Irma Tax Brackets 2024. The irmaa for part b and part d is calculated according to your income. While your agi will be locked in on dec 31, 2023, only 4 of the 12 inflation numbers that 'lock in' the 2025 irmaa brackets will be known.

While your agi will be locked in on dec 31, 2023, only 4 of the 12 inflation numbers that ‘lock in’ the 2025 irmaa brackets will be known. Maximize your tax efficiency with our guide on irs tax brackets.