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October 5, 2021
Social Security: Selected Findings of the 2021 Annual Report
According to the recent report of the Board of Trustees of 
reflect their best estimate of future economic, demographic, 
the Social Security Trust Funds, the program’s finances are 
and program-specific factors. 
in a similar, albeit marginally worse, position in 2021 to 
what they were in 2020. Under intermediate assumptions, 
Table 1. Key Dates Projected for the Social Security 
the projected combined Trust Fund asset depletion date is 
Trust Funds in the 2020 and 2021 Trustees Reports 
2034 (versus 2035 in last year’s report), after which the 
(under the trustees’ intermediate assumptions) 
percentage of benefits payable would be 78% (versus 79% 
 
2020 Report 
2021 Report 
in 2020).  
 
OASI  DI 
OASDI  OASI 
DI  OASDI 
Social Security Overview 
Cost exceeds 
noninterest  2010  2041 
2010 
2010  2040  2010 
Social Security is a self-financing program that in 2021 
revenues 
covers approximately 176 million workers and provides 
Cost exceeds 
monthly cash benefits to over 65 million beneficiaries. It is 
total 
2021  2047 
2021 
2021  2045  2021 
the federal government’s largest program in terms of both 
revenues 
the number of people affected (i.e., covered workers and 
Trust fund 
beneficiaries) and its finances. Social Security is composed 
reserves 
2034  2065 
2035 
2033  2057  2034 
of Old-Age and Survivors Insurance (OASI) and Disability 
depleted 
Insurance (DI), referred to collectively as OASDI.  
Source: CRS, based on the 2020 and 2021 OASDI Trustees Report. 
The OASDI program is primarily financed (89.6% of total 
In the 2021 report, the trustees project a date of 2033 for 
revenues in 2020) through a payroll tax applied to Social 
OASI Trust Fund reserve depletion and a noticeably 
Security–covered earnings up to an annual limit. In 
changed date of 2057 for DI Trust Fund reserve depletion. 
addition, some beneficiaries pay income tax on a portion of 
As stated, “For the third year in a row, there has been 
their Social Security benefits, accounting for 3.6% of total 
significant change in the DI reserve depletion date because 
revenue in 2020. From 1983 to 2009, the OASDI program 
the DI reserve depletion date is very sensitive to changes in 
collected more in tax revenues than needed to pay benefits. 
program cash flows, and there is now less revenue projected 
Excess revenues are held in interest-bearing U.S. Treasury 
in the near term for the DI program than was expected in 
securities, providing a third source of funding for the 
last year’s report. Nevertheless, the DI program has 
program. In 2020, interest revenues accounted for 6.8% of 
continued to have low levels of disability applications and 
total revenues. Monthly benefits are the largest OASDI 
benefit awards for 2020.” 
program cost, accounting for 99.0% of total costs in 2020. 
Administrative and other costs accounted for the remainder. 
In the previous year’s (2020) report, as shown in Table 2, 
The Trust Funds 
the trustees projected that the trust funds’ overall balance 
(i.e., the total amount of accumulated asset reserves) would 
Both the OASI and DI programs use a trust fund financing 
increase slightly. Asset reserves held in the trust funds 
mechanism. Monies credited to these trust funds are 
increased more than expected during 2020 owing to larger-
earmarked for paying Social Security benefits and certain 
than-projected revenues and lower-than-projected costs. 
administrative costs. Using a trust fund allows OASI and DI 
programs to track their respective programs’ revenues and 
Table 2. Financial Operations for the Social Security 
costs and to hold any accumulated assets from years when 
Trust Funds in the 2020 and 2021 Trustees Reports 
revenues exceed costs. The OASI Trust Fund and DI Trust 
(in bil ions; under the trustees’ intermediate assumptions) 
Fund are legally distinct entities; they are discussed here 
collectively as the OASDI Trust Funds, or the trust funds. 
2020 
2020 
2021 
 
