Inflation Adjusted Items for Certain YearsFor inflation adjustment of certain items in this section, see Revenue Procedures listed in a table under
section 1 of this title.
Prior Provisions
A prior
section 23, added Pub. L. 95–618, title I, § 101(a), Nov. 9, 1978, 92 Stat. 3175, § 44C; amended Pub. L. 96–223, title II, §§ 201, 202(a)–(d), 203(a), Apr. 2, 1980, 94 Stat. 256, 258; renumbered § 23 and amended Pub. L. 98–369, div. A, title IV, §§ 471(c), 474(e), title VI, § 612(e)(2), July 18, 1984, 98 Stat. 826, 831, 912, related to residential energy credit, prior to repeal by Pub. L. 101–508, title XI, § 11801(a)(1), Nov. 5, 1990, 104 Stat. 1388–520.
Amendments
2025—Subsec. (a)(4). Pub. L. 119–21, § 70402(a), added par. (4). Subsec. (c)(1). Pub. L. 119–21, § 70402(c), which directed substitution of “portion of the credit allowable under subsection (a) which is allowed under this subpart” for “credit allowable under subsection (a)”, was executed by making the substitution both places appearing, to reflect the probable intent of Congress. Subsec. (d)(3)(A). Pub. L. 119–21, § 70403(a)(1), inserted “or Indian tribal government” after “a State”. Subsec. (d)(3)(B). Pub. L. 119–21, § 70403(a)(2), inserted “or Indian tribal government” after “such State”. Subsec. (h). Pub. L. 119–21, § 70402(b), amended subsec. (h) generally. Prior to amendment, text read as follows: “In the case of a taxable year beginning after
December 31, 2002, each of the dollar amounts in subsection (a)(3) and paragraphs (1) and (2)(A)(i) of subsection (b) shall be increased by an amount equal to— “(1) such dollar amount, multiplied by “(2) the cost-of-living adjustment determined under
section 1(f)(3) for the calendar year in which the taxable year begins, determined by substituting ‘calendar year 2001’ for ‘calendar year 2016’ in subparagraph (A)(ii) thereof. If any amount as increased under the preceding sentence is not a multiple of $10, such amount shall be rounded to the nearest multiple of $10.” 2018—Subsec. (c)(1). Pub. L. 115–141 substituted “
section 25D” for “
section 25D and
1400C”. 2017—Subsec. (h)(2). Pub. L. 115–97 substituted “for ‘calendar year 2016’ in subparagraph (A)(ii)” for “for ‘calendar year 1992’ in subparagraph (B)”. 2013—Subsec. (b)(4). Pub. L. 112–240, § 104(c)(2)(A)(i), struck out par. (4). Prior to amendment, text read as follows: “In the case of a taxable year to which
section 26(a)(2) does not apply, the credit allowed under subsection (a) for any taxable year shall not exceed the excess of— “(A) the sum of the regular tax liability (as defined in
section 26(b)) plus the tax imposed by
section 55, over “(B) the sum of the credits allowable under this subpart (other than this section and
section 25D) and
section 27 for the taxable year.” Subsec. (c). Pub. L. 112–240, § 104(c)(2)(A)(ii), (iii), added par. (1), redesignated par. (3) as (2), and struck out former pars. (1) and (2) which related to rule for years in which all personal credits allowed against regular and alternative minimum tax and rule for other years, respectively. 2010—Subsec. (a)(3). Pub. L. 111–148, § 10909(a)(1)(B), (c), as amended by Pub. L. 111–312, temporarily substituted “$13,170” for “$10,000” in heading and text. See Effective and Termination Dates of 2010 Amendment note below. Subsec. (b)(1). Pub. L. 111–148, § 10909(a)(1)(A), (c), as amended by Pub. L. 111–312, temporarily substituted “$13,170” for “$10,000”. See Effective and Termination Dates of 2010 Amendment note below. Subsec. (b)(4). Pub. L. 111–148, § 10909(b)(2)(I)(i), (c), as amended by Pub. L. 111–312, temporarily struck out par. (4). Text read as follows: “In the case of a taxable year to which
section 26(a)(2) does not apply, the credit allowed under subsection (a) for any taxable year shall not exceed the excess of— “(A) the sum of the regular tax liability (as defined in
section 26(b)) plus the tax imposed by
section 55, over “(B) the sum of the credits allowable under this subpart (other than this section and
section 25D) and
