The IRMAA brackets are adjusted each year based on inflation and cost-of-living changes. The adjustments are determined by the Social Security Administration (SSA) and the Centers for Medicare & Medicaid Services (CMS). Increases in the Consumer Price Index (CPI) may lead to higher income thresholds for 2026 IRMAA brackets, allowing some beneficiaries to remain in a lower tier even if... https://www.federalpensionadvisors.com/post/2025-irmaa-brackets