https://social-security-cola-data.pages.dev/blog/ Guides and explainers from Social Security COLA History Data en-us https://social-security-cola-data.pages.dev/blog/average-cola-last-10-years https://social-security-cola-data.pages.dev/blog/average-cola-last-10-years The average Social Security COLA over the last 10 years is 3.1 percent and 2.6 percent over 20 years. See decade-by-decade averages, the full 1976-2026 breakdown, and why averages mislead. Thu, 01 Oct 2026 19:05:24 GMT https://social-security-cola-data.pages.dev/blog/how-cola-calculated https://social-security-cola-data.pages.dev/blog/how-cola-calculated The Social Security COLA comes from the CPI-W, not the headline CPI. Here is the exact formula, the third-quarter rule, and the worked 2026 calculation, plus why some years get 0 percent. Thu, 01 Oct 2026 19:05:24 GMT