.1 percent for the low cost, intermediate,

and high cost assumptions, respectively, compared to the 2003 level of
Assumptions & Methods

90

73.6 percent. (Age-adjusted labor force participation rates are adjusted to the

2003 age distribution of the civilian noninstitutional U.S. population.) These

reflect the net effect of increases due to assumed improvements in life

expectancy, and decreases due to higher assumed disability prevalence rates

and an increasing proportion of males who are never married. For women

age 16 and over, the projected age-adjusted labor force participation rates for

2080 are 61.3, 61.4, and 61.3 percent, for the low cost, intermediate, and

high cost assumptions, respectively, compared to the 2003 level of

59.8 percent. These projections are the net effect of decreases due to higher

assumed disability prevalence rates, increases due to assumed improvements

in life expectancy, and increases due to assumed changes in the proportion of

females who are never married, separated, widowed, or divorced.

The unemployment rate presented in table V.B2 is in the most commonly

cited form, the civilian rate. For years through 2014, total rates are presented

without adjustment for changes in the age-sex distribution of the population.

For years after 2014, unemployment rates are presented as total age-sex

adjusted rates (using the age-sex distribution of the 2003 civilian labor

force). Age-sex adjusted rates allow for more meaningful comparisons

across longer time periods.

The total unemployment rate reflects the projected levels of unemployment

for various age-sex subgroups of the population. The unemployment rate for

each subgroup is projected based on a specification (consistent with Okun’s

Law) relating changes in the unemployment rate to the changes in the business cycle, as measured by the ratio of the actual to potential GDP. For each

alternative, the total unemployment rate is projected to move toward the ultimate assumed rate as the economy moves toward the long-range sustainable

growth path.

The ultimate age-sex-adjusted unemployment rate for each alternative is

assumed to be reached by 2014. After 2014, the age-sex-adjusted rate is stable because the ratio of actual to potential GDP is assumed to be constant.

The ultimate assumed unemployment rates are 4.5, 5.5, and 6.5 percent for

the low cost, intermediate, and high cost assumptions, respectively. These are

the same values assumed for the 2004 report.

6. Gross Domestic Product Projections

The real growth rate in gross domestic product (GDP) equals the combined

growth rates for total employment, productivity, and average hours worked.

Total employment is the sum of the U.S. Armed Forces and total civilian

employment, which is based on the projected total civilian labor force and
91

Economic Assumptions and Methods

unemployment rates. For the 40-year period from 1963 to 2003, the average

growth rate in real GDP was 3.3 percent, combining the approximate growth

rates of 1.7, 1.8, and -0.2 percent for its components—total employment,

productivity, and average hours worked, respectively.

For the intermediate assumptions, the average annual growth in real GDP is

projected to be 2.7 percent over the short-range projection period (2005-14),

a slower rate than the 3.3 percent average observed over the historical

40-year period (1963-2003). This slowdown is primarily due to slower projected growth in total employment. For the low cost assumptions, annual

growth in real GDP is projected to average 3.3 percent over the decade ending in 2014. The relatively faster growth is due mostly to a higher assumed

rate of growth in worker productivity. For the high cost assumptions, real

GDP is assumed to fall in the last quarter of 2004 and the first and second

quarters of 2005, resulting in a total decline in real GDP of 1.2 percent. After

11 quarters of recovery, a second recession, with a total decline in real GDP

of 1.7 percent, is assumed to begin in the second quarter of 2008 and last

3 quarters. After the second recession, a moderate economic recovery is

assumed through 2011, with continued modest economic growth thereafter.

For the high cost assumptions, annual growth in real GDP is projected to

average 2.0 percent for the decade ending in 2014.

After 2014, no economic cycles are assumed for the three alternatives. Thus,

projected rates of growth in real GDP are determined by the projected fullemployment rate of growth for total employment, and the assumed fullemployment rates of growth for total U.S. economy productivity and average

hours worked. For the intermediate assumptions, the projected rate of growth

for real GDP falls toward the assumed productivity growth rate because of

the projected decline in labor force growth over the period. By 2080, the

growth in real GDP slows to about 1.8 percent, due to the assumed ultimate

percent changes of 0.2, 1.6, and 0.0 for total employment, productivity, and

average hours worked, respectively. These projected growth rates are the

same as those assumed for the 2004 report.

7. Interest Rate Projections

The interest rate presented in table V.B2 for each year is the average of the

nominal interest rates for special U.S. Government obligations issuable to

the trust funds in each of the 12 months of the year. Interest for these securities is generally compounded semiannually. The real interest rate (ex post) is

defined to be the annual (compounded) yield rate for investments in these

securities divided by the annual rate of growth in the CPI for the first year

after issuance. For 2004, the average annual nominal interest rate for securi-
Assumptions & Methods

92

ties newly issued to the trust funds was 4.3 percent, an increase of

0.2 percentage point from the average nominal interest rate of 4.1 percent for

2003.

In developing a reasonable range of assumed ultimate future real interest

rates for the three alternatives, historical experience was examined for the 40

years, 1964-2003, and for each of the 10-year subperiods, 1964-73, 1974-83,

1984-93, and 1994-2003. For the 40-year period, the real interest rate averaged 2.9 percent per year. For the four 10-year subperiods, the real interest

rates averaged 1.6, 0.8, 5.6, and 3.7 percent, respectively. The assumed ultimate real interest rates are 3.7 percent, 3.0 percent, and 2.2 percent for the

low cost, intermediate, and high cost assumptions, respectively. The ultimate

real yields are assumed to be reached by the end of the short-range period.

These annual real yields are the same as those assumed in the 2004 report.

These ultimate real interest rates, when combined with the ultimate CPI

assumptions of 1.8, 2.8, and 3.8 percent, yield ultimate nominal interest rates

of about 5.5 percent for the low cost assumptions, about 5.8 percent for the

intermediate assumptions, and about 6.0 percent for the high cost assumptions.

For the 10-year short-range projection period, nominal interest rates are projected based on changes in the business cycle and in the CPI. Under the intermediate assumptions, the nominal interest rate is projected to rise from

4.3 percent for 2004 to 5.6 for 2008 and 2009, and to 5.7 percent for 2010,

reflecting a recovering economy along with a higher rate of inflation. Thereafter, the nominal interest rate rises to the ultimate assumed level of

5.8 percent for 2011. For the low cost assumptions, the average annual nominal interest rate is assumed to reach an ultimate level of about 5.5 percent for

2012. For the high cost assumptions, it is assumed to peak at 8.7 percent for

2010, and then decline to an ultimate rate of about 6.0 percent for 2013.
93

Economic Assumptions and Methods

Table V.B2.—Additional Economic Factors

Calendar year 

Average annual

unemployment rate1

(percent)

Annual percentage increase in— Average annual

interest rate2

(percent)

Labor

force3 Total

employment4 RealGDP5

Historical data:

1960 to 1965. . . . . 5.5 1.3 1.6 5.0 4.0

1965 to 1970. . . . . 3.9 2.2 2.1 3.4 5.9

1970 to 1975. . . . . 6.1 2.5 1.5 2.7 6.7

1975 to 1980. . . . . 6.8 2.7 2.9 3.7 8.5

1980 to 1985. . . . . 8.3 1.5 1.5 3.2 12.1

1985 to 1990. . . . . 5.9 1.7 2.0 3.3 8.5

1990 to 1995. . . . . 6.6 1.0 .9 2.5 7.0

1995 to 2000. . . . . 4.6 1.5 1.8 4.1 6.2

1994 . . . . . . . . . . . 6.1 1.4 2.2 4.0 7.1

1995 . . . . . . . . . . . 5.6 1.0 1.4 2.5 6.9

1996 . . . . . . . . . . . 5.4 1.2 1.4 3.7 6.6

1997 . . . . . . . . . . . 4.9 1.8 2.2 4.5 6.6

1998 . . . . . . . . . . . 4.5 1.0 1.4 4.2 5.6

1999 . . . . . . . . . . . 4.2 1.2 1.5 4.4 5.9

2000 . . . . . . . . . . . 4.0 2.3 2.5 3.7 6.2

2001 . . . . . . . . . . . 4.8 .8 .0 .8 5.2

2002 . . . . . . . . . . . 5.8 .8 -.3 1.9 4.9

2003 . . . . . . . . . . . 6.0 1.1 .9 3.0 4.1

2004 . . . . . . . . . . . 5.5 .6 1.1 4.4 4.3

Intermediate: 

2005 . . . . . . . . . . . 5.4 1.6 1.7 3.6 4.2

2006 . . . . . . . . . . . 5.3 1.4 1.5 3.5 5.1

2007 . . . . . . . . . . . 5.3 1.1 1.1 3.0 5.5

2008 . . . . . . . . . . . 5.4 .9 .8 2.7 5.6

2009 . . . . . . . . . . . 5.4 .8 .8 2.5 5.6

2010 . . . . . . . . . . . 5.5 .8 .7 2.5 5.7

2011 . . . . . . . . . . . 5.5 .8 .7 2.4 5.8

2012 . . . . . . . . . . . 5.5 .6 .6 2.3 5.8

2013 . . . . . . . . . . . 5.5 .6 .6 2.2 5.8

2014 . . . . . . . . . . . 5.5 .6 .6 2.1 5.8

2015 . . . . . . . . . . . 5.5 .5 .5 2.1 5.8

2020 . . . . . . . . . . . 5.5 .3 .3 1.9 5.8

2025 . . . . . . . . . . . 5.5 .2 .2 1.8 5.8

2030 . . . . . . . . . . . 5.5 .2 .2 1.8 5.8

2035 . . . . . . . . . . . 5.5 .3 .3 1.9 5.8

2040 . . . . . . . . . . . 5.5 .3 .3 1.9 5.8

2045 . . . . . . . . . . . 5.5 .3 .3 1.8 5.8

2050 to 2080. . . . . 5.5 .2 .2 1.8 5.8

Low Cost: 

2005 . . . . . . . . . . . 5.3 1.6 1.8 3.9 4.2

2006 . . . . . . . . . . . 5.3 1.4 1.5 3.8 4.9

2007 . . . . . . . . . . . 5.2 1.2 1.3 3.6 5.1

2008 . . . . . . . . . . . 5.1 1.1 1.2 3.5 5.2

2009 . . . . . . . . . . . 4.9 1.0 1.1 3.4 5.3

2010 . . . . . . . . . . . 4.8 1.0 1.1 3.3 5.4

2011 . . . . . . . . . . . 4.7 1.0 1.1 3.2 5.4

2012 . . . . . . . . . . . 4.6 .8 .9 3.0 5.5

2013 . . . . . . . . . . . 4.5 .7 .8 2.8 5.5

2014 . . . . . . . . . . . 4.5 .7 .7 2.7 5.5

2015 . . . . . . . . . . . 4.5 .6 .6 2.6 5.5

2020 . . . . . . . . . . . 4.5 .5 .5 2.5 5.5

2025 . . . . . . . . . . . 4.5 .4 .4 2.4 5.5

2030 . . . . . . . . . . . 4.5 .4 .4 2.4 5.5

2035 . . . . . . . . . . . 4.5 .5 .5 2.5 5.5

2040 to 2080. . . . . 4.5 .6 .6 2.6 5.5
Assumptions & Methods

94

High Cost: 

2005 . . . . . . . . . . . 6.4 1.2 0.3 0.6 3.7

2006 . . . . . . . . . . . 6.4 1.1 1.1 3.7 5.7

2007 . . . . . . . . . . . 6.0 1.1 1.4 3.0 5.8

2008 . . . . . . . . . . . 6.5 .7 .2 .2 6.0

2009 . . . . . . . . . . . 7.2 .4 -.3 1.5 7.9

2010 . . . . . . . . . . . 6.6 .9 1.6 3.5 8.7

2011 . . . . . . . . . . . 6.4 .9 1.1 2.2 7.1

2012 . . . . . . . . . . . 6.5 .6 .5 1.6 6.2

2013 . . . . . . . . . . . 6.5 .5 .5 1.6 6.0

2014 . . . . . . . . . . . 6.5 .5 .5 1.6 6.0

2015 . . . . . . . . . . . 6.5 .4 .4 1.6 6.0

2020 . . . . . . . . . . . 6.5 .3 .3 1.5 6.0

2025 . . . . . . . . . . . 6.5 .1 .1 1.3 6.0

2030 . . . . . . . . . . . 6.5 .1 .1 1.3 6.0

2035 . . . . . . . . . . . 6.5 .1 .1 1.3 6.0

2040 . . . . . . . . . . . 6.5 .1 .1 1.3 6.0

2045 . . . . . . . . . . . 6.5 .0 .0 1.2 6.0

2050 . . . . . . . . . . . 6.5 -.1 -.1 1.1 6.0

2055 to 2080. . . . . 6.5 -.2 -.2 1.0 6.0

1The unemployment rates for 2015 and later are adjusted to the age-sex distribution of the civilian labor

force in 2003. All other rates are unadjusted.

2 The average annual interest rate is the average of the nominal interest rates, which, in practice, are compounded semiannually, for special public-debt obligations issuable to the trust funds in each of the 12

months of the year.

3 The U.S. civilian labor force concept is used here.

4 Total of civilian and military employment in the U.S. economy.

5 The real GDP (gross domestic product) is the value of total output of goods and services in 2000 dollars.

Table V.B2.—Additional Economic Factors (Cont.)

Calendar year 

Average annual

unemployment rate1

(percent)

Annual percentage increase in— Average annual

interest rate2

(percent)

Labor

force3 Totalemployment4 RealGDP5
95

Program Assumptions and Methods

C. PROGRAM-SPECIFIC ASSUMPTIONS AND METHODS

The demographic and economic assumptions and methods described in the

previous sections are used in a set of models to project future income and

cost under the OASDI program. In some cases, the economic assumptions

result in the direct calculation of program parameters as described in the following subsection. These parameters affect the level of payroll taxes collected and the level of benefits paid and are calculated using formulas

described explicitly in the Social Security Act. In other cases, the combination of demographic and economic assumptions are used indirectly to drive

more complicated models that project the numbers of future workers covered

under OASDI and the levels of their covered earnings, and the numbers of

future beneficiaries and the expected levels of their benefits. The following

subsections provide brief descriptions of the derivations of these programspecific factors.

1. Automatically Adjusted Program Amounts

The Social Security Act specifies that certain program amounts affecting the

determination of OASDI benefits are to be adjusted annually, in general, to

reflect changes in the economy. The law prescribes specific formulas that,

when applied to reported statistics, produce automatic revisions in these program amounts and hence in the benefit-computation procedures. These automatic adjustments are based upon measured changes in the national average

wage index (AWI) and the CPI.1 In this section, values are shown for program amounts that are subject to automatic adjustment, from the time that

such adjustments became effective through 2014. Projected values for future

years are based on the economic assumptions described in the preceding section of this report.

The following two tables present the historical and projected values of the

CPI-based benefit increases, as well as the AWI series and the values of

many of the wage-indexed program amounts. In each table, the projections

are shown under the three alternative sets of economic assumptions

described in the previous section. Table V.C1 includes:

 • The annual percentage increases which have been applied to OASDI

benefits under automatic cost-of-living adjustment provisions in the

Social Security Act, based on increases in the CPI.

 1 Details of these indexation procedures are published annually in the Federal Register, and are also available on the Internet at www.socialsecurity.gov/OACT/COLA/index.html.
Assumptions & Methods

96

 • The annual levels of and percentage increases in the AWI. Under section 215(b)(3) of the Social Security Act, the AWI for each year after

1950 is used to index the taxable earnings of most workers first becoming eligible for benefits in 1979 or later. This procedure converts a

worker’s past earnings to approximately their equivalent values near the

time of the worker’s retirement or other eligibility, and these indexed

values are used to calculate the worker’s benefit. The AWI is also used

to adjust most of the other program amounts that are subject to the automatic-adjustment provisions.

 • The OASDI contribution and benefit base—the maximum amount of

earnings subject to the OASDI payroll tax in the specified year.

 • The retirement earnings test exempt amounts—the annual amount of

earnings below which beneficiaries are not subject to benefit withholding. A lower exempt amount applies in years before a beneficiary

attains normal retirement age (NRA). A higher amount applies for the

year in which the beneficiary attains normal retirement age. The retirement test does not apply beginning with the attainment of normal retirement age.
97

Program Assumptions and Methods

Table V.C1.—Cost-of-Living Benefit Increases, Average Wage Index, Contribution and 

Benefit Bases, and Retirement Earnings Test Exempt Amounts, 1975-2014

Calendar year

OASDI

benefit

increases1

(percent)

Average

wage index (AWI) 2 OASDI

contribution

and benefit

base 3

Retirement earnings

test exempt amount

Amount

Increase

(percent)

Under

NRA4 At NRA5

Historical data:

1975 . . . . . . . . . . . 8.0 $8,630.92 7.5 $14,100 $2,520 $2,520

1976 . . . . . . . . . . . 6.4 9,226.48 6.9 15,300 2,760 2,760

1977 . . . . . . . . . . . 5.9 9,779.44 6.0 16,500 3,000 3,000

1978 . . . . . . . . . . . 6.5 10,556.03 7.9 17,700 3,240 4,000

1979 . . . . . . . . . . . 9.9 11,479.46 8.7 22,900 3,480 4,500

1980 . . . . . . . . . . . 14.3 12,513.46 9.0 25,900 3,720 5,000

1981 . . . . . . . . . . . 11.2 13,773.10 10.1 29,700 4,080 5,500

1982 . . . . . . . . . . . 7.4 14,531.34 5.5 32,400 4,440 6,000

1983 . . . . . . . . . . . 3.5 15,239.24 4.9 35,700 4,920 6,600

1984 . . . . . . . . . . . 3.5 16,135.07 5.9 37,800 5,160 6,960

1985 . . . . . . . . . . . 3.1 16,822.51 4.3 39,600 5,400 7,320

1986 . . . . . . . . . . . 1.3 17,321.82 3.0 42,000 5,760 7,800

1987 . . . . . . . . . . . 4.2 18,426.51 6.4 43,800 6,000 8,160

1988 . . . . . . . . . . . 4.0 19,334.04 4.9 45,000 6,120 8,400

1989 . . . . . . . . . . . 4.7 20,099.55 4.0 48,000 6,480 8,880

1990 . . . . . . . . . . . 5.4 21,027.98 4.6 51,300 6,840 9,360

1991 . . . . . . . . . . . 3.7 21,811.60 3.7 53,400 7,080 9,720

1992 . . . . . . . . . . . 3.0 22,935.42 5.2 55,500 7,440 10,200

1993 . . . . . . . . . . . 2.6 23,132.67 .9 57,600 7,680 10,560

1994 . . . . . . . . . . . 2.8 23,753.53 2.7 60,600 8,040 11,160

1995 . . . . . . . . . . . 2.6 24,705.66 4.0 61,200 8,160 11,280

1996 . . . . . . . . . . . 2.9 25,913.90 4.9 62,700 8,280 12,500

1997 . . . . . . . . . . . 2.1 27,426.00 5.8 65,400 8,640 13,500

1998 . . . . . . . . . . . 1.3 28,861.44 5.2 68,400 9,120 14,500

1999 . . . . . . . . . . . 62.5 30,469.84 5.6 72,600 9,600 15,500

2000 . . . . . . . . . . . 3.5 32,154.82 5.5 76,200 10,080 17,000

2001 . . . . . . . . . . . 2.6 32,921.92 2.4 80,400 10,680 25,000

2002 . . . . . . . . . . . 1.4 33,252.09 1.0 84,900 11,280 30,000

2003 . . . . . . . . . . . 2.1 34,064.95 2.4 87,000 11,520 30,720

Intermediate:

2004 . . . . . . . . . . . 7 2.7 35,157.10 3.2 787,900 711,640 731,080

2005 . . . . . . . . . . . 2.0 36,599.68 4.1 790,000 712,000 731,800

2006 . . . . . . . . . . . 2.2 38,137.06 4.2 93,000 12,360 32,760

2007 . . . . . . . . . . . 2.7 39,793.49 4.3 96,600 12,840 34,200

2008 . . . . . . . . . . . 2.8 41,463.08 4.2 100,800 13,320 35,640

2009 . . . . . . . . . . . 2.8 43,155.26 4.1 105,000 13,920 37,080

2010 . . . . . . . . . . . 2.8 44,893.85 4.0 109,500 14,520 38,640

2011 . . . . . . . . . . . 2.8 46,702.32 4.0 114,000 15,120 40,320

2012 . . . . . . . . . . . 2.8 48,631.78 4.1 118,500 15,720 41,880

2013 . . . . . . . . . . . 2.8 50,572.35 4.0 123,300 16,320 43,560

2014 . . . . . . . . . . . 2.8 52,532.90 3.9 128,400 17,040 45,360

Low Cost:

2004 . . . . . . . . . . . 72.7 35,134,22 3.1 787,900 711,640 731,080

2005 . . . . . . . . . . . 1.8 36,563.32 4.1 790,000 712,000 731,800

2006 . . . . . . . . . . . 1.8 38,029.05 4.0 92,700 12,360 32,760

2007 . . . . . . . . . . . 1.8 39,563.07 4.0 96,600 12,840 34,080

2008 . . . . . . . . . . . 1.8 41,062.34 3.8 100,500 13,320 35,520

2009 . . . . . . . . . . . 1.8 42,565.55 3.7 104,400 13,920 36,960

2010 . . . . . . . . . . . 1.8 44,101.67 3.6 108,600 14,400 38,280

2011 . . . . . . . . . . . 1.8 45,678.34 3.6 112,500 14,880 39,720

2012 . . . . . . . . . . . 1.8 47,325.89 3.6 116,400 15,480 41,160

2013 . . . . . . . . . . . 1.8 48,954.25 3.4 120,600 15,960 42,600

2014 . . . . . . . . . . . 1.8 50,604.20 3.4 125,100 16,560 44,160
Assumptions & Methods

98

Other wage-indexed amounts are shown in table V.C2. The table provides

historical values from 1978, when the amount of earnings required for a

quarter of coverage was first indexed, through 2005, and also shows projected amounts through 2014. These other wage-indexed program amounts

are:

 • The bend points in the formula for computing the primary insurance

amount (PIA) for workers who reach age 62, become disabled, or die in

a given year. These bend points indicate three ranges in a worker’s average indexed monthly earnings (AIME) over which a certain percent factor, 90, 32, or 15 percent respectively, is applied to determine the

worker’s PIA. Figure V.C1 presents the PIA formula for 2005.

High Cost:

2004 . . . . . . . . . . . 72.7 $35,067.38 2.9 7$87,900 7$11,640 7$31,080

2005 . . . . . . . . . . . 2.6 35,921.47 2.4 790,000 712,000 731,800

2006 . . . . . . . . . . . 2.6 37,716.79 5.0 92,700 12,240 32,760

2007 . . . . . . . . . . . 2.9 39,428.35 4.5 94,800 12,600 33,480

2008 . . . . . . . . . . . 4.6 40,860.58 3.6 99,600 13,200 35,160

2009 . . . . . . . . . . . 5.8 43,485.07 6.4 104,100 13,800 36,840

2010 . . . . . . . . . . . 5.5 46,602.64 7.2 108,000 14,280 38,160

2011 . . . . . . . . . . . 4.6 49,154.43 5.5 114,900 15,240 40,560

2012 . . . . . . . . . . . 3.8 51,426.51 4.6 123,000 16,320 43,440

2013 . . . . . . . . . . . 3.8 53,679.36 4.4 129,900 17,280 45,840

2014 . . . . . . . . . . . 3.8 55,992.55 4.3 135,900 18,000 48,000

1 Effective with benefits payable for June in each year 1975-82, and for December in each year after 1982. 2 See table VI.F6 for projected dollar amounts of the AWI beyond 2014.

3 Amounts for 1979-81 were specified by Public Law 95-216. The bases for years after 1989 were increased

slightly by changes to the indexing procedure, as required by Public Law 101-239. 4 Normal retirement age. See table V.C3 for specific values.

5 In 1955-82, the retirement earnings test did not apply at ages 72 and over; in 1983-99, the test did not apply

at ages 70 and over; beginning in 2000, it does not apply beginning with the month of attainment of NRA. In

the year of attainment of NRA, the higher exempt amount applies to earnings in the year prior to the month

of NRA attainment. Amounts for 1978-82 specified by Public Law 95-216; for 1996-2002, Public Law

104-121.

6 Originally determined as 2.4 percent, but pursuant to Public Law 106-554, is effectively 2.5 percent. 7 Actual amount, as determined under automatic-adjustment provisions.

Table V.C1.—Cost-of-Living Benefit Increases, Average Wage Index, Contribution and 

Benefit Bases, and Retirement Earnings Test Exempt Amounts, 1975-2014 (Cont.)

Calendar year

OASDI

benefit

increases1

(percent)

Average

wage index (AWI) 2 OASDI

contribution

and benefit

base 3

Retirement earnings

test exempt amount

Amount

Increase

(percent)

Under

NRA4 At NRA5
99

Program Assumptions and Methods

 • Bend points in the formula used to compute the maximum total amount

of monthly benefits payable on the basis of the earnings of a retired or

deceased worker. This formula is a function of the worker’s PIA, and

relies on four intervals and percentages. Figure V.C2 presents the maximum-family-benefit formula for 2005.

 Figure V.C1.—Primary-Insurance-Amount Formula for the 2005 Cohort

 Figure V.C2.—Maximum-Family-Benefit Formula for the 2005 Cohort

90%

15%

32%

$0

$500

$1,000

$1,500

$2,000

$2,500

$0 $1,000 $2,000 $3,000 $4,000 $5,000 $6,000

Average Indexed Monthly Earnings

Primary Insurance Amount .

First

bend point

($627)

Second

bend point

($3,779)

272%

150%

175%

134%

$0

$500

$1,000

$1,500

$2,000

$2,500

$3,000

$3,500

$0 $500 $1,000 $1,500 $2,000

Primary Insurance Amount

Maximum family benefit .

Third

bend point

($1,508)

Second

bend point

($1,156)

First

bend point

($801)
Assumptions & Methods

100

 • The amount of earnings required in a year to be credited with a quarter

of coverage (QC). The number and timing of QCs earned is used to

determine an individual’s insured status—the basic requirement for

benefit eligibility under OASDI.

 • The old-law contribution and benefit base—the OASDI contribution

and benefit base that would have been in effect in each year after 1978

under the automatic-adjustment provisions as in effect before the enactment of the 1977 amendments. This old-law base is used in determining

special-minimum benefits for certain workers who have many years of

low earnings in covered employment. Beginning in 1986, the old-law

base is also used in the calculation of OASDI benefits for certain workers who are eligible to receive pensions based on noncovered employment. In addition, it is used for certain purposes under the Railroad

Retirement program and the Employee Retirement Income Security Act

of 1974.

Table V.C2.—Selected Wage-Indexed Program Amounts, 

Calendar Years 1978-2014

Calendar year

AIME bend

points in PIA

formula1

PIA bend points

in maximumfamily-benefit formula2

Earnings

required for

a quarter of

coverage

Old-law

contribution

and benefit

base3 First Second First Second Third

Historical data:

1978 . . . . . . . . . 4/ 4/1 4/1 4/1 4/1 5 $250 4/1

1979 . . . . . . . . . 5 $180 5 $1,085 5 $230 5 $332 5 $433 260 $18,900

1980 . . . . . . . . . 194 1,171 248 358 467 290 20,400

1981 . . . . . . . . . 211 1,274 270 390 508 310 22,200

1982 . . . . . . . . . 230 1,388 294 425 554 340 24,300

1983 . . . . . . . . . 254 1,528 324 468 610 370 26,700

1984 . . . . . . . . . 267 1,612 342 493 643 390 28,200

1985 . . . . . . . . . 280 1,691 358 517 675 410 29,700

1986 . . . . . . . . . 297 1,790 379 548 714 440 31,500

1987 . . . . . . . . . 310 1,866 396 571 745 460 32,700

1988 . . . . . . . . . 319 1,922 407 588 767 470 33,600

1989 . . . . . . . . . 339 2,044 433 626 816 500 35,700

1990 . . . . . . . . . 356 2,145 455 656 856 520 38,100

1991 . . . . . . . . . 370 2,230 473 682 890 540 39,600

1992 . . . . . . . . . 387 2,333 495 714 931 570 41,400

1993 . . . . . . . . . 401 2,420 513 740 966 590 42,900

1994 . . . . . . . . . 422 2,545 539 779 1,016 620 45,000

1995 . . . . . . . . . 426 2,567 544 785 1,024 630 45,300

1996 . . . . . . . . . 437 2,635 559 806 1,052 640 46,500

1997 . . . . . . . . . 455 2,741 581 839 1,094 670 48,600

1998 . . . . . . . . . 477 2,875 609 880 1,147 700 50,700

1999 . . . . . . . . . 505 3,043 645 931 1,214 740 53,700

2000 . . . . . . . . . 531 3,202 679 980 1,278 780 56,700

2001 . . . . . . . . . 561 3,381 717 1,034 1,349 830 59,700

2002 . . . . . . . . . 592 3,567 756 1,092 1,424 870 63,000

2003 . . . . . . . . . 606 3,653 774 1,118 1,458 890 64,500

2004 . . . . . . . . . 612 3,689 782 1,129 1,472 900 65,100

2005 . . . . . . . . . 627 3,779 801 1,156 1,508 920 66,900
101

Program Assumptions and Methods

Intermediate:

2006 . . . . . . . . . $647 $3,901 $827 $1,194 $1,557 $950 $69,000

2007 . . . . . . . . . 674 4,061 861 1,243 1,621 990 71,700

2008 . . . . . . . . . 702 4,231 897 1,295 1,689 1,030 74,700

2009 . . . . . . . . . 732 4,415 936 1,351 1,762 1,080 78,000

2010 . . . . . . . . . 763 4,600 975 1,408 1,836 1,120 81,300

2011 . . . . . . . . . 794 4,788 1,015 1,465 1,911 1,170 84,600

2012 . . . . . . . . . 826 4,981 1,056 1,524 1,988 1,220 88,200

2013 . . . . . . . . . 860 5,181 1,098 1,585 2,068 1,270 91,500

2014 . . . . . . . . . 895 5,396 1,144 1,651 2,153 1,320 95,400

Low Cost:

2006 . . . . . . . . . 647 3,898 826 1,193 1,556 950 69,000

2007 . . . . . . . . . 673 4,057 860 1,241 1,619 990 71,700

2008 . . . . . . . . . 700 4,219 894 1,291 1,684 1,030 74,700

2009 . . . . . . . . . 728 4,389 930 1,343 1,752 1,070 77,700

2010 . . . . . . . . . 756 4,556 966 1,394 1,818 1,110 80,700

2011 . . . . . . . . . 783 4,723 1,001 1,445 1,885 1,150 83,400

2012 . . . . . . . . . 812 4,893 1,037 1,497 1,953 1,190 86,400

2013 . . . . . . . . . 841 5,068 1,074 1,551 2,022 1,240 89,700

2014 . . . . . . . . . 871 5,251 1,113 1,607 2,095 1,280 93,000

High Cost:

2006 . . . . . . . . . 645 3,891 825 1,190 1,553 950 68,700

2007 . . . . . . . . . 661 3,985 845 1,219 1,590 970 70,500

2008 . . . . . . . . . 694 4,185 887 1,280 1,670 1,020 74,100

2009 . . . . . . . . . 726 4,374 927 1,339 1,746 1,070 77,400

2010 . . . . . . . . . 752 4,533 961 1,387 1,809 1,110 80,100

2011 . . . . . . . . . 800 4,825 1,023 1,476 1,925 1,180 85,200

2012 . . . . . . . . . 858 5,170 1,096 1,582 2,063 1,260 91,500

2013 . . . . . . . . . 905 5,454 1,156 1,669 2,176 1,330 96,300

2014 . . . . . . . . . 947 5,706 1,209 1,746 2,277 1,390 100,800

1 The formula to compute a PIA is (1) 90% of AIME below the first bend point, plus (2) 32% of AIME in

excess of the first bend point but not in excess of the second, plus (3) 15% of AIME in excess of the second

bend point. The bend points pertain to the first year a beneficiary becomes eligible for benefits. 2 The formula to compute a family maximum is (1) 150% of PIA below the first bend point, plus (2) 272% of

PIA in excess of the first bend point but not in excess of the second, plus (3) 134% of PIA in excess of the

second bend point but not in excess of the third, plus (4) 175% of PIA in excess of the third bend point. 3 Contribution and benefit base that would have been determined automatically under the law in effect prior

to enactment of the Social Security Amendments of 1977. The bases for years after 1989 were increased

slightly by changes to the indexing procedure to determine the base, as required by Public Law 101-239. 4 No provision in law for this amount in this year.

5 Amount specified for first year by Social Security Amendments of 1977; amounts for subsequent years

subject to automatic-adjustment provisions.

Table V.C2.—Selected Wage-Indexed Program Amounts, 

Calendar Years 1978-2014 (Cont.)

Calendar year

AIME bend

points in PIA

formula1

PIA bend points

in maximumfamily-benefit formula2

Earnings

required for

a quarter of

coverage

Old-law

contribution

and benefit

base3 First Second First Second Third
Assumptions & Methods

102

In addition to the program amounts affecting the determination of OASDI

benefits that reflect changes in the economy, there are certain legislated

changes that have affected, and will affect, benefits. Two such changes are

the scheduled increases in the normal retirement age and in the delayed

retirement credits. Table V.C3 shows the scheduled changes in these two

important items and their effect on benefits expressed as a percentage of PIA.

2. Covered Employment

Projections of the total labor force and unemployment rate are based on

Bureau of Labor Statistics definitions from the Current Population Survey

(CPS), and thus represent the average weekly number of employed and

unemployed persons, aged 16 and over, in the U.S. in a calendar year. Total

covered workers in a year are the number of persons who have any OASDI

covered earnings at any time during the year. For those aged 16 and over,

projected covered employment is the sum of age-sex components, each of

Table V.C3.—Legislated Changes in Normal Retirement Age and Delayed Retirement

Credits, for Persons Reaching Age 62 in Each Year 1986 and Later

Year of birth

Year of

attainment of

age 62

Normal

retirement

age (NRA)

Credit for each 

year of delayed 

retirement after

NRA (percent)

Benefit, as a percentage of PIA, 

beginning at age —

62 65 66 67 70

1924 . . . . . . . . 1986. . . . . . . . 65 . . . . . . . . 3 80 100 103 106 115

1925 . . . . . . . . 1987. . . . . . . . 65 . . . . . . . . 3 1/2 80 100 103 1/2 107 117 1/2

1926 . . . . . . . . 1988. . . . . . . . 65 . . . . . . . . 3 1/2 80 100 103 1/2 107 117 1/2

1927 . . . . . . . . 1989. . . . . . . . 65 . . . . . . . . 4 80 100 104 108 120

1928 . . . . . . . . 1990. . . . . . . . 65 . . . . . . . . 4 80 100 104 108 120

1929 . . . . . . . . 1991. . . . . . . . 65 . . . . . . . . 4 1/2 80 100 104 1/2 109 122 1/2

1930 . . . . . . . . 1992. . . . . . . . 65 . . . . . . . . 4 1/2 80 100 104 1/2 109 122 1/2

1931 . . . . . . . . 1993. . . . . . . . 65 . . . . . . . . 5 80 100 105 110 125

1932 . . . . . . . . 1994. . . . . . . . 65 . . . . . . . . 5 80 100 105 110 125

1933 . . . . . . . . 1995. . . . . . . . 65 . . . . . . . . 5 1/2 80 100 105 1/2 111 127 1/2

1934 . . . . . . . . 1996. . . . . . . . 65 . . . . . . . . 5 1/2 80 100 105 1/2 111 127 1/2

1935 . . . . . . . . 1997. . . . . . . . 65 . . . . . . . . 6 80 100 106 112 130

1936 . . . . . . . . 1998. . . . . . . . 65 . . . . . . . . 6 80 100 106 112 130

1937 . . . . . . . . 1999. . . . . . . . 65 . . . . . . . . 6 1/2 80 100 106 1/2 113 132 1/2

1938 . . . . . . . . 2000. . . . . . . . 65, 2 mo . . . 6 1/2 79 1/6 98 8/9 105 5/12 111 11/12 131 5/12

1939 . . . . . . . . 2001. . . . . . . . 65, 4 mo . . . 7 78 1/3 97 7/9 104 2/3 111 2/3 132 2/3

1940 . . . . . . . . 2002. . . . . . . . 65, 6 mo . . . 7 77 1/2 96 2/3 103 1/2 110 1/2 131 1/2

1941 . . . . . . . . 2003. . . . . . . . 65, 8 mo . . . 7 1/2 76 2/3 95 5/9 102 1/2 110 132 1/2

1942 . . . . . . . . 2004. . . . . . . . 65, 10 mo . . 7 1/2 75 5/6 94 4/9 101 1/4 108 3/4 131 1/4

1943-54 . . . . . 2005-16 . . . . . 66 . . . . . . . . 8 75 93 1/3 100 108 132

1955 . . . . . . . . 2017. . . . . . . . 66, 2 mo . . . 8 74 1/6 92 2/9 98 8/9 106 2/3 130 2/3

1956 . . . . . . . . 2018. . . . . . . . 66, 4 mo . . . 8 73 1/3 91 1/9 97 7/9 105 1/3 129 1/3

1957 . . . . . . . . 2019. . . . . . . . 66, 6 mo . . . 8 72 1/2 90 96 2/3 104 128

1958 . . . . . . . . 2020. . . . . . . . 66, 8 mo . . . 8 71 2/3 88 8/9 95 5/9 102 2/3 126 2/3

1959 . . . . . . . . 2021. . . . . . . . 66, 10 mo . . 8 70 5/6 87 7/9 94 4/9 101 1/3 125 1/3

1960 & later . . 2022 & later . 67 . . . . . . . . 8 70 86 2/3 93 1/3 100 124
103

Program Assumptions and Methods

which is projected as a ratio to the CPS concept of employment. For those

under age 16, projected covered employment is the sum of age-sex components, each of which is projected as a ratio to the Social Security area population. The projection methodology accounts for changes in the business cycle,

the quarterly pattern of growth in employment within each year, changes in

non-OASDI covered employment, the increase in coverage of Federal civilian employment as a result of the 1983 Social Security Amendments, and

changes in the number of other immigrants estimated to be residing within

the Social Security coverage area.

Covered worker rates are defined as the ratio of OASDI covered workers to

the Social Security area population. The projected age-adjusted coverage rate

for males age 16 and over, changes from its 2004 level of about 72.5 percent

to 72.7, 72.6, and 72.7 percent for 2080 for the low cost, intermediate, and

high cost assumptions, respectively. (Age-adjusted covered worker rates are

adjusted to the 2003 age distribution of the Social Security area population.)

For females, the projected age-adjusted coverage rate changes from its 2004

level of 61.7 percent to 63.7, 63.3, and 63.0 percent for 2080 for the low

cost, intermediate, and high cost assumptions, respectively.

3. Taxable Payroll and Payroll Tax Revenue

The OASDI taxable payroll is the amount of earnings in a year which, when

multiplied by the combined employee-employer tax rate, yields the total

amount of taxes due from wages and self-employed income in the year. Taxable payroll is used in estimating OASDI income and in determining income

and cost rates and actuarial balances. (See section IV.B.1, Annual Income

Rates, Cost Rates, and Balances, for definitions of these terms.) Taxable payroll is computed from taxable earnings, defined as the sum of wages and selfemployment earnings subject to the Social Security tax. Wages are adjusted

to take into account the “excess wages” earned by workers with multiple jobs

whose combined wages exceed the taxable earnings base. Also, from 1983

through 2001, taxable payroll includes deemed wage credits for military service. Prior to 1984, the self-employed tax rate was less than the combined

employee-employer rate, thus taxable self-employed earnings were weighted

to reflect this. Also, prior to 1988, employers were exempt from Social Security tax on part of their employees’ tips; taxable payroll was reduced by half

of this exempt amount to take this into account.

Taxable earnings for employees, employers, and the self-employed are estimated from total earnings in covered employment. Covered earnings are

summed from component sectors, each of which is based on the projected

growth of U.S. earnings and a factor that reflects any projected change in
Assumptions & Methods

104

coverage (e.g., the increase in coverage in the Federal civilian sector due to

mandatory coverage of newly hired employees). The level of taxable earnings, that is, covered earnings at or below the contribution and benefit base,

is then estimated based on recent historical earnings distributions for wage

and self-employed workers. The ratio of taxable to covered earnings was

about 90.2, 87.4, and 83.3 percent for 1983, 1994, and 2000, respectively.

The ratio then rose to about 84.8 in 2001 and 86.3 in 2002. Our preliminary

estimate for 2004 is 84.9 percent, about the same as in 2001. The average

annual rate of change in the ratio was about -0.3 percent between 1983 and

1994, and -0.8 percent between 1994 and 2000. The relatively faster decline

between 1994 and 2000 was mainly due to a relative increase in wages for

high wage earners. At least some of this decline and subsequent increase in

the ratio is believed to be due to stock option activity surrounding the stock

market bubble in 2000 and is not likely to recur.

However, some of the decline since 1983 is believed to be due to the change

in the age-sex distribution of the workforce and other trend-like factors that

are expected to continue through 2014 in all three alternatives. The projected

taxable earnings ratios in 2014 are 84.2, 83.3, and 82.6 for the low cost,

intermediate, and high cost assumptions, respectively. This represents average annual rates of change from 2004 of -0.1, -0.2, and -0.3 percent. After

2014, the taxable to covered ratio is held approximately constant.

Payroll tax revenue is computed by applying the appropriate tax rates to taxable wages and self-employment income, taking into account the lag

between the time the tax liability is incurred and when the taxes are collected. In the case of wages, employers are required to deposit withholding

taxes with the Treasury on a schedule determined by the amount of tax liability incurred. (Generally, the higher the amount of liability, the sooner the

taxes must be paid—ranging from the middle of the following month to, for

companies with very large payrolls, the next banking day after wages are

paid.) Self-employed workers are required to make estimated tax payments

on their earnings four times during the year, as well as making up any underestimate on their individual income tax return. The pattern of actual receipts

by the Treasury is taken into account when estimating self-employed tax collections.

4. Insured Population

Eligibility for benefits under the OASDI program requires some minimal

level of work in covered employment. This requirement is established by a

worker’s accumulation of quarters of coverage (QCs). Prior to 1978, one QC

was credited for each calendar quarter in which at least $50 was earned. In
105

Program Assumptions and Methods

1978, when quarterly reporting of earnings was replaced by annual reporting,

the amount required to earn a QC (up to a maximum of four per year) was set

at $250. Since then, this amount has been adjusted each year according to

changes in the AWI. Its value in 2005 is $920.

