Social Security: What Would Happen If the 
Trust Funds Ran Out? 
Christine Scott 
Specialist in Social Policy 
October 21, 2013 
Congressional Research Service 
7-5700 
www.crs.gov 
RL33514 
CRS Report for Congress
Pr
  epared for Members and Committees of Congress        
Social Security: What Would Happen If the Trust Funds Ran Out? 
 
Summary 
The Social Security trust funds are projected to become exhausted in 2033, according to the 2013 
Social Security Trustees Report. If Congress does not act before then, the trust funds would be 
unable to pay full Social Security benefits on time. The Social Security Act does not specify what 
would happen to benefits if the trust funds became insolvent. However, it is clear that full Social 
Security benefits could not be paid on time because the Antideficiency Act prohibits government 
spending in excess of available funds. After insolvency, Social Security would continue to receive 
tax income, from which approximately 77% of benefits could be paid. Either full benefit checks 
would be paid on a delayed schedule or reduced benefits would be paid on time. In either case, 
Social Security beneficiaries and qualifying applicants would remain legally entitled to full 
benefits and could take legal action to claim the balance of their benefits.  
Social Security solvency could be restored by cutting Social Security’s spending, increasing its 
income, or some combination of the two. Over the long range (i.e., over the next 75 years), the 
Social Security trustees estimate that the trust funds have a shortfall of $9.6 trillion in present 
value terms, or 2.72% of taxable payroll. The sooner Congress acts to fill this gap, the smaller the 
changes to Social Security need to be, because earlier changes could be spread to a larger number 
of workers and beneficiaries over a longer period of time. If Congress waits until the moment of 
insolvency to act, the trust funds’ annual deficits could be eliminated with benefit cuts of about 
23% in 2033 that will gradually rise to about 27% by 2087. Congress could also eliminate annual 
deficits by raising the Social Security payroll tax rate from 12.40% to 16.1% in 2033, then 
gradually increasing it to 17.2% by 2086. To maintain annual balance after 2086, larger benefit 
reductions or tax increases would be required. 
Prompt action to restore Social Security solvency would be advantageous. The combined trust 
funds began to run annual cash-flow deficits in 2010. Cash-flow deficits require the redemption 
of government bonds accumulated in earlier years. Cash-flow deficits do not affect Social 
Security directly. However, if the non-Social Security portion of the federal budget is in deficit, 
redemption of trust fund bonds puts additional pressure on the overall federal budget. Earlier 
changes would allow workers and beneficiaries time to adjust their retirement plans. Finally, if 
Congress were to act today, the benefit cuts or tax increases necessary to restore solvency until 
2087 would be smaller than those needed if Congress waited until the trust funds became 
insolvent to act.  
 
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Social Security: What Would Happen If the Trust Funds Ran Out? 
 
Contents 
Introduction ...................................................................................................................................... 1 
Background ...................................................................................................................................... 1 
The Social Security Trust Funds ................................................................................................ 1 
How the Trust Funds Work.................................................................................................. 1 
Historical Trust Fund Operations ........................................................................................ 3 
The Trustees’ Projections .................................................................................................... 4 
Legal Background on Trust Fund Insolvency ............................................................................ 5 
The Antideficiency Act ........................................................................................................ 5 
Legal Entitlement to Social Security Benefits .................................................................... 5 
What Happens to Benefits in the Case of Insolvency?........................................................ 5 
What If Congress Waits to Act? ....................................................................................................... 6 
Benefit Cut Scenario .................................................................................................................. 7 
Size of Benefit Cuts............................................................................................................. 7 
Payroll Tax Increase Scenario ................................................................................................. 12 
Size of Payroll Tax Rate Increases .................................................................................... 12 
Impact of Payroll Tax Increases ........................................................................................ 12 
Conclusion ..................................................................................................................................... 13 
 
Figures 
Figure 1.Scheduled Benefits Payable at Current Law Payroll Tax Rates, 2013-2087 ..................... 8 
Figure 2. Replacement Rates Under Benefit Cut Scenario, 2013-2087 ......................................... 10 
Figure 3. Initial Annual Real Benefits Payable Under Benefit Cut Scenario,  2013-2087 ............ 11 
Figure 4.Combined Payroll Tax Rate Needed To Fund Scheduled Benefits, 2013-2087 .............. 12 
 
Tables 
Table 1. Current Social Security Benefit Payment Schedule ........................................................... 6 
 
Contacts 
Author Contact Information........................................................................................................... 13 
Acknowledgments ......................................................................................................................... 13 
 
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Social Security: What Would Happen If the Trust Funds Ran Out? 
 
