What Are The Irmaa Brackets For 2024 For Seniors. To determine whether you are subject to irmaa charges, medicare uses the adjusted gross income you reported on. The standard monthly premium for medicare part b enrollees will be $174.70 for 2024, an increase of $9.80 from $164.90 in 2023.

The following charts outline irmaa premium brackets based on income levels and tax filing statuses for medicare part b and part d. The irmaa is calculated on a sliding scale with five income brackets, topping out at $500,000 and $750,000 for individual and joint filing, respectively.