§ 448. Limitation on use of cash method of accounting
(a) General rule
Except as otherwise provided in this section, in the case of a—
(1) C corporation,
(2) partnership which has a C corporation as a partner, or
(3) tax shelter,
taxable income shall not be computed under the cash receipts and disbursements method of accounting.
(b) Exceptions
(1) Farming business
Paragraphs (1) and (2) of subsection (a) shall not apply to any farming business.
(2) Qualified personal service corporations
Paragraphs (1) and (2) of subsection (a) shall not apply to a qualified personal service corporation, and such a corporation shall be treated as an individual for purposes of determining whether paragraph (2) of subsection (a) applies to any partnership.
(3) Entities with gross receipts of not more than $5,000,000
Paragraphs (1) and (2) of subsection (a) shall not apply to any corporation or partnership for any taxable year if, for all prior taxable years beginning after December 31, 1985, such entity (or any predecessor) met the $5,000,000 gross receipts test of subsection (c).