Introduction 
Each year when the Social Security trustees release their annual report, attention is focused on the 
trustees’ latest projections of when the Social Security trust funds will become insolvent.1 Less 
attention is paid to what trust fund insolvency would mean. What would happen to benefits? 
What options would Congress have to restore solvency? How would policy changes at this point 
affect beneficiaries? 
There are many misconceptions about what would happen if the Social Security trust funds ran 
out. For example, some Americans may believe that if the trust funds were exhausted, Social 
Security will be completely broke and unable to pay any benefits. This is not the case. In fact, in 
2033, the first year of projected insolvency, the program is projected to have enough income 
(from taxes) to pay about 77% of scheduled benefits. The percentage of scheduled benefits that 
could be paid with income (from taxes) would decline to 72% in 2087, at the end of the trustees’ 
75-year projection period. 
Another myth is that the Social Security Act includes a specific “fail-safe” provision in case of 
trust fund exhaustion—for example, a formula for cutting benefits or raising taxes to eliminate 
annual deficits. This is also untrue. In fact, the act does not specify what would happen to benefits 
if the trust funds are exhausted. The most likely scenario seems to be that benefit checks would be 
delayed. 
This report explains what the Social Security trust funds are and how they work. It describes the 
historical operations of the trust funds and the Social Security trustees’ projections of future 
operations. It explains what could happen if Congress allowed the trust funds to run out. It also 
analyzes two scenarios that assume Congress waits until the moment of insolvency to act, 
showing the magnitude of benefit cuts or tax increases needed and how such changes would 
affect beneficiaries. 
Background 
The Social Security Trust Funds 
How the Trust Funds Work 
Social Security provides retirement, disability, and survivor benefits to qualifying workers and 
their families. These benefits are funded from two trust funds: the Old-Age and Survivors 
Insurance (OASI) trust fund and the Disability Insurance (DI) trust fund. The two funds operate 
separately but are closely linked. This report generally assumes the merged operations of the 
OASI and DI trust funds, treating the two funds as if they were one collective OASDI fund. 
                                                                  
1 The 2013 Trustees Report projected trust fund exhaustion in 2033. Social Security Administration, 2013 Annual 
Report of the Board of Trustees of the Federal Old-Age and Survivors Insurance and Disability Insurance Trust Funds, 
May 31, 2013, at http://www.socialsecurity.gov/OACT/TR/2013. (Hereinafter cited as 2013 Social Security Trustees 
Report.) 
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Social Security: What Would Happen If the Trust Funds Ran Out? 
 
Income to the Trust Funds 
The trust funds receive income from several sources. Their primary income source is the Social 
Security payroll tax levied on wages and self-employment income.2 Social Security-covered 
employees and employers each pay 6.2% of wages up to the taxable maximum ($113,700 in 
2013).3 By law, about 85% of Social Security payroll taxes are credited to the OASI trust fund 
and about 15% are credited to the DI trust fund.4 The trust funds also receive income from 
interest on the trust funds’ assets and from the taxation of Social Security benefits. In 2012, 
83.8% of the trust funds’ income was from payroll taxes, 13.0% was from interest on trust fund 
assets, and 3.2% was from taxation of benefits.5 The proportion of income from each of these 
sources varies over time.6 
Outgo from the Trust Funds 
Almost all of the trust funds’ spending is for benefit payments and a small amount goes toward 
administrative expenses. The trust funds are also party to a financial interchange with the 
Railroad Retirement Board.7 This annual exchange of funds places the Social Security trust funds 
in the same financial position in which they would have been if railroad service had been covered 
by Social Security. In 2012, approximately 98.6% of the trust funds’ spending was for benefits, 
less than 0.8% was for administrative costs, and approximately 0.6% was transferred to the 
Railroad Retirement Board (RRB).8 The trust funds spend essentially the same proportion of 
funds on each of these items each year. 
Annual Cash Flow 
If, in a given year, the trust funds take in more tax income (i.e., payroll taxes and federal income 
taxes paid on benefits) than they spend, the trust funds have a cash-flow surplus. By law, surplus 
revenues are invested in interest-bearing U.S. government securities—usually special issue 
                                                                  
