Payroll taxes are the main source of financing for Social Security-- which includes OASI and DI--and for the HI program in Medicare-- also referred to as Medicare part A. The payroll taxes for these programs are levied on wages and on the net self-employment income of workers under the Federal Insurance Contributions Act (FICA) and the Self-Employment Contributions Act (SECA). Although Social Security is often discussed as a retirement program, Social Security (OASDI) is a social insurance program that provides cash payments to persons or families to replace income lost through retirement, death, or disability. Workers make "contributions" in the form of payroll taxes that are then credited by the Treasury to the Social Security trust funds. Once individuals have worked a sufficient time to qualify, they become eligible for benefits under the program. enrollees (about 25 percent of total annual funding) and appropriations of general funds (about 75 percent of total funding). While both the Social Security OASDI and Medicare HI are overwhelmingly financed by payroll taxes, those trust funds receive some general revenues in the form of income taxes paid on a portion of the Social Security benefits of upper-income retirees. Collection of the payroll taxes that fund OASDI and Medicare HI is administered by IRS. However, because these payroll taxes are earmarked to fund specific retirement, disability, and medical benefits for which workers become eligible through their qualified employment, they are fundamentally different from income taxes, which are imposed on certain segments of the population and which are not earmarked for any specific purpose. HI tax is 2.9 percent, divided evenly between the employee and the employer. Until 1994, the wage base for HI was identical to that for OASDI. Since 1994, however, the HI tax has been imposed on all of a worker's wages and self-employment earnings. Figure 1 illustrates the flow of payroll taxes into the Social Security and Medicare trust funds. income wage earners replace a larger portion of their earnings than do the payments to higher wage earners. As with retirement benefits, a number of rules apply in determining who is eligible for disability benefits. Generally, a disability is defined as the inability to engage in "substantial gainful activity" by reason of physical or mental impairment. Workers who have become fully qualified for OASI benefits and who become disabled are also generally qualified for disability benefits. Workers who become disabled before becoming fully qualified for OASI benefits may nevertheless qualify for disability benefits under certain circumstances. Payments to disabled individuals, like those to retirees, take into account personal work histories and wages earned. As with retirement benefits, lower wage earners have a larger portion of their wages replaced than do higher wage earners. individual. For certain types of medical services, patients may be required to pay deductibles or additional charges. Under current law, employers withhold OASDI and HI payroll taxes from employees' pay along with federal and state income taxes, if any. Both the employees' and the employers' shares of FICA taxes are deposited--along with other federal taxes--to a designated Federal Reserve bank or other authorized depository. All federal taxes are then deposited in the Treasury. Treasury credits the Social Security and HI trust funds for the applicable amounts. Neither eligibility for benefits nor the amount of benefits is based on the amount of taxes paid by an individual, and neither IRS nor the Social Security Administration (SSA) directly credits to the individual the annual and cumulative FICA taxes paid by or on behalf of each individual. Cumulatively, the OASDI and HI taxes collected represent dedicated receipts. They are accounted for in earmarked funds: the Social Security OASI trust fund, Social Security DI trust fund, and Medicare HI trust fund. These trust funds hold funds in the form of special nonmarketable U.S. Treasury securities that are backed by the full faith and credit of the U.S. government. They are an asset to the trust fund and a legal claim on--or an obligation of--the general fund of the Treasury. When benefits are to be paid, securities sufficient to fund those benefits are redeemed, and benefits are paid by the Treasury. trust funds earn interest on the funds lent to the Treasury. This interest is paid in the form of additional Treasury securities. Until 1983, program revenues and expenses were closely matched, and the reserves were modest. After the 1983 Social Security Commission recommendations were enacted, balances grew. As a result, interest credits have become a more important source of revenue for the OASDI trust funds. As we have reported, both Social Security and Medicare face serious financing challenges. Today, taxes paid into the trust funds exceed benefits paid out. However, as more and more of the "baby boom" generation enters retirement, this will change. The combination of a larger elderly population, increased longevity, and rising health care costs will drive significant increases in health and retirement spending when the "baby boom" generation begins to retire. Over the long term, the trust funds are not solvent. SSA projections show that, absent a change in the structure of the program, the OASDI trust funds will only be able to pay full benefits through 2037. However, as we have reported, because a trust fund's accumulated balance does not necessarily reflect the full future cost of existing government commitments, it is not an adequate measure of the fund's solvency or the program's sustainability. The cash flows for these programs will create pressure on the federal budget long before these so-called trust fund exhaustion