The Social Security Act, referred to in subsec. (b)(1)(G), is act Aug. 14, 1935, ch. 531, 49 Stat. 620. Title II of the Social Security Act is classified generally to subchapter II (§ 401 et seq.) of chapter 7 of Title 42, The Public Health and Welfare. For complete classification of this Act to the Code, see section 1305 of Title 42 and Tables.

2022—Subsec. (b)(6). Pub. L. 117–328 added par. (6).

2014—Subsec. (i)(3). Pub. L. 113–97 substituted “multiemployer plans or CSEC plans” for “multiemployer plans”.

Subsecs. (k), (l). Pub. L. 113–235 added subsec. (k) and redesignated former subsec. (k) as (l).

2008—Subsec. (b)(5)(A)(iii). Pub. L. 110–458, § 107(a)(2)(A), substituted “subparagraph” for “clause”.

Subsec. (b)(5)(B)(i)(II). Pub. L. 110–458, § 107(a)(3), amended subcl. (II) generally. Prior to amendment, text read as follows: “An interest credit (or an equivalent amount) of less than zero shall in no event result in the account balance or similar amount being less than the aggregate amount of contributions credited to the account.”

Subsec. (b)(5)(C). Pub. L. 110–458, § 107(a)(2)(B), inserted “otherwise” before “allowable”.

2006—Subsec. (b)(5). Pub. L. 109–280, § 701(a)(1), added par. (5).

Subsec. (g)(1). Pub. L. 109–280, § 108(a)(5), formerly § 107(a)(5), as renumbered by Pub. L. 111–192, substituted “1082(d)(2)” for “1082(c)(8)”.

Subsec. (h)(1). Pub. L. 109–280, § 502(c)(1), inserted before period at end “and to each employer who has an obligation to contribute to the plan”.

Subsec. (i)(2)(B). Pub. L. 109–280, § 108(a)(6), formerly § 107(a)(6), as renumbered by Pub. L. 111–192, substituted “1082(d)(2)” for “1082(c)(8)”.

Subsec. (i)(3). Pub. L. 109–280, § 108(a)(7), formerly § 107(a)(7), as renumbered by Pub. L. 111–192, substituted “funding target attainment percentage (as defined in section 1083(d)(2) of this title)” for “funded current liability percentage (within the meaning of section 1082(d)(8) of this title)”.

Subsec. (i)(4). Pub. L. 109–280, § 108(a)(8), formerly § 107(a)(8), as renumbered by Pub. L. 111–192, substituted “section 1082(b)(1) of this title, without regard to section 1082(b)(2) of this title” for “section 1082(c)(11)(A) of this title, without regard to section 1082(c)(11)(B) of this title”.

Subsecs. (j), (k). Pub. L. 109–280, § 901(b)(1), added subsec. (j) and redesignated former subsec. (j) as (k).

2002—Subsec. (h)(9). Pub. L. 107–147 struck out “significantly” before “reduces” and before “reducing”.

2001—Subsec. (g)(2). Pub. L. 107–16, § 645(b)(2), inserted after second sentence “The Secretary of the Treasury shall by regulations provide that this paragraph shall not apply to any plan amendment which reduces or eliminates benefits or subsidies which create significant burdens or complexities for the plan and plan participants, unless such amendment adversely affects the rights of any participant in a more than de minimis manner.”

Subsec. (g)(4), (5). Pub. L. 107–16, § 645(a)(2), added pars. (4) and (5).

Subsec. (h). Pub. L. 107–16, § 659(b), amended subsec. (h) generally. Prior to amendment, subsec. (h) read as follows:

“(1) A plan described in paragraph (2) may not be amended so as to provide for a significant reduction in the rate of future benefit accrual, unless, after adoption of the plan amendment and not less than 15 days before the effective date of the plan amendment, the plan administrator provides a written notice, setting forth the plan amendment and its effective date, to—

“(A) each participant in the plan,

“(B) each beneficiary who is an alternate payee (within the meaning of section 1056(d)(3)(K) of this title) under an applicable qualified domestic relations order (within the meaning of section 1056(d)(3)(B)(i) of this title), and

“(C) each employee organization representing participants in the plan,

except that such notice shall instead be provided to a person designated, in writing, to receive such notice on behalf of any person referred to in subparagraph (A), (B), or (C).