2 Payroll taxes are formally known as Federal Insurance Contributions Act (FICA) and Self-Employment Contributions 
Act (SECA) taxes. FICA and SECA taxes also include a 1.45% payroll tax on each employee and employer for 
Medicare Hospital Insurance (HI), and the additional HI tax for higher-income workers. 
3 Self-employed individuals pay 12.4% of wages up to the taxable maximum. The taxable maximum is indexed to the 
Average Wage Index (AWI). Economists typically attribute both the employee and employer share of the payroll tax to 
workers since it is assumed that the employer portion of the tax is passed on to workers in the form of lower wages. For 
2012, employees and the self-employed paid a lower rate of tax to reflect the 2% payroll tax holiday, with the trust 
funds being reimbursed for the amount of the payroll tax holiday from general funds. 
4 42 U.S.C. §401. 
5 For the OASI trust fund, 82.3% of income was from payroll taxes, 14.1% was from interest on trust fund assets, and 
3.6% was from taxation of benefits in 2012. For the DI trust fund, 93.6% of income was from payroll taxes, 5.8% was 
from interest on trust fund assets, and 0.5% was from taxation of benefits in 2012. (Figures may not add to 100% due to 
rounding.) Payroll tax amount includes the General Fund transfer for the cost of the 2% payroll tax holiday. 
6 The proportion of income from taxation of benefits is projected to increase over time as more people are subject to 
taxation of benefits. (See CRS Report RL32552, Social Security: Calculation and History of Taxing Benefits, by 
Christine Scott.) 
7 See CRS Report RS22350, Railroad Retirement Board: Retirement, Survivor, Disability, Unemployment, and 
Sickness Benefits, by Scott D. Szymendera. 
8 In 2012, about 98.8% of OASI trust fund spending was for benefits, less than 0.5% was for administrative costs, and 
less than 0.6% was transferred to the RRB. In 2012, about 97.6% of DI trust fund spending was for benefits and about 
2.1% was for administrative costs. (Figures may not add to 100% due to rounding.) 
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Social Security: What Would Happen If the Trust Funds Ran Out? 
 
Treasury bonds.9 In other words, Social Security’s cash surpluses (like proceeds from all 
government bonds) are borrowed by the U.S. Treasury and can be used for tax cuts, spending, or 
repaying debt. The Treasury, in turn, incurs an obligation to repay the bonds with interest, which 
is also credited to the trust funds. 
If, in a given year, the trust funds spend more than the tax income they receive, they have a cash-
flow deficit. In deficit years, Social Security can redeem any bonds (including interest) 
accumulated in previous years. Treasury pays benefits with cash from general revenues and writes 
down an equivalent amount of the trust fund’s bond holdings. In other words, when the Treasury’s 
general fund is running a deficit, Congress would need to cut overall spending, raise taxes, or 
borrow during years in which Social Security also has cash-flow deficits. 
Trust Fund Solvency 
If the trust funds are not able to pay all of current expenses out of current tax income and 
accumulated trust fund assets, they are insolvent. Insolvency means that Social Security’s trust 
funds are unable to pay full benefits on time. It does not mean that Social Security will be 
completely broke and unable to pay any benefits. 
Historical Trust Fund Operations 
The OASI trust fund was established in 1937; the DI trust fund was established in 1957. Neither 
of the Social Security trust funds has ever become insolvent. In 2012, the OASI trust fund had a 
cash-flow deficit of about $17.2 billion, and the DI trust fund had a cash-flow deficit of $37.6 
billion, for a combined cash-flow deficit of $54.7 billion. At the end of 2012, the combined trust 
funds held a total of about $2.7 trillion in Treasury bonds.10 
Cash-Flow Surpluses and Deficits 
The trust funds have run annual cash-flow surpluses in most years. These annual surpluses were 
typically small relative to the size of the trust funds’ expenditures. The Social Security 
Amendments of 1983 (P.L. 98-21) increased Social Security trust fund income and reduced trust 
fund spending, resulting in the OASI trust fund beginning to run larger surpluses. Prior to 1984, 
the combined trust funds had run annual cash-flow deficits periodically, the last of which was in 
1983.11 The trust funds made up the difference between income and outgo during these years by 
redeeming some of the bonds accumulated in earlier years. In other words, the Social Security 
trust funds received net transfers from the Treasury’s general fund. 
Near-Insolvency in the Early 1980s 
The Social Security trust funds have never been exhausted. However, in the early 1980s, a 
solvency crisis loomed for the OASI trust fund. The 1982 Social Security Trustees Report 
projected that in the absence of legislative changes the OASI trust fund would become insolvent 
                                                                  
