2024 Irmaa Brackets Part D. Irmaa is calculated using the income reported on your tax returns from two years prior. The projected average total part d beneficiary premium is projected to decrease by 1.8% in 2024, from $56.49 in 2023 to $55.50 in 2024.

Most other medicare part d beneficiaries earning over. The calculation is a tiered system where the amount of the premium increase depends on the individual’s income level.