“(2) A plan is described in this paragraph if such plan is—

“(A) a defined benefit plan, or

“(B) an individual account plan which is subject to the funding standards of section 1082 of this title.”

1997—Subsec. (d)(1). Pub. L. 105–34 substituted “the dollar limit under section 1053(e)(1) of this title” for “$3,500”.

1994—Subsecs. (i), (j). Pub. L. 103–465 added subsec. (i) and redesignated former subsec. (i) as (j).

1989—Subsec. (b)(1)(A). Pub. L. 101–239, § 7894(c)(4), substituted “subparagraph” for “suparagraph” in last sentence.

Subsec. (b)(1)(E). Pub. L. 101–239, § 7894(c)(5), substituted “term ‘year of service’ ” for “term ‘years of service’ ”.

Subsec. (b)(2)(B). Pub. L. 101–239, § 7871(a)(1), redesignated subpar. (C) as (B) and struck out former subpar. (B) which read as follows: “Subparagraph (A) shall not apply with respect to any employee who is a highly compensated employee (within the meaning of section 414(q) of title 26) to the extent provided in regulations prescribed by the Secretary of the Treasury for purposes of precluding discrimination in favor of highly compensated employees within the meaning of subchapter D of chapter 1 of title 26.”

Subsec. (b)(2)(C). Pub. L. 101–239, § 7871(a)(3), substituted “subparagraphs (B) and (C)” for “subparagraphs (C) and (D)”.

Pub. L. 101–239, § 7871(a)(1), redesignated subpar. (D) as (C). Former subpar. (C) redesignated (B).

Subsec. (b)(2)(D). Pub. L. 101–239, § 7871(a)(1), redesignated subpar. (D) as (C).

Subsec. (c)(2)(B). Pub. L. 101–239, § 7881(m)(2)(B), inserted heading and amended text generally. Prior to amendment, text read as follows:

“(i) In the case of a defined benefit plan providing an annual benefit in the form of a single life annuity (without ancillary benefits) commencing at normal retirement age, the accrued benefit derived from contributions made by an employee as of any applicable date is the annual benefit equal to the employee’s accumulated contributions multiplied by the appropriate conversion factor.

“(ii) For purposes of clause (i), the term ‘appropriate conversion factor’ means the factor necessary to convert an amount equal to the accumulated contributions to a single life annuity (without ancillary benefits) commencing at normal retirement age and shall be 10 percent for a normal retirement age of 65 years. For other normal retirement ages the conversion factor shall be determined in accordance with regulations prescribed by the Secretary of the Treasury or his delegate.”

Subsec. (c)(2)(C)(iii). Pub. L. 101–239, § 7881(m)(2)(A), amended cl. (iii) generally. Prior to amendment, cl. (iii) read as follows: “interest on the sum of the amounts determined under clauses (i) and (ii) compounded annually at the rate of 120 percent of the Federal mid-term rate (as in effect under section 1274 of title 26 for the 1st month of a plan year) from the beginning of the first plan year to which section 1053(a)(2) of this title applies (by reason of the applicable effective date) to the date upon which the employee would attain normal retirement age.”

Subsec. (c)(2)(E). Pub. L. 101–239, § 7881(m)(2)(C), struck out subpar. (E) which read as follows: “The accrued benefit derived from employee contributions shall not exceed the greater of—

“(i) the employee’s accrued benefit under the plan, or

“(ii) the accrued benefit derived from employee contributions determined as though the amounts calculated under clauses (ii) and (iii) of subparagraph (C) were zero.”

Subsec. (d). Pub. L. 101–239, § 7894(c)(6), removed the indentation of the term “Paragraph” where first appearing in concluding provisions.