section 27 for the taxable year.” See Effective and Termination Dates of 2010 Amendment note below. Subsec. (c). Pub. L. 111–148, § 10909(b)(2)(I)(ii), (c), as amended by Pub. L. 111–312, temporarily struck out subsec. (c) which related to carryforwards of unused credit. See Effective and Termination Dates of 2010 Amendment note below. Subsec. (h). Pub. L. 111–148, § 10909(a)(1)(C), (c), as amended by Pub. L. 111–312, temporarily amended subsec. (h) generally. Prior to amendment, subsec. (h) related to adjustments for inflation. See Effective and Termination Dates of 2010 Amendment note below. 2008—Subsec. (b)(4)(B). Pub. L. 110–343 inserted “and
section 25D” after “this section”. 2005—Subsec. (b)(4). Pub. L. 109–135, § 402(i)(3)(A)(i), substituted “In the case of a taxable year to which
section 26(a)(2) does not apply, the credit” for “The credit” in introductory provisions. Subsec. (c). Pub. L. 109–135, § 402(i)(3)(A)(ii), reenacted heading without change and amended text generally. Prior to amendment, text read as follows: “If the credit allowable under subsection (a) for any taxable year exceeds the limitation imposed by subsection (b)(4) for such taxable year, such excess shall be carried to the succeeding taxable year and added to the credit allowable under subsection (a) for such taxable year. No credit may be carried forward under this subsection to any taxable year following the fifth taxable year after the taxable year in which the credit arose. For purposes of the preceding sentence, credits shall be treated as used on a first-in first-out basis.” Pub. L. 109–58, § 1335(b)(1), which directed amendment of subsec. (c) by substituting “this section,
section 25D, and
section 1400C” for “this section and
section 1400C”, was repealed by Pub. L. 109–135, § 402(i)(4). See Effective and Termination Dates of 2005 Amendment notes below. 2002—Subsec. (a)(1). Pub. L. 107–147, § 411(c)(1)(A), reenacted heading without change and amended text of par. (1) generally. Prior to amendment, text read as follows: “In the case of an individual, there shall be allowed as a credit against the tax imposed by this chapter— “(A) in the case of an adoption of a child other than a child with special needs, the amount of the qualified adoption expenses paid or incurred by the taxpayer, and “(B) in the case of an adoption of a child with special needs, $10,000.” Subsec. (a)(2). Pub. L. 107–147, § 411(c)(1)(C), struck out concluding provisions which read as follows: “In the case of the adoption of a child with special needs, the credit allowed under paragraph (1) shall be allowed for the taxable year in which the adoption becomes final.” Subsec. (a)(3). Pub. L. 107–147, § 411(c)(1)(B), added par. (3). Subsec. (b)(1). Pub. L. 107–147, § 411(c)(1)(D), substituted “subsection (a)” for “subsection (a)(1)(A)”. Subsec. (h). Pub. L. 107–147, § 418(a)(1), substituted “subsection (a)(3)” for “subsection (a)(1)(B)” in introductory provisions and inserted concluding provisions. Subsec. (i). Pub. L. 107–147, § 411(c)(1)(E), substituted “the dollar amounts in subsections (a)(3) and (b)(1)” for “the dollar limitation in subsection (b)(1)”. 2001—Subsec. (a)(1). Pub. L. 107–16, § 202(a)(1), amended heading and text of par. (1) generally. Prior to amendment, text read as follows: “In the case of an individual, there shall be allowed as a credit against the tax imposed by this chapter the amount of the qualified adoption expenses paid or incurred by the taxpayer.” Subsec. (a)(2). Pub. L. 107–16, § 202(c), inserted concluding provisions. Subsec. (b)(1). Pub. L. 107–16, § 202(b)(1)(A), substituted “subsection (a)(1)(A)” for “subsection (a)” and “$10,000” for “$5,000” and struck out “($6,000, in the case of a child with special needs)” before period at end. Subsec. (b)(2)(A)(i). Pub. L. 107–16, § 202(b)(2)(A), substituted “$150,000” for “$75,000”. Subsec. (b)(4). Pub. L. 107–16, § 202(f)(1), added par. (4). Subsec. (c). Pub. L. 107–16, § 202(f)(2)(A), substituted “subsection (b)(4)” for “
section 26(a)” and struck out “reduced by the sum of the credits allowable under this subpart (other than this section and
section 24 and
1400C)” before “, such excess”. Pub. L. 107–16, § 201(b)(2)(E), substituted “and
section 24 and
1400C” for “and
section 1400C”. Subsec. (d)(2). Pub. L. 107–16, § 202(d)(1), amended heading and text of par. (2) generally. Prior to amendment, text read as follows: “The term ‘eligible child’ means any individual— “(A) who— “(i) has not attained age 18, or “(ii) is physically or mentally incapable of caring for himself, and “(B) in the case of qualified adoption expenses paid or incurred after
