Federal retirees and high-income seniors need to pay special attention to the 2026 IRMAA brackets. These income-related premium adjustments for Medicare Parts B and D can result in hundreds of dollars in additional monthly expenses. The IRMAA 2026 thresholds are based on your 2024 tax return, which means decisions made today will impact future premiums. Understanding the structure of ... https://www.federalpensionadvisors.com/post/2025-irmaa-brackets