§ 441.
(b)
Taxable year
For purposes of this subtitle, the term “taxable year” means—
(1)
the taxpayer’s annual accounting period, if it is a calendar year or a fiscal year;
(2)
the calendar year, if subsection (g) applies;
(3)
the period for which the return is made, if a return is made for a period of less than 12 months; or
(4)
in the case of a DISC filing a return for a period of at least 12 months, the period determined under subsection (h).
(f)
Election of year consisting of 52–53 weeks
(1)
General rule
A taxpayer who, in keeping his books, regularly computes his income on the basis of an annual period which varies from 52 to 53 weeks and ends always on the same day of the week and ends always—
(A)
on whatever date such same day of the week last occurs in a calendar month, or
(B)
on whatever date such same day of the week falls which is nearest to the last day of a calendar month,
may (in accordance with the regulations prescribed under paragraph (3)) elect to compute his taxable income for purposes of this subtitle on the basis of such annual period. This paragraph shall apply to taxable years ending after the date of the enactment of this title.
(2)
Special rules for 52–53-week year
(A)
Effective dates
In any case in which the effective date or the applicability of any provision of this title is expressed in terms of taxable years beginning, including, or ending with reference to a specified date which is the first or last day of a month, a taxable year described in paragraph (1) shall (except for purposes of the computation under section 15) be treated—
(i)
as beginning with the first day of the calendar month beginning nearest to the first day of such taxable year, or
(ii)
as ending with the last day of the calendar month ending nearest to the last day of such taxable year,
(B)
Change in accounting period
In the case of a change from or to a taxable year described in paragraph (1)—
(i)
if such change results in a short period (within the meaning of section 443) of 359 days or more, or of less than 7 days, section 443(b) (relating to alternative tax computation) shall not apply;
(ii)
if such change results in a short period of less than 7 days, such short period shall, for purposes of this subtitle, be added to and deemed a part of the following taxable year; and
(iii)
if such change results in a short period to which subsection (b) of section 443 applies, the taxable income for such short period shall be placed on an annual basis for purposes of such subsection by multiplying the gross income for such short period (minus the deductions allowed by this chapter for the short period, but only the adjusted amount of the deductions for personal exemptions as described in section 443(c)) by 365, by dividing the result by the number of days in the short period, and the tax shall be the same part of the tax computed on the annual basis as the number of days in the short period is of 365 days.
(3)
Special rule for partnerships, S corporations, and personal service corporations
(g)
No books kept; no accounting period
Except as provided in section 443 (relating to returns for periods of less than 12 months), the taxpayer’s taxable year shall be the calendar year if—
(1)
the taxpayer keeps no books;
(2)
the taxpayer does not have an annual accounting period; or
(3)
the taxpayer has an annual accounting period, but such period does not qualify as a fiscal year.
(i)
Taxable year of personal service corporations
(2)
Personal service corporation
For purposes of this subsection, the term “personal service corporation” has the meaning given such term by section 269A(b)(1), except that section 269A(b)(2) shall be applied—
(A)
by substituting “any” for “more than 10 percent”, and
(B)
by substituting “any” for “50 percent or more in value” in section 318(a)(2)(C).
A corporation shall not be treated as a personal service corporation unless more than 10 percent of the stock (by value) in such corporation is held by employee-owners (within the meaning of section 269A(b)(2), as modified by the preceding sentence). If a corporation is a member of an affiliated group filing a consolidated return, all members of such group shall be taken into account in determining whether such corporation is a personal service corporation.
([Aug. 16, 1954, ch. 736], [68A Stat. 148]; [Pub. L. 88–272, title II, § 235(c)(3)], Feb. 26, 1964, [78 Stat. 127]; [Pub. L. 94–455, title XIX, § 1906(b)(13)(A)], Oct. 4, 1976, [90 Stat. 1834]; [Pub. L. 95–30, title I, § 102(b)(5)], May 23, 1977, [91 Stat. 137]; [Pub. L. 98–369, div. A, title IV, § 474(b)(2)], title VIII, § 803, July 18, 1984, [98 Stat. 830], 1000; [Pub. L. 99–514, title I, § 104(b)(6)], title VIII, § 806(c)(1), (d), Oct. 22, 1986, [100 Stat. 2105], 2364; [Pub. L. 100–647, title I, § 1008(e)(4)], Nov. 10, 1988, [102 Stat. 3440]; [Pub. L. 110–172, § 11(g)(7)], Dec. 29, 2007, [121 Stat. 2490].)