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DI Trust Fund, a Social Security fund

Data on DI income and cost follow the summary table below

Disability Insurance Trust Fund, 1957-2023
[In millions]
Asset Reserves a
Calendar
year		 Total
income		 Total
cost a		 Net increase
during year		 Asset Reserves at
end of year
1957 $709 $59 $649 $649
1958 991 261 729 1,379
1959 931 485 447 1,825
1960 1,063 600 464 2,289
1961 1,104 956 148 2,437
1962 1,114 1,183 -69 2,368
1963 1,165 1,297 -133 2,235
1964 1,218 1,407 -188 2,047
1965 1,247 1,687 -440 1,606
1966 2,079 1,947 133 1,739
1967 2,379 2,089 290 2,029
1968 3,454 2,458 996 3,025
1969 3,792 2,716 1,075 4,100
1970 4,774 3,259 1,514 5,614
1971 5,031 4,000 1,031 6,645
1972 5,572 4,759 813 7,457
1973 6,443 5,973 470 7,927
1974 7,378 7,196 182 8,109
1975 8,035 8,790 -754 7,354
1976 8,757 10,366 -1,609 5,745
1977 9,570 11,945 -2,375 3,370
1978 13,810 12,954 856 4,226
1979 15,590 14,186 1,404 5,630
1980 13,871 15,872 -2,001 3,629
1981 17,078 17,658 -580 3,049
1982 22,715 17,992 -358 2,691
1983 20,682 18,177 2,505 5,195
1984 17,309 18,546 -1,237 3,959
1985 19,301 19,478 2,363 6,321
1986 19,439 20,522 1,459 7,780
1987 20,303 21,425 -1,122 6,658
1988 22,699 22,494 206 6,864
1989 24,795 23,753 1,041 7,905
1990 28,791 25,616 3,174 11,079
1991 30,390 28,571 1,819 12,898
1992 31,430 32,004 -574 12,324
1993 32,301 35,662 -3,361 8,963
1994 52,841 38,879 13,962 22,925
1995 56,696 42,055 14,641 37,566
1996 60,710 45,351 15,359 52,924
1997 60,499 47,034 13,465 66,389
1998 64,357 49,931 14,425 80,815
1999 69,541 53,035 16,507 97,321
2000 77,920 56,782 21,138 118,459
2001 83,903 61,369 22,534 140,993
2002 87,379 67,905 19,475 160,468
2003 88,074 73,108 14,966 175,434
2004 91,380 80,597 10,783 186,217
2005 97,423 88,018 9,405 195,623
2006 102,641 94,456 8,185 203,808
2007 109,854 98,778 11,076 214,884
2008 109,840 108,951 889 215,773
2009 109,283 121,506 -12,223 203,550
2010 104,017 127,660 -23,643 179,907
2011 106,276 132,332 -26,056 153,850
2012 109,115 140,299 -31,184 122,666
2013 111,228 143,450 -32,221 90,445
2014 114,858 145,060 -30,201 60,244
2015 118,595 146,581 -27,985 32,259
2016 159,996 145,917 14,079 46,338
2017 170,951 145,809 25,142 71,480
2018 172,347 146,770 25,577 97,057
2019 143,901 147,876 -3,974 93,083
2020 149,748 146,260 3,488 96,570
2021 145,470 142,646 2,824 99,394
2022 165,063 146,470 18,594 117,988
2023 183,801 154,815 28,985 146,973
a Beginning in 1979, benefit payments scheduled to be paid on January 3 of a given year were paid on December 31 of the preceding year as required by the statutory provision included in the 1977 Social Security Amendments for early delivery of benefit payments when the normal payment delivery date is a Saturday, Sunday, or legal public holiday. Such advance payments have occurred about every 7 years, first for benefits scheduled for January 3, 1982. For comparability with other historical years, all trust fund operations and asset reserves reflect the 12 months of benefits scheduled for payment in each year.