9 See CRS Report RS20607, Social Security: Trust Fund Investment Practices, by Dawn Nuschler. 
10 At the end of 2012, the OASI trust fund held $2.6 trillion and the DI trust fund held $122.7 billion. 
11 See CRS Report RL33028, Social Security: The Trust Fund, by Dawn Nuschler and Gary Sidor. 
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Social Security: What Would Happen If the Trust Funds Ran Out? 
 
by July 1983.12 To relieve the pressure on the OASI trust fund temporarily, Congress permitted 
the fund to borrow from the DI and Medicare Hospital Insurance (HI) trust funds.13 Money was 
transferred to the OASI fund in 1982 and repaid by 1986.14 This temporary measure allowed 
policymakers time to develop a more sustainable solution to Social Security’s solvency 
problem—P.L. 98-21, which (as noted earlier) increased income from taxes and reduced 
benefits.15 Absent another act of Congress, the Social Security Act does not permit further 
interfund borrowing. 
The Trustees’ Projections 
The Social Security trustees issue an annual report in which they describe their short- and long-
range projections of trust fund financial operations. The Trustees Report describes a range of 
possible outcomes using different sets of demographic and economic assumptions, including 
intermediate assumptions, high cost (pessimistic) assumptions, and low cost (optimistic) 
assumptions. Each set of assumptions results in different projections of when the trust funds will 
become insolvent.16 This CRS report focuses on the trustees’ long-range projections under their 
intermediate assumptions, which reflect their “best estimates” of future trends. However, it is 
important to note that the trustees’ projections—like all long-term projections—are uncertain. 
Cash-Flow Projections 
The combined trust funds began to have annual cash-flow deficits in 2010 that are projected to 
continue in future years. When cash-flow deficits emerge, the trust funds need to redeem the 
Treasury bonds accumulated during earlier years. Treasury pays benefits with cash from general 
revenues and writes down an equivalent amount of the trust fund’s bond holdings. Cash-flow 
deficits do not affect Social Security directly. However, if the non-Social Security portion of the 
federal budget is in deficit, redemption of trust fund bonds puts additional pressure on the overall 
federal budget. 
Trust Fund Solvency Projections 
According to the trustees’ intermediate projections, redemption of trust fund assets will allow the 
trust funds to pay full benefits on time until 2033, when the trust funds will become exhausted.17 
At that time, the trust funds will continue to receive tax income (i.e., payroll taxes and federal 
income taxes on benefits). The trustees project that tax income will be sufficient to cover about 
                                                                  
