§ 415. Computation of primary insurance amount
For the purposes of this subchapter—
(a)
Primary insurance amount
(1)
(A)
The primary insurance amount of an individual shall (except as otherwise provided in this section) be equal to the sum of—
(i)
90 percent of the individual’s average indexed monthly earnings (determined under subsection (b) of this section) to the extent that such earnings do not exceed the amount established for purposes of this clause by subparagraph (B),
(ii)
32 percent of the individual’s average indexed monthly earnings to the extent that such earnings exceed the amount established for purposes of clause (i) but do not exceed the amount established for purposes of this clause by subparagraph (B), and
(iii)
15 percent of the individual’s average indexed monthly earnings to the extent that such earnings exceed the amount established for purposes of clause (ii),
rounded, if not a multiple of $0.10, to the next lower multiple of $0.10, and thereafter increased as provided in subsection (i) of this section.
(B)
(i)
For individuals who initially become eligible for old-age or disability insurance benefits, or who die (before becoming eligible for such benefits), in the calendar year 1979, the amount established for purposes of clause (i) and (ii) of subparagraph (A) shall be $180 and $1,085, respectively.
(ii)
For individuals who initially become eligible for old-age or disability insurance benefits, or who die (before becoming eligible for such benefits), in any calendar year after 1979, each of the amounts so established shall equal the product of the corresponding amount established with respect to the calendar year 1979 under clause (i) of this subparagraph and the quotient obtained by dividing—
(C)
(i)
No primary insurance amount computed under subparagraph (A) may be less than an amount equal to $11.50 multiplied by the individual’s years of coverage in excess of 10, or the increased amount determined for purposes of this clause under subsection (i) of this section.
(ii)
For purposes of clause (i), the term “years of coverage” with respect to any individual means the number (not exceeding 30) equal to the sum of (I) the number (not exceeding 14 and disregarding any fraction) determined by dividing (a) the total of the wages credited to such individual (including wages deemed to be paid prior to 1951 to such individual under section
417 of this title, compensation under the Railroad Retirement Act of 1937 [45 U.S.C. 228a et seq.] prior to 1951 which is creditable to such individual pursuant to this subchapter, and wages deemed to be paid prior to 1951 to such individual under section
431 of this title) for years after 1936 and before 1951 by (b) $900, plus (II) the number equal to the number of years after 1950 each of which is a computation base year (within the meaning of subsection (b)(2)(B)(ii) of this section) and in each of which he is credited with wages (including wages deemed to be paid to such individual under section
417 of this title, compensation under the Railroad Retirement Act of 1937 or 1974 [45 U.S.C. 228a et seq., 231 et seq.] which is creditable to such individual pursuant to this subchapter, and wages deemed to be paid to such individual under section
429 of this title) and self-employment income of not less than 25 percent (in the case of a year after 1950 and before 1978) of the maximum amount which (pursuant to subsection (e) of this section) may be counted for such year, or 25 percent (in the case of a year after 1977 and before 1991) or 15 percent (in the case of a year after 1990) of the maximum amount which (pursuant to subsection (e) of this section) could be counted for such year if section
430 of this title as in effect immediately prior to December 20, 1977, had remained in effect without change (except that, for purposes of subsection (b) of such section
430 of this title as so in effect, the reference to the contribution and benefit base in paragraph (1) of such subsection (b) shall be deemed a reference to an amount equal to $45,000, each reference in paragraph (2) of such subsection (b) to the average of the wages of all employees as reported to the Secretary of the Treasury shall be deemed a reference to the national average wage index (as defined in section
409
(k)(1) of this title), the reference to a preceding calendar year in paragraph (2)(A) of such subsection (b) shall be deemed a reference to the calendar year before the calendar year in which the determination under subsection (a) of such section
430 of this title is made, and the reference to a calendar year in paragraph (2)(B) of such subsection (b) shall be deemed a reference to 1992).
