Seven new rules for Social Security are in effect for 2026, including a 2.8% cost-of-living adjustment (COLA) that raises average monthly benefits for retirees and disabled workers. While this COLA aims to combat inflation, Medicare Part B premiums are increasing by 9.7%. Some workers may face higher taxes, while high earners might receive larger checks later. These adjustments reflect Social Security's regular updates to support beneficiaries, highlighting the program's crucial role as a primary financial support for a vast majority of retired Americans.