Irmaa Brackets 2024 Part D. The irmaa income brackets for 2023 start at $97,000 ($103,000 in 2024) for a single person and $194,000. What are the 2024 irmaa brackets?

The irmaa for part b and part d is calculated according to your income. The social security administration (ssa) sets four income brackets that determine your (or your and your spouse’s) irmaa.