Single fixed rate
(iii) Single fixed rate(A) In general. Interest is payable at a single fixed rate only if the rate appropriately takes into account the length of the interval between payments. Thus, if the interval between payments varies during the term of the debt instrument, the value of the fixed rate on which a payment is based generally must be adjusted to reflect a compounding assumption that is consistent with the length of the interval preceding the payment. See Example 1 in paragraph (f) of this section. (B) Special rule for certain first and final payment intervals. Notwithstanding paragraph (c)(1)(iii)(A) of this section, if a debt instrument provides for payment intervals that are equal in length throughout the term of the instrument, except that the first or final payment interval differs in length from the other payment intervals, the first or final interest payment is considered to be made at a fixed rate if the value of the rate on which the payment is based is adjusted in any reasonable manner to take into account the length of the interval. See Example 2 of paragraph (f) of this section. The rule in this paragraph (c)(1)(iii)(B) also applies if the lengths of both the first and final payment intervals differ from the length of the other payment intervals. (2) Debt instruments subject to contingencies. The determination of whether a debt instrument described in 1.1272-1(c) (a debt instrument providing for an alternative payment schedule (or schedules) upon the occurrence of one or more contingencies) provides for qualified stated interest is made by analyzing each alternative payment schedule (including the stated payment schedule) as if it were the debt instrument's sole payment schedule. Under this analysis, the debt instrument provides for qualified stated interest to the extent of the lowest fixed rate at which qualified stated interest would be payable under any payment schedule. See Example (4) of paragraph (f) of this section. (3) Variable rate debt instrument. In the case of a variable rate debt instrument, qualified stated interest is determined under 1.1275-5(e). (4) Stated interest in excess of qualified stated interest. To the extent that stated interest payable under a debt instrument exceeds qualified stated interest, the excess is included in the debt instrument's stated redemption price at maturity. (5) Short-term obligations. In the case of a debt instrument with a term that is not more than 1 year from the date of issue, no payments of interest are treated as qualified stated interest payments. (6) Business day convention(i) Rule. For purposes of this paragraph (c), if a scheduled payment date for stated interest falls on a Saturday, Sunday, or Federal holiday (within the meaning of 5 U.S.C. 6103) but, under the terms of the debt instrument, the stated interest is payable on the first business day that immediately follows the scheduled payment date, the stated interest is treated as payable on the scheduled payment date, provided no additional interest is payable as a result of the deferral. (ii) Effective/applicability date. Paragraph (c)(6)(i) of this section applies to a debt instrument issued on or after September 13, 2012. A taxpayer, however, may rely on paragraph (c)(6)(i) of this section for a debt instrument issued before that date.