Amendments to the Internal Revenue Laws of the United States

This article lists the statutes amending the internal revenue laws of the United States.

1800-1899

1900s

1910s

1920s

  • Revenue Act of 1921
  • Revenue Act of 1924
  • Revenue Act of 1926
  • Revenue Act of 1928

1930s

1940s

1950s

  • Revenue Act of 1950
  • Excess profits tax (1950)
  • P.L. 82-183 Enacted 10/20/51 Revenue Act of 1951
  • P.L. 83-324 Enacted 03/31/54 Excise Tax Reduction Act of 1954
  • P.L. 83-517 Enacted 07/22/1954 Revised Organic Act of the Virgin Islands
  • P.L. 83-591 Enacted 08/16/54 Internal Revenue Code of 1954
  • P.L. 83-703 Enacted 08/30/1954 Atomic Energy Act of 1954
  • P.L. 83-729 Enacted 08/31/1954
  • P.L. 83-746 Enacted 08/31/1954
  • P.L. 83-761 Enacted 09/01/1954 Social Security Amendments of 1954
  • P.L. 83-767 Enacted 09/01/1954
  • P.L. 84-1 Enacted 01/20/1955
  • P.L. 84-9 Enacted 03/02/1955
  • P.L. 84-18 Enacted 03/30/1955 Tax Rate Extension Act of 1955
  • P.L. 84-74 Enacted 06/15/1955
  • P.L. 84-299 Enacted 08/09/1955
  • P.L. 84-306 Enacted 08/09/1955
  • P.L. 84-317 Enacted 08/09/1955
  • P.L. 84-321 Enacted 08/09/1955
  • P.L. 84-333 Enacted 08/09/1955
  • P.L. 84-354 Enacted 08/11/1955
  • P.L. 84-355 Enacted 08/11/1955
  • P.L. 84-366 Enacted 08/11/1955
  • P.L. 84-367 Enacted 08/11/1955
  • P.L. 84-379 Enacted 08/12/1955
  • P.L. 84-384 Enacted 08/12/1955
  • P.L. 84-385 Enacted 08/12/1955
  • P.L. 84-396 Enacted 01/28/1956
  • P.L. 84-398 Enacted 01/28/1956
  • P.L. 84-400 Enacted 01/28/1956
  • P.L. 84-414 Enacted 02/20/1956
  • P.L. 84-429 Enacted 03/13/1956 Life Insurance Company Tax Act for 1955
  • P.L. 84-458 Enacted 03/29/1956 Tax Rate Extension Act of 1956
  • P.L. 84-466 Enacted 04/02/1956
  • P.L. 84-495 Enacted 04/27/1956
  • P.L. 84-511 Enacted 05/09/1956 Bank Holding Company Act of 1956
  • P.L. 84-545 Enacted 05/29/1956
  • P.L. 84-627 Enacted 06/29/1956 Federal-Aid Highway Act of 1956
  • P.L. 84-628 Enacted 06/29/1956
  • P.L. 84-629 Enacted 06/29/1956
  • P.L. 84-700 Enacted 07/11/1956
  • P.L. 84-726 Enacted 07/18/1956 Mutual Security Act of 1956
  • P.L. 84-728 Enacted 07/18/1956 Narcotic Control Act of 1956
  • P.L. 84-784 Enacted 07/24/1956
  • P.L. 84-796 Enacted 07/25/1956
  • P.L. 84-880 Enacted 08/01/1956 Social Security Amendments of 1956
  • P.L. 84-881 Enacted 08/01/1956 Servicemen's and Veterans' Survivor Benefits Act
  • P.L. 84-896 Enacted 08/01/1956
  • P.L. 84-1010 Enacted 08/06/1956
  • P.L. 84-1011 Enacted 08/06/1956
  • P.L. 84-1015 Enacted 08/07/1956
  • P.L. 84-1022 Enacted 08/07/1956
  • P.L. 85-12 Enacted 03/29/1957 Tax Rate Extension Act of 1957
  • P.L. 85-56 Enacted 06/17/1957 Veterans' Benefits Act of 1957
  • P.L. 85-74 Enacted 08/29/1957
  • P.L. 85-165 Enacted 08/26/1957
  • P.L. 85-235 Enacted 08/30/1957
  • P.L. 85-239 Enacted 02/30/1958
  • P.L. 85-320 Enacted 02/11/1958
  • P.L. 85-321 Enacted 02/11/1958
  • P.L. 85-323 Enacted 03/11/1958
  • P.L. 85-345 Enacted 03/17/1958
  • P.L. 85-367 Enacted 04/07/1958
  • P.L. 85-380 Enacted 04/16/1958
  • P.L. 85-475 Enacted 06/30/1958 Tax Rate Extension Act of 1958
  • P.L. 85-517 Enacted 08/28/1958 Social Security Amendments of 1958
  • P.L. 85-840 Enacted 09/02/1958 Excise Tax Technical Changes Act of 1958
  • P.L. 85-859 Enacted 09/02/1958 Technical Amendments Act of 1958
  • P.L. 85-866 Enacted 09/02/1958 Small Business Tax Revision Act of 1958
  • P.L. 85-881 Enacted 09/02/1958
  • P.L. 86-28 Enacted 05/19/1959
  • P.L. 86-69 Enacted 06/25/1959 Life Insurance Company Income Tax Act of 1959
  • P.L. 86-70 Enacted 06/25/1959 Alaska Omnibus Bill
  • P.L. 86-75 Enacted 06/30/1959 Tax Rate Extension Act of 1959
  • P.L. 86-141 Enacted 08/07/1959
  • P.L. 86-168 Enacted 08/18/1959 Farm Credit Act of 1959
  • P.L. 86-175 Enacted 08/21/1959
  • P.L. 86-280 Enacted 09/16/1959
  • P.L. 86-319 Enacted 09/21/1959
  • P.L. 86-342 Enacted 09/21/1959 Federal-Aid Highway Act of 1959
  • P.L. 86-344 Enacted 09/21/1959
  • P.L. 86-346 Enacted 09/22/1959
  • P.L. 86-368 Enacted 09/22/1959
  • P.L. 86-376 Enacted 09/23/1959