12 Social Security Administration, 1982 Annual Report of the Board of Trustees of the Federal Old-Age and Survivors 
Insurance and Disability Insurance Trust Funds, April 1, 1982. (Hereinafter cited as 1982 Social Security Trustees 
Report.) 
13 P.L. 97-123. 
14 The OASI trust fund borrowed $17.5 billion in November and December of 1982; about $5.1 billion was from the DI 
trust fund and $12.4 billion was from Medicare’s HI trust fund. 
15 P.L. 98-21. 
16 Under the intermediate assumptions, the combined trust funds are projected to become insolvent in 2033. Under the 
low cost assumptions, the trust funds are projected to become insolvent in 2068. Under the high cost assumptions, the 
trust funds are projected to become insolvent in 2027. (2013 Social Security Trustees Report, Table IV.B3.) 
17 Under the trustees’ intermediate assumptions, the OASI trust fund is projected to become insolvent in 2035 and the 
DI trust fund is projected to become insolvent in 2016. 
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77% of scheduled benefits during the first year of trust fund insolvency in 2033. This will decline 
to 72% of scheduled benefits in 2087. 
Legal Background on Trust Fund Insolvency 
The Antideficiency Act 
The Social Security Act specifies that benefit payments shall be made only from the trust funds 
(i.e., accumulated trust fund assets).18 Another law, the Antideficiency Act, prohibits government 
spending in excess of available funds.19 Consequently, if the Social Security trust funds become 
insolvent—that is, if current tax income and accumulated assets are not sufficient to pay the 
benefits to which people are entitled—the law effectively prohibits full Social Security benefits 
from being paid on time. 
Legal Entitlement to Social Security Benefits 
The Social Security Act states that every individual who meets program eligibility requirements is 
entitled to benefits.20 In other words, Social Security is an entitlement program, which means that 
the government is legally obligated to pay Social Security benefits to all those who are eligible 
for them as set forth in the statute.21 If the government fails to pay the benefits stipulated by law, 
beneficiaries could take legal action. Insolvency would not relieve the government of its 
obligation to provide benefits. 
What Happens to Benefits in the Case of Insolvency? 
The Antideficiency Act prohibits government agencies from paying for benefits, goods, or 
services beyond the limit authorized in law for such payments. The authorized limit in law for 
Social Security benefits is the balance of the trust fund. The Social Security Act does not stipulate 
what would happen to benefit payments if the trust funds ran out. As a result, either full benefit 
checks may be paid on a delayed schedule or reduced benefits would be paid on time.22 
To see how a delay could affect beneficiaries, consider the current Social Security benefit 
payment schedule, shown in Table 1. (This schedule may be changed at the discretion of the 
Social Security Commissioner.) New beneficiaries’ payment dates are generally based on their 
day of birth—for example, if a retired worker was born on the first of the month (e.g., June 1); his 
                                                                  
18 42 U.S.C. §401(h). 
19 31 U.S.C. §1341. 
20 42 U.S.C. §§402 and 423. 
21 However, Congress retains the right to modify provisions of the Social Security Act at any time, which could affect 
the benefits current and future beneficiaries may receive. (42 U.S.C. §1304.) For more details, see CRS Report 
RL32822, Social Security Reform: Legal Analysis of Social Security Benefit Entitlement Issues, by Kathleen S. 
Swendiman and Thomas J. Nicola. 
22 It seems most likely that benefits would be delayed (thus reducing the number of full benefit checks paid each 
month). It is unclear whether the Social Security Commissioner or the other trustees would have the authority to reduce 
the benefit amounts specified by law. The 1982 Trustees Report, which projected impending trust fund insolvency, 
stated that unless legislative changes were made, “inability to pay some benefits on time would result.” (1982 Trustees 
Report, p. 2, [emphasis added].) 
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or her benefit check is paid on the second Wednesday in the month.23 If trust fund insolvency 
caused delays in the benefit payment schedule, benefit checks could be paid in the usual order—
first to those who receive benefits on the third of the month, then to those on the second 
Wednesday of the month, and so on, until the remainder of the trust funds’ balance reached zero. 
At that point, no benefits could be paid until more tax receipts were credited to the trust funds. 
Then benefit payments could be picked up where they left off when the trust funds ran out. This 
cycle could continue indefinitely. The timing of these checks would be unpredictable. 
Table 1. Current Social Security Benefit Payment Schedule 
Benefits Paid On
Birth Date of Worker on Whose Record Benefits are Paid
Third of every month 
Any birth date for:
(1) Beneficiaries who receive both Social Security and SSI benefits; 
(2) Most beneficiaries who began to receive benefits prior to May 1997. 
Second Wednesday 
1st to 10th day of the month
Third Wednesday 
11th to 20th day of the month
Fourth Wednesday 
21st to 31st day of the month
Source: Social Security Administration. 
Note: For beneficiaries scheduled to receive payments on the third of the month, benefits may be paid earlier if 
the third is on a weekend or holiday. 
What If Congress Waits to Act? 
There are many options to restore Social Security solvency, which could be combined or targeted 
in a variety of ways. For example, Congress could decrease Social Security spending. Because 
almost 99% of Social Security spending is on benefits, this essentially means cutting benefits. 
Benefit cuts could be applied proportionately to all beneficiaries or structured to protect certain 
beneficiaries (e.g., disabled or low-income beneficiaries). Congress could also increase Social 
Security’s income by raising tax revenue (e.g., raising payroll tax rates or the amount of wages 
taxed), boosting income (e.g., changing trust fund investment practices to increase interest 
income), or adding a new source of revenue (e.g., transferring funds from the Treasury’s general 
fund). Tax increases could be applied proportionately to all workers or targeted to certain workers 
(e.g., those who earn more than the taxable maximum). 
Over the long range (i.e., 75 years), the Social Security trustees project a shortfall of $9.6 trillion 
in present value terms, or 2.72% of taxable payroll. The next section presents two of the policy 
options Congress could choose to fill this gap: 
•  The benefit cut scenario assumes that Congress covers the annual cash-flow 
deficit by cutting benefits across the board. 
•  The tax increase scenario assumes that Congress covers the annual cash-flow 
deficit by raising the payroll tax rate. 
                                                                  
