Direct answer: If your ACA subsidy is too high, you may have to repay some of the advance premium tax credit when you file taxes. If it is too low, you may receive the difference as a tax credit. The reconciliation is done with IRS Form 8962 using your Form 1095-A.
The practical fix is to update HealthCare.gov during the year when income or household details change, instead of waiting until tax time.
What can make a subsidy wrong?
- Your income estimate was too low or too high.
- You changed jobs, lost income, gained income, or became self-employed.
- Your household size changed because of marriage, divorce, birth, adoption, or tax dependent changes.
- You moved to a different county or state.
- You became eligible for Medicare, CHIP, or employer coverage, or employer coverage.
What to do now
Update your Marketplace application when your expected annual income changes. You can usually adjust how much premium tax credit is applied monthly. Some households choose to use less than the full estimated credit during the year to reduce repayment risk.
Income estimates are not last year's income
Marketplace savings are based on the income you expect for the coverage year. If your 2027 income is different from 2026, your application should reflect your expected 2027 income.
When to talk to David
Talk to David if you are self-employed, paid by commission, recently changed jobs, lost employer coverage, are close to Medicare age, or are unsure whether to adjust your subsidy during the year. David can help review the insurance side; tax-specific advice should come from a qualified tax professional. For the reporting process itself, see what happens if income changes after you enroll.
Review the subsidy before it becomes a tax problem
David can help compare your current Marketplace setup, expected income, plan options, and whether the monthly credit should be adjusted.
Request ACA Help Call (863) 640-3102FAQ
What happens if my ACA subsidy is wrong?
You reconcile the advance premium tax credit on your federal tax return. Too much credit can increase tax owed or reduce a refund; too little may create an additional credit.
Should I update my ACA income during the year?
Yes. Update income, household size, address, and coverage eligibility changes as soon as possible so the monthly credit is closer to the final amount.
Primary sources
This page is educational and is not tax, legal, or financial advice. David Huff is not a CPA or tax attorney. Confirm tax questions with a qualified tax professional and confirm Marketplace eligibility through HealthCare.gov.