There are three types of insured status which can be acquired by a worker

under the OASDI program. Each of these statuses is determined by the number and recency of QCs earned. Fully insured status is acquired by any

worker whose total number of QCs is greater than or equal to the number of

years elapsed after the year of attainment of age 21 (and at least six). Once a

worker has accumulated 40 QCs, he or she remains permanently fully

insured. Disability-insured status is acquired by any fully insured worker

over age 30 who has accumulated 20 QCs during the 40-quarter period ending with the current quarter; any fully insured worker aged 24-30 who has

accumulated QCs during one-half of the quarters elapsed after the quarter of

attainment of age 21 and up to and including the current quarter; and any

fully insured worker under age 24 who has accumulated six QCs during the

12-quarter period ending with the current quarter. Currently insured status is

acquired by any worker who has accumulated six QCs during the 13-quarter

period ending with the current quarter. Periods of disability are excluded

from the above described QC requirements for insured status (but do not

reduce the minimum of six QCs).

There are many types of benefits payable to workers and their family members under the OASDI program. One of the requirements of eligibility for

these benefits is the insured status of the worker. A worker must be fully

insured to be eligible for a primary retirement benefit, and for his or her

spouse or children to be eligible for auxiliary benefits. A deceased worker

must have been either currently insured or fully insured at the time of death

for his or her children (and their mother or father) to be eligible for benefits.

If there are no eligible surviving children, the deceased worker must have

been fully insured at the time of death for his or her surviving spouse to be

eligible. A worker must be disability insured to be eligible for a primary disability benefit, and for his or her spouse or children to be eligible for auxiliary benefits.

Projections of the fully insured population, as a percentage of the Social

Security area population, are made by age and sex for each birth cohort

beginning with 1900. These percentages are based on 30,000 simulated work

histories for each sex and birth cohort, which are constructed from past and

projected coverage rates, median earnings, and amounts required for crediting QCs. These work histories are developed by a model which assumes that

persons who have recently been out of covered employment are likely to
Assumptions & Methods

106

remain out of covered employment. This model is driven by two sets of agesex-specific parameters which are empirically set such that the simulated

fully insured percentages reproduce fairly closely the fully insured percentages estimated from the Continuous Work History Sample from 1970 to date.

Projections of the disability-insured population, as a percentage of the fully

insured population, are made by age and sex for each birth cohort beginning

with 1900. These percentages are based on the same simulated work histories

used to project the fully insured percentages. Additional adjustments are

made to bring the simulated disability-insured percentages into close agreement with those estimated from the Continuous Work History Sample. The

principal adjustment is for periods of disability (which are not explicitly

taken into account in the model). These periods (which reduce the normally

applicable QC requirements) have a negligible effect on fully insured status

at retirement age, but a substantial effect on disability-insured status.

Projections of the currently insured population are not made. This is because

the number of beneficiaries who are entitled to benefits based solely on currently insured status has been very small, and is expected to remain small in

the future.

Under this procedure, the percentage of the Social Security area population

aged 62 and over that is fully insured is projected to increase from its estimated level of 80.3 for December 31, 2002, to 89.3, 90.2, and 90.9 for

December 31, 2080, under alternatives I, II, and III, respectively. The percentage for females is projected to increase significantly, while that for males

is projected to remain relatively unchanged. Under alternative II, for example, the percentage for males is projected to decrease slightly during this

period from 92.9 to 92.0, while that for females is projected to increase from

70.9 to 88.6.

5. Old-Age and Survivors Insurance Beneficiaries

The number of OASI beneficiaries is projected for each type of benefit separately, by the sex of the worker on whose earnings the benefits are based, and

by the age of the beneficiary. For selected types of benefits, the number of

beneficiaries is also projected by marital status.

For the short-range period, the number of retired-worker beneficiaries is

developed by applying award rates to the aged fully insured population less

those insured persons entitled to retired-worker, disabled-worker, aged

widow(er)’s, or aged spouse’s benefits, and by applying termination rates to

the number of persons already receiving retired-worker benefits.
107

Program Assumptions and Methods

For the long-range period, the number of retired-worker beneficiaries not

previously converted from disabled-worker beneficiary status is projected as

a percentage of the exposed population, i.e., the aged fully insured population less persons entitled to or converted from disability benefits and insured

persons entitled to widow(er)’s benefits. For age 62, a linear regression is

developed based on the relationship between the historical exposed percentage and the labor force participation rate. The regression coefficients are then

used to project the percentage based on the projected labor force participation rate for age 62. The percentage for ages 70 and over is assumed to be

nearly 100, because the retirement earnings test and delayed retirement credit

do not apply after age 70, but is adjusted for the statistical difference

between in-force data and in-current-payment data. The percentage for each

age 63 through 69 is projected from the December 31, 2004 retired-worker

beneficiaries data which reflects the elimination of the earnings test after

normal retirement age, with an adjustment for changes in the portion of the

primary insurance amount that is payable at each age of entitlement. As the

normal retirement age increases, the number of retired-worker beneficiaries

not automatically converted from disabled-worker beneficiary status as a

percentage of the exposed population is gradually adjusted downward at

each age 63 through 69.

For the long-range period also, the number of retired-worker beneficiaries

previously converted from disabled-worker beneficiaries is calculated separately in a manner consistent with the calculation of disabled-worker beneficiaries.

The number of aged-spouse beneficiaries is estimated from the population

projected by age and sex. The benefits of aged-spouse beneficiaries are based

on the earnings records of their husbands or wives, who are referred to as

“wage earners.” In the short-range period, insured aged-spouse beneficiaries

are projected concurrently with the retired-worker beneficiaries. Uninsured

aged-spouse beneficiaries are projected, on the other hand, by applying

award rates to the aged uninsured male or female population, and by applying termination rates to the population already receiving such benefits. In the

long-range period, aged-spouse beneficiaries are estimated from the population projected by age, sex, and marital status. To the number of spouses aged

62 and over in the population, a series of factors are applied, representing the

probabilities that the spouse and the wage earner meet all of the conditions of

eligibility—i.e., the probabilities that (1) the wage earner is 62 or over, (2)

the wage earner is insured, (3) the wage earner is receiving benefits, (4) the

spouse is not receiving a benefit for the care of an entitled child, (5) the

spouse is not insured, and (6) the spouse is not eligible to receive a signifi-
Assumptions & Methods

108

cant government pension based on earnings in noncovered employment. To

the resulting number of spouses a projected prevalence rate is applied to calculate the estimated number of aged-spouse beneficiaries.

In addition, the same factors are applied to the number of divorced persons

aged 62 and over in the population, with three differences. First, an additional factor is required to reflect the probability that the person’s former

wage-earner spouse is still alive (otherwise, the person may be entitled to a

divorced widow(er)’s benefit). Second, a factor is required to reflect the

probability that the marriage to the wage-earner spouse was at least 10 years

in duration. Third, factor (3) above is not applied because, effective for January 1985, a divorced person generally need not wait to receive benefits until

the former wage-earner spouse is receiving benefits.

The projected numbers of children under age 18, and students aged 18, who

are eligible for benefits as children of retired-worker beneficiaries, are based

on the projected number of children in the population. In the short-range

period, the number of entitled children is developed by applying award rates

to the number of children in the population where both parents are alive, and

by applying termination rates to the number of children already receiving

benefits.

In the long-range period, the number of entitled children is projected separately by sex of the wage-earner parent. To the number of children in the

population, factors are applied representing the probabilities that the parent is

alive, aged 62 or over, insured, and receiving a retired-worker benefit.

Another factor is applied representing the probability that the child is not

entitled to a benefit based on the other parent’s earnings. For children aged

18, a factor representing the probability that the child is attending a secondary school is also applied.

The number of disabled children aged 18 and over of retired-worker beneficiaries is projected from the adult population. In the short-range period,

award rates are applied to the population, and termination rates are applied to

the number of disabled children already receiving benefits. In the long-range

period, disabled children are projected in a manner similar to that for children under 18, with the inclusion of a factor representing the probability of

being disabled since childhood.

In the short-range period, the number of entitled young-spouse beneficiaries

is developed by applying award rates to the number of awards to children of

retired workers, where the children are either under age 16 or disabled, and

by applying termination rates to the number of young spouses already receiving benefits. In the long-range period, young-spouse beneficiaries are pro-
109

Program Assumptions and Methods

jected as a proportion of the projected number of child beneficiaries of

retired workers, taking into account projected changes in average family

size.

The number of aged-widow(er) beneficiaries is projected from the population by age and sex. In the short-range period, insured aged-widow(er) beneficiaries are projected concurrently with the retired-worker beneficiaries.

Uninsured aged-widow(er) beneficiaries are projected, on the other hand, by

applying award rates to the aged uninsured male or female population, and

by applying termination rates to the population already receiving such benefits. In the long-range period, aged-widow(er) beneficiaries are projected

from the population by age, sex, and marital status. Four factors are applied

to the number of widow(er)s in the population aged 60 and over. These factors represent the probabilities that (1) the deceased wage earner is fully

insured at death, (2) the widow(er) is not receiving a benefit for the care of

an entitled child, (3) the widow(er) is not fully insured, and (4) the

widow(er)’s benefits are not withheld because of receipt of a significant government pension based on earnings in noncovered employment. In addition,

some insured widow(er)s who had not applied for their retired-worker benefits are assumed to receive widow(er)’s benefits. Also, the same factors are

applied to the number of divorced persons aged 60 and over in the population, with additional factors representing the probability that the person’s

former wage-earner spouse is deceased and that the marriage was at least 10

years in duration.

In the short-range period, the number of disabled-widow(er) beneficiaries is

developed by applying award rates to the uninsured male or female population, and by applying termination rates to the population already receiving a

disabled-widow(er) benefit. In the long-range period, the number is projected

for each age 50 up to NRA as a percentage of the widowed and divorced

populations, adjusted for the insured status of the deceased spouse and the

prevalence of disability.

The projected numbers of children under age 18, and students aged 18, who

are eligible for benefits as survivors of deceased workers, are based on the

projected number of children in the population whose mothers or fathers are

deceased. In the short-range period, the number of entitled children is developed by applying award rates to the number of orphaned children, and by

applying termination rates to the number of children already receiving benefits.

In the long-range period, the number of child-survivor beneficiaries is projected in a manner analogous to that for child beneficiaries of retired work-
Assumptions & Methods

110

ers, with the factor representing the probability that the parent is aged 62 or

over replaced by a factor that represents the probability that the parent is

deceased.

In the short-range period, the numbers of entitled mother-survivor and fathersurvivor beneficiaries are developed by applying award rates to the number

of awards to child-survivor beneficiaries, where the children are either under

age 16 or disabled, and by applying termination rates to the number of

mother-survivors and father-survivors already receiving benefits. In the longrange period, mother-survivor and father-survivor beneficiaries are estimated

from the number of child-survivor beneficiaries, taking into account projected changes in average family size.

The number of parent-survivor beneficiaries is projected based on the historical pattern of the number of such beneficiaries.

Table V.C4 shows the projected number of beneficiaries under the OASI program by type of benefit. Included among the beneficiaries who receive

retired-worker benefits are some persons who also receive a residual benefit

consisting of the excess of an auxiliary benefit over their retired-worker benefit. Estimates of the number of such residual payments are made separately

for spouses and widow(er)s.
111

Program Assumptions and Methods

Table V.C4.—OASI Beneficiaries With Benefits in Current-Payment Status 

at the End of Calendar Years 1945-2080

[In thousands]

Calendar year

Retired workers and auxiliaries Survivors

Worker Spouse Child Total

WidowwidowerMotherfather Child Parent

Historical data:

1945 . . . . . . . . . . 518 159 13 94 121 377 6 1,288

1950 . . . . . . . . . . 1,771 508 46 314 169 653 15 3,477

1955 . . . . . . . . . . 4,474 1,192 122 701 292 1,154 25 7,961

1960 . . . . . . . . . . 8,061 2,269 268 1,544 401 1,577 36 14,157

1965 . . . . . . . . . . 11,101 2,614 461 2,371 472 2,074 35 19,128

1970 . . . . . . . . . . 13,349 2,668 546 3,227 523 2,688 29 23,030

1975 . . . . . . . . . . 16,589 2,867 643 3,888 582 2,919 21 27,509

1980 . . . . . . . . . . 19,564 3,018 639 4,415 563 2,610 15 30,823

1985 . . . . . . . . . . 22,435 3,069 456 4,863 372 1,918 10 33,123

1986 . . . . . . . . . . 22,985 3,088 450 4,931 350 1,878 9 33,691

1987 . . . . . . . . . . 23,444 3,090 439 4,984 329 1,837 8 34,130

1988 . . . . . . . . . . 23,862 3,086 432 5,028 318 1,809 7 34,542

1989 . . . . . . . . . . 24,331 3,093 422 5,071 312 1,782 6 35,017

1990 . . . . . . . . . . 24,841 3,101 421 5,111 304 1,777 6 35,562

1991 . . . . . . . . . . 25,293 3,104 425 5,158 301 1,792 5 36,078

1992 . . . . . . . . . . 25,762 3,112 431 5,205 294 1,808 5 36,618

1993 . . . . . . . . . . 26,109 3,094 436 5,224 289 1,837 5 36,994

1994 . . . . . . . . . . 26,412 3,066 440 5,232 283 1,865 4 37,303

1995 . . . . . . . . . . 26,679 3,026 441 5,225 275 1,884 4 37,534

1996 . . . . . . . . . . 26,905 2,970 442 5,211 242 1,898 4 37,672

1997 . . . . . . . . . . 27,282 2,922 441 5,053 230 1,893 3 37,825

1998 . . . . . . . . . . 27,518 2,864 439 4,990 221 1,884 3 37,918

1999 . . . . . . . . . . 27,784 2,811 442 4,944 212 1,885 3 38,081

2000 . . . . . . . . . . 28,505 2,798 459 4,901 203 1,878 3 38,748

2001 . . . . . . . . . . 28,843 2,742 467 4,828 197 1,890 3 38,969

2002 . . . . . . . . . . 29,195 2,681 477 4,770 194 1,908 2 39,226

2003 . . . . . . . . . . 29,537 2,622 480 4,705 190 1,910 2 39,446

2004 . . . . . . . . . . 29,952 2,569 482 4,642 184 1,901 2 39,733

Intermediate:

2005 . . . . . . . . . . 30,401 2,538 487 4,571 180 1,906 2 40,085

2010 . . . . . . . . . . 34,374 2,482 491 4,402 166 1,869 1 43,785

2015 . . . . . . . . . . 40,741 2,491 521 4,331 159 1,869 2 50,114

2020 . . . . . . . . . . 48,435 2,530 599 4,303 153 1,854 2 57,876

2025 . . . . . . . . . . 55,516 2,641 699 4,385 155 1,858 2 65,254

2030 . . . . . . . . . . 61,958 2,588 789 4,448 154 1,860 2 71,798

2035 . . . . . . . . . . 66,247 2,520 838 4,484 151 1,853 2 76,095

2040 . . . . . . . . . . 68,443 2,490 861 4,494 147 1,830 2 78,266

2045 . . . . . . . . . . 70,009 2,520 878 4,493 142 1,800 2 79,845

2050 . . . . . . . . . . 71,701 2,592 889 4,470 138 1,768 2 81,560

2055 . . . . . . . . . . 73,759 2,711 905 4,452 133 1,734 2 83,695

2060 . . . . . . . . . . 76,150 2,798 915 4,446 129 1,701 2 86,141

2065 . . . . . . . . . . 78,605 2,879 934 4,487 126 1,671 2 88,703

2070 . . . . . . . . . . 80,991 2,925 948 4,546 122 1,642 2 91,175

2075 . . . . . . . . . . 83,030 2,978 959 4,614 118 1,615 2 93,316

2080 . . . . . . . . . . 85,100 3,031 973 4,655 114 1,590 2 95,464
Assumptions & Methods

112

Notes: 

1. The number of beneficiaries does not include uninsured individuals who receive benefits under Section

228 of the Social Security Act. Costs are reimbursed from the General Fund of the Treasury for most of

these individuals.

2. Totals do not necessarily equal the sums of rounded components.

6. Disability Insurance Beneficiaries

Benefits are paid from the DI Trust Fund to individuals who satisfy the disability-insured requirements, who are unable to engage in substantial gainful

activity due to medically determinable physical or mental impairment severe

enough to satisfy the requirements of the program, and who have not yet

attained normal retirement age. Spouses and children of such disabled workers may also receive DI benefits provided they satisfy certain criteria, mostly

depending upon age or the age of a child in the care of the non-disabled

Low Cost:

2005 . . . . . . . . . . 30,395 2,538 487 4,570 180 1,907 2 40,079

2010 . . . . . . . . . . 34,299 2,483 494 4,391 168 1,887 1 43,723

2015 . . . . . . . . . . 40,403 2,461 525 4,339 157 1,945 2 49,832

2020 . . . . . . . . . . 47,620 2,512 607 4,342 150 1,994 2 57,226

2025 . . . . . . . . . . 54,135 2,606 716 4,463 149 2,075 2 64,147

2030 . . . . . . . . . . 59,858 2,524 820 4,562 146 2,155 2 70,067

2035 . . . . . . . . . . 63,392 2,416 888 4,607 143 2,225 2 73,672

2040 . . . . . . . . . . 64,884 2,348 931 4,597 141 2,272 2 75,174

2045 . . . . . . . . . . 65,986 2,346 971 4,555 140 2,301 2 76,301

2050 . . . . . . . . . . 67,392 2,396 1,004 4,483 139 2,321 2 77,737

2055 . . . . . . . . . . 69,339 2,480 1,046 4,417 140 2,344 2 79,768

2060 . . . . . . . . . . 71,611 2,532 1,084 4,372 141 2,373 2 82,115

2065 . . . . . . . . . . 73,885 2,564 1,127 4,379 143 2,407 2 84,506

2070 . . . . . . . . . . 76,097 2,574 1,165 4,409 145 2,438 2 86,830

2075 . . . . . . . . . . 78,274 2,607 1,204 4,458 146 2,470 2 89,160

2080 . . . . . . . . . . 80,912 2,661 1,247 4,506 147 2,502 2 91,976

High Cost:

2005 . . . . . . . . . . 30,408 2,538 487 4,571 180 1,906 2 40,092

2010 . . . . . . . . . . 34,442 2,481 489 4,413 164 1,852 1 43,842

2015 . . . . . . . . . . 41,143 2,535 519 4,329 160 1,789 2 50,478

2020 . . . . . . . . . . 49,359 2,603 593 4,265 152 1,708 2 58,681

2025 . . . . . . . . . . 57,114 2,769 686 4,297 150 1,635 2 66,652

2030 . . . . . . . . . . 64,500 2,771 766 4,315 145 1,567 2 74,065

2035 . . . . . . . . . . 69,841 2,759 800 4,336 137 1,498 2 79,371

2040 . . . . . . . . . . 73,079 2,786 803 4,363 127 1,424 2 82,584

2045 . . . . . . . . . . 75,510 2,866 801 4,399 117 1,354 2 85,048

2050 . . . . . . . . . . 77,926 2,970 792 4,415 107 1,293 2 87,504

2055 . . . . . . . . . . 80,540 3,118 785 4,426 98 1,229 2 90,198

2060 . . . . . . . . . . 83,500 3,219 773 4,427 90 1,167 2 93,177

2065 . . . . . . . . . . 86,559 3,328 773 4,463 83 1,111 2 96,317

2070 . . . . . . . . . . 89,532 3,385 768 4,505 75 1,061 2 99,327

2075 . . . . . . . . . . 91,832 3,447 761 4,558 69 1,014 2 101,682

2080 . . . . . . . . . . 93,707 3,516 754 4,563 63 972 2 103,576

Table V.C4.—OASI Beneficiaries With Benefits in Current-Payment Status 

at the End of Calendar Years 1945-2080 (Cont.)

[In thousands]

Calendar year

Retired workers and auxiliaries Survivors

Worker Spouse Child Total

WidowwidowerMotherfather Child Parent
113

Program Assumptions and Methods

spouse. In projecting future benefit outlays from the DI Trust Fund, the number of DI beneficiaries is projected for each type of beneficiary separately, by

the sex of the disabled worker on whose earnings the benefits are based, and

the age of the beneficiary. Such projections are accomplished using standard

actuarial methods reflecting future additions to the DI rolls through awards

of new benefits, and subtractions from the rolls due to death, recovery, or

administrative conversion upon attainment of normal retirement age from

status as a disabled-worker beneficiary to status as a retired-worker beneficiary. The long-range and short-range models used to make these projections

are both constructed from this basic outline, but differ in some details reflecting their respective uses.

The number of new entitlements to disabled-worker benefits during each

year is projected by applying assumed age-sex-specific disability incidence

rates to the projected disability-exposed population.1 Long-range ultimate

disability incidence rates are selected based on careful analysis of historical

patterns and expected future conditions, including the impact of scheduled

increases in the normal retirement age.2 Incidence rates for the first half of

the short-range period reflect the most recent actual experience along with

consideration of other factors expected to affect the processing of disability

claims in the near term. Over the latter half of the short-range period, incidence rates are assumed to trend into levels consistent with the long-range

ultimate incidence rate assumptions.

These assumed incidence rates are summarized in figure V.C3 and table

V.C5. As illustrated in figure V.C3, incidence rates have varied within a wide

range over the past 30 years. Although not completely understood, this variation is attributed in large part to a variety of demographic and economic factors, along with the effects of changes due to legislation and program

administration.3 The solid lines in figure V.C3 illustrate values of the summarized incidence rate, age-sex adjusted to the distribution of the disabilityexposed population for 2000. Such adjustment facilitates meaningful comparisons over long periods of time. From a historically high level of about

7.2 awards per thousand insured in 1975, age-sex-adjusted rates declined to

 1 The disability-exposed population is the disability-insured population that is not currently entitled for disabled-worker benefits.

 2 Incidence rates are adjusted upward to account for the additional workers who are expected to file for disability benefits rather than for reduced retirement benefits that are even more reduced when the NRA is

greater than age 65.

 3 A more detailed discussion of the recent history of the DI program is presented in Actuarial Study 114,

“Social Security Disability Insurance Program Worker Experience”, June 1999. This study can be found on

the Internet at www.socialsecurity.gov/OACT/NOTES/AS114/as114Foreword.html.
Assumptions & Methods

114

about 3.7 per thousand by 1982. Following a gradual trend upward, rates

increased to about 5.8 per thousand by 1992, but declined from that point to

about 4.7 per thousand in 2000. As described in chapter IV, in the discussion

of the short-range DI estimates, the incidence rate experience for 2001-04,

and the projections for 2005-10, are affected by a one-time special workload.

In addition to historical values, figure V.C3 displays the age-sex-adjusted

short-range incidence rates under the three alternative sets of assumptions.

Gross (unadjusted) incidence rates are also shown in figure V.C3 in dashed

lines. These unadjusted rates are heavily influenced by the changing age-sex

distribution of the exposed population over time. This is especially noticeable in the period after 2000 when the aging baby-boom generation will be

concentrated in the ages of highest disability incidence.

Table V.C5 presents the long-range ultimate incidence rate assumptions agesex adjusted to the disability-exposed population as of January 1, 2000. The

table also indicates the year in which the ultimate values are attained, along

with an indication of the relationship between those ultimate rates and the

rates for the base period (1994-96) that was used to develop relative levels of

disability incidence by age and sex for long-range assumptions.

 Figure V.C3.—DI Disabled Worker Incidence Rates, 1970-2014

[Awards per thousand disability exposed]

0

1

2

3

4

5

6

7

8

1970 1975 1980 1985 1990 1995 2000 2005 2010 2015

Calendar year

Gross incidence rates

Age-sex adjusted

incidence rates

Historical Projected

II

III

I
115

Program Assumptions and Methods

The number of disabled-worker beneficiaries having their benefits terminated during each year is projected by applying assumed termination rates to

the disabled-worker population. The termination rates are developed by age,

sex, and reason for termination.1 In addition, in the long-range period, termination rates are also assumed to vary by duration of entitlement to disabledworker benefits. To this number of terminations is added the number of disabled-worker beneficiaries who would be automatically converted to retiredworker beneficiaries upon attainment of the normal retirement age.

In the short-range period, gross death rates under the intermediate assumptions are projected to gradually decline to about 28 deaths per thousand disabled workers. The pattern of projected recovery rates under the intermediate

assumptions is consistent with assumed levels of continuing disability

reviews required to fulfill the legislative mandate for regular reviews of all

disabled beneficiaries. Under low cost (high cost) assumptions, terminations

due to death, recovery, and other reasons increase (decrease) to levels

roughly 8 percent higher (lower) than those under the intermediate assumptions.

For the long-range period, projection of death rates and recovery rates begins

with an analysis of such rates split by age, sex, and duration of entitlement

over the base period 1991-95.2 For all three sets of assumptions the ultimate

level for recovery rates for both males and females are reached in the twentieth year of the projection period. Under the intermediate assumptions ultimate recovery rates are assumed higher than the base period rate by

95 percent for males and by 93 percent for females. Death rates over the

Table V.C5.—Long-Range Ultimate Disabled Worker Age-Sex-Adjusted 

Incidence Rates1

1 Number of annual new disabled-worker entitlements per thousand disability-exposed, age-sex-adjusted to

the disability-exposed population as of January 1, 2000.

Ultimate

incidence rate

Year ultimate

rate is attained2

2 The transition to ultimate incidence rates is generally completed in 2024. However, for ages 61 through 66

incidence rates are adjusted through 2027 in order to reflect increases in the normal retirement age (NRA)

that are scheduled in the law.

Percent change from

base period 3 to ultimate rate

3 Base period rate for long-range incidence rate assumptions is 5.4 per thousand representing the average

age-sex-adjusted incidence rate for 1994-96.

Intermediate assumption . . . . . . . . . 5.8 2027 +7

Low cost assumption . . . . . . . . . . . . 4.6 2027 -15

High cost assumption. . . . . . . . . . . . 6.9 2027 +28

 1 Reasons for termination include death, recovery and (in the short range only) a small residual category of

terminations for special administrative reasons.

 2 The termination rate analysis was based on work presented in Actuarial Study 114 referenced previously.
Assumptions & Methods

116

long-range period are assumed to change gradually, at about the same trend

as for death rates in the general population, reaching levels in 2080 which are

lower than the base period level by 63 percent for males and 59 percent for

females.

Under the low cost assumptions, recovery rates and death rates are assumed

to be higher than the corresponding levels assumed for the intermediate

assumptions. Ultimate recovery rates are assumed to be higher than the base

period rate by 134 percent for males and by 131 percent for females, while

death rates are assumed to change gradually reaching levels for 2080 which

are lower than the base period level by 49 percent for males and 44 percent

for females.

Under the high cost assumptions, recovery rates and death rates are assumed

to be lower than the corresponding levels assumed for the intermediate

assumptions. Ultimate recovery rates are assumed to be higher than the base

period rate by 56 percent for males and by 54 percent for females, while

death rates are assumed to change gradually reaching levels for 2080 which

are lower than the base period level by 78 percent for males and 76 percent

for females.

These detailed projections of disabled-worker entitlements and terminations

are combined using standard multiple decrement techniques to produce projections of numbers of disabled workers in current-payment status over the

75-year projection period. These projections are presented in table V.C6. As

indicated in that table, the number of disabled workers in current-payment

status is projected to grow from 6.2 million at the end of 2004, to

11.3 million, 12.5 million, or 13.7 million at the end of 2080, under the low

cost, intermediate, or high cost assumptions, respectively. Of course, much

of this growth is a direct result of the growth and aging of the population

described earlier in this chapter.

Another way to view this projected growth in disabled workers is to compare

the size of the projected disabled-worker population to the size of the underlying disability-insured population reflecting the age-sex distribution of the

insured population as of January 1, 2000. Such a ratio eliminates the effects

of the aging population and is referred to as the disabled worker age-sexadjusted prevalence rate. Expressed in these terms, the prevalence of disability is projected to grow from 37.8 per thousand disability insured at the

beginning of 2004, to 47.8 per thousand, and 60.8 per thousand at the beginning of 2080, under the intermediate, and high cost assumptions, respectively. Under the low cost assumptions, the disability prevalence rate is

projected to decrease to 36.1 per thousand.
117

Program Assumptions and Methods

Table V.C6 also presents projections of the numbers of auxiliary beneficiaries paid from the DI Trust Fund. As indicated at the beginning of this subsection, such auxiliary beneficiaries consist of qualifying spouses and

children of disabled workers. In the case of children, the child must be either

(1) under age 18, (2) age 18 and still a student in high school, or (3) over age

18 and disabled prior to age 22. In the case of spouses, the spouse must either

be at least age 62, or have an eligible child beneficiary who is either under

age 16 or disabled in his or her care. 

In general, such auxiliary beneficiaries are projected in a manner that is

related to the projected number of disabled-worker beneficiaries. In the

short-range period, this is accomplished for family members of disabledworker beneficiaries by projecting incidence and termination rates for each

category of auxiliary beneficiary. In the long-range period, the child beneficiaries at ages 18 and under are projected in relation to the projected number

of children in the population, by applying factors representing the probability

that either of their parents is insured and disabled. Spouses eligible because

they have an eligible child in care are projected relative to the projected number of such children. The remaining categories of children and spouses are

projected in relation to the projected number of disabled-worker beneficiaries.
Assumptions & Methods

118

Table V.C6.—DI Beneficiaries With Benefits in Current-Payment Status at the End of 

Calendar Years 1960-2080

[In thousands]

Calendar year

Disabled

worker

Auxiliaries

Spouse Child Total

Historical data:

1960. . . . . . . . . . . . . . . . . . . . . . . . . . 455 77 155 687

1965. . . . . . . . . . . . . . . . . . . . . . . . . . 988 193 558 1,739

1970. . . . . . . . . . . . . . . . . . . . . . . . . . 1,493 283 889 2,665

1975. . . . . . . . . . . . . . . . . . . . . . . . . . 2,488 453 1,411 4,351

1980. . . . . . . . . . . . . . . . . . . . . . . . . . 2,856 462 1,359 4,677

1985. . . . . . . . . . . . . . . . . . . . . . . . . . 2,653 306 945 3,904

1986. . . . . . . . . . . . . . . . . . . . . . . . . . 2,725 301 965 3,991

1987. . . . . . . . . . . . . . . . . . . . . . . . . . 2,782 291 968 4,041

1988. . . . . . . . . . . . . . . . . . . . . . . . . . 2,826 281 963 4,070

1989. . . . . . . . . . . . . . . . . . . . . . . . . . 2,891 271 962 4,124

1990. . . . . . . . . . . . . . . . . . . . . . . . . . 3,007 266 989 4,261

1991. . . . . . . . . . . . . . . . . . . . . . . . . . 3,191 266 1,052 4,509

1992. . . . . . . . . . . . . . . . . . . . . . . . . . 3,464 271 1,151 4,886

1993. . . . . . . . . . . . . . . . . . . . . . . . . . 3,721 273 1,255 5,249

1994. . . . . . . . . . . . . . . . . . . . . . . . . . 3,958 271 1,350 5,579

1995. . . . . . . . . . . . . . . . . . . . . . . . . . 4,179 264 1,409 5,852

1996. . . . . . . . . . . . . . . . . . . . . . . . . . 4,378 224 1,463 6,065

1997. . . . . . . . . . . . . . . . . . . . . . . . . . 4,501 207 1,438 6,146

1998. . . . . . . . . . . . . . . . . . . . . . . . . . 4,691 190 1,446 6,327

1999. . . . . . . . . . . . . . . . . . . . . . . . . . 4,870 176 1,468 6,514

2000. . . . . . . . . . . . . . . . . . . . . . . . . . 5,036 165 1,466 6,667

2001. . . . . . . . . . . . . . . . . . . . . . . . . . 5,268 157 1,482 6,907

2002. . . . . . . . . . . . . . . . . . . . . . . . . . 5,539 152 1,526 7,217

2003. . . . . . . . . . . . . . . . . . . . . . . . . . 5,869 151 1,571 7,590

2004. . . . . . . . . . . . . . . . . . . . . . . . . . 6,198 153 1,598 7,949

Intermediate:

2005. . . . . . . . . . . . . . . . . . . . . . . . . . 6,490 156 1,614 8,260

2010. . . . . . . . . . . . . . . . . . . . . . . . . . 7,630 183 1,690 9,502

2015. . . . . . . . . . . . . . . . . . . . . . . . . . 8,417 198 1,759 10,375

2020. . . . . . . . . . . . . . . . . . . . . . . . . . 8,956 208 1,807 10,971

2025. . . . . . . . . . . . . . . . . . . . . . . . . . 9,777 254 1,954 11,985

2030. . . . . . . . . . . . . . . . . . . . . . . . . . 9,975 256 2,098 12,329

2035. . . . . . . . . . . . . . . . . . . . . . . . . . 10,183 254 2,206 12,643

2040. . . . . . . . . . . . . . . . . . . . . . . . . . 10,496 259 2,280 13,035

2045. . . . . . . . . . . . . . . . . . . . . . . . . . 11,041 275 2,328 13,644

2050. . . . . . . . . . . . . . . . . . . . . . . . . . 11,346 286 2,365 13,998

2055. . . . . . . . . . . . . . . . . . . . . . . . . . 11,662 299 2,403 14,364

2060. . . . . . . . . . . . . . . . . . . . . . . . . . 11,763 300 2,440 14,503

2065. . . . . . . . . . . . . . . . . . . . . . . . . . 11,974 307 2,478 14,759

2070. . . . . . . . . . . . . . . . . . . . . . . . . . 12,082 307 2,508 14,897

2075. . . . . . . . . . . . . . . . . . . . . . . . . . 12,319 313 2,536 15,169

2080. . . . . . . . . . . . . . . . . . . . . . . . . . 12,531 320 2,565 15,416
119

Program Assumptions and Methods

Note: Totals do not necessarily equal the sums of rounded components.

7. Average Benefits

Average benefits are projected by type of benefit based on recent historical

averages, projected average primary insurance amounts (PIAs), and projected ratios of average benefits to average PIAs. Average PIAs are calculated from projected distributions of beneficiaries by duration from year of

award, average awarded PIAs, and increases thereto since the year of award,

reflecting automatic benefit increases, recomputations to reflect additional

covered earnings, and other factors. Average awarded PIAs are calculated

from projected earnings histories, which are developed using a combination

of the actual earnings histories associated with a sample of awards made in

Low Cost:

2005. . . . . . . . . . . . . . . . . . . . . . . . . . 6,425 154 1,597 8,176

2010. . . . . . . . . . . . . . . . . . . . . . . . . . 7,184 170 1,591 8,945

2015. . . . . . . . . . . . . . . . . . . . . . . . . . 7,513 171 1,575 9,260

2020. . . . . . . . . . . . . . . . . . . . . . . . . . 7,731 172 1,587 9,490

2025. . . . . . . . . . . . . . . . . . . . . . . . . . 8,171 200 1,699 10,070

2030. . . . . . . . . . . . . . . . . . . . . . . . . . 8,144 190 1,830 10,164

2035. . . . . . . . . . . . . . . . . . . . . . . . . . 8,230 179 1,949 10,358

2040. . . . . . . . . . . . . . . . . . . . . . . . . . 8,459 177 2,049 10,685

2045. . . . . . . . . . . . . . . . . . . . . . . . . . 8,909 187 2,129 11,224

2050. . . . . . . . . . . . . . . . . . . . . . . . . . 9,192 193 2,199 11,584

2055. . . . . . . . . . . . . . . . . . . . . . . . . . 9,513 201 2,284 11,998

2060. . . . . . . . . . . . . . . . . . . . . . . . . . 9,704 201 2,377 12,282

2065. . . . . . . . . . . . . . . . . . . . . . . . . . 10,031 205 2,473 12,710

2070. . . . . . . . . . . . . . . . . . . . . . . . . . 10,351 208 2,565 13,123

2075. . . . . . . . . . . . . . . . . . . . . . . . . . 10,810 217 2,654 13,681

2080. . . . . . . . . . . . . . . . . . . . . . . . . . 11,252 225 2,743 14,219

High Cost:

2005. . . . . . . . . . . . . . . . . . . . . . . . . . 6,625 161 1,659 8,445

2010. . . . . . . . . . . . . . . . . . . . . . . . . . 8,600 214 1,933 10,747

2015. . . . . . . . . . . . . . . . . . . . . . . . . . 9,621 234 2,000 11,856

2020. . . . . . . . . . . . . . . . . . . . . . . . . . 10,511 259 2,073 12,843

2025. . . . . . . . . . . . . . . . . . . . . . . . . . 11,655 327 2,218 14,199

2030. . . . . . . . . . . . . . . . . . . . . . . . . . 12,004 342 2,337 14,684

2035. . . . . . . . . . . . . . . . . . . . . . . . . . 12,318 350 2,406 15,074

2040. . . . . . . . . . . . . . . . . . . . . . . . . . 12,718 363 2,432 15,513

2045. . . . . . . . . . . . . . . . . . . . . . . . . . 13,374 387 2,433 16,194

2050. . . . . . . . . . . . . . . . . . . . . . . . . . 13,707 399 2,432 16,538

2055. . . . . . . . . . . . . . . . . . . . . . . . . . 14,022 412 2,419 16,854

2060. . . . . . . . . . . . . . . . . . . . . . . . . . 14,015 409 2,397 16,821

2065. . . . . . . . . . . . . . . . . . . . . . . . . . 14,056 414 2,373 16,843

2070. . . . . . . . . . . . . . . . . . . . . . . . . . 13,867 406 2,341 16,614

2075. . . . . . . . . . . . . . . . . . . . . . . . . . 13,776 407 2,309 16,492

2080. . . . . . . . . . . . . . . . . . . . . . . . . . 13,668 410 2,281 16,359

Table V.C6.—DI Beneficiaries With Benefits in Current-Payment Status at the End of 

Calendar Years 1960-2080 (Cont.)

[In thousands]

Calendar year

Disabled

worker

Auxiliaries

Spouse Child Total
Assumptions & Methods

120

2003, and more recent actual earnings levels by age and sex for covered

workers.

For several types of benefits—retired-worker, aged-spouse, and agedwidow(er) benefits—the percentage of the PIA that is payable depends on

the age at initial entitlement to benefits. Projected ratios of average benefits

to average PIAs for these types of benefits are based on projections of age

distributions at initial entitlement.

8. Benefit Payments

For each type of benefit, benefit payments are calculated as the product of a

number of beneficiaries and a corresponding average monthly benefit. In the

short-range period, benefit payments are calculated on a quarterly basis. In

the long-range period, all benefit payments are calculated on an annual basis,

using the number of beneficiaries on December 31. These amounts are

adjusted to include retroactive payments to newly awarded beneficiaries, and

other amounts not reflected in the regular monthly benefit payments.

Lump-sum death payments are calculated as the product of (1) the number of

such payments, which is projected on the basis of the assumed death rates,

the projected fully insured population, and the estimated percentage of the

fully insured population that would qualify for benefits, and (2) the amount

of the lump-sum death payment, which is $255 (not indexed in future years).

9. Administrative Expenses

The projection of administrative expenses through 2014 is based on historical experience and the expected growth in average wages. Additionally, estimates for the first several years of the projection are provided by the Office

of Budget. For years after 2014, administrative expenses are assumed to

increase because of increases in the number of beneficiaries and increases in

the average wage which will more than offset assumed improvements in

administrative productivity.

10.Railroad Retirement Financial Interchange

Railroad workers are covered under a separate multi-tiered plan, the first tier

being very similar to OASDI coverage. An annual financial interchange

between the Railroad Retirement fund and the OASI and DI funds is made

reflecting the difference between (1) the amount of OASDI benefits that

would be paid to railroad workers and their families if railroad employment

had been covered under the OASDI program and administrative expenses

associated with these benefits, and (2) the amount of OASDI payroll tax and
121

Program Assumptions and Methods

income tax that would be received with allowances for interest from railroad

workers.

The effect of the financial interchange with the Railroad Retirement program

is evaluated on the basis of trends similar to those used in estimating the cost

of OASDI benefits. The resulting effect is annual short-range costs of about

$4-5 billion and a long-range summarized cost of 0.03 percent of taxable

payroll to the OASDI program.

11. Benefits to Uninsured Persons

Some older persons had little or no chance to become fully insured for Social

Security benefits during their working lifetimes. Special payments from the

OASI Trust Fund may be granted to uninsured persons who either:

(1) attained age 72 before 1968, or (2) attained age 72 in 1968 or later and

had 3 quarters of coverage for each year after 1966 and before the year of

attainment of age 72. Benefits and costs associated with uninsured persons of

the first type above are reimbursable from the General Fund of the Treasury.

All projected costs associated with reimbursable and non-reimbursable payments to uninsured persons are insignificant.

12.Military-Service Transfers

Beginning in 1966, the OASI and DI Trust Funds were reimbursed annually

for the cost (including administrative expenses) of providing additional benefit payments resulting from noncontributory wage credits for military service

performed prior to 1957. The 1983 amendments modified the reimbursement

mechanism and the timing of the reimbursements, and required a transfer in

1983 to include all future costs attributable to the wage credits. The amendments also require adjustments to that 1983 transfer every fifth year, beginning with 1985, to account for actual data.

13.Income From Taxation of Benefits

Under present law, the OASI and DI Trust Funds are credited with the additional income taxes attributable to the taxation of up to the first 50 percent of

OASI and DI benefit payments. (The remainder of the income taxes attributable to the taxation of up to 85 percent of OASI and DI benefit payments is

credited to the HI Trust Fund.)

For the short-range period, income to the trust funds from such taxation is

estimated by applying the following two factors to total OASI and DI benefit

payments: (1) the percentage of benefit payments (limited to 50 percent) that

is taxable, and (2) the average marginal tax rate applicable to those benefits.
Assumptions & Methods

122

For the long-range period, income to the trust funds from such taxation is

estimated by applying projected ratios of taxation of OASI and DI benefits to

total OASI and DI benefit payments. Because the income thresholds used for

benefit taxation are, by law, constant in the future, their values in relation to

future income and benefit levels will decline. Thus, ratios of income from

taxation of benefits to the amount of benefits are projected to increase gradually. The ultimate ratios of taxation of OASI and DI benefits are estimated by

the Office of Tax Analysis, Department of the Treasury, relating the Current

Population Survey income distribution of OASDI beneficiaries to marginal

tax rates of beneficiaries in a sample of recent tax returns. 
123

History of Trust Fund Operations

VI. APPENDICES

A. HISTORY OF OASI AND DI TRUST FUND OPERATIONS

The Federal Old-Age and Survivors Insurance (OASI) Trust Fund was established on January 1, 1940, as a separate account in the United States Treasury. The Federal Disability Insurance (DI) Trust Fund, another separate

account in the United States Treasury was established on August 1, 1956. All

the financial operations of the OASI and DI programs are handled through

these respective funds. The Board of Trustees is responsible for overseeing

the financial operations of these funds. The following paragraphs describe

the various components of trust fund income and outgo. The tables at the end

of this section present the historical operations of the separate trust funds

since their inception, as well as the operations of the combined trust funds

during the period when they have co-existed.

The primary receipts of these two funds are amounts appropriated to each of

them under permanent authority on the basis of contributions payable by

workers, their employers, and individuals with self-employment income, in

work covered by the OASDI program. All employees, and their employers,

in covered employment are required to pay contributions with respect to their

wages. Employees, and their employers, are also required to pay contributions with respect to cash tips, if the individual’s monthly cash tips amount to

at least $20. All self-employed persons are required to pay contributions with

respect to their covered net earnings from self-employment. In addition to

paying the required employer contributions on the wages of covered Federal

employees, the Federal Government also pays amounts equivalent to the

combined employer and employee contributions that would be paid on

deemed wage credits attributable to military service performed between 1957

and 2001 if such wage credits were covered wages.

