Premium Tax Credit Repayment: Why Your Refund Shrank

If your refund shrank or you owed money at filing, the most likely reason is that you received more advance premium tax credit during the year than your actual income entitled you to. You have to repay the difference, and starting with tax year 2026 the cap that used to limit that repayment is gone.

That change is the single most important recent development for anyone taking advance payments. Understanding it, and understanding how the reconciliation calculation works, is how you stop the surprise from repeating.

How the credit becomes a repayment

The premium tax credit is based on your estimated household income for the year you want coverage, not on your final income. The Marketplace states that your tax credit is based on your household information and estimated income you enter on your application.

You can take that credit in advance, or wait and claim it at filing. The Marketplace describes the choice: you can use all, some, or none of your premium tax credit in advance to lower your monthly premium.

Advance payments are an estimate. At filing, the actual figure is calculated from your real income. If the advance was too large, the excess is repaid. The Marketplace is direct: if you use more of the premium tax credit than you qualify for based on your final yearly income, you must pay the difference when you file your federal income tax return.

The reverse also works. If you took too little, you will get the difference counted toward your refund or lower the amount of taxes you owe when you file.

That is the whole mechanism: estimate up front, reconcile at filing, settle the difference.

Why your estimate was probably wrong

Estimating a year of income in advance is difficult, and the difficulty is structural rather than a matter of carelessness.

For a salaried employee with a stable job, the estimate is usually close. For anyone whose income moves, it can be substantially off. Our guide to health insurance when you are self-employed covers the specific problem of projecting variable earnings.

Four things commonly push actual income above the estimate:

• A raise, a bonus, or extra hours. Income rises during the year but the application is not updated.
• A second job or new contract. Additional earnings arrive that were not in the projection.
• Investment income, a capital gain, or a retirement distribution. These count toward household income and are easy to overlook.
• A one-time event, such as a severance payment or the sale of an asset.

Two things can also push income below the estimate, which produces a refund rather than a repayment: losing a job, or reduced hours.

The practical fix is to update your Marketplace application when your income changes materially, rather than waiting until filing. Medicare's own guidance for a related situation makes the reasoning clear: reporting changes promptly is what keeps assistance aligned with reality. The same logic applies here.

The cap that no longer applies

For several years, households below a certain income threshold could repay only a portion of excess advance credit. That partial-repayment protection has been eliminated.

The Congressional Research Service describes the change precisely. Before it, excess advance payments had to be paid back, but with partial repayments of excess amounts allowed for households with incomes below 400% of the FPL. The reconciliation law then disallows partial repayments of excess APTