FEDERAL · 26 U.S.C. · Chapter Subchapter A—Determination of Tax Liability
Effect of changes
26 U.S.C. § 15
This text of 26 U.S.C. § 15 (Effect of changes) is published on Counsel Stack Legal Research, covering United States primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.
Bluebook
26 U.S.C. § 15.
Text
(a)General rule
If any rate of tax imposed by this chapter changes, and if the taxable year includes the effective date of the change (unless that date is the first day of the taxable year), then—
(1)tentative taxes shall be computed by applying the rate for the period before the effective date of the change, and the rate for the period on and after such date, to the taxable income for the entire taxable year; and
(2)the tax for such taxable year shall be the sum of that proportion of each tentative tax which the number of days in each period bears to the number of days in the entire taxable year.
(b)Repeal of tax
For purposes of subsection (a)—
(1)if a tax is repealed, the repeal shall be considered a change of rate; and
(2)the rate for the period after the repeal shall be zero.
(c)
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Source Credit
History
(Aug. 16, 1954, ch. 736, 68A Stat. 12, §21; Pub. L. 88–272, title I, §132, Feb. 26, 1964, 78 Stat. 30; Pub. L. 91–172, title VIII, §803(e), Dec. 30, 1969, 83 Stat. 685; Pub. L. 92–178, title II, §205, Dec. 10, 1971, 85 Stat. 511; Pub. L. 94–12, title III, §305(b)(2), Mar. 29, 1975, 89 Stat. 45; Pub. L. 94–164, §4(d)(2), Dec. 23, 1975, 89 Stat. 975; Pub. L. 94–455, title IX, §901(c)(2), Oct. 4, 1976, 90 Stat. 1607; Pub. L. 95–30, title I, §101(d)(2), May 23, 1977, 91 Stat. 133; Pub. L. 95–600, title I, §106, Nov. 6, 1978, 92 Stat. 2776; Pub. L. 97–34, title I, §101(d)(3), Aug. 13, 1981, 95 Stat. 184; renumbered §15, Pub. L. 98–369, div. A, title IV, §474(b)(1), July 18, 1984, 98 Stat. 830; Pub. L. 99–514, title I, §101(b), Oct. 22, 1986, 100 Stat. 2099; Pub. L. 100–647, title I, §1006(a), Nov. 10, 1988, 102 Stat. 3393; Pub. L. 107–16, title I, §101(c)(3), June 7, 2001, 115 Stat. 43.)
Editorial Notes
Editorial Notes
Amendments
2001—Subsec. (f). Pub. L. 107–16, §101(c)(3), added subsec. (f).
1988—Subsec. (e). Pub. L. 100–647 added subsec. (e).
1986—Subsec. (d). Pub. L. 99–514 amended subsec. (d) generally, substituting "apply to inflation adjustments" for "apply to section 1 rate changes made by Economic Recovery Tax Act of 1981" in heading and struck out "section 1 attributable to the amendments made by section 101 of the Economic Tax Act of 1981 or" before "subsection (f)" in text.
1984—Pub. L. 98–369 renumbered section 21 of this title as this section.
1981—Subsec. (d). Pub. L. 97–34 substituted provisions that this section shall not apply to any change in rates under section 1 attributable to the amendments made by section 101 of the Economic Recovery Tax Act of 1981 or subsec. (f) of section 1 for provisions that had related to the changes made by section 303(b) of the Tax Reduction Act of 1975 in the surtax exemption.
Subsecs. (e), (f). Pub. L. 97–34 struck out subsecs. (e) and (f) which had related, respectively, to changes made by the Tax Reduction and Simplification Act of 1977 and to changes made by Revenue Act of 1978.
1978—Subsec. (f). Pub. L. 95–600 added subsec. (f).
1977—Subsec. (d). Pub. L. 95–30, §101(d)(2)(A), (B), redesignated subsec. (f) as (d). Former subsec. (d), which directed that, in applying subsec. (a) to a taxable year of an individual which was not a calendar year, each change made by the Tax Reform Act of 1969 in part I or in the application of part IV or V of subchapter B for purposes of the determination of taxable income should be treated as a change in a rate of tax, was struck out.
Subsec. (e). Pub. L. 95–30, §101(d)(2)(A), (C), added subsec. (e). Former subsec. (e), which directed that, in applying subsec. (a) to a taxable year of an individual which was not a calendar year, each change made by the Revenue Act of 1971 in section 141 (relating to the standard deduction) and section 151 (relating to personal exemptions) should be treated as a change in a rate of tax, was struck out.
Subsec. (f). Pub. L. 95–30, §101(d)(2)(B), redesignated subsec. (f) as (d).
1976—Subsec. (f). Pub. L. 94–455 substituted "in the surtax exemption and any change under section 11(d) in the surtax exemption" for "and the change made by section 3(c) of the Revenue Adjustment Act of 1975 in section 11(d) (relating to corporate surtax exemption)".
1975—Subsec. (f). Pub. L. 94–164 inserted reference to change made by section 3(c) of the Revenue Adjustment Act of 1975.
Pub. L. 94–12 added subsec. (f).
1971—Subsec. (e). Pub. L. 92–178 added subsec. (e).
1969—Subsec. (d). Pub. L. 91–172 substituted provisions covering changes made by the Tax Reform Act of 1969 in case of individuals for provisions covering changes made by Revenue Act of 1964.
1964—Subsec. (d). Pub. L. 88–272 amended subsection generally by substituting provisions relating to changes made by the Revenue Act of 1964, for provisions relating to taxable years beginning before Jan. 1, 1954, and ending after Dec. 31, 1953.
Statutory Notes and Related Subsidiaries
Effective Date of 2001 Amendment
Amendment by Pub. L. 107–16 applicable to taxable years beginning after Dec. 31, 2000, see section 101(d)(1) of Pub. L. 107–16, set out as an Effective and Termination Dates of 2001 Amendment note under section 1 of this title.
Effective Date of 1988 Amendment
Amendment by Pub. L. 100–647 effective, except as otherwise provided, as if included in the provision of the Tax Reform Act of 1986, Pub. L. 99–514, to which such amendment relates, see section 1019(a) of Pub. L. 100–647, set out as a note under section 1 of this title.
Effective Date of 1986 Amendment
Amendment by Pub. L. 99–514 applicable to taxable years beginning after Dec. 31, 1986, see section 151(a) of Pub. L. 99–514, set out as a note under section 1 of this title.
Effective Date of 1981 Amendment
Amendment by Pub. L. 97–34 applicable to taxable years beginning after Dec. 31, 1981, see section 101(f)(1) of Pub. L. 97–34, set out as a note under section 1 of this title.
Effective Date of 1977 Amendment
Amendment by Pub. L. 95–30 applicable to taxable years beginning after Dec. 31, 1976, see section 106(a) of Pub. L. 95–30, set out as a note under section 1 of this title.
Effective Date of 1976 Amendment
Amendment by Pub. L. 94–455 applicable with respect to taxable years ending after Dec. 31, 1975, see section 901(d) of Pub. L. 94–455, set out as a note under section 11 of this title.
Effective Date of 1975 Amendment
Amendment by Pub. L. 94–164 applicable to taxable years beginning after Dec. 31, 1975, see section 4(e) of Pub. L. 94–164, set out as an Effective and Termination Dates of 1975 Amendments note under section 11 of this title.
Effective Date of 1964 Amendment
Pub. L. 88–272, title I, §132, Feb. 26, 1964, 78 Stat. 30, provided that the amendment made by that section is effective with respect to taxable years ending after Dec. 31, 1963.
Coordination of 2025 Amendment With Section 15
Pub. L. 119–21, title VII, §70001(b), July 4, 2025, 139 Stat. 158, provided that: "Section 15 of the Internal Revenue Code of 1986 shall not apply to any change in rate of tax by reason of any provision of, or amendment made by, this title [see Tables for classification]."
Coordination of 2017 Amendment With Section 15
This section not to apply to any change in a rate of tax by reason of section 1(j) of this title, as added by Pub. L. 115–97, see section 1(j)(6) of this title.
Coordination of 1997 Amendment With Section 15
Pub. L. 105–34, title I, §1(c), Aug. 5, 1997, 111 Stat. 788, provided that: "No amendment made by this Act [see Tables for classification] shall be treated as a change in a rate of tax for purposes of section 15 of the Internal Revenue Code of 1986."
Coordination of 1993 Amendment With Section 15
Pub. L. 103–66, title XIII, §13001(c), Aug. 10, 1993, 107 Stat. 416, provided that: "Except in the case of the amendments made by section 13221 [amending sections 11, 852, 1201, and 1445 of this title] (relating to corporate rate increase), no amendment made by this chapter [chapter 1 (§§13001–13444) of title XIII of Pub. L. 103–66, see Tables for classification] shall be treated as a change in a rate of tax for purposes of section 15 of the Internal Revenue Code of 1986."
Coordination of 1990 Amendment With Section 15
Pub. L. 101–508, title XI, §11001(c), Nov. 5, 1990, 104 Stat. 1388–400, provided that: "Except as otherwise expressly provided in this title, no amendment made by this title [see Tables for classification] shall be treated as a change in a rate of tax for purposes of section 15 of the Internal Revenue Code of 1986."
Coordination of 1987 Amendment With Section 15
Pub. L. 100–203, title X, §10000(c), Dec. 22, 1987, 101 Stat. 1330–382, provided that: "No amendment made by this title [see Tables for classification] shall be treated as a change in a rate of tax for purposes [of] section 15 of the Internal Revenue Code of 1986."
Coordination of 1986 Amendment With Section 15
Pub. L. 99–514, §3(b), Oct. 22, 1986, 100 Stat. 2095, provided that:
"(1) In general.—Except as provided in paragraph (2), for purposes of section 15 of the Internal Revenue Code of 1986, no amendment or repeal made by this Act [see Tables for classification] shall be treated as a change in the rate of a tax imposed by chapter 1 of such Code.
"(2) Exception.—Paragraph (1) shall not apply to the amendment made by section 601 [amending section 11 of this title] (relating to corporate rate reductions)."
Editorial Notes
Amendments
2017—Pub. L. 115–97, title I, §13404(a), Dec. 22, 2017, 131 Stat. 2138, struck out items for subparts H "Nonrefundable credit to holders of clean renewable energy bonds", I "Qualified tax credit bonds", and J "Build America bonds".
2009—Pub. L. 111–5, div. B, title I, §1531(c)(6), Feb. 17, 2009, 123 Stat. 360, added item for subpart J.
2008—Pub. L. 110–234, title XV, §15316(c)(5), May 22, 2008, 122 Stat. 1511, and Pub. L. 110–246, title XV, §15316(c)(5), June 18, 2008, 122 Stat. 2273, made identical amendments, adding items for subparts H and I and striking out item for former subpart H "Nonrefundable credit to holders of certain bonds". The amendment by Pub. L. 110–234 was repealed by Pub. L. 110–246, §4(a), June 18, 2008, 122 Stat. 1664.
2005—Pub. L. 109–58, title XIII, §1303(c)(1), Aug. 8, 2005, 119 Stat. 996, added item for subpart H.
1996—Pub. L. 104–188, title I, §§1201(e)(3), 1601(b)(2)(F)(ii), Aug. 20, 1996, 110 Stat. 1772, 1833, substituted "Other credits" for "Foreign tax credit, etc." in item for subpart B and "work opportunity credit" for "targeted jobs credit" in item for subpart F.
1990—Pub. L. 101–508, title XI, §11813(b)(26), Nov. 5, 1990, 104 Stat. 1388–555, substituted "Rules for computing investment credit" for "Rules for computing credit for investment in certain depreciable property" in item for subpart E.
1984—Pub. L. 98–369, div. A, title IV, §§471(a), 474(n)(3), July 18, 1984, 98 Stat. 825, 834, substituted "Nonrefundable personal credits" for "Credits allowable" in item for subpart A, "Foreign tax credit, etc" for "Rules for computing credit for investment in certain depreciable property" in item for subpart B, "Refundable credits" for "Rules for computing credit for expense of work incentive programs" in item for subpart C, and "Business-related credits" for "Rules for computing credit for employment of certain new employees" in item for subpart D, and added items for subparts E and F.
1977—Pub. L. 95–30, title II, §202(d)(1)(B), May 23, 1977, 91 Stat. 147, added subpart D.
1971—Pub. L. 92–178, title VI, §601(c)(1), Dec. 10, 1971, 85 Stat. 557, added subpart C.
Editorial Notes
Amendments
2025—Pub. L. 119–21, title VII, §70411(a)(2)(B), July 4, 2025, 139 Stat. 217, added item 25F.
2022—Pub. L. 117–169, title I, §§13301(h)(2), 13302(c)(3), 13402(d), Aug. 16, 2022, 136 Stat. 1946, 1947, 1964, added items 25C to 25E and struck out former items 25C "Nonbusiness energy property" and 25D "Residential energy efficient property".
2018—Pub. L. 115–141, div. U, title I, §101(l)(10), Mar. 23, 2018, 132 Stat. 1165, substituted "American Opportunity and Lifetime Learning credits" for "Hope and Lifetime Learning credits" in item 25A.
2010—Pub. L. 111–148, title X, §10909(b)(2)(O), (c), Mar. 23, 2010, 124 Stat. 1023, as amended by Pub. L. 111–312, title I, §101(b)(1), Dec. 17, 2010, 124 Stat. 3298, temporarily struck out item 23 "Adoption expenses". See Effective and Termination Dates of 2010 Amendment note set out under section 1 of this title.
2005—Pub. L. 109–58, title XIII, §§1333(b)(2), 1335(b)(5), Aug. 8, 2005, 119 Stat. 1030, 1036, added items 25C and 25D.
2001—Pub. L. 107–16, title VI, §618(c), June 7, 2001, 115 Stat. 108, added item 25B.
1998—Pub. L. 105–206, title VI, §6004(a)(1), July 22, 1998, 112 Stat. 792, substituted "Hope and Lifetime Learning credits" for "Higher education tuition and related expenses" in item 25A.
1997—Pub. L. 105–34, title I, §101(d)(3), title II, §201(e), Aug. 5, 1997, 111 Stat. 799, 806, added items 24 and 25A.
1996—Pub. L. 104–188, title I, §1807(c)(6), Aug. 20, 1996, 110 Stat. 1902, added item 23.
1990—Pub. L. 101–508, title XI, §11801(b)(1), Nov. 5, 1990, 104 Stat. 1388–522, struck out item 23 "Residential energy credit".
1986—Pub. L. 99–514, title I, §112(b)(5), Oct. 22, 1986, 100 Stat. 2109, struck out item 24 "Contributions to candidates for public office".
1984—Pub. L. 98–369, div. A, title IV, §§471(b), 612(f), July 18, 1984, 98 Stat. 826, 913, substituted "Nonrefundable Personal Credits" for "Credits Allowable" as subpart A heading, struck out analysis of sections 31 through 45 formerly comprising subpart A, and inserted a new analysis of sections consisting of items 21 (formerly 44A), 22 (formerly 37), 23 (formerly 44C), 24 (formerly 41), and 25 and 26 (newly enacted).
1983—Pub. L. 98–67 repealed amendments made by Pub. L. 97–248. See 1982 Amendment note below.
Pub. L. 98–21, title I, §122(c)(7), Apr. 20, 1983, 97 Stat. 87, inserted "and the permanently and totally disabled" to item 37.
Pub. L. 97–424, title V, §515(b)(6)(D), Jan. 6, 1983, 96 Stat. 2181, substituted "and special fuels" for ", special fuels, and lubricating oil" after "gasoline" in item 39.
Pub. L. 97–414, §4(c)(1), Jan. 4, 1983, 96 Stat. 2056, added item 44H.
1982—Pub. L. 97–248, title III, §§307(b)(3), 308(a), Sept. 3, 1982, 96 Stat. 590, 591, provided that, applicable to payments of interest, dividends, and patronage dividends paid or credited after June 30, 1983, item 31 is amended to read "Tax withheld on wages, interest, dividends, and patronage dividends". Section 102(a), (b) of Pub. L. 98–67, title I, Aug. 5, 1983, 97 Stat. 369, repealed subtitle A (§§301–308) of title III of Pub. L. 97–248 as of the close of June 30, 1983, and provided that the Internal Revenue Code of 1954 [now 1986] [this title] shall be applied and administered (subject to certain exceptions) as if such subtitle A (and the amendments made by such subtitle A) had not been enacted.
1981—Pub. L. 97–34, title II, §221(c)(2), title III, §331(e)(2), Aug. 13, 1981, 95 Stat. 247, 295, added items 44F and 44G.
1980—Pub. L. 96–223, title II, §§231(b)(1), 232(b)(3)(B), Apr. 2, 1980, 94 Stat. 272, 276, added items 44D and 44E.
1978—Pub. L. 95–618, title I, §101(b)(1), Nov. 9, 1978, 92 Stat. 3179, added item 44C.
1977—Pub. L. 95–30, title I, §101(e)(1), title II, §202(d)(1)(A), May 23, 1977, 91 Stat. 134, 147, added item 44B and struck out item 36 "Credit not allowed to individuals taking standard deduction".
1976—Pub. L. 94–455, title IV, §401(a)(2)(D), title V, §§501(c)(2), 503(b)(5), 504(a)(2), title XIX, §1901(b)(1)(Z), Oct. 4, 1976, 90 Stat. 1555, 1559, 1562, 1565, 1792, substituted in item 42 "General tax credit" for "Taxable income credit", struck out in item 36 "pay optional tax or", inserted in item 33 "possession tax credit", substituted in item 37 "Credit of the elderly" for "Retirement income", added item 44A, and struck out item 35 "Partially tax-exempt interest received by individuals".
1975—Pub. L. 94–164, §3(a)(2), Dec. 23, 1975, 89 Stat. 973, substituted "Taxable income credit" for "Credit for personal exemptions" in item 42.
Pub. L. 94–12, title II, §§203(b)(1), 204(c), 208(d)(1), Mar. 29, 1975, 89 Stat. 30, 32, 35, renumbered item 42 as 45 and added item 42 applicable to taxable years ending after Dec. 31, 1974, but to cease to apply to taxable years ending after Dec. 31, 1975, item 43 applicable to taxable years beginning after Dec. 31, 1974, but before Jan. 1, 1976, and item 44.
1971—Pub. L. 92–178, title VI, §601(c)(2), Dec. 10, 1971, 85 Stat. 557, added items 40 and 41, and redesignated former item 40 as 42.
1970—Pub. L. 91–258, title II, §207(d)(10), May 21, 1970, 84 Stat. 249, inserted ", special fuels," after "gasoline" in item 39.
1965—Pub. L. 89–44, title VIII, §809(d)(1), June 21, 1965, 79 Stat. 167, added item 39 and redesignated former item 39 as 40.
1964—Pub. L. 88–272, title II, §201(d)(1), Feb. 26, 1964, 78 Stat. 32, struck out item 34.
1962—Pub. L. 87–834, §2(g)(1), (2), Oct. 16, 1962, 76 Stat. 972, 973, added headings of subparts A and B and item 38, and redesignated former item 38 as 39.
Amendments
2001—Subsec. (f). Pub. L. 107–16, §101(c)(3), added subsec. (f).
1988—Subsec. (e). Pub. L. 100–647 added subsec. (e).
1986—Subsec. (d). Pub. L. 99–514 amended subsec. (d) generally, substituting "apply to inflation adjustments" for "apply to section 1 rate changes made by Economic Recovery Tax Act of 1981" in heading and struck out "section 1 attributable to the amendments made by section 101 of the Economic Tax Act of 1981 or" before "subsection (f)" in text.
1984—Pub. L. 98–369 renumbered section 21 of this title as this section.
1981—Subsec. (d). Pub. L. 97–34 substituted provisions that this section shall not apply to any change in rates under section 1 attributable to the amendments made by section 101 of the Economic Recovery Tax Act of 1981 or subsec. (f) of section 1 for provisions that had related to the changes made by section 303(b) of the Tax Reduction Act of 1975 in the surtax exemption.
Subsecs. (e), (f). Pub. L. 97–34 struck out subsecs. (e) and (f) which had related, respectively, to changes made by the Tax Reduction and Simplification Act of 1977 and to changes made by Revenue Act of 1978.
1978—Subsec. (f). Pub. L. 95–600 added subsec. (f).
1977—Subsec. (d). Pub. L. 95–30, §101(d)(2)(A), (B), redesignated subsec. (f) as (d). Former subsec. (d), which directed that, in applying subsec. (a) to a taxable year of an individual which was not a calendar year, each change made by the Tax Reform Act of 1969 in part I or in the application of part IV or V of subchapter B for purposes of the determination of taxable income should be treated as a change in a rate of tax, was struck out.
Subsec. (e). Pub. L. 95–30, §101(d)(2)(A), (C), added subsec. (e). Former subsec. (e), which directed that, in applying subsec. (a) to a taxable year of an individual which was not a calendar year, each change made by the Revenue Act of 1971 in section 141 (relating to the standard deduction) and section 151 (relating to personal exemptions) should be treated as a change in a rate of tax, was struck out.
Subsec. (f). Pub. L. 95–30, §101(d)(2)(B), redesignated subsec. (f) as (d).
1976—Subsec. (f). Pub. L. 94–455 substituted "in the surtax exemption and any change under section 11(d) in the surtax exemption" for "and the change made by section 3(c) of the Revenue Adjustment Act of 1975 in section 11(d) (relating to corporate surtax exemption)".
1975—Subsec. (f). Pub. L. 94–164 inserted reference to change made by section 3(c) of the Revenue Adjustment Act of 1975.
Pub. L. 94–12 added subsec. (f).
1971—Subsec. (e). Pub. L. 92–178 added subsec. (e).
1969—Subsec. (d). Pub. L. 91–172 substituted provisions covering changes made by the Tax Reform Act of 1969 in case of individuals for provisions covering changes made by Revenue Act of 1964.
1964—Subsec. (d). Pub. L. 88–272 amended subsection generally by substituting provisions relating to changes made by the Revenue Act of 1964, for provisions relating to taxable years beginning before Jan. 1, 1954, and ending after Dec. 31, 1953.
Statutory Notes and Related Subsidiaries
Effective Date of 2001 Amendment
Amendment by Pub. L. 107–16 applicable to taxable years beginning after Dec. 31, 2000, see section 101(d)(1) of Pub. L. 107–16, set out as an Effective and Termination Dates of 2001 Amendment note under section 1 of this title.
Effective Date of 1988 Amendment
Amendment by Pub. L. 100–647 effective, except as otherwise provided, as if included in the provision of the Tax Reform Act of 1986, Pub. L. 99–514, to which such amendment relates, see section 1019(a) of Pub. L. 100–647, set out as a note under section 1 of this title.
Effective Date of 1986 Amendment
Amendment by Pub. L. 99–514 applicable to taxable years beginning after Dec. 31, 1986, see section 151(a) of Pub. L. 99–514, set out as a note under section 1 of this title.
Effective Date of 1981 Amendment
Amendment by Pub. L. 97–34 applicable to taxable years beginning after Dec. 31, 1981, see section 101(f)(1) of Pub. L. 97–34, set out as a note under section 1 of this title.
Effective Date of 1977 Amendment
Amendment by Pub. L. 95–30 applicable to taxable years beginning after Dec. 31, 1976, see section 106(a) of Pub. L. 95–30, set out as a note under section 1 of this title.
Effective Date of 1976 Amendment
Amendment by Pub. L. 94–455 applicable with respect to taxable years ending after Dec. 31, 1975, see section 901(d) of Pub. L. 94–455, set out as a note under section 11 of this title.
Effective Date of 1975 Amendment
Amendment by Pub. L. 94–164 applicable to taxable years beginning after Dec. 31, 1975, see section 4(e) of Pub. L. 94–164, set out as an Effective and Termination Dates of 1975 Amendments note under section 11 of this title.
Effective Date of 1964 Amendment
Pub. L. 88–272, title I, §132, Feb. 26, 1964, 78 Stat. 30, provided that the amendment made by that section is effective with respect to taxable years ending after Dec. 31, 1963.
Coordination of 2025 Amendment With Section 15
Pub. L. 119–21, title VII, §70001(b), July 4, 2025, 139 Stat. 158, provided that: "Section 15 of the Internal Revenue Code of 1986 shall not apply to any change in rate of tax by reason of any provision of, or amendment made by, this title [see Tables for classification]."
Coordination of 2017 Amendment With Section 15
This section not to apply to any change in a rate of tax by reason of section 1(j) of this title, as added by Pub. L. 115–97, see section 1(j)(6) of this title.
Coordination of 1997 Amendment With Section 15
Pub. L. 105–34, title I, §1(c), Aug. 5, 1997, 111 Stat. 788, provided that: "No amendment made by this Act [see Tables for classification] shall be treated as a change in a rate of tax for purposes of section 15 of the Internal Revenue Code of 1986."
Coordination of 1993 Amendment With Section 15
Pub. L. 103–66, title XIII, §13001(c), Aug. 10, 1993, 107 Stat. 416, provided that: "Except in the case of the amendments made by section 13221 [amending sections 11, 852, 1201, and 1445 of this title] (relating to corporate rate increase), no amendment made by this chapter [chapter 1 (§§13001–13444) of title XIII of Pub. L. 103–66, see Tables for classification] shall be treated as a change in a rate of tax for purposes of section 15 of the Internal Revenue Code of 1986."
Coordination of 1990 Amendment With Section 15
Pub. L. 101–508, title XI, §11001(c), Nov. 5, 1990, 104 Stat. 1388–400, provided that: "Except as otherwise expressly provided in this title, no amendment made by this title [see Tables for classification] shall be treated as a change in a rate of tax for purposes of section 15 of the Internal Revenue Code of 1986."
Coordination of 1987 Amendment With Section 15
Pub. L. 100–203, title X, §10000(c), Dec. 22, 1987, 101 Stat. 1330–382, provided that: "No amendment made by this title [see Tables for classification] shall be treated as a change in a rate of tax for purposes [of] section 15 of the Internal Revenue Code of 1986."
Coordination of 1986 Amendment With Section 15
Pub. L. 99–514, §3(b), Oct. 22, 1986, 100 Stat. 2095, provided that:
"(1) In general.—Except as provided in paragraph (2), for purposes of section 15 of the Internal Revenue Code of 1986, no amendment or repeal made by this Act [see Tables for classification] shall be treated as a change in the rate of a tax imposed by chapter 1 of such Code.
"(2) Exception.—Paragraph (1) shall not apply to the amendment made by section 601 [amending section 11 of this title] (relating to corporate rate reductions)."
Editorial Notes
Amendments
2017—Pub. L. 115–97, title I, §13404(a), Dec. 22, 2017, 131 Stat. 2138, struck out items for subparts H "Nonrefundable credit to holders of clean renewable energy bonds", I "Qualified tax credit bonds", and J "Build America bonds".
