If you are a Medicare beneficiary with a high income, you may be subject to the Income-Related Monthly Adjustment Amount (IRMAA). This surcharge applies to your Part B and Part D premiums, and it is determined by the income reported on your tax return from two years ago. If your income exceeds certain limits, you will pay more than the standard premiums. IRMAA applies to both Original... https://www.federalpensionadvisors.com/post/2025-irmaa-brackets