Mortality component.

(2) Mortality component. The mortality component reflects the mortality data in the most recently available decennial mortality report based on the United States census. As the appropriate new decennial mortality report becomes available after each decennial census, the Treasury Department and the IRS will revise the mortality component described in this section and will update the regulations to adopt the revised mortality component tables. For decedents' estates with valuation dates on or after June 1, 2023, the mortality component table (Table 2010CM) is in 20.2031-7(d)(7)(ii) and is referenced by IRS Publication 1457, Actuarial Valuations Version 4A, and can be found on the IRS website at https://www.irs.gov/retirement-plans/actuarial-tables (or a corresponding URL as may be updated from time to time). See 20.2031-7A for mortality component tables applicable to decedents' estates with valuation dates before June 1, 2023.

Source

26 CFR § 20.7520-1

Scoping language

General actuarial valuations.
(1) Except as otherwise provided in this section and in § 20.7520-3 (relating to exceptions to the use of prescribed tables under certain circumstances), in the case of estates of decedents with valuation dates after April 30, 1989, the fair market value of annuities, interests for life or a term of years (including unitrust interests), and remainder or reversionary interests is their present value determined under this section. See § 20.2031-7(d) (and, for periods prior to June 1, 2023, § 20.2031-7A) for the computation of the value of annuities, interests for life or a term of years, and remainder or reversionary interests, other than interests described in paragraphs (a)(2) and (3) of this section.
(2) For a transfer to a pooled income fund, see § 1.642(c)-6(e) of this chapter (or, for periods prior to June 1, 2023, § 1.642(c)-6A of this chapter) with respect to the valuation of the remainder interest.
(3) In the case of a transfer to a charitable remainder annuity trust with a valuation date after April 30, 1989, see § 1.664-2 of this chapter with respect to the valuation of the remainder interest. See § 1.664-4 of this chapter with respect to the valuation of the remainder interest in property transferred to a charitable remainder unitrust.