In general, an individual’s contributions, or taxes, are computed on wages or

net earnings from self-employment, or both wages and net self-employment

earnings combined, up to a specified maximum annual amount. The contributions are determined first on the wages and then on any net self-employment earnings, such that the total does not exceed the annual maximum

amount. An employee who pays contributions on wages in excess of the

annual maximum amount (because of employment with two or more

employers) is eligible for a refund of the excess employee contributions.

The monthly benefit amount to which an individual (or his or her spouse and

children) may become entitled under the OASDI program is based on the

individual’s taxable earnings during his or her lifetime. For almost all per-
Appendices

124

sons who first become eligible to receive benefits in 1979 or later, the earnings used in the computation of benefits are indexed to reflect increases in

average wage levels.

The contribution, or tax, rates applicable under current law in each calendar

year and the allocation of these rates between the OASI and DI Trust Funds

are shown in table VI.A1.1 The maximum amount of earnings on which

OASDI contributions are payable in a year, which is also the maximum

amount of earnings creditable in that year for benefit-computation purposes,

is called the contribution and benefit base. The contribution and benefit base

for each year through 2005 is also shown in table VI.A1.

 1 The contribution rates for the Hospital Insurance (HI) program, and for the OASDI and HI programs combined, are shown in table VI.F1.

Table VI.A1.—Contribution and Benefit Base and Contribution Rates

Calendar years

Contribution

and benefit 

base

Contribution rates (percent)

Employees and employers, each Self-employed

OASDI OASI DI OASDI OASI DI

1937-49 . . . . . . . . . $3,000 1.000 1.000 — — — —

1950. . . . . . . . . . . . 3,000 1.500 1.500 — — — —

1951-53 . . . . . . . . . 3,600 1.500 1.500 — 2.2500 2.2500 —

1954. . . . . . . . . . . . 3,600 2.000 2.000 — 3.0000 3.0000 —

1955-56 . . . . . . . . . 4,200 2.000 2.000 — 3.0000 3.0000 —

1957-58 . . . . . . . . . 4,200 2.250 2.000 0.250 3.3750 3.0000 0.3750

1959. . . . . . . . . . . . 4,800 2.500 2.250 .250 3.7500 3.3750 .3750

1960-61 . . . . . . . . . 4,800 3.000 2.750 .250 4.5000 4.1250 .3750

1962. . . . . . . . . . . . 4,800 3.125 2.875 .250 4.7000 4.3250 .3750

1963-65 . . . . . . . . . 4,800 3.625 3.375 .250 5.4000 5.0250 .3750

1966. . . . . . . . . . . . 6,600 3.850 3.500 .350 5.8000 5.2750 .5250

1967. . . . . . . . . . . . 6,600 3.900 3.550 .350 5.9000 5.3750 .5250

1968. . . . . . . . . . . . 7,800 3.800 3.325 .475 5.8000 5.0875 .7125

1969. . . . . . . . . . . . 7,800 4.200 3.725 .475 6.3000 5.5875 .7125

1970. . . . . . . . . . . . 7,800 4.200 3.650 .550 6.3000 5.4750 .8250

1971. . . . . . . . . . . . 7,800 4.600 4.050 .550 6.9000 6.0750 .8250

1972. . . . . . . . . . . . 9,000 4.600 4.050 .550 6.9000 6.0750 .8250

1973. . . . . . . . . . . . 10,800 4.850 4.300 .550 7.0000 6.2050 .7950

1974. . . . . . . . . . . . 13,200 4.950 4.375 .575 7.0000 6.1850 .8150

1975. . . . . . . . . . . . 14,100 4.950 4.375 .575 7.0000 6.1850 .8150

1976. . . . . . . . . . . . 15,300 4.950 4.375 .575 7.0000 6.1850 .8150

1977. . . . . . . . . . . . 16,500 4.950 4.375 .575 7.0000 6.1850 .8150

1978. . . . . . . . . . . . 17,700 5.050 4.275 .775 7.1000 6.0100 1.0900

1979. . . . . . . . . . . . 22,900 5.080 4.330 .750 7.0500 6.0100 1.0400

1980. . . . . . . . . . . . 25,900 5.080 4.520 .560 7.0500 6.2725 .7775

1981. . . . . . . . . . . . 29,700 5.350 4.700 .650 8.0000 7.0250 .9750

1982. . . . . . . . . . . . 32,400 5.400 4.575 .825 8.0500 6.8125 1.2375

1983. . . . . . . . . . . . 35,700 5.400 4.775 .625 8.0500 7.1125 .9375

19841. . . . . . . . . . . 37,800 5.700 5.200 .500 11.4000 10.4000 1.0000

19851. . . . . . . . . . . 39,600 5.700 5.200 .500 11.4000 10.4000 1.0000

19861. . . . . . . . . . . 42,000 5.700 5.200 .500 11.4000 10.4000 1.0000

19871. . . . . . . . . . . 43,800 5.700 5.200 .500 11.4000 10.4000 1.0000

19881. . . . . . . . . . . 45,000 6.060 5.530 .530 12.1200 11.0600 1.0600
125

History of Trust Fund Operations

All contributions are collected by the Internal Revenue Service and deposited in the General Fund of the Treasury. The contributions are immediately

and automatically appropriated to the trust funds on an estimated basis. The

exact amount of contributions received is not known initially because the

OASDI and HI contributions and individual income taxes are not separately

identified in collection reports received by the Internal Revenue Service.

Periodic adjustments are subsequently made to the extent that the estimates

are found to differ from the amounts of contributions actually payable as

determined from reported earnings. Adjustments are also made to account

for any refunds to employees (with more than one employer) who paid contributions on wages in excess of the contribution and benefit base.

Beginning in 1984, up to one-half of an individual’s or couple’s OASDI benefits was subject to Federal income taxation under certain circumstances.

Effective for taxable years beginning after 1993, the maximum percentage of

benefits subject to taxation was increased from 50 percent to 85 percent. The

proceeds from taxation of up to 50 percent of benefits are credited to the

OASI and DI Trust Funds in advance, on an estimated basis, at the beginning

19891. . . . . . . . . . . $48,000 6.060 5.530 0.530 12.1200 11.0600 1.0600

1990 . . . . . . . . . . . 51,300 6.200 5.600 .600 12.4000 11.2000 1.2000

1991. . . . . . . . . . . . 53,400 6.200 5.600 .600 12.4000 11.2000 1.2000

1992. . . . . . . . . . . . 55,500 6.200 5.600 .600 12.4000 11.2000 1.2000

1993. . . . . . . . . . . . 57,600 6.200 5.600 .600 12.4000 11.2000 1.2000

1994. . . . . . . . . . . . 60,600 6.200 5.260 .940 12.4000 10.5200 1.8800

1995. . . . . . . . . . . . 61,200 6.200 5.260 .940 12.4000 10.5200 1.8800

1996. . . . . . . . . . . . 62,700 6.200 5.260 .940 12.4000 10.5200 1.8800

1997. . . . . . . . . . . . 65,400 6.200 5.350 .850 12.4000 10.7000 1.7000

1998. . . . . . . . . . . . 68,400 6.200 5.350 .850 12.4000 10.7000 1.7000

1999. . . . . . . . . . . . 72,600 6.200 5.350 .850 12.4000 10.7000 1.7000

2000. . . . . . . . . . . . 76,200 6.200 5.300 .900 12.4000 10.6000 1.8000

2001. . . . . . . . . . . . 80,400 6.200 5.300 .900 12.4000 10.6000 1.8000

2002. . . . . . . . . . . . 84,900 6.200 5.300 .900 12.4000 10.6000 1.8000

2003. . . . . . . . . . . . 87,000 6.200 5.300 .900 12.4000 10.6000 1.8000

2004. . . . . . . . . . . . 87,900 6.200 5.300 .900 12.4000 10.6000 1.8000

2005. . . . . . . . . . . . 90,000 6.200 5.300 .900 12.4000 10.6000 1.8000

2006 and later . . . . 2/ 6.200 5.300 .900 12.4000 10.6000 1.8000

1 In 1984 only, an immediate credit of 0.3 percent of taxable wages was allowed against the OASDI contributions paid by employees, which resulted in an effective contribution rate of 5.4 percent. The appropriations of

contributions to the trust funds, however, were based on the combined employee-employer rate of 11.4 percent,

as if the credit for employees did not apply. Similar credits of 2.7 percent, 2.3 percent, and 2.0 percent were

allowed against the combined OASDI and Hospital Insurance (HI) contributions on net earnings from selfemployment in 1984, 1985, and 1986-89, respectively. Beginning in 1990, self-employed persons are allowed a

deduction, for purposes of computing their net earnings, equal to half of the combined OASDI and HI contributions that would be payable without regard to the contribution and benefit base. The OASDI contribution rate is

then applied to net earnings after this deduction, but subject to the OASDI base.

2 Subject to automatic adjustment based on increases in average wages.

Table VI.A1.—Contribution and Benefit Base and Contribution Rates (Cont.)

Calendar years

Contribution

and benefit 

base

Contribution rates (percent)

Employees and employers, each Self-employed

OASDI OASI DI OASDI OASI DI
Appendices

126

of each calendar quarter, with no reimbursement to the general fund for interest costs attributable to the advance transfers.1 Subsequent adjustments are

made based on the actual amounts as shown on annual income tax records.

The amounts appropriated from the General Fund of the Treasury are allocated to the OASI and DI Trust Funds on the basis of the income taxes paid

on the benefits from each fund.2

Another source of income to the trust funds is interest received on investments held by the trust funds. That portion of each trust fund which is not

required to meet the current cost of benefits and administration is invested,

on a daily basis, primarily in interest-bearing obligations of the U.S. Government (including special public-debt obligations described below). Investments may also be made in obligations guaranteed as to both principal and

interest by the United States, including certain Federally sponsored agency

obligations that are designated in the laws authorizing their issuance as lawful investments for fiduciary and trust funds under the control and authority

of the United States or any officer of the United States. These obligations

may be acquired on original issue at the issue price or by purchase of outstanding obligations at their market price.

The Social Security Act authorizes the issuance of special public-debt obligations for purchase exclusively by the trust funds. The Act provides that the

interest rate on new special obligations will be the average market yield, as

of the last business day of a month, on all of the outstanding marketable U.S.

obligations that are due or callable more than 4 years in the future. The rate

so calculated is rounded to the nearest one-eighth of one percent and applies

to new issues in the following month. Beginning January 1999, in calculating

the average market yield rate for this purpose, the Treasury incorporates the

yield to the call date when a callable bond’s market price is above par.

Although the special issues cannot be bought or sold in the open market, they

are nonetheless redeemable at any time at par value and thus bear no risk of

fluctuations in principal value due to changes in market yield rates. Just as in

the case of marketable Treasury securities held by the public, all of the

investments held by the trust funds are backed by the full faith and credit of

the U.S. Government.

 1 The additional tax revenues resulting from the increase to 85 percent are transferred to the HI Trust Fund. 2 A special provision applies to benefits paid to nonresident aliens. Under Public Law 103-465, effective for

taxable years beginning after 1994, a flat-rate tax, usually 25.5 percent, is withheld from the benefits before

they are paid and, therefore, remains in the trust funds. From 1984 to 1994 the flat-rate tax that was withheld

was usually 15 percent.
127

History of Trust Fund Operations

Income is also affected by provisions of the Social Security Act for (1) transfers between the General Fund of the Treasury and the OASI and DI Trust

Funds for any adjustments to prior payments for the cost arising from the

granting of noncontributory wage credits for military service prior to 1957,

according to periodic determinations; (2) annual reimbursements from the

General Fund of the Treasury to the OASI Trust Fund for any costs arising

from the special monthly cash payments to certain uninsured persons—i.e.,

those who attained age 72 before 1968 and who generally are not eligible for

cash benefits under other provisions of the OASDI program; and (3) the

receipt of unconditional money gifts or bequests made for the benefit of the

trust funds or any activity financed through the funds.

The primary expenditures of the OASI and DI Trust Funds are for (1)

OASDI benefit payments, net of any reimbursements from the General Fund

of the Treasury for unnegotiated benefit checks, and (2) expenses incurred by

the Social Security Administration and the Department of the Treasury in

administering the OASDI program and the provisions of the Internal Revenue Code relating to the collection of contributions. Such administrative

expenses include expenditures for construction, rental and lease, or purchase

of office buildings and related facilities for the Social Security Administration. The Social Security Act does not permit expenditures from the OASI

and DI Trust Funds for any purpose not related to the payment of benefits or

administrative costs for the OASDI program.

The expenditures of the trust funds also include (1) the costs of vocational

rehabilitation services furnished as an additional benefit to disabled persons

receiving cash benefits because of their disabilities where such services contributed to their successful rehabilitation, and (2) net costs resulting from the

provisions of the Railroad Retirement Act which provide for a system of

coordination and financial interchange between the Railroad Retirement program and the Social Security program. Under the latter provisions, transfers

between the Railroad Retirement program’s Social Security Equivalent Benefit Account and the trust funds are made on an annual basis in order to place

each trust fund in the same position in which it would have been if railroad

employment had always been covered under Social Security.

The net worth of facilities and other fixed capital assets is not carried in the

statements of the operations of the trust funds presented in this report. This is

because the value of fixed capital assets is not available in the form of a

financial asset redeemable for the payment of benefits or administrative

expenditures, and therefore is not considered in assessing the actuarial status

of the trust funds.
Appendices

128

Table VI.A2.—Historical Operations of the OASI Trust Fund, 

Calendar Years 1937-2004

[Amounts in billions]

Calendar

year

Income Expenditures Assets

Total1

Net

contributions2

Taxation of

benefits

Net

interest3 Total

Benefit

payments4

Administrative

costs

RRB

interchange

Net

increase

during

year

Amount

at end

of year

Trust

Fund

ratio5

1937 . . . $0.8 $0.8 — 6/ 6/1 6/1 — — $0.8 $0.8 100

1938 . . . .4 .4 — 6/1 6/1 6/1 — — .4 1.1 7,660

1939 . . . .6 .6 — 6/1 6/1 6/1 — — .6 1.7 8,086

1940 . . . .4 .3 — 6/1 $0.1 6/1 6/1 — .3 2.0 2,781

1941 . . . .8 .8 — $0.1 .1 $0.1 6/1 — .7 2.8 1,782

1942 . . . 1.1 1.0 — .1 .2 .1 6/1 — .9 3.7 1,737

1943 . . . 1.3 1.2 — .1 .2 .2 6/1 — 1.1 4.8 1,891

1944 . . . 1.4 1.3 — .1 .2 .2 6/1 — 1.2 6.0 2,025

1945 . . . 1.4 1.3 — .1 .3 .3 6/1 — 1.1 7.1 1,975

1946 . . . 1.4 1.3 — .2 .4 .4 6/1 — 1.0 8.2 1,704

1947 . . . 1.7 1.6 — .2 .5 .5 6/1 — 1.2 9.4 1,592

1948 . . . 2.0 1.7 — .3 .6 .6 $0.1 — 1.4 10.7 1,542

1949 . . . 1.8 1.7 — .1 .7 .7 .1 — 1.1 11.8 1,487

1950 . . . 2.9 2.7 — .3 1.0 1.0 .1 — 1.9 13.7 1,156

1951 . . . 3.8 3.4 — .4 2.0 1.9 .1 — 1.8 15.5 698

1952 . . . 4.2 3.8 — .4 2.3 2.2 .1 — 1.9 17.4 681

1953 . . . 4.4 3.9 — .4 3.1 3.0 .1 — 1.3 18.7 564

1954 . . . 5.6 5.2 — .4 3.7 3.7 .1 6/1 1.9 20.6 500

1955 . . . 6.2 5.7 — .5 5.1 5.0 .1 6/1 1.1 21.7 405

1956 . . . 6.7 6.2 — .5 5.8 5.7 .1 6/1 .9 22.5 371

1957 . . . 7.4 6.8 — .6 7.5 7.3 .2 6/1 -.1 22.4 300

1958 . . . 8.1 7.6 — .6 8.6 8.3 .2 $0.1 -.5 21.9 259

1959 . . . 8.6 8.1 — .5 10.3 9.8 .2 .3 -1.7 20.1 212

1960 . . . 11.4 10.9 — .5 11.2 10.7 .2 .3 .2 20.3 180

1961 . . . 11.8 11.3 — .5 12.4 11.9 .2 .3 -.6 19.7 163

1962 . . . 12.6 12.1 — .5 14.0 13.4 .3 .4 -1.4 18.3 141

1963 . . . 15.1 14.5 — .5 14.9 14.2 .3 .4 .1 18.5 123

1964 . . . 16.3 15.7 — .6 15.6 14.9 .3 .4 .6 19.1 118

1965 . . . 16.6 16.0 — .6 17.5 16.7 .3 .4 -.9 18.2 109

1966 . . . 21.3 20.6 — .6 19.0 18.3 .3 .4 2.3 20.6 96

1967 . . . 24.0 23.1 — .8 20.4 19.5 .4 .5 3.7 24.2 101

1968 . . . 25.0 23.7 — .9 23.6 22.6 .5 .4 1.5 25.7 103

1969 . . . 29.6 27.9 — 1.2 25.2 24.2 .5 .5 4.4 30.1 102

1970 . . . 32.2 30.3 — 1.5 29.8 28.8 .5 .6 2.4 32.5 101

1971 . . . 35.9 33.7 — 1.7 34.5 33.4 .5 .6 1.3 33.8 94

1972 . . . 40.1 37.8 — 1.8 38.5 37.1 .7 .7 1.5 35.3 88

1973 . . . 48.3 46.0 — 1.9 47.2 45.7 .6 .8 1.2 36.5 75

1974 . . . 54.7 52.1 — 2.2 53.4 51.6 .9 .9 1.3 37.8 68

1975 . . . 59.6 56.8 — 2.4 60.4 58.5 .9 1.0 -.8 37.0 63

1976 . . . 66.3 63.4 — 2.3 67.9 65.7 1.0 1.2 -1.6 35.4 54

1977 . . . 72.4 69.6 — 2.2 75.3 73.1 1.0 1.2 -2.9 32.5 47

1978 . . . 78.1 75.5 — 2.0 83.1 80.4 1.1 1.6 -5.0 27.5 39

1979 . . . 90.3 87.9 — 1.8 93.1 90.6 1.1 1.4 -2.9 24.7 30
129

History of Trust Fund Operations

Note: Totals do not necessarily equal the sums of rounded components.

1980 . . . $105.8 $103.4 — $1.8 $107.7 $105.1 $1.2 $1.4 -$1.8 $22.8 23

1981 . . . 125.4 122.6 — 2.1 126.7 123.8 1.3 1.6 -1.3 21.5 18

1982 . . . 125.2 123.7 — .8 142.1 138.8 1.5 1.8 .6 22.1 15

1983 . . . 150.6 138.3 — 6.7 153.0 149.2 1.5 2.3 -2.4 19.7 14

1984 . . . 169.3 164.1 $2.8 2.3 161.9 157.8 1.6 2.4 7.4 27.1 20

1985 . . . 184.2 177.0 3.2 1.9 171.2 167.2 1.6 2.3 78.7 35.8 24

1986 . . . 197.4 190.7 3.4 3.1 181.0 176.8 1.6 2.6 7 3.2 39.1 28

1987 . . . 210.7 202.7 3.3 4.7 187.7 183.6 1.5 2.6 23.1 62.1 30

1988 . . . 240.8 229.8 3.4 7.6 200.0 195.5 1.8 2.8 40.8 102.9 41

1989 . . . 264.7 250.2 2.4 12.0 212.5 208.0 1.7 2.8 52.2 155.1 59

1990 . . . 286.7 267.5 4.8 16.4 227.5 223.0 1.6 3.0 59.1 214.2 78

1991 . . . 299.3 272.6 5.9 20.8 245.6 240.5 1.8 3.4 53.7 267.8 87

1992 . . . 311.2 281.0 5.9 24.3 259.9 254.9 1.8 3.1 51.3 319.2 103

1993 . . . 323.3 290.9 5.3 27.0 273.1 267.8 2.0 3.4 50.2 369.3 117

1994 . . . 328.3 293.3 5.0 29.9 284.1 279.1 1.6 3.4 44.1 413.5 130

1995 . . . 342.8 304.6 5.5 32.8 297.8 291.6 2.1 4.1 45.0 458.5 139

1996 . . . 363.7 321.6 6.5 35.7 308.2 302.9 1.8 3.6 55.5 514.0 149

1997 . . . 397.2 349.9 7.4 39.8 322.1 316.3 2.1 3.7 75.1 589.1 160

1998 . . . 424.8 371.2 9.1 44.5 332.3 326.8 1.9 3.7 92.5 681.6 177

1999 . . . 457.0 396.4 10.9 49.8 339.9 334.4 1.8 3.7 117.2 798.8 201

2000 . . . 490.5 421.4 11.6 57.5 358.3 352.7 2.1 3.5 132.2 931.0 223

2001 . . . 518.1 441.5 11.9 64.7 377.5 372.3 2.0 3.3 140.6 1,071.5 247

2002 . . . 539.7 455.2 12.9 71.2 393.7 388.1 2.1 3.5 146.0 1,217.5 272

2003 . . . 543.8 456.1 12.5 75.2 406.0 399.8 2.6 3.6 137.8 1,355.3 300

2004 . . . 566.3 472.8 14.6 79.0 421.0 415.0 2.4 3.6 145.3 1,500.6 322

1 Includes payments from the General Fund of the Treasury to the trust funds (1) in 1947-51 and in 1966 and

later, costs of noncontributory wage credits for military service performed before 1957; (2) in 1971-82, costs of

deemed wage credits for military service performed after 1956; and (3) in 1968 and later, costs of benefits to

certain uninsured persons who attained age 72 before 1968. Differences in past year total income and sum of

individual column amounts are due to these payments. OASI historical payments from the General Fund of the

Treasury may be found on the Internet at www.socialsecurity.gov/OACT/STATS/t4a1Income.html.

2 Beginning in 1983, includes transfers from the General Fund of the Treasury representing contributions that

would have been paid on deemed wage credits for military service in 1957 through 2001, if such credits were

considered to be covered wages.

3 Net interest includes net profits or losses on marketable investments. Beginning in 1967, administrative

expenses are charged to the trust fund on an estimated basis, with a final adjustment, including interest, made in

the following fiscal year. The amounts of these interest adjustments are included in net interest. For years prior

to 1967, a description of the method of accounting for administrative expenses is contained in the 1970 Annual

Report. Beginning in October 1973, the figures shown include relatively small amounts of gifts to the fund. Net

interest for 1983-86 reflects payments from a borrowing trust fund to a lending trust fund for interest on

amounts owed under the interfund borrowing provisions. During 1983-90, interest paid from the trust fund to

the general fund on advance tax transfers is reflected. The amount shown for 1985 includes an interest adjustment of $88 million on unnegotiated checks issued before April 1985.

4 Beginning in 1966, includes payments for vocational rehabilitation services furnished to disabled persons

receiving benefits because of their disabilities. Beginning in 1983, amounts are reduced by amount of reimbursement for unnegotiated benefit checks.

5 The “Trust fund ratio” column represents assets at the beginning of a year as a percentage of expenditures during the year. For years 1984-90, assets at the beginning of a year include January advance tax transfers.

6 Less than $50 million.

7 Reflects offset for repayment from the OASI Trust Fund of amounts borrowed from the DI and HI Trust Funds

in 1982. The amount repaid in 1985 was $4.4 billion; in 1986, the amount was $13.2 billion.

Table VI.A2.—Historical Operations of the OASI Trust Fund, 

Calendar Years 1937-2004 (Cont.)

[Amounts in billions]

Calendar

year

Income Expenditures Assets

Total1

Net

contributions2

Taxation of

benefits

Net

interest3 Total

Benefit

payments4

Administrative

costs

RRB

interchange

Net

increase

during

year

Amount

at end

of year

Trust

Fund

ratio5
Appendices

130

Table VI.A3.—Historical Operations of the DI Trust Fund, 

Calendar Years 1957-2004

[Amounts in billions]

Calendar

year

Income Expenditures Assets

Total 1

Net

contributions2

Taxation of

benefits

Net

interest3 Total

Benefit

payments4

Administrative

costs

RRB

interchange

Net

increase

during

year

Amount

at end

of year

Trust

Fund

ratio5

1957. . . $0.7 $0.7 — 6/ $0.1 $0.1 6/1 — $0.6 $0.6 100

1958. . . 1.0 1.0 — 6/1 .3 .2 6/1 — .7 1.4 249

1959. . . .9 .9 — 6/1 .5 .5 $0.1 6/1 .4 1.8 284

1960. . . 1.1 1.0 — $0.1 .6 .6 6/1 6/1 .5 2.3 304

1961. . . 1.1 1.0 — .1 1.0 .9 .1 6/1 .1 2.4 239

1962. . . 1.1 1.0 — .1 1.2 1.1 .1 6/1 -.1 2.4 206

1963. . . 1.2 1.1 — .1 1.3 1.2 .1 6/1 -.1 2.2 183

1964. . . 1.2 1.2 — .1 1.4 1.3 .1 6/1 -.2 2.0 159

1965. . . 1.2 1.2 — .1 1.7 1.6 .1 6/1 -.4 1.6 121

1966. . . 2.1 2.0 — .1 1.9 1.8 .1 6/1 .1 1.7 82

1967. . . 2.4 2.3 — .1 2.1 2.0 .1 6/1 .3 2.0 83

1968. . . 3.5 3.3 — .1 2.5 2.3 .1 6/1 1.0 3.0 83

1969. . . 3.8 3.6 — .2 2.7 2.6 .1 6/1 1.1 4.1 111

1970. . . 4.8 4.5 — .3 3.3 3.1 .2 6/1 1.5 5.6 126

1971. . . 5.0 4.6 — .4 4.0 3.8 .2 6/1 1.0 6.6 140

1972. . . 5.6 5.1 — .4 4.8 4.5 .2 6/1 .8 7.5 140

1973. . . 6.4 5.9 — .5 6.0 5.8 .2 6/1 .5 7.9 125

1974. . . 7.4 6.8 — .5 7.2 7.0 .2 6/1 .2 8.1 110

1975. . . 8.0 7.4 — .5 8.8 8.5 .3 6/1 -.8 7.4 92

1976. . . 8.8 8.2 — .4 10.4 10.1 .3 6/1 -1.6 5.7 71

1977. . . 9.6 9.1 — .3 11.9 11.5 .4 6/1 -2.4 3.4 48

1978. . . 13.8 13.4 — .3 13.0 12.6 .3 6/1 .9 4.2 26

1979. . . 15.6 15.1 — .4 14.2 13.8 .4 6/1 1.4 5.6 30

1980. . . 13.9 13.3 — .5 15.9 15.5 .4 6/1 -2.0 3.6 35

1981. . . 17.1 16.7 — .2 17.7 17.2 .4 6/1 -.6 3.0 21

1982. . . 22.7 22.0 — .5 18.0 17.4 .6 6/1 -.4 2.7 17

1983. . . 20.7 18.0 — 1.6 18.2 17.5 .6 6/1 2.5 5.2 15

1984. . . 17.3 15.9 $0.2 1.2 18.5 17.9 .6 6/1 -1.2 4.0 35

1985. . . 19.3 17.2 .2 .9 19.5 18.8 .6 6/1 72.4 6.3 27

1986. . . 19.4 18.4 .2 .8 20.5 19.9 .6 $0.1 71.5 7.8 38

1987. . . 20.3 19.7 6/1 .6 21.4 20.5 .8 .1 -1.1 6.7 44

1988. . . 22.7 22.0 .1 .6 22.5 21.7 .7 .1 .2 6.9 38

1989. . . 24.8 24.0 .1 .7 23.8 22.9 .8 .1 1.0 7.9 38

1990. . . 28.8 28.5 .1 .9 25.6 24.8 .7 .1 3.2 11.1 40

1991. . . 30.4 29.1 .2 1.1 28.6 27.7 .8 .1 1.8 12.9 39

1992. . . 31.4 30.1 .2 1.1 32.0 31.1 .8 .1 -.6 12.3 40

1993. . . 32.3 31.2 .3 .8 35.7 34.6 1.0 .1 -3.4 9.0 35

1994. . . 52.8 51.4 .3 1.2 38.9 37.7 1.0 .1 14.0 22.9 23

1995. . . 56.7 54.4 .3 2.2 42.1 40.9 1.1 .1 14.6 37.6 55

1996. . . 60.7 57.3 .4 3.0 45.4 44.2 1.2 6/1 15.4 52.9 83

1997. . . 60.5 56.0 .5 4.0 47.0 45.7 1.3 .1 13.5 66.4 113

1998. . . 64.4 59.0 .6 4.8 49.9 48.2 1.6 .2 14.4 80.8 133

1999. . . 69.5 63.2 .7 5.7 53.0 51.4 1.5 .1 16.5 97.3 152

2000. . . 77.9 71.1 .7 6.9 56.8 55.0 1.6 .2 21.1 118.5 171

2001. . . 83.9 74.9 .8 8.2 61.4 59.6 1.7 6/1 22.5 141.0 193

2002. . . 87.4 77.3 .9 9.2 67.9 65.7 2.0 .2 19.5 160.5 208

2003. . . 88.1 77.4 .9 9.7 73.1 70.9 2.0 .2 15.0 175.4 219

2004. . . 91.4 80.3 1.1 10.0 80.6 78.2 2.2 .2 10.8 186.2 218
131

History of Trust Fund Operations

Note: Totals do not necessarily equal the sums of rounded components.

1 Includes payments from the General Fund of the Treasury to the trust funds (1) beginning in 1966 and later,

costs of noncontributory wage credits for military service performed before 1957 and (2) in 1971-82, costs of

deemed wage credits for military service performed after 1956. Differences in past year total income and sum of

individual column amounts are due to these payments. DI historical payments from the General Fund of the Treasury may be found on the Internet at www.socialsecurity.gov/OACT/STATS/t4a2Income.html.

2 Beginning in 1983, includes transfers from the General Fund of the Treasury representing contributions that

would have been paid on deemed wage credits for military service in 1957 through 2001, if such credits were

considered to be covered wages.

3 Net interest includes net profits or losses on marketable investments. Beginning in 1967, administrative

expenses are charged to the trust fund on an estimated basis, with a final adjustment, including interest, made in

the following fiscal year. The amounts of these interest adjustments are included in net interest. For years prior to

1967, a description of the method of accounting for administrative expenses is contained in the 1970 Annual

Report. Beginning in July 1974, the figures shown include relatively small amounts of gifts to the fund. Net interest for 1983-86 reflects payments from a borrowing trust fund to a lending trust fund for interest on amounts

owed under the interfund borrowing provisions. During 1983-90, interest paid from the trust fund to the general

fund on advance tax transfers is reflected. The amount shown for 1985 includes an interest adjustment of

$14.8 million on unnegotiated checks issued before April 1985.

4 Beginning in 1966, includes payments for vocational rehabilitation services furnished to disabled persons

receiving benefits because of their disabilities. Beginning in 1983, amounts are reduced by amount of reimbursement for unnegotiated benefit checks.

5 The “Trust fund ratio” column represents assets at the beginning of a year as a percentage of expenditures during the year. For years 1984-90, assets at the beginning of a year include January advance tax transfers.

6 Less than $50 million.

7 Reflects offset for repayment from the OASI Trust Fund of amounts borrowed from the DI Trust Fund in 1982.

An amount of $2.5 billion was repaid in each year 1985 and 1986.
Appendices

132

Table VI.A4.—Historical Operations of the Combined OASI and DI Trust Funds,

Calendar Years 1957-2004

[Amounts in billions]

Calendar

year

Income Expenditures Assets

Total1

Net

contributions2

Taxation of

benefits

Net

interest3 Total

Benefit

payments4

Administrative

costs

RRB

interchange

Net

increase

during

year

Amount

at end

of year

Trust

Fund

ratio5

1957 . . . $8.1 $7.5 — $0.6 $7.6 $7.4 $0.2 6/ $0.5 $23.0 298

1958 . . . 9.1 8.5 — .6 8.9 8.6 .2 $0.1 .2 23.2 259

1959 . . . 9.5 8.9 — .6 10.8 10.3 .2 .3 -1.3 22.0 215

1960 . . . 12.4 11.9 — .6 11.8 11.2 .2 .3 .6 22.6 186

1961 . . . 12.9 12.3 — .6 13.4 12.7 .3 .3 -.5 22.2 169

1962 . . . 13.7 13.1 — .6 15.2 14.5 .3 .4 -1.5 20.7 146

1963 . . . 16.2 15.6 — .6 16.2 15.4 .3 .4 6/1 20.7 128

1964 . . . 17.5 16.8 — .6 17.0 16.2 .4 .4 .5 21.2 122

1965 . . . 17.9 17.2 — .7 19.2 18.3 .4 .5 -1.3 19.8 110

1966 . . . 23.4 22.6 — .7 20.9 20.1 .4 .5 2.5 22.3 95

1967 . . . 26.4 25.4 — .9 22.5 21.4 .5 .5 3.9 26.3 99

1968 . . . 28.5 27.0 — 1.0 26.0 25.0 .6 .5 2.5 28.7 101

1969 . . . 33.3 31.5 — 1.3 27.9 26.8 .6 .5 5.5 34.2 103

1970 . . . 37.0 34.7 — 1.8 33.1 31.9 .6 .6 3.9 38.1 103

1971 . . . 40.9 38.3 — 2.0 38.5 37.2 .7 .6 2.4 40.4 99

1972 . . . 45.6 42.9 — 2.2 43.3 41.6 .9 .7 2.3 42.8 93

1973 . . . 54.8 51.9 — 2.4 53.1 51.5 .8 .8 1.6 44.4 80

1974 . . . 62.1 58.9 — 2.7 60.6 58.6 1.1 .9 1.5 45.9 73

1975 . . . 67.6 64.3 — 2.9 69.2 67.0 1.2 1.0 -1.5 44.3 66

1976 . . . 75.0 71.6 — 2.7 78.2 75.8 1.2 1.2 -3.2 41.1 57

1977 . . . 82.0 78.7 — 2.5 87.3 84.7 1.4 1.2 -5.3 35.9 47

1978 . . . 91.9 88.9 — 2.3 96.0 93.0 1.4 1.6 -4.1 31.7 37

1979 . . . 105.9 103.0 — 2.2 107.3 104.4 1.5 1.5 -1.5 30.3 30

1980 . . . 119.7 116.7 — 2.3 123.6 120.6 1.5 1.4 -3.8 26.5 25

1981 . . . 142.4 139.4 — 2.2 144.4 141.0 1.7 1.6 -1.9 24.5 18

1982 . . . 147.9 145.7 — 1.4 160.1 156.2 2.1 1.8 .2 24.8 15

1983 . . . 171.3 156.3 — 8.3 171.2 166.7 2.2 2.3 .1 24.9 14

1984 . . . 186.6 180.1 $3.0 3.4 180.4 175.7 2.3 2.4 6.2 31.1 21

1985 . . . 203.5 194.1 3.4 2.7 190.6 186.1 2.2 2.4 711.1 42.2 24

1986 . . . 216.8 209.1 3.7 3.9 201.5 196.7 2.2 2.7 7 4.7 46.9 29

1987 . . . 231.0 222.4 3.2 5.3 209.1 204.1 2.4 2.6 21.9 68.8 31

1988 . . . 263.5 251.8 3.4 8.2 222.5 217.1 2.5 2.9 41.0 109.8 41

1989 . . . 289.4 274.2 2.5 12.7 236.2 230.9 2.4 2.9 53.2 163.0 57

1990 . . . 315.4 296.1 5.0 17.2 253.1 247.8 2.3 3.0 62.3 225.3 75

1991 . . . 329.7 301.7 6.1 21.9 274.2 268.2 2.6 3.5 55.5 280.7 82

1992 . . . 342.6 311.1 6.1 25.4 291.9 286.0 2.7 3.2 50.7 331.5 96

1993 . . . 355.6 322.1 5.6 27.9 308.8 302.4 3.0 3.4 46.8 378.3 107

1994 . . . 381.1 344.7 5.3 31.1 323.0 316.8 2.7 3.5 58.1 436.4 117

1995 . . . 399.5 359.0 5.8 35.0 339.8 332.6 3.1 4.1 59.7 496.1 128

1996 . . . 424.5 378.9 6.8 38.7 353.6 347.1 3.0 3.6 70.9 567.0 140

1997 . . . 457.7 406.0 7.9 43.8 369.1 362.0 3.4 3.7 88.6 655.5 154

1998 . . . 489.2 430.2 9.7 49.3 382.3 375.0 3.5 3.8 107.0 762.5 171

1999 . . . 526.6 459.6 11.6 55.5 392.9 385.8 3.3 3.8 133.7 896.1 194

2000 . . . 568.4 492.5 12.3 64.5 415.1 407.6 3.8 3.7 153.3 1,049.4 216

2001 . . . 602.0 516.4 12.7 72.9 438.9 431.9 3.7 3.3 163.1 1,212.5 239

2002 . . . 627.1 532.5 13.8 80.4 461.7 453.8 4.2 3.6 165.4 1,378.0 263

2003 . . . 631.9 533.5 13.4 84.9 479.1 470.8 4.6 3.7 152.8 1,530.8 288

2004 . . . 657.7 553.0 15.7 89.0 501.6 493.3 4.5 3.8 156.1 1,686.8 305
133

History of Trust Fund Operations

Note: Totals do not necessarily equal the sums of rounded components.

Tables VI.A5 and VI.A6 show the total assets of the OASI Trust Fund and

the DI Trust Fund, respectively, at the end of each calendar year 2003 and

2004. These assets are separated by interest rate and year of maturity. Assets

grouped with multiple years of maturity are distributed evenly across those

years. Bonds issued to the trust funds in 2004 had an interest rate of 4.625

percent, compared with an interest rate of 3.5 percent for bonds issued in

2003.

1 Includes payments from the General Fund of the Treasury to the trust funds (1) beginning in 1966 and later,

costs of noncontributory wage credits for military service performed before 1957; (2) in 1971-82, costs of

deemed wage credits for military service performed after 1956; and (3) in 1968 and later, costs of benefits to certain uninsured persons who attained age 72 before 1968. Differences in past year total income and sum of individual column amounts are due to these payments. OASDI historical payments from the General Fund of the

Treasury may be found on the Internet at www.socialsecurity.gov/OACT/STATS/t4a3Income.html.

2 Beginning in 1983, includes transfers from the General Fund of the Treasury representing contributions that

would have been paid on deemed wage credits for military service in 1957 through 2001, if such credits were

considered to be covered wages.

3 Net interest includes net profits or losses on marketable investments. Beginning in 1967, administrative

expenses are charged to the trust funds on an estimated basis, with a final adjustment, including interest, made in

the following fiscal year. The amounts of these interest adjustments are included in net interest. For years prior to

1967, a description of the method of accounting for administrative expenses is contained in the 1970 Annual

Report. Beginning in October 1973, the figures shown include relatively small amounts of gifts to the funds. Net

interest for 1983-86 reflects payments from a borrowing trust fund to a lending trust fund for interest on amounts

owed under the interfund borrowing provisions. During 1983-90, interest paid from the trust funds to the general

fund on advance tax transfers is reflected. The amount shown for 1985 includes an interest adjustment of

$102.8 million on unnegotiated checks issued before April 1985.

4 Beginning in 1966, includes payments for vocational rehabilitation services furnished to disabled persons

receiving benefits because of their disabilities. Beginning in 1983, amounts are reduced by amount of reimbursement for unnegotiated benefit checks.

5 The “Trust fund ratio” column represents assets at the beginning of a year as a percentage of expenditures during the year. For years 1984-90, assets at the beginning of a year include January advance tax transfers.

6 Less than $50 million.

7 Reflects offset for repayment from the OASI Trust Fund of amounts borrowed from the HI Trust Fund in 1982.

The amount repaid in 1985 was $1.8 billion; in 1986, the amount was $10.6 billion.
Appendices

134

Note: Special issues are always purchased at par value. Therefore, book value and par value are the same for

each special issue, and the common value is shown above. Where the maturity years are grouped, the

amount maturing in each year is the amount shown divided by the number of years.

Table VI.A5.—Assets of the OASI Trust Fund, End of Calendar Years 2003 and 2004

[In thousands]

December 31, 2003 December 31, 2004

Obligations sold only to the trust funds (special issues): 

Certificates of indebtedness:

4.375 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . $61,977,287 —

4.375 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . — $71,489,553

4.5 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,165,122 —

4.625 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . — 9,452,489

Bonds:

3.5 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,513,752 —

3.5 percent, 2006 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,513,752 9,513,752

3.5 percent, 2007-15. . . . . . . . . . . . . . . . . . . . . . . . . . . 85,623,759 85,623,759

3.5 percent, 2016-17. . . . . . . . . . . . . . . . . . . . . . . . . . . 19,027,504 19,027,504

3.5 percent, 2018 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86,900,994 86,900,994

4.625 percent, 2006-07. . . . . . . . . . . . . . . . . . . . . . . . . — 18,335,324

4.625 percent, 2008-15. . . . . . . . . . . . . . . . . . . . . . . . . — 73,341,312

4.625 percent, 2016-18. . . . . . . . . . . . . . . . . . . . . . . . . — 27,502,989

4.625 percent, 2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . — 96,068,657

5.25 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,235,911 6,709,768

5.25 percent, 2006 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,235,911 9,235,911

5.25 percent, 2007-15. . . . . . . . . . . . . . . . . . . . . . . . . . 83,123,208 83,123,208

5.25 percent, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,235,911 9,235,911

5.25 percent, 2017 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77,387,242 77,387,242

5.625 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . 8,825,178 —

5.625 percent, 2005-11 . . . . . . . . . . . . . . . . . . . . . . . . . 67,350,066 67,350,066

5.625 percent, 2012-15. . . . . . . . . . . . . . . . . . . . . . . . . 38,485,748 38,485,748

5.625 percent, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . 68,151,331 68,151,331

5.875 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,169,273 —

5.875 percent, 2005-12. . . . . . . . . . . . . . . . . . . . . . . . . 49,354,184 49,354,184

5.875 percent, 2013 . . . . . . . . . . . . . . . . . . . . . . . . . . . 43,258,869 43,258,869

6 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,693,627 —

6 percent, 2005-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46,855,389 46,855,389

6 percent, 2012-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13,387,256 13,387,256

6 percent, 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49,952,497 49,952,497

6.25 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,150,975 —

6.25 percent, 2005-06. . . . . . . . . . . . . . . . . . . . . . . . . . 6,301,950 6,301,950

6.25 percent, 2007 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,150,974 3,150,974

6.25 percent, 2008 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23,350,034 23,350,034

6.5 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,008,650 —

6.5 percent, 2005-09. . . . . . . . . . . . . . . . . . . . . . . . . . . 55,043,250 55,043,250

6.5 percent, 2010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38,320,240 38,320,240

6.5 percent, 2011-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . 34,309,584 34,309,584

6.5 percent, 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58,529,893 58,529,893

6.875 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,975,271 —

6.875 percent, 2005-09. . . . . . . . . . . . . . . . . . . . . . . . . 19,876,355 19,876,355

6.875 percent, 2010-11 . . . . . . . . . . . . . . . . . . . . . . . . . 7,950,544 7,950,544

6.875 percent, 2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . 37,089,596 37,089,596

7 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,371,480 —

7 percent, 2005-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20,228,880 20,228,880

7 percent, 2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33,114,324 33,114,324

7.25 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,961,556 —

7.25 percent, 2005-06. . . . . . . . . . . . . . . . . . . . . . . . . . 7,923,112 7,923,112

7.25 percent, 2007-08. . . . . . . . . . . . . . . . . . . . . . . . . . 7,923,114 7,923,114

7.25 percent, 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27,311,591 27,311,591

7.375 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,575,474 —

7.375 percent, 2005-06. . . . . . . . . . . . . . . . . . . . . . . . . 7,150,948 7,150,948

7.375 percent, 2007 . . . . . . . . . . . . . . . . . . . . . . . . . . . 20,199,060 20,199,060

8.125 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,611,348 —

8.125 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,611,348 3,611,348

8.125 percent, 2006 . . . . . . . . . . . . . . . . . . . . . . . . . . . 16,623,586 16,623,586

8.75 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13,012,238 —

8.75 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13,012,238 13,012,238

Total investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,355,111,384 1,500,764,334

Undisbursed balances1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

1 Negative figure represents an extension of credit against securities to be redeemed within the following

few days.