(projected)  (actual)  (projected) 
A Board of Trustees manages the trust funds. The trustees 
Starting Trust Funds’ 
$2,897.4 
$2,897.4 
$2,908.3 
are required to report to Congress annually on the trust 
Reserves 
funds’ status and financial operations. In general, the trust 
Total Revenue 
1,116.4 
1,118.1 
1,073.8 
funds’ solvency—the ability to pay full benefits scheduled 
Total Costs 
1,112.0 
1,107.2 
1,151.0 
under current law on a timely basis—indicates their status. 
Change in Trust Funds’ 
4.4 
10.9 
-77.3 
If assets held in the trust funds were to be depleted, the 
Reserves 
OASDI program could pay out in benefits only what it 
Ending Trust Funds’ 
2,901.8 
2,908.3 
2,831.0 
receives in revenues. Table 1 shows the trust funds’ key 
Reserves 
dates under the trustees’ intermediate assumptions, which 
Source: CRS, based on the 2020 and 2021 OASDI Trustees Report. 
https://crsreports.congress.gov 
 link to page 1  link to page 2 Social Security: Selected Findings of the 2021 Annual Report 
Since 2010, costs (i.e., scheduled benefits) have exceeded 
resulted in the ultimate fertility rate being reached 25 years 
noninterest revenue (i.e., tax revenues). In last year’s 
later than projected last year, increasing the actuarial 
report, the trustees projected that total costs would exceed 
deficit. Updates to the civilian labor force model to reflect 
total revenues (i.e., tax revenues and interest revenue) in 
new economic data lowered projected labor force 
2021. The same projection is made in this year’s report 
participation rates, worsening the actuarial balance. Updates 
(Table 1). If this projection were to be realized, the effect 
to the methodology for projecting average benefit levels 
would be a decrease in trust fund asset reserves. As such, 
and Department of the Treasury tax information that 
trust fund asset reserves are predicted to decline from a 
indicated future lower levels of revenue from taxation of 
peak value of $2.91 trillion in 2021 to $0 in 2034. Upon the 
Social Security benefits also contributed, among other 
trust funds’ asset reserves depletion, the trustees project that 
factors, to the increase in the actuarial deficit.   
income from tax revenues would be sufficient to pay 
approximately 78% of scheduled benefits for the remainder 
Annual Balances 
of the projection period (2021-2095) versus 79% in 2020. 
In the 2021 annual report, the trustees project the annual 
balances (i.e., difference between revenues and costs on an 
Projected Long-Range Financial Outlook 
annual basis) to reflect a larger deficit for most (i.e., 2021-
The 2021 annual report projects a long-range funding 
2089) years in the projection period. The trustees attribute 
shortfall. The funding shortfall is largely a result of rising 
the changes in annual balances to the changes in fertility 
costs over the 75-year projection period, primarily due to 
methodology and assumptions. Over the 75-year projection 
demographic trends. The ratio of OASDI beneficiaries per 
period, annual balances are lower than last year’s report by 
100 covered workers, a common indicator of rising costs, is 
an average of 0.23 percentage point. 
projected to remain relatively the same as that in the 2020 
annual report. The 2020 report projected an average of 45.4 
COVID-19 
beneficiaries per 100 covered workers over the 75-year 
The 2021 report confined the “significant” pandemic-
projection; the 2021 annual report projects this ratio to be 
related effects to the near term; last year’s report did not 
45.5 beneficiaries per 100 covered workers. Although the 
include potential COVID-19 effects. The 2021 intermediate 
projected ratio of beneficiaries to workers remains 
assumptions project economic recovery by 2023. By the 
relatively the same, program costs are projected to grow 
mid-2020s, most demographic factors (i.e., fertility, 
faster than program revenues. In 2020, the trustees 
mortality, immigration) are assumed to return to the rates 
estimated that costs would exceed revenues by 21.7% over 
that would have been estimated absent the pandemic. 
the projection period. In 2021, the trustees estimate that 
costs will exceed revenues by 22.7% over the next 75 years.  
What Can Be Done? 
The trustees project that in 13 years Social Security will be 
If the total program revenues were to exceed total costs 
unable to pay scheduled benefits in full and on time. To 
annually, the program would have a surplus; if the total 
illustrate the magnitude of changes needed to make Social 
program costs were to exceed the total revenues, the 
Security solvent over the next 75 years, the trustees 
program would have a deficit. The trustees project the 
estimate the hypothetical payroll tax increase or 
program to have a deficit in 2021—the first since 1982—
hypothetical benefit reduction needed to maintain solvency 
and for all remaining years in the 75-year projection period.  
(Table 3). These hypothetical changes would take 
immediate effect and apply to all current and future 
The actuarial balance, a summarized measure of the annual 
beneficiaries. The table also shows estimates for changes 
surpluses and deficits over the projection period, is the 
that would be needed at the projected 2034 insolvency date. 
Social Security program’s long-range financial position. 
When the actuarial balance results in higher costs than 
Table 3. Hypothetical Measures to Maintain Solvency 
revenues over the projection period, the program is 
(in percentage points [pp]) 
described as having an actuarial deficit. In 2020, the 
 
2020 Report 
2021 Report 
trustees estimated the long-range actuarial deficit over the 
 
2020 
2035 
2021 
2034 
next 75 years to average 3.21% of taxable payroll (i.e., total 
Payrol  Tax Increase  3.14 pp 
4.13 pp  3.36 pp  4.20 pp 
earnings subject to the OASDI payroll tax with some 
Scheduled Benefit 
adjustments). In 2021, the trustees estimated the long-range 
Reduction 
19% 
25% 
21% 
26% 
actuarial deficit over the next 75 years to average 3.54% of 
Source: CRS, based on the 2020 and 2021 OASDI Trustees Report. 
taxable payroll. This amount represents the average 
increase in the payroll tax over the 75-year projection 
period that would be needed for the program to pay full 
In the 2021 report, the size of the payroll tax increase and 
scheduled benefits on time.  
benefit reduction needed to maintain solvency are larger 
than estimated in 2020. A noted parallel to last year’s report 
The change in the estimated actuarial deficit, an increase of 
is that as time elapses, the magnitude of the changes needed 
0.33% of taxable payroll, is mainly attributable to a change 
to maintain Social Security solvency increases. This 
in valuation period and to changes in methods and 
characteristic is attributable to the program’s rising costs 
programmatic data. The shifting of the 75-year valuation 
and suggests that the portfolio of legislative options to 
period from 2020-2094 to 2021-2095 means that a large 
achieve solvency decreases as the trust funds approach the 
negative annual balance for 2095 is now included in the 
projected depletion date. As in many previous reports, the 
actuarial balance. Several factors contributed to changes in 
trustees state, “Implementing changes sooner rather than 
methods and programmatic data. A new fertility model 
later would allow more generations to share in the needed 
revenue increases or reductions in scheduled benefits.”
https://crsreports.congress.gov 
Social Security: Selected Findings of the 2021 Annual Report 
 
IF11939
Barry F. Huston, Analyst in Social Policy   
 
 
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https://crsreports.congress.gov | IF11939 · VERSION 1 · NEW