December 31, 2001, who is a child with special needs.” Subsecs. (h), (i). Pub. L. 107–16, § 202(e)(1), added subsec. (h) and redesignated former subsec. (h) as (i). 1998—Subsec. (b)(2)(A). Pub. L. 105–206, § 6018(f)(1), inserted “(determined without regard to subsection (c))” after “for any taxable year” in introductory provisions. Subsec. (c). Pub. L. 105–206, § 6008(d)(6), inserted “and
section 1400C” after “other than this section”. 1997—Subsec. (a)(2). Pub. L. 105–34, § 1601(h)(2)(A), amended heading and text of par. (2) generally. Prior to amendment, text read as follows: “The credit under paragraph (1) with respect to any expense shall be allowed— “(A) for the taxable year following the taxable year during which such expense is paid or incurred, or “(B) in the case of an expense which is paid or incurred during the taxable year in which the adoption becomes final, for such taxable year.” Subsec. (b)(2)(B). Pub. L. 105–34, § 1601(h)(2)(B), substituted “determined without regard to
section 911, 931, and 933.” for “determined— “(i) without regard to
section 911, 931, and 933, and “(ii) after the application of
section 86, 135, 137, 219, and 469.”
Statutory Notes and Related Subsidiaries
Effective Date
of 2025 Amendment Pub. L. 119–21, title VII, § 70402(d), July 4, 2025, 139 Stat. 214, provided that: “The
Amendments
made by this section [amending this section] shall apply to taxable years beginning after
December 31, 2024.” Pub. L. 119–21, title VII, § 70403(b),
July 4, 2025, 139 Stat. 214, provided that: “The
Amendments
made by this section [amending this section] shall apply to taxable years beginning after December 31, 2024.”
Effective Date
of 2017 AmendmentAmendment by Pub. L. 115–97 applicable to taxable years beginning after Dec. 31, 2017, see
section 11002(e) of Pub. L. 115–97, set out as a note under
section 1 of this title.
Effective Date
of 2013 Amendment Pub. L. 112–240, title I, § 104(d), Jan. 2, 2013, 126 Stat. 2323, provided that: “The
Amendments
made by this section [amending this section and
section 24, 25, 25A, 25B, 25D, 26, 30, 30B, 30D, 55, 904, and 1400C of this title] shall apply to taxable years beginning after December 31, 2011.” Effective and Termination Dates of 2010 AmendmentAmendment by Pub. L. 111–148 terminated applicable to taxable years beginning after Dec. 31, 2011, and section is amended to read as if such amendment had never been enacted, see
section 10909(c) of Pub. L. 111–148, set out as a note under
section 1 of this title. Amendment by Pub. L. 111–148 applicable to taxable years beginning after Dec. 31, 2009, see
section 10909(d) of Pub. L. 111–148, set out as a note under
section 1 of this title. Effective and Termination Dates of 2008 Amendment Pub. L. 110–343, div. B, title I, § 106(f), Oct. 3, 2008, 122 Stat. 3817, provided that: “(1) In general.—Except as provided in paragraph (2), the
Amendments
made by this section [amending this section and
section 24, 25B, 25D, 26, and 45 of this title] shall apply to taxable years beginning after December 31, 2007. “(2) Solar electric property limitation.—The
Amendments
made by subsection (b) [amending
section 25D of this title] shall apply to taxable years beginning after December 31, 2008. “(3) Application of egtrra sunset.—The
Amendments
made by subparagraphs (A) and (B) of subsection (e)(2) [amending this section and
section 24 of this title] shall be subject to title IX of the Economic Growth and Tax Relief Reconciliation Act of 2001 [Pub. L. 107–16, § 901, which was repealed by Pub. L. 112–240, title I, § 101(a)(1), Jan. 2, 2013, 126 Stat. 2315, was formerly set out as an Effective and Termination Dates of 2001 Amendment note under
section 1 of this title] in the same manner as the provisions of such Act to which such
Amendments
relate.” Effective and Termination Dates of 2005 Amendment Pub. L. 109–135, title IV, § 402(i)(3)(H), Dec. 21, 2005, 119 Stat. 2615, provided that: “The
Amendments
made by this paragraph [amending this section and
