What happens if my income or family size changes during the year?

The actual premium tax credit for the year will differ from the advance credit amount estimated by the Marketplace if your family size and household income as estimated at the time of enrollment are different from the family size and household income you report on your return. If your actual allowable credit on your return is less than your advance credit payments, the difference, subject to certain caps, will be subtracted from your refund or added to your balance due.