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What is modified adjusted gross income (MAGI)?
MAGI is adjusted gross income plus untaxed foreign income, non-taxable Social Security benefits, and tax-exempt interest. It is used for premium tax credits, Medicaid, and CHIP, and for Medicare IRMAA brackets.
Definition and figures from HealthCare.gov glossary, CMS fact sheet, checked October 23, 2026. This page explains the term; it does not recommend a plan.
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MAGI: the facts
| Item | Fact | Source |
|---|---|---|
| Formula | AGI plus untaxed foreign income, non-taxable Social Security, tax-exempt interest | HealthCare.gov glossary: Modified Adjusted Gross Income (MAGI) |
| Medicare use | Sets the income-related monthly adjustment amount (IRMAA) | CMS fact sheet: 2026 Medicare Parts A & B premiums and deductibles (Nov 14, 2025) |
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What does MAGI mean in health insurance?
MAGI is adjusted gross income plus untaxed foreign income, non-taxable Social Security benefits, and tax-exempt interest. It is used for premium tax credits, Medicaid, and CHIP, and for Medicare IRMAA brackets.