23 For beneficiaries who receive Social Security benefits based on another person’s work record (e.g., spouse benefits), 
their payment date depends on the birth date of the worker on whose record they receive benefits. The current benefit 
payment schedule was first implemented for new beneficiaries in May 1997. By 2033, the number of beneficiaries 
being paid each week of the month will be approximately equal. 
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Both scenarios assume that Congress waits until the trust funds become insolvent to make 
changes. If made sooner, the changes could be smaller, since earlier changes could be spread to a 
larger number of workers and beneficiaries over a longer period of time.24 Either scenario would 
essentially convert Social Security to a pure pay-as-you-go system, in which income and outgo 
are equal on an annual basis and there are no trust fund assets. These scenarios are only two of a 
wide range of possibilities. 
Benefit Cut Scenario 
Size of Benefit Cuts 
If the trust funds were allowed to run out, Congress could eliminate annual cash-flow deficits by 
cutting benefits so that spending equals tax income on an annual basis. According to the trustees, 
achieving annual balance would require benefit cuts of 23% in 2033, the first year of insolvency, 
rising to 28% by 2087. To maintain balance after 2087, the Social Security trustees project that 
larger benefit reductions would be needed, because the aging of the U.S. population, among other 
factors, is causing the cost of Social Security to grow over time. Figure 1 shows the percentage 
of scheduled benefits that are payable each year with scheduled revenues. 
                                                                  
24 The trustees estimate that 75-year solvency could be restored through an immediate payroll tax increase of 2.665 
percentage points (split between employers and employees) or benefit reduction of about 16.5% (for all current and 
future beneficiaries). These changes are about half as large as those that would be required in 2033. (2013 Social 
Security Trustees Report.) 
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Figure 1.Scheduled Benefits Payable at Current Law Payroll Tax Rates, 2013-2087 
120%
100%
fits
ne 80%
 Be
d
dule
he 60%
c
S
 of 
ge
ta
n 40%
e
rc
e
P
20%
0%
Calendar Year
 
Source: Social Security Administration memorandum by Chris Chaplain and Daniel Nickerson, “Present-Law 
OASDI Payable Percentages: Present-Law Revenue as a Percent of the Cost of Providing Scheduled Benefits 
through Year 2087,” July, 2, 2013. (Hereinafter cited as SSA Payable Benefits Memo.) 
Notes: The trustees project that 100% of scheduled benefits could be payable prior to 2033. 
There are several ways to measure how beneficiaries would be affected under the benefit cut 
scenario. This report analyzes projected replacement rates and real benefit amounts for a series of 
hypothetical workers developed by the actuaries at the Social Security Administration (SSA). 
Replacement Rates 
One way to illustrate the effect of across-the-board benefit cuts on beneficiaries is to use 
replacement rates. A replacement rate is a comparison between a person’s earnings before and 
after retirement; it is one way of measuring the adequacy of a person’s post-retirement income. 
Replacement rates can be calculated in different ways. This report uses the same methodology as 
SSA’s actuaries, which is to calculate a worker’s initial Social Security benefit as a percentage of 
his or her average indexed monthly earnings, thus showing the proportion of earnings replaced by 
benefits.25 Benefits replace a higher proportion of lower earners’ wages than of higher earners’ 
wages since the Social Security benefit formula is progressive. In 2013, the estimated 
replacement rate for a medium earner retiring at the age of 65 is 41.7%. Under current law, 
beneficiaries’ replacement rates at the age of 65 are gradually decreasing as the full retirement age 
                                                                  