1960s

  • P.L. 86-413 Enacted 04/08/1960
  • P.L. 86-416 Enacted 04/08/1960
  • P.L. 86-418 Enacted 04/08/1960
  • P.L. 86-422 Enacted 04/08/1960
  • P.L. 86-428 Enacted 04/22/1960
  • P.L. 86-429 Enacted 04/22/1960 Narcotics Manufacturing Act of 1960
  • P.L. 86-435 Enacted 04/22/1960
  • P.L. 86-437 Enacted 04/22/1960
  • P.L. 86-440 Enacted 04/22/1960
  • P.L. 86-459 Enacted 05/13/1960 Dealer Reserve Income Adjustment Act of 1960
  • P.L. 86-470 Enacted 05/14/1960
  • P.L. 86-478 Enacted 06/01/1960
  • P.L. 86-496 Enacted 06/08/1960
  • P.L. 86-564 Enacted 06/30/1960 Public Debt and Tax Rate Extension Act of 1960
  • P.L. 86-592 Enacted 07/06/1960
  • P.L. 86-594 Enacted 07/06/1960
  • P.L. 86-624 Enacted 07/12/1960 Hawaii Omnibus Act
  • P.L. 86-667 Enacted 07/14/1960
  • P.L. 86-707 Enacted 09/06/1960 Overseas Differentials and Allowances Act
  • P.L. 86-723 Enacted 09/08/1960 Foreign Service Act Amendments of 1960
  • P.L. 86-778 Enacted 09/13/1960 Social Security Amendments of 1960
  • P.L. 86-779 Enacted 09/14/1960
  • P.L. 86-780 Enacted 09/14/1960
  • P.L. 86-781 Enacted 09/14/1960
  • P.L. 87-6 Enacted 03/24/1961 Temporary Extended Unemployment Compensation Act of 1961
  • P.L. 87-15 Enacted 03/31/1961
  • P.L. 87-29 Enacted 05/04/1961
  • P.L. 87-59 Enacted 06/27/1961
  • P.L. 87-61 Enacted 06/29/1961 Federal-Aid Highway Act of 1961
  • P.L. 87-64 Enacted 06/30/1961 Social Security Amendments of 1961
  • P.L. 87-72 Enacted 06/30/1961 Tax Rate Extension Act of 1961
  • P.L. 87-109 Enacted 07/26/1961
  • P.L. 87-256 Enacted 09/21/1961 Mutual Educational and Cultural Exchange Act of 1961
  • P.L. 87-293 Enacted 09/22/1961 Peace Corps Act
  • P.L. 87-321 Enacted 09/26/1961
  • P.L. 87-370 Enacted 10/04/1961
  • P.L. 87-397 Enacted 10/05/1961
  • P.L. 87-403 Enacted 02/02/1962
  • P.L. 87-426 Enacted 03/31/1962
  • P.L. 87-456 Enacted 05/24/1962 Tariff Classification Act of 1962
  • P.L. 87-508 Enacted 06/28/1962 Tax Rate Extension Act of 1962
  • P.L. 87-535 Enacted 07/13/1962 Sugar Act Amendments of 1962
  • P.L. 87-682 Enacted 09/25/1962
  • P.L. 87-710 Enacted 09/27/1962
  • P.L. 87-722 Enacted 09/28/1962
  • P.L. 87-768 Enacted 10/09/1962
  • P.L. 87-770 Enacted 10/09/1962
  • P.L. 87-790 Enacted 10/10/1962
  • P.L. 87-792 Enacted 10/10/1962 Self-Employed Individuals Tax Retirement Act of 1962
  • P.L. 87-794 Enacted 10/11/1962 Trade Expansion Act of 1962
  • P.L. 87-834 Enacted 10/16/1962 Revenue Act of 1962
  • P.L. 87-858 Enacted 10/23/1962
  • P.L. 87-863 Enacted 10/23/1962
  • P.L. 87-870 Enacted 10/23/1962
  • P.L. 87-876 Enacted 10/24/1962
  • P.L. 88-4 Enacted 04/02/1963
  • P.L. 88-9 Enacted 04/10/1963
  • P.L. 88-31 Enacted 05/29/1963
  • P.L. 88-36 Enacted 06/04/1963
  • P.L. 88-52 Enacted 06/29/1963 Tax Rate Extension Act of 1963
  • P.L. 88-133 Enacted 10/05/1963
