What is the Social Security COLA and how does it protect me from inflation?

The cost-of-living adjustment (COLA) automatically increases your Social Security benefit each year to keep pace with inflation, measured by the CPI-W index. The 2025 COLA was 2.5%, following 3.2% in 2024 and a large 8.7% in 2023 when inflation spiked. This inflation protection is one of Social Security's most valuable features — very few private annuities offer guaranteed lifetime increases tied to inflation. The COLA applies to your benefit base, so delaying your claim to lock in a higher starting amount means every future COLA is calculated on a larger number, compounding the advantage over decades. There is no COLA in years when prices fall; your benefit simply stays flat rather than dropping. For most retirees this annual raise is essential to maintaining purchasing power across a 25- or 30-year retirement.