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Introduction

SECTION 10. UNADJUSTED

Internal Revenue Bulletin 2008-42 · 2026-10-03 edition · updated 2026-10-04 · United States

MORTALITY EXPERIENCE

.01 In General . The information below must be provided in tabular form for all individuals within each population for whom the use of a separate mortality table is requested, for each year of the Experience Study Period, and for the Experience Study Period in its entirety, for all ages between 18 and 100 (except as provided in subsection .03 of this section). The same Experience Study Period must be used to develop the information below as was used to demonstrate credible mortality experience in section 7.

(1) The sum of the accrued benefits (or payable benefits, in the case of individuals in pay status) of all individuals at that age at the beginning of the year, other than individuals who left the population during the year for reasons other than death;

(2) The sum of the accrued (or payable) benefits of all individuals at that age at the beginning of the year who left the population during the year for reasons other than death, adjusted to reflect exposure periods of less than one year;

(3) The sum of the accrued (or payable) benefits of all individuals at that age at the beginning of the year who died during the year;

(4) The quotient determined by dividing the sum of the accrued (or payable) benefits of all individuals at that age who died during the year by the sum of the accrued (or payable) benefits for all individuals at that age adjusted for individuals at that age who left the population for reasons other than death ( i.e., the amount determined in paragraph (3), divided by the total of the amounts determined in paragraphs (1) and (2);

(5) The total number of individuals at that age at the beginning of the year;

(6) The total number of individuals at that age at the beginning of the year who left the population for reasons other than death;

(7) The total number of individuals at that age at the beginning of the year who died during the year; and

(8) The average accrued benefit of all individuals at that age at the beginning of the year.

.02 Adjustment for Exposure Periods of Less than One Year . The request must include a description of the method(s) used

October 20, 2008 941 2008–42 I.R.B.

(2) If the applicable Standard Mortality Table for a population is the table provided in either paragraph (2) or paragraph (4) of subsection 11.06, then the Fixed Percentage must be within two percentage points of the arithmetic average of the ratios of the mortality rates from the Unadjusted Base Mortality Table for the population to the central age mortality rates from the Projected Applicable Standard Mortality Table of each of the five-year age groups from the 55–59 age group to the 80–84 age group, inclusive, unless the applicant can demonstrate that a different set of five-year age groups (consisting of no less than six such groups) is more appropriate for this purpose.

(3) If the applicable Standard Mortality Table for a population is the table provided in either paragraph (5) or paragraph (6) of subsection 11.06, then the Fixed Percentage must be within two percentage points of the arithmetic average of the ratios of the mortality rates from the Unadjusted Base Mortality Table for the population to the central age mortality rates from the Projected Applicable Standard Mortality Table of each of the five-year age groups from the 45–49 age group to the 80–84 age group, inclusive, unless the applicant can demonstrate that a different set of five-year age groups (consisting of no less than eight such groups) is more appropriate for this purpose.

.03 Consistency Requirement . The consistency requirement of this subsection .03 is satisfied only if each of the applicable ratios described in subsection .02 of this section is within 10 percentage points of the Fixed Percentage.

.04 Terminal Age . Notwithstanding subsection .01 of this section, the mortality rate for the terminal age in any Base Table created by applying a Level Percentage to a Standard Mortality Table shall be 1.000.

.05 Other Mortality Tables . The Service will consider requests for the approval of Base Tables constructed through the application of a fixed percentage to the mortality rates of other published generally accepted mortality tables ( e.g., the 1983 Group Annuity Mortality Table) using standards similar to those provided in subsections .01 through .04 of this section.

.06 Example . The age group rates from the Male Unadjusted Base Table (determined in accordance with section 10 of this revenue procedure), the central age rates from the Male Base Combined Mortality

Base Table, then a copy of each intermediate table so created must be provided.

.04 Rationale . The rationale for the selection of each particular graduation method used must be provided along with the rationale for the selection of the particular parameters used as part of the method.

.05 Extension to Extreme Ages . At extreme ages for which insufficient data exists, the Base Tables must be extended to blend into the applicable Standard Mortality Table, provided in subsection .06 of this section, projected to the Base Year using Projection Scale AA, as set forth in the regulations. In such cases, the method (and the rationale for the method) used for the extension must be described.

.06 Standard Mortality Tables . For purposes of this revenue procedure, the following are the Standard Mortality Tables:

(1) The Male Base Nonannuitant Mortality Table (Year 2000) as set forth in § 1.430(h)(3)–1;

(2) The Male Base Annuitant Mortality Table (Year 2000) as set forth in § 1.430(h)(3)–1;

(3) The Female Base Nonannuitant Mortality Table (Year 2000) as set forth in § 1.430(h)(3)–1;

(4) The Female Base Annuitant Mortality Table (Year 2000) as set forth in § 1.430(h)(3)–1;

(5) The Male Base Combined Mortality Table (Year 2000) determined in accordance with subsection .07 of this section; and

(6) The Female Base Combined Mortality Table (Year 2000) determined in accordance with subsection .07 of this section.

.07 Gender-Specific Base (Year 2000) Mortality Combined Tables . For purposes of this revenue procedure, the Male Base Combined Mortality Table (Year 2000) is the table determined through application of the male Weighting Factors for Small Plans (the “Weights”) to the Male Base Nonannuitant and Annuitant Mortality Tables (Year 2000) as set forth in § 1.430(h)(3)–1. Similarly, the Female Base Combined Mortality Table (Year 2000) is the table determined through application of the female Weights to the Female Base Nonannuitant and Annuitant Mortality Tables (Year 2000) as set forth in § 1.430(h)(3)–1.

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