  • P.L. 88-173 Enacted 11/07/1963
  • P.L. 88-272 Enacted 02/26/1964 Revenue Act of 1964
  • P.L. 88-342 Enacted 06/30/1964
  • P.L. 88-348 Enacted 06/30/1964 Excise Tax Rate Extension Act of 1964
  • P.L. 88-380 Enacted 07/17/1964
  • P.L. 88-426 Enacted 08/14/1964 Government Employees Salary Act of 1964
  • P.L. 88-484 Enacted 08/22/1964
  • P.L. 88-539 Enacted 08/31/1963
  • P.L. 88-554 Enacted 08/31/1964
  • P.L. 88-563 Enacted 09/02/1964 Interest Equalization Tax Act
  • P.L. 88-570 Enacted 09/02/1964
  • P.L. 88-571 Enacted 09/02/1964
  • P.L. 88-650 Enacted 10/13/1964
  • P.L. 88-653 Enacted 10/13/1964
  • P.L. 89-44 Enacted 06/21/1965 Excise Tax Reduction Act of 1965
  • P.L. 89-97 Enacted 07/30/1965 Social Security Amendments of 1965
  • P.L. 89-212 Enacted 09/29/1965
  • P.L. 89-243 Enacted 10/09/1965 Interest Equalization Tax Extension Act of 1965
  • P.L. 89-331 Enacted 11/08/1965 Sugar Act Amendments of 1965
  • P.L. 89-352 Enacted 02/02/1966
  • P.L. 89-354 Enacted 02/02/1966
  • P.L. 89-365 Enacted 03/08/1966
  • P.L. 89-368 Enacted 03/15/1966 Tax Adjustment Act of 1966
  • P.L. 89-384 Enacted 04/08/1966
  • P.L. 89-389 Enacted 04/14/1966
  • P.L. 89-493 Enacted 07/05/1966
  • P.L. 89-523 Enacted 08/01/1966
  • P.L. 89-570 Enacted 09/12/1966
  • P.L. 89-621 Enacted 10/04/1966
  • P.L. 89-699 Enacted 10/30/1966
  • P.L. 87-700 Enacted 10/30/1966
  • P.L. 89-713 Enacted 11/02/1966
  • P.L. 89-719 Enacted 11/02/1966 Federal Tax Lien Act of 1966
  • P.L. 89-721 Enacted 11/02/1966
  • P.L. 89-722 Enacted 11/02/1966
  • P.L. 89-739 Enacted 11/08/1966
  • P.L. 89-793 Enacted 11/08/1966
  • P.L. 89-800 Enacted 11/08/1966
  • P.L. 89-809 Enacted 11/13/1966 Foreign Investors Tax Act of 1966
  • P.L. 90-26 Enacted 06/13/1967
  • P.L. 90-59 Enacted 07/31/1967 Interest Equalization Tax Extension Act of 1967
  • P.L. 90-73 Enacted 08/29/1967
  • P.L. 90-78 Enacted 08/31/1967
  • P.L. 90-225 Enacted 12/27/1967
  • P.L. 90-240 Enacted 01/02/1968
  • P.L. 90-248 Enacted 01/02/1968 Social Security Amendments of 1967
  • P.L. 90-285 Enacted 04/12/1968
  • P.L. 90-346 Enacted 06/18/1968
  • P.L. 90-364 Enacted 06/28/1968 Revenue and Expenditure Control Act of 1968
  • P.L. 90-607 Enacted 10/21/1968
  • P.L. 90-615 Enacted 10/21/1968
  • P.L. 90-618 Enacted 10/22/1968 Gun Control Act of 1968
  • P.L. 90-619 Enacted 10/22/1968
  • P.L. 90-621 Enacted 10/22/1968
  • P.L. 90-622 Enacted 10/22/1968
  • P.L. 90-624 Enacted 10/22/1968
  • P.L. 90-634 Enacted 10/24/1968 Renegotiation Amendments Act of 1968
  • P.L. 91-36 Enacted 06/30/1968
  • P.L. 91-50 Enacted 08/02/1969
  • P.L. 91-53 Enacted 08/07/1969
  • P.L. 91-65 Enacted 08/25/1969
  • P.L. 91-128 Enacted 11/26/1969 Interest Equalization Tax Extension Act of 1969
  • P.L. 91-172 Enacted 12/30/1969 Tax Reform Act of 1969

