Example. The decedent, who dies in 2000, leaves his residuary estate, after the payment of debts, expenses, and estate taxes, to a charitable remainder unitrust that satisfies the requirements of section 664(d). During the period of administration, the estate incurs estate transmission expenses of $400,000. The residue of the estate (the charitable share) must be reduced by the $400,000 of transmission expenses and by the Federal and State estate taxes before the present value of the remainder interest passing to charity can be determined in accordance with the provisions of § 1.664-4 of this chapter. Because the estate taxes are payable out of the residue, the computation of the estate taxes and the allowable charitable deduction are interrelated. See paragraph (a)(2) of this section.
26 C.F.R. §20.2055-3