2025 Irmaa Brackets For Medicare Part B And D 2025. The standard monthly premium for medicare part b enrollees will be $185.00 for 2025, an increase of $10.30 from $174.70 in 2024. The projected irmaa for medicare part b and medicare part d is determined using a sliding scale with five income 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. Part b is optional, and for 2024, part b’s premium is $174.70 per month.