2007 OASDI Trustees Report

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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 persons 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 2006 is also shown in table VI.A1.

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
1984 1
37,800
5.700
5.200
.500
 
11.4000
10.4000
1.0000
1985 1
39,600
5.700
5.200
.500
 
11.4000
10.4000
1.0000
 
1986 1
42,000
5.700
5.200
.500
 
11.4000
10.4000
1.0000
1987 1
43,800
5.700
5.200
.500
 
11.4000
10.4000
1.0000
1988 1
45,000
6.060
5.530
.530
 
12.1200
11.0600
1.0600
1989 1
$48,000
6.060
5.530
.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
94,200
6.200
5.300
.900
 
12.4000
10.6000
1.8000
2007
97,500
6.200
5.300
.900
 
12.4000
10.6000
1.8000
2008 and later
2/
6.200
5.300
.900
 
12.4000
10.6000
1.8000

1In 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 self-employment 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.

2Subject to automatic adjustment based on increases in average wages.

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 of each calendar quarter, with no reimbursement to the general fund for interest costs attributable to the advance transfers.2 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.3

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.

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.

Table VI.A2.-Historical Operations of the OASI Trust Fund,
Calendar Years 1937-2006 

[Amounts in billions]

Calendar
year
Income 
 
Expenditures
 
Assets
Total1 
Net
contri-
butions2
Taxa-
tion of
benefits
Net
inter-
est 3
Total
Benefit pay-
ments 4
Admin-
istra-
tive
costs
RRB
inter-
change
Net
increase during
year
Amount
at end
of year
Trust
Fund
ratio 5
 
1937
$0.8
$0.8
-
6/
 
6/
6/
-
-
 
$0.8
$0.8
100
 
1938
.4
.4
-
6/
 
6/
6/
-
-
 
.4
1.1
7,660
 
1939
.6
.6
-
6/
 
6/
6/
-
-
 
.6
1.7
8,086
                             
 
1940
.4
.3
-
6/
 
$0.1
6/
6/
-
 
.3
2.0
2,781
 
1941
.8
.8
-
$0.1
 
.1
$0.1
6/
-
 
.7
2.8
1,782
 
1942
1.1
1.0
-
.1
 
.2
.1
6/
-
 
.9
3.7
1,737
 
1943
1.3
1.2
-
.1
 
.2
.2
6/
-
 
1.1
4.8
1,891
 
1944
1.4
1.3
-
.1
 
.2
.2
6/
-
 
1.2
6.0
2,025
                             
 
1945
1.4
1.3
-
.1
 
.3
.3
6/
-
 
1.1
7.1
1,975
 
1946
1.4
1.3
-
.2
 
.4
.4
6/
-
 
1.0
8.2
1,704
 
1947
1.7
1.6
-
.2
 
.5
.5
6/
-
 
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/
 
1.9
20.6
500
                             
 
1955
6.2
5.7
-
.5
 
5.1
5.0
.1
6/
 
1.1
21.7
405
 
1956
6.7
6.2
-
.5
 
5.8
5.7
.1
6/
 
.9
22.5
371
 
1957
7.4
6.8
-
.6
 
7.5
7.3
.2
6/
 
-.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
                             
 
1980
$105.8
$103.5
-
$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
 
7 8.7
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
                             
 
2005
604.3
506.9
13.8
84.0
 
441.9
435.4
3.0
3.6
 
162.4
1,663.0
340
 
2006
642.2
534.8
15.6
91.8
 
461.0
454.5
3.0
3.5
 
181.3
1,844.3
361

1Includes 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/table4a1.html.

2Beginning 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.

3Net 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.

4Beginning 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.

5The "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.

6Less than $50 million.

7Reflects 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.

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

Table VI.A3.-Historical Operations of the DI Trust Fund,
Calendar Years 1957-2006 

[Amounts in billions]

Calendar
year
Income 
 
Expenditures
 
Assets
Total  1
Net
contri-
butions2
Taxa-
tion of
benefits
Net
inter-
est 3
Total
Benefit pay-
ments 4
Admin-
istra-
tive
costs
RRB
inter-
change
Net
increase during
year
Amount
at end
of year
Trust
Fund
ratio 5
 
