The Social Security Act, referred to in subsecs. (a)(1) and (d)(1)(A), (3), (4)(A), (5), is act Aug. 14, 1935, ch. 531, 49 Stat. 620, as amended, which is classified generally to chapter 7 (§ 301 et seq.) of Title 42, The Public Health and Welfare. Title II of the Act is classified generally to subchapter II (§ 401 et seq.) of Title 42. Sections 207, 224, and 708 of the Act are classified to sections 407, 424a, and 909 of Title 42, respectively. For complete classification of this Act to the Code, see section 1305 of Title 42 and Tables.

The Railroad Retirement Act of 1974, referred to in subsec. (d)(3), (4), is act Aug. 29, 1935, ch. 812, as amended generally by Pub. L. 93–445, title I, § 101, Oct. 16, 1974, 88 Stat. 1305, which is classified generally to subchapter IV (§ 231 et seq.) of chapter 9 of Title 45, Railroads. Section 3(a)(1), (f)(3) of the Act is classified to section 231b (a)(1), (f)(3) of Title 45. For further details and complete classification of this Act to the Code, see Codification note set out preceding section 231 of Title 45, section 231t of Title 45, and Tables.

A prior section 86 was renumbered section 87 of this title.

2004—Subsec. (b)(2)(A). Pub. L. 108–357 inserted “199,” before “221”.

2001—Subsec. (b)(2)(A). Pub. L. 107–16, §§ 431(c)(1), 901, temporarily inserted “222,” after “221,”. See Effective and Termination Dates of 2001 Amendment note below.

1998—Subsec. (b)(2)(A). Pub. L. 105–277 inserted “221,” after “137,”.

1996—Subsec. (b)(2). Pub. L. 104–188, § 1704(t)(3), substituted “means adjusted” for “means adusted” in introductory provisions.

Subsec. (b)(2)(A). Pub. L. 104–188, § 1807(c)(2), inserted “137,” before “911”.

1994—Subsec. (d)(1). Pub. L. 103–296 struck out at end “For purposes of the preceding sentence, the amount received by any taxpayer shall be determined as if the Social Security Act did not contain section 203 (i) thereof.”

1993—Subsec. (a). Pub. L. 103–66, § 13215(a), designated existing provisions as par. (1), inserted par. (1) heading, substituted “Except as provided in paragraph (2), gross” for “Gross”, redesignated former pars. (1) and (2) as subpars. (A) and (B), respectively, and added par. (2).

Subsec. (c). Pub. L. 103–66, § 13215(b), amended heading and text of subsec. (c) generally. Prior to amendment, text read as follows: “For purposes of this section, the term ‘base amount’ means—

“(1) except as otherwise provided in this subsection, $25,000,

“(2) $32,000, in the case of a joint return, and

“(3) zero, in the case of a taxpayer who—

“(A) is married at the close of the taxable year (within the meaning of section 7703) but does not file a joint return for such year, and

“(B) does not live apart from his spouse at all times during the taxable year.”

1988—Subsec. (b)(2)(A). Pub. L. 100–647, § 6009(c)(1), inserted “135,” before “911”.

Subsec. (f)(4), (5). Pub. L. 100–647, § 1001(e), redesignated par. (5) as (4) and struck out former par. (4) which read as follows: “section 221 (b)(2) (defining earned income), and”.

1986—Subsec. (b)(2)(A). Pub. L. 99–514, § 131(b)(2), substituted “sections” for “sections 221,”.

Subsec. (c)(3)(A). Pub. L. 99–514, § 1301(j)(8), substituted “section 7703” for “section 143”.

Subsec. (d)(4). Pub. L. 99–272, § 13204(a), in amending par. (4) generally, designated existing provisions as introductory clause of par. (4), struck out “a monthly benefit under section 3(a), 3(f)(3), 4(a), or 4(f) of the Railroad Retirement Act of 1974”, and added cls. (A) and (B).

Subsec. (d)(5). Pub. L. 99–272, § 12111(b), added par. (5).

Subsec. (f)(1). Pub. L. 99–514, § 1847(b)(2), substituted “section 22 (c)(3)(A)” for “section 37 (c)(3)(A)”.

1984—Subsec. (f)(1). Pub. L. 98–369, § 2661(o)(1), added par. (1). Former par. (1) redesignated par. (2).

Pub. L. 98–369, § 474(r)(2), substituted “section 32 (c)(2)” for “section 43 (c)(2)”.

Subsec. (f)(2)–(5). Pub. L. 98–369, § 2661(o)(1), redesignated pars. (1) to (4) as (2) to (5), respectively.

1983—Subsec. (a). Pub. L. 98–21, § 335(b)(2)(A), inserted “(notwithstanding section 207 of the Social Security Act)”.

Subsec. (d)(4). Pub. L. 98–76 inserted “3(f)(3),” after “3(a),”.

Amendment by Pub. L. 108–357 applicable to taxable years beginning after Dec. 31, 2004, see section 102(e) of Pub. L. 108–357, set out as a note under section 56 of this title.

