The Social Security Administration is expected to announce the 2027 cost-of-living adjustment (COLA) on October 14, 2026, once the Bureau of Labor Statistics releases September's CPI-W inflation data. Early estimates from groups like AARP, The Senior Citizens League, and independent analyst Mary Johnson range between 3.4% and 3.6%, which would raise the average retiree's monthly benefit by roughly $70–$75. The exact figure won't be confirmed until the official announcement, and there's a chance of delay if a government shutdown affects BLS data releases, as happened with the 2026 COLA. Once finalized, the new COLA will take effect for benefit payments starting January 2027.