Subsec. (g)(3)(A). Pub. L. 101–239, § 7891(a)(1), substituted “Internal Revenue Code of 1986” for “Internal Revenue Code of 1954”, which for purposes of codification was translated as “title 26” thus requiring no change in text.

Subsec. (h). Pub. L. 101–239, § 7862(b)(1)(A), made technical correction to directory language of Pub. L. 99–514, § 1879(u)(1), see 1986 Amendment note below.

Subsec. (h)(2). Pub. L. 101–239, § 7862(b)(2), adjusted left-hand margin of introductory provisions to full measure.

1987—Subsec. (c)(2)(C)(iii). Pub. L. 100–203, § 9346(a)(1), substituted “120 percent of the Federal mid-term rate (as in effect under section 1274 of title 26 for the 1st month of a plan year)” for “5 percent per annum”.

Subsec. (c)(2)(D). Pub. L. 100–203, § 9346(a)(2), struck out “, the rate of interest described in clause (iii) of subparagraph (C), or both,” before “from time to time” in first sentence and struck out second sentence which read as follows: “The rate of interest shall bear the relationship to 5 percent which the Secretary of the Treasury determines to be comparable to the relationship which the long-term money rates and investment yields for the last period of 10 calendar years ending at least 12 months before the beginning of the plan year bear to the long-term money rates and investment yields for the 10-calendar year period 1964 through 1973.”

1986—Subsec. (a). Pub. L. 99–509, § 9202(a)(1), amended subsec. (a) generally. Prior to amendment, subsec. (a) read as follows: “Each pension plan shall satisfy the requirements of subsection (b)(2), and in the case of a defined benefit plan shall also satisfy the requirements of subsection (b)(1).”

Subsec. (b)(1)(H). Pub. L. 99–509, § 9202(a)(2), added subpar. (H).

Subsec. (b)(2) to (4). Pub. L. 99–509, § 9202(a)(3), added par. (2) and redesignated former pars. (2) and (3) as (3) and (4), respectively.

Subsec. (e). Pub. L. 99–514, § 1898(a)(4)(B)(ii), inserted last sentence and struck out former last sentence which read as follows: “In the case of a defined contribution plan, the plan provision required under this subsection may provide that such repayment must be made before the participant has 5 consecutive 1-year breaks in service commencing after such withdrawal”.

Subsec. (g)(1). Pub. L. 99–514, § 1898(f)(2), inserted reference to section 1441.

Subsec. (g)(3). Pub. L. 99–514, § 1898(f)(1)(B), added par. (3).

Subsec. (h). Pub. L. 99–514, § 1879(u)(1), as amended by Pub. L. 101–239, § 7862(b)(1)(A), designated existing provisions as par. (1), substituted “plan described in paragraph (2)” for “single-employer plan”, redesignated former pars. (1) to (3) as subpars. (A) to (C), respectively, substituted “subparagraph (A), (B), or (C)” for “paragraph (1), (2), or (3)” in concluding provisions, and added par. (2).

Pub. L. 99–272 added subsec. (h). Former subsec. (h) redesignated (i).

Subsec. (i). Pub. L. 99–514, § 1113(e)(4)(B), amended subsec. (i) generally, striking out reference to class year plans under section 1053(c)(3) of this title.

Pub. L. 99–272 redesignated former subsec. (h) as (i).

1984—Subsec. (b)(3)(A). Pub. L. 98–397, § 102(e)(3), inserted “, determined without regard to section 1052(b)(5) of this title” after “section 1052(b) of this title”.

Subsec. (d)(1). Pub. L. 98–397, § 105(b), substituted “$3,500” for “$1,750”.

Subsec. (e). Pub. L. 98–397, § 102(f), substituted “5 consecutive 1-year breaks in service” for “any 1-year break in service”.

Subsec. (g). Pub. L. 98–397, § 301(a)(2), designated existing provisions as par. (1) and added par. (2).

Amendment by Pub. L. 117–328 applicable with respect to plan years beginning after Dec. 29, 2022, see section 348(c) of Pub. L. 117–328, set out as a note under section 411 of Title 26, Internal Revenue Code.

