Find out which 2026 IRMAA tier your income lands in and exactly what the Part B and Part D surcharges cost. IRMAA is a cliff — one dollar over a threshold can cost you hundreds a year.
IRMAA surcharges are based on income from two years ago — which means a retirement, divorce, or other major life change can trigger higher Medicare premiums unfairly. Here is how to appeal and when to expect relief.