25 This formula uses the highest 35 years of earnings covered by Social Security, indexed to wage growth using the 
SSA’s Average Wage Index (AWI). 
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(FRA) gradually increases from 65 to 67. Although benefits are available between the ages of 62 
and FRA, the benefit amount is reduced. 
Replacement rates are an important measure of the adequacy of Social Security benefits. Social 
Security was established to replace income lost to a family as a result of the retirement, death, or 
disability of a worker. To ensure that benefit levels keep up with increases in wages over time—
thus providing a steady replacement rate to beneficiaries—initial Social Security benefits are 
indexed to wage growth. Historically, wages have generally risen faster than prices, which have 
allowed the standard of living to rise from one generation to the next.26 Indexing initial Social 
Security benefits to wages has allowed beneficiaries to reap the benefits of rising living standards. 
Replacement rates show the extent to which initial Social Security benefits keep up with wage 
growth and with rising standards of living. 
Figure 2 shows projected replacement rates under the benefit cut scenario for a hypothetical low, 
medium, and high earner claiming retirement benefits at the age 65 of beginning in years 2013 
through 2087.27 The low earner is assumed to have earned 45% of the national average wage 
during each year of his or her career (about $20,172 in 2013) and to receive a monthly Social 
Security benefit of about $922 in 2013.28 The medium earner is assumed to have earned the 
average wage during each year of his or her career (about $44,826 in 2013) and to receive a 
monthly Social Security benefit of about $1,519 in 2013. The high earner is assumed to have 
earned 160% of the average wage during each year of his or her career (about $71,722 in 2013) 
and to receive a monthly Social Security benefit of about $2,016 in 2013. Each year in the graph 
shows the projected replacement rate for each beneficiary if he or she turned 65 years old and 
retired in January of that year. 
Replacement rates for the beneficiaries in this example are projected to decline in the near term. 
Between 2013 and 2033, replacement rates are projected to decrease about 13%.29 This decline is 
mostly due to the increase in the full retirement age over the period. Combining the projected 
percentage of benefits that will be payable (the benefit cut scenario) with the replacement rates 
results in an effective (payable) replacement rate in 2033, the first year of insolvency, being 23% 
lower than if the trust funds were solvent. 
                                                                  
26 The standard of living is usually measured in terms of income and reflects the quality of life that people enjoy, 
including factors such as the quality of housing, medical care, transportation, and communication. 
27 For information on the development of the hypothetical workers, see Social Security Administration, Office of the 
Chief Actuary, Actuarial Note Number 144, “Internal Rates of Return Under the OASDI Program for Hypothetical 
Workers,” by Orlo R. Nichols, et al., June 2001, at http://www.ssa.gov/OACT/NOTES/note2000s/note144.html. 
28 The average wage is defined by SSA’s Average Wage Index. 
29 Initial replacement rates, for individuals retiring at the age of 65, are estimated to be 56.3% for the low earner, 41.7% 
for the medium earner, and 34.6% for the high earner in 2013. 
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Figure 2. Replacement Rates Under Benefit Cut Scenario, 2013-2087 
0.6
0.5
te 0.4
a
 R
ement 0.3
plac
e
ial R 0.2
Init
0.1
0
Calendar Year
 
Source: Congressional Research Service calculations, using figures from the 2013 Social Security Trustees 
Report and the SSA Payable Benefits Memo. 
Notes: The hypothetical earners in this figure are assumed to claim retirement benefits at age 65. The age at 
which workers may receive full Social Security benefits is currently rising from 65 to 67. The early retirement 
increases for workers born after 1937. 
Real Benefit Levels 
Another way to illustrate the effect of across-the-board benefit cuts is to look at projected initial 
annual benefit amounts in real terms (i.e., after adjusting for inflation). Since benefits are based 
on workers’ lifetime earnings, higher earners tend to receive higher benefit amounts than lower 
earners. 
The change in real benefit levels over time illustrates how well Social Security benefits are 
projected to keep up with inflation (i.e., price growth). Figure 3 shows future initial real benefit 
amounts in 2013 dollars—in other words, they illustrate the extent to which future beneficiaries 
could afford today’s living standards. Wages are expected to grow faster than prices over the long 
term, which would allow living standards to rise. Real benefit levels do not show the extent to 
which future beneficiaries could afford these rising living standards. 
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The trustees project that initial Social Security benefits will rise as a result of growing wages, 
causing initial real benefit amounts for individuals claiming retirement benefits at the age of 65 to 
increase about 15.7% between 2013 and 2033.30 
Under the benefit cut scenario, real payable benefit levels are projected to drop significantly after 
the trust funds become insolvent, then to rise gradually. Between 2032, the last full year of 
projected trust fund solvency, and 2033, the first year of projected insolvency, payable real 
benefit levels are projected to decline by 23%.31 
Figure 3. Initial Annual Real Benefits Payable Under Benefit Cut Scenario,  
2013-2087 
$40,000
$35,000
$30,000
ble $25,000
ya
a
 P
fits $20,000
ne
l Be
a $15,000
Re
l 
nnua $10,000
A
$5,000
$0
Calendar Year
 
