IRMAA, short for Income-Related Monthly Adjustment Amount, is an extra charge for Medicare beneficiaries with higher incomes. It increases the cost of Part B and Part D premiums and is based on income from your tax return two years earlier. This adjustment applies to both Original Medicare and Medicare Advantage. Check out the IRMAA brackets for 2025 below, along with those for 202... https://www.federalpensionadvisors.com/post/2025-irmaa-brackets