Social Security COLA 2027: Latest Estimate, Payment Dates & How Much Your Check Rises Social Security COLA 2027 is not official yet. As of August 21, 2026, AARP forecasts a 3.5 percent increase and the Senior Citizens League forecasts 3.6 percent. The final number will use July, August... COLA 2027 Medicare Retirement Social Security 05-Aug-2026 0 126