Income-Related Monthly Adjustment Amount (IRMAA) is a premium surcharge applied to Medicare Part B and Part D for high-income earners, based on income tax returns filed two years before the current year. When income exceeds predefined limits, Medicare premiums rise. Both Original Medicare and Medicare Advantage plan holders may be subject to IRMAA charges. Below, we explain the 202... https://www.federalpensionadvisors.com/post/2025-irmaa-brackets