(D)
In each calendar year the Commissioner of Social Security shall publish in the Federal Register, on or before November 1, the formula for computing benefits under this paragraph and for adjusting wages and self-employment income under subsection (b)(3) of this section in the case of an individual who becomes eligible for an old-age insurance benefit, or (if earlier) becomes eligible for a disability insurance benefit or dies, in the following year, and the national average wage index (as defined in section
409
(k)(1) of this title) on which that formula is based.
(2)
(A)
A year shall not be counted as the year of an individual’s death or eligibility for purposes of this subsection or subsection (i) of this section in any case where such individual was entitled to a disability insurance benefit for any of the 12 months immediately preceding the month of such death or eligibility (but there shall be counted instead the year of the individual’s eligibility for the disability insurance benefit or benefits to which he was entitled during such 12 months).
(B)
In the case of an individual who was entitled to a disability insurance benefit for any of the 12 months before the month in which he became entitled to an old-age insurance benefit, became reentitled to a disability insurance benefit, or died, the primary insurance amount for determining any benefit attributable to that entitlement, reentitlement, or death is the greater of—
(i)
the primary insurance amount upon which such disability insurance benefit was based, increased by the amount of each general benefit increase (as defined in subsection (i)(3) of this section), and each increase provided under subsection (i)(2) of this section, that would have applied to such primary insurance amount had the individual remained entitled to such disability insurance benefit until the month in which he became so entitled or reentitled or died, or
(C)
In the case of an individual who was entitled to a disability insurance benefit for any month, and with respect to whom a primary insurance amount is required to be computed at any time after the close of the period of the individual’s disability (whether because of such individual’s subsequent entitlement to old-age insurance benefits or to a disability insurance benefit based upon a subsequent period of disability, or because of such individual’s death), the primary insurance amount so computed may in no case be less than the primary insurance amount with respect to which such former disability insurance benefit was most recently determined.
(3)
(A)
Paragraph (1) applies only to an individual who was not eligible for an old-age insurance benefit prior to January 1979 and who in that or any succeeding month—
and (except for subparagraph (C)(i) thereof) it applies to every such individual except to the extent otherwise provided by paragraph (4).
(B)
For purposes of this subchapter, an individual is deemed to be eligible—
(i)
for old-age insurance benefits, for months beginning with the month in which he attains age 62, or
(ii)
for disability insurance benefits, for months beginning with the month in which his period of disability began as provided under section
416
(i)(2)(C) of this title,
except as provided in paragraph (2)(A) in cases where fewer than 12 months have elapsed since the termination of a prior period of disability.
(4)
Paragraph (1) (except for subparagraph (C)(i) thereof) does not apply to the computation or recomputation of a primary insurance amount for—
(A)
an individual who was eligible for a disability insurance benefit for a month prior to January 1979 unless, prior to the month in which occurs the event described in clause (i), (ii), or (iii) of paragraph (3)(A), there occurs a period of at least 12 consecutive months for which he was not entitled to a disability insurance benefit, or
(B)
an individual who had wages or self-employment income credited for one or more years prior to 1979, and who was not eligible for an old-age or disability insurance benefit, and did not die, prior to January 1979, if in the year for which the computation or recomputation would be made the individual’s primary insurance amount would be greater if computed or recomputed—
(i)
under this subsection as in effect in December 1978, for purposes of old-age insurance benefits in the case of an individual who becomes eligible for such benefits prior to 1984, or
(ii)
as provided by subsection (d) of this section, in the case of an individual to whom such section applies.
In determining whether an individual’s primary insurance amount would be greater if computed or recomputed as provided in subparagraph (B), (I) the table of benefits in effect in December 1978, as modified by paragraph (6), shall be applied without regard to any increases in that table which may become effective (in accordance with subsection (i)(4) of this section) for years after 1978 (subject to clause (iii) of subsection (i)(2)(A) of this section) and (II) such individual’s average monthly wage shall be computed as provided by subsection (b)(4) of this section.