Amendment by Pub. L. 113–235 applicable to all periods before, on, and after Dec. 16, 2014, see section 2(c) of div. P of Pub. L. 113–235, set out as a note under section 411 of Title 26, Internal Revenue Code.

Amendment by Pub. L. 113–97 applicable to years beginning after Dec. 31, 2013, see section 3 of Pub. L. 113–97, set out as a note under section 401 of Title 26, Internal Revenue Code.

Amendment by Pub. L. 110–458 effective as if included in the provisions of Pub. L. 109–280 to which the amendment relates, except as otherwise provided, see section 112 of Pub. L. 110–458, set out as a note under section 72 of Title 26, Internal Revenue Code.

Amendment by section 108(a)(5) to (8) of Pub. L. 109–280 applicable to plan years beginning after 2007, see section 108(e) of Pub. L. 109–280, set out as a note under section 1021 of this title.

Amendment by section 502(c)(1) of Pub. L. 109–280 applicable to plan years beginning after Dec. 31, 2007, see section 502(d) of Pub. L. 109–280, set out as a note under section 4980F of Title 26, Internal Revenue Code.

Amendment by section 701(a)(1) of Pub. L. 109–280 applicable to periods beginning on or after June 29, 2005, with provisions relating to vesting and interest credit requirements for plans in existence on June 29, 2005, special rule for collectively bargained plans, and provisions relating to conversions of plan amendments adopted after, and taking effect after, June 29, 2005, see section 701(e) of Pub. L. 109–280, set out as a note under section 411 of Title 26, Internal Revenue Code.

Amendment by section 901(b)(1) of Pub. L. 109–280 applicable to plan years beginning after Dec. 31, 2006, with special rules for collectively bargained agreements and certain employer securities held in an ESOP, see section 901(c) of Pub. L. 109–280, set out as a note under section 401 of Title 26, Internal Revenue Code.

Amendment by 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 411(x) of Pub. L. 107–147, set out as a note under section 25B of Title 26, Internal Revenue Code.

Amendment by section 645(a)(2) of Pub. L. 107–16 applicable to years beginning after Dec. 31, 2001, see section 645(a)(3) of Pub. L. 107–16, set out as a note under section 411 of Title 26, Internal Revenue Code.

Amendment by section 659(b) of Pub. L. 107–16 applicable to plan amendments taking effect on or after June 7, 2001, with transition provisions and special notice rule, see section 659(c) of Pub. L. 107–16, set out as an Effective Date note under section 4980F of Title 26, Internal Revenue Code.

Amendment by Pub. L. 105–34 applicable to plan years beginning after Aug. 5, 1997, see section 1071(c) of Pub. L. 105–34, set out as a note under section 411 of Title 26, Internal Revenue Code.

Amendment by Pub. L. 103–465 applicable to plan amendments adopted on or after Dec. 8, 1994, see section 766(d) of Pub. L. 103–465, set out as a note under section 401 of Title 26, Internal Revenue Code.

Amendment by section 7862(b)(1)(A), (2) of Pub. L. 101–239 effective as if included in the provision of the Tax Reform Act of 1986, Pub. L. 99–514, to which such amendment relates, see section 7863 of Pub. L. 101–239, set out as a note under section 106 of Title 26, Internal Revenue Code.

Amendment by section 7871(a)(1), (3) of Pub. L. 101–239 effective as if included in the amendments made by section 9202 of the Omnibus Budget Reconciliation Act of 1986, Pub. L. 99–509, see section 7871(a)(4) of Pub. L. 101–239, set out as a note under section 411 of Title 26.

Amendment by section 7881(m)(2)(A)–(C) of Pub. L. 101–239 effective, except as otherwise provided, as if included in the provision of the Pension Protection Act, Pub. L. 100–203, §§ 9302–9346, to which such amendment relates, see section 7882 of Pub. L. 101–239, set out as a note under section 401 of Title 26.