1957
$0.7
$0.7
-
6/
 
$0.1
$0.1
6/
-
 
$0.6
$0.6
100
 
1958
1.0
1.0
-
6/
 
.3
.2
6/
-
 
.7
1.4
249
 
1959
.9
.9
-
6/
 
.5
.5
$0.1
6/
 
.4
1.8
284
                             
 
1960
1.1
1.0
-
$0.1
 
.6
.6
6/
6/
 
.5
2.3
304
 
1961
1.1
1.0
-
.1
 
1.0
.9
.1
6/
 
.1
2.4
239
 
1962
1.1
1.0
-
.1
 
1.2
1.1
.1
6/
 
-.1
2.4
206
 
1963
1.2
1.1
-
.1
 
1.3
1.2
.1
6/
 
-.1
2.2
183
 
1964
1.2
1.2
-
.1
 
1.4
1.3
.1
6/
 
-.2
2.0
159
                             
 
1965
1.2
1.2
-
.1
 
1.7
1.6
.1
6/
 
-.4
1.6
121
 
1966
2.1
2.0
-
.1
 
1.9
1.8
.1
6/
 
.1
1.7
82
 
1967
2.4
2.3
-
.1
 
2.1
2.0
.1
6/
 
.3
2.0
83
 
1968
3.5
3.3
-
.1
 
2.5
2.3
.1
6/
 
1.0
3.0
83
 
1969
3.8
3.6
-
.2
 
2.7
2.6
.1
6/
 
1.1
4.1
111
                             
 
1970
4.8
4.5
-
.3
 
3.3
3.1
.2
6/
 
1.5
5.6
126
 
1971
5.0
4.6
-
.4
 
4.0
3.8
.2
6/
 
1.0
6.6
140
 
1972
5.6
5.1
-
.4
 
4.8
4.5
.2
6/
 
.8
7.5
140
 
1973
6.4
5.9
-
.5
 
6.0
5.8
.2
6/
 
.5
7.9
125
 
1974
7.4
6.8
-
.5
 
7.2
7.0
.2
6/
 
.2
8.1
110
                             
 
1975
8.0
7.4
-
.5
 
8.8
8.5
.3
6/
 
-.8
7.4
92
 
1976
8.8
8.2
-
.4
 
10.4
10.1
.3
6/
 
-1.6
5.7
71
 
1977
9.6
9.1
-
.3
 
11.9
11.5
.4
6/
 
-2.4
3.4
48
 
1978
13.8
13.4
-
.3
 
13.0
12.6
.3
6/
 
.9
4.2
26
 
1979
15.6
15.1
-
.4
 
14.2
13.8
.4
6/
 
1.4
5.6
30
                             
 
1980
13.9
13.3
-
.5
 
15.9
15.5
.4
6/
 
-2.0
3.6
35
 
1981
17.1
16.7
-
.2
 
17.7
17.2
.4
6/
 
-.6
3.0
21
 
1982
22.7
22.0
-
.5
 
18.0
17.4
.6
6/
 
-.4
2.7
17
 
1983
20.7
18.0
-
1.6
 
18.2
17.5
.6
6/
 
2.5
5.2
15
 
1984
17.3
15.9
$0.2
1.2
 
18.5
17.9
.6
6/
 
-1.2
4.0
35
                             
 
1985
19.3
17.2
.2
.9
 
19.5
18.8
.6
6/
 
7 2.4
6.3
27
 
1986
19.4
18.4
.2
.8
 
20.5
19.9
.6
$0.1
 
7 1.5
7.8
38
 
1987
20.3
19.7
6/
.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/
 
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/
 
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
                             
 
2005
97.4
86.1
1.1
10.3
 
88.0
85.4
2.3
.3
 
9.4
195.6
212
 
2006
102.6
90.8
1.2
10.6
 
94.5
91.7
2.3
.4
 
8.2
203.8
207

1Includes 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/table4a2.html.

2Beginning 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.

3Net 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.

4Beginning 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.

5The "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.

6Less than $50 million.

7Reflects 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.

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

Table VI.A4.-Historical Operations of the Combined OASI and DI Trust Funds,
Calendar Years 1957-2006 

[Amounts in billions]

Calendar
year
Income 
 
Expenditures
 
Assets
Total 1
Net
contri-
butions2
Taxa-
tion of
benefits
Net
inter-
est 3
Total
Benefit pay-
ments 4
Admin-
istra-
tive costs
RRB
inter-
change
Net
increase during
year
Amount
at end
of year
Trust
Fund
ratio 5
 
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/
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
 
7 11.1
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
                             
 
2005
701.8
592.9
14.9
94.3
 
529.9
520.7
5.3
3.9
 
171.8
1,858.7
318
 
2006
744.9
625.6
16.9
102.4
 
555.4
546.2
5.3
3.8
 
189.5
2,048.1
335

1Includes 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/table4a3.html.