(5)
(A)
Subject to subparagraphs (B), (C), (D) and (E), for purposes of computing the primary insurance amount (after December 1978) of an individual to whom paragraph (1) does not apply (other than an individual described in paragraph (4)(B)), this section as in effect in December 1978 shall remain in effect, except that, effective for January 1979, the dollar amount specified in paragraph (3) of this subsection shall be increased to $11.50.
(B)
(i)
Subject to clauses (ii), (iii), and (iv), and notwithstanding any other provision of law, the primary insurance amount of any individual described in subparagraph (C) shall be, in lieu of the primary insurance amount as computed pursuant to any of the provisions referred to in subparagraph (D), the primary insurance amount computed under subsection (a) of this section as in effect in December 1978, without regard to subsections (b)(4) and (c) of this section as so in effect.
(ii)
The computation of a primary insurance amount under this subparagraph shall be subject to section 104(j)(2) of the Social Security Amendments of 1972 (relating to the number of elapsed years under subsection (b) of this section).
(iii)
In computing a primary insurance amount under this subparagraph, the dollar amount specified in paragraph (3) of subsection (a) of this section (as in effect in December 1978) shall be increased to $11.50.
(C)
An individual is described in this subparagraph if—
(6)
(A)
In applying the table of benefits in effect in December 1978 under this section for purposes of the last sentence of paragraph (4), such table, revised as provided by subsection (i) of this section, as applicable, shall be extended for average monthly wages of less than $76.00 and primary insurance benefits (as determined under subsection (d) of this section) of less than $16.20.
(7)
(A)
In the case of an individual whose primary insurance amount would be computed under paragraph (1) of this subsection, who—
(i)
attains age 62 after 1985 (except where he or she became entitled to a disability insurance benefit before 1986 and remained so entitled in any of the 12 months immediately preceding his or her attainment of age 62), or
(ii)
would attain age 62 after 1985 and becomes eligible for a disability insurance benefit after 1985,
and who first becomes eligible after 1985 for a monthly periodic payment (including a payment determined under subparagraph (C), but excluding
(I)
a payment under the Railroad Retirement Act of 1974 or 1937 [45 U.S.C. 231 et seq., 228a et seq.],
(II)
a payment by a social security system of a foreign country based on an agreement concluded between the United States and such foreign country pursuant to section
433 of this title, and
(III)
a payment based wholly on service as a member of a uniformed service (as defined in section
410
(m) of this title)) which is based in whole or in part upon his or her earnings for service which did not constitute “employment” as defined in section
410 of this title for purposes of this subchapter (hereafter in this paragraph and in subsection (d)(3) of this section referred to as “noncovered service”), the primary insurance amount of that individual during his or her concurrent entitlement to such monthly periodic payment and to old-age or disability insurance benefits shall be computed or recomputed under subparagraph (B).
(B)
(i)
If paragraph (1) of this subsection would apply to such an individual (except for subparagraph (A) of this paragraph), there shall first be computed an amount equal to the individual’s primary insurance amount under paragraph (1) of this subsection, except that for purposes of such computation the percentage of the individual’s average indexed monthly earnings established by subparagraph (A)(i) of paragraph (1) shall be the percent specified in clause (ii). There shall then be computed (without regard to this paragraph) a second amount, which shall be equal to the individual’s primary insurance amount under paragraph (1) of this subsection, except that such second amount shall be reduced by an amount equal to one-half of the portion of the monthly periodic payment which is attributable to noncovered service performed after 1956 (with such attribution being based on the proportionate number of years of such noncovered service) and to which the individual is entitled (or is deemed to be entitled) for the initial month of his or her concurrent entitlement to such monthly periodic payment and old-age or disability insurance benefits. The individual’s primary insurance amount shall be the larger of the two amounts computed under this subparagraph (before the application of subsection (i) of this section) and shall be deemed to be computed under paragraph (1) of this subsection for the purpose of applying other provisions of this subchapter.
