Example. (a) Under the terms of a trust instrument, the trustee may accumulate the income or make distributions to A and B. The trustee may also invade corpus for the benefit of A and B. The distributable net income of the trust for taxable year 1975 is $10,000. The trust had undistributed net income for taxable year 1973, the first year of the trust, of $5,000, to which a tax of $1,100 was allocable. On May 1, 1975, the trustee distributes $10,000 to A, and on November 29, 1975, he distributes $5,000 to B. Thus, of the total distribution of $15,000, A received two-thirds and B receives one-third.

(b) For the purposes of determining the amounts includible in the beneficiaries' gross income for 1975, the trust is deemed to have made the following distributions:

(c) A will include in his income for 1975 two-thirds of each item shown in paragraph (b) of this example. Thus, he will include in gross income $6,666.67 (10,000/15,000 × $10,000) of the 1975 distributable net income of the trust as provided in section 662(a)(2) (which is not an amount includable in his income under §1.668(a)-1A(a)). He will include in his income $3,333.33 (10,000/15,000 × $5,000) of the accumulation distribution and $733.33 (10,000/15,000 × $1,100) of the taxes imposed on the trust, as provided in section 668(a).

(d) B will include in his income for 1975 one-third of each item shown in paragraph (b) of this example, computed in the manner shown in paragraph (c) of this example.

(e) To the extent the total accumulation distribution consists of undistributed net income and undistributed capital gain, A and B shall be treated as receiving a pro rata share of each for the preceding taxable year 1973.