1970s

  • P.L. 91-215 Enacted 03/17/1970
  • P.L. 91-258 Enacted 05/21/1970 Airport and Airway Revenue Act of 1970
  • P.L. 91-373 Enacted 08/10/1970 Employment Security Amendments of 1970
  • P.L. 91-420 Enacted 09/25/1970
  • P.L. 91-513 Enacted 10/27/1970
  • P.L. 91-518 Enacted 10/30/1970 Rail Passenger Service Act of 1970
  • P.L. 91-605 Enacted 12/31/1970 Federal-Aid Highway Act of 1970
  • P.L. 91-606 Enacted 12/31/1970 Disaster Relief Act of 1970
  • P.L. 91-614 Enacted 12/31/1970 Excise, Estate, and Gift Tax Adjustment Act of 1970
  • P.L. 91-618 Enacted 12/31/1970
  • P.L. 91-659 Enacted 01/08/1971
  • P.L. 91-673 Enacted 01/12/1971
  • P.L. 91-676 Enacted 01/12/1971
  • P.L. 91-677 Enacted 01/12/1971
  • P.L. 91-678 Enacted 01/12/1971
  • P.L. 91-679 Enacted 01/12/1971
  • P.L. 91-680 Enacted 01/12/1971
  • P.L. 91-681 Enacted 01/12/1971
  • P.L. 91-683 Enacted 01/12/1971
  • P.L. 91-684 Enacted 01/12/1971
  • P.L. 91-686 Enacted 01/12/1971
  • P.L. 91-687 Enacted 01/12/1971
  • P.L. 91-688 Enacted 01/12/1971
  • P.L. 91-691 Enacted 01/12/1971
  • P.L. 91-693 Enacted 01/12/1971
  • P.L. 92-5 Enacted 03/17/1971
  • P.L. 92-9 Enacted 04/01/1971 Interest Equalization Tax Extension Act of 1971
  • P.L. 92-41 Enacted 07/01/1971
  • P.L. 92-138 Enacted 10/14/1971 Sugar Act Amendments of 1971
  • P.L. 92-178 Enacted 12/10/1971 Revenue Act of 1971
  • P.L. 92-279 Enacted 04/26/1972
  • P.L. 92-310 Enacted 06/06/1972
  • P.L. 92-329 Enacted 06/30/1972
  • P.L. 92-336 Enacted 07/01/1972
  • P.L. 92-418 Enacted 08/29/1972
  • P.L. 92-512 Enacted 10/20/1972 State and Local Fiscal Assistance Act of 1972
  • P.L. 92-558 Enacted 10/25/1972
  • P.L. 92-580 Enacted 10/27/1972
  • P.L. 92-603 Enacted 10/30/1972 Social Security Amendments of 1972
  • P.L. 92-606 Enacted 10/31/1972
  • P.L. 93-17 Enacted 04/10/1973 Interest Equalization Tax Extension Act of 1973
  • P.L. 93-53 Enacted 07/01/1973
  • P.L. 93-66 Enacted 07/09/1973
  • P.L. 93-69 Enacted 07/10/1973
  • P.L. 93-233 Enacted 12/31/1973
  • P.L. 93-288 Enacted 05/22/1974 Disaster Relief Act of 1974
  • P.L. 93-310 Enacted 06/08/1974
  • P.L. 93-368 Enacted 08/07/1974
  • P.L. 93-406 Enacted 09/02/1974 Employee Retirement Income Security Act of 1974
  • P.L. 93-443 Enacted 10/15/1974 Federal Election Campaign Act Amendments of 1974
  • P.L. 93-445 Enacted 10/16/1974
  • P.L. 93-480 Enacted 10/26/1974
  • P.L. 93-482 Enacted 10/26/1974
  • P.L. 93-483 Enacted 10/26/1974
  • P.L. 93-490 Enacted 10/26/1974
  • P.L. 93-499 Enacted 10/29/1974
  • P.L. 93-597 Enacted 01/02/1975
  • P.L. 93-625 Enacted 01/03/1975
  • P.L. 94-12 Enacted 03/29/1975 Tax Reduction Act of 1975
  • P.L. 94-45 Enacted 06/30/1975 Emergency Compensation and Special Unemployment Assistance Extension Act of 1975