2009—Pub. L. 111–5, div. B, title I, §1531(c)(6), Feb. 17, 2009, 123 Stat. 360, added item for subpart J.
2008—Pub. L. 110–234, title XV, §15316(c)(5), May 22, 2008, 122 Stat. 1511, and Pub. L. 110–246, title XV, §15316(c)(5), June 18, 2008, 122 Stat. 2273, made identical amendments, adding items for subparts H and I and striking out item for former subpart H "Nonrefundable credit to holders of certain bonds". The amendment by Pub. L. 110–234 was repealed by Pub. L. 110–246, §4(a), June 18, 2008, 122 Stat. 1664.
2005—Pub. L. 109–58, title XIII, §1303(c)(1), Aug. 8, 2005, 119 Stat. 996, added item for subpart H.
1996—Pub. L. 104–188, title I, §§1201(e)(3), 1601(b)(2)(F)(ii), Aug. 20, 1996, 110 Stat. 1772, 1833, substituted "Other credits" for "Foreign tax credit, etc." in item for subpart B and "work opportunity credit" for "targeted jobs credit" in item for subpart F.
1990—Pub. L. 101–508, title XI, §11813(b)(26), Nov. 5, 1990, 104 Stat. 1388–555, substituted "Rules for computing investment credit" for "Rules for computing credit for investment in certain depreciable property" in item for subpart E.
1984—Pub. L. 98–369, div. A, title IV, §§471(a), 474(n)(3), July 18, 1984, 98 Stat. 825, 834, substituted "Nonrefundable personal credits" for "Credits allowable" in item for subpart A, "Foreign tax credit, etc" for "Rules for computing credit for investment in certain depreciable property" in item for subpart B, "Refundable credits" for "Rules for computing credit for expense of work incentive programs" in item for subpart C, and "Business-related credits" for "Rules for computing credit for employment of certain new employees" in item for subpart D, and added items for subparts E and F.
1977—Pub. L. 95–30, title II, §202(d)(1)(B), May 23, 1977, 91 Stat. 147, added subpart D.
1971—Pub. L. 92–178, title VI, §601(c)(1), Dec. 10, 1971, 85 Stat. 557, added subpart C.
Editorial Notes
Amendments
2025—Pub. L. 119–21, title VII, §70411(a)(2)(B), July 4, 2025, 139 Stat. 217, added item 25F.
2022—Pub. L. 117–169, title I, §§13301(h)(2), 13302(c)(3), 13402(d), Aug. 16, 2022, 136 Stat. 1946, 1947, 1964, added items 25C to 25E and struck out former items 25C "Nonbusiness energy property" and 25D "Residential energy efficient property".
2018—Pub. L. 115–141, div. U, title I, §101(l)(10), Mar. 23, 2018, 132 Stat. 1165, substituted "American Opportunity and Lifetime Learning credits" for "Hope and Lifetime Learning credits" in item 25A.
2010—Pub. L. 111–148, title X, §10909(b)(2)(O), (c), Mar. 23, 2010, 124 Stat. 1023, as amended by Pub. L. 111–312, title I, §101(b)(1), Dec. 17, 2010, 124 Stat. 3298, temporarily struck out item 23 "Adoption expenses". See Effective and Termination Dates of 2010 Amendment note set out under section 1 of this title.
2005—Pub. L. 109–58, title XIII, §§1333(b)(2), 1335(b)(5), Aug. 8, 2005, 119 Stat. 1030, 1036, added items 25C and 25D.
2001—Pub. L. 107–16, title VI, §618(c), June 7, 2001, 115 Stat. 108, added item 25B.
1998—Pub. L. 105–206, title VI, §6004(a)(1), July 22, 1998, 112 Stat. 792, substituted "Hope and Lifetime Learning credits" for "Higher education tuition and related expenses" in item 25A.
1997—Pub. L. 105–34, title I, §101(d)(3), title II, §201(e), Aug. 5, 1997, 111 Stat. 799, 806, added items 24 and 25A.
1996—Pub. L. 104–188, title I, §1807(c)(6), Aug. 20, 1996, 110 Stat. 1902, added item 23.
1990—Pub. L. 101–508, title XI, §11801(b)(1), Nov. 5, 1990, 104 Stat. 1388–522, struck out item 23 "Residential energy credit".
1986—Pub. L. 99–514, title I, §112(b)(5), Oct. 22, 1986, 100 Stat. 2109, struck out item 24 "Contributions to candidates for public office".
