Internal Revenue Code · 26 U.S.C.
§ 26. Limitation based on tax liability; definition of tax liability
Official text, no changes From the Office of the Law Revision Counsel, release point 119-121 (current through Public Law 119-121 (October 9, 2026)). Compare it with the official text at uscode.house.gov (external site).
Cite as 26 U.S.C. § 26
At a glance
Read from the text, the source credit and the official notes. Not part of the law.
- Status
- In force
- Added
- July 18, 1984 by Pub. L. 98–369
- Last amended
- March 11, 2021 by Pub. L. 117–2
- Amendments
- 27 dated changes in the source credit
- Length
- 3 subsections · 1,003 words · about 4 min to read
- Defines
- 2 terms
- Cross-references
- cites 29; cited by 13 Code sections and 16 other regulations
The term “regular tax liability” means the tax imposed by this chapter for the taxable year.
For purposes of this part, the term “tentative minimum tax” means the amount determined under section 55(b)(1).
(Added § 25, renumbered § 26, Pub. L. 98–369, div. A, title IV, § 472, title VI, § 612(a), July 18, 1984, 98 Stat. 827, 905; amended Pub. L. 99–499, title V, § 516(b)(1)(A), Oct. 17, 1986, 100 Stat. 1770; Pub. L. 99–514, title II, § 261(c), title VI, § 632(c)(1), title VII, § 701(c)(1), Oct. 22, 1986, 100 Stat. 2214, 2277, 2340; Pub. L. 100–647, title I, §§ 1006(t)(16)(C), 1007(g)(1), 1011A(c)(10), 1012(q)(8), title IV, § 4005(g)(4), title V, § 5012(b)(2), Nov. 10, 1988, 102 Stat. 3425, 3434, 3476, 3524, 3650, 3662; Pub. L. 101–239, title VII, §§ 7811(c)(1), (2), 7821(a)(4)(A), Dec. 19, 1989, 103 Stat. 2406, 2407, 2424; Pub. L. 104–188, title I, § 1621(b)(1), Aug. 20, 1996, 110 Stat. 1866; Pub. L. 105–34, title II, § 213(e)(1), title XVI, § 1602(a)(1), Aug. 5, 1997, 111 Stat. 817, 1093; Pub. L. 105–277, div. J, title II, § 2001(a), Oct. 21, 1998, 112 Stat. 2681–901; Pub. L. 106–170, title V, § 501(a), Dec. 17, 1999, 113 Stat. 1918; Pub. L. 106–554, § 1(a)(7) [title II, § 202(a)(1)], Dec. 21, 2000, 114 Stat. 2763, 2763A–628; Pub. L. 107–16, title II, §§ 201(b)(2)(D), 202(f)(2)(C), title VI, § 618(b)(2)(C), June 7, 2001, 115 Stat. 46, 49, 108; Pub. L. 107–22, § 1(b)(2)(A), July 26, 2001, 115 Stat. 197; Pub. L. 107–147, title IV, §§ 415(a), 417(23)(B), title VI, § 601(a), Mar. 9, 2002, 116 Stat. 54, 57, 59; Pub. L. 108–311, title III, § 312(a), title IV, §§ 401(a)(1), 408(a)(5)(A), Oct. 4, 2004, 118 Stat. 1181, 1183, 1191; Pub. L. 109–135, title IV, §§ 403(hh)(1), 412(c), Dec. 21, 2005, 119 Stat. 2631, 2636; Pub. L. 109–222, title III, § 302(a), May 17, 2006, 120 Stat. 353; Pub. L. 110–166, § 3(a), Dec. 26, 2007, 121 Stat. 2461; Pub. L. 110–172, § 11(a)(3), Dec. 29, 2007, 121 Stat. 2484; Pub. L. 110–289, div. C, title I, § 3011(b)(1), July 30, 2008, 122 Stat. 2891; Pub. L. 110–343, div. B, title I, § 106(e)(2)(D), title II, § 205(d)(1)(D), div. C, title I, § 101(a), title VIII, § 801(b), Oct. 3, 2008, 122 Stat. 3817, 3839, 3863, 3931; Pub. L. 111–5, div. B, title I, §§ 1004(b)(3), 1011(a), 1142(b)(1)(D), 1144(b)(1)(D), Feb. 17, 2009, 123 Stat. 314, 319, 330, 332; Pub. L. 111–148, title X, § 10909(b)(2)(E), (c), Mar. 23, 2010, 124 Stat. 1023; Pub. L. 111–312, title I, § 101(b)(1), title II, § 202(a), Dec. 17, 2010, 124 Stat. 3298, 3299; Pub. L. 112–240, title I, § 104(c)(1), Jan. 2, 2013, 126 Stat. 2321; Pub. L. 113–295, div. A, title II, § 221(a)(12)(B), div. B, title I, § 102(e)(1), Dec. 19, 2014, 128 Stat. 4038, 4062; Pub. L. 115–97, title I, § 14401(c), Dec. 22, 2017, 131 Stat. 2233; Pub. L. 115–141, div. U, title IV, § 401(b)(2), (d)(1)(D)(ii), Mar. 23, 2018, 132 Stat. 1201, 1206; Pub. L. 117–2, title IX, § 9611(b)(4)(A), Mar. 11, 2021, 135 Stat. 150.)