Source: Congressional Research Service calculations, using figures from the 2013 Social Security Trustees Report 
and the SSA Payable Benefits Memo. 
Note: Please see notes for Figure 2. 
                                                                  
30 Annual real benefits for individuals retiring at age 65 are estimated to be $11,070 for the low earner, $18,234 for the 
medium earner, and $24,196 for the high earner in 2013. 
31 In 2033, annual scheduled real benefits for individuals retiring at age 65 are projected to be $12,809 for the low 
earner, $21,108 for the medium earner, and $27,968 for the high earner. The annual payable real benefits would be 
77% of these amounts. 
Congressional Research Service 
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Social Security: What Would Happen If the Trust Funds Ran Out? 
 
Payroll Tax Increase Scenario 
Size of Payroll Tax Rate Increases 
Congress could also eliminate cash-flow deficits by raising the payroll tax rate so that the trust 
funds’ tax income would equal spending each year. The trustees project that taking such an action 
at the point of insolvency would require combined employee and employer payroll taxes to 
increase from their current rate of 12.4% to 16.1% in 2033, the year in which the trust funds are 
projected to be exhausted, rising to 17.2% by 2087, the last year of the 75-year projection period. 
To maintain balance after 2087, the Social Security trustees project that the payroll tax rate would 
likely need to increase further. This is because the cost of Social Security is expected to grow, due 
to U.S. population aging and the design of the Social Security system. Figure 4 shows the payroll 
tax rates needed to pay scheduled benefits each year from 2013 to 2087. 
Figure 4.Combined Payroll Tax Rate Needed To Fund Scheduled Benefits, 2013-2087 
20.00%
18.00%
te 16.00%
a
Tax R 14.00%
ll 
yro
a 12.00%
y P
rit
u 10.00%
l Sec 8.00%
cia
 So
ed 6.00%
in
mb
o 4.00%
C
2.00%
0.00%
Calendar Year
 
Source: CRS calculations, using figures from the 2013 Social Security Trustees Report. 
Note: The trustees project that more than 100% of scheduled benefits could be payable prior to 2033. 
Impact of Payroll Tax Increases 
Raising the payroll tax rate would increase most workers’ taxes by the same proportion. However, 
because covered wages are taxable only up to a specified maximum ($113,700 in 2013), the 
effective increase in the payroll tax would be smaller for people who earn more than the taxable 
maximum than for other workers. Unlike the federal income tax, the Social Security payroll tax is 
levied at a flat rate starting at the first dollar of wages. 
Congressional Research Service 
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Social Security: What Would Happen If the Trust Funds Ran Out? 
 
Conclusion 
The consequences of allowing the trust funds to become insolvent can be avoided if Congress 
makes changes to Social Security. The sooner Congress acts, the smaller the changes need to be. 
If Congress acted today, the benefit cuts or tax increases necessary to restore solvency until 2087 
would be about half as large as those needed if Congress waited until the trust funds became 
insolvent. Prompt action would also allow Congress to gradually phase in changes, rather than 
abruptly cutting benefits or raising taxes, thus allowing workers to plan in advance for their 
retirements. Although the combined trust funds began to run annual cash-flow deficits each year 
beginning in 2010, requiring the trust funds to redeem the bonds that they have accumulated in 
surplus years, the cash-flow deficits do not affect Social Security directly. However, if the non-
Social Security portion of the federal budget is in deficit, redemption of the trust fund bonds puts 
additional pressure on the overall federal budget. 
 
Author Contact Information 
 
Christine Scott 
   
 
Specialist in Social Policy 
cscott@crs.loc.gov, 7-7366 
 
Acknowledgments 
An earlier version of this report was written by Kathleen Romig, a former CRS analyst. All questions 
should be directed to the current author. 
 
Congressional Research Service 
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