1984—Pub. L. 98–369, div. A, title IV, §§471(b), 612(f), July 18, 1984, 98 Stat. 826, 913, substituted "Nonrefundable Personal Credits" for "Credits Allowable" as subpart A heading, struck out analysis of sections 31 through 45 formerly comprising subpart A, and inserted a new analysis of sections consisting of items 21 (formerly 44A), 22 (formerly 37), 23 (formerly 44C), 24 (formerly 41), and 25 and 26 (newly enacted).
1983—Pub. L. 98–67 repealed amendments made by Pub. L. 97–248. See 1982 Amendment note below.
Pub. L. 98–21, title I, §122(c)(7), Apr. 20, 1983, 97 Stat. 87, inserted "and the permanently and totally disabled" to item 37.
Pub. L. 97–424, title V, §515(b)(6)(D), Jan. 6, 1983, 96 Stat. 2181, substituted "and special fuels" for ", special fuels, and lubricating oil" after "gasoline" in item 39.
Pub. L. 97–414, §4(c)(1), Jan. 4, 1983, 96 Stat. 2056, added item 44H.
1982—Pub. L. 97–248, title III, §§307(b)(3), 308(a), Sept. 3, 1982, 96 Stat. 590, 591, provided that, applicable to payments of interest, dividends, and patronage dividends paid or credited after June 30, 1983, item 31 is amended to read "Tax withheld on wages, interest, dividends, and patronage dividends". Section 102(a), (b) of Pub. L. 98–67, title I, Aug. 5, 1983, 97 Stat. 369, repealed subtitle A (§§301–308) of title III of Pub. L. 97–248 as of the close of June 30, 1983, and provided that the Internal Revenue Code of 1954 [now 1986] [this title] shall be applied and administered (subject to certain exceptions) as if such subtitle A (and the amendments made by such subtitle A) had not been enacted.
1981—Pub. L. 97–34, title II, §221(c)(2), title III, §331(e)(2), Aug. 13, 1981, 95 Stat. 247, 295, added items 44F and 44G.
1980—Pub. L. 96–223, title II, §§231(b)(1), 232(b)(3)(B), Apr. 2, 1980, 94 Stat. 272, 276, added items 44D and 44E.
1978—Pub. L. 95–618, title I, §101(b)(1), Nov. 9, 1978, 92 Stat. 3179, added item 44C.
1977—Pub. L. 95–30, title I, §101(e)(1), title II, §202(d)(1)(A), May 23, 1977, 91 Stat. 134, 147, added item 44B and struck out item 36 "Credit not allowed to individuals taking standard deduction".
1976—Pub. L. 94–455, title IV, §401(a)(2)(D), title V, §§501(c)(2), 503(b)(5), 504(a)(2), title XIX, §1901(b)(1)(Z), Oct. 4, 1976, 90 Stat. 1555, 1559, 1562, 1565, 1792, substituted in item 42 "General tax credit" for "Taxable income credit", struck out in item 36 "pay optional tax or", inserted in item 33 "possession tax credit", substituted in item 37 "Credit of the elderly" for "Retirement income", added item 44A, and struck out item 35 "Partially tax-exempt interest received by individuals".
1975—Pub. L. 94–164, §3(a)(2), Dec. 23, 1975, 89 Stat. 973, substituted "Taxable income credit" for "Credit for personal exemptions" in item 42.
Pub. L. 94–12, title II, §§203(b)(1), 204(c), 208(d)(1), Mar. 29, 1975, 89 Stat. 30, 32, 35, renumbered item 42 as 45 and added item 42 applicable to taxable years ending after Dec. 31, 1974, but to cease to apply to taxable years ending after Dec. 31, 1975, item 43 applicable to taxable years beginning after Dec. 31, 1974, but before Jan. 1, 1976, and item 44.
1971—Pub. L. 92–178, title VI, §601(c)(2), Dec. 10, 1971, 85 Stat. 557, added items 40 and 41, and redesignated former item 40 as 42.
1970—Pub. L. 91–258, title II, §207(d)(10), May 21, 1970, 84 Stat. 249, inserted ", special fuels," after "gasoline" in item 39.
1965—Pub. L. 89–44, title VIII, §809(d)(1), June 21, 1965, 79 Stat. 167, added item 39 and redesignated former item 39 as 40.
1964—Pub. L. 88–272, title II, §201(d)(1), Feb. 26, 1964, 78 Stat. 32, struck out item 34.
1962—Pub. L. 87–834, §2(g)(1), (2), Oct. 16, 1962, 76 Stat. 972, 973, added headings of subparts A and B and item 38, and redesignated former item 38 as 39.
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