Example. D created an inter vivos trust during 1994 with certain income producing assets valued at $1,000,000. The trust provides that all income is payable to D's wife, S, for S's life, with the remainder at S's death to be divided equally among their four children. In computing taxable gifts during calendar year 1994, D deducted, pursuant to section 2523(f), $1,000,000 from the total amount of gifts made. In addition, assume that S received no other transfers from D and that S made a gift during 1996 of the entire life interest to one of the children, at which time the value of trust assets was $1,080,000 and the value of S's life interest was $400,000. Although the entire value of the trust assets ($1,080,000) is, pursuant to sections 2511 and 2519, included in the total amount of S's gifts for calendar year 1996, S is only entitled to reimbursement for the Federal gift tax attributable to the value of the remainder interest, that is, the Federal gift tax attributable to $680,000 ($1,080,000 less $400,000). The Federal gift tax attributable to $680,000 is equal to the amount by which the total Federal gift tax (including penalties and interest) paid for the calendar year exceeds the federal gift tax (including penalties and interest) that would have been paid if the total amount of gifts during 1996 had been reduced by $680,000. That amount of tax may be recovered by S from the trust.
26 C.F.R. §25.2207A-1