Note: The annual net increase in the fund is the change in the asset reserves from the end of one year to the end of the next. In 1982, the Old-Age and Survivors Insurance Trust Fund borrowed money from the fund, and repaid the borrowed amounts in 1985 and 1986. For each of these years, the net increase in the fund is equal to total income less total cost, less amounts borrowed or plus amounts repaid. Asset reserves, except for relatively small cash amounts, are invested in Federal Government securities.



Disability Insurance Trust Fund Income
[In millions]
Calendar
year		 Total
income		 Net
payroll tax
contributions		 Income from
taxation
of benefits		 General Fund Transfers a Net interest b
1957 $709 $702 … … $7
1958 991 966 … … 25
1959 931 891 … … 40
1960 1,063 1,010 … … 53
1961 1,104 1,038 … … 66
1962 1,114 1,046 … … 68
1963 1,165 1,099 … … 66
1964 1,218 1,154 … … 64
1965 1,247 1,188 … … 59
1966 2,079 2,006 … $16 58
1967 2,379 2,286 … 16 78
1968 3,454 3,316 … 32 106
1969 3,792 3,599 … 16 177
1970 4,774 4,481 … 16 277
1971 5,031 4,620 … 50 361
1972 5,572 5,107 … 51 414
1973 6,443 5,932 … 52 458
1974 7,378 6,826 … 52 500
1975 8,035 7,444 … 90 502
1976 8,757 8,233 … 103 422
1977 9,570 9,138 … 128 304
1978 13,810 13,413 … 142 256
1979 15,590 15,114 … 118 358
1980 13,871 13,255 … 130 485
1981 17,078 16,738 … 168 172
1982 22,715 21,995 … 174 546
1983 20,682 17,991 … 1,121 1,569
1984 17,309 15,503 $190 441 1,174
1985 19,301 17,014 222 1,195 870
1986 19,439 18,247 238 152 803
1987 20,303 19,538 -36 153 648
1988 22,699 21,837 61 202 600
1989 24,795 23,797 95 196 707
1990 28,791 28,403 144 -639 883
1991 30,390 29,128 190 9 1,063
1992 31,430 30,148 232 -12 1,062
1993 32,301 31,182 281 4 835
1994 52,841 51,372 311 1 1,157
1995 56,696 54,404 341 -207 2,158
1996 60,710 57,325 373 (c) 3,012
1997 60,499 56,037 470 (c) 3,992
1998 64,357 58,966 558 (c) 4,832
1999 69,541 63,203 661 (c) 5,677
2000 77,920 71,093 721 -836 6,942
2001 83,903 74,933 811 (c) 8,158
2002 87,379 77,272 930 (c) 9,178
2003 88,074 77,442 944 (c) 9,689
2004 91,380 80,281 1,111 (c) 9,988
2005 97,423 86,077 1,073 (c) 10,273
2006 102,641 90,808 1,230 (c) 10,603
2007 109,854 95,243 1,393 8 13,210
2008 109,840 97,566 1,313 (c) 10,961
2009 109,283 96,865 1,955 (c) 10,463
2010 104,017 92,511 1,852 363 9,292
2011 106,276 81,881 1,581 14,927 7,887
2012 109,115 85,615 583 16,546 6,371
2013 111,228 105,402 391 729 4,706
2014 114,858 109,737 1,680 71 3,371
2015 118,595 115,389 1,071 47 2,088
2016 159,996 157,391 1,194 15 1,396
2017 170,951 167,087 1,973 3 1,888
2018 172,347 169,186 530 3 2,628
2019 143,901 139,377 1,583 2 2,940
2020 149,748 145,293 1,704 (c) 2,750
2021 145,470 142,367 459 (c) 2,644
2022 165,063 160,678 1,553 (c) 2,833
2023 183,801 179,023 950 (c) 3,828
aIncludes reimbursements from the General Fund of the Treasury to the DI Trust Fund for: (1) the cost of noncontributory wage credits for military service before 1957; (2) the cost in 1971-82 of deemed wage credits for military service performed after 1956; (3) the cost of benefits to certain uninsured persons who attained age 72 before 1968; (4) the cost of payroll tax credits provided to employees in 1984 and self-employed persons in 1984-89 by Public Law 98-21; (5) the cost in 2009-13 of excluding certain self-employment earnings from SECA taxes under Public Law 110-246; and (6) payroll tax revenue forgone under the provisions of Public Laws 111-147, 111-312, 112-78, and 112-96.
b Includes relatively small amounts of gifts to the fund.
c Less than $500,000.



