Federal Retirees: When Will Your 2026 COLA Increase Appear in Your Annuity? Once the annual COLA for federal retirees is announced in October, when do the higher annuity payments begin? The government announced in October that the 2026 cost of living adjustment (COLA) for federal retirees will be 2.8%. The COLA process is complex, and it can be confusing for federal retirees to know when to expect the new amount to actually hit their monthly payments. The COLA that is announced in Oct...