dates. securities and pay benefits, the government would have to raise taxes, cut spending for other programs, increase borrowing from the public, or retire less debt (if there is a surplus)--or some combination of these. As the Comptroller General testified last month, our long-term simulations show that, absent a change in the design of Social Security and Medicare, ultimately the government would do little more than mail checks to the elderly and their healthcare providers. The EITC is a refundable tax credit established by Congress in 1975. The credit offsets the impact of Social Security taxes paid by low- income workers and encourages low-income persons to seek work rather than welfare. The EITC is available to taxpayers with and without children and depends on the nature and amount of qualifying income and on the number of children who meet age, relationship, and residency tests. The amount of EITC allowed to an individual is first applied as a payment against any income tax liability of that individual. Any remaining amount is refunded to the individual. Workers can receive the credit as a lump sum payment after filing an income tax return or in advance as part of their paycheck. Table 2 shows, for the past 3 years, the number of EITC recipients, the relatively small number of those who reported receiving an advance EITC, and the total EITC amount. In December 1998, the Council of Economic Advisers concluded that "the EITC is one of our most successful programs for fighting poverty and encouraging work." Among other things, the report said that the EITC had lifted 4.3 million Americans out of poverty in 1997, had reduced the number of children living in poverty that year by 2.2 million, and had increased the labor force participation of single mothers. For many EITC recipients, the credit is more than enough to fully offset Social Security taxes. Most EITC recipients earn credits that exceed their income tax liabilities. The Joint Committee on Taxation has estimated that 87 percent of the credit earned in 2000 will be refunded as direct payments to taxpayers. For many of the recipients these refunds will be more than enough to offset their payroll tax burdens. For example, a head-of-household filer who has two children and earns $15,000 in wages would have earned an EITC of $3,396 in 2000. This amount would have exceeded her precredit income tax liability of $24 plus her $1,148 portion of payroll tax liability. It would also have been more than enough to offset her employer's $1,148 share of the payroll tax, which most economists believe to be borne by the employee. However, many low-income individuals and couples, especially those without children, do not earn the EITC. Looking at all low-income taxpayers together, the Congressional Budget Office estimated that in 1999 households with cash incomes between zero and $10,000, on average, received EITC refunds equal to 4.1 percent of their incomes. This average refunded credit was enough to offset the average payroll tax liability of these households, but it would not have completely offset the burden of the employer's portion of the payroll tax. The average refunded credit for households with cash incomes between $10,000 and $20,000 typically would not have been sufficient to offset any of the employer's share of the payroll tax and only a portion of the employee's share for those households. Since 1995, we have identified EITC noncompliance as one of the high-risk areas within IRS because such noncompliance exposes the federal government to billions of dollars of risk through overpayments of the EITC. Although IRS has estimated that billions of dollars have been overpaid to EITC recipients, it has not reported on the portions of noncompliance that may be due to unintentional errors, perhaps attributable at least in part to the complexity of the EITC, or to fraudulent efforts to obtain the credit. In April 1997 and September 2000, respectively, IRS reported on the results of two EITC compliance studies--the first involving tax year 1994 EITC claims accepted by IRS between January 15 and April 21, 1995, and the second involving tax year 1997 claims processed by IRS between January 20 and May 29, 1998. Although changes in IRS' study methodology as well as legislative changes between 1994 and 1997 made the results of the two studies noncomparable, both studies documented a significant amount of EITC noncompliance. Of $17.2 billion in EITC claimed during the first study period, IRS estimated that $4.4 billion (about 26 percent) was overclaimed. Of $30.3 billion in EITC claimed during the second study period, IRS estimated that $9.3 billion (about 31 percent) was overclaimed. The largest source of taxpayer error identified by IRS in both studies related to EITC requirements that are difficult for IRS to verify-- principally those related to eligibility of qualifying children. Currently, to be a qualifying child, a child must (1) be the taxpayer's son, daughter, adopted child, grandchild, stepchild, or eligible foster child (i.e., meet a relationship test); (2) be under age 19, under age 24 and a full-time student, or any age and permanently and totally disabled (i.e., meet an age test); and (3) have lived with the taxpayer in the United States for more than half the year or for the entire year if an eligible foster child (i.e., meet a residency test). Failure to meet the residency test was the most common qualifying child error identified in both studies. IRS' studies identified the following as other sources of EITC errors. Complicated living arrangements--when a child meets the rules to be a qualifying child of more than one person, the person with the higher modified adjusted gross income (AGI) is the only one who can claim the EITC using that child. The person with