Social Security offers a 5.9% cost-of-living adjustment. What if I am delaying my benefits? The Social Security Administration officially published the 5.9% cost-of-living adjustment (COLA). The 5.9% COLA increase is the largest adjustment to the benefit in 39 years. So how does this affect those delaying their benefit? First, let’s start with how Social Security calculates the COLA, and then, how those both receiving the benefit and delaying the benefit are affected. COLAs h