26 CFR § 1.483-4 - Contingent payments.
(a) In general. This section applies to a contract for the sale or exchange of property (the overall contract) if the contract provides for one or more contingent payments and the contract is subject to section 483. This section applies even if the contract provides for adequate stated interest under § 1.483–2. If this section applies to a contract, interest under the contract is generally computed and accounted for using rules similar to those that would apply if the contract were a debt instrument subject to § 1.1275–4(c). Consequently, all noncontingent payments under the overall contract are treated as if made under a separate contract, and interest accruals on this separate contract are computed under rules similar to those contained in § 1.1275–4(c)(3). Each contingent payment under the overall contract is characterized as principal and interest under rules similar to those contained in § 1.1275–4(c)(4). However, any interest, or amount treated as interest, on a contract subject to this section is taken into account by a taxpayer under the taxpayer's regular method of accounting (e.g., an accrual method or the cash receipts and disbursements method).
(ii) Treatment of noncontingent payment as separate contract. Each payment of interest is a contingent payment. Accordingly, under paragraph (a) of this section, for purposes of applying section 483 to the debt instrument, the right to the noncontingent payment of $200,000 is treated as a separate contract. The amount of unstated interest on this separate contract is equal to $43,295, which is the amount by which the payment ($200,000) exceeds the present value of the payment ($156,705), calculated using the test rate of 5 percent, compounded annually. The $200,000 payment is thus treated as consisting of a payment of interest of $43,295 and a payment of principal of $156,705. The interest is includible in A's gross income, and deductible by B, under their respective methods of accounting.
(iii) Treatment of contingent payments. Assume that the amount of the contingent payment that is paid on December 31, 1997, is $20,000. Under paragraph (a) of this section, the $20,000 payment is treated as a payment of principal of $19,231 (the present value, as of the date of sale, of the $20,000 payment, calculated using a test rate equal to 4 percent, compounded annually) and a payment of interest of $769. The $769 interest payment is includible in A's gross income, and deductible by B, in their respective taxable years in which the payment occurs. The amount treated as principal gives B additional basis in the property on December 31, 1997. The remaining contingent payments on the debt instrument are accounted for similarly, using a test rate of 4 percent, compounded annually, for the payments made on December 31, 1998, and December 31, 1999, and a test rate of 5 percent, compounded annually, for the payments made on December 31, 2000, and December 31, 2001.
(ii) Allocation of interest. Section 1274 does not apply to the right to receive the additional shares because the right is not a debt instrument for federal income tax purposes. As a result, the transfer of the 3,000 M voting shares to N is a deferred payment subject to section 483 and a portion of the shares is treated as unstated interest under that section. The amount of interest allocable to the shares is equal to the excess of $300,000 (the fair market value of the shares on December 31, 1999) over $266,699 (the present value of $300,000, determined by discounting the payment at the test rate of 4 percent, compounded annually, from December 31, 1999, to December 31, 1996). As a result, the amount of interest allocable to the payment of the shares is $33,301 ($300,000–$266,699). Both M and N take the interest into account in 1999.