the lower modified AGI cannot use that child to claim the EITC even if the other person does not claim the EITC. This rule does not apply if the other person is the taxpayer's spouse and they file a joint return. Misreporting of filing status--these errors involved married taxpayers filing as single or head of household when they should have filed as married filing separately. Persons who file as married filing separately are not eligible to claim the EITC. Income misreporting--these errors included misreporting of earned income and underreporting of investment income. EITC "noncompliance" as identified in IRS' studies and as referred to in this testimony includes errors caused by mistakes--possibly due to the complexity of the EITC--or an intent to defraud. Both of these potential sources of error have been of concern to IRS and others. Some analysts consider the EITC to be a complex tax provision that challenges those applying for it to properly understand and follow the qualifying rules. On the other hand, the credit's possible susceptibility to fraud has also been a concern to Congress and IRS for many years. Although being able to differentiate between these different causes may be important in identifying appropriate corrective measures, IRS' primary goal in conducting its compliance studies was to identify the level of overall EITC noncompliance. Determining the causes of overpayments is more challenging and costly, especially determining whether an EITC claim is fraudulent, which requires knowing the difficult-to- prove intent behind the taxpayer's actions. IRS' reports on its two compliance studies did not discuss the extent to which EITC overclaims were due to mistakes versus fraud. However, as we discussed in a July 1998 report on IRS' first study, IRS examiners and case reviewers did make a determination of intent for almost every case involving an overclaim. Based on those determinations, about one-half of the returns with an EITC overclaim and two-thirds of the total amount overclaimed were considered to be the result of intentional errors. Because these assessments were judgmental and made without any specific criteria, they were considered too imprecise to be included in IRS' report. However, as we said in 1998, the results did indicate that IRS' compliance efforts should include activities aimed at taxpayers who intentionally misclaim the EITC. Concerned about the level of EITC noncompliance, Congress and IRS have taken various steps to reduce it. After the 1994 compliance study, Congress took the following steps: According to law, an EITC is not to be allowed unless the tax return contains the EITC-qualifying-child's Social Security number (SSN) as well as the SSNs of the taxpayer and the taxpayer's spouse, if any. Before 1997, if IRS identified a return with an invalid SSN, it had to resolve that issue through its normal audit procedures. Because those procedures are resource intensive, IRS was not able to follow up on most of the invalid SSNs identified. In 1995, for example, IRS stopped the refunds on about 3 million returns with invalid SSNs. However, IRS was only able to follow up with taxpayers on about 700,000 of those returns. For the other 2.3 million returns, IRS released the refunds without any follow-up. In 1996, Congress authorized IRS to treat invalid SSNs as "math errors," similar to the way that IRS had historically handled computational mistakes. With that authority, IRS has been able to (1) automatically disallow any EITC claim associated with an invalid SSN and (2) make appropriate adjustments to any refund that the taxpayer might be claiming. collect SSNs of birth parents and provide IRS with information linking the parents' and child's SSNs. Congress began providing IRS with appropriated funds (about $143 million a year) for a 5-year EITC compliance initiative beginning in fiscal year 1998. As part of the 5-year compliance initiative and using the tools provided by Congress, IRS implemented a plan that calls for reducing EITC noncompliance through expanded customer service and public outreach, strengthened enforcement, and enhanced research. In implementing its plan, IRS has taken several actions, with some significant results. For example: In 1999 and 2000, IRS identified a total of about 3.4 million "math errors" related to the EITC, about 24 percent of which involved invalid SSNs.According to IRS, it denied about $675 million in erroneous EITC claims during fiscal years 1999 and 2000 because of EITC-related "math errors." Other types of EITC noncompliance are not as easy to identify as invalid SSNs. These types of noncompliance can be detected only through an in- depth review. For the past few years, IRS has targeted for in-depth review certain types of EITC claims, such as those involving the use of a child's SSN on multiple returns for the same year, that IRS had identified as important sources of noncompliance. Returns identified by IRS were to be audited to determine if the EITC claims were valid. During fiscal years 1999 and 2000, according to IRS, it completed more than 500,000 of these audits and identified about $800 million in overclaims. about $435,000 for 143 of those preparers. We do not know how, if at all, IRS' visits resulted in improved due diligence by preparers. That question may be addressed in IRS' report on the results of its visits, which, according to IRS, will be issued about May 1. IRS implemented a program to enforce the recertification requirements of the Taxpayer Relief Act of 1997. According to IRS data, (1) about 312,000 taxpayers were required to recertify after being denied the EITC for tax year 1997 and (2) about 193,000 of those taxpayer did not claim the EITC on their tax year 1998 returns. IRS sees these results as an indication that recertification