Irmaa 2024 Tax Brackets. Irmaa is a surcharge that people with income above a certain amount must pay in addition to their medicare part b and part d premiums. Once the irmaa calculations are done, cms notifies the social security.

This article reviews the 2024 and projected 2025 irmaa income brackets, as well as how irmaa brackets are calculated and how you pay the extra surcharge. To determine whether you are subject to irmaa charges, medicare uses the adjusted gross income you reported on.