(ii)
For purposes of clause (i), the percent specified in this clause is—
(C)
(i)
Any periodic payment which otherwise meets the requirements of subparagraph (A), but which is paid on other than a monthly basis, shall be allocated on a basis equivalent to a monthly payment (as determined by the Commissioner of Social Security), and such equivalent monthly payment shall constitute a monthly periodic payment for purposes of this paragraph.
(ii)
In the case of an individual who has elected to receive a periodic payment that has been reduced so as to provide a survivor’s benefit to any other individual, the payment shall be deemed to be increased (for purposes of any computation under this paragraph or subsection (d)(3) of this section) by the amount of such reduction.
(D)
This paragraph shall not apply in the case of an individual who has 30 years or more of coverage. In the case of an individual who has more than 20 years of coverage but less than 30 years of coverage (as so defined), the percent specified in the applicable subdivision of subparagraph (B)(ii) shall (if such percent is smaller than the applicable percent specified in the following table) be deemed to be the applicable percent specified in the following table:
If the number of such individual’s
years of coverage (as so
The applicable
defined) is:
percent is:
29
85 percent
28
80 percent
27
75 percent
26
70 percent
25
65 percent
24
60 percent
23
55 percent
22
50 percent
21
45 percent.
For purposes of this subparagraph, the term “year of coverage” shall have the meaning provided in paragraph (1)(C)(ii), except that the reference to “15 percent” therein shall be deemed to be a reference to “25 percent”.
(E)
This paragraph shall not apply in the case of an individual whose eligibility for old-age or disability insurance benefits is based on an agreement concluded pursuant to section
433 of this title or an individual who on January 1, 1984—
(i)
is an employee performing service to which social security coverage is extended on that date solely by reason of the amendments made by section 101 of the Social Security Amendments of 1983; or
(ii)
is an employee of a nonprofit organization which (on December 31, 1983) did not have in effect a waiver certificate under section 3121(k) of the Internal Revenue Code of 1954 and to the employees of which social security coverage is extended on that date solely by reason of the amendments made by section 102 of that Act, unless social security coverage had previously extended to service performed by such individual as an employee of that organization under a waiver certificate which was subsequently (prior to December 31, 1983) terminated.
(b)
Average indexed monthly earnings; average monthly wage
(1)
An individual’s average indexed monthly earnings shall be equal to the quotient obtained by dividing—
(2)
(A)
The number of an individual’s benefit computation years equals the number of elapsed years reduced—
(i)
in the case of an individual who is entitled to old-age insurance benefits (except as provided in the second sentence of this subparagraph), or who has died, by 5 years, and
(ii)
in the case of an individual who is entitled to disability insurance benefits, by the number of years equal to one-fifth of such individual’s elapsed years (disregarding any resulting fractional part of a year), but not by more than 5 years.
Clause (ii), once applicable with respect to any individual, shall continue to apply for purposes of determining such individual’s primary insurance amount for purposes of any subsequent eligibility for disability or old-age insurance benefits unless prior to the month in which such eligibility begins there occurs a period of at least 12 consecutive months for which he was not entitled to a disability or an old-age insurance benefit. If an individual described in clause (ii) is living with a child (of such individual or his or her spouse) under the age of 3 in any calendar year which is included in such individual’s computation base years, but which is not disregarded pursuant to clause (ii) or to subparagraph (B) (in determining such individual’s benefit computation years) by reason of the reduction in the number of such individual’s elapsed years under clause (ii), the number by which such elapsed years are reduced under this subparagraph pursuant to clause (ii) shall be increased by one (up to a combined total not exceeding 3) for each such calendar year; except that
(I)
no calendar year shall be disregarded by reason of this sentence (in determining such individual’s benefit computation years) unless the individual was living with such child substantially throughout the period in which the child was alive and under the age of 3 in such year and the individual had no earnings as described in section
403
(f)(5) of this title in such year,
(II)
the particular calendar years to be disregarded under this sentence (in determining such benefit computation years) shall be those years (not otherwise disregarded under clause (ii)) which, before the application of subsection (f) of this section, meet the conditions of subclause (I), and (III) this sentence shall apply only to the extent that its application would not result in a lower primary insurance amount. The number of an individual’s benefit computation years as determined under this subparagraph shall in no case be less than 2.
