2024 Irmaa Brackets Married Filing Jointly Over 55. Your 2024 irmaa is based on your 2022 tax return. If you file your taxes as “married, filing jointly” and your magi is greater than $206,000, you’ll pay higher premiums for your part b and medicare prescription drug coverage.

The irmaa is calculated on a sliding scale with five income brackets, topping out at $500,000 and $750,000 for individual and joint filing, respectively. Brackets for part b and part d are the same, but the additional amount you.