Irmaa Brackets 2024 Release Date. The irmaa for part b and part d is calculated according to your income. 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.
Irmaa is based on your income and your tax filing status. Here is a table of the medicare magi thresholds for premiums during 2025 that corresponds to the $161,000 threshold for premiums during 2024 and what the difference in.