(B)
For purposes of this subsection with respect to any individual—
(i)
the term “benefit computation years” means those computation base years, equal in number to the number determined under subparagraph (A), for which the total of such individual’s wages and self-employment income, after adjustment under paragraph (3), is the largest;
(ii)
the term “computation base years” means the calendar years after 1950 and before—
(I)
in the case of an individual entitled to old-age insurance benefits, the year in which occurred (whether by reason of section
402
(j)(1) of this title or otherwise) the first month of that entitlement; or
(II)
in the case of an individual who has died (without having become entitled to old-age insurance benefits), the year succeeding the year of his death;
except that such term excludes any calendar year entirely included in a period of disability; and
(iii)
the term “number of elapsed years” means (except as otherwise provided by section 104(j)(2) of the Social Security Amendments of 1972) the number of calendar years after 1950 (or, if later, the year in which the individual attained age 21) and before the year in which the individual died, or, if it occurred earlier (but after 1960), the year in which he attained age 62; except that such term excludes any calendar year any part of which is included in a period of disability.
(3)
(A)
Except as provided by subparagraph (B), the wages paid in and self-employment income credited to each of an individual’s computation base years for purposes of the selection therefrom of benefit computation years under paragraph (2) shall be deemed to be equal to the product of—
(i)
the wages and self-employment income paid in or credited to such year (as determined without regard to this subparagraph), and
(ii)
the quotient obtained by dividing—
(I)
the national average wage index (as defined in section
409
(k)(1) of this title) for the second calendar year preceding the earliest of the year of the individual’s death, eligibility for an old-age insurance benefit, or eligibility for a disability insurance benefit (except that the year in which the individual dies, or becomes eligible, shall not be considered as such year if the individual was entitled to disability insurance benefits for any month in the 12-month period immediately preceding such death or eligibility, but there shall be counted instead the year of the individual’s eligibility for the disability insurance benefit to which he was entitled in such 12-month period), by
(B)
Wages paid in or self-employment income credited to an individual’s computation base year which—
(ii)
is a year treated under subsection (f)(2)(C) of this section as though it were the last year of the period specified in paragraph (2)(B)(ii),
shall be available for use in determining an individual’s benefit computation years, but without applying subparagraph (A) of this paragraph.
(4)
For purposes of determining the average monthly wage of an individual whose primary insurance amount is computed (after 1978) under subsection (a) or (d) of this section as in effect (except with respect to the table contained therein) in December 1978, by reason of subsection (a)(4)(B) of this section, this subsection as in effect in December 1978 shall remain in effect, except that paragraph (2)(C) (as then in effect) shall be deemed to provide that “computation base years” include only calendar years in the period after 1950 (or 1936, if applicable) and prior to the year in which occurred the first month for which the individual was eligible (as defined in subsection (a)(3)(B) of this section as in effect in January 1979) for an old-age or disability insurance benefit, or, if earlier, the year in which he died. Any calendar year all of which is included in a period of disability shall not be included as a computation base year for such purposes.
(c)
Application of prior provisions in certain cases
Subject to the amendments made by section 5117 of the Omnibus Budget Reconciliation Act of 1990, this subsection as in effect in December 1978 shall remain in effect with respect to an individual to whom subsection (a)(1) of this section does not apply by reason of the individual’s eligibility for an old-age or disability insurance benefit, or the individual’s death, prior to 1979.
(d)
Primary insurance amount under 1939 Act
(1)
For purposes of column I of the table appearing in subsection (a) of this section, as that subsection was in effect in December 1977, an individual’s primary insurance benefit shall be computed as follows:
(A)
The individual’s average monthly wage shall be determined as provided in subsection (b) of this section, as in effect in December 1977 (but without regard to paragraph (4) thereof and subject to section 104(j)(2) of the Social Security Amendments of 1972), except that for purposes of paragraphs (2)(C) and (3) of that subsection (as so in effect) 1936 shall be used instead of 1950.