Terms defined here
Where the text says “the term … means”. Select a term to jump to its definition.
Cross-references
Computed from the citations in the text of Title 26 and 26 CFR.
This section cites 29 other sections
- § 27 Taxes of foreign countries and possessions of the United States
- § 55(a) Alternative minimum tax imposed
- § 59A Tax on base erosion payments of taxpayers with substantial gross receipts
- § 72 Annuities; certain proceeds of endowment and life insurance contracts
- § 143(m) Mortgage revenue bonds: qualified mortgage bond and qualified veterans’ mortgage bond
- § 530(d)(4) Coverdell education savings accounts
- § 531 Imposition of accumulated earnings tax
- § 541 Imposition of personal holding company tax
- § 1351(d)(1) Treatment of recoveries of foreign expropriation losses
- § 1374 Tax imposed on certain built-in gains
- § 1375 Tax imposed when passive investment income of corporation having accumulated earnings and profits exceeds 25 percent of gross receipts
- § 7518(g)(6) Tax incentives relating to merchant marine capital construction funds
- § 871(a) Tax on nonresident alien individuals
- § 881 Tax on income of foreign corporations not connected with United States business
- § 860E(e) Treatment of income in excess of daily accruals on residual interests
- § 884 Branch profits tax
- § 453 Installment method
- § 401(b)(2) Qualified pension, profit-sharing, and stock bonus plans
- § 220(f)(4) Archer MSAs
- § 138(c)(2) Medicare Advantage MSA
- § 106(e)(3)(A)(ii) Contributions by employer to accident and health plans
- § 223(b)(8)(B)(i)(II) Health savings accounts
- § 408(d)(9)(D)(i)(II) Individual retirement accounts
- § 170 Charitable, etc., contributions and gifts
Show 5 more
Cited by 13 Code sections
- § 23(c)(1) Adoption expenses
- § 24(d)(1)(A) Child tax credit
- § 25(e)(1)(C) Interest on certain home mortgages
- § 25A(i) American Opportunity and Lifetime Learning credits
- § 25D(c) Residential clean energy credit
- § 25F(f)(1) Qualified elementary and secondary education scholarships
- § 30C(d)(2)(A) Alternative fuel vehicle refueling property credit
- § 55(c)(1) Alternative minimum tax imposed
- § 59A(b)(1)(B) Tax on base erosion payments of taxpayers with substantial gross receipts
- § 163(g) Interest
- § 469(j)(3) Passive activity losses and credits limited
- § 901(a) Taxes of foreign countries and of possessions of United States
- § 7851(a)(1)(D)(i) Applicability of revenue laws
Cited in 16 regulations not issued under it
- § 1.25-2T Amount of credit (Temporary).
- § 1.25E-3 Transfer of credit.
- § 1.28-1 Credit for clinical testing expenses for certain drugs for rare diseases or conditions.
