How the reconciliation works.
When you enroll, HealthCare.gov pays your credit to the insurer each month based on your estimated income. That is the advance premium tax credit. When you file taxes, Form 8962 recalculates the credit using your actual income. If you were paid too much, the difference is added to your tax bill. If you were paid too little, it is added to your refund.
Until 2025, households under 400% of the poverty level had a cap on how much they had to repay. Section 71305 of the 2025 budget law (H.R. 1) eliminated those caps for tax years beginning after December 31, 2025. Your 2026 return, filed in early 2027, is the first one with no cap.
A real example.
| 55-year-old in Travis County, TX | Monthly credit | Year |
|---|---|---|
| Estimated income: $39,000 | $818 | $9,816 paid to the insurer |
| Actual income: $55,000 | $635 | $7,620 actually earned |
| Owed back at tax time | $2,196, in full |
If the same person had crossed 400% of the poverty level ($62,600 for one person for 2026 coverage), every dollar of credit would have to be repaid, which at age 55 is more than $7,000.
How to avoid a surprise bill.
- Estimate the whole year honestly, including side income, bonuses, retirement withdrawals and all Social Security.
- Report changes within 30 days on HealthCare.gov: a raise, a new job, a marriage, a new dependent. Your credit adjusts for the rest of the year.
- If your income is unpredictable, estimate a little high or take less than the full credit each month. HealthCare.gov lets you choose how much to apply.
- Watch the 400% line. Near it, a year-end bonus or capital gain can erase the whole credit. See the subsidy cliff.
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Get my free optionsIf your income comes in lower.
You get the extra credit back as part of your refund. If your income falls below 100% of the poverty level after you estimated above it in good faith, you generally keep the credit you were paid. If it falls into a lower band mid-year, report it; you may also become eligible for cost-sharing reductions for the rest of the year.
Questions people ask.
What happens if I overestimate my income for health insurance?
You received less credit than you were entitled to, so the difference comes back to you as a larger refund when you file Form 8962.
What happens if I underestimate my income?
You repay the excess credit when you file. Starting with tax year 2026 there is no cap, so the full difference is due.
Do I have to file taxes if I got a premium tax credit?
Yes. Anyone who received advance payments must file a federal return with Form 8962, even if your income is otherwise below the filing threshold.
Sources.
- H.R. 1 (Public Law 119-21), sections 71304, 71305 and 71307. congress.gov
- IRS, About Form 8962, Premium Tax Credit. irs.gov
- IRS, The premium tax credit: the basics. irs.gov
- HealthCare.gov, How to report income and household changes. healthcare.gov
- CMS Marketplace API (HealthCare.gov plan and eligibility data), queried September 23, 2026. developer.cms.gov
General information for Texas and Oklahoma residents, not tax or legal advice. Rules and numbers can change; this page is reviewed on the date shown above. Your eligibility and prices are set by HealthCare.gov or the insurer when you apply.
Who wrote this.
RedHealth Advisors LLC is a licensed health insurance agency in Round Rock, Texas (Texas agency license 3449979, NPN 22110493), serving Texas and Oklahoma. Ryan Hutson is a licensed agent (NPN 21321807). Licensing details.