2024 Irmaa Brackets For Medicare Part B And D Plans.  — understanding the 2024 irmaa brackets:  — the following table shows the income brackets and irmaa amount you’ll pay for part b and part d in 2024 (based on your 2022 tax return):

Here’s a chart explaining how income affects the part b premium and part d irmaa. For 2024, the income brackets for part b and part d are the same.