Proration of COLA's
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
(a) The full amounts of COLA's are payable on annuities having a commencing date more than 11 months before the effective date.
(b)(1) Prorated portions of COLA's are payable of annuities having a commencing date within 11 months before the effective date.
(2) Proration is based on the number of months (with any portion of a month counting as a month) between the annuity commencing date and the effective date.
(3) For survivors of deceased retirees, proration is determined by the date the annuity was first payable to the deceased retiree.
(4) Proration applied to the assume social security disability insurance benefit is based on the commencing date of the disability annuity, not the beginning of the social security disability benefit.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.