{
  "dataset": "Medicare IRMAA brackets 2026",
  "year": 2026,
  "status": "final",
  "magiIncomeYear": 2024,
  "announced": "2025-11-14",
  "currency": "USD",
  "amountsAre": "per person, per month, in US dollars",
  "partBStandardPremium": 202.9,
  "partBDeductible": 283,
  "tierSemantics": "A filer is in the HIGHEST tier whose condition is true: MAGI (aboveOp) (singleAbove|jointAbove). aboveOp is '>' for indexed tiers and '>=' for the top tier. Example, 2026 single: MAGI of exactly 137000 is NOT > 137000, so it falls to the tier where MAGI > 109000 (tier 1). MAGI of exactly 500000 IS >= 500000 (tier 5). This reproduces the CMS table language exactly ('greater than X and less than or equal to Y'; top tier 'greater than or equal to').",
  "tiers": [
    {
      "tier": 0,
      "singleMagiAbove": null,
      "jointMagiAbove": null,
      "comparison": null,
      "partBMonthly": 202.9,
      "partBIrmaaMonthly": 0,
      "partDIrmaaMonthly": 0
    },
    {
      "tier": 1,
      "singleMagiAbove": 109000,
      "jointMagiAbove": 218000,
      "comparison": ">",
      "partBMonthly": 284.1,
      "partBIrmaaMonthly": 81.2,
      "partDIrmaaMonthly": 14.5
    },
    {
      "tier": 2,
      "singleMagiAbove": 137000,
      "jointMagiAbove": 274000,
      "comparison": ">",
      "partBMonthly": 405.8,
      "partBIrmaaMonthly": 202.9,
      "partDIrmaaMonthly": 37.5
    },
    {
      "tier": 3,
      "singleMagiAbove": 171000,
      "jointMagiAbove": 342000,
      "comparison": ">",
      "partBMonthly": 527.5,
      "partBIrmaaMonthly": 324.6,
      "partDIrmaaMonthly": 60.4
    },
    {
      "tier": 4,
      "singleMagiAbove": 205000,
      "jointMagiAbove": 410000,
      "comparison": ">",
      "partBMonthly": 649.2,
      "partBIrmaaMonthly": 446.3,
      "partDIrmaaMonthly": 83.3
    },
    {
      "tier": 5,
      "singleMagiAbove": 500000,
      "jointMagiAbove": 750000,
      "comparison": ">=",
      "partBMonthly": 689.9,
      "partBIrmaaMonthly": 487,
      "partDIrmaaMonthly": 91
    }
  ],
  "marriedFilingSeparately": [
    {
      "singleMagiAbove": null,
      "comparison": null,
      "partBMonthly": 202.9,
      "partBIrmaaMonthly": 0,
      "partDIrmaaMonthly": 0
    },
    {
      "singleMagiAbove": 109000,
      "comparison": ">",
      "partBMonthly": 649.2,
      "partBIrmaaMonthly": 446.3,
      "partDIrmaaMonthly": 83.3
    },
    {
      "singleMagiAbove": 391000,
      "comparison": ">=",
      "partBMonthly": 689.9,
      "partBIrmaaMonthly": 487,
      "partDIrmaaMonthly": 91
    }
  ],
  "source": "CMS fact sheet '2026 Medicare Parts A & B Premiums and Deductibles' (Nov 14, 2025), https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles ; corroborated by Federal Register 90 FR 52063-52074 (Nov 19, 2025)",
  "sourceUrl": "https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles",
  "canonicalUrl": "https://cobaltmedicare.com/irmaa-brackets-2026/",
  "publisher": "Cobalt Medicare",
  "license": "CC BY 4.0",
  "attribution": "Cobalt Medicare, https://cobaltmedicare.com/irmaa-brackets-2026/",
  "updated": "2026-09-13"
}