218,920 -142,184

Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,355,330,304 1,500,622,150
135

History of Trust Fund Operations

Table VI.A6.—Assets of the DI Trust Fund, End of Calendar Years 2003 and 2004

[In thousands]

December 31, 2003 December 31, 2004

Investments in public-debt obligations:

Obligations sold only to the trust funds (special issues):

Certificates of indebtedness: 

4.375 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . $8,375,885 —

4.375 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . — $8,525,861

4.5 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . 356,350 —

Bonds: 

3.5 percent, 2005 1,115,128 —

3.5 percent, 2006-11 . . . . . . . . . . . . . . . . . . . . . . . . . 6,690,768 6,690,768

3.5 percent, 2012-15 . . . . . . . . . . . . . . . . . . . . . . . . . 4,460,508 4,460,508

3.5 percent, 2016-17 . . . . . . . . . . . . . . . . . . . . . . . . . 2,230,256 2,230,256

3.5 percent, 2018 . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,378,384 11,378,384

4.625 percent, 2006-08 . . . . . . . . . . . . . . . . . . . . . . . — 2,566,488

4.625 percent, 2009-11 . . . . . . . . . . . . . . . . . . . . . . . — 2,566,491

4.625 percent, 2012-15 . . . . . . . . . . . . . . . . . . . . . . . — 3,421,992

4.625 percent, 2016-18 . . . . . . . . . . . . . . . . . . . . . . . — 2,566,491

4.625 percent, 2019 . . . . . . . . . . . . . . . . . . . . . . . . . — 12,233,881

5.25 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . . 1,363,408 —

5.25 percent, 2006 . . . . . . . . . . . . . . . . . . . . . . . . . . 1,363,408 1,363,408

5.25 percent, 2007-11 . . . . . . . . . . . . . . . . . . . . . . . . 6,817,035 6,817,035

5.25 percent, 2012-16 . . . . . . . . . . . . . . . . . . . . . . . . 6,817,040 6,817,040

5.25 percent, 2017 . . . . . . . . . . . . . . . . . . . . . . . . . . 10,263,256 10,263,256

5.625 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . 1,524,967 —

5.625 percent, 2006 . . . . . . . . . . . . . . . . . . . . . . . . . 1,524,967 1,524,967

5.625 percent, 2007-13 . . . . . . . . . . . . . . . . . . . . . . . 10,674,776 10,674,776

5.625 percent, 2014-15 . . . . . . . . . . . . . . . . . . . . . . . 3,049,934 3,049,934

5.625 percent, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . 8,899,848 8,899,848

5.875 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . 733,731 —

5.875 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . 916,286 —

5.875 percent, 2006-12 . . . . . . . . . . . . . . . . . . . . . . . 6,414,002 6,414,002

5.875 percent, 2013 . . . . . . . . . . . . . . . . . . . . . . . . . 5,361,805 5,361,805

6 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 695,965 —

6 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 695,965 627,727

6 percent, 2006 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 695,965 695,965

6 percent, 2007-12 . . . . . . . . . . . . . . . . . . . . . . . . . . 4,175,796 4,175,796

6 percent, 2013 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 695,967 695,967

6 percent, 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,057,772 6,057,772

6.5 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,464,768 —

6.5 percent, 2005-06 . . . . . . . . . . . . . . . . . . . . . . . . . 6,929,536 6,929,536

6.5 percent, 2007 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,464,767 3,464,767

6.5 percent, 2008 . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,381,228 4,381,228

6.5 percent, 2009-13 . . . . . . . . . . . . . . . . . . . . . . . . . 6,585,540 6,585,540

6.5 percent, 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,317,109 1,317,109

6.5 percent, 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,374,881 7,374,881

6.875 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . 265,250 —

6.875 percent, 2005-07 . . . . . . . . . . . . . . . . . . . . . . . 795,750 795,750

6.875 percent, 2008-09 . . . . . . . . . . . . . . . . . . . . . . . 530,498 530,498

6.875 percent, 2010-12 . . . . . . . . . . . . . . . . . . . . . . . 13,336,560 13,336,560

7 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,116,151 —

7 percent, 2005-08 . . . . . . . . . . . . . . . . . . . . . . . . . . 4,464,604 4,464,604

7 percent, 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,180,271 4,180,271

7.375 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . 47,601 —

7.375 percent, 2005-06 . . . . . . . . . . . . . . . . . . . . . . . 95,202 95,202

7.375 percent, 2007 . . . . . . . . . . . . . . . . . . . . . . . . . 916,460 916,460

8.125 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . 150,161 —

8.125 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . 150,161 150,161

8.125 percent, 2006 . . . . . . . . . . . . . . . . . . . . . . . . . 868,859 868,859

8.75 percent, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . 718,698 —

8.75 percent, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . . 718,698 718,698

Total obligations sold only to the trust funds 

(special issues). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175,221,925 186,190,542
Appendices

136

Note: Special issues are always purchased at par value. Therefore, book value and par value are the same for

each special issue, and the common value is shown above. Where the maturity years are grouped for special

issues, the amount maturing in each year is the amount shown divided by the number of years.

Public issues: 

Treasury bond: 

11.75 percent, 2010. . . . . . . . . . . . . . . . . . . . . . . . . . $30,250 $30,250

Total investments in public issues at par value, as 

shown above . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30,250 30,250

Unamortized premium or discount, net . . . . . . . . . . . . -120 -106

Total investments in public issues at book value . . . . . 30,130 30,144

Total investments in public-debt obligations (book value1) 175,252,055 186,220,686

Undisbursed balances2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182,101 -3,381

Total assets (book value 1) . . . . . . . . . . . . . . . . . . . . . . . . . . 175,434,156 186,217,305

1 Par value, plus unamortized premium or less discount outstanding.

2 Negative figure represents an extension of credit against securities to be redeemed within the following few

days.

Table VI.A6.—Assets of the DI Trust Fund, End of Calendar Years 2003 and 2004 (Cont.)

[In thousands]

December 31, 2003 December 31, 2004
137

History of Actuarial Balances

B. HISTORY OF ACTUARIAL BALANCE ESTIMATES

This appendix chronicles the history of the principal summary measure of

long-range actuarial status, namely the actuarial balance, since 1983. The

1983 report was the last report for which the actuarial balance was positive.

Actuarial balance is defined in detail in section IV.B.4 Summarized Income

Rates, Cost Rates, and Balances. Conceptually, the two basic components of

actuarial balance are the summarized income rate and the summarized cost

rate. Both rates are expressed as percentages of taxable payroll. For any

given period, the actuarial balance is the difference between the present

value of tax income for the period, and the present value of the cost for the

period, each divided by the present value of taxable payroll for all years in

the period. Also included in the calculation of the actuarial balance are:

 • The amount of the trust fund balances on hand at the beginning of the

valuation period, as shown in the reports for 1988 and later, and

 • The present value of a target trust fund balance equal to 100 percent of

the amount of annual cost to be reached and maintained by the end of

the valuation period, as shown in the reports for 1991 and later.

It should be noted that the current method of calculating the actuarial balance

based on present values, though used prior to the 1973 Annual Report, was

not used for the annual reports of 1973-87. Instead, a simpler method that

approximates the results of the present-value approach, called the averagecost method, was used during that period. Under the average-cost method,

the sum of the annual cost rates (which are expressed as percentages of taxable payroll) over the 75-year projection period was divided by the total

number of years, 75, to obtain the average cost rate per year. The average

income rate was similarly calculated, and the difference between the average

income rate and the average cost rate was called the actuarial balance.

In 1973, when the average-cost method was first used, the long-range financing of the program was more nearly on a pay-as-you-go basis. Also, based on

the long-range demographic and economic assumptions then being used, the

annual rate of growth in taxable payroll was about the same as the annual

rate at which the trust funds earned interest. In either situation (i.e., pay-asyou-go financing, where the annual income rate is the same as the annual

cost rate, or an annual rate of growth in taxable payroll equal to the annual

interest rate), the average-cost method produces the same result as the

present-value method. However, by 1988, neither of these situations still

existed.
Appendices

138

As a result of legislation enacted in 1977 and in 1983, substantial increases

in the trust funds were estimated to occur well into the 21st century, so that

the program was partially advance funded, rather than being funded on a

pay-as-you-go basis. Also, because of reductions in long-range fertility rates

and average real-wage growth that were assumed in the annual reports over

the period 1973-87, the annual rate of growth in taxable earnings assumed

for the long range became significantly lower than the assumed interest rate.

Therefore, during the period 1973-87, the results of the average-cost method

and the present-value method began to diverge, and by 1988 they were quite

different. While the average-cost method still accounted for most of the

effects of the assumed interest rate, it no longer accounted for all of the interest effects. The present-value method, of course, does account for the full

effect of the assumed interest rates. So, in 1988, the present-value method of

calculating the actuarial balance was reintroduced.

A positive actuarial balance indicates that estimated income is more than sufficient to meet estimated trust fund obligations for the period as a whole. A

negative actuarial balance indicates that estimated income is insufficient to

meet estimated trust fund obligations for the entire period. An actuarial balance of zero indicates that the estimated income exactly matches estimated

trust fund obligations for the period.

Table VI.B1 shows the estimated OASDI actuarial balances, as well as the

summarized income and cost rates, for the annual reports 1983-2004, along

with the estimates for the current report. The values shown are based on the

alternative II assumptions, or alternative II-B for years prior to 1991.
139

History of Actuarial Balances

Note: Totals do not necessarily equal the sums of rounded components.

For several of the years included in the table, significant legislative changes

or definitional changes affected the estimated actuarial balance. The Social

Security Amendments of 1983 accounted for the largest single change in

recent history. The actuarial balance of -1.82 for the 1982 report improved to

+0.02 for the 1983 report. In 1985, the estimated actuarial balance changed

largely because of an adjustment made to the method for estimating the age

distribution of immigrants.

Rebenchmarking of the National Income and Product Accounts and changes

in demographic assumptions contributed to the change in the actuarial balance for 1987. Various changes in assumptions and methods for the 1988

report had roughly offsetting effects on the actuarial balance. In 1989 and

1990, changes in economic assumptions accounted for most of the changes

in the estimated actuarial balance. 

Table VI.B1.—Long-Range OASDI Actuarial Balances 1 as Shown 

in the Trustees Reports for 1982-2005

[As a percentage of taxable payroll]

1 Values shown are based on the alternative II assumptions for 1991-2005, and on the alternative II-B

assumptions for 1982-90.

Year of report

Summarized

income rate

Summarized

cost rate

Actuarial

balance

Change from

previous year

1982 . . . . . . . . . . . . . . . . . . . . . . . . . . 12.27 14.09 -1.82 2/1

1983 . . . . . . . . . . . . . . . . . . . . . . . . . . 12.87 12.84 +.02 +1.84

1984 . . . . . . . . . . . . . . . . . . . . . . . . . . 12.90 12.95 -.06 -.08

1985 . . . . . . . . . . . . . . . . . . . . . . . . . . 12.94 13.35 -.41 -.35

1986 . . . . . . . . . . . . . . . . . . . . . . . . . . 12.96 13.40 -.44 -.03

1987 . . . . . . . . . . . . . . . . . . . . . . . . . . 12.89 13.51 -.62 -.18

1988 . . . . . . . . . . . . . . . . . . . . . . . . . . 12.94 13.52 -.58 +.04

1989 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.02 13.72 -.70 -.13

1990 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.04 13.95 -.91 -.21

1991 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.11 14.19 -1.08 -.17

1992 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.16 14.63 -1.46 -.38

1993 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.21 14.67 -1.46 2/

2 Between -0.005 and 0.005 percent of taxable payroll.

1994 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.24 15.37 -2.13 -.66

1995 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.27 15.44 -2.17 -.04

1996 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.33 15.52 -2.19 -.02

1997 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.37 15.60 -2.23 -.03

1998 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.45 15.64 -2.19 +.04

1999 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.49 15.56 -2.07 +.12

2000 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.51 15.40 -1.89 +.17

2001 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.58 15.44 -1.86 +.03

2002 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.72 15.59 -1.87 -.01

2003 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.78 15.70 -1.92 -.04

2004 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.84 15.73 -1.89 +.03

2005 . . . . . . . . . . . . . . . . . . . . . . . . . . 13.87 15.79 -1.92 -.04
Appendices

140

In 1991, the effect of legislation, changes in economic assumptions, and the

introduction of the cost of reaching and maintaining an ending trust fund target combined to produce the change in the actuarial balance. In 1992,

changes in disability assumptions and the method for projecting average benefit levels accounted for most of the change in the actuarial balance. In 1993,

numerous small changes in assumptions and methods had offsetting effects

on the actuarial balance. In 1994, changes in the real-wage assumptions, disability rates, and the earnings sample used for projecting average benefit levels accounted for most of the change in the actuarial balance. In 1995,

numerous small changes had largely offsetting effects on the actuarial balance, including a substantial reallocation of the payroll tax rate, which

reduced the OASI actuarial balance, but increased the DI actuarial balance.

In 1996, a change in the method of projecting dually-entitled beneficiaries

produced a large increase in the actuarial balance, which almost totally offset

decreases produced by changes in the valuation period and in the demographic and economic assumptions. Various changes in assumptions and

methods for the 1997 report had roughly offsetting effects on the actuarial

balance. In 1998, increases caused by changes in the economic assumptions,

although partially offset by decreases produced by changes in the valuation

period and in the demographic assumptions, accounted for most of the

changes in the estimated actuarial balance. In 1999, increases caused by

changes in the economic assumptions (related to improvements in the CPI by

the Bureau of Labor Statistics) accounted for most of the changes in the estimated actuarial balance. For the 2000 report, changes in the actuarial balance

resulted from changes in economic assumptions and methodology; however,

these increases in the balance were partially offset by reductions caused by

the change in valuation period and changes in demographic assumptions.

For the 2001 report, increases caused by changes in the demographic starting

values, although partially offset by a decrease produced by the change in the

valuation period, accounted for most of the changes in the estimated actuarial

balance. For the 2002 report, the changes in the valuation period and the

demographic assumptions—both decreases in the actuarial balance—were

offset by changes in the economic assumptions, while the increase due to disability assumptions was slightly more than offset by the decrease due to

changes in the projection methods and data. For the 2003 report, the increase

due to the change in program assumptions was more than offset by decreases

due to the change in valuation period and changes in demographic assumptions. For the 2004 report, increases due to changing the method of projecting benefit levels for higher earners more than offset decreases in the
141

History of Actuarial Balances

actuarial balance arising from the change in the valuation period and the net

effect of other changes in programmatic data and methods.

Changes affecting the actuarial balance shown for the 2005 report are

described in section IV.B.7 Reasons for Change in Actuarial Balance From

Last Report.
Appendices

142

C. FISCAL YEAR HISTORICAL DATA AND 

PROJECTIONS THROUGH 2014

Tables VI.C1, VI.C2, and VI.C3 present detailed operations of the OASI, DI,

and the combined OASI and DI Trust Funds, respectively, for fiscal

year 2004, the most recent fiscal year for which complete actual information

is available. These tables are similar to the calendar year operations tables in

section III.A. Please see that section for a description of the various items of

income and outgo.

Note: Totals do not necessarily equal the sums of rounded components.

Table VI.C1.—Operations of the OASI Trust Fund, Fiscal Year 2004

[In millions]

Total assets, September 30, 2003 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $1,313,080

Receipts:

Contributions:

Employment taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $467,016

Payments from the General Fund of the Treasury for:

Contributions subject to refund . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -834

Employee-employer contributions on deemed wage credits for

military service as specified by P.L. 108-203 . . . . . . . . . . . . . . . . . . . . . . . . . 625

Net contributions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 466,807

Income based on taxation of benefit payments:

Withheld from benefit payments to nonresident aliens . . . . . . . . . . . . . . . . . . . . . . 148

All other, not subject to withholding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13,121

Total income from taxation of benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13,269

Reimbursement from the general fund for costs of payments to uninsured persons who attained age 72 before 1968 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Investment income and interest adjustments:

Interest on investments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76,441

Interest adjustments1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

1 Includes (1) interest on transfers between the trust fund and the general fund account for the Supplemental

Security Income program due to adjustments in the allocation of administrative expenses, (2) interest arising

from the revised allocation of administrative expenses among the trust funds and (3) interest on reimbursements to the trust fund for costs associated with union activities and pension reform.

6

Total investment income and interest adjustments. . . . . . . . . . . . . . . . . . . . . . . . 76,446

Gifts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2/

2 Less than $500,000.

Total receipts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556,523

Disbursements:

Benefit payments:

Gross benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412,151

Offset for collected overpayments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -953

Reimbursement from the general fund for unnegotiated checks . . . . . . . . . . . . . . . -50

Net benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411,148

Transfer to the Railroad Retirement “Social Security Equivalent Benefit Account” . . 3,628

Payment for costs of vocational rehabilitation services for disabled beneficiaries . . . 3

Administrative expenses:

Costs incurred by:

Social Security Administration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,992

Department of the Treasury . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296

Offsetting receipts from sales of supplies, materials, etc. . . . . . . . . . . . . . . . . . . . . -1

Miscellaneous reimbursements from the general fund 3 . . . . . . . . . . . . . . . . . . . . . 

3 Reimbursements for costs incurred in performing certain legislatively mandated activities not directly

related to administering the OASI program.

-13

Net administrative expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,274

Total disbursements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417,053

Net increase in assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139,470

Total assets, September 30, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,452,550
143

Fiscal Year Operations and Projections

Note: Totals do not necessarily equal the sums of rounded components.

Table VI.C2.—Operations of the DI Trust Fund, Fiscal Year 2004

[In millions]

Total assets, September 30, 2003 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $171,260

Receipts:

Contributions:

Employment taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $79,309

Payments from the General Fund of the Treasury for:

Contributions subject to refund . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -145

Employee-employer contributions on deemed wage credits for

military service as specified by P.L. 108-203 . . . . . . . . . . . . . . . . . . . . . . . . . 105

Net contributions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79,269

Income based on taxation of benefit payments:

Withheld from benefit payments to nonresident aliens . . . . . . . . . . . . . . . . . . . . . . 5

All other, not subject to withholding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,042

Total income from taxation of benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,047

Investment income and interest adjustments:

Interest on investments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,786

Interest adjustments1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Includes (1) interest on transfers between the trust fund and the general fund account for the Supplemental

Security Income program due to adjustments in the allocation of administrative expenses, (2) interest arising

from the revised allocation of administrative expenses among the trust funds, and (3) interest on reimbursements to the trust fund for costs associated with union activities and pension reform.

2

Total investment income and interest adjustments. . . . . . . . . . . . . . . . . . . . . . . . 9,789

Total receipts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90,105

Disbursements:

Benefit payments:

Gross benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76,645

Offset for collected overpayments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -484

Reimbursement from the general fund for unnegotiated checks . . . . . . . . . . . . . . . -22

Net benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76,139

Transfer to the Railroad Retirement “Social Security Equivalent Benefit Account” . . 215

Payment for costs of vocational rehabilitation services for disabled beneficiaries . . . 47

Administrative expenses:

Costs incurred by:

Social Security Administration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,019

Department of the Treasury . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Miscellaneous reimbursements from the general fund2. . . . . . . . . . . . . . . . . . . . . .

2 Reimbursements for costs incurred in performing certain legislatively mandated activities not directly

related to administering the DI program.

-2

Net administrative expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,070

Total disbursements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78,471

Net increase in assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,634

Total assets, September 30, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182,893
Appendices

144

Note: Totals do not necessarily equal the sums of rounded components.

Estimates of the operations and status of the OASI, DI and the combined

OASI and DI Trust Funds during fiscal years (12 months ending on

September 30) 2000-14 are presented in tables VI.C4, VI.C5 and VI.C6,

respectively. 

Table VI.C3.—Operations of the Combined OASI and DI Trust Funds, Fiscal Year 2004

[In millions]

Total assets, September 30, 2003 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $1,484,340

Receipts:

Contributions:

Employment taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $546,325

Payments from the General Fund of the Treasury for:

Contributions subject to refund . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -980

Employee-employer contributions on deemed wage credits for

military service as specified by P.L. 108-203 . . . . . . . . . . . . . . . . . . . . . . . . . 730

Net contributions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 546,076

Income based on taxation of benefit payments:

Withheld from benefit payments to nonresident aliens . . . . . . . . . . . . . . . . . . . . . . 153

All other, not subject to withholding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,163

Total income from taxation of benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,316

Reimbursement from the general fund for costs of payments to uninsured persons who attained age 72 before 1968 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Investment income and interest adjustments:

Interest on investments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86,227

Interest adjustments1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Includes (1) interest on transfers between the trust funds and the general fund account for the Supplemental

Security Income program due to adjustments in the allocation of administrative expenses, (2) interest arising

from the revised allocation of administrative expenses among the trust funds, and (3) interest on reimbursements to the trust fund for costs associated with union activities and pension reform.

8

Total investment income and interest adjustments. . . . . . . . . . . . . . . . . . . . . . . . 86,235

Gifts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2/

2 Less than $500,000.

Total receipts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 646,628

Disbursements:

Benefit payments:

Gross benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 488,796

Offset for collected overpayments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1,437

Reimbursement from the general fund for unnegotiated checks . . . . . . . . . . . . . . . -72

Net benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 487,287

Transfer to the Railroad Retirement “Social Security Equivalent Benefit Account” . . 3,844

Payment for costs of vocational rehabilitation services for disabled beneficiaries . . . 50

Administrative expenses:

Costs incurred by:

Social Security Administration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,011

Department of the Treasury . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349

Offsetting receipts from sales of supplies, materials, etc. . . . . . . . . . . . . . . . . . . . . -1

Miscellaneous reimbursements from the general fund3 . . . . . . . . . . . . . . . . . . . . . .

3 Reimbursements for costs incurred in performing certain legislatively mandated activities not directly

related to administering the OASI and DI programs.

-15

Net administrative expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,344

Total disbursements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495,525

Net increase in assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151,103

Total assets, September 30, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,635,443
145

Fiscal Year Operations and Projections

Note: Totals do not necessarily equal the sums of rounded components.

Table VI.C4.—Operations of the OASI Trust Fund in Fiscal Years 2000-14

[Amounts in billions]

Fiscal 

year

Income Cost Assets

Total1

1 “Total Income” column includes transfers made between the OASI Trust Fund and the General Fund of the

Treasury that are not included in the separate components of income shown. These transfers consist of payments for (1) the cost of noncontributory wage credits for military service before 1957, and (2) the cost of

benefits to certain uninsured persons who attained age 72 before 1968. In February 2002, $414 million was

transferred from the General Fund of the Treasury to the OASI Trust Fund for the cost of pre-1957 military

service wage credits. Such transfers are estimated to be less than $500,000 in each year of the projection

period.

Net

contributions

Taxation of

benefits

Net

interest Total

Benefit

payments

Administrative

costs

RRB

interchange

Net

increase

during

year

Amount

at end

of year

Trust

fund

ratio2

2 The “Trust fund ratio” column represents assets at the beginning of a year (which are identical to assets at

the end of the prior year shown in the “Amount at end of year” column) as a percentage of cost for the year. 

Historical data:

2000 . . $484.2 $418.2 $12.5 $53.5 $353.4 $347.9 $2.0 $3.5 $130.8 $893.0 216

2001 . . 513.8 440.8 11.8 61.2 373.0 367.7 2.1 3.3 140.8 1,033.8 239

2002 . . 529.3 448.1 12.6 68.1 389.5 383.9 2.1 3.5 139.7 1,173.6 265

2003 . . 542.3 456.0 12.3 74.0 402.8 396.7 2.5 3.6 139.5 1,313.1 291

2004 . . 556.5 466.8 13.3 76.4 417.1 411.2 2.3 3.6 139.5 1,452.6 315

Intermediate:

2005 . . 590.3 493.4 15.4 81.6 435.6 429.1 2.9 3.5 154.7 1,607.3 333

2006 . . 624.0 522.8 14.8 86.4 452.2 445.7 3.1 3.5 171.7 1,779.0 355

2007 . . 660.2 548.9 16.2 95.0 471.4 464.7 3.0 3.7 188.8 1,967.8 377

2008 . . 699.8 575.5 18.8 105.5 494.9 488.3 2.9 3.7 204.9 2,172.7 398

2009 . . 739.9 602.8 19.7 117.5 523.0 516.4 2.9 3.7 217.0 2,389.7 415

2010 . . 786.5 635.3 21.3 129.9 555.4 548.7 2.9 3.8 231.1 2,620.7 430

2011 . . 836.0 667.4 24.8 143.8 591.8 585.2 3.0 3.7 244.2 2,864.9 443

2012 . . 882.6 696.4 28.1 158.1 632.4 625.5 3.0 3.9 250.1 3,115.0 453

2013 . . 931.5 727.5 31.2 172.8 677.4 670.3 3.1 4.1 254.1 3,369.1 460

2014 . . 980.9 759.0 33.8 188.1 726.3 718.9 3.1 4.2 254.6 3,623.7 464

Low Cost:

2005 . . 590.5 493.5 15.4 81.6 435.4 428.9 2.9 3.5 155.1 1,607.6 334

2006 . . 624.6 523.5 14.7 86.3 451.0 444.4 3.1 3.5 173.6 1,781.2 356

2007 . . 659.4 549.2 16.1 94.1 468.0 461.3 3.0 3.7 191.4 1,972.6 381

2008 . . 698.2 576.1 18.5 103.6 487.1 480.5 2.9 3.6 211.1 2,183.7 405

2009 . . 736.8 603.3 19.2 114.4 509.5 502.9 2.9 3.6 227.3 2,411.0 429

2010 . . 782.3 635.6 20.5 126.1 535.7 529.1 2.9 3.6 246.6 2,657.7 450

2011 . . 830.7 667.3 23.7 139.7 565.2 558.8 2.9 3.5 265.5 2,923.2 470

2012 . . 875.9 695.4 26.5 154.0 598.3 591.6 2.9 3.7 277.6 3,200.9 489

2013 . . 923.8 724.8 29.2 169.7 635.0 628.3 3.0 3.8 288.7 3,489.6 504

2014 . . 971.7 754.0 31.4 186.2 675.0 668.1 3.0 3.9 296.7 3,786.3 517

High Cost:

2005 . . 587.0 490.2 15.4 81.4 435.7 429.2 2.9 3.5 151.3 1,603.9 333

2006 . . 602.6 504.0 14.9 83.8 454.6 448.1 3.1 3.5 148.0 1,751.9 353

2007 . . 646.4 536.1 16.4 93.9 476.3 469.6 3.0 3.7 170.0 1,922.0 368

2008 . . 683.3 560.4 19.1 103.9 501.7 495.1 2.9 3.7 181.6 2,103.5 383

2009 . . 721.6 585.7 20.2 115.7 537.7 531.0 3.0 3.8 183.9 2,287.4 391

2010 . . 798.2 637.3 22.5 138.4 585.9 578.9 3.1 3.9 212.3 2,499.7 390

2011 . . 867.0 680.0 26.9 160.1 640.4 633.3 3.2 4.0 226.6 2,726.3 390

2012 . . 921.2 714.7 30.9 175.5 696.8 689.1 3.2 4.4 224.4 2,950.7 391

2013 . . 973.5 750.6 34.7 188.2 753.8 745.8 3.3 4.7 219.8 3,170.4 391

2014 . . 1,025.4 786.2 37.9 201.3 814.4 806.1 3.4 5.0 211.0 3,381.4 389
Appendices

146

Note: Totals do not necessarily equal the sums of rounded components.

Table VI.C5.—Operations of the DI Trust Fund in Fiscal Years 2000-14

[Amounts in billions]

Fiscal 

year

Income Cost Assets

Total1

1 “Total Income” column includes transfers made between the DI Trust Fund and the General Fund of the

Treasury that are not included in the separate components of income shown. These transfers consist of payments for the cost of noncontributory wage credits for military service before 1957. In particular, a transfer

was made in December 2000 in the amount of $836 million from the DI Trust Fund to the General Fund of

the Treasury. Such transfers are estimated to be less than $500,000 in each year of the projection period.

Net

contributions

Taxation of

benefits

Net

interest Total

Benefit

payments

Administrative

costs

RRB

interchange

Net

increase

during

year

Amount

at end

of year

Trust

fund

ratio2

2 The “Trust fund ratio” column represents assets at the beginning of a year (which are identical to assets at

the end of the prior year shown in the “Amount at end of year” column) as a percentage of cost for the year. 

Historical data:

2000 . . $77.0 $70.0 $0.8 $6.3 $56.0 $54.2 $1.6 $0.2 $21.0 $113.8 166

2001 . . 82.1 74.6 .7 7.6 59.9 58.2 1.8 3/

3 Less than $50 million.

22.1 135.9 190

2002 . . 85.7 76.1 .9 8.7 66.4 64.2 2.0 .2 19.4 155.3 205

2003 . . 87.9 77.4 .9 9.6 71.9 69.8 2.0 .2 16.0 171.3 216

2004 . . 90.1 79.3 1.0 9.8 78.5 76.2 2.1 .2 11.6 182.9 218

Intermediate:

2005 . . 95.1 83.8 1.2 10.1 85.1 82.5 2.3 .3 9.9 192.8 215

2006 . . 100.3 88.8 1.2 10.3 90.4 87.7 2.4 .3 9.9 202.7 213

2007 . . 105.3 93.2 1.3 10.8 96.0 93.4 2.3 .3 9.3 212.0 211

2008 . . 110.6 97.7 1.6 11.3 102.5 99.6 2.5 .4 8.1 220.1 207

2009 . . 115.8 102.4 1.7 11.7 110.6 107.6 2.6 .4 5.1 225.2 199

2010 . . 121.7 107.9 1.9 11.9 116.9 113.7 2.8 .4 4.8 230.0 193

2011 . . 127.8 113.3 2.2 12.2 122.8 119.4 2.9 .4 5.0 235.0 187

2012 . . 133.3 118.3 2.6 12.5 130.4 126.8 3.1 .5 3.0 237.9 180

2013 . . 139.1 123.5 2.9 12.7 137.8 134.1 3.3 .5 1.3 239.2 173

2014 . . 144.8 128.9 3.2 12.8 145.4 141.5 3.5 .5 -.6 238.6 164

Low Cost:

2005 . . 95.1 83.8 1.2 10.1 84.2 81.6 2.3 .3 10.9 193.8 217

2006 . . 100.4 88.9 1.2 10.4 88.1 85.5 2.4 .3 12.3 206.1 220

2007 . . 105.4 93.3 1.3 10.9 92.4 89.7 2.3 .3 13.0 219.1 223

2008 . . 110.9 97.8 1.5 11.5 96.9 94.1 2.5 .4 13.9 233.0 226

2009 . . 116.2 102.4 1.6 12.2 102.7 99.7 2.6 .4 13.5 246.5 227

2010 . . 122.5 107.9 1.7 12.8 106.6 103.5 2.7 .4 15.9 262.4 231

2011 . . 129.0 113.3 2.0 13.7 110.0 106.7 2.9 .4 19.0 281.4 238

2012 . . 135.1 118.1 2.3 14.7 114.6 111.2 3.0 .4 20.4 301.8 245

2013 . . 141.5 123.1 2.5 15.9 118.9 115.3 3.2 .4 22.5 324.3 254

2014 . . 147.9 128.0 2.7 17.2 123.1 119.4 3.4 .4 24.7 349.0 263

High Cost:

2005 . . 94.5 83.2 1.2 10.1 87.0 84.4 2.3 .3 7.5 190.4 210

2006 . . 96.7 85.6 1.3 9.9 95.5 92.8 2.4 .3 1.2 191.6 199

2007 . . 102.5 91.0 1.5 10.0 104.2 101.6 2.3 .3 -1.8 189.9 184

2008 . . 106.7 95.2 1.8 9.8 113.6 110.8 2.5 .4 -6.9 183.0 167

2009 . . 110.8 99.5 2.0 9.3 126.3 123.2 2.7 .4 -15.5 167.5 145

2010 . . 119.1 108.2 2.3 8.6 138.3 135.0 2.9 .4 -19.2 148.3 121

2011 . . 125.7 115.5 2.7 7.4 149.8 146.2 3.1 .5 -24.1 124.1 99

2012 . . 130.6 121.4 3.2 6.0 162.3 158.4 3.3 .5 -31.6 92.5 76

2013 . . 135.5 127.5 3.7 4.4 173.5 169.4 3.5 .5 -37.9 54.6 53

2014 . . 140.3 133.5 4.0 2.8 184.6 180.4 3.7 .5 -44.3 10.2 30
147

Fiscal Year Operations and Projections

Note: Totals do not necessarily equal the sums of rounded components.

Table VI.C6.—Operations of the Combined OASI and DI Trust Funds

in Fiscal Years 2000-14

[Amounts in billions]

Fiscal 

year

Income Cost Assets

Total1

1 “Total Income” column includes transfers made between the OASI and DI Trust Funds and the General

Fund of the Treasury that are not included in the separate components of income shown. These transfers consist of payments for (1) the cost of noncontributory wage credits for military service before 1957, and (2) the

cost of benefits to certain uninsured persons who attained age 72 before 1968. Such transfers are estimated to

be less than $500,000 in each year of the projection period.

Net

contributions

Taxation of

benefits

Net

interest Total

Benefit

payments

Administrative

costs

RRB

interchange

Net

increase

during

year

Amount

at end

of year

Trust

fund

ratio2

2 The “Trust fund ratio” column represents assets at the beginning of a year (which are identical to assets at

the end of the prior year shown in the “Amount at end of year” column) as a percentage of cost for the year. 

Historical data:

2000 $561.3 $488.2 $13.2 $59.8 $409.4 $402.1 $3.6 $3.7 $151.8 $1,006.8 209

2001 595.9 515.4 12.5 68.8 432.9 425.8 3.8 3.3 163.0 1,169.7 233

2002 615.0 524.2 13.5 76.8 455.9 448.1 4.1 3.6 159.1 1,328.8 257

2003 630.3 533.4 13.3 83.5 474.7 466.5 4.5 3.7 155.5 1,484.3 280

2004 646.6 546.1 14.3 86.2 495.5 487.3 4.3 3.8 151.1 1,635.4 300

Intermediate:

2005 685.4 577.1 16.6 91.7 520.7 511.6 5.3 3.8 164.7 1,800.1 314

2006 724.2 611.5 16.0 96.7 542.6 533.4 5.4 3.8 181.6 1,981.7 332

2007 765.5 642.2 17.6 105.8 567.4 558.1 5.3 4.0 198.1 2,179.8 349

2008 810.4 673.2 20.4 116.8 597.4 588.0 5.4 4.0 213.0 2,392.8 365

2009 855.7 705.1 21.4 129.2 633.6 624.0 5.5 4.1 222.1 2,614.9 378

2010 908.2 743.2 23.2 141.8 672.4 662.5 5.7 4.2 235.9 2,850.7 389

2011 963.8 780.7 27.1 156.0 714.7 704.6 5.9 4.1 249.1 3,099.9 399

2012 1,015.9 814.6 30.6 170.6 762.8 752.3 6.1 4.4 253.1 3,353.0 406

2013 1,070.6 851.1 34.1 185.5 815.3 804.4 6.4 4.5 255.4 3,608.3 411

2014 1,125.7 887.9 37.0 200.9 871.7 860.5 6.6 4.7 254.0 3,862.3 414

Low Cost:

2005 685.6 577.3 16.6 91.7 519.6 510.5 5.3 3.8 166.0 1,801.4 315

2006 725.0 612.4 15.9 96.7 539.1 529.9 5.4 3.8 185.9 1,987.3 334

2007 764.8 642.4 17.4 105.0 560.4 551.0 5.3 4.0 204.4 2,191.7 355

2008 809.0 673.9 20.0 115.1 584.0 574.6 5.4 4.0 225.0 2,416.7 375

2009 853.0 705.7 20.8 126.5 612.2 602.7 5.5 4.0 240.8 2,657.5 395

2010 904.8 743.5 22.3 139.0 642.3 632.6 5.6 4.0 262.5 2,920.1 414

2011 959.7 780.6 25.7 153.4 675.2 665.5 5.8 3.9 284.5 3,204.6 432

2012 1,011.0 813.5 28.8 168.7 712.9 702.8 6.0 4.1 298.1 3,502.6 450

2013 1,065.2 847.9 31.7 185.6 754.0 743.6 6.2 4.2 311.3 3,813.9 465

2014 1,119.5 882.1 34.1 203.4 798.1 787.5 6.4 4.3 321.4 4,135.3 478

High Cost:

2005 681.6 573.4 16.6 91.5 522.7 513.7 5.3 3.8 158.9 1,794.3 313

2006 699.4 589.5 16.1 93.7 550.1 540.9 5.4 3.8 149.2 1,943.5 326

2007 748.9 627.1 17.9 103.9 580.6 571.2 5.3 4.1 168.3 2,111.8 335

2008 790.1 655.5 20.8 113.7 615.3 605.9 5.4 4.1 174.7 2,286.5 343

2009 832.4 685.1 22.2 125.0 664.0 654.2 5.6 4.2 168.4 2,454.9 344

2010 917.2 745.6 24.8 146.9 724.2 713.9 6.0 4.3 193.0 2,648.0 339

2011 992.6 795.5 29.6 167.5 790.2 779.5 6.3 4.5 202.4 2,850.4 335

2012 1,051.8 836.1 34.2 181.6 859.0 847.5 6.5 4.9 192.8 3,043.2 332

2013 1,109.1 878.1 38.4 192.6 927.2 915.2 6.8 5.2 181.8 3,225.0 328

2014 1,165.7 919.7 41.9 204.0 999.0 986.5 7.1 5.5 166.7 3,391.7 323
Appendices

148

D. LONG-RANGE SENSITIVITY ANALYSIS

This appendix presents estimates which illustrate the sensitivity of the longrange actuarial status of the OASDI program to changes in selected individual assumptions. The estimates based on the three alternative sets of assumptions (see sections IV.B, V.A, V.B, and V.C) illustrate the effects of varying

all of the principal assumptions simultaneously in order to portray a generally more optimistic or pessimistic future, in terms of the financial status of

the OASDI program. In the sensitivity analysis presented in this appendix,

the intermediate alternative II projection is used as the reference point, and

one assumption at a time is varied within that alternative. The variation used

for each individual assumption reflects the levels used for that assumption in

the low cost alternative I and high cost alternative III projections. Similar

variations in the selected assumptions within the other alternatives would

result in similar relative variations in the long-range estimates.

Each table in this section shows the effects of changing a particular assumption on the OASDI summarized income rates, summarized cost rates, and

actuarial balances for 25-year, 50-year, and 75-year valuation periods.

Because the annual payroll tax rate is constant for the entire 75-year valuation period, the income rate varies only slightly with changes in assumptions

and, therefore, is not considered in the discussion of the tables. The change

in each of the actuarial balances is approximately equal to the change in the

corresponding cost rate, but in the opposite direction.

1. Total Fertility Rate

Table VI.D1 shows the estimated OASDI income rates, cost rates, and actuarial balances, on the basis of alternative II with various assumptions about

the ultimate total fertility rate. These assumptions are that the ultimate total

fertility rate will be 1.7, 1.95, and 2.2 children per woman as assumed for

alternatives III, II, and I, respectively. The rate is assumed to change gradually from its current level and to reach the various ultimate values in 2029.
149

Long-Range Sensitivity Analysis

For the 25-year period, the cost rate for the three fertility assumptions varies

by only about 0.05 percent of taxable payroll. In contrast, the 75-year cost

rate varies over a wide range, decreasing from 16.12 to 15.48 percent, as the

assumed ultimate total fertility rate increases from 1.7 to 2.2. Similarly,

while the 25-year actuarial balance varies by only 0.04 percent of taxable

payroll, the 75-year actuarial balance varies over a much wider range, from

-2.22 to -1.64 percent.

During the 25-year period, the very slight increases in the working population resulting from increases in fertility are more than offset by decreases in

the female labor force and increases in the number of child beneficiaries.

Hence, the program cost slightly increases with higher fertility. For the

75-year long-range period, however, changes in fertility have a relatively

greater impact on the labor force than on the beneficiary population. As a

result, an increase in fertility significantly reduces the cost rate. Each

increase of 0.1 in the ultimate total fertility rate increases the long-range

actuarial balance by about 0.11 percent of taxable payroll.

2. Death Rates

Table VI.D2 shows the estimated OASDI income rates, cost rates, and actuarial balances, on the basis of alternative II with various assumptions about

future reductions in death rates for the period 2004-79. These assumptions

Table VI.D1.—Sensitivity to Varying Fertility Assumptions

[As a percentage of taxable payroll]

Valuation period

Ultimate total fertility rate1,2

1The total fertility rate for any year is the average number of children who would be born to a woman in her

lifetime if she were to experience the birth rates by age observed in, or assumed for, the selected year, and if

she were to survive the entire childbearing period. The ultimate total fertility rate is assumed to be reached in

2029.

2 Ultimate total fertility rates used for this analysis are 1.7 from the alternative III assumptions, 1.95 from the

alternative II assumptions, and 2.2 from the alternative I assumptions. All other assumptions used for this

analysis are from alternative II.

1.7 1.95 2.2

Summarized income rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.55 14.55 14.55

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.03 14.02 14.01

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.90 13.87 13.84

Summarized cost rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.70 13.72 13.75

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.23 15.15 15.07

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.12 15.79 15.48

Actuarial balance:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +.85 +.83 +.81

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.21 -1.13 -1.06

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2.22 -1.92 -1.64

Year of combined trust fund exhaustion . . . . . . . . . . . . . 2041 2041 2041
Appendices

150

are the same as those used for alternatives I, II, and III, which are described

in section V.A.2. The age-sex-adjusted death rates decline at average annual

rates of 0.30 percent, 0.72 percent, and 1.27 percent for alternatives I, II, and

III, respectively. It should be noted that these reductions do not apply uniformly to all ages, as some variation by age was assumed consistent with the

objective of selecting assumptions for alternatives I and III that are relatively

more optimistic and more pessimistic, respectively, in terms of the financing

of the OASDI program.

The variation in cost for the 25-year period is less pronounced than the variation for the 75-year period because the decreases in death rates are assumed

to occur gradually. The 25-year cost rate increases from 13.57 percent (for an

average annual death-rate reduction of 0.30 percent) to 13.88 percent (for an

average annual death-rate reduction of 1.27 percent). The 75-year cost rate

increases from 15.17 to 16.52 percent. The actuarial balance decreases from

+0.98 to +0.67 percent for the 25-year period, and from -1.33 to -2.63 percent for the 75-year period.

Lower death rates cause both the income (as well as taxable payroll) and the

cost of the OASDI program to be higher than they would otherwise be. The

relative increase in cost, however, exceeds the relative increase in taxable

payroll. For any given year, reductions in the death rates for people who are

age 62 and over (people whose death rates are the highest) increase the numTable VI.D2.—Sensitivity to Varying Death-Rate Assumptions

[As a percentage of taxable payroll]

Valuation period

Average annual death-rate reduction1, 2

1The average annual death-rate reduction is the average annual geometric rate of decline in the age-sexadjusted death rate between 2004 and 2079. The overall decreases from the age-sex-adjusted death rate in

2004 to the corresponding rate in 2079 are, in order, 20 percent, 42 percent, and 62 percent. 2 The average annual death-rate reductions used for this analysis are 0.30 percent from the alternative I

assumptions, 0.72 percent from the alternative II assumptions, and 1.27 percent from the alternative III

assumptions. All other assumptions used for this analysis are from alternative II.

0.30 percent 0.72 percent 1.27 percent

Summarized income rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.55 14.55 14.55

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.00 14.02 14.03

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.84 13.87 13.90

Summarized cost rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.57 13.72 13.88

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.73 15.15 15.62

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.17 15.79 16.52

Actuarial balance:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +.98 +.83 +.67

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -.73 -1.13 -1.59

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.33 -1.92 -2.63

Year of combined trust fund exhaustion . . . . . . . . . . . . . 2044 2041 2038
151

Long-Range Sensitivity Analysis

ber of retired-worker beneficiaries (and, therefore, the amount of retirement

benefits paid) without adding significantly to the number of covered workers

(and, therefore, to the taxable payroll). Although reductions for people aged

50 to retirement eligibility age do result in significant increases to the taxable

payroll, those increases are not large enough to offset the sum of the additional retirement benefits mentioned above and the disability benefits paid to

additional beneficiaries at these pre-retirement ages, which are ages of high

disability incidence. At ages under 50, death rates are so low that even substantial reductions would not result in significant increases in the numbers of

covered workers or beneficiaries. Consequently, if death rates for all ages are

lowered by about the same relative amount, cost increases at a rate greater

than the rate of growth in payroll, thereby resulting in higher cost rates and,

therefore, lower actuarial balances. Each additional 0.1-percentage-point

reduction in the average annual death-rate reduction, relative to the 0.72-percent reduction assumed for alternative II, decreases the long-range actuarial

balance by about 0.13 percent of taxable payroll.

3. Net Immigration

Table VI.D3 shows the estimated OASDI income rates, cost rates, and actuarial balances, under alternative II with various assumptions about the magnitude of net immigration. These assumptions are that the annual net

immigration will be 672,500 persons, 900,000 persons, and 1,300,000 persons as assumed for alternatives III, II, and I, respectively.

Table VI.D3.—Sensitivity to Varying Net-Immigration Assumptions

[As a percentage of taxable payroll]

Valuation period

Ultimate net immigration per year1, 2

1 Net immigration per year is the assumed annual net immigration to the Social Security area, including both

legal and other immigration.

2 The ultimate net immigration per year assumptions used for this analysis are 672,500 from the alternative

III assumptions, 900,000 from the alternative II assumptions, and 1,300,000 from the alternative I assumptions. All other assumptions used for this analysis are from alternative II.

672,500 900,000 1,300,000

Summarized income rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.57 14.55 14.52

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.05 14.02 13.98

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.90 13.87 13.82

Summarized cost rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.84 13.72 13.57

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.34 15.15 14.88

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.01 15.79 15.49

Actuarial balance:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +.73 +.83 +.95

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.30 -1.13 -.90

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2.11 -1.92 -1.67

Year of combined trust fund exhaustion . . . . . . . . . . . . . 2039 2041 2043
Appendices

152

For all three periods, the cost rate decreases with increasing rates of net

immigration. For the 25-year period, the cost rate decreases from

13.84 percent of taxable payroll (for annual net immigration of 672,500 persons) to 13.57 percent (for annual net immigration of 1,300,000 persons).

For the 50-year period, it decreases from 15.34 percent to 14.88 percent, and

for the 75-year period, it decreases from 16.01 percent to 15.49 percent. The

actuarial balance increases from +0.73 to +0.95 percent for the 25-year

period, from -1.30 to -0.90 for the 50-year period, and from -2.11 to

-1.67 percent for the 75-year period.

The cost rate decreases with increasing rates of net immigration because

immigration occurs at relatively young ages, thereby increasing the numbers

of covered workers earlier than the numbers of beneficiaries. Each additional

group of 100,000 immigrants relative to the 900,000 net immigration

assumed for alternative II, increases the long-range actuarial balance by

about 0.07 percent of taxable payroll.

4. Real-Wage Differential

Table VI.D4 shows the estimated OASDI income rates, cost rates, and actuarial balances, on the basis of alternative II with various assumptions about

the real-wage differential. These assumptions are that the ultimate real-wage

differential will be 0.6 percentage point, 1.1 percentage points, and 1.6 percentage points as assumed for alternatives III, II, and I, respectively. In each

case, the ultimate annual increase in the CPI is assumed to be 2.8 percent (as

assumed for alternative II), yielding ultimate percentage increases in average

annual wages in covered employment of 3.4, 3.9, and 4.4 percent.

For the 25-year period, the cost rate decreases from 14.14 percent (for a realwage differential of 0.6 percentage point) to 13.32 percent (for a differential

of 1.6 percentage points). For the 50-year period, it decreases from 15.76 to

14.54 percent, and for the 75-year period it decreases from 16.46 to

15.13 percent. The actuarial balance increases from +0.51 to +1.14 percent

for the 25-year period, from -1.62 to -0.64 for the 50-year period, and from

-2.45 to -1.39 percent for the 75-year period.
153

Long-Range Sensitivity Analysis

The cost rate decreases with increasing real-wage differentials because

higher wages affect the taxable payroll immediately, but increase benefit levels only gradually as new beneficiaries become entitled. In addition, cost-ofliving adjustments (COLAs) to benefits are not affected by changes in

wages, but only in prices. Each 0.5-percentage-point increase in the assumed

real-wage differential increases the long-range actuarial balance by about

0.53 percent of taxable payroll.

5. Consumer Price Index

Table VI.D5 shows the estimated OASDI income rates, cost rates, and actuarial balances, on the basis of alternative II with various assumptions about

the rate of increase for the Consumer Price Index (CPI). These assumptions

are that the ultimate annual increase in the CPI will be 1.8 percent,

2.8 percent, and 3.8 percent as assumed for alternatives I, II, and III, respectively. In each case, the ultimate real-wage differential is assumed to be

1.1 percentage points (as assumed for alternative II), yielding ultimate percentage increases in average annual wages in covered employment of 2.9,

3.9, and 4.9 percent.

Table VI.D4.—Sensitivity to Varying Real-Wage Assumptions

[As a percentage of taxable payroll]

Valuation period

Ultimate percentage increase in wages-CPI1, 2

1The first value in each pair is the assumed ultimate annual percentage increase in average wages in covered

employment. The second value is the assumed ultimate annual percentage increase in the Consumer Price

Index. The difference between the two values is the ultimate real-wage differential. 2 The ultimate real-wage differentials of 0.6, 1.1, and 1.6 percentage points are the same as in alternatives

III, II, and I, respectively. All other assumptions used for this analysis are from alternative II.

3.4-2.8 3.9-2.8 4.4-2.8

Summarized income rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.65 14.55 14.46

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.14 14.02 13.90

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.01 13.87 13.74

Summarized cost rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.14 13.72 13.32

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.76 15.15 14.54

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.46 15.79 15.13

Actuarial balance:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +.51 +.83 +1.14

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.62 -1.13 -.64

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2.45 -1.92 -1.39

Year of combined trust fund exhaustion . . . . . . . . . . . . . 2037 2041 2047
Appendices

154

For all three periods, the cost rate decreases with greater assumed rates of

increase in the CPI. For the 25-year period, the cost rate decreases from

13.88 (for CPI increases of 1.8 percent) to 13.57 percent (for CPI increases

of 3.8 percent). For the 50-year period, it decreases from 15.36 to

14.94 percent, and for the 75-year period, it decreases from 16.04 to

15.56 percent. The actuarial balance increases from +0.71 to +0.94 percent

for the 25-year period, from -1.31 to -0.95 for the 50-year period, and from

-2.14 to -1.72 percent for the 75-year period.

The patterns described above result primarily from the time lag between the

effects of the CPI changes on taxable payroll and on benefit payments. When

assuming a greater rate of increase in the CPI (in combination with a constant real-wage differential), the effect on taxable payroll due to a greater rate

of increase in average wages is experienced immediately, while the effect on

benefits due to a larger COLA is experienced with a lag of about 1 year.

Thus, the higher taxable payrolls have a stronger effect than the higher benefits, thereby resulting in lower cost rates. The effect of each 1.0-percentagepoint increase in the rate of change assumed for the CPI is an increase in the

long-range actuarial balance of about 0.21 percent of taxable payroll.

6. Real Interest Rate

Table VI.D6 shows the estimated OASDI income rates, cost rates, and actuarial balances, on the basis of alternative II with various assumptions about

Table VI.D5.—Sensitivity to Varying CPI-Increase Assumptions

[As a percentage of taxable payroll]

Valuation period

Ultimate percentage increase in wages-CPI1, 2

1The first value in each pair is the assumed ultimate annual percentage increase in average wages in covered

employment. The second value is the assumed ultimate annual percentage increase in the Consumer Price

Index. The difference between the two values is the ultimate real-wage differential. 2 The ultimate CPI increases of 1.8, 2.8, and 3.8 percent are the same as in alternatives I, II, and III, respectively. The ultimate real-wage differential of 1.1 percentage points is the same as in alternative II. All other

assumptions used for this analysis are also from alternative II.

2.9-1.8 3.9-2.8 4.9-3.8

Summarized income rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.59 14.55 14.51

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.05 14.02 13.99

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.90 13.87 13.84

Summarized cost rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.88 13.72 13.57

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.36 15.15 14.94

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.04 15.79 15.56

Actuarial balance: 

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +.71 +.83 +.94

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.31 -1.13 -.95

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2.14 -1.92 -1.72

Year of combined trust fund exhaustion . . . . . . . . . . . 2039 2041 2043
155

Long-Range Sensitivity Analysis

the annual real interest rate for special public-debt obligations issuable to the

trust funds, which are compounded semiannually. These assumptions are that

the ultimate annual real interest rate will be 2.2 percent, 3.0 percent, and

3.7 percent as assumed for alternatives III, II, and I, respectively. In each

case, the ultimate annual increase in the CPI is assumed to be 2.8 percent (as

assumed for alternative II), resulting in ultimate annual yields of 5.1, 5.9, and

6.6 percent.

For the 25-year period, the cost rate decreases slightly with increasing real

interest rates from 13.87 percent (for an ultimate real interest rate of 2.2 percent) to 13.60 percent (for an ultimate real interest rate of 3.7 percent). For

the 50-year period, it decreases from 15.45 to 14.88 percent, and for the

75-year period, it decreases from 16.23 to 15.43 percent. The actuarial balance increases from +0.59 to +1.03 percent for the 25-year period, from

-1.55 to -0.77 percent for the 50-year period, and from -2.48 to -1.44 percent

for the 75-year period. Each 0.5-percentage-point increase in the assumed

real interest rate increases the long-range actuarial balance by about

0.35 percent of taxable payroll.

7. Disability Incidence Rates

Table VI.D7 shows the estimated OASDI income rates, cost rates, and actuarial balances, on the basis of alternative II with various assumptions concerning future disability incidence rates. For all three alternatives, incidence

Table VI.D6.—Sensitivity to Varying Real-Interest Assumptions

[As a percentage of taxable payroll]

Valuation period

Ultimate annual real interest rate1, 2

1The ultimate real interest rate is defined to be the effective annual yield on assets held by the trust funds

divided by the annual rate of growth in the CPI.

2 The ultimate annual real interest rates used for this analysis are 2.2 percent from the alternative III assumptions, 3.0 percent from the alternative II assumptions, and 3.7 percent from the alternative I assumptions. All

other assumptions used for this analysis are from alternative II.

2.2 percent 3.0 percent 3.7 percent

Summarized income rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.46 14.55 14.63

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.91 14.02 14.12

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.75 13.87 13.98

Summarized cost rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.87 13.72 13.60

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.45 15.15 14.88

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.23 15.79 15.43

Actuarial balance:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +.59 +.83 +1.03

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.55 -1.13 -.77

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2.48 -1.92 -1.44

Year of combined trust fund exhaustion . . . . . . . . . . . . . 2038 2041 2044
Appendices

156

rates by age and sex are assumed to vary during the early years of the projection period before attaining ultimate levels in 2027. The ultimate levels

attained vary by sex. In comparison to the corresponding annual rates experienced during the base period 1994-96, the ultimate rates for men are about

15 percent lower for alternative I, about 7 percent higher for alternative II,

and about 28 percent higher for alternative III. For women they are about

19 percent lower for alternative I, 1 percent higher for alternative II, and

21 percent higher for alternative III. 

For the 25-year period, the cost rate increases with increasing disability incidence rates from 13.53 percent (for the relatively low rates assumed for

alternative I) to 13.96 percent (for the relatively high rates assumed for

alternative III). For the 50-year period, it increases from 14.89 to 15.42 percent, and for the 75-year period, it increases from 15.52 to 16.08 percent.

The actuarial balance decreases from +1.02 to +0.60 percent for the 25-year

period, from -0.88 to -1.40 percent for the 50-year period, and from -1.65 to

-2.20 percent for the 75-year period.

8. Disability Termination Rates

Table VI.D8 shows the estimated OASDI income rates, cost rates, and actuarial balances, on the basis of alternative II with various assumptions about

future disability termination rates. For alternative II, death-termination rates

by age and sex are assumed to decline until they reach levels by the end of

the 75-year period that, for men and women, respectively, are about

63 percent and 59 percent lower than those experienced during the base

Table VI.D7.—Sensitivity to Varying Disability Incidence Assumptions

[As a percentage of taxable payroll]

Valuation period

Disability incidence rates

based on alternative—

I II III

Summarized income rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.55 14.55 14.55

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.01 14.02 14.02

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.86 13.87 13.87

Summarized cost rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.53 13.72 13.96

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.89 15.15 15.42

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.52 15.79 16.08

Actuarial balance:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +1.02 +.83 +.60

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -.88 -1.13 -1.40

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.65 -1.92 -2.20

Year of combined trust fund exhaustion . . . . . . . . . . . . . 2044 2041 2038
157

Long-Range Sensitivity Analysis

period 1991-95. For the other alternatives, the rates are assumed to spread

gradually from the rates for alternative II. By the end of the projection

period, for alternatives I and III, respectively, the rates for men are about

48 percent and 78 percent lower than those experienced during the base

period; for women the corresponding rates are about 44 percent and

76 percent lower than those experienced during the base period.

For all three alternatives, ultimate recovery-termination rates by age and sex

are assumed to be attained in the twentieth year of the projection period. For

alternative II, such rates are assumed to be 95 percent higher for men and

93 percent higher for women than those experienced in the base period,

1991-95. The ultimate rates for alternative I are assumed to be 134 percent

higher for men and 131 percent higher for women than those experienced in

the base period. The ultimate rates for alternative III are assumed to be

56 percent higher for men and 54 percent higher for women than those experienced in the base period.

For the 25-year period, the cost rate increases with decreasing disability termination rates from 13.69 percent (for the relatively high rates assumed for

alternative I) to 13.76 percent (for the relatively low rates assumed for

alternative III). For the 50-year period, it increases from 15.11 to

15.18 percent, and for the 75-year period, it increases from 15.76 to

15.82 percent. The actuarial balance decreases from +0.86 to +0.79 percent

for the 25-year period, from -1.09 to -1.17 percent for the 50-year period,

and from -1.89 to -1.96 percent for the 75-year period.

Table VI.D8.—Sensitivity to Varying Disability Termination Assumptions

[As a percentage of taxable payroll]

Valuation period

Disability termination rates

based on alternative—

I II III

Summarized income rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.55 14.55 14.55

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.02 14.02 14.02

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.87 13.87 13.87

Summarized cost rate:

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.69 13.72 13.76

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.11 15.15 15.18

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.76 15.79 15.82

Actuarial balance: 

25-year: 2005-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +.86 +.83 +.79

50-year: 2005-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.09 -1.13 -1.17

75-year: 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.89 -1.92 -1.96

Year of combined trust fund exhaustion . . . . . . . . . . . . . 2041 2041 2040
Appendices

158

E. STOCHASTIC PROJECTIONS

Significant uncertainty surrounds the estimates under the intermediate

assumptions, especially for a period as long as 75 years. This appendix presents a way to illustrate the uncertainty of these estimates. It is intended to

supplement the traditional methods of examining such uncertainty and to

illustrate the potential value of new techniques.

1. Background

The Trustees Report has traditionally shown additional estimates using a low

cost and a high cost set of specified assumptions to reflect the presence of

uncertainty. These additional estimates provide a range of possible outcomes

for the projections. However, they provide no indication of the probability

that actual future experience will be inside or outside the range of these estimates. This appendix presents the results of a model, based on stochastic

modeling techniques, that estimates a probability distribution of future outcomes of the financial status of the combined OASI and DI Trust Funds. It

should be noted that this model is in its early stages of development. Future

improvements and refinements to the model are expected. In particular,

future revisions are expected to reflect a fuller range of uncertainty about the

future, as is discussed below.

2. Methodology

Other sections of this report provide estimates of the financial status of the

combined OASI and DI Trust Funds using a “deterministic” model. For the

deterministic model, certain assumptions are made regarding levels of fertility, changes in mortality, immigration levels, emigration levels, net other

immigration levels, the Consumer Price Index, average real wages, unemployment rates, trust fund real yield rates, and disability incidence and recovery rates. Each of these variables will reach an assumed ultimate value at a

specific point during the long-range period and will maintain that value

throughout the remainder of the period. As mentioned above, three deterministic scenarios are developed assuming separate, specified values for each of

these variables.

In contrast, the results of 5,000 independent stochastic simulations are presented in this appendix. Each of the 5,000 simulations is determined by

allowing the above variables to vary throughout the long-range period. The

fluctuation in the variable is projected by using standard time-series modeling, a method designed to help make inferences based on historical data.

Generally, each variable is modeled by an equation that captures a relationship between current and prior years’ values of the variable and introduces
159

Stochastic Projections 

year-by-year random variation, as reflected in the historical period. For some

variables, the equations additionally reflect relationships with other variables. Parameters for the equations are estimated using historical data for

periods ranging from 20 years to 103 years depending on the nature and

quality of data available. More detail on this model, and stochastic modeling

in general, is available on the internet.1 Each time-series equation is

designed such that, in the absence of random variation, the value of the variable would equal the value assumed under the intermediate set of assumptions.

For each simulation of the model, values of the variables listed above are

determined by using Monte Carlo techniques to randomly assign the year-byyear variations. Each simulation produces an estimate of the financial status

of the combined OASI and DI Trust Funds. Results shown in this section,

based on the 5,000 simulations of the model, reflect the distribution of

results.

The results from this model should be interpreted with caution and with a full

understanding of the inherent limitations. Results are very sensitive to equation specifications, degrees of interdependence among variables, and the historical periods used for the estimates. For some variables, using the

variations exhibited in a relatively recent historical period may not provide a

realistic representation of the potential variation for the future. In addition,

results would differ if random variations had been applied to additional variables other than those mentioned above (such as labor force participation

rates, retirement rates, marriage rates, and divorce rates). Furthermore, additional variability could result from incorporating statistical approaches that

would more fully model change in the long-range central tendencies of the

variables. The historical period available for most variables is relatively

homogeneous and does not reflect many substantial shifts. The time-series

modeling reflects what occurred in the historical period. As a result, the variation indicated in this appendix should be viewed as the minimum plausible

variation for the future. Substantial shifts, as predicted by many experts and

as seen in prior centuries, are not fully reflected in the current model.

 1 The internet address is: www.socialsecurity.gov/OACT/stochastic/index.html.
Appendices

160

3. Results

Simulated probability distributions of the annual trust fund ratios for the

combined OASI and DI Trust Funds are shown in figure VI.E1. The two

extreme lines in this figure illustrate the range within which future annual

trust fund ratios are estimated to occur 95 percent of the time (i.e., a 95-percent confidence interval). In other words, actual future trust fund ratios in a

given year would be expected to exceed the upper bound only 2.5 percent of

the time or to fall below the lower bound 2.5 percent of the time. Other lines

in the figure display additional confidence intervals (80-percent, 60-percent,

40-percent, and 20-percent) around future annual trust fund ratios. The

median estimate for each year indicates the trust fund ratio which is projected by this model to fall exactly in the middle of possible outcomes for

that year. It is important to note that these lines do not represent the results of

individual stochastic simulations. Instead, for each given year, they represent

the percentile distribution of trust fund ratios based on all stochastic simulations for that year.

The median estimate for each year indicates that the assets of the combined

OASI and DI Trust Funds would be exhausted by 2041 with a probability of

50 percent. This exhaustion date is the same as the year of exhaustion projected under the intermediate assumptions. Figure VI.E1 shows that the

95-percent confidence interval for the trust fund ratio in 2030 ranges from

439 to 80 percent of annual cost. In comparison, the 2030 trust fund ratios

for the low cost and high cost alternatives are each outside this range, at 493

and 10 percent, respectively. By 2079, the range represented by the low cost

and high cost projections increases substantially beyond the boundaries of

the 95-percent stochastic confidence interval, as seen from the values for the

open group unfunded obligation in table VI.E1. This increased variation of

the alternatives relative to the stochastic confidence interval is also seen in

the positive trust fund ratio for the low cost scenario for 2079.
161

Stochastic Projections 

The probability distribution of the year-by-year OASDI cost rates (i.e., cost

as a percentage of taxable payroll) is shown in figure VI.E2. The range of the

cost rates widens as the projections move further into the future, reflecting

increasing uncertainty. The income rate under the intermediate assumptions

is also included in the figure in order to give some indication of the patterns

of cash flow for the OASDI program. Only this income rate is included

because of the relatively small variation in income rates throughout the projection period. The lines in the figure display the median set (50th percentile)

of estimated annual cost rates and the 95-percent, 80-percent, 60-percent, 40-

percent, and 20-percent confidence intervals expected for future annual cost

rates. It is important to note that these lines do not represent the results of

individual stochastic simulations. Instead, for each given year, they represent

the percentile distribution of cost rates based on all stochastic simulations for

that year. The projected cost rates for the year 2035 for the low cost and high

cost alternatives described earlier are 14.80 percent of payroll and 20.22 percent of payroll, respectively. These are quite close to the limits of the 95-percent confidence interval, as seen in figure VI.E2. By 2079, the cost rates for

these alternatives, 13.84 and 26.76 percent of payroll, are still fairly close to

the limits of the 95-percent confidence interval (14.54 and 26.94 percent of

payroll).

 Figure VI.E1.—Annual Trust Fund Ratios

0%

100%

200%

300%

400%

500%

600%

2005 2020 2035 2050 2065 2080

Projection year

50%

97.5%

2.5%

90%

10%
Appendices

162

Table VI.E1 displays long-range actuarial estimates for the combined

OASDI program resulting from using both the deterministic and stochastic

approaches. Actuarial estimates included in the table are for the long-range

period, 2005-79. Stochastic estimates are shown for the median (50th percentile) and for the 95-percent and 80-percent confidence intervals. For comparison, deterministic estimates are shown for the intermediate, low cost, and

high cost assumptions. Each stochastic estimate displayed in the table does

represent the results of one stochastic simulation. However, for a given percentile, the stochastic estimates shown for the different long-range actuarial

measures are generally not from the same stochastic simulation.

Median stochastic estimates for the actuarial measures displayed in table

VI.E1 are the same or slightly more pessimistic for the combined OASI and

DI Trust Funds than those projected under the intermediate assumptions. The

median estimate of the long-range actuarial balance is -2.01 percent of taxable payroll, about 0.09 percentage point lower than projected under the

intermediate assumptions. The median estimate for the first year cost

exceeds tax income is 2017 and for the year assets first become exhausted is

2041. These are the same as those projected under the intermediate assumptions. The median estimate for the annual cost in the 75th year of the projection period is 19.55 as a percent of taxable payroll and 6.55 as a percent of

GDP. The comparable estimates using the intermediate assumptions are

19.08 and 6.39, respectively.

 Figure VI.E2.—Annual Cost Rates

5%

10%

15%

20%

25%

30%

2005 2020 2035 2050 2065 2080

Projection year

50%

97.5%

2.5%

90%

10%

Income Rate
163

Stochastic Projections 

The 95-percent confidence interval determined by the stochastic modeling

projections can be compared to the range of variation defined by the traditional low cost and high cost alternatives. For three of the measures in table

VI.E1 (the actuarial balance, the open group unfunded obligation, and the

year assets become exhausted), the 95-percent stochastic projection range is

narrower than the range defined by the low cost and high cost alternatives.

That is, for these measures, the estimates under the low cost and high cost

alternatives fall outside the 95-percent confidence interval determined by the

stochastic modeling projections. In contrast, for two other measures in the

table (the first year cost exceeds tax income and the annual cost in the 75th

year of the projection period expressed as a percent of GDP), the 95-percent

stochastic projection range includes the estimates under the low cost and

high cost alternatives. For the remaining measure in the table (the annual

cost in the 75th year of the projection period expressed as a percent of taxable payroll), the 95-percent stochastic projection range includes the estimate

under the high cost alternative, but does not include the low cost estimate.

Table VI.E1.—Long-Range Estimates Relating to the Actuarial Status of the Combined 

OASDI Program

[Comparison of deterministic and stochastic results]

Traditional

deterministic model Stochastic model

IntermediateLow

Cost

High

Cost

Median

50th

percentile

80-Percent

confidence interval

95-Percent

confidence interval

10th

percentile

90th

percentile

2.5th

percentile

97.5th

percentile

Actuarial balance . . . . . . -1.92 0.38 -4.96 -2.01 -3.15 -0.99 -3.83 -0.49

Open group unfunded 

obligation (in trillions) $4.0 -$1.1 $10.9 $4.2 $7.0 $1.9 $8.8 $0.8

First year cost exceeds 

tax income . . . . . . . . . 2017 2022 2013 2017 2014 2020 2013 2022

Year assets become 

exhausted . . . . . . . . . . 2041 1/

1 The fund is not estimated to be exhausted within the projection period.

2030 2041 2035 2052 2032 2064

Annual cost in 75th year 

(percent of taxable 

payroll) . . . . . . . . . . . . 19.08 13.84 26.76 19.55 16.10 24.15 14.54 26.94

Annual cost in 75th year 

(percent of GDP) . . . . 6.39 5.01 8.26 6.55 5.39 8.09 4.87 9.02
Appendices

164

F. ESTIMATES FOR OASDI AND HI, SEPARATE AND COMBINED

In this appendix, long-range actuarial estimates for the OASDI and Hospital

Insurance (HI) programs are presented separately and on a combined basis.

These estimates facilitate analysis of the adequacy of the income and assets

of these programs relative to their cost under current law. Estimates for the

Supplementary Medical Insurance (SMI) program are not included in this

appendix because adequate financing is guaranteed in the law, and because

the SMI program is not financed through a payroll tax.

The emphasis in this appendix on combined operations, while significant,

should not obscure the analysis of the financial status of the individual trust

funds, which are legally separate and cannot be commingled. In addition, the

factors which determine the costs of the OASI, DI, and HI programs differ

substantially.

1. Estimates as a Percentage of Taxable Payroll

Comparing and combining cost and income rates for the OASDI and HI programs as percentages of taxable payroll require a note of caution. The taxable payrolls for the HI program are larger than those estimated for the

OASDI program because (1) a larger maximum taxable amount was established for the HI program in 1991, with the maximum being eliminated altogether for the HI program in 1994, (2) a larger proportion of Federal, State,

and local government employees have their wages covered under the HI program, and (3) the earnings of railroad workers are included directly in the HI

taxable payroll but not in the OASDI taxable payroll (railroad contributions

for the equivalent of OASDI benefits are accounted for in a net interchange

that occurs annually between the OASDI and Railroad Retirement programs). As a result, the HI taxable payroll is about 25 percent larger than the

OASDI taxable payroll throughout the long-range period. Nonetheless, combined OASDI and HI rates shown in this section are computed by adding the

separately derived rates for the programs. The resulting combined rates may

be interpreted as those applicable to the taxable payroll in the amount of the

OASDI payroll, with the separate HI rates being additionally applicable to

the excess of the HI payroll over the OASDI payroll.

As with the OASI and DI Trust Funds, income to the HI Trust Fund comes

primarily from contributions paid by employees, employers, and selfemployed persons. The combined OASDI and HI contribution rate for

employees and their employers is often referred to as the FICA tax, because

it is authorized by the Federal Insurance Contributions Act. Contribution

rates for the OASDI and HI programs are shown in table VI.F1.
165

OASDI & HI: Percent of Payroll

Table VI.F2 shows estimated annual income rates and cost rates for the

OASDI program, the HI program, and the combined OASDI and HI programs, based on the low cost, intermediate, and high cost sets of assumptions

(alternatives I, II, and III) described earlier in this report. These annual rates

are intended to indicate the cash-flow operation of the programs. Therefore,

income rates exclude interest earned on trust fund assets, and cost rates

exclude the cost of accumulating ending target trust fund balances. Table

VI.F2 also shows the differences between income rates and cost rates, called

balances. Estimates shown for the combined trust funds are theoretical

because no authority currently exists for borrowing by or transfers among

these trust funds.

Under all three sets of assumptions, the combined OASDI and HI cost rate is

projected to rise above current levels, with the sharpest increase occurring

during the period 2010-30. Under the high cost set of assumptions, annual

deficits are projected to occur beginning in 2011, and to continue for the

remainder of the 75-year projection period. The cost rate is projected to rise

to about four times its current level by the end of the projection period.

Under the intermediate assumptions, annual deficits begin in 2016, with the

cost rate more than doubling by the end of the projection period. Under the

low cost assumptions, the cost rate is projected to increase by about

40 percent, by the end of the period, with annual deficits beginning in 2023.

Table VI.F1.—Contribution Rates for the OASDI and HI Programs

[In percent]

Calendar years

Employees and employers, each Self employed

OASDI HI Combined OASDI HI Combined

1966 . . . . . . . . . . . . . . 3.85 0.35 4.20 5.80 0.35 6.15

1967 . . . . . . . . . . . . . . 3.90 .50 4.40 5.90 .50 6.40

1968 . . . . . . . . . . . . . . 3.80 .60 4.40 5.80 .60 6.40

1969-70 . . . . . . . . . . . 4.20 .60 4.80 6.30 .60 6.90

1971-72 . . . . . . . . . . . 4.60 .60 5.20 6.90 .60 7.50

1973 . . . . . . . . . . . . . . 4.85 1.00 5.85 7.00 1.00 8.00

1974-77 . . . . . . . . . . . 4.95 .90 5.85 7.00 .90 7.90

1978 . . . . . . . . . . . . . . 5.05 1.00 6.05 7.10 1.00 8.10

1979-80 . . . . . . . . . . . 5.08 1.05 6.13 7.05 1.05 8.10

1981 . . . . . . . . . . . . . . 5.35 1.30 6.65 8.00 1.30 9.30

1982-83 . . . . . . . . . . . 5.40 1.30 6.70 8.05 1.30 9.35

19841 . . . . . . . . . . . . . 

1 See footnote 1 under table VI.A1 in the appendix titled “History of OASI and DI Trust Fund Operations”

for a description of tax credits allowed against the combined OASDI and HI taxes on net earnings from selfemployment in 1984-89.

5.70 1.30 7.00 11.40 2.60 14.00

1985 . . . . . . . . . . . . . . 5.70 1.35 7.05 11.40 2.70 14.10

1986-87 . . . . . . . . . . . 5.70 1.45 7.15 11.40 2.90 14.30

1988-89 . . . . . . . . . . . 6.06 1.45 7.51 12.12 2.90 15.02

1990 and later. . . . . . . 6.20 1.45 7.65 12.40 2.90 15.30
Appendices

166

Table VI.F2.—Estimated OASDI and HI Annual Income Rates, Cost Rates, 

and Balances, Calendar Years 2005-80

[As a percentage of taxable payroll1]

Calendar year

OASDI HI Combined

Income

rate

Cost

rate Balance

Income

rate

Cost

rate Balance

Income

rate

Cost

rate Balance

Intermediate:

2005 . . . . . . 12.72 11.13 1.59 3.06 3.06 2/ 15.78 14.19 1.58

2006 . . . . . . 12.73 11.00 1.73 3.07 3.09 -0.02 15.80 14.09 1.71

2007 . . . . . . 12.74 10.95 1.79 3.08 3.12 -.03 15.83 14.07 1.76

2008 . . . . . . 12.78 10.99 1.80 3.11 3.15 -.04 15.89 14.14 1.76

2009 . . . . . . 12.77 11.13 1.65 3.10 3.19 -.09 15.87 14.32 1.56

2010 . . . . . . 12.79 11.25 1.54 3.11 3.24 -.12 15.91 14.49 1.42

2011 . . . . . . 12.84 11.42 1.42 3.14 3.29 -.15 15.98 14.71 1.27

2012 . . . . . . 12.87 11.67 1.20 3.16 3.36 -.20 16.03 15.03 1.00

2013 . . . . . . 12.90 11.93 .97 3.18 3.44 -.26 16.08 15.37 .71

2014 . . . . . . 12.92 12.21 .71 3.18 3.51 -.33 16.10 15.72 .38

2015 . . . . . . 12.94 12.49 .45 3.20 3.60 -.41 16.13 16.09 .04

2020 . . . . . . 13.03 14.03 -1.00 3.25 4.14 -.89 16.28 18.17 -1.88

2025 . . . . . . 13.12 15.55 -2.42 3.30 4.84 -1.54 16.42 20.38 -3.96

2030 . . . . . . 13.20 16.74 -3.54 3.34 5.60 -2.26 16.54 22.34 -5.81

2035 . . . . . . 13.24 17.37 -4.13 3.36 6.37 -3.01 16.61 23.75 -7.14

2040 . . . . . . 13.26 17.52 -4.26 3.37 7.05 -3.68 16.63 24.57 -7.93

2045 . . . . . . 13.27 17.55 -4.28 3.37 7.65 -4.28 16.64 25.20 -8.55

2050 . . . . . . 13.28 17.64 -4.36 3.38 8.22 -4.84 16.66 25.86 -9.20

2055 . . . . . . 13.30 17.84 -4.55 3.38 8.82 -5.43 16.68 26.66 -9.98

2060 . . . . . . 13.31 18.10 -4.79 3.39 9.52 -6.13 16.71 27.63 -10.92

2065 . . . . . . 13.33 18.40 -5.07 3.40 10.32 -6.91 16.74 28.71 -11.98

2070 . . . . . . 13.35 18.67 -5.32 3.41 11.20 -7.79 16.76 29.88 -13.12

2075 . . . . . . 13.36 18.90 -5.53 3.42 12.10 -8.69 16.78 31.00 -14.22

2080 . . . . . . 13.38 19.12 -5.75 3.43 13.04 -9.61 16.80 32.16 -15.36

Low Cost:

2005 . . . . . . 12.72 11.08 1.63 3.06 2.98 .08 15.78 14.07 1.71

2006 . . . . . . 12.73 10.90 1.82 3.07 2.96 .11 15.80 13.86 1.93

2007 . . . . . . 12.74 10.78 1.96 3.08 2.93 .15 15.82 13.71 2.11

2008 . . . . . . 12.78 10.70 2.07 3.11 2.91 .20 15.88 13.61 2.28

2009 . . . . . . 12.76 10.71 2.05 3.09 2.89 .21 15.85 13.60 2.26

2010 . . . . . . 12.78 10.72 2.06 3.11 2.87 .23 15.88 13.59 2.29

2011 . . . . . . 12.82 10.77 2.05 3.13 2.86 .27 15.95 13.63 2.32

2012 . . . . . . 12.85 10.90 1.95 3.15 2.87 .28 15.99 13.77 2.22

2013 . . . . . . 12.87 11.06 1.81 3.16 2.88 .28 16.03 13.94 2.09

2014 . . . . . . 12.88 11.24 1.65 3.17 2.89 .28 16.05 14.12 1.93

2015 . . . . . . 12.90 11.44 1.45 3.18 2.90 .27 16.07 14.35 1.73

2020 . . . . . . 12.97 12.63 .34 3.22 3.03 .19 16.19 15.66 .53

2025 . . . . . . 13.04 13.77 -.72 3.26 3.21 .05 16.30 16.97 -.67

2030 . . . . . . 13.10 14.55 -1.45 3.29 3.37 -.09 16.38 17.92 -1.54

2035 . . . . . . 13.12 14.80 -1.68 3.30 3.51 -.21 16.42 18.31 -1.89

2040 . . . . . . 13.12 14.60 -1.48 3.30 3.63 -.33 16.42 18.23 -1.81

2045 . . . . . . 13.11 14.33 -1.22 3.29 3.76 -.47 16.40 18.09 -1.69

2050 . . . . . . 13.11 14.14 -1.04 3.29 3.94 -.65 16.40 18.09 -1.69

2055 . . . . . . 13.11 14.06 -.95 3.29 4.20 -.92 16.40 18.27 -1.87

2060 . . . . . . 13.11 14.02 -.91 3.29 4.54 -1.25 16.40 18.56 -2.17

2065 . . . . . . 13.11 13.97 -.86 3.29 4.92 -1.63 16.40 18.89 -2.49

2070 . . . . . . 13.11 13.91 -.80 3.29 5.34 -2.05 16.40 19.25 -2.85

2075 . . . . . . 13.11 13.84 -.74 3.29 5.77 -2.49 16.39 19.62 -3.22

2080 . . . . . . 13.11 13.85 -.74 3.29 6.22 -2.93 16.39 20.07 -3.68
167

OASDI & HI: Percent of Payroll

Notes:

1. The income rate excludes interest income and certain transfers from the General Fund of the Treasury.

2. Totals do not necessarily equal the sums of rounded components.

In table VI.F3 values are summarized over the 25-year, 50-year, and 75-year

valuation periods (for which beginning fund balances are included in the

summarized income rates, and the cost of accumulating an ending fund balance equal to 100 percent of annual cost by the end of the period is included

in the summarized cost rates). Estimates shown for the combined trust funds

are theoretical because no authority currently exists for borrowing by or

transfers among these trust funds.

High Cost:

2005 . . . . . . 12.73 11.47 1.26 3.06 3.23 -0.17 15.79 14.70 1.09

2006 . . . . . . 12.74 11.43 1.31 3.08 3.31 -.23 15.82 14.74 1.08

2007 . . . . . . 12.76 11.50 1.26 3.09 3.39 -.30 15.85 14.89 .96

2008 . . . . . . 12.81 11.69 1.11 3.12 3.52 -.40 15.93 15.21 .72

2009 . . . . . . 12.79 11.95 .85 3.11 3.63 -.51 15.91 15.57 .33

2010 . . . . . . 12.82 12.13 .69 3.12 3.72 -.60 15.94 15.85 .09

2011 . . . . . . 12.88 12.44 .44 3.15 3.85 -.70 16.03 16.29 -.26

2012 . . . . . . 12.92 12.81 .10 3.18 4.02 -.84 16.09 16.83 -.74

2013 . . . . . . 12.95 13.15 -.20 3.20 4.20 -1.00 16.15 17.35 -1.20

2014 . . . . . . 12.97 13.52 -.55 3.21 4.37 -1.17 16.17 17.89 -1.72

2015 . . . . . . 12.99 13.85 -.86 3.22 4.57 -1.35 16.21 18.42 -2.21

2020 . . . . . . 13.10 15.68 -2.57 3.28 5.77 -2.49 16.39 21.45 -5.06

2025 . . . . . . 13.21 17.51 -4.30 3.34 7.43 -4.09 16.55 24.93 -8.38

2030 . . . . . . 13.31 19.13 -5.82 3.39 9.46 -6.07 16.71 28.59 -11.89

2035 . . . . . . 13.38 20.22 -6.84 3.43 11.74 -8.31 16.81 31.97 -15.16

2040 . . . . . . 13.43 20.86 -7.44 3.45 13.88 -10.43 16.88 34.75 -17.87

2045 . . . . . . 13.46 21.38 -7.92 3.47 15.77 -12.30 16.93 37.16 -20.23

2050 . . . . . . 13.50 21.97 -8.47 3.49 17.38 -13.89 16.98 39.34 -22.36

2055 . . . . . . 13.54 22.68 -9.14 3.51 18.76 -15.25 17.04 41.44 -24.39

2060 . . . . . . 13.58 23.48 -9.90 3.53 20.25 -16.72 17.12 43.74 -26.62

2065 . . . . . . 13.64 24.41 -10.77 3.56 21.94 -18.39 17.20 46.35 -29.16

2070 . . . . . . 13.69 25.32 -11.63 3.59 23.83 -20.24 17.28 49.15 -31.88

2075 . . . . . . 13.74 26.16 -12.42 3.61 25.75 -22.14 17.35 51.91 -34.56

2080 . . . . . . 13.78 26.90 -13.12 3.63 27.73 -24.10 17.41 54.63 -37.22

1 The taxable payroll for HI is significantly larger than the taxable payroll for OASDI because the HI taxable

maximum amount was eliminated beginning in 1994, and because HI covers all Federal civilian employees,

including those hired before 1984, all State and local government employees hired after April 1, 1986, and

railroad employees. Combined OASDI and HI rates are computed as the sum of the separately derived rates

for each program.

2 Between -0.005 and 0.005 percent of taxable payroll.

Table VI.F2.—Estimated OASDI and HI Annual Income Rates, Cost Rates, 

and Balances, Calendar Years 2005-80 (Cont.)

[As a percentage of taxable payroll1]

Calendar year

OASDI HI Combined

Income

rate

Cost

rate Balance

Income

rate

Cost

rate Balance

Income

rate

Cost

rate Balance
Appendices

168

Note: Totals do not necessarily equal the sums of rounded components.

Under the high cost assumptions, the combined OASDI and HI system is

projected to experience large actuarial deficits for the 25-year, 50-year, and

75-year valuation periods (table VI.F3, including beginning trust fund balances and the cost of ending fund targets). Under the intermediate assumptions, actuarial deficits smaller than those for the high cost assumptions are

projected for the 50-year and the 75-year valuation periods, and a positive

actuarial balance is projected for the 25-year valuation period. Under the low

cost assumptions, the combined OASDI and HI system is projected to have

positive actuarial balances for the 25-year and the 50-year valuation periods,

and a very small negative actuarial balance for the 75-year valuation period.

Table VI.F3.—Summarized OASDI and HI Income Rates and Cost Rates for Valuation 

Periods,1 Calendar Years 2005-79

[As a percentage of taxable payroll2]

1 Income rates include beginning trust fund balances and cost rates include the cost of reaching an ending

fund target equal to 100 percent of annual cost by the end of the period. 2 The taxable payroll for HI is significantly larger than the taxable payroll for OASDI because the HI taxable

maximum amount was eliminated beginning 1994, and because HI covers all Federal civilian employees,

including those hired before 1984, all State and local government employees hired after April 1, 1986, and

railroad employees. Combined OASDI and HI rates are computed as the sum of the separately derived rates

for each program.

Valuation

period 

OASDI HI Combined

Income

rate

 Cost

rate

Actuarial

balance

Income

rate

 Cost

rate

Actuarial

balance

Income

rate

 Cost

rate

Actuarial

balance

Intermediate:

25-years:

2005-29 . . . . . . 14.55 13.72 0.83 3.40 4.10 -0.69 17.95 17.82 0.14

50-years:

2005-54 . . . . . . 14.02 15.15 -1.13 3.39 5.35 -1.96 17.41 20.50 -3.09

75-years:

2005-79 . . . . . . 13.87 15.79 -1.92 3.39 6.48 -3.09 17.26 22.27 -5.01

Low Cost:

25-years:

2005-29 . . . . . . 14.50 12.56 1.94 3.39 3.12 .27 17.89 15.68 2.21

50-years:

2005-54 . . . . . . 13.93 13.25 .67 3.35 3.34 .01 17.28 16.59 .68

75-years:

2005-79 . . . . . . 13.74 13.36 .38 3.34 3.72 -.39 17.08 17.08 -.01

High Cost:

25-years:

2005-29 . . . . . . 14.61 15.21 -.60 3.42 5.69 -2.27 18.03 20.90 -2.87

50-years:

2005-54 . . . . . . 14.11 17.51 -3.40 3.43 9.35 -5.91 17.54 26.86 -9.32

75-years:

2005-79 . . . . . . 14.01 18.97 -4.96 3.46 12.23 -8.77 17.47 31.20 -13.73
169

OASDI & HI: Percent of GDP

2. Estimates as a Percentage of Gross Domestic Product

This section presents long-range projections of the operations of the combined Old-Age and Survivors Insurance and Disability Insurance (OASI and

DI) Trust Funds and of the Hospital Insurance (HI) Trust Fund expressed as a

percentage of gross domestic product (GDP). While expressing these fund

operations as a percentage of taxable payroll is the most useful approach for

assessing the financial status of the programs (see table IV.B1 and section

IV.B.1), analyzing them as a percentage of GDP provides an additional perspective on these fund operations in relation to the total value of goods and

services produced in the United States.

Table VI.F4 shows estimated income excluding interest, total cost, and the

resulting balance of the combined OASI and DI Trust Funds, of the HI Trust

Fund, and of the combined OASI, DI, and HI Trust Funds, expressed as percentages of GDP on the basis of each of the three alternative sets of assumptions. The estimated GDP on which these percentages are based is also

shown in table VI.F4. For OASDI, income excluding interest consists of payroll-tax contributions, proceeds from taxation of benefits, and various reimbursements from the General Fund of the Treasury. Total cost consists of

benefit payments, administrative expenses, net transfers from the trust funds

to the Railroad Retirement program, and payments for vocational rehabilitation services for disabled beneficiaries. For HI, income excluding interest

consists of payroll-tax contributions (including contributions from railroad

employment) and proceeds from taxation of OASDI benefits. Total cost consists of outlays (benefits and administrative expenses) for insured beneficiaries. Both the HI income and cost are on an incurred basis.

The OASDI annual balance (income excluding interest, less cost) as a percentage of GDP is projected to be positive on the basis of the low cost

assumptions until 2022. After 2021, deficits increase to a peak in about 2035,

and decrease thereafter. The OASDI balance is projected to be positive until

2017 on the basis of the intermediate assumptions and until 2013 on the basis

of the high cost assumptions, at which time balances become permanently

negative, with generally increasing deficits. The projected HI balance as a

percentage of GDP, is positive through 2026 on the basis of the low cost

assumptions. The HI balance is projected to be negative in the first projection year under the intermediate and high cost assumptions, with deficits

increasing steadily thereafter. The combined OASDI and HI balance as a percentage of GDP is projected to be positive through 2022 under the low cost

assumptions, through 2014 under the intermediate assumptions, and through

2009 under the high cost assumptions. Between 2010 and about 2035, under

all three sets of assumptions, both the OASDI and HI balances as percentages of GDP are projected to decline (or deficits increase) substantially
Appendices

170

because the baby-boom generation reaches retirement age during these years.

After balances cease to be positive under the intermediate and high cost

assumptions, the annual deficits increase fairly steadily for the combined

OASDI and HI programs.

By 2080, the combined OASDI and HI balances as percentages of GDP, are

projected to range from a deficit of 1.59 percent for the low cost assumptions

to a deficit of 13.49 percent for the high cost assumptions. Projected balances

differ by a much smaller amount for the tenth year, 2014, ranging from a

positive balance of 0.75 percent for the low cost assumptions to a deficit of

0.76 percent for the high cost assumptions.

The summarized long-range (75-year) balance as a percentage of GDP for

the combined OASDI and HI programs varies among the three alternatives,

by a relatively large amount (from a deficit of 0.04 percent, based on the low

cost assumptions, to a deficit of 5.60 percent, based on the high cost assumptions). The 25-year summarized balance varies by a smaller amount (from a

positive balance of 0.86 percent to a deficit of 1.28 percent). Summarized

rates are calculated on the present-value basis including the trust fund balances on January 1, 2005 and the cost of reaching a target trust fund level

equal to 100 percent of annual cost at the end of the period. (See section

IV.B.4 for further explanation.)
171

OASDI & HI: Percent of GDP

Table VI.F4.—OASDI and HI Annual and Summarized Income, Cost, and Balance 

as a Percentage of GDP, Calendar Years 2005-80 

Calendar year

Percentage of GDP GDP in

dollars

(billions)

OASDI HI Combined

Income1 Cost Balance Income1 Cost Balance Income1 Cost Balance

Intermediate:

2005 . . . . . . 4.82 4.26 0.56 1.45 1.45 2/ 6.27 5.71 0.56 $12,359

2006 . . . . . . 4.88 4.21 .67 1.46 1.47 -0.01 6.34 5.68 .66 13,020

2007 . . . . . . 4.87 4.19 .68 1.47 1.48 -.02 6.33 5.67 .66 13,710

2008 . . . . . . 4.87 4.20 .67 1.48 1.50 -.02 6.35 5.70 .65 14,424

2009 . . . . . . 4.86 4.24 .61 1.47 1.52 -.04 6.33 5.76 .57 15,160

2010 . . . . . . 4.86 4.28 .57 1.48 1.54 -.06 6.34 5.82 .51 15,926

2011 . . . . . . 4.87 4.34 .53 1.49 1.56 -.07 6.36 5.90 .46 16,721

2012 . . . . . . 4.87 4.42 .45 1.50 1.59 -.09 6.37 6.02 .35 17,534

2013 . . . . . . 4.87 4.51 .36 1.50 1.63 -.12 6.37 6.14 .23 18,369

2014 . . . . . . 4.86 4.61 .25 1.51 1.66 -.15 6.37 6.27 .10 19,232

2015 . . . . . . 4.86 4.71 .16 1.51 1.70 -.19 6.37 6.41 -.04 20,127

2020 . . . . . . 4.86 5.24 -.38 1.52 1.94 -.42 6.38 7.17 -.80 25,150

2025 . . . . . . 4.84 5.75 -.91 1.53 2.24 -.71 6.37 7.99 -1.62 31,204

2030 . . . . . . 4.83 6.14 -1.31 1.53 2.57 -1.04 6.36 8.71 -2.35 38,644

2035 . . . . . . 4.80 6.31 -1.51 1.53 2.90 -1.37 6.33 9.21 -2.88 47,952

2040 . . . . . . 4.76 6.31 -1.54 1.52 3.18 -1.66 6.29 9.49 -3.20 59,553

2045 . . . . . . 4.73 6.26 -1.54 1.51 3.42 -1.91 6.24 9.69 -3.45 73,937

2050 . . . . . . 4.69 6.24 -1.55 1.50 3.65 -2.15 6.18 9.89 -3.70 91,544

2055 . . . . . . 4.65 6.25 -1.60 1.49 3.88 -2.39 6.14 10.13 -3.99 113,245

2060 . . . . . . 4.61 6.29 -1.67 1.48 4.15 -2.67 6.09 10.44 -4.35 139,983

2065 . . . . . . 4.58 6.33 -1.75 1.47 4.46 -2.99 6.05 10.79 -4.74 173,043

2070 . . . . . . 4.54 6.36 -1.82 1.46 4.80 -3.34 6.00 11.16 -5.16 213,845

2075 . . . . . . 4.50 6.38 -1.88 1.45 5.14 -3.69 5.95 11.52 -5.56 264,319

2080 . . . . . . 4.46 6.39 -1.93 1.44 5.48 -4.04 5.90 11.88 -5.97 326,509

Summarized rates:3

25-year:

 2005-29 . . . 5.47 5.16 .31 1.60 1.93 -.33 7.07 7.09 -.02

50-year:

 2005-54 . . . 5.17 5.59 -.42 1.56 2.47 -.91 6.73 8.06 -1.33

75-year

 2005-79 . . . 5.04 5.74 -.70 1.54 2.95 -1.40 6.58 8.69 -2.10

Low Cost:

2005 . . . . . . 4.82 4.25 .57 1.45 1.41 .04 6.27 5.66 .61 12,365

2006 . . . . . . 4.89 4.18 .70 1.46 1.40 .05 6.34 5.59 .76 13,015

2007 . . . . . . 4.88 4.14 .74 1.46 1.39 .07 6.35 5.53 .81 13,677

2008 . . . . . . 4.89 4.11 .78 1.48 1.38 .10 6.37 5.49 .88 14,366

2009 . . . . . . 4.89 4.11 .77 1.47 1.37 .10 6.36 5.49 .87 15,071

2010 . . . . . . 4.89 4.12 .78 1.48 1.37 .11 6.37 5.48 .89 15,799

2011 . . . . . . 4.91 4.13 .78 1.49 1.36 .13 6.40 5.49 .90 16,552

2012 . . . . . . 4.92 4.18 .74 1.50 1.36 .13 6.41 5.54 .87 17,303

2013 . . . . . . 4.92 4.24 .68 1.50 1.37 .13 6.42 5.61 .82 18,050

2014 . . . . . . 4.92 4.30 .62 1.50 1.37 .13 6.43 5.67 .75 18,812

2015 . . . . . . 4.92 4.38 .54 1.51 1.38 .13 6.43 5.76 .67 19,599

2020 . . . . . . 4.93 4.81 .12 1.52 1.43 .09 6.45 6.24 .21 23,944

2025 . . . . . . 4.93 5.22 -.28 1.53 1.51 .02 6.47 6.73 -.26 29,065

2030 . . . . . . 4.93 5.49 -.56 1.54 1.58 -.04 6.47 7.07 -.60 35,259

2035 . . . . . . 4.92 5.56 -.64 1.54 1.64 -.10 6.45 7.19 -.74 42,962

2040 . . . . . . 4.89 5.46 -.56 1.53 1.68 -.15 6.42 7.14 -.72 52,527

2045 . . . . . . 4.87 5.34 -.47 1.52 1.74 -.22 6.39 7.07 -.68 64,311

2050 . . . . . . 4.85 5.24 -.39 1.51 1.81 -.30 6.36 7.06 -.70 78,685

2055 . . . . . . 4.83 5.19 -.36 1.51 1.93 -.42 6.33 7.12 -.78 96,274

2060 . . . . . . 4.81 5.15 -.35 1.50 2.07 -.57 6.31 7.23 -.92 117,833

2065 . . . . . . 4.79 5.11 -.33 1.49 2.24 -.74 6.28 7.35 -1.07 144,438

2070 . . . . . . 4.77 5.07 -.30 1.49 2.42 -.93 6.25 7.49 -1.23 177,162

2075 . . . . . . 4.75 5.02 -.28 1.48 2.60 -1.12 6.23 7.62 -1.40 217,350

2080 . . . . . . 4.73 5.00 -.28 1.47 2.79 -1.32 6.20 7.79 -1.59 266,448
Appendices

172

Note: Totals do not necessarily equal the sums of rounded components.

The difference between trust fund operations expressed as percentages of

taxable payroll and those expressed as percentages of GDP can be understood by analyzing the estimated ratios of OASDI taxable payroll to GDP,

which are presented in table VI.F5. HI taxable payroll is about 25 percent

larger than the OASDI taxable payroll throughout the long-range period (see

appendix VI.F.1 for a detailed description of the difference). The cost as a

Low Cost (cont.):

Summarized rates: 3

25-year:

 2005-29 . . . 5.54 4.80 0.74 1.60 1.48 0.13 7.14 6.28 0.86

50-year:

 2005-54 . . . 5.27 5.02 .26 1.57 1.57 2/1 6.84 6.59 .26

75-year

 2005-79 . . . 5.16 5.02 .14 1.55 1.73 -.18 6.71 6.75 -.04

High Cost:

2005 . . . . . . 4.89 4.41 .49 1.45 1.53 -.08 6.34 5.93 .41 $12,024

2006 . . . . . . 4.82 4.37 .45 1.46 1.57 -.11 6.28 5.94 .34 12,743

2007 . . . . . . 4.85 4.37 .47 1.47 1.61 -.14 6.31 5.98 .33 13,455

2008 . . . . . . 4.86 4.45 .41 1.48 1.67 -.19 6.34 6.12 .23 14,032

2009 . . . . . . 4.81 4.51 .30 1.47 1.71 -.24 6.28 6.22 .06 15,019

2010 . . . . . . 4.76 4.52 .24 1.47 1.75 -.28 6.24 6.28 -.04 16,366

2011 . . . . . . 4.78 4.63 .15 1.49 1.82 -.33 6.26 6.44 -.18 17,451

2012 . . . . . . 4.80 4.77 .03 1.49 1.89 -.40 6.29 6.66 -.37 18,382

2013 . . . . . . 4.80 4.88 -.09 1.50 1.97 -.47 6.30 6.85 -.56 19,334

2014 . . . . . . 4.79 5.00 -.22 1.50 2.05 -.55 6.29 7.05 -.76 20,340

2015 . . . . . . 4.78 5.11 -.33 1.50 2.13 -.63 6.29 7.25 -.96 21,391

2020 . . . . . . 4.76 5.71 -.95 1.51 2.66 -1.15 6.27 8.37 -2.10 27,419

2025 . . . . . . 4.74 6.29 -1.56 1.52 3.38 -1.86 6.25 9.67 -3.41 34,902

2030 . . . . . . 4.71 6.78 -2.07 1.52 4.24 -2.72 6.23 11.03 -4.80 44,304

2035 . . . . . . 4.67 7.07 -2.40 1.52 5.20 -3.68 6.19 12.27 -6.09 56,199

2040 . . . . . . 4.62 7.20 -2.58 1.51 6.07 -4.56 6.13 13.27 -7.14 71,099

2045 . . . . . . 4.57 7.28 -2.71 1.50 6.80 -5.31 6.07 14.08 -8.01 89,713

2050 . . . . . . 4.52 7.37 -2.85 1.48 7.39 -5.91 6.00 14.77 -8.77 112,658

2055 . . . . . . 4.47 7.50 -3.04 1.47 7.87 -6.40 5.94 15.38 -9.44 141,075

2060 . . . . . . 4.42 7.66 -3.24 1.46 8.39 -6.92 5.88 16.05 -10.16 176,324

2065 . . . . . . 4.37 7.85 -3.47 1.45 8.96 -7.51 5.83 16.81 -10.98 219,808

2070 . . . . . . 4.33 8.02 -3.70 1.44 9.60 -8.15 5.77 17.62 -11.85 273,874

2075 . . . . . . 4.28 8.17 -3.89 1.43 10.23 -8.79 5.71 18.39 -12.68 340,772

2080 . . . . . . 4.23 8.28 -4.05 1.42 10.86 -9.44 5.65 19.14 -13.49 423,931

Summarized rates: 3

25-year:

 2005-29 . . . 5.38 5.60 -.22 1.58 2.64 -1.05 6.96 8.24 -1.28

50-year:

 2005-54 . . . 5.05 6.27 -1.22 1.55 4.22 -2.67 6.60 10.49 -3.89

75-year

 2005-79 . . . 4.89 6.62 -1.73 1.53 5.39 -3.86 6.42 12.01 -5.59

1 Income for individual years excludes interest on the trust funds. Interest is implicitly reflected in all summarized values.

2 Between -0.005 and 0.005 percent of GDP.

3 Summarized rates are calculated on the present-value basis including the value of the trust funds on

January 1, 2005 and the cost of reaching a target trust fund level equal to 100 percent of annual cost at the end

of the period.

Table VI.F4.—OASDI and HI Annual and Summarized Income, Cost, and Balance 

as a Percentage of GDP, Calendar Years 2005-80 (Cont.)

Calendar year

Percentage of GDP GDP in

dollars

(billions)

OASDI HI Combined

Income1 Cost Balance Income1 Cost Balance Income1 Cost Balance
173

OASDI & HI: Percent of GDP

percentage of GDP is equal to the cost as a percentage of taxable payroll

multiplied by the ratio of taxable payroll to GDP.

Projections of GDP are based on the projected increases in U.S. employment,

labor productivity, average hours worked, and the GDP implicit price deflator. Projections of taxable payroll reflect the projected growth in GDP, along

with assumed changes in the ratio of worker compensation to GDP, the ratio

of earnings to worker compensation, the ratio of OASDI covered earnings to

total earnings, and the ratio of taxable to total covered earnings.

Over the long-range period, projected growth in taxable payroll differs from

projected growth in GDP primarily due to the assumed trend in the ratio of

wages to total employee compensation—i.e., wages plus fringe benefits. The

ratio of earnings to total worker compensation declined at an average annual

rate of 0.26 percent for the 40 years from 1963 to 2003. For the 10-year periods 1963-73, 1973-83, and 1983-93 the ratio declined by 0.39, 0.57, and

0.11 percent, respectively. For the 10-year period 1993-2003 the ratio

increased by 0.03 percent. Ultimate future annual rates of decline in the ratio

of earnings to employee compensation are assumed to be 0.1, 0.2, and

0.3 percent for the low cost, intermediate, and high cost assumptions, respectively. An additional factor that has made the overall ratio of taxable payroll

to GDP decline in recent years is the decline in the ratio of taxable wages to

covered wages, as a result of the relatively greater increases in wages for persons earning above the contribution and benefit base. This decline in the taxable ratio is assumed to continue at a slower pace through 2014, with no

further decline thereafter.

Table VI.F5.—Ratio of OASDI Taxable Payroll to GDP, Calendar Years 2005-80 

Calendar year Intermediate Low Cost High Cost

2005 . . . . . . . . . . . . . . . . . . . . . . . . . 0.383 0.383 0.384

2006 . . . . . . . . . . . . . . . . . . . . . . . . . .383 .383 .382

2007 . . . . . . . . . . . . . . . . . . . . . . . . . .382 .384 .380

2008 . . . . . . . . . . . . . . . . . . . . . . . . . .382 .384 .381

2009 . . . . . . . . . . . . . . . . . . . . . . . . . .381 .384 .378

2010 . . . . . . . . . . . . . . . . . . . . . . . . . .381 .384 .373

2011 . . . . . . . . . . . . . . . . . . . . . . . . . .380 .384 .372

2012 . . . . . . . . . . . . . . . . . . . . . . . . . .379 .383 .372

2013 . . . . . . . . . . . . . . . . . . . . . . . . . .378 .383 .371

2014 . . . . . . . . . . . . . . . . . . . . . . . . . .377 .383 .370

2015 . . . . . . . . . . . . . . . . . . . . . . . . . .377 .383 .369

2020 . . . . . . . . . . . . . . . . . . . . . . . . . .373 .381 .364

2025 . . . . . . . . . . . . . . . . . . . . . . . . . .370 .379 .359

2030 . . . . . . . . . . . . . . . . . . . . . . . . . .367 .377 .354

2035 . . . . . . . . . . . . . . . . . . . . . . . . . .363 .375 .350

2040 . . . . . . . . . . . . . . . . . . . . . . . . . .360 .374 .345

2045 . . . . . . . . . . . . . . . . . . . . . . . . . .357 .372 .340

2050 . . . . . . . . . . . . . . . . . . . . . . . . . .354 .371 .336

2055 . . . . . . . . . . . . . . . . . . . . . . . . . .350 .369 .331

2060 . . . . . . . . . . . . . . . . . . . . . . . . . .347 .368 .326

2065 . . . . . . . . . . . . . . . . . . . . . . . . . .344 .366 .321

2070 . . . . . . . . . . . . . . . . . . . . . . . . . .341 .364 .317

2075 . . . . . . . . . . . . . . . . . . . . . . . . . .338 .363 .312

2080 . . . . . . . . . . . . . . . . . . . . . . . . . .334 .361 .308
Appendices

174

3. Estimates in Dollars

This section presents long-range projections in dollars of the operations of

the combined OASI and DI Trust Funds and in some cases the HI Trust

Fund. Meaningful comparison of current dollar values over long periods of

time can be difficult because of the effect of inflation. Some means of

removing inflation is thus generally desirable. Several economic series or

indices are provided to allow current dollars to be adjusted for changes in

prices, wages, and certain other aspects of economic growth during the projection period.

The selection of a particular index for adjustment of current dollars depends

upon the analyst’s decision as to which index provides the most useful standard for adjusting dollar amounts, over time, to create values that are appropriately comparable. Table VI.F6 presents five such indices for adjustment.

Adjustment of any series of values is accomplished by dividing the value for

each year by the corresponding index values for the year. This adjustment

removes the inflation in the index from the series of values.

One of the most common forms of standardization is based on some measure

of change in the prices of consumer goods. One such price index is the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W,

hereafter referred to as CPI) which is published by the Bureau of Labor Statistics, Department of Labor. This is the index used to determine annual

increases in OASDI monthly benefits payable after the year of initial eligibility. The CPI is assumed to increase ultimately at annual rates of 1.8, 2.8, and

3.8 percent for the low cost, intermediate, and high cost sets of assumptions,

respectively. Constant-dollar values (those calculated by dividing by the

adjusted CPI in table VI.F6) indicate the relative purchasing power of the

values over time. Constant-dollar values are provided in table VI.F7.

Another type of standardization combines the effects of price inflation and

real-wage growth. The wage index presented here is the national average

wage index, as defined in section 215(i)(1)(G) of the Social Security Act.

This index is used to make annual adjustments to many earnings-related

quantities embodied in the Social Security Act, such as the contribution and

benefit base. The average annual wage is assumed to increase ultimately by

3.4, 3.9, and 4.4 percent under the low cost, intermediate, and high cost

assumptions, respectively. Wage-indexed values indicate the level of a series

relative to the standard-of-living of workers over time.

The taxable payroll index adjusts for the effects of changes in the number of

workers and changes in the proportion of earnings that are taxable, as well as
175

OASDI & HI: Estimates in Dollars

for the effects of price inflation and real-wage growth. The OASDI taxable

payroll consists of all earnings subject to OASDI taxation, adjusted for the

lower effective tax rate on multiple-employer excess wages. Values adjusted

by dividing by the taxable payroll indicate the percentage of payroll that each

value represents, and thus the extent to which the series of values increases

or decreases as a percent of payroll over time.

The GDP index adjusts for the growth in the aggregate amount of goods and

services produced in the United States. Values adjusted by GDP (see appendix VI.F.2) indicate their relative share of the total output of the economy.

No explicit assumptions are made about growth in taxable payroll or GDP.

These series are computed reflecting the other more basic demographic and

economic assumptions, as discussed in sections V.A and V.B, respectively.

Discounting at the rate of interest is another way of adjusting current dollars.

The series of interest-rate factors included here is based on the average of the

assumed annual interest rates for special public-debt obligations issuable to

the trust funds for each year. This series is slightly different from the interest

rates used to create summarized values elsewhere in this report, where the

actual yield on currently-held trust fund assets is used for each year. Ultimate

nominal interest rates, which, in practice, are compounded semiannually, are

assumed to be approximately 5.5, 5.8, and 6.0 percent for the low cost, intermediate, and high cost assumptions, respectively.
Appendices

176

Table VI.F6.—Selected Economic Variables, Calendar Years 2004-80

[GDP and taxable payroll in billions]

Calendar year

Adjusted

CPI1 Average

wage index2 Taxablepayroll3

Gross

domestic

product

Compound

interest-rate

factor4

Intermediate:

2004 . . . . . . . . . . . . . 97.89 $35,157.10 $4,501 $11,736 0.9593

2005 . . . . . . . . . . . . . 100.00 36,599.68 4,730 12,359 1.0000

2006 . . . . . . . . . . . . . 102.15 38,137.06 4,985 13,020 1.0517

2007 . . . . . . . . . . . . . 104.81 39,793.49 5,244 13,710 1.1104

2008 . . . . . . . . . . . . . 107.73 41,463.08 5,511 14,424 1.1738

2009 . . . . . . . . . . . . . 110.74 43,155.26 5,784 15,160 1.2407

2010 . . . . . . . . . . . . . 113.85 44,893.85 6,065 15,926 1.3130

2011 . . . . . . . . . . . . . 117.04 46,702.32 6,354 16,721 1.3896

2012 . . . . . . . . . . . . . 120.32 48,631.78 6,646 17,534 1.4706

2013 . . . . . . . . . . . . . 123.69 50,572.35 6,946 18,369 1.5564

2014 . . . . . . . . . . . . . 127.16 52,532.90 7,258 19,232 1.6472

2015 . . . . . . . . . . . . . 130.72 54,541.35 7,583 20,127 1.7432

2020 . . . . . . . . . . . . . 150.07 65,840.13 9,391 25,150 2.3145

2025 . . . . . . . . . . . . . 172.29 79,691.99 11,545 31,204 3.0729

2030 . . . . . . . . . . . . . 197.80 96,459.53 14,166 38,644 4.0799

2035 . . . . . . . . . . . . . 227.09 116,905.09 17,418 47,952 5.4169

2040 . . . . . . . . . . . . . 260.71 141,781.99 21,442 59,553 7.1920

2045 . . . . . . . . . . . . . 299.31 171,914.99 26,386 73,937 9.5487

2050 . . . . . . . . . . . . . 343.63 208,270.86 32,374 91,544 12.6778

2055 . . . . . . . . . . . . . 394.51 252,176.38 39,682 113,245 16.8323

2060 . . . . . . . . . . . . . 452.92 305,340.62 48,600 139,983 22.3481

2065 . . . . . . . . . . . . . 519.98 369,738.42 59,520 173,043 29.6715

2070 . . . . . . . . . . . . . 596.97 447,862.37 72,868 213,845 39.3947

2075 . . . . . . . . . . . . . 685.36 542,526.74 89,221 264,319 52.3042

2080 . . . . . . . . . . . . . 786.84 657,144.53 109,174 326,509 69.4440

Low Cost:

2004 . . . . . . . . . . . . . 98.06 35,134.22 4,499 11,730 .9594

2005 . . . . . . . . . . . . . 100.00 36,563.32 4,736 12,365 1.0000

2006 . . . . . . . . . . . . . 101.74 38,029.05 4,990 13,015 1.0496

2007 . . . . . . . . . . . . . 103.57 39,563.07 5,250 13,677 1.1035

2008 . . . . . . . . . . . . . 105.42 41,062.34 5,517 14,366 1.1613

2009 . . . . . . . . . . . . . 107.33 42,565.55 5,788 15,071 1.2231

2010 . . . . . . . . . . . . . 109.26 44,101.67 6,067 15,799 1.2896

2011 . . . . . . . . . . . . . 111.23 45,678.34 6,352 16,552 1.3599

2012 . . . . . . . . . . . . . 113.23 47,325.89 6,633 17,303 1.4352

2013 . . . . . . . . . . . . . 115.28 48,954.25 6,916 18,050 1.5153

2014 . . . . . . . . . . . . . 117.35 50,604.20 7,206 18,812 1.5998

2015 . . . . . . . . . . . . . 119.46 52,300.94 7,501 19,599 1.6889

2020 . . . . . . . . . . . . . 130.60 61,627.88 9,121 23,944 2.2153

2025 . . . . . . . . . . . . . 142.79 72,779.82 11,017 29,065 2.9057

2030 . . . . . . . . . . . . . 156.11 85,904.09 13,300 35,259 3.8113

2035 . . . . . . . . . . . . . 170.68 101,531.84 16,129 42,962 4.9991

2040 . . . . . . . . . . . . . 186.60 120,124.63 19,637 52,527 6.5570

2045 . . . . . . . . . . . . . 204.01 142,117.25 23,942 64,311 8.6005

2050 . . . . . . . . . . . . . 223.04 168,062.48 29,169 78,685 11.2809

2055 . . . . . . . . . . . . . 243.85 198,755.21 35,539 96,274 14.7966

2060 . . . . . . . . . . . . . 266.60 235,077.34 43,314 117,833 19.4080

2065 . . . . . . . . . . . . . 291.48 278,079.27 52,868 144,438 25.4565

2070 . . . . . . . . . . . . . 318.67 329,042.59 64,568 177,162 33.3901

2075 . . . . . . . . . . . . . 348.40 389,387.51 78,872 217,350 43.7961

2080 . . . . . . . . . . . . . 380.91 460,704.81 96,265 266,448 57.4452
177

OASDI & HI: Estimates in Dollars

Table VI.F7 shows estimated operations of the combined OASI and DI Trust

Funds in constant 2005 dollars (i.e., adjusted by the CPI indexing series as

discussed above). Items included in the table are: income excluding interest,

interest income, total income, total cost, and assets at the end of the year.

Income excluding interest consists of payroll-tax contributions, income from

taxation of benefits, and miscellaneous reimbursements from the General

Fund of the Treasury. Cost consists of benefit payments, administrative

expenses, net transfers from the OASI and DI Trust Funds to the Railroad

Retirement program under the financial-interchange provisions, and payments for vocational rehabilitation services for disabled beneficiaries. These

High Cost:

2004 . . . . . . . . . . . . . 97.40 $35,067.38 $4,489 $11,698 0.9641

2005 . . . . . . . . . . . . . 100.00 35,921.47 4,619 12,024 1.0000

2006 . . . . . . . . . . . . . 102.61 37,716.79 4,873 12,743 1.0581

2007 . . . . . . . . . . . . . 105.50 39,428.35 5,117 13,455 1.1198

2008 . . . . . . . . . . . . . 110.12 40,860.58 5,342 14,032 1.1877

2009 . . . . . . . . . . . . . 116.40 43,485.07 5,672 15,019 1.2834

2010 . . . . . . . . . . . . . 122.87 46,602.64 6,102 16,366 1.3973

2011 . . . . . . . . . . . . . 128.63 49,154.43 6,491 17,451 1.4987

2012 . . . . . . . . . . . . . 133.70 51,426.51 6,841 18,382 1.5927

2013 . . . . . . . . . . . . . 138.78 53,679.36 7,180 19,334 1.6897

2014 . . . . . . . . . . . . . 144.05 55,992.55 7,526 20,340 1.7926

2015 . . . . . . . . . . . . . 149.52 58,408.36 7,895 21,391 1.9017

2020 . . . . . . . . . . . . . 180.17 72,262.69 9,987 27,419 2.5558

2025 . . . . . . . . . . . . . 217.11 89,681.30 12,543 34,902 3.4348

2030 . . . . . . . . . . . . . 261.61 111,347.32 15,705 44,304 4.6160

2035 . . . . . . . . . . . . . 315.24 138,391.35 19,653 56,199 6.2036

2040 . . . . . . . . . . . . . 379.87 172,065.34 24,531 71,099 8.3371

2045 . . . . . . . . . . . . . 457.74 213,796.38 30,534 89,713 11.2043

2050 . . . . . . . . . . . . . 551.58 265,329.62 37,811 112,658 15.0576

2055 . . . . . . . . . . . . . 664.65 328,881.66 46,678 141,075 20.2362

2060 . . . . . . . . . . . . . 800.90 407,549.67 57,510 176,324 27.1958

2065 . . . . . . . . . . . . . 965.08 504,898.52 70,665 219,808 36.5489

2070 . . . . . . . . . . . . . 1,162.93 625,883.88 86,779 273,874 49.1186

2075 . . . . . . . . . . . . . 1,401.33 775,802.04 106,419 340,772 66.0113

2080 . . . . . . . . . . . . . 1,688.60 961,844.29 130,479 423,931 88.7137

1The adjusted CPI is the CPI-W indexed to calendar year 2005. 2 The average wage index is used to automatically adjust the contribution and benefit base and other wageindexed program amounts. (See “Average wage index” in the glossary.) 3 Taxable payroll consists of total earnings subject to OASDI contribution rates, adjusted to include deemed

wages based on military service through calendar year 2001 and to reflect the lower effective contribution

rates (compared to the combined employee-employer rate) which apply to multiple-employer “excess

wages.”

4 The compound interest-rate factor is based on the average of the assumed annual interest rates for special

public-debt obligations issuable to the trust funds in the 12 months of the year, under each alternative.

Table VI.F6.—Selected Economic Variables, Calendar Years 2004-80 (Cont.)

[GDP and taxable payroll in billions]

Calendar year

Adjusted

CPI1 Average

wage index2 Taxablepayroll3

Gross

domestic

product

Compound

interest-rate

factor4
Appendices

178

estimates are based on the low cost, intermediate, and high cost sets of

assumptions.

Table VI.F7.—Operations of the Combined OASI and DI Trust Funds, 

in Constant 2005 Dollars,1 Calendar Years 2005-80

[In billions]

Calendar year

Income

excluding

interest

Interest

income

Total

income Cost

Assets at

end of year

Intermediate:

2005 . . . . . . . . . . . . . $596.1 $93.8 $689.9 $526.6 $1,850.1

2006 . . . . . . . . . . . . . 621.5 98.7 720.3 536.7 1,994.7

2007 . . . . . . . . . . . . . 636.4 106.0 742.4 547.7 2,138.8

2008 . . . . . . . . . . . . . 652.3 114.1 766.4 562.1 2,285.1

2009 . . . . . . . . . . . . . 665.1 122.2 787.4 581.1 2,429.3

2010 . . . . . . . . . . . . . 679.6 130.7 810.3 599.4 2,573.8

2011 . . . . . . . . . . . . . 695.7 139.5 835.2 620.1 2,718.6

2012 . . . . . . . . . . . . . 709.9 147.9 857.8 644.6 2,857.8

2013 . . . . . . . . . . . . . 723.0 156.2 879.1 670.1 2,989.0

2014 . . . . . . . . . . . . . 735.6 164.0 899.6 697.1 3,110.0

2015 . . . . . . . . . . . . . 748.8 172.1 920.8 724.5 3,221.6

2020 . . . . . . . . . . . . . 813.7 201.9 1,015.6 877.9 3,584.0

2025 . . . . . . . . . . . . . 877.4 199.6 1,077.0 1,041.7 3,489.8

2030 . . . . . . . . . . . . . 943.1 166.6 1,109.7 1,199.0 2,847.2

2035 . . . . . . . . . . . . . 1,013.6 104.0 1,117.7 1,332.6 1,689.2

20402 . . . . . . . . . . . . 1,088.3 17.0 1,105.3 1,440.8 104.6

Low Cost: 

2005 . . . . . . . . . . . . . 596.0 93.8 689.8 525.0 1,851.6

2006 . . . . . . . . . . . . . 625.0 98.8 723.8 534.8 2,009.0

2007 . . . . . . . . . . . . . 644.5 106.0 750.5 546.5 2,177.4

2008 . . . . . . . . . . . . . 666.9 114.4 781.3 560.0 2,360.5

2009 . . . . . . . . . . . . . 686.2 123.6 809.7 577.6 2,550.7

2010 . . . . . . . . . . . . . 707.5 133.6 841.1 595.0 2,751.6

2011 . . . . . . . . . . . . . 730.5 144.7 875.1 614.9 2,963.1

2012 . . . . . . . . . . . . . 751.3 156.3 907.5 638.4 3,179.9

2013 . . . . . . . . . . . . . 770.4 168.6 939.0 663.4 3,399.2

2014 . . . . . . . . . . . . . 789.1 181.0 970.1 689.9 3,619.5

2015 . . . . . . . . . . . . . 807.9 194.1 1,002.0 718.5 3,839.0

2020 . . . . . . . . . . . . . 904.0 257.9 1,161.9 882.2 4,882.2

2025 . . . . . . . . . . . . . 1,004.2 304.6 1,308.8 1,062.1 5,724.7

2030 . . . . . . . . . . . . . 1,113.3 337.8 1,451.2 1,239.5 6,317.4

2035 . . . . . . . . . . . . . 1,237.3 361.7 1,599.0 1,398.7 6,750.5

2040 . . . . . . . . . . . . . 1,377.6 385.8 1,763.4 1,536.5 7,205.3

2045 . . . . . . . . . . . . . 1,535.3 417.7 1,953.0 1,682.1 7,811.6

2050 . . . . . . . . . . . . . 1,710.4 458.9 2,169.3 1,849.7 8,593.6

2055 . . . . . . . . . . . . . 1,906.1 509.2 2,415.2 2,049.4 9,539.5

2060 . . . . . . . . . . . . . 2,125.1 567.1 2,692.2 2,278.3 10,627.1

2065 . . . . . . . . . . . . . 2,372.5 633.9 3,006.5 2,534.4 11,884.5

2070 . . . . . . . . . . . . . 2,650.1 711.9 3,362.0 2,817.5 13,354.2

2075 . . . . . . . . . . . . . 2,960.5 804.2 3,764.7 3,133.9 15,093.5

2080 . . . . . . . . . . . . . 3,305.5 911.0 4,216.5 3,500.8 17,100.6
179

OASDI & HI: Estimates in Dollars

Note: Totals do not necessarily equal the sums of rounded components.

Figure VI.F1 provides a comparison of annual cost with total annual income

(including interest) and annual income excluding interest, for the OASDI

program under intermediate assumptions. All values are expressed in constant dollars, as shown in table VI.F7. The difference between the income

values for each year is equal to the trust fund interest earnings. Thus the figure illustrates the fact that, under intermediate assumptions, combined

OASDI cost will be payable from (1) current tax income alone through 2016,

(2) current tax income plus amounts from the trust funds that are less than

annual interest income for years 2017 through 2026, and (3) current tax

income plus amounts from the trust funds that are greater than annual interest

income for years 2027 through 2040, i.e., through the year preceding the year

of trust fund exhaustion.

High Cost:

2005 . . . . . . . . . . . . . $588.2 $92.2 $680.4 $529.7 $1,837.5

2006 . . . . . . . . . . . . . 598.6 96.1 694.7 543.0 1,942.5

2007 . . . . . . . . . . . . . 618.0 102.8 720.8 557.9 2,052.0

2008 . . . . . . . . . . . . . 619.9 108.3 728.3 567.2 2,127.1

2009 . . . . . . . . . . . . . 620.8 115.5 736.3 582.2 2,166.4

2010 . . . . . . . . . . . . . 634.7 128.4 763.1 602.3 2,213.1

2011 . . . . . . . . . . . . . 648.2 136.1 784.3 627.6 2,270.7

2012 . . . . . . . . . . . . . 659.3 140.1 799.4 655.7 2,328.3

2013 . . . . . . . . . . . . . 668.2 142.9 811.1 680.5 2,373.6

2014 . . . . . . . . . . . . . 675.7 145.2 820.9 706.5 2,401.4

2015 . . . . . . . . . . . . . 684.1 145.1 829.2 731.5 2,411.1

2020 . . . . . . . . . . . . . 724.5 127.9 852.4 868.9 2,143.4

2025 2 . . . . . . . . . . . . 761.4 81.8 843.1 1,011.4 1,284.1

1The adjustment from current to constant dollars is by the adjusted CPI indexing series shown in table

VI.F6.

2 Estimates for later years are not shown because the combined OASI and DI Trust Funds are estimated to

become exhausted in 2041 under the intermediate assumptions and in 2030 under the high cost assumptions.

Table VI.F7.—Operations of the Combined OASI and DI Trust Funds, 

in Constant 2005 Dollars,1 Calendar Years 2005-80 (Cont.)

[In billions]

Calendar year

Income

excluding

interest

Interest

income

Total

income Cost

Assets at

end of year
Appendices

180

Table VI.F8 shows estimated operations of the combined OASI and DI Trust

Funds in current dollars—that is in dollars unadjusted for price inflation.

Items included in the table are: income excluding interest, interest income,

total income, total cost, and assets at the end of the year. These estimates,

based on the low cost, intermediate, and high cost sets of demographic and

economic assumptions, are presented to facilitate independent analysis.

 Figure VI.F1.—Estimated OASDI Income and Cost in Constant Dollars,

Based on Intermediate Assumptions

[In billions]

$0

$200

$400

$600

$800

$1,000

$1,200

$1,400

$1,600

2005 2010 2015 2020 2025 2030 2035 2040 2045

Calendar year

Cost

Total income

Income excluding interest
181

OASDI & HI: Estimates in Dollars

Table VI.F8.—Operations of the Combined OASI and DI Trust Funds, 

in Current Dollars, Calendar Years 2005-80

[In billions]

Calendar year

Income

excluding

interest

Interest

income

Total

income Cost

Assets at

end of year

Intermediate:

2005 . . . . . . . . . . . . . $596.1 $93.8 $689.9 $526.6 $1,850.1

2006 . . . . . . . . . . . . . 634.9 100.8 735.8 548.2 2,037.7

2007 . . . . . . . . . . . . . 667.0 111.1 778.1 574.1 2,241.7

2008 . . . . . . . . . . . . . 702.7 122.9 825.6 605.5 2,461.8

2009 . . . . . . . . . . . . . 736.6 135.4 871.9 643.5 2,690.2

2010 . . . . . . . . . . . . . 773.8 148.7 922.5 682.4 2,930.3

2011 . . . . . . . . . . . . . 814.3 163.2 977.5 725.8 3,182.0

2012 . . . . . . . . . . . . . 854.1 178.0 1,032.1 775.6 3,438.6

2013 . . . . . . . . . . . . . 894.3 193.1 1,087.4 828.9 3,697.1

2014 . . . . . . . . . . . . . 935.4 208.5 1,143.9 886.4 3,954.6

2015 . . . . . . . . . . . . . 978.7 224.9 1,203.7 947.1 4,211.1

2020 . . . . . . . . . . . . . 1,221.2 303.0 1,524.2 1,317.5 5,378.5

2025 . . . . . . . . . . . . . 1,511.7 343.9 1,855.5 1,794.8 6,012.6

2030 . . . . . . . . . . . . . 1,865.6 329.4 2,195.0 2,371.7 5,631.9

2035 . . . . . . . . . . . . . 2,301.8 236.3 2,538.1 3,026.1 3,836.0

20401 . . . . . . . . . . . . 2,837.3 44.3 2,881.6 3,756.2 272.7

Low Cost:

2005 . . . . . . . . . . . . . 596.0 93.8 689.8 525.0 1,851.6

2006 . . . . . . . . . . . . . 635.8 100.5 736.4 544.1 2,043.9

2007 . . . . . . . . . . . . . 667.5 109.8 777.3 566.0 2,255.2

2008 . . . . . . . . . . . . . 703.0 120.6 823.7 590.4 2,488.5

2009 . . . . . . . . . . . . . 736.5 132.6 869.1 620.0 2,737.6

2010 . . . . . . . . . . . . . 773.0 146.0 919.0 650.2 3,006.5

2011 . . . . . . . . . . . . . 812.5 160.9 973.4 684.0 3,296.0

2012 . . . . . . . . . . . . . 850.7 177.0 1,027.7 722.9 3,600.7

2013 . . . . . . . . . . . . . 888.1 194.4 1,082.5 764.7 3,918.5

2014 . . . . . . . . . . . . . 926.0 212.4 1,138.4 809.6 4,247.4

. 2015 . . . . . . . . . . . . . 965.1 231.9 1,197.0 858.4 4,586.0

2020 . . . . . . . . . . . . . 1,180.6 336.8 1,517.4 1,152.1 6,376.4

2025 . . . . . . . . . . . . . 1,433.9 434.9 1,868.8 1,516.5 8,174.2

2030 . . . . . . . . . . . . . 1,738.0 527.4 2,265.4 1,935.0 9,862.1

2035 . . . . . . . . . . . . . 2,111.7 617.4 2,729.1 2,387.2 11,521.5

2040 . . . . . . . . . . . . . 2,570.6 720.0 3,290.5 2,867.0 13,445.0

2045 . . . . . . . . . . . . . 3,132.2 852.1 3,984.4 3,431.6 15,936.5

2050 . . . . . . . . . . . . . 3,814.9 1,023.7 4,838.5 4,125.6 19,167.4

2055 . . . . . . . . . . . . . 4,648.0 1,241.6 5,889.6 4,997.5 23,262.3

2060 . . . . . . . . . . . . . 5,665.7 1,511.8 7,177.5 6,074.0 28,332.1

2065 . . . . . . . . . . . . . 6,915.4 1,847.7 8,763.2 7,387.2 34,640.8

2070 . . . . . . . . . . . . . 8,445.2 2,268.6 10,713.8 8,978.7 42,556.1

2075 . . . . . . . . . . . . . 10,314.6 2,801.7 13,116.3 10,918.6 52,586.2

2080 . . . . . . . . . . . . . 12,590.9 3,470.1 16,061.0 13,335.1 65,137.6
Appendices

182

Note: Totals do not necessarily equal the sums of rounded components.

Table VI.F9 shows, in current dollars, estimated income (excluding interest)

and estimated total cost (excluding the cost of accumulating target trust fund

balances) of the combined OASI and DI Trust Funds, of the HI Trust Fund,

and of the combined OASI, DI, and HI Trust Funds, based on the low cost,

intermediate, and high cost sets of assumptions described earlier in this

report. For OASDI, income excluding interest consists of payroll-tax contributions, proceeds from taxation of OASDI benefits, and miscellaneous transfers from the General Fund of the Treasury. Cost consists of benefit

payments, administrative expenses, net transfers from the trust funds to the

Railroad Retirement program, and payments for vocational rehabilitation

services for disabled beneficiaries. For HI, income excluding interest consists of payroll-tax contributions (including contributions from railroad

employment) and proceeds from the taxation of OASDI benefits. Total cost

consists of outlays (scheduled benefits and administrative expenses) for

insured beneficiaries. Income and cost estimates are shown on a cash basis

for the OASDI program and on an incurred basis for the HI program.

Table VI.F9 also shows the difference between income excluding interest

and cost, which is called the balance. The balance indicates the size of the

difference between tax income and cost.

High Cost:

2005 . . . . . . . . . . . . . $588.2 $92.2 $680.4 $529.7 $1,837.5

2006 . . . . . . . . . . . . . 614.2 98.6 712.8 557.1 1,993.1

2007 . . . . . . . . . . . . . 652.0 108.4 760.5 588.6 2,165.0

2008 . . . . . . . . . . . . . 682.6 119.3 802.0 624.6 2,342.3

2009 . . . . . . . . . . . . . 722.6 134.5 857.1 677.7 2,521.7

2010 . . . . . . . . . . . . . 779.8 157.8 937.6 740.1 2,719.2

2011 . . . . . . . . . . . . . 833.8 175.1 1,008.9 807.3 2,920.8

2012 . . . . . . . . . . . . . 881.5 187.2 1,068.7 876.6 3,112.9

2013 . . . . . . . . . . . . . 927.3 198.4 1,125.7 944.4 3,294.2

2014 . . . . . . . . . . . . . 973.4 209.1 1,182.5 1,017.6 3,459.1

2015 . . . . . . . . . . . . . 1,022.9 216.9 1,239.8 1,093.7 3,605.1

2020 . . . . . . . . . . . . . 1,305.3 230.5 1,535.8 1,565.5 3,861.8

2025 1 . . . . . . . . . . . . 1,653.0 177.5 1,830.5 2,195.9 2,787.9

1 Estimates for later years are not shown because the combined OASI and DI Trust Funds are estimated to

become exhausted in 2041 under the intermediate assumptions and in 2030 under the high cost assumptions.

Table VI.F8.—Operations of the Combined OASI and DI Trust Funds, 

in Current Dollars, Calendar Years 2005-80 (Cont.)

[In billions]

Calendar year

Income

excluding

interest

Interest

income

Total

income Cost

Assets at

end of year
183

OASDI & HI: Estimates in Dollars

Table VI.F9.—OASDI and HI Annual Income Excluding Interest, Cost, and

Balance in Current Dollars, Calendar Years 2005-80

[In billions]

Calendar

year

OASDI HI Combined

Income

excluding

interest Cost Balance

Income

excluding

interest Cost Balance

Income

excluding

interest Cost Balance

Intermediate:

2005 . . . . . . $596 $527 $69 $179 $179 1/ $775 $706 $69

2006 . . . . . . 635 548 87 190 191 -$1 825 739 85

2007 . . . . . . 667 574 93 201 203 -2 868 777 91

2008 . . . . . . 703 606 97 213 216 -3 916 822 94

2009 . . . . . . 737 643 93 223 230 -7 960 873 87

2010 . . . . . . 774 682 91 235 245 -9 1,009 927 82

2011 . . . . . . 814 726 88 249 261 -12 1,064 987 77

2012 . . . . . . 854 776 79 263 279 -17 1,117 1,055 62

2013 . . . . . . 894 829 65 276 299 -23 1,171 1,128 43

2014 . . . . . . 935 886 49 290 319 -30 1,225 1,206 19

2015 . . . . . . 979 947 32 304 342 -39 1,282 1,289 -7

2020 . . . . . . 1,221 1,318 -96 382 487 -104 1,603 1,804 -201

2025 . . . . . . 1,512 1,795 -283 477 700 -223 1,989 2,495 -506

2030 . . . . . . 1,866 2,372 -506 593 995 -402 2,458 3,366 -908

2035 . . . . . . 2,302 3,026 -724 734 1,392 -658 3,036 4,418 -1,382

2040 . . . . . . 2,837 3,756 -919 906 1,896 -989 3,744 5,652 -1,908

2045 . . . . . . 3,494 4,630 -1,137 1,116 2,532 -1,415 4,610 7,162 -2,552

2050 . . . . . . 4,290 5,712 -1,422 1,372 3,339 -1,967 5,662 9,051 -3,389

2055 . . . . . . 5,264 7,081 -1,816 1,686 4,393 -2,707 6,950 11,474 -4,524

2060 . . . . . . 6,456 8,799 -2,343 2,071 5,812 -3,741 8,527 14,610 -6,083

2065 . . . . . . 7,918 10,950 -3,032 2,544 7,714 -5,170 10,462 18,664 -8,202

2070 . . . . . . 9,707 13,608 -3,901 3,124 10,258 -7,134 12,831 23,866 -11,035

2075 . . . . . . 11,897 16,862 -4,964 3,834 13,576 -9,742 15,732 30,438 -14,706

2080 . . . . . . 14,573 20,879 -6,306 4,703 17,902 -13,200 19,275 38,781 -19,506

Low Cost:

2005 . . . . . . 596 525 71 179 174 5 775 699 75

2006 . . . . . . 636 544 92 190 183 7 826 727 99

2007 . . . . . . 667 566 101 200 190 10 868 756 111

2008 . . . . . . 703 590 113 212 199 14 915 789 126

2009 . . . . . . 736 620 117 222 207 15 958 827 132

2010 . . . . . . 773 650 123 233 216 17 1,006 866 140

2011 . . . . . . 813 684 129 247 225 21 1,059 909 150

2012 . . . . . . 851 723 128 259 236 23 1,110 959 151

2013 . . . . . . 888 765 123 271 247 24 1,159 1,012 147

2014 . . . . . . 926 810 116 283 258 25 1,209 1,067 142

2015 . . . . . . 965 858 107 296 270 25 1,261 1,129 132

2020 . . . . . . 1,181 1,152 29 364 342 22 1,545 1,494 51

2025 . . . . . . 1,434 1,517 -83 445 438 7 1,879 1,955 -76

2030 . . . . . . 1,738 1,935 -197 542 556 -14 2,280 2,492 -211

2035 . . . . . . 2,112 2,387 -275 660 703 -42 2,772 3,090 -318

2040 . . . . . . 2,571 2,867 -296 803 885 -81 3,374 3,752 -378

2045 . . . . . . 3,132 3,432 -299 978 1,118 -140 4,110 4,549 -439

2050 . . . . . . 3,815 4,126 -311 1,191 1,427 -237 5,005 5,553 -547

2055 . . . . . . 4,648 4,997 -349 1,450 1,855 -404 6,098 6,852 -754

2060 . . . . . . 5,666 6,074 -408 1,768 2,441 -673 7,434 8,515 -1,081

2065 . . . . . . 6,915 7,387 -472 2,158 3,229 -1,071 9,074 10,616 -1,542

2070 . . . . . . 8,445 8,979 -533 2,635 4,283 -1,647 11,080 13,261 -2,181

2075 . . . . . . 10,315 10,919 -604 3,218 5,653 -2,435 13,533 16,572 -3,039

2080 . . . . . . 12,591 13,335 -744 3,929 7,434 -3,505 16,520 20,769 -4,249
Appendices

184

Note: Totals do not necessarily equal the sums of rounded components.

Table VI.F10 shows projected future benefit amounts payable upon retirement at either the normal retirement age (NRA) or age 65, for workers attaining age 65 in 2005 and subsequent years. Illustrative benefit levels are shown

for workers with four separate pre-retirement earnings patterns. All estimates

are based on the intermediate assumptions in this report. The benefit amounts

are shown in constant 2005 dollars (adjusted to 2005 levels by the CPI indexing series shown in table VI.F6). Benefit amounts are also shown as percentages of the general, career-average relative earnings level for each case,

wage indexed to the year prior to retirement. These percentages thus represent the benefit “replacement rate” of the career-average level of earnings.

The normal retirement age is 65 for individuals who reached age 62 before

2000 and is scheduled to increase to age 66 during the period 2000-05 (at a

rate of 2 months per year as workers attain age 62) and to age 67 during the

period 2017-22 (also by 2 months per year as workers attain age 62). Thus,

for illustrative cases attaining age 65 after 2002, benefit levels shown for

High Cost:

2005 . . . . . . $588 $530 $58 $174 $183 -$10 $762 $713 $49

2006 . . . . . . 614 557 57 186 200 -14 800 757 43

2007 . . . . . . 652 589 63 197 216 -19 849 805 44

2008 . . . . . . 683 625 58 207 234 -26 890 858 32

2009 . . . . . . 723 678 45 221 257 -36 943 935 8

2010 . . . . . . 780 740 40 241 287 -46 1,021 1,027 -6

2011 . . . . . . 834 807 27 259 317 -58 1,093 1,124 -31

2012 . . . . . . 881 877 5 274 347 -73 1,156 1,224 -68

2013 . . . . . . 927 944 -17 290 381 -91 1,217 1,325 -108

2014 . . . . . . 973 1,018 -44 305 416 -111 1,279 1,434 -155

2015 . . . . . . 1,023 1,094 -71 322 456 -135 1,344 1,550 -206

2020 . . . . . . 1,305 1,566 -260 415 729 -314 1,720 2,295 -575

2025 . . . . . . 1,653 2,196 -543 530 1,178 -648 2,183 3,374 -1,191

2030 . . . . . . 2,086 3,005 -919 674 1,880 -1,206 2,760 4,885 -2,125

2035 . . . . . . 2,624 3,975 -1,351 854 2,922 -2,069 3,477 6,897 -3,420

2040 . . . . . . 3,286 5,118 -1,832 1,073 4,314 -3,242 4,359 9,432 -5,074

2045 . . . . . . 4,100 6,529 -2,429 1,342 6,103 -4,761 5,442 12,632 -7,190

2050 . . . . . . 5,091 8,306 -3,215 1,671 8,331 -6,660 6,762 16,637 -9,875

2055 . . . . . . 6,304 10,586 -4,282 2,077 11,108 -9,031 8,381 21,694 -13,312

2060 . . . . . . 7,795 13,505 -5,710 2,578 14,786 -12,208 10,373 28,291 -17,918

2065 . . . . . . 9,615 17,249 -7,633 3,194 19,697 -16,503 12,809 36,945 -24,136

2070 . . . . . . 11,854 21,976 -10,122 3,955 26,281 -22,326 15,809 48,257 -32,448

2075 . . . . . . 14,587 27,840 -13,252 4,886 34,845 -29,959 19,473 62,685 -43,211

2080 . . . . . . 17,939 35,095 -17,156 6,030 46,052 -40,022 23,970 81,147 -57,178

1 Between -$500 million and $500 million.

Table VI.F9.—OASDI and HI Annual Income Excluding Interest, Cost, and

Balance in Current Dollars, Calendar Years 2005-80 (Cont.)

[In billions]

Calendar

year

OASDI HI Combined

Income

excluding

interest Cost Balance

Income

excluding

interest Cost Balance

Income

excluding

interest Cost Balance
185

OASDI & HI: Estimates in Dollars

retirement at 65 are lower than the levels shown for retirement at NRA, primarily because of the actuarial reduction for “early” (pre-NRA) retirement.

Four different pre-retirement earnings patterns are represented in table

VI.F10. Three of these patterns are for workers with scaled-earnings patterns,1 reflecting low, medium, and high career-average levels of pre-retirement earnings starting at age 21. The fourth case is the steady maximum

earner. The three scaled-earnings cases have earnings patterns that reflect

differences by age in the probability of work and in average earnings levels

experienced by insured workers during the period 1991-2001. The general,

career-average level of earnings for the scaled cases is set relative to the

national average wage index (AWI) so that benefit levels are consistent with

levels for “steady-earnings” cases that were shown in the 2000 and earlier

Trustees Reports. For the scaled medium earner, the general, career-average

earnings level is about equal to the AWI. For the scaled low and high earners,

the general, career-average earnings level is set at about 45 percent and 160

percent of the AWI, respectively. The steady maximum earner is assumed to

have earnings at (or above) the OASDI contribution and benefit base for

each year prior to retirement starting at age 22.

As noted above, the scaled-earnings cases were constructed so that their

career-average earnings levels are consistent with those of the corresponding

steady low, average, and high earners that were illustrated in the 2000 and

earlier Trustees Reports. As a result, values in this table for benefits under

the present-law Social Security benefit formula are essentially comparable to

those in earlier reports. Scaled-earnings cases are now being used instead of

steady-earnings cases because they more accurately illustrate the differences

in benefit levels under the wide variety of reform proposals considered in

recent years.

 1 More details are provided on scaled-earnings patterns in the Social Security Administration Actuarial Note

Number 2004.3, located at the following internet address: www.socialsecurity.gov/OACT/NOTES/ran3/

an2004-3.html.
Appendices

186

Table VI.F10.—Estimated Annual Scheduled Benefit Amounts1 for Retired Workers

With Various Pre-Retirement Earnings Patterns Based on

Intermediate Assumptions, Calendar Years 2005-80 

Year attain age 652

Retirement at normal retirement age Retirement at age 65

Age at

retirement

Constant

2005

dollars 3 Percent of

earnings

Age at

retirement

Constant

2005

dollars3 Percent ofearnings

 Scaled low earnings:4

2005 . . . . . . . . . . . 65:6 $9,305 58.3 65:0 $9,003 56.9

2010 . . . . . . . . . . . 66:0 9,516 55.1 65:0 8,885 52.1

2015 . . . . . . . . . . . 66:0 10,177 55.7 65:0 9,496 52.5

2020 . . . . . . . . . . . 66:2 10,774 56.0 65:0 9,931 52.2

2025 . . . . . . . . . . . 67:0 11,329 55.4 65:0 9,816 49.0

2030 . . . . . . . . . . . 67:0 11,945 55.4 65:0 10,350 49.0

2035 . . . . . . . . . . . 67:0 12,590 55.3 65:0 10,911 48.9

2040 . . . . . . . . . . . 67:0 13,298 55.3 65:0 11,520 48.9

2045 . . . . . . . . . . . 67:0 14,047 55.3 65:0 12,172 48.9

2050 . . . . . . . . . . . 67:0 14,835 55.4 65:0 12,857 49.0

2055 . . . . . . . . . . . 67:0 15,654 55.4 65:0 13,564 49.0

2060 . . . . . . . . . . . 67:0 16,510 55.4 65:0 14,309 49.0

2065 . . . . . . . . . . . 67:0 17,412 55.4 65:0 15,091 49.0

2070 . . . . . . . . . . . 67:0 18,368 55.3 65:0 15,917 49.0

2075 . . . . . . . . . . . 67:0 19,379 55.3 65:0 16,795 49.0

2080 . . . . . . . . . . . 67:0 20,448 55.3 65:0 17,722 49.0

Scaled medium earnings:5

2005 . . . . . . . . . . . 65:6 15,335 43.2 65:0 14,833 42.2

2010 . . . . . . . . . . . 66:0 15,692 40.9 65:0 14,643 38.6

2015 . . . . . . . . . . . 66:0 16,774 41.3 65:0 15,652 38.9

2020 . . . . . . . . . . . 66:2 17,752 41.5 65:0 16,366 38.7

2025 . . . . . . . . . . . 67:0 18,662 41.1 65:0 16,175 36.3

2030 . . . . . . . . . . . 67:0 19,679 41.1 65:0 17,056 36.3

2035 . . . . . . . . . . . 67:0 20,745 41.0 65:0 17,977 36.3

2040 . . . . . . . . . . . 67:0 21,907 41.0 65:0 18,985 36.3

2045 . . . . . . . . . . . 67:0 23,139 41.0 65:0 20,056 36.3

2050 . . . . . . . . . . . 67:0 24,440 41.0 65:0 21,180 36.3

2055 . . . . . . . . . . . 67:0 25,789 41.1 65:0 22,351 36.3

2060 . . . . . . . . . . . 67:0 27,200 41.0 65:0 23,574 36.3

2065 . . . . . . . . . . . 67:0 28,687 41.0 65:0 24,862 36.3

2070 . . . . . . . . . . . 67:0 30,257 41.0 65:0 26,223 36.3

2075 . . . . . . . . . . . 67:0 31,925 41.0 65:0 27,667 36.3

2080 . . . . . . . . . . . 67:0 33,686 41.0 65:0 29,194 36.3

Scaled high earnings:6

2005 . . . . . . . . . . . 65:6 20,222 36.1 65:0 19,568 35.3

2010 . . . . . . . . . . . 66:0 20,800 33.9 65:0 19,418 32.0

2015 . . . . . . . . . . . 66:0 22,243 34.3 65:0 20,759 32.3

2020 . . . . . . . . . . . 66:2 23,538 34.4 65:0 21,704 32.1

2025 . . . . . . . . . . . 67:0 24,746 34.0 65:0 21,446 30.1

2030 . . . . . . . . . . . 67:0 26,095 34.0 65:0 22,615 30.1

2035 . . . . . . . . . . . 67:0 27,511 34.0 65:0 23,840 30.1

2040 . . . . . . . . . . . 67:0 29,044 34.0 65:0 25,171 30.1

2045 . . . . . . . . . . . 67:0 30,683 34.0 65:0 26,590 30.1

2050 . . . . . . . . . . . 67:0 32,403 34.0 65:0 28,083 30.1

2055 . . . . . . . . . . . 67:0 34,193 34.0 65:0 29,635 30.1

2060 . . . . . . . . . . . 67:0 36,063 34.0 65:0 31,254 30.1

2065 . . . . . . . . . . . 67:0 38,036 34.0 65:0 32,962 30.1

2070 . . . . . . . . . . . 67:0 40,116 34.0 65:0 34,768 30.1

2075 . . . . . . . . . . . 67:0 42,327 34.0 65:0 36,683 30.1

2080 . . . . . . . . . . . 67:0 44,662 34.0 65:0 38,707 30.1
187

OASDI & HI: Estimates in Dollars

Steady maximum earnings:7

2005 . . . . . . . . . . . 65:6 $23,285 30.1 65:0 $22,525 29.7

2010 . . . . . . . . . . . 66:0 24,839 27.8 65:0 22,999 26.3

2015 . . . . . . . . . . . 66:0 27,050 27.6 65:0 25,111 26.0

2020 . . . . . . . . . . . 66:2 28,764 27.6 65:0 26,433 25.7

2025 . . . . . . . . . . . 67:0 30,441 27.3 65:0 26,186 24.0

2030 . . . . . . . . . . . 67:0 32,125 27.3 65:0 27,649 24.0

2035 . . . . . . . . . . . 67:0 33,881 27.2 65:0 29,158 23.9

2040 . . . . . . . . . . . 67:0 35,737 27.2 65:0 30,758 23.9

2045 . . . . . . . . . . . 67:0 37,756 27.2 65:0 32,498 23.9

2050 . . . . . . . . . . . 67:0 39,809 27.3 65:0 34,268 24.0

2055 . . . . . . . . . . . 67:0 42,012 27.3 65:0 36,162 24.0

2060 . . . . . . . . . . . 67:0 44,308 27.3 65:0 38,143 24.0

2065 . . . . . . . . . . . 67:0 46,728 27.3 65:0 40,223 24.0

2070 . . . . . . . . . . . 67:0 49,285 27.3 65:0 42,424 24.0

2075 . . . . . . . . . . . 67:0 51,999 27.3 65:0 44,761 24.0

2080 . . . . . . . . . . . 67:0 54,866 27.3 65:0 47,229 24.0

1 Annual scheduled benefit amounts are the total for the 12-month period starting with the month of

retirement.

2 Assumed to attain age 65 in January of the year.

3 The adjustment for constant dollars is made using the adjusted CPI indexing series shown in table VI.F6. 4 Career-average earnings at about 45 percent of the national average wage index (AWI). 5 Career-average earnings at about 100 percent of the AWI.

6 Career-average earnings at about 160 percent of the AWI.

7 Earnings for each year equal to the OASDI contribution and benefit base.

Table VI.F10.—Estimated Annual Scheduled Benefit Amounts1 for Retired Workers

With Various Pre-Retirement Earnings Patterns Based on

Intermediate Assumptions, Calendar Years 2005-80 (Cont.) 

Year attain age 652

Retirement at normal retirement age Retirement at age 65

Age at

retirement

Constant

2005

dollars 3 Percent of

earnings

Age at

retirement

Constant

2005

dollars3 Percent ofearnings
Appendices

188

G. ANALYSIS OF BENEFIT DISBURSEMENTS FROM THE OASI 

TRUST FUND WITH RESPECT TO DISABLED BENEFICIARIES

(Required by section 201(c) of the Social Security Act)

Effective January 1957, monthly benefits have been payable from the OASI

Trust Fund to disabled children aged 18 and over of retired and deceased

workers in those cases for which the disability began before age 18. The age

before which disability is required to have begun was subsequently changed

to age 22. Effective February 1968, reduced monthly benefits have been payable from this trust fund to disabled widows and widowers at ages 50 and

over. Effective January 1991, the requirements for the disability of the

widow or widower were made less restrictive.

On December 31, 2004, about 828,000 persons were receiving monthly benefits from the OASI Trust Fund because of their disabilities or the disabilities

of children. This total includes 29,000 mothers and fathers (wives or husbands under age 65 of retired-worker beneficiaries and widows or widowers

of deceased insured workers) who met all other qualifying requirements and

were receiving unreduced benefits solely because they had disabled-child

beneficiaries (or disabled children aged 16 or 17) in their care. Benefits paid

from this trust fund to the persons described above totaled $5,945 million in

calendar year 2004. Table VI.G1 shows these and similar figures for selected

calendar years during 1960-2004, and estimated experience for 2005-14

based on the intermediate set of assumptions.
189

OASI Expenditures for Disabled

Note: Totals do not necessarily equal the sums of rounded components.

Total benefit payments from the OASI Trust Fund with respect to disabled

beneficiaries are estimated to increase from $6,222 million in calendar year

2005 to $9,003 million in calendar year 2014, based on the intermediate

assumptions.

Table VI.G1.—Benefit Disbursements From the OASI Trust Fund 

With Respect to Disabled Beneficiaries

[Beneficiaries in thousands; benefit payments in millions]

Calendar year

Disabled beneficiaries, end of year Amount of benefit payments1

1 Beginning in 1966, includes payments for vocational rehabilitation services.

Total Children 2

2 Also includes certain mothers and fathers (see text).

Widowswidowers 3

3 In 1984 and later years, only disabled widows and widowers aged 50-59 are included because disabled

widows and widowers aged 60-64 would be eligible for the same benefit as a nondisabled aged widow or

widower; therefore, they are not receiving benefits solely because of a disability.

Total Children2 Widowswidowers 4

4 In 1983 and prior years, reflects the offsetting effect of lower benefits payable to disabled widows and widowers who continued to receive benefits after attaining age 60 (62, for disabled widowers, prior to 1973) as

compared to the higher nondisabled widow's and widower's benefits that would otherwise be payable. In

1984 and later years, only benefit payments to disabled widows and widowers aged 50-59 are included (see

footnote 3).

Historical data:

1960 . . . . . . . . . 117 117 — $59 $59 —

1965 . . . . . . . . . 214 214 — 134 134 —

1970 . . . . . . . . . 316 281 36 301 260 $41

1975 . . . . . . . . . 435 376 58 664 560 104

1980 . . . . . . . . . 519 460 59 1,223 1,097 126

1985 . . . . . . . . . 594 547 47 2,072 1,885 187

1986 . . . . . . . . . 614 565 49 2,219 2,022 197

1987 . . . . . . . . . 629 580 49 2,331 2,128 203

1988 . . . . . . . . . 640 591 48 2,518 2,307 211

1989 . . . . . . . . . 651 602 49 2,680 2,459 221

1990 . . . . . . . . . 662 613 49 2,882 2,649 233

1991 . . . . . . . . . 687 627 61 3,179 2,875 304

1992 . . . . . . . . . 715 643 72 3,459 3,079 380

1993 . . . . . . . . . 740 659 81 3,752 3,296 456

1994 . . . . . . . . . 758 671 86 3,973 3,481 492

1995 . . . . . . . . . 772 681 91 4,202 3,672 531

1996 . . . . . . . . . 782 687 94 4,410 3,846 565

1997 . . . . . . . . . 789 693 96 4,646 4,050 596

1998 . . . . . . . . . 797 698 99 4,838 4,210 627

1999 . . . . . . . . . 805 702 102 4,991 4,336 655

2000 . . . . . . . . . 811 707 104 5,203 4,523 680

2001 . . . . . . . . . 817 712 105 5,520 4,802 718

2002 . . . . . . . . . 823 717 106 5,773 5,024 749

2003 . . . . . . . . . 826 721 105 5,746 4,979 764

2004 . . . . . . . . . 828 723 105 5,945 5,162 781

Estimates:

2005 . . . . . . . . . 838 732 106 6,222 5,396 817

2006 . . . . . . . . . 846 740 106 6,444 5,601 835

2007 . . . . . . . . . 852 748 104 6,678 5,828 842

2008 . . . . . . . . . 858 756 102 6,961 6,093 859

2009 . . . . . . . . . 864 763 101 7,265 6,377 878

2010 . . . . . . . . . 871 771 100 7,580 6,667 901

2011 . . . . . . . . . 878 778 100 7,927 6,973 940

2012 . . . . . . . . . 884 785 100 8,280 7,287 979

2013 . . . . . . . . . 891 791 99 8,644 7,611 1,017

2014 . . . . . . . . . 895 797 98 9,003 7,944 1,042
Appendices

190

In calendar year 2004, benefit payments (including expenditures for vocational rehabilitation services) with respect to disabled persons from the OASI

Trust Fund and from the DI Trust Fund (including payments from the latter

fund to all children and spouses of disabled-worker beneficiaries) totaled

$84,197 million. Of this amount, $5,945 million or 7.1 percent represented

payments from the OASI Trust Fund. These and similar figures for selected

calendar years during 1960-2004 and estimates for calendar years 2005-14

are presented in table VI.G2.

Note: Totals do not necessarily equal the sums of rounded components.

Table VI.G2.—Benefit Disbursements Under the OASDI Program 

With Respect to Disabled Beneficiaries

[Amounts in millions]

Calendar year Total1

1 Beginning in 1966, includes payments for vocational rehabilitation services.

DI Trust Fund 2

2 Benefit payments to disabled workers and their children and spouses.

OASI Trust Fund

Amount 3

3 Benefit payments to disabled children aged 18 and over, to certain mothers and fathers (see text), and to

disabled widows and widowers (see footnote 4, table VI.G1).

Percentage of total

Historical data:

1960 . . . . . . . . . $627 $568 $59 9.4

1965 . . . . . . . . . 1,707 1,573 134 7.9

1970 . . . . . . . . . 3,386 3,085 301 8.9

1975 . . . . . . . . . 9,169 8,505 664 7.2

1980 . . . . . . . . . 16,738 15,515 1,223 7.3

1985 . . . . . . . . . 20,908 18,836 2,072 9.9

1986 . . . . . . . . . 22,075 19,856 2,219 10.1

1987 . . . . . . . . . 22,858 20,527 2,331 10.2

1988 . . . . . . . . . 24,226 21,708 2,518 10.4

1989 . . . . . . . . . 25,591 22,911 2,680 10.5

1990 . . . . . . . . . 27,717 24,835 2,882 10.4

1991 . . . . . . . . . 30,877 27,698 3,179 10.3

1992 . . . . . . . . . 34,583 31,124 3,459 10.0

1993 . . . . . . . . . 38,378 34,626 3,752 9.8

1994 . . . . . . . . . 41,730 37,757 3,973 9.5

1995 . . . . . . . . . 45,140 40,937 4,202 9.3

1996 . . . . . . . . . 48,615 44,205 4,410 9.1

1997 . . . . . . . . . 50,358 45,712 4,646 9.2

1998 . . . . . . . . . 53,062 48,224 4,838 9.1

1999 . . . . . . . . . 56,390 51,399 4,991 8.9

2000 . . . . . . . . . 60,204 55,001 5,203 8.6

2001 . . . . . . . . . 65,157 59,637 5,520 8.5

2002 . . . . . . . . . 71,493 65,721 5,773 8.1

2003 . . . . . . . . . 76,698 70,952 5,746 7.5

2004 . . . . . . . . . 84,197 78,251 5,945 7.1

Estimates:

2005 . . . . . . . . . 90,153 83,930 6,222 6.9

2006 . . . . . . . . . 95,466 89,022 6,444 6.8

2007 . . . . . . . . . 101,507 94,829 6,678 6.6

2008 . . . . . . . . . 108,270 101,309 6,961 6.4

2009 . . . . . . . . . 117.005 109,739 7,265 6.2

2010 . . . . . . . . . 122,721 115,141 7,580 6.2

2011 . . . . . . . . . 128,843 120,916 7,927 6.2

2012 . . . . . . . . . 137,057 128,777 8,280 6.0

2013 . . . . . . . . . 144,536 135,892 8,644 6.0

2014 . . . . . . . . . 152,481 143,478 9,003 5.9
191

Glossary

H. GLOSSARY

Actuarial balance. The difference between the summarized income rate and

the summarized cost rate over a given valuation period.

Actuarial deficit. A negative actuarial balance.

Administrative expenses. Expenses incurred by the Social Security Administration and the Department of the Treasury in administering the OASDI

program and the provisions of the Internal Revenue Code relating to the collection of contributions. Such administrative expenses are paid from the

OASI and DI Trust Funds.

Advance tax transfers. Amounts representing the estimated total OASDI

tax contributions for a given month. From May 1983 through November

1990, such amounts were credited to the OASI and DI Trust Funds at the

beginning of each month. Reimbursements were made from the trust funds to

the General Fund of the Treasury for the associated loss of interest. Advance

tax transfers are no longer made unless needed in order to pay benefits.

Alternatives I, II, or III. See “Assumptions.”

Annual balance. The difference between the income rate and the cost rate in

a given year.

Assets. Treasury notes and bonds, other securities guaranteed by the Federal

Government, certain Federally sponsored agency obligations, and cash, held

by the trust funds for investment purposes.

Assumptions. Values relating to future trends in certain key factors which

affect the balance in the trust funds. Demographic assumptions include fertility, mortality, net immigration, marriage, and divorce. Economic assumptions include unemployment rates, average earnings, inflation, interest rates,

and productivity. Program-specific assumptions include retirement patterns,

and disability incidence and termination rates. Three sets of demographic,

economic, and program-specific assumptions are presented in this report—

 • Alternative II is the intermediate set of assumptions, and represents the

Trustees’ best estimates of likely future demographic, economic, and

program-specific conditions.

 • Alternative I is characterized as a low cost set—it assumes relatively

rapid economic growth, low inflation, and favorable (from the standpoint of program financing) demographic conditions.

 • Alternative III is characterized as a high cost set—it assumes relatively

slow economic growth, high inflation, and unfavorable (from the standpoint of program financing) demographic conditions.

See tables V.A1, V.B1, and V.B2.
Appendices

192

Automatic cost-of-living benefit increase. The annual increase in benefits,

effective for December, reflecting the increase in the cost of living. The benefit increase equals the percentage increase in the Consumer Price Index for

Urban Wage Earners and Clerical Workers (CPI-W) measured from the average over July, August, and September of the preceding year to the average

for the same 3 months in the current year. If the increase is less than onetenth of 1 percent, when rounded, there is no automatic increase for the current year; the increase for the next year would reflect the net increase in the

CPI over a 2-year period. See table V.C1.

Auxiliary benefits. Monthly benefits payable to a spouse or child of a

retired or disabled worker, or to a survivor of a deceased worker.

Average indexed monthly earnings—AIME. The amount of earnings used

in determining the primary insurance amount (PIA) for most workers who

attain age 62, become disabled, or die after 1978. A worker’s actual past

earnings are adjusted by changes in the average wage index, in order to bring

them up to their approximately equivalent value at the time of retirement or

other eligibility for benefits.

Average wage index—AWI. The average amount of total wages for each

year after 1950, including wages in noncovered employment and wages in

covered employment in excess of the OASDI contribution and benefit base.

(See Title 20, Chapter III, section 404.211(c) of the Code of Federal Regulations for a more precise definition.) These average wage amounts are used to

index the taxable earnings of most workers first becoming eligible for benefits in 1979 or later, and for automatic adjustments in the contribution and

benefit base, bend points, earnings test exempt amounts, and other wageindexed amounts. See table V.C1.

Award. An administrative determination that an individual is entitled to

receive a specified type of OASDI benefit. Awards can represent not only

new entrants to the benefit rolls but also persons already on the rolls who

become entitled to a different type of benefit. Awards usually result in the

immediate payment of benefits, although payments may be deferred or withheld depending on the individual’s particular circumstances.

Baby boom. The period from the end of World War II through the mid1960s marked by unusually high birth rates.

Bend points. The dollar amounts defining the AIME or PIA brackets in the

benefit formulas. For the bend points for years 1979 and later, see table V.C2.

Beneficiary. A person who has been awarded benefits on the basis of his or

her own or another’s earnings record. The benefits may be either in currentpayment status or withheld.

Benefit award. See “Award.”
193

Glossary

Benefit payments. The amounts disbursed for OASI and DI benefits by the

Department of the Treasury in specified periods.

Benefit termination. See “Termination.”

Best estimate assumptions. See “Assumptions.”

Board of Trustees. A Board established by the Social Security Act to oversee the financial operations of the Federal Old-Age and Survivors Insurance

Trust Fund and the Federal Disability Insurance Trust Fund. The Board is

composed of six members, four of whom serve automatically by virtue of

their positions in the Federal Government: the Secretary of the Treasury, who

is the Managing Trustee, the Secretary of Labor, the Secretary of Health and

Human Services, and the Commissioner of Social Security. The other two

members are appointed by the President and confirmed by the Senate to

serve as public representatives. 

Book value. A bond’s value between its price at purchase and its value at

maturity. Book value is calculated as par value plus unamortized premium, if

purchased at a price above its par value, or less unamortized discount, if purchased below par.

Closed group unfunded obligation. This measure is computed like the

open group unfunded obligation except that individuals under the age of 15

(or not yet born) are excluded. In other words, only persons who are 15 years

or older as of the valuation date are included in the calculations.

Constant dollars. Amounts adjusted by the CPI to the value of the dollar in

a particular year.

Consumer Price Index—CPI. An official measure of inflation in consumer

prices. In this report, all references to the CPI relate to the Consumer Price

Index for Urban Wage Earners and Clerical Workers (CPI-W). Historical values for the CPI-W are published by the Bureau of Labor Statistics, Department of Labor.

Contribution and benefit base. Annual dollar amount above which earnings in employment covered under the OASDI program are neither taxable

nor creditable for benefit computation purposes. (Also referred to as maximum contribution and benefit base, annual creditable maximum, taxable

maximum, and maximum taxable.) See tables V.C1 and VI.A1. See “HI contribution base.”

Contributions. The amount based on a percent of earnings, up to an annual

maximum, that must be paid by—

 • employers and employees on wages from employment under the Federal Insurance Contributions Act,

 • the self-employed on net earnings from self-employment under the

Self-Employment Contributions Act, and
Appendices

194

 • States on the wages of State and local government employees covered

under the Social Security Act through voluntary agreements under section 218 of the Act.

Generally, employers withhold contributions from wages, add an equal

amount of contributions, and pay both on a current basis. Also referred to as

taxes.

Cost-of-living adjustment. See “Automatic cost-of-living benefit increase.”

Cost rate. The cost rate for a year is the ratio of the cost of the program to

the taxable payroll for the year. In this context, the cost is defined to include

scheduled benefit payments, special monthly payments to certain uninsured

persons who have 3 or more quarters of coverage (and whose payments are

therefore not reimbursable from the General Fund of the Treasury), administrative expenses, net transfers from the trust funds to the Railroad Retirement

program under the financial-interchange provisions, and payments for vocational rehabilitation services for disabled beneficiaries; it excludes special

monthly payments to certain uninsured persons whose payments are reimbursable from the General Fund of the Treasury (as described above), and

transfers under the interfund borrowing provisions.

Covered earnings. Earnings in employment covered by the OASDI program.

Covered employment. All employment for which earnings are creditable

for Social Security purposes. Almost all employment is covered under the

program. Some exceptions are:

 • State and local government employees whose employer has not elected

to be covered under Social Security and who are participating in an

employer-provided pension plan.

 • Current Federal civilian workers hired before 1984 who have not

elected to be covered.

 • Self-employed workers earning less than $400 in a calendar year.

Covered worker. A person who has earnings creditable for Social Security

purposes on the basis of services for wages in covered employment and/or on

the basis of income from covered self-employment.

Creditable earnings. Wage or self-employment earnings posted to a

worker’s earnings record, upon which eligibility for and amount of benefits

on that worker’s record is based. The maximum amount of creditable earnings for each worker in a calendar year is determined by the contribution and

benefit base.

Current-cost financing. See “Pay-as-you-go financing.”

Current dollars. Amounts expressed in nominal dollars with no adjustment

for inflationary changes in the value of the dollar over time.
195

Glossary

Current-payment status. Status of a beneficiary to whom a benefit is being

paid for a given month (with or without deductions, provided the deductions

add to less than a full month’s benefit).

Deemed wage credit. See “Military service wage credits.”

Delayed Retirement Credit. Increases the benefit amount for certain individuals who did not receive benefits for months after attainment of the normal retirement age but before age 70. Delayed retirement credit increases

apply for benefits beginning January of the year following the year the individual attains the normal retirement age. See table V.C3.

Demographic assumptions. See “Assumptions.”

Deterministic model. A model with specified assumptions for and relationships among variables. Under such a model, any specified set of assumptions

determines a single outcome directly reflecting the specifications.

Disability. For Social Security purposes, the inability to engage in substantial gainful activity (see “Substantial gainful activity—SGA”) by reason of

any medically determinable physical or mental impairment that can be

expected to result in death or to last for a continuous period of not less than

12 months. Special rules apply for workers at ages 55 and over whose disability is based on blindness.

The law generally requires that a person be disabled continuously for 5

months before he or she can qualify for a disabled-worker benefit.

Disability incidence rate. The proportion of workers in a given year,

insured for but not receiving disability benefits, who apply for and are

awarded disability benefits.

Disability Insurance (DI) Trust Fund. See “Trust fund.”

Disability termination rate. The proportion of disabled-worker beneficiaries in a given year whose disability benefits terminate as a result of the individual’s recovery, death, or attainment of normal retirement age.

Disabled-worker benefit. A monthly benefit payable to a disabled worker

under normal retirement age and insured for disability. Before November

1960, disability benefits were limited to disabled workers aged 50-64.

Disbursements. Actual expenditures (outgo) made or expected to be made

under current law, including benefits paid or payable, special monthly payments to certain uninsured persons who have 3 or more quarters of coverage

(and whose payments are therefore not reimbursable from the General Fund

of the Treasury), administrative expenses, net transfers from the trust funds

to the Railroad Retirement program under the financial-interchange provisions, and payments for vocational rehabilitation services for disabled beneficiaries; it excludes special monthly payments to certain uninsured persons

whose payments are reimbursable from the General Fund of the Treasury (as

described above), and transfers under the interfund borrowing provisions.
Appendices

196

Earnings. Unless otherwise qualified, all wages from employment and net

earnings from self-employment, whether or not taxable or covered.