(B)
For purposes of subparagraphs (B) and (C) of subsection (b)(2) of this section (as so in effect)—
(i)
the total wages prior to 1951 (as defined in subparagraph (C) of this paragraph) of an individual—
(I)
shall, in the case of an individual who attained age 21 prior to 1950, be divided by the number of years (hereinafter in this subparagraph referred to as the “divisor”) elapsing after the year in which the individual attained age 20, or 1936 if later, and prior to the earlier of the year of death or 1951, except that such divisor shall not include any calendar year entirely included in a period of disability, and in no case shall the divisor be less than one, and
(II)
shall, in the case of an individual who died before 1950 and before attaining age 21, be divided by the number of years (hereinafter in this subparagraph referred to as the “divisor”) elapsing after the second year prior to the year of death, or 1936 if later, and prior to the year of death, and in no case shall the divisor be less than one; and
(ii)
the total wages prior to 1951 (as defined in subparagraph (C) of this paragraph) of an individual who either attained age 21 after 1949 or died after 1949 before attaining age 21, shall be divided by the number of years (hereinafter in this subparagraph referred to as the “divisor”) elapsing after 1949 and prior to 1951.
The quotient so obtained shall be deemed to be the individual’s wages credited to each of the years which were used in computing the amount of the divisor, except that—
(iii)
if the quotient exceeds $3,000, only $3,000 shall be deemed to be the individual’s wages for each of the years which were used in computing the amount of the divisor, and the remainder of the individual’s total wages prior to 1951
(I)
if less than $3,000, shall be deemed credited to the computation base year (as defined in subsection (b)(2) of this section as in effect in December 1977) immediately preceding the earliest year used in computing the amount of the divisor, or
(II)
if $3,000 or more, shall be deemed credited, in $3,000 increments, to the computation base year (as so defined) immediately preceding the earliest year used in computing the amount of the divisor and to each of the computation base years (as so defined) consecutively preceding that year, with any remainder less than $3,000 being credited to the computation base year (as so defined) immediately preceding the earliest year to which a full $3,000 increment was credited; and
(C)
For the purposes of subparagraph (B), “total wages prior to 1951” with respect to an individual means the sum of
(i)
remuneration credited to such individual prior to 1951 on the records of the Commissioner of Social Security,
(iii)
compensation under the Railroad Retirement Act of 1937 [45 U.S.C. 228a et seq.] prior to 1951 creditable to him pursuant to this subchapter, and
(D)
The individual’s primary insurance benefit shall be 40 percent of the first $50 of his average monthly wage as computed under this subsection, plus 10 percent of the next $200 of his average monthly wage, increased by 1 percent for each increment year. The number of increment years is the number, not more than 14 nor less than 4, that is equal to the individual’s total wages prior to 1951 divided by $1,650 (disregarding any fraction).
(2)
The provisions of this subsection shall be applicable only in the case of an individual—
(A)
with respect to whom at least one of the quarters elapsing prior to 1951 is a quarter of coverage;
(3)
In the case of an individual whose primary insurance amount is not computed under paragraph (1) of subsection (a) of this section by reason of paragraph (4)(B)(ii) of that subsection, who—
(A)
attains age 62 after 1985 (except where he or she became entitled to a disability insurance benefit before 1986, and remained so entitled in any of the 12 months immediately preceding his or her attainment of age 62), or
(B)
would attain age 62 after 1985 and becomes eligible for a disability insurance benefit after 1985,
and who first becomes eligible after 1985 for a monthly periodic payment (including a payment determined under subsection (a)(7)(C) of this section, but excluding
(I)
a payment under the Railroad Retirement Act of 1974 or 1937 [45 U.S.C. 231 et seq., 228a et seq.],
(II)
a payment by a social security system of a foreign country based on an agreement concluded between the United States and such foreign country pursuant to section
433 of this title, and
(III)
a payment based wholly on service as a member of a uniformed service (as defined in section
410
(m) of this title)) which is based (in whole or in part) upon his or her earnings in noncovered service, the primary insurance amount of such individual during his or her concurrent entitlement to such monthly periodic payment and to old-age or disability insurance benefits shall be the primary insurance amount computed or recomputed under this subsection (without regard to this paragraph and before the application of subsection (i) of this section) reduced by an amount equal to the smaller of—
(i)
one-half of the primary insurance amount (computed without regard to this paragraph and before the application of subsection (i) of this section), or
(ii)
one-half of the portion of the monthly periodic payment (or payment determined under subsection (a)(7)(C) of this section) which is attributable to noncovered service performed after 1956 (with such attribution being based on the proportionate number of years of such noncovered service) and to which that individual is entitled (or is deemed to be entitled) for the initial month of such concurrent entitlement.