section 24, 25, 25B, 25D, 904, and 1400C of this title] (and each part thereof) shall be subject to title IX of the Economic Growth and Tax Relief Reconciliation Act of 2001 [Pub. L. 107–16, § 901, which was repealed by Pub. L. 112–240, title I, § 101(a)(1), Jan. 2, 2013, 126 Stat. 2315, was formerly set out as an Effective and Termination Dates of 2001 Amendment note under
section 1 of this title] in the same manner as the provisions of such Act to which such amendment (or part thereof) relates.” Pub. L. 109–135, title IV, § 402(i)(4), Dec. 21, 2005, 119 Stat. 2615, struck out Pub. L. 109–58, § 1335(b)(1)–(3), and provided in part that: “The Internal Revenue Code of 1986 shall be applied and administered as if the
Amendments
made [by] such paragraphs [amending this section and
section 25 and
1400C of this title] had never been enacted.” Pub. L. 109–135, title IV, § 402(m), Dec. 21, 2005, 119 Stat. 2615, provided that: “(1) In general.—Except as provided in paragraphs (2) and (3), the
Amendments
made by this section [see Tables for classification] shall take effect as if included in the provisions of the Energy Policy Act of 2005 [Pub. L. 109–58] to which they relate. “(2) Repeal of public utility holding company act of 1935.—The
Amendments
made by subsection (a) [amending
section 121, 246, 247, 1223, 1245, and 1250 of this title and repealing sections
1081 to
1083 of this title] shall not apply with respect to any transaction ordered in compliance with the Public Utility Holding Company Act of 1935 [15 U.S.C. 79 et seq.] before its repeal. “(3) Coordination of personal credits.—The
Amendments
made by subsection (i)(3) [amending this section and
section 24, 25, 25B, 25D, 904, and 1400C of this title] shall apply to taxable years beginning after December 31, 2005.” Pub. L. 109–58, title XIII, § 1335(c), Aug. 8, 2005, 119 Stat. 1036, provided that: “The
Amendments
made by this section [enacting
section 25D of this title and amending this section and
section 25, 1016, and 1400C of this title] shall apply to property placed in service after December 31, 2005, in taxable years ending after such date.”
Effective Date
of 2002 Amendment Pub. L. 107–147, title IV, § 411(c)(3), Mar. 9, 2002, 116 Stat. 46, provided that: “The
Amendments
made by this subsection [amending this section and
section 137 of this title] shall apply to taxable years beginning after December 31, 2002; except that the
Amendments
made by paragraphs (1)(C), (1)(D) [amending this section], and (2)(B) [amending
section 137 of this title] shall apply to taxable years beginning after December 31, 2001.” Amendment by
section 418(a)(1) of Pub. L. 107–147 effective as if included in the provisions of the Economic Growth and Tax Relief Reconciliation Act of 2001, Pub. L. 107–16, to which such amendment relates, see
section 418(c) of Pub. L. 107–147, set out as a note under
section 21 of this title.
Effective Date
of 2001 Amendment Pub. L. 108–311, title III, § 312(b)(2), Oct. 4, 2004, 118 Stat. 1181, provided that: “The
Amendments
made by
section 201(b), 202(f), and 618(b) of the Economic Growth and Tax Relief Reconciliation Act of 2001 [Pub. L. 107–16, amending this section and
section 24, 25, 25B, 26, 904, and 1400C of this title] shall not apply to taxable years beginning during 2004 or 2005.” Pub. L. 107–147, title VI, § 601(b)(2), Mar. 9, 2002, 116 Stat. 59, provided that: “The
Amendments
made by
section 201(b), 202(f), and 618(b) of the Economic Growth and Tax Relief Reconciliation Act of 2001 [Pub. L. 107–16, amending this section and
section 24, 25, 25B, 26, 904, and 1400C of this title] shall not apply to taxable years beginning during 2002 and 2003.” Amendment by
section 201(b)(2)(E) of Pub. L. 107–16 applicable to taxable years beginning after Dec. 31, 2001, see
section 201(e)(2) of Pub. L. 107–16, set out as a note under
section 24 of this title. Pub. L. 107–16, title II, § 202(g), June 7, 2001, 115 Stat. 49, provided that: “(1) In general.—Except as provided in paragraph (2), the
Amendments
made by this section [amending this section and
section 24, 26, 137, 904, and 1400C of this title] shall apply to taxable years beginning after December 31, 2001. “(2) Subsection (a).—The
Amendments
made by subsection (a) [amending this section and
section 137 of this title] shall apply to taxable years beginning after December 31, 2002.”
