2025 Irmaa Brackets Based On 2025 Income Tax. The social security administration determines irmaa based on your tax return, and if applicable, you will receive an irmaa letter notifying you of the increased premium amount. Medicare's mandatory part b premium will.

Find out how the 2025 medicare irmaa brackets could affect your premiums. In 2025, the medicare irmaa brackets will be adjusted based on the income you reported two years prior, which means your 2023 income will determine your irmaa for 2025.