(b) Measuring period for the additional increase—(1) To compute the additional increase for all individuals and for maximum benefits payable to a family, we begin with the year in which the insured individual became eligible for old-age or disability benefits to which he or she is currently entitled, or died before becoming eligible.
(c) Compounded percentage benefit increase. To compute the additional cost-of-living increase, we must first compute the compounded percentage benefit increase (CPBI) for both the cost-of-living increases that were actually paid during the measuring period and for the increases that would have been paid if the CPI had been the basis for all the increases.
(2) Multiply the resulting amount for the first year by that for the second year, then multiply that product by the amount for the third year, and continue until the last amount has been multiplied by the product of the preceding amounts;
(5) Substitute the cost-of-living increase percentage(s) that would have been used if the increase(s) had been based on the CPI (for some years, this will be the percentage that was used), and do the same computations as in paragraphs (d) (1) through (4) of this section. The result is what we call the assumed CPBI.
(3) Divide the answer from paragraph (e)(1) of this section by the answer from paragraph (e)(2) of this section, multiply the quotient by 100, and round to the nearest 0.1. The result is the additional increase percentage, which we apply to the appropriate amount described in § 404.271 after that amount has been increased under § 404.275 for a given year. If that increased amount is not a multiple of $0.10, we will decrease it to the next lower multiple of $0.10.
(f) Restrictions on paying an additional cost-of-living increase. We will pay the additional increase to the extent necessary to bring the benefits up to the level they would have been if they had been increased based on the CPI. However, we will pay the additional increase only to the extent payment will not cause the OASDI fund ratio to drop below 32.0 percent for the year after the year in which the increase is effective.
[51 FR 12604, Apr. 21, 1986, as amended at 69 FR 19925, Apr. 15, 2004; 83 FR 21708, May 10, 2018]