What is a health insurance subsidy?

Last updated September 3, 2026.

The main subsidy is the premium tax credit: based on your expected household income for the coverage year, calculated as MAGI, it cuts your monthly marketplace premium, applied in advance. A second type, cost-sharing reductions, lowers deductibles and copays for Silver plans in qualifying income ranges. Two rules matter: the credit is reconciled at tax time, so overestimates of need get paid back, making prompt income updates essential; and affordable employer coverage or Medicaid eligibility disqualifies you. HealthCare.gov's estimator shows your number from household size, state, and income.

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