2Beginning 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.

3Net 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.

4Beginning 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.

5The "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.

6Less than $50 million.

7Reflects 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.

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 2005 and 2006. 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 2006 had an interest rate of 5.125 percent, compared with an interest rate of 4.125 percent for bonds issued in 2005.

Table VI.A5.-Assets of the OASI Trust Fund, End of Calendar Years 2005 and 2006

[In thousands]

 
December 31, 2005
December 31, 2006
Obligations sold only to the trust funds (special issues):
   
 
Certificates of indebtedness:
   
   
4.500 percent, 2007
-
$69,954,173
   
4.625 percent, 2006
$94,140,199
-
   
4.750 percent, 2007
-
11,593,669
   
5.250 percent, 2007
-
41,491,126
 
Bonds:
   
   
3.500 percent, 2007
9,513,751
-
   
3.500 percent, 2008-15
76,110,008
76,110,008
   
3.500 percent, 2016-17
19,027,504
19,027,504
   
3.500 percent, 2018
86,900,994
86,900,994
   
4.125 percent, 2007
10,516,947
-
   
4.125 percent, 2008-19
126,203,352
126,203,352
   
4.125 percent, 2020
106,585,700
106,585,700
   
4.625 percent, 2007
9,167,662
-
   
4.625 percent, 2008-15
73,341,312
73,341,312
   
4.625 percent, 2016-18
27,502,989
27,502,989
   
4.625 percent, 2019
96,068,657
96,068,657
   
5.125 percent, 2008-09
-
23,135,730
   
5.125 percent, 2010-19
-
115,678,660
   
5.125 percent, 2020
-
11,567,769
   
5.125 percent, 2021
-
118,153,469
   
5.250 percent, 2006
9,235,911
-
   
5.250 percent, 2007
9,235,912
-
   
5.250 percent, 2008-15
73,887,296
73,887,296
   
5.250 percent, 2016
9,235,911
9,235,911
   
5.250 percent, 2017
77,387,242
77,387,242
   
5.625 percent, 2006
9,621,438
-
   
5.625 percent, 2007-11
48,107,190
48,107,190
   
5.625 percent, 2012-15
38,485,748
38,485,748
   
5.625 percent, 2016
68,151,331
68,151,331
   
5.875 percent, 2006
6,169,273
-
   
5.875 percent, 2007-12
37,015,638
37,015,638
   
5.875 percent, 2013
43,258,869
43,258,869
   
6.000 percent, 2006
6,693,627
-
   
6.000 percent, 2007-11
33,468,135
33,468,135
   
6.000 percent, 2012-13
13,387,256
13,387,256
   
6.000 percent, 2014
49,952,497
49,952,497
   
6.250 percent, 2006
3,150,975
-
   
6.250 percent, 2007
3,150,974
3,150,974
   
6.250 percent, 2008
23,350,034
23,350,034
   
6.500 percent, 2006
11,008,650
-
   
6.500 percent, 2007-09
33,025,950
33,025,950
   
6.500 percent, 2010
38,320,240
38,320,240
   
6.500 percent, 2011-14
34,309,584
34,309,584
   
6.500 percent, 2015
58,529,893
58,529,893
   
6.875 percent, 2006
3,975,271
-
   
6.875 percent, 2007-09
11,925,813
11,925,813
   
6.875 percent, 2010-11
7,950,544
7,950,544
   
6.875 percent, 2012
37,089,596
37,089,596
   
7.000 percent, 2006
3,371,480
-
   
7.000 percent, 2007-10
13,485,920
13,485,920
   
7.000 percent, 2011
33,114,324
33,114,324
   
7.250 percent, 2006
3,961,556
-
   
7.250 percent, 2007-08
7,923,114
7,923,114
   
7.250 percent, 2009
27,311,591
27,311,591
   
7.375 percent, 2006
3,575,474
-
   
7.375 percent, 2007
20,199,060
20,199,060
   
8.125 percent, 2006
16,623,586
-
Total investments
1,663,725,978
1,845,338,862
Undisbursed balances 1
-688,652
-1,035,134
   
Total assets
1,663,037,326
1,844,303,728

1Negative figures represent an extension of credit against securities to be redeemed within the following few days.