This paragraph shall not apply in the case of any individual to whom subsection (a)(7) of this section would not apply by reason of subparagraph (E) or the first sentence of subparagraph (D) thereof.
(e)
Certain wages and self-employment income not to be counted
For the purposes of subsections (b) and (d) of this section—
(1)
in computing an individual’s average indexed monthly earnings or, in the case of an individual whose primary insurance amount is computed under subsection (a) of this section as in effect prior to January 1979, average monthly wage, there shall not be counted the excess over $3,600 in the case of any calendar year after 1950 and before 1955, the excess over $4,200 in the case of any calendar year after 1954 and before 1959, the excess over $4,800 in the case of any calendar year after 1958 and before 1966, the excess over $6,600 in the case of any calendar year after 1965 and before 1968, the excess over $7,800 in the case of any calendar year after 1967 and before 1972, the excess over $9,000 in the case of any calendar year after 1971 and before 1973, the excess over $10,800 in the case of any calendar year after 1972 and before 1974, the excess over $13,200 in the case of any calendar year after 1973 and before 1975, and the excess over an amount equal to the contribution and benefit base (as determined under section
430 of this title) in the case of any calendar year after 1974 with respect to which such contribution and benefit base is effective, (before the application, in the case of average indexed monthly earnings, of subsection (b)(3)(A) of this section) of
(B)
the self-employment income credited to such year (as determined under section
412 of this title); and
(2)
if an individual’s average indexed monthly earnings or, in the case of an individual whose primary insurance amount is computed under subsection (a) of this section as in effect prior to January 1979, average monthly wage, computed under subsection (b) of this section or for the purposes of subsection (d) of this section is not a multiple of $1, it shall be reduced to the next lower multiple of $1.
(f)
Recomputation of benefits
(1)
After an individual’s primary insurance amount has been determined under this section, there shall be no recomputation of such individual’s primary insurance amount except as provided in this subsection or, in the case of a World War II veteran who died prior to July 27, 1954, as provided in section
417
(b) of this title.
(2)
(A)
If an individual has wages or self-employment income for a year after 1978 for any part of which he is entitled to old-age or disability insurance benefits, the Commissioner of Social Security shall, at such time or times and within such period as the Commissioner may by regulation prescribe, recompute the individual’s primary insurance amount for that year.
(B)
For the purpose of applying subparagraph (A) of subsection (a)(1) of this section to the average indexed monthly earnings of an individual to whom that subsection applies and who receives a recomputation under this paragraph, there shall be used, in lieu of the amounts established by subsection (a)(1)(B) of this section for purposes of clauses (i) and (ii) of subsection (a)(1)(A) of this section, the amounts so established that were (or, in the case of an individual described in subsection (a)(4)(B) of this section, would have been) used in the computation of such individual’s primary insurance amount prior to the application of this subsection.
(C)
A recomputation of any individual’s primary insurance amount under this paragraph shall be made as provided in subsection (a)(1) of this section as though the year with respect to which it is made is the last year of the period specified in subsection (b)(2)(B)(ii) of this section; and subsection (b)(3)(A) of this section shall apply with respect to any such recomputation as it applied in the computation of such individual’s primary insurance amount prior to the application of this subsection.