Earnings test. The provision requiring the withholding of benefits if beneficiaries under normal retirement age have earnings in excess of certain

exempt amounts. See table V.C1.

Economic assumptions. See “Assumptions.”

Effective interest rate. See “Interest rate.”

Excess wages. Wages in excess of the contribution and benefit base on

which a worker initially pays taxes (usually as a result of working for more

than one employer during a year). Employee taxes on excess wages are

refundable to affected employees, while the employer taxes are not refundable.

Expenditures. See “Disbursements.”

Federal Insurance Contributions Act—FICA. Provision authorizing taxes

on the wages of employed persons to provide for Retirement, Survivors, and

Disability Insurance, and for Hospital Insurance. The tax is paid in equal

amounts by workers and their employers.

Financial interchange. Provisions of the Railroad Retirement Act providing

for transfers between the trust funds and the Social Security Equivalent Benefit Account of the Railroad Retirement program in order to place each trust

fund in the same position it would have been in if railroad employment had

always been covered under Social Security.

Fiscal year. The accounting year of the United States Government. Since

1976, a fiscal year is the 12-month period ending September 30. For example, fiscal year 2005 began October 1, 2004 and will end September 30,

2005.

Full advance funding. A financing scheme where taxes or contributions are

established to match the full cost of future benefits as these costs are incurred

through current service. Such financing methods also provide for amortization over a fixed period of any financial liability that is incurred at the beginning of the program (or subsequent modification) as a result of granting

credit for past service.

General Fund of the Treasury. Funds held by the Treasury of the United

States, other than receipts collected for a specific purpose (such as Social

Security) and maintained in a separate account for that purpose.

General fund reimbursements. Transfers from the General Fund of the

Treasury to the trust funds for specific purposes defined in the law, such as:

 • The costs associated with providing special payments made to uninsured persons who attained age 72 before 1968, and who had fewer than

3 quarters of coverage.
197

Glossary

 • Payments corresponding to the employee-employer taxes on deemed

wage credits for military personnel.

 • Interest on checks which are not negotiated 6 months after the month of

issue. (For checks issued before October, 1989, the principal was

returned to the trust funds as a general fund reimbursement; since that

time, the principal amount is automatically returned to the issuing fund

when the check is uncashed after a year.)

 • Administrative expenses incurred as a result of furnishing information

on deferred vested benefits to pension plan participants, as required by

the Employee Retirement Income Security Act of 1974 (Public Law 93-

406).

Gross domestic product—GDP. The total dollar value of all goods and services produced by labor and property located in the United States, regardless

of who supplies the labor or property.

HI contribution base. Annual dollar amount above which earnings in

employment covered under the HI program are not taxable. (Also referred to

as maximum contribution base, taxable maximum, and maximum taxable.)

Beginning in 1994, the HI contribution base was eliminated.

High cost assumptions. See “Assumptions.”

Hospital Insurance (HI) Trust Fund. See “Trust fund.”

Immigration. See “Legal immigration” and “Other immigration.”

Income rate. Ratio of income from tax revenues on a liability basis (payrolltax contributions and income from the taxation of scheduled benefits) to the

OASDI taxable payroll for the year.

Inflation. An increase in the volume of money and credit relative to available goods, resulting in an increase in the general price level.

Insured status. The state or condition of having sufficient quarters of coverage to meet the eligibility requirements for retired-worker or disabled-worker

benefits, or to permit the worker’s spouse and children or survivors to establish eligibility for benefits in the event of his or her disability, retirement, or

death. See “Quarters of coverage.”

Interest. A payment in exchange for the use of money during a specified

period.

Interest rate. Interest rates on new public-debt obligations issuable to Federal trust funds (see “Special public-debt obligation”) are determined

monthly. Such rates are set equal to the average market yield on all outstanding marketable U.S. securities not due or callable until after 4 years from the

date the rate is determined. See table V.B2 for historical and assumed future

interest rates on new special-issue securities. The effective interest rate for a

trust fund is the ratio of the interest earned by the fund over a given period of

time to the average level of assets held by the fund during the period. The
Appendices

198

effective rate of interest thus represents a measure of the overall average

interest earnings on the fund’s portfolio of assets.

Interfund borrowing. The borrowing of assets by a trust fund (OASI, DI, or

HI) from another of the trust funds when the first fund is in danger of

exhaustion. Interfund borrowing was permitted by the Social Security Act

only during 1982 through 1987; all amounts borrowed were to be repaid

prior to the end of 1989. The only exercise of this authority occurred in 1982,

when the OASI Trust Fund borrowed assets from the DI and HI Trust Funds.

The final repayment of borrowed amounts occurred in 1986.

Intermediate assumptions. See “Assumptions.”

Legal immigration. Consistent with the U.S. Citizenship and Immigration

Services, legal immigrants are individuals who are admitted to the United

States for legal permanent residence.

Life expectancy. Average remaining number of years expected prior to

death. Period life expectancy is calculated for a given year using the actual or

expected death rates at each age for that year. Cohort life expectancy, sometimes referred to as generational life expectancy, is calculated for individuals

at a specific age in a given year using actual or expected death rates from the

years in which the individuals would actually reach each succeeding age if

he or she survives.

Long range. The next 75 years. Long-range actuarial estimates are made for

this period because it is approximately the maximum remaining lifetime of

current Social Security participants.

Low cost assumptions. See “Assumptions.”

Lump-sum death benefit. A lump sum, generally $255, payable on the

death of a fully or currently insured worker. The lump sum is payable to the

surviving spouse of the worker, under most circumstances, or to the worker’s

children.

Maximum family benefit. The maximum monthly amount that can be paid

on a worker’s earnings record. Whenever the total of the individual monthly

benefits payable to all the beneficiaries entitled on one earnings record

exceeds the maximum, each dependent’s or survivor’s benefit is proportionately reduced to bring the total within the maximum. Benefits payable to

divorced spouses or surviving divorced spouses are not reduced under the

family maximum provision.

Medicare. A nationwide, Federally administered health insurance program

authorized in 1965 to cover the cost of hospitalization, medical care, and

some related services for most people age 65 and over. In 1972, coverage

was extended to people receiving Social Security Disability Insurance payments for 2 years, and people with End-Stage Renal Disease. In 2006, prescription drug coverage will be added as well. Medicare consists of two
199

Glossary

separate but coordinated programs—Hospital Insurance (HI, Part A) and

Supplementary Medical Insurance (SMI). The SMI program is composed of

three separate accounts—the Part B Account, the Part D Account, and the

Transitional Assistance Account. Almost all persons who are aged 65 and

over or disabled and who are entitled to HI are eligible to enroll in Part B and

Part D on a voluntary basis by paying monthly premiums. Health insurance

protection is available to Medicare beneficiaries without regard to income.

Military service wage credits. Credits recognizing that military personnel

receive wages in kind (such as food and shelter) in addition to their basic pay

and other cash payments. Noncontributory wage credits of $160 were provided for each month of active military service from September 16, 1940,

through December 31, 1956. For years after 1956, the basic pay of military

personnel is covered under the Social Security program on a contributory

basis. In addition to the contributory credits for basic pay, noncontributory

wage credits of $300 were granted for each calendar quarter, from January

1957 through December 1977, in which a person received pay for military

service. Noncontributory wage credits of $100 were granted for each $300 of

military wages, up to a maximum credit of $1,200 per calendar year, from

January 1978 through December 2001.

National average wage index—AWI. See “Average wage index—AWI.”

Normal retirement age. The age at which a person may first become entitled to unreduced retirement benefits. For persons reaching age 62 before

2000, the normal retirement age is 65. It will increase gradually to 67 for persons reaching that age in 2027 or later, beginning with an increase to 65

years and 2 months for persons reaching age 65 in 2003. See table V.C3.

Old-Age and Survivors Insurance (OASI) Trust Fund. See “Trust fund.”

Old-law base. Amount the contribution and benefit base would have been if

the discretionary increases in the base under the 1977 amendments had not

been enacted. The Social Security Amendments of 1972 provided for automatic annual indexing of the contribution and benefit base. The Social Security Amendments of 1977 provided ad hoc increases to the bases for

1979-81, with subsequent bases updated in accordance with the normal

indexing procedure. See table V.C2.

Open group unfunded obligation. This measure is computed as the excess

of the present value of the projected cost of the program over a specified

time period (for example the next 75 years) over the sum of (1) the value of

trust fund assets at the beginning of the period and (2) the present value of

the projected tax income of the program, assuming scheduled tax rates and

benefit levels.

Other immigration. Individuals who enter the United States and are not

admitted for legal permanent residence. This includes individuals who are
Appendices

200

legally admitted, but not seeking permanent residence as well as those who

are unauthorized.

Outgo. See “Disbursements.”

Par value. The value printed on the face of a bond. For both public and special issues held by the trust funds, par value is also the redemption value at

maturity.

Partial advance funding. A financing scheme where taxes are scheduled to

provide a substantial accumulation of trust fund assets, thereby generating

additional interest income to the trust funds and reducing the need for payroll

tax increases in periods when costs are relatively high. (Higher general taxes

or additional borrowing may be required, however, to support the payment of

such interest.) While substantial, the trust fund buildup under partial advance

funding is much smaller than it would be with full advance funding.

Pay-as-you-go financing. A financing scheme where taxes are scheduled to

produce just as much income as required to pay current benefits, with trust

fund assets built up only to the extent needed to prevent exhaustion of the

fund by random economic fluctuations.

Payment cycling. Beneficiaries on the rolls before May 1, 1997, are paid on

the third of the month. Persons applying for OASDI benefits after April

1997, however, generally are paid on the second, third, or fourth Wednesday

of the month following the month for which payment is due. The particular

Wednesday payment date is based on the wage earner’s date of birth. For

those born on the first through tenth, the benefit payment day is the second

Wednesday of the month; for those born on the eleventh through the twentieth, the benefit payment day is the third Wednesday of the month; and for

those born after the twentieth of the month, the payment day is the fourth

Wednesday of the month.

Payroll taxes. A tax levied on the gross wages of workers. See tables VI.A1

and VI.F1.

Population in the Social Security area. The population comprised of (i)

residents of the 50 States and the District of Columbia (adjusted for net census undercount); (ii) civilian residents of Puerto Rico, the Virgin Islands,

Guam, American Samoa and the Northern Mariana Islands; (iii) Federal

civilian employees and persons in the U.S. Armed Forces abroad and their

dependents; (iv) crew members of merchant vessels; and (v) all other U.S.

citizens abroad.

Present value. The equivalent value, at the present time, of a future stream

of payments (either income or cost). The present value of a future stream of

payments may be thought of as the lump-sum amount that, if invested today,

together with interest earnings would be just enough to meet each of the payments as they fell due. Present values are widely used in calculations involv-
201

Glossary

ing financial transactions over long periods of time to account for the time

value of money (interest). For the purpose of present-value calculations for

this report, values are discounted by the effective yield on trust fund assets.

Primary insurance amount—PIA. The monthly amount payable to a

retired worker who begins to receive benefits at normal retirement age or

(generally) to a disabled worker. This amount, which is related to the

worker’s average monthly wage or average indexed monthly earnings, is also

the amount used as a base for computing all types of benefits payable on the

basis of one individual’s earnings record.

Primary-insurance-amount formula. The mathematical formula relating

the PIA to the AIME for workers who attain age 62, become disabled, or die

after 1978. The PIA is equal to the sum of 90 percent of AIME up to the first

bend point, plus 32 percent of AIME above the first bend point up to the second bend point, plus 15 percent of AIME in excess of the second bend point.

Automatic benefit increases are applied beginning with the year of eligibility.

See table V.C2 for historical and assumed future bend points and table V.C1

for historical and assumed future benefit increases.

Quarters of coverage. Basic unit of measurement for determining insured

status. In 2005, a worker receives one quarter of coverage (up to a total of

four) for each $920 of annual covered earnings. The amount of earnings

required for a quarter of coverage is subject to annual automatic increases in

proportion to increases in average wages. For amounts applicable for years

after 1978, see table V.C2. 

Railroad retirement. A Federal insurance program, somewhat similar to

Social Security, designed for workers in the railroad industry. The provisions

of the Railroad Retirement Act provide for a system of coordination and

financial interchange between the Railroad Retirement program and the

Social Security program.

Reallocation of tax rates. An increase in the tax rate payable to either the

OASI or DI Trust Fund, with a corresponding reduction in the rate for the

other fund, so that the total OASDI tax rate is not changed. 

Real-wage differential. The difference between the percentage increases in

(1) the average annual wage in covered employment and (2) the average

annual Consumer Price Index. See table V.B1.

Recession. A period of adverse economic conditions; in particular, two or

more successive calendar quarters of negative growth in gross domestic

product.

Retired-worker benefit. A monthly benefit payable to a fully insured retired

worker aged 62 or older or to a person entitled under the transitionally

insured status provision in the law. Retired-worker benefit data do not

include special age-72 benefits.
Appendices

202

Retirement age. The age at which an individual establishes entitlement to

retirement benefits. See “Normal retirement age.”

Retirement earnings test. See “Earnings test.”

Retirement test. See “Earnings test.”

Self-employment. Operation of a trade or business by an individual or by a

partnership in which an individual is a member.

Self-Employment Contributions Act–SECA. Provision authorizing Social

Security taxes on the net earnings of most self-employed persons.

Short range. The next 10 years. Short-range actuarial estimates are prepared

for this period because of the short-range test of financial adequacy. The

Social Security Act requires estimates for 5 years; estimates are prepared for

an additional 5 years to help clarify trends which are only starting to develop

in the mandated first 5-year period. 

Social Security Act. Provisions of the law governing most operations of the

Social Security program. Original Social Security Act is Public Law 74-271,

enacted August 14, 1935. With subsequent amendments, the Social Security

Act consists of 20 titles, of which four have been repealed. The Old-Age,

Survivors, and Disability Insurance program is authorized by title II of the

Social Security Act. 

Solvency. A program is solvent at a point in time if it is able to pay scheduled benefits when due with scheduled financing. For example, the OASDI

program is considered solvent over any period for which the trust funds

maintain a positive balance throughout the period.

Special public-debt obligation. Securities of the United States Government

issued exclusively to the OASI, DI, HI, and SMI Trust Funds and other Federal trust funds. Section 201(d) of the Social Security Act provides that the

public-debt obligations issued for purchase by the OASI and DI Trust Funds

shall have maturities fixed with due regard for the needs of the funds. The

usual practice has been to spread the holdings of special issues, as of each

June 30, so that the amounts maturing in each of the next 15 years are

approximately equal. Special public-debt obligations are redeemable at par

value at any time and carry interest rates determined by law (see “Interest

rate”). See tables VI.A5 and VI.A6 for a listing of the obligations held by the

OASI and DI Trust Funds, respectively.

Statutory blindness. Central visual acuity of 20/200 or less in the better eye

with the use of a correcting lens or tunnel vision of 20o or less.

Stochastic model. A model used for projecting a probability distribution of

potential outcomes. Such models allow for random variation in one or more

variables through time. The random variation is generally based on fluctuations observed in historical data for a selected period. Distributions of poten-
203

Glossary

tial outcomes are derived from a large number of simulations, each of which

reflects random variation in the variable(s).

Substantial gainful activity—SGA. The level of work activity used to

establish disability. A finding of disability requires that a person be unable to

engage in substantial gainful activity. A person who is earning more than a

certain monthly amount (net of impairment-related work expenses) is ordinarily considered to be engaging in SGA. The amount of monthly earnings

considered as SGA depends on the nature of a person’s disability. The Social

Security Act specifies a higher SGA amount for statutorily blind individuals;

Federal regulations specify a lower SGA amount for non-blind individuals.

Both SGA amounts increase with increases in the national average wage

index.

Summarized balance. The difference between the summarized cost rate and

the summarized income rate, expressed as a percentage of taxable payroll.

Summarized cost rate. The ratio of the present value of cost to the present

value of the taxable payroll for the years in a given period, expressed as a

percentage. This percentage can be used as a measure of the relative level of

cost during the period in question. For purposes of evaluating the financial

adequacy of the program, the summarized cost rate is adjusted to include the

cost of reaching and maintaining a target trust fund level. Because a trust

fund level of about 1 year’s cost is considered to be an adequate reserve for

unforeseen contingencies, the targeted trust fund ratio used in determining

summarized cost rates is 100 percent of annual cost. Accordingly, the

adjusted summarized cost rate is equal to the ratio of (a) the sum of the

present value of the cost during the period plus the present value of the targeted ending trust fund level, to (b) the present value of the taxable payroll

during the projection period.

Summarized income rate. The ratio of the present value of scheduled tax

income to the present value of taxable payroll for the years in a given period,

expressed as a percentage. This percentage can be used as a measure of the

relative level of income during the period in question. For purposes of evaluating the financial adequacy of the program, the summarized income rate is

adjusted to include assets on hand at the beginning of the period. Accordingly, the adjusted summarized income rate equals the ratio of (a) the sum of

the trust fund balance at the beginning of the period plus the present value of

the total income from taxes during the period, to (b) the present value of the

taxable payroll for the years in the period.

Supplemental Security Income—SSI. A Federally administered program

(often with State supplementation) of cash assistance for needy aged, blind,

or disabled persons. SSI is funded through the General Fund of the Treasury

and administered by the Social Security Administration.

Supplementary Medical Insurance (SMI) Trust Fund. See “Trust fund.”
Appendices

204

Survivor benefit. Benefit payable to a survivor of a deceased worker.

Taxable earnings. Wages and/or self-employment income, in employment

covered by the OASDI and/or HI programs, that is under the applicable

annual maximum taxable limit. For 1994 and later, no maximum taxable

limit applies to the HI program.

Taxable payroll. A weighted average of taxable wages and taxable selfemployment income. When multiplied by the combined employee-employer

tax rate, it yields the total amount of taxes incurred by employees, employers, and the self-employed for work during the period.

Taxable self-employment income. The maximum amount of net earnings

from self employment by an earner which, when added to any taxable wages,

does not exceed the contribution and benefit base. For HI beginning in 1994,

all of net earnings from self employment.

Taxable wages. See “Taxable earnings.”

Taxation of benefits. During 1984-93, up to one-half of an individual’s or a

couple’s OASDI benefits was potentially subject to Federal income taxation

under certain circumstances. The revenue derived from this provision was

allocated to the OASI and DI Trust Funds on the basis of the income taxes

paid on the benefits from each fund. Beginning in 1994, the maximum portion of OASDI benefits potentially subject to taxation was increased to

85 percent. The additional revenue derived from taxation of benefits in

excess of one-half, up to 85 percent, is allocated to the HI Trust Fund.

Taxes. See “Contributions.”

Termination. Cessation of payment of a specific type of benefit because the

beneficiary is no longer entitled to receive it. For example, benefits might

terminate as a result of the death of the beneficiary, the recovery of a disabled beneficiary, or the attainment of age 18 by a child beneficiary. In some

cases, the individual may become immediately entitled to another type of

benefit (such as the conversion of a disabled-worker beneficiary at normal

retirement age to a retired-worker beneficiary).

Test of Long-Range Close Actuarial Balance. Summarized income rates

and cost rates are calculated for each of 66 valuation periods within the full

75-year long-range projection period. The first of these periods consists of

the next 10 years. Each succeeding period becomes longer by 1 year, culminating with the period consisting of the next 75 years. The long-range test is

met if, for each of the 66 valuation periods, the actuarial balance is not less

than zero or is negative by, at most, a specified percentage of the summarized

cost rate for the same time period. The percentage allowed for a negative

actuarial balance is 0 percent for the 10-year period, grading uniformly to

5 percent for the full 75-year period. The criterion for meeting the test is less

stringent for the longer periods in recognition of the greater uncertainty asso-
205

Glossary

ciated with estimates for more distant years. The test is applied to OASI and

DI separately, as well as combined, based on the intermediate set of assumptions.

Test of Short-Range Financial Adequacy. The conditions required to meet

this test are as follows:

 • If the trust fund ratio for a fund exceeds 100 percent at the beginning of

the projection period, then it must be projected to remain at or above

100 percent throughout the 10-year projection period;

 • Alternatively, if the fund ratio is initially less than 100 percent, it must

be projected to reach a level of at least 100 percent within 5 years (and

not be depleted at any time during this period) and then remain at or

above 100 percent throughout the remainder of the 10-year period.

These conditions apply to each trust fund separately, as well as to the combined funds, and are evaluated based on the intermediate set of assumptions.

Total fertility rate. The average number of children who would be born to a

woman in her lifetime if she were to experience the birth rates by age

observed in, or assumed for, a specified year, and if she were to survive the

entire childbearing period.

Trust fund. Separate accounts in the United States Treasury in which are

deposited the taxes received under the Federal Insurance Contributions Act

and the Self-Employment Contributions Act, as well as taxes resulting from

coverage of State and local government employees; any sums received under

the financial interchange with the railroad retirement account; voluntary hospital and medical insurance premiums; and transfers of Federal general revenues. Funds not withdrawn for current monthly or service benefits, the

financial interchange, and administrative expenses are invested in interestbearing Federal securities, as required by law; the interest earned is also

deposited in the trust funds.

 • Old-Age and Survivors Insurance (OASI). The trust fund used for

paying monthly benefits to retired-worker (old-age) beneficiaries and

their spouses and children and to survivors of deceased insured workers.

 • Disability Insurance (DI). The trust fund used for paying monthly benefits to disabled-worker beneficiaries and their spouses and children and

for providing rehabilitation services to the disabled.

 • Hospital Insurance (HI). The trust fund used for paying part of the

costs of inpatient hospital services and related care for aged and disabled individuals who meet the eligibility requirements. Also known as

Medicare Part A.

 • Supplementary Medical Insurance (SMI). The Medicare trust fund

composed of the Part B Account, the Part D Account, and the Transitional Assistance Account. The Part B Account pays for a portion of the
Appendices

206

costs of physicians’ services, outpatient hospital services, and other

related medical and health services for voluntarily enrolled aged and

disabled individuals. The Part D Account pays private plans to provide

prescription drug coverage, beginning in 2006. The Transitional Assistance Account pays for transitional assistance under the prescription

drug card program in 2004 and 2005.

Trust fund ratio. A measure of the adequacy of the trust fund level. Defined

as the assets at the beginning of the year, including advance tax transfers (if

any), expressed as a percentage of the cost during the year. The trust fund

ratio represents the proportion of a year’s cost which could be paid with the

funds available at the beginning of the year.

Unfunded obligation. See “Open group unfunded obligation” and “Closed

group unfunded obligation”.

Unnegotiated check. A check which has not been cashed 6 months after the

end of the month in which the check was issued. When a check has been outstanding for a year (i) the check is administratively cancelled by the Department of the Treasury and (ii) the issuing trust fund is reimbursed separately

for the amount of the check and interest for the period the check was outstanding. The appropriate trust fund also receives an interest adjustment for

the time the check was outstanding if it is cashed 6-12 months after the

month of issue. If a check is presented for payment after it is administratively

cancelled, a replacement check is issued.

Valuation period. A period of years which is considered as a unit for purposes of calculating the financial status of a trust fund.

Vocational rehabilitation. Services provided to disabled persons to help

enable them to return to gainful employment. Reimbursement from the trust

funds for the costs of such services is made only in those cases where the services contributed to the successful rehabilitation of the beneficiaries.

Year of exhaustion. The year in which a trust fund would become unable to

pay benefits when due because the assets of the fund were exhausted.
List of Tables

207

II. OVERVIEW

II.B1 Summary of 2004 Trust Fund Financial Operations . . . . . . . . 4

II.B2 Tax Rates for 2004 and Later . . . . . . . . . . . . . . . . . . . . . . . . 4

II.C1 Ultimate Values of Key Demographic and Economic 

Assumptions for the Long-Range (75-year) Projection Period . 6

II.D1 Projected Maximum Trust Fund Ratios Attained and Trust 

Fund Exhaustion Dates Under the Intermediate Assumptions . 10

II.D2 Reasons for Change in the 75-Year Actuarial Balance

Under Intermediate Assumptions . . . . . . . . . . . . . . . . . . . . . 13

III. FINANCIAL OPERATIONS OF THE TRUST FUNDS AND

LEGISLATIVE CHANGES IN THE LAST YEAR

III.A1 Operations of the OASI Trust Fund, Calendar Year 2004 . . . . 19

III.A2 Operations of the DI Trust Fund, Calendar Year 2004 . . . . . . . 23

III.A3 Operations of the Combined OASI and DI Trust Funds, 

Calendar Year 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

III.A4 Comparison of Actual Calendar Year 2004 Trust Fund 

Operations With Estimates Made in Prior Reports . . . . . . . . . 25

III.A5 Distribution of Benefit Payments by Type of Beneficiary or 

Payment, Calendar Years 2003 and 2004 . . . . . . . . . . . . . . . . 26

III.A6 Administrative Expenses as a Percentage of Contribution 

Income and of Total Expenditures, Calendar Years 2000-04 . . 27

III.A7 Trust Fund Investment Transactions, Calendar Year 2004 . . . . 27

IV. ACTUARIAL ESTIMATES

IV.A1 Operations of the OASI Trust Fund, Calendar Years 2000-14 . 32

IV.A2 Operations of the DI Trust Fund, Calendar Years 2000-14 . . . 35

IV.A3 Operations of the Combined OASI and DI Trust Funds,

Calendar Years 2000-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

IV.A4 Reasons for Change in Trust Fund Ratios at the Beginning 

of the Tenth Year of Projection . . . . . . . . . . . . . . . . . . . . . . . 39

IV.B1 Estimated Annual Income Rates, Cost Rates, and Balances

Calendar Years 1990-2080 . . . . . . . . . . . . . . . . . . . . . . . . . . 43

IV.B2 Covered Workers and Beneficiaries, Calendar Years 1945-2080 47

IV.B3 Estimated Trust Fund Ratios, Calendar Years 2005-80 . . . . . . 52

IV.B4 Components of Summarized Income Rates and Cost Rates, 

Calendar Years 2005-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

IV.B5 Components of 75-Year Actuarial Balance

Under Intermediate Assumptions (2005-79). . . . . . . . . . . . . . 57
List of Tables

208

IV.B6 Unfunded OASDI Obligations for 1935 (Program Inception)

Through the Infinite Horizon . . . . . . . . . . . . . . . . . . . . . . . . 59

IV.B7 Present Values of OASDI Cost Less Tax Revenue and 

Unfunded Obligations for Program Participants . . . . . . . . . . . 60

IV.B8 Comparison of Estimated Long-Range Actuarial Balances 

With the Minimum Allowable in the Test for Close Actuarial 

Balance, Based on Intermediate Assumptions . . . . . . . . . . . . 63

IV.B9 Reasons for Change in the 75-Year Actuarial Balance

Under Intermediate Assumptions . . . . . . . . . . . . . . . . . . . . . 65

V. ASSUMPTIONS AND METHODS UNDERLYING

ACTUARIAL ESTIMATES

V.A1 Principal Demographic Assumptions, Calendar 

Years 1940-2080 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

V.A2 Social Security Area Population as of July 1 and Dependency 

Ratios, Calendar Years 1950-2080. . . . . . . . . . . . . . . . . . . . . 77

V.A3 Period Life Expectancies . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

V.A4 Cohort Life Expectancies . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

V.B1 Principal Economic Assumptions . . . . . . . . . . . . . . . . . . . . . 87

V.B2 Additional Economic Factors . . . . . . . . . . . . . . . . . . . . . . . . 93

V.C1 Cost-of-Living Benefit Increases, Average Wage Index, 

Contribution and Benefit Bases, and Retirement Earnings 

Test Exempt Amounts, 1975-2014 . . . . . . . . . . . . . . . . . . . . 97

V.C2 Selected Wage-Indexed Program Amounts, Calendar 

Years 1978-2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

V.C3 Legislated Changes in Normal Retirement Age and Delayed 

Retirement Credits, for Persons Reaching Age 62 in Each 

Year 1986 and Later . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

V.C4 OASI Beneficiaries With Benefits in Current-Payment Status 

at the End of Calendar Years 1945-2080 . . . . . . . . . . . . . . . . 111

V.C5 Long-Range Ultimate Disabled Worker Age-Sex-Adjusted 

Incidence Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

V.C6 DI Beneficiaries With Benefits in Current-Payment Status at 

the End of Calendar Years 1960-2080 . . . . . . . . . . . . . . . . . . 118
List of Tables

209

VI. APPENDICES

A. HISTORY OF OASI AND DI TRUST FUND OPERATIONS

VI.A1 Contribution and Benefit Base and Contribution Rates . . . . . . 124

VI.A2 Historical Operations of the OASI Trust Fund, Calendar 

Years 1937-2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

VI.A3 Historical Operations of the DI Trust Fund, Calendar 

Years 1957-2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

VI.A4 Historical Operations of the Combined OASI and DI Trust 

Funds, Calendar Years 1957-2004 . . . . . . . . . . . . . . . . . . . . . 132

VI.A5 Assets of the OASI Trust Fund, End of Calendar Years 

2003 and 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

VI.A6 Assets of the DI Trust Fund, End of Calendar Years 

2003 and 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

B. HISTORY OF ACTUARIAL BALANCE ESTIMATES

VI.B1 Long-Range OASDI Actuarial Balances as Shown in the 

Trustees Reports for 1982-2005 . . . . . . . . . . . . . . . . . . . . . . 139

C. FISCAL YEAR HISTORICAL DATA AND 

PROJECTIONS THROUGH 2014

VI.C1 Operations of the OASI Trust Fund, Fiscal Year 2004. . . . . . . 142

VI.C2 Operations of the DI Trust Fund, Fiscal Year 2004 . . . . . . . . . 143

VI.C3 Operations of the Combined OASI and DI Trust Funds, 

Fiscal Year 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

VI.C4 Operations of the OASI Trust Fund in Fiscal Years 2000-14 . . 145

VI.C5 Operations of the DI Trust Fund in Fiscal Years 2000-14 . . . . 146

VI.C6 Operations of the Combined OASI and DI Trust Funds in 

Fiscal Years 2000-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

D. LONG-RANGE SENSITIVITY ANALYSIS

VI.D1 Sensitivity to Varying Fertility Assumptions . . . . . . . . . . . . . 149

VI.D2 Sensitivity to Varying Death-Rate Assumptions . . . . . . . . . . . 150

VI.D3 Sensitivity to Varying Net-Immigration Assumptions . . . . . . . 151

VI.D4 Sensitivity to Varying Real-Wage Assumptions . . . . . . . . . . . 153

VI.D5 Sensitivity to Varying CPI-Increase Assumptions. . . . . . . . . . 154

VI.D6 Sensitivity to Varying Real-Interest Assumptions . . . . . . . . . . 155

VI.D7 Sensitivity to Varying Disability Incidence Assumptions. . . . . 156

VI.D8 Sensitivity to Varying Disability Termination Assumptions. . . 157
List of Tables

210

E. STOCHASTIC PROJECTIONS

VI.E1 Long-Range Estimates Relating to the Actuarial Status of the 

Combined OASDI Program . . . . . . . . . . . . . . . . . . . . . . . . . 163

F. ESTIMATES FOR OASDI AND HI, SEPARATE AND COMBINED

VI.F1 Contribution Rates for the OASDI and HI Programs. . . . . . . . 165

VI.F2 Estimated OASDI and HI Annual Income Rates, Cost Rates, 

and Balances, Calendar Years 2005-80 . . . . . . . . . . . . . . . . . 166

VI.F3 Summarized OASDI and HI Income Rates and Cost Rates for 

Valuation Periods, Calendar Years 2005-79 . . . . . . . . . . . . . . 168

VI.F4 OASDI and HI Annual and Summarized Income, Cost, and 

Balance as a Percentage of GDP, Calendar Years 2005-80. . . . 171

VI.F5 Ratio of OASDI Taxable Payroll to GDP, Calendar Years 

2005-80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

VI.F6 Selected Economic Variables, Calendar Years 2004-80 . . . . . . 176

VI.F7 Operations of the Combined OASI and DI Trust Funds, 

in Constant 2005 Dollars, Calendar Years 2005-80 . . . . . . . . . 178

VI.F8 Operations of the Combined OASI and DI Trust Funds, 

in Current Dollars, Calendar Years 2005-80 . . . . . . . . . . . . . . 181

VI.F9 OASDI and HI Annual Income Excluding Interest, Cost, and

Balance in Current Dollars, Calendar Years 2005-80 . . . . . . . 183

VI.F10 Estimated Annual Scheduled Benefit Amounts for Retired 

Workers With Various Pre-Retirement Earnings Patterns Based 

on Intermediate Assumptions, Calendar Years 2005-80 . . . . . 186

G. ANALYSIS OF BENEFIT DISBURSEMENTS FROM THE OASI 

TRUST FUND WITH RESPECT TO DISABLED BENEFICIARIES

VI.G1 Benefit Disbursements From the OASI Trust Fund With 

Respect to Disabled Beneficiaries . . . . . . . . . . . . . . . . . . . . . 189

VI.G2 Benefit Disbursements Under the OASDI Program With 

Respect to Disabled Beneficiaries . . . . . . . . . . . . . . . . . . . . . 190
List of Figures

211

II. OVERVIEW

II.D1 Short-Range OASDI Trust Fund Ratios . . . . . . . . . . . . . . . . . 7

II.D2 OASDI Income and Cost Rates Under Intermediate 

Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

II.D3 Number of Covered Workers Per OASDI Beneficiary. . . . . . . 9

II.D4 Cumulative OASDI Income Less Cost, Based on Present Law 

Tax Rates and Scheduled Benefits. . . . . . . . . . . . . . . . . . . . . 11

II.D5 OASDI Cost and Scheduled Tax Revenue as a Percentage 

of GDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

II.D6 OASDI Annual Balances: 2004 and 2005 Trustees Reports. . . 14

II.D7 Long-Range OASDI Trust Fund Ratios Under Alternative 

Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

IV. ACTUARIAL ESTIMATES

IV.A1 Short-Range OASI and DI Trust Fund Ratios. . . . . . . . . . . . . 31

IV.B1 Long-Range OASI and DI Annual Income Rates and 

Cost Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

IV.B2 Number of OASDI Beneficiaries Per 100 Covered Workers . . 49

IV.B3 Long-Range OASI and DI Trust Fund Ratios. . . . . . . . . . . . . 53

IV.B4 Long-Range Test of Close Actuarial Balance . . . . . . . . . . . . . 64

IV.B5 OASDI Annual Balances: 2004 and 2005 Reports . . . . . . . . . 68

V. ASSUMPTIONS AND METHODS UNDERLYING

ACTUARIAL ESTIMATES

V.C1 Primary-Insurance-Amount Formula for the 2005 Cohort . . . . 99

V.C2 Maximum-Family-Benefit Formula for the 2005 Cohort . . . . . 99

V.C3 DI Disabled Worker Incidence Rates, 1970-2014 . . . . . . . . . . 114

VI. APPENDICES

VI.E1 Annual Trust Fund Ratios. . . . . . . . . . . . . . . . . . . . . . . . . . . 161

VI.E2 Annual Cost Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

VI.F1 Estimated OASDI Income and Cost in Constant Dollars,

Based on Intermediate Assumptions . . . . . . . . . . . . . . . . . . . 180
Index

212

A

Actuarial balance 7, 10, 40, 103, 137, 148, 168

Actuarial balance, long-range test 63

Actuarial deficit 2, 10, 16, 55, 168

Actuarial estimates, LR 40

Actuarial estimates, SR 29

Adjusted program amounts 95

Administrative expenses 4, 27, 41, 120, 127, 142, 169, 177

Advance tax transfers 50, 129

Amendments 28

Annual balance 13, 40, 65

Assets 2, 4, 7, 21, 29, 41, 127, 142, 155, 164, 175

Assumptions 2, 7, 40, 69, 82, 95, 137, 148, 165, 169, 174, 188

Automatic cost-of-living benefit increase 4, 33, 83, 95

Auxiliary benefits 105

Average benefits 119

Average earnings assumptions 84

Average indexed monthly earnings (AIME) 98

Average wage index 95, 174

Award 106

B

Baby-boom generation 2, 8, 16, 34, 41, 88, 114, 170

Bend points 98

Beneficiaries, DI 112

Beneficiary 9, 33, 46, 69, 96, 140, 149, 169, 177, 188

Beneficiary, OASI 106

Benefit payments 4, 8, 30, 33, 41, 120, 127, 142, 154, 169, 177, 189

Benefit termination 6, 36

Best estimate 6, 16, 29, 69

Board of Trustees 29, 82, 123

Book value 134

C

Close actuarial balance 40, 60

Closed group unfunded obligation 60, 193

Constant dollars 179

Consumer Price Index 83, 153, 174, 192

Contribution and benefit base 31, 85, 96, 124, 174, 192

Contributions 4, 41, 123, 142, 164, 169, 177, 191

Cost rate 3, 8, 41, 103, 164

Cost-of-living adjustment 95

Covered earnings 4, 95, 173

Covered employment 6, 31, 84, 102, 123, 152

Covered worker 46, 102, 151

Creditable earnings 194
213

Index

Current dollars 174

Current-payment status 34, 116, 192

D

Deemed wage credit 41, 103, 123

Delayed retirement credit 102

Demographic assumptions 6, 13, 29, 40, 70, 89, 95, 137, 175, 191

Deterministic model 158, 163, 195

DI beneficiaries 112

Disability 123, 151, 188

Disability incidence rate 51, 69, 113, 151, 155, 191

Disability Insurance Trust Fund 193

Disability termination rate 156

Disabled-worker benefit 113, 195

Disbursements 18, 19, 20, 22, 23, 24, 29, 142, 143, 144, 189, 190

E

Earnings 2, 4, 30, 41, 84, 96, 123, 138, 164, 173, 174, 191

Earnings test 85, 96, 192

Economic assumptions 6, 13, 29, 38, 40, 82, 89, 95, 137, 175, 191

Excess wages 41, 103, 175

Expenditures 2, 4, 6, 21, 25, 27, 29, 33, 36, 50, 127, 128, 130, 132, 195

F

Federal Insurance Contributions Act 164, 193

Fertility assumptions 70

Financial interchange 4, 120, 127

Fiscal year 73, 129, 142

Full advance funding 196

G

General Fund of the Treasury 32, 33, 121, 125, 169, 177, 191, 194

General fund reimbursement 196

Gross domestic product 3, 46, 69, 82, 169

Gross domestic product projections 90

H

High cost assumptions 6, 14, 30, 42, 69, 82, 115, 148, 165, 169, 174, 191

Hospital Insurance program 124, 164, 199

Hospital Insurance Trust Fund 169

I

Immigration 6, 69, 70, 73, 75, 151, 158, 191, 197

Immigration assumptions 73

Income rate 3, 8, 41, 164

Inflation 6, 69, 83, 174, 191

Inflation assumptions 83

Insured population 6, 104
Index

214

Insured status 34, 100

Interest 30, 91, 126, 137, 142, 165, 169, 175, 191

Interest rate 31, 69, 126, 137, 154, 175, 191

Interest rate projections 91

Interfund borrowing 129, 194

Intermediate assumptions 29, 31, 33, 42, 69, 115, 148, 165, 169, 174, 179,

188, 191

L

Labor force projections 88

Legal immigration 73, 76, 198

Life expectancy 2, 16, 69, 79, 88, 198

Life expectancy estimates 78

Long range 7, 40, 70, 82, 107, 137, 164, 169, 174

Low cost assumptions 6, 14, 33, 42, 69, 115, 148, 165, 174, 191

Lump-sum death payment 120

M

Maximum family benefit 99

Medicare 71, 198

Military service 32, 41, 85, 103, 121, 123, 197

N

National average wage index 95, 174

Normal retirement age 96, 184, 195

O

OASI beneficiaries 106

Old-Age and Survivors Insurance Trust Fund 123, 193

Old-law base 100

Open group unfunded obligation 2, 7, 13, 40, 56, 57, 163, 193, 199

Other immigration 73, 151, 158, 199

P

Par value 126, 193

Partial advance funding 200

Pay-as-you-go financing 137

Payroll taxes 2, 16, 41, 54, 55, 95, 103, 140, 148, 164, 177

Population estimates 76

Population in the Social Security area 31, 48, 76, 88, 103, 151

Present value 137

Primary insurance amount (PIA) 98

Productivity assumptions 82

Q

Quarters of coverage 41, 194
215

Index

R

Railroad Retirement 41, 100, 120, 127, 142, 164, 169, 177, 194

Reallocation of tax rates 201

Real-wage differential 86, 152

Recession 29, 82

Retired-worker benefit 106, 151, 188

Retirement age 8, 36, 41, 96, 170, 184, 195

Retirement earnings test 85, 96

S

Self-employment 41, 83, 103, 123, 165, 193

Self-Employment Contributions Act 193

Sensitivity analysis 148

Short range 7, 29, 50, 82, 106, 115

Social Security Act 95, 126, 174, 188, 193

Social Security amendments 28

Solvency 12, 30, 40, 202

Special public-debt obligation 33, 94, 126, 155, 175

Stochastic projections 82, 158

Substantial gainful activity 112, 195

Summarized balance 170

Summarized income and cost rates 54, 137, 148, 167, 191

Supplemental Security Income 34, 142

Supplementary Medical Insurance program 164, 199

Survivor benefit 2, 5, 109, 192

T

Taxable earnings 30, 48, 96, 123, 138, 173, 192

Taxable payroll 2, 7, 16, 41, 83, 103, 137, 149, 164, 169, 174, 194

Taxable self-employment income 123, 204

Taxable wages 104, 125, 204

Taxation of benefits 4, 41, 121, 169, 177, 197

Taxes 4, 95, 123, 165, 194

Termination 36, 69

Termination rate 6, 36, 106, 156, 191

Test of short-range financial adequacy 30, 202

Total fertility rate 70, 148

Trust fund financial operations 4, 18, 30, 123

Trust fund financial operations, FY 142

Trust fund ratio 7, 29, 40, 49, 129, 145, 206

U

Unemployment projections 88

Unfunded obligation 2, 7, 10, 13, 40, 56, 57, 60, 163, 193, 199, 206

Uninsured persons 121

Unnegotiated check 129, 142
Index

216

V

Valuation period 10, 40, 137, 148, 167, 191

Vocational rehabilitation 41, 127, 143, 169, 177, 190, 194

Y

Year of exhaustion 8, 10, 16, 40, 52
217

STATEMENT OF ACTUARIAL OPINION

It is my opinion that (1) the techniques and methodology used herein to evaluate the financial and actuarial status of the Federal Old-Age and Survivors

Insurance and Disability Insurance Trust Funds are based upon sound principles of actuarial practice and are generally accepted within the actuarial profession; and (2) the assumptions used and the resulting actuarial estimates

are, individually and in the aggregate, reasonable for the purpose of evaluating the financial and actuarial status of the trust funds, taking into consideration the past experience and future expectations for the population, the

economy, and the program.

Stephen C. Goss,

Associate of the Society of Actuaries,

Member of the American Academy of Actuaries,

Chief Actuary, Social Security Administration