Effective Date
of 1998 Amendment Pub. L. 105–206, title VI, § 6018(h), July 22, 1998, 112 Stat. 823, provided that: “The
Amendments
made by this section [amending this section and
section 219, 408, 414, and 679 of this title and amending provisions set out as notes under
section 167 and
4091 of this title] shall take effect as if included in the provisions of the Small Business Job Protection Act of 1996 [Pub. L. 104–188] to which they relate.” Amendment by
section 6008(d)(6) of Pub. L. 105–206 effective, except as otherwise provided, as if included in the provisions of the Taxpayer Relief Act of 1997, Pub. L. 105–34, to which such amendment relates, see
section 6024 of Pub. L. 105–206, set out as a note under
section 1 of this title.
Effective Date
of 1997 Amendment Pub. L. 105–34, title XVI, § 1601(j), Aug. 5, 1997, 111 Stat. 1093, provided that: “(1) In general.—Except as provided in paragraph (2), the
Amendments
made by this section [amending this section,
section 30A, 52, 55, 137, 401, 403, 404, 408, 414, 512, 529, 593, 641, 679, 860L, 956, 1361, 1374, 4001, 4041, 4092, 4261, 6039D, 6048, 6050R, 6501, 6693, 7701, and 9503 of this title,
section 1055 of Title 29, Labor, and provisions set out as notes under
section 529 and
4091 of this title] shall take effect as if included in the provisions of the Small Business Job Protection Act of 1996 [Pub. L. 104–188] to which they relate. “(2) Certain administrative requirements with respect to certain pension plans.—The amendment made by subsection (d)(2)(D) [amending
section 401 of this title] shall apply to calendar years beginning after the date of the enactment of this Act [Aug. 5, 1997].”
Effective Date
Pub. L. 104–188, title I, § 1807(e), Aug. 20, 1996, 110 Stat. 1903, provided that: “The
Amendments
made by this section [enacting this section and
section 137 of this title, renumbering former
section 137 of this title as
section 138, and amending
section 25, 86, 135, 219, 469, and 1016 of this title] shall apply to taxable years beginning after December 31, 1996.”
Savings Provision
Amendment by Pub. L. 115–141 not applicable to certain obligations issued, DC Zone assets acquired, or principal residences acquired before Jan. 1, 2012, see
section 401(d)(4)(C) of Pub. L. 115–141, set out as a note under former
section 1400 of this title. Pub. L. 115–141, div. U, title IV, § 401(e), Mar. 23, 2018, 132 Stat. 1212, provided that: “If—“(1) any provision amended or repealed by the
Amendments
made by subsection (b) or (d) [see Tables for classification] applied to—“(A) any transaction occurring before the date of the enactment of this Act [Mar. 23, 2018], “(B) any property acquired before such date of enactment, or “(C) any item of income, loss, deduction, or credit taken into account before such date of enactment, and “(2) the treatment of such transaction, property, or item under such provision would (without regard to the
Amendments
or
Repeals
made by such subsection) affect the liability for tax for periods ending after such date of enactment, nothing in the
Amendments
or
Repeals
made by this section [see Tables for classification] shall be construed to affect the treatment of such transaction, property, or item for purposes of determining liability for tax for periods ending after such date of enactment.” Expenses Paid or Incurred Before 2002 Pub. L. 107–147, title IV, § 411(c)(1)(F), Mar. 9, 2002, 116 Stat. 45, provided that: “Expenses paid or incurred during any taxable year beginning before
January 1, 2002, may be taken into account in determining the credit under
section 23 of the Internal Revenue Code of 1986 only to the extent the aggregate of such expenses does not exceed the applicable limitation under
section 23(b)(1) of such Code as in effect on the day before the date of the enactment of the Economic Growth and Tax Relief Reconciliation Act of 2001 [
June 7, 2001].” Tax Credit and Gross Income Exclusion Study and Report Pub. L. 104–188, title I, § 1807(d), Aug. 20, 1996, 110 Stat. 1903, provided that: “The Secretary of the Treasury shall study the effect on adoptions of the tax credit and gross income exclusion established by the
Amendments
made by this section [enacting this section and
section 137 of this title, renumbering former
section 137 of this title as
section 138, and amending
section 25, 86, 135, 219, 469, and 1016 of this title] and shall submit a report regarding the study to the Committee on Finance of the Senate and the Committee on Ways and Means of the House of Representatives not later than January 1, 2000.”