has reduced the number of improper claims. IRS expanded its EITC outreach and educational efforts. For example, it developed partnerships with groups that are advocates for low-income taxpayers and with businesses and large employers who include EITC information in monthly billings or employees' pay statements. IRS also refocused its media campaign and publications toward educating the public about EITC eligibility requirements. IRS developed a database that can be used to help verify the accuracy of taxpayers' claimed dependents and EIC-qualifying children. It incorporates data from an assortment of sources including the HHS and SSA information provided for in the 1997 Act. According to IRS, the database is used to screen returns during processing for potential compliance issues and to select for pre-refund audits those with the highest potential. Also, according to IRS, the returns being selected are primarily ones filed by EITC claimants. Despite these initiatives, it remains to be seen how, if at all, Congress' and IRS' efforts have succeeded in reducing the 31- percent EITC overclaim rate identified by IRS' tax year 1997 EITC compliance study. IRS is doing a study of tax year 1999 returns and plans to study tax year 2001 returns. The results of those studies, when compared to the results of the tax year 1997 study, should provide a basis for assessing the impact on overall EITC noncompliance. Although well-designed and effectively-implemented processes should help reduce EITC noncompliance, certain features of the EITC represent a trade-off between compliance and other desired goals. Unlike income transfer programs, such as Temporary Assistance for Needy Families and Food Stamps, the EITC was designed to be administered through the tax system. Accordingly, while other income transfer programs have staff who review documents and other evidence before judging applicants to be qualified to receive assistance, the EITC relies more directly on the self-reported qualifications of individuals. This approach generally should result in lower administrative costs and possibly higher participation rates for the EITC than the other assistance programs. However, EITC noncompliance may also be higher. This is especially true when eligibility depends on information that cannot be readily and rapidly verified by IRS as it processes tax returns. EITC eligibility, particularly related to qualifying children, is difficult for IRS to verify through its traditional enforcement procedures, such as matching return data to third-party information reports. Correctly applying the residency test, for example, often involves understanding complex living arrangements and child custody issues. Thoroughly verifying qualifying child eligibility basically requires IRS to audit individual tax returns, as was done in the tax year 1994 compliance study--a costly, time-consuming, and intrusive proposition. - - - - - I appreciate this opportunity to appear today to provide a basic description of the payroll taxes funding Social Security and Medicare hospital insurance and to discuss what is known about EITC noncompliance. Mr. Chairman, that concludes my prepared statement. I would be happy to answer any questions you or other Members of the Committee might have. contributions to this testimony included David Attianese, Kenneth Bombara, Christine Bonham, Barbara Bovbjerg, Carol Henn, Susan Irving, Deborah Junod, and John Lesser. Long-Term Budget Issues: Moving From Balancing the Budget to Balancing Fiscal Risk (GAO-01-385T, Feb. 6, 2001). Federal Trust and Other Earmarked Funds: Answers to Frequently Asked Questions (GAO-01-199SP, January 2001). Medicare Reform: Issues Associated With General Revenue Financing (GAO/T-AIMD-00-126, Mar. 27, 2000). Medicare Reform: Leading Proposals Lay Groundwork, While Design Decisions Lie Ahead (GAO/T-HEHS/AIMD-00-103, Feb. 24, 2000). Social Security: Evaluating Reform Proposals (GAO/AIMD/HEHS- 00-29, Nov. 4, 1999). Social Security Reform: Implementation Issues for Individual Accounts (GAO/HEHS-99-122, June 18, 1999). Social Security: Different Approaches for Addressing Program Solvency (GAO/HEHS-98-33, July 22, 1998). Tax Administration: Assessment of IRS' 2000 Tax Filing Season (GAO-01-158, Dec. 22, 2000). Earned Income Credit: IRS' Tax Year 1994 Compliance Study and Recent Efforts to Reduce Noncompliance (GAO/GGD-98-150, July 28, 1998). Tax Administration: Earned Income Credit Noncompliance (GAO/T- GGD-97-105, May 8, 1997).

Summary:
This testimony discusses (1) how payroll taxes fund Social Security and the Medicare Hospital Insurance (HI) programs and (2) noncompliance associated with the Earned Income Tax Credit (EITC) and efforts to deal with that noncompliance. Payroll taxes fund the Social Security Program and the Medicare HI program. These taxes are paid in equal portions by employees and their employers. Employees and their families become eligible to collect these benefits once workers have been employed for a sufficient period of time. Although Social Security benefits are calculated using a formula that considers lifetime earnings, HI benefits are based on the health of the covered individual and are paid directly to the health care provider. Demographic trends indicate that these programs will impose an increasing burden on the federal budget and the overall economy. Regarding EITC, significant compliance problems can expose the Internal Revenue Service (IRS) to billions of dollars in overpayments. EITC noncompliance is identified as taxpayer errors and intent to defraud. IRS and Congress have taken several steps to reduce noncompliance, including the passage of laws that enabled IRS to disallow EITC claims with invalid social security numbers and the implementation of a five-year EITC compliance initiative.