Amendment by Pub. L. 107–16 applicable to payments made in taxable years beginning after Dec. 31, 2001, see section 431(d) of Pub. L. 107–16, set out as a note under section 62 of this title.

Amendment by Pub. L. 107–16 inapplicable to taxable, plan, or limitation years beginning after Dec. 31, 2010, and the Internal Revenue Code of 1986 to be applied and administered to such years as if such amendment had never been enacted, see section 901 of Pub. L. 107–16, set out as a note under section 1 of this title.

Pub. L. 105–277, div. J, title IV, § 4003(l), Oct. 21, 1998, 112 Stat. 2681–910, provided that: “The amendments made by this section [amending this section and sections 135, 137, 163, 172, 219, 221, 264, 351, 368, 469, 954, 2001, 6311, 6404, and 9510 of this title and amending provisions set out as a note under section 7508A of this title] shall take effect as if included in the provisions of the 1997 Act [Pub. L. 105–34] to which they relate.”

Amendment by section 1807(c)(2) of Pub. L. 104–188 applicable to taxable years beginning after Dec. 31, 1996, see section 1807(e) of Pub. L. 104–188, set out as an Effective Date note under section 23 of this title.

Section 309(e)(2) of Pub. L. 103–296 provided that: “The amendment made by subsection (d) [amending this section] shall apply with respect to benefits received after December 31, 1995, in taxable years ending after such date.”

Section 13215(d) of Pub. L. 103–66 provided that: “The amendments made by subsections (a) and (b) [amending this section] shall apply to taxable years beginning after December 31, 1993.”

Amendment by section 1001(e) of 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.

Section 6009(d) of Pub. L. 100–647 provided that: “The amendments made by this section [enacting section 135 of this title, amending this section and sections 219 and 469 of this title, and renumbering former section 135 as section 136 of this title] shall apply to taxable years beginning after December 31, 1989.”

Amendment by section 131(b)(2) of 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.

Amendment by section 1301(j)(8) of Pub. L. 99–514 applicable to bonds issued after Aug. 15, 1986, except as otherwise provided, see sections 1311–1318 of Pub. L. 99–514, set out as an Effective Date; Transitional Rules note under section 141 of this title.

Amendment by section 1847(b)(2) of Pub. L. 99–514 effective, except as otherwise provided, as if included in the provisions of the Tax Reform Act of 1984, Pub. L. 98–369, div. A, to which such amendment relates, see section 1881 of Pub. L. 99–514, set out as a note under section 48 of this title.

Amendment by section 12111(b) of Pub. L. 99–272 applicable with respect to benefit checks issued for months ending after Apr. 7, 1986, see section 12111(c) of Pub. L. 99–272, set out as a note under section 909 of Title 42, The Public Health and Welfare.

Section 13204(b) of Pub. L. 99–272 provided that: “The amendment made by subsection (a) [amending this section] shall apply to any monthly benefit for which the generally applicable payment date is after December 31, 1985.”

Amendment by section 474(r)(2) of Pub. L. 98–369 applicable to taxable years beginning after Dec. 31, 1983, and to carrybacks from such years, see section 475(a) of Pub. L. 98–369, set out as a note under section 21 of this title.

Amendment by section 2661 of Pub. L. 98–369 effective as though included in the enactment of the Social Security Amendments of 1983, Pub. L. 98–21, see section 2664(a) of Pub. L. 98–369, set out as a note under section 401 of Title 42, The Public Health and Welfare.

Amendment by Pub. L. 98–76 applicable to benefits received after Dec. 31, 1983, in taxable years ending after such date, except for portions of lump-sum payments received after Dec. 31, 1983, if the generally applicable payment date for such portion was before Jan. 1, 1984, see section 227(b) of Pub. L. 98–76 set out as a note under section 72 of this title.

Section 121(g) of Pub. L. 98–21, as amended by Pub. L. 99–514, § 2, Oct. 22, 1986, 100 Stat. 2095, provided that:

“(1) In general.—Except as provided in paragraph (2), the amendments made by this section [enacting this section and section 6050F of this title, amending sections 85, 128, 861, 871, 1441, and 6103 of this title and section 3413 of Title 12, Banks and Banking, and enacting provisions set out as a note under section 401 of Title 42, The Public Health and Welfare] shall apply to benefits received after December 31, 1983, in taxable years ending after such date.

“(2) Treatment of certain lump-sum payments received after december 31, 1983.—The amendments made by this section shall not apply to any portion of a lump-sum payment of social security benefits (as defined in section 86(d) of the Internal Revenue Code of 1986 [formerly I.R.C. 1954]) received after December 31, 1983, if the generally applicable payment date for such portion was before January 1, 1984.”

For provisions directing that if any amendments made by subtitle A or subtitle C of title XI [§§ 1101–1147 and 1171–1177] or title XVIII [§§ 1800–1899A] of Pub. L. 99–514 require an amendment to any plan, such plan amendment shall not be required to be made before the first plan year beginning on or after Jan. 1, 1989, see section 1140 of Pub. L. 99–514, as amended, set out as a note under section 401 of this title.