  • P.L. 94-81 Enacted 08/09/1975
  • P.L. 94-92 Enacted 08/09/1975
  • P.L. 94-93 Enacted 08/09/1975
  • P.L. 94-164 Enacted 12/23/1975 Revenue Adjustment Act of 1975
  • P.L. 94-202 Enacted 01/02/1976
  • P.L. 94-253 Enacted 03/31/1976
  • P.L. 94-267 Enacted 04/15/1976
  • P.L. 94-273 Enacted 04/21/1976 Fiscal Year Adjustment Act
  • P.L. 94-280 Enacted 05/05/1976
  • P.L. 94-283 Enacted 05/11/1976 Federal Election Campaign Act Amendments of 1976
  • P.L. 94-331 Enacted 06/30/1976
  • P.L. 94-396 Enacted 09/03/1976
  • P.L. 94-401 Enacted 09/07/1976
  • P.L. 94-414 Enacted 09/17/1976
  • P.L. 94-452 Enacted 10/02/1976 Bank Holding Company Tax Act of 1976
  • P.L. 94-455 Enacted 10/04/1976 Tax Reform Act of 1976
  • P.L. 94-514 Enacted 10/15/1976
  • P.L. 94-528 Enacted 10/17/1976
  • P.L. 94-529 Enacted 10/17/1976
  • P.L. 94-530 Enacted 10/17/1976
  • P.L. 94-547 Enacted 10/18/1976
  • P.L. 94-553 Enacted 10/19/1976 Copyrights Act
  • P.L. 94-563 Enacted 10/19/1976
  • P.L. 94-566 Enacted 10/20/1976 Unemployment Compensation Amendments of 1976
  • P.L. 94-568 Enacted 10/20/1976
  • P.L. 94-569 Enacted 10/20/1976
  • P.L. 95-19 Enacted 04/12/1977 Emergency Unemployment Compensation Act of 1977
  • P.L. 95-30 Enacted 05/23/77 Tax Reduction and Simplification Act of 1977
  • P.L. 95-147 Enacted 10/28/77
  • P.L. 95-171 Enacted 11/12/77
  • P.L. 95-172 Enacted 11/12/77
  • P.L. 95-176 Enacted 11/14/77
  • P.L. 95-210 Enacted 12/13/77
  • P.L. 95-216 Enacted 12/20/77
  • P.L. 95-227 Enacted 02/10/78 Black Lung Benefits Revenue Act of 1977
  • P.L. 95-339 Enacted 08/08/78 New York City Loan Guarantee Act of 1978
  • P.L. 95-345 Enacted 08/15/78
  • P.L. 95-423 Enacted 10/06/78
  • P.L. 95-427 Enacted 10/07/78
  • P.L. 95-458 Enacted 10/14/78
  • P.L. 95-472 Enacted 10/17/78
  • P.L. 95-473 Enacted 10/17/78
  • P.L. 95-479 Enacted 10/18/78 Veterans' Disability Compensation and Survivors' Benefits Act of 1978
  • P.L. 95-488 Enacted 10/20/78
  • P.L. 95-502 Enacted 10/21/78 Inland Waterways Revenue Act of 1978
  • P.L. 95-599 Enacted 11/06/78 Surface Transportation Assistance Act of 1978
  • P.L. 95-600 Enacted 10/06/78 Revenue Act of 1978
  • P.L. 95-615 Enacted 11/08/78 Tax Treatment Extension Act of 1978
  • P.L. 95-618 Enacted 11/09/78 Energy Tax Act of 1978
  • P.L. 95-628 Enacted 11/10/78
  • P.L. 96-39 Enacted 07/26/79 Trade Agreements Act of 1979
  • P.L. 96-72 Enacted 09/29/79 Export Administration Act of 1979
  • P.L. 96-84 Enacted 10/10/79
  • P.L. 96-167 Enacted 12/29/79

1980s

1990s

2000s

2010s

2020s

Citations

  • Internal Revenue Code: Income, Estate, Gift, Employment & Excise Taxes (Internal Revenue Code. Winter) CCH Tax Law Editors