Significant original issue discount

For purposes of paragraph (1)(C), a debt instrument shall be treated as having significant original issue discount if—

(A) the aggregate amount which would be includible in gross income with respect to such instrument for periods before the close of any accrual period (as defined in section 1272(a)(5)) ending after the date 5 years after the date of issue, exceeds—

(B) the sum of— (i) the aggregate amount of interest to be paid under the instrument before the close of such accrual period, and (ii) the product of the issue price of such instrument (as defined in sections 1273(b) and 1274(a)) and its yield to maturity.

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Significant original issue discount

Official source

For purposes of paragraph (1)(C), a debt instrument shall be treated as having significant original issue discount if—

(A) the aggregate amount which would be includible in gross income with respect to such instrument for periods before the close of any accrual period (as defined in section 1272(a)(5)) ending after the date 5 years after the date of issue, exceeds—

(B) the sum of— (i) the aggregate amount of interest to be paid under the instrument before the close of such accrual period, and (ii) the product of the issue price of such instrument (as defined in sections 1273(b) and 1274(a)) and its yield to maturity.