Disability Insurance Trust Fund Cost
[In millions]
Calendar
year		 Total
cost a		 Benefit
payments a b		 Administrative
expenses		 Transfers to Railroad Retirement program
1957 $59 $57 $3 …
1958 261 249 12 …
1959 485 457 50 -$22
1960 600 568 36 -5
1961 956 887 64 5
1962 1,183 1,105 66 11
1963 1,297 1,210 68 20
1964 1,407 1,309 79 19
1965 1,687 1,573 90 24
1966 1,947 1,784 137 25
1967 2,089 1,950 109 31
1968 2,458 2,311 127 20
1969 2,716 2,557 138 21
1970 3,259 3,085 164 10
1971 4,000 3,783 205 13
1972 4,759 4,502 233 24
1973 5,973 5,764 190 20
1974 7,196 6,957 217 22
1975 8,790 8,505 256 29
1976 10,366 10,055 285 26
1977 11,945 11,547 399 -1
1978 12,954 12,599 325 30
1979 14,186 13,786 371 30
1980 15,872 15,515 368 -12
1981 17,658 17,192 436 29
1982 17,992 17,376 590 26
1983 18,177 17,524 625 28
1984 18,546 17,898 626 22
1985 19,478 18,827 608 43
1986 20,522 19,853 600 68
1987 21,425 20,519 849 57
1988 22,494 21,695 737 61
1989 23,753 22,911 754 88
1990 25,616 24,829 707 80
1991 28,571 27,695 794 82
1992 32,004 31,112 834 58
1993 35,662 34,613 966 83
1994 38,879 37,744 1,029 106
1995 42,055 40,923 1,064 68
1996 45,351 44,189 1,160 2
1997 47,034 45,695 1,280 59
1998 49,931 48,207 1,567 157
1999 53,035 51,381 1,519 135
2000 56,782 54,983 1,639 159
2001 61,369 59,618 1,741 10
2002 67,905 65,702 2,049 154
2003 73,108 70,933 2,008 167
2004 80,597 78,229 2,152 215
2005 88,018 85,365 2,315 338
2006 94,456 91,741 2,326 388
2007 98,778 95,865 2,468 445
2008 108,951 106,007 2,526 418
2009 121,506 118,315 2,743 448
2010 127,660 124,216 2,982 462
2011 132,332 128,948 2,920 465
2012 140,299 136,897 2,890 512
2013 143,450 140,130 2,769 551
2014 145,060 141,683 2,933 444
2015 146,581 143,370 2,792 419
2016 145,917 142,781 2,760 376
2017 145,809 142,806 2,796 207
2018 146,770 143,741 2,856 174
2019 147,876 145,121 2,689 66
2020 146,260 143,561 2,555 144
2021 142,646 140,058 2,481 107
2022 146,470 143,567 2,747 156
2023 154,815 151,917 2,839 60
a Beginning in 1979, benefit payments scheduled to be paid on January 3 of a given year were paid on December 31 of the preceding year as required by the statutory provision included in the 1977 Social Security Amendments for early delivery of benefit payments when the normal payment delivery date is a Saturday, Sunday, or legal public holiday. Such advance payments have occurred about every 7 years, first for benefits scheduled for January 3, 1982. For comparability with other historical years, all trust fund operations and asset reserves reflect the 12 months of benefits scheduled for payment in each year.
b Beginning in 1966, includes payments for vocational rehabilitation services furnished to disabled persons receiving benefits because of their disabilities. Beginning in 1983, amounts are reduced by amount of reimbursement for unnegotiated benefit checks.