- § 1.30D-1 Credit for new clean vehicles.
- § 1.30D-5 Transfer of credit.
- § 1.59A-1 Base erosion and anti-abuse tax.
- § 1.163-6T Reduction of deduction where section 25 credit taken (temporary).
- § 1.383-1 Special limitations on certain capital losses and excess credits.
- § 1.469-1T General rules (temporary).
- § 1.469-3T Passive activity credit (temporary).
- § 1.901-1 Allowance of credit for foreign income taxes.
- § 1.965-7 Elections, payment, and other special rules.
- § 1.1502-3 Consolidated tax credits.
- § 1.1502-4 Consolidated foreign tax credit.
- § 1.1502-55 Computation of alternative minimum tax of consolidated groups.
- § 301.6362-7 Additional requirements.
Amendment history
From the source credit and the official notes, newest first.
- Amended by Pub. L. 117–2Parts changed in 2021: (b)(2)(Z)
- Amended by Pub. L. 115–141Parts changed in 2018: (a)(1) (b)(2)(P)
- Amended by Pub. L. 115–97Parts changed in 2017: (b)(2)(B)
- Amended by Pub. L. 113–295Parts changed in 2014: (b)(2)(B) (b)(2)(Y)
- Amended by Pub. L. 112–240Parts changed in 2013: (a)
- Amended by Pub. L. 111–312Parts changed in 2010: (a)(1) (a)(2)
- Amended by Pub. L. 111–148
- Amended by Pub. L. 111–5Parts changed in 2009: (a)(1) (a)(2)
- Amended by Pub. L. 110–343Parts changed in 2008: (a)(1) (a)(2) (b)(2)(W) (b)(2)(X)
- Amended by Pub. L. 110–289
- Amended by Pub. L. 110–172Parts changed in 2007: (a)(2) (b)(2)(S)
- Amended by Pub. L. 110–166
- Amended by Pub. L. 109–222Parts changed in 2006: (a)(2)
- Amended by Pub. L. 109–135Parts changed in 2005: (b)(2)(E) (b)(2)(T)
- Amended by Pub. L. 108–311Parts changed in 2004: (a)(2) (b)(2)(R) (b)(2)(S)
- Amended by Pub. L. 107–147Parts changed in 2002: (a)(1) (a)(2) (b)(2)(P) (b)(2)(R)
- Amended by Pub. L. 107–22Parts changed in 2001: (a)(1) (b)(2)(E)
- Amended by Pub. L. 107–16
- Amended by Pub. L. 106–554Parts changed in 2000: (b)(2)(Q)
- Amended by Pub. L. 106–170Parts changed in 1999: (a)
- Amended by Pub. L. 105–277Parts changed in 1998: (a)
- Amended by Pub. L. 105–34Parts changed in 1997: (b)(2)(E) (b)(2)(P) (b)(2)(Q)
- Amended by Pub. L. 104–188Parts changed in 1996: (b)(2)(O)
- Amended by Pub. L. 101–239Parts changed in 1989: (b)(2)(C) (b)(2)(K) (b)(2)(L) (b)(2)(N)
- Amended by Pub. L. 100–647Parts changed in 1988: (b)(2)(C) (b)(2)(D) (b)(2)(K) (b)(2)(L) (b)(2)(M)
- Amended by Pub. L. 99–514Parts changed in 1986: (a) (b) (b)(1) (b)(2) (c)
- Amended by Pub. L. 99–499
- Added by Pub. L. 98–369
Where it sits in the Code
- Subtitle A Income Taxes
- Chapter 1 NORMAL TAXES AND SURTAXES
- Subchapter A Determination of Tax Liability
- Part IV CREDITS AGAINST TAX
- Subpart A Nonrefundable Personal Credits
Nearby sections
- § 25C Energy efficient home improvement credit
- § 25D Residential clean energy credit
- § 25E Previously-owned clean vehicles
- § 25F Qualified elementary and secondary education scholarships
- § 26 Limitation based on tax liability; definition of tax liability
Official notes
The Law Revision Counsel's notes for this section (amendments, effective dates and related laws) are long, so they have their own page.