How Does a Tax Credit Work for Health Insurance?

A tax credit for health insurance works by paying part of your monthly premium for a plan bought through the Health Insurance Marketplace, with the government covering the gap between a set share of your income and the cost of a benchmark plan in your area. The Premium Tax Credit is refundable, so it can wipe out your tax bill and still produce a refund if the credit is larger than what you owe.¹ You can take it in advance to lower each month’s premium or wait and claim the full amount when you file your return. It only applies to plans bought through the Marketplace, not to employer coverage or plans purchased directly from a private broker.²

Who Qualifies

Income is the main gate. Household income generally has to fall between 100% and 400% of the federal poverty level.³ Using the 2026 poverty guidelines, that runs from roughly $15,960 to $63,840 for a single person and about $33,000 to $132,000 for a family of four.⁴ Recent legislation (P.L. 119-21) contains provisions that may extend eligibility to some households earning above 400% FPL for the 2026 plan year; HealthCare.gov will confirm your status during enrollment.

The Marketplace also checks a few other boxes. You have to be enrolled in a plan through the federal or a state Marketplace.² You cannot be eligible for employer coverage that is both affordable and meets minimum value standards; for 2026, employer coverage counts as affordable if the cheapest self-only option costs no more than 9.96% of household income.⁵ You must be a U.S. citizen, U.S. national, or lawfully present.⁶ Married couples generally have to file jointly, though a separate return is allowed if you live apart from your spouse and are a victim of domestic abuse or spousal abandonment.⁷ And no one else can claim you as a dependent.³

How the Credit Amount Is Figured

The math turns on one plan: the second-lowest-cost Silver plan available to your household on the Marketplace, known as the benchmark plan. You don’t have to buy that plan. The government just uses its premium as the yardstick.⁶

Step one: the IRS sets what share of your income you are expected to put toward premiums. That share climbs with income. Households near the poverty line contribute a small percentage; households closer to the top of the eligibility range contribute more. For 2026 the applicable percentages run from about 2.10% of income for households below 133% FPL to 9.96% for those between 300% and 400% FPL.⁵

Step two: subtract your expected contribution from the annual cost of the benchmark plan. The difference is your credit. Apply it to a cheaper Bronze plan and your monthly bill can be very low, sometimes zero. Apply it to a Gold or Platinum plan and you pay the difference between that plan’s premium and the credit.

Getting the Credit Monthly or at Tax Time

Once the Marketplace figures out how much you qualify for, you choose how to take it. Most people use the Advance Premium Tax Credit, where the government pays the subsidy directly to your insurer each month and your bill shows the lower amount.⁶ Three options are on the table:

Take 100% in advance for the lowest possible monthly premium.
Take part in advance and claim the rest at tax time. This builds in a cushion in case your income ends up higher than you predicted.
Take none in advance, pay full premiums all year, and claim the whole credit as a refund when you file.²

Because the advance amount is based on the income you estimate at enrollment, the estimate matters. Guess too low and you may receive more subsidy than you were entitled to and owe some of it back. Guess too high and you pay more out of pocket than you needed to.

Reconciling at Tax Time

If any advance credit was paid during the year, you have to reconcile it on your federal return. This is a condition of receiving the credit, not a choice.

Early in the following year, the Marketplace sends you Form 1095-A. It lists your monthly premiums, the benchmark plan cost, and the advance credit payments the government made on your behalf.⁸ Those figures go on Form 8962, which you attach to your return. Form 8962 compares the advance payments you actually received to the credit you actually qualify for based on your final income.⁹

Two things can happen. If you earned less than you estimated, the final credit is larger than what was paid in advance and the difference boosts your refund. If you earned more, the advance payments were too high and you owe the difference back.

Even if you skipped the advance and paid full premiums all year, you still file Form 8962 to claim the credit as a refund.⁹ And if you took advance payments but do not file a return with Form 8962, the IRS can hold your refund, you may lose eligibility for advance payments the next year, and you can still be on the hook for any overpayment.¹⁰

Repayment Rules Have Tightened for 2026

Older rules capped how much excess advance credit you could be forced to repay based on your income. Those caps are gone for the 2026 plan year. Under Section 71305 of P.L. 119-21, if your advance payments exceed the credit you actually qualify for, you owe the full difference no matter what your income is.¹¹ That excess is added to your tax bill, reducing your refund or increasing what you owe.¹²

Because the caps are gone, an accurate income estimate is worth real money. Two habits reduce risk: report a raise, bonus, or other income bump to the Marketplace as soon as you know about it, and consider taking only part of the credit in advance so a surprise increase does not turn into a lump-sum bill at filing.

What to Report Mid-Year

Your credit is calculated from the income and household size you reported at enrollment. When those change, telling the Marketplace keeps the advance payments in line with reality and prevents a large reconciliation later. Changes worth reporting include:

A meaningful increase or decrease in income
Marriage or divorce
The birth or adoption of a child
Gaining or losing access to employer coverage
A move to a new area with a different set of plans

Income is what feeds the calculation, and the Marketplace uses Modified Adjusted Gross Income, or MAGI, which is your adjusted gross income plus untaxed foreign income, non-taxable Social Security benefits, and tax-exempt interest. Supplemental Security Income does not count.¹³ Last year’s tax return is a starting point, but the Marketplace wants your best estimate for the coverage year itself.

1
Internal Revenue Service. Premium Tax Credit (PTC) Overview
2
HealthCare.gov. Premium Tax Credit – Glossary
3
Office of the Law Revision Counsel. 26 USC 36B – Refundable Credit for Coverage Under a Qualified Health Plan
4
U.S. Department of Health and Human Services. 2026 Poverty Guidelines
5
Internal Revenue Service. Rev. Proc. 2025-25
6
Internal Revenue Service. The Premium Tax Credit – The Basics
7
Internal Revenue Service. Internal Revenue Bulletin 2017-33
8
Internal Revenue Service. About Form 1095-A, Health Insurance Marketplace Statement
9
Internal Revenue Service. Instructions for Form 8962
10
Internal Revenue Service. Premium Tax Credit – Claiming the Credit and Reconciling Advance Credit Payments
11
CMS Agent and Broker FAQ. Are There Limits to How Much Excess Advance Payments of the Premium Tax Credit Consumers Must Pay Back
12
Internal Revenue Service. Updates to Questions and Answers About the Premium Tax Credit
13
HealthCare.gov. Modified Adjusted Gross Income (MAGI) – Glossary