Note: Amounts of special issues are shown at par value. Special issues are always purchased and redeemed at par value. Where equal amounts mature in two or more years at a given interest rate, they are grouped.

Table VI.A6.-Assets of the DI Trust Fund, End of Calendar Years 2005 and 2006 

[In thousands]

     
December 31, 2005
December 31, 2006
Obligations sold only to the trust funds (special issues):
   
 
Certificates of indebtedness:
   
   
4.500 percent, 2007
-
$8,252,811
   
4.625 percent, 2006
$8,339,100
-
 
Bonds:
   
   
3.500 percent, 2007
1,115,128
-
   
3.500 percent, 2008-11
4,460,512
4,460,512
   
3.500 percent, 2012-15
4,460,508
4,460,508
   
3.500 percent, 2016-17
2,230,256
2,230,256
   
3.500 percent, 2018
11,378,384
11,378,384
   
4.125 percent, 2007
677,386
--
   
4.125 percent, 2008-11
2,709,544
2,709,544
   
4.125 percent, 2012-17
4,064,310
4,064,310
   
4.125 percent, 2018-19
1,354,772
1,354,772
   
4.125 percent, 2020
12,911,283
12,911,283
   
4.625 percent, 2007
855,496
-
   
4.625 percent, 2008
855,496
855,496
   
4.625 percent, 2009-11
2,566,491
2,566,491
   
4.625 percent, 2012-15
3,421,992
3,421,992
   
4.625 percent, 2016-18
2,566,491
2,566,491
   
4.625 percent, 2019
12,233,881
12,233,881
   
5.125 percent, 2008
-
665,132
   
5.125 percent, 2009-17
-
5,986,179
   
5.125 percent, 2018-19
-
1,330,260
   
5.125 percent, 2020
-
665,115
   
5.125 percent, 2021
-
13,576,398
   
5.250 percent, 2007
1,363,407
-
   
5.250 percent, 2008-11
5,453,628
5,453,628
   
5.250 percent, 2012-16
6,817,040
6,817,040
   
5.250 percent, 2017
10,263,256
10,263,256
   
5.625 percent, 2007
1,524,968
-
   
5.625 percent, 2008-13
9,149,808
9,149,808
   
5.625 percent, 2014-15
3,049,934
3,049,934
   
5.625 percent, 2016
8,899,848
8,899,848
   
5.875 percent, 2006
159,252
-
   
5.875 percent, 2007
916,286
-
   
5.875 percent, 2008-12
4,581,430
4,581,430
   
5.875 percent, 2013
5,361,805
5,361,805
   
6.000 percent, 2006
695,965
-
   
6.000 percent, 2007
695,966
-
   
6.000 percent, 2008-12
3,479,830
3,479,830
   
6.000 percent, 2013
695,967
695,967
   
6.000 percent, 2014
6,057,772
6,057,772
   
6.500 percent, 2006
3,464,768
-
   
6.500 percent, 2007
3,464,767
3,301,315
   
6.500 percent, 2008
4,381,228
4,381,228
   
6.500 percent, 2009-13
6,585,540
6,585,540
   
6.500 percent, 2014
1,317,109
1,317,109
   
6.500 percent, 2015
7,374,881
7,374,881
   
6.875 percent, 2006
265,250
-
   
6.875 percent, 2007
265,250
265,250
   
6.875 percent, 2008-09
530,498
530,498
   
6.875 percent, 2010-12
13,336,560
13,336,560
   
7.000 percent, 2006
1,116,151
-
   
7.000 percent, 2007-08
2,232,302
2,232,302
   
7.000 percent, 2009
4,180,271
4,180,271
   
7.375 percent, 2006
47,601
-
   
7.375 percent, 2007
916,460
916,460
   
8.125 percent, 2006
868,859
-
Total investments
195,714,687
203,921,547
Undisbursed balances1
-91,890
-113,509
   
Total assets
195,622,797
203,808,038

1Negative figures represent an extension of credit against securities to be redeemed within the following few days.

Note: Amounts of special issues are shown at par value. Special issues are always purchased and redeemed at par value. Where equal amounts mature in two or more years at a given interest rate, they are grouped.


1 The contribution rates for the Hospital Insurance (HI) program, and for the OASDI and HI programs combined, are shown in table VI.F1.

2The additional tax revenues resulting from the increase to 85 percent are transferred to the HI Trust Fund.

3 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.


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