Amendment by section 7891(a)(1) of Pub. L. 101–239 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 7891(f) of Pub. L. 101–239, set out as a note under section 1002 of this title.

Amendment by section 7894(c)(4)–(6) of Pub. L. 101–239 effective, except as otherwise provided, as if originally included in the provision of the Employee Retirement Income Security Act of 1974, Pub. L. 93–406, to which such amendment relates, see section 7894(i) of Pub. L. 101–239, set out as a note under section 1002 of this title.

Pub. L. 100–203, title IX, § 9346(c), Dec. 22, 1987, 101 Stat. 1330–374, provided that:

Amendment by section 1113(e)(4)(B) of Pub. L. 99–514 applicable to plan years beginning after Dec. 31, 1988, with special rule for plans maintained pursuant to collective bargaining agreements ratified before Mar. 1, 1986, and not applicable to employees who do not have 1 hour of service in any plan year to which the amendment applies, see section 1113(f) of Pub. L. 99–514, as amended, set out as a note under section 411 of Title 26, Internal Revenue Code.

Pub. L. 99–514, title XVIII, § 1879(u)(5), formerly § 1879(u)(4), Oct. 22, 1986, 100 Stat. 2913, as redesignated and amended by Pub. L. 101–239, title VII, § 7862(b)(1)(A), (B), Dec. 19, 1989, 103 Stat. 2432, provided that:

Amendment by section 1898(a)(4)(B)(ii), (f)(1)(B), (2) of Pub. L. 99–514 effective as if included in the provision of the Retirement Equity Act of 1984, Pub. L. 98–397, to which such amendment relates, except as otherwise provided, see section 1898(j) of Pub. L. 99–514, set out as a note under section 401 of this title.

Amendment by Pub. L. 99–509 applicable only with respect to plan years beginning on or after Jan. 1, 1988, and only to employees who have 1 hour of service in any plan year to which amendment applies, with special rule for collectively bargained plans, see section 9204 of Pub. L. 99–509, set out as an Effective and Termination Dates of 1986 Amendments note under section 623 of this title.

Pub. L. 99–272, title XI, § 11006(b), Apr. 7, 1986, 100 Stat. 243, provided that: “The amendments made by subsection (a) [amending this section] shall apply with respect to plan amendments adopted on or after January 1, 1986, except that, in the case of plan amendments adopted on or after January 1, 1986, and on or before the date of the enactment of this Act [Apr. 7, 1986], the requirements of section 204(h) of the Employee Retirement Income Security Act of 1974 [subsec. (h) of this section] (as added by this section) shall be treated as met if the written notice required under such section 204(h) is provided before 60 days after the date of the enactment of this Act.”

Amendment by sections 102(e)(3), (f), and 105(b) of Pub. L. 98–397 applicable to plan years beginning after Dec. 31, 1984, except as otherwise provided, see sections 302 and 303 of Pub. L. 98–397, set out as a note under section 1001 of this title.

Amendment by section 301(a)(2) of Pub. L. 98–397 not applicable to the termination of a certain defined benefit plan, see section 303(f) of Pub. L. 98–397.

Secretary of Labor, Secretary of the Treasury, and Equal Employment Opportunity Commission each to issue before Feb. 1, 1988, final regulations to carry out amendments made by Pub. L. 99–509, see section 9204 of Pub. L. 99–509, set out as an Effective and Termination Dates of 1986 Amendment note under section 623 of this title.

Secretary authorized, effective Sept. 2, 1974, to promulgate regulations wherever provisions of this subchapter call for the promulgation of regulations, see section 1031 of this title.

For special rules on applicability of amendments by subtitles A (§§ 101–108) and B (§§ 111–116) of title I of Pub. L. 109–280 to certain eligible cooperative plans, PBGC settlement plans, and eligible government contractor plans, see sections 104, 105, and 106 of Pub. L. 109–280, set out as notes under section 401 of Title 26, Internal Revenue Code.

Pub. L. 101–239, title VII, § 7881(m)(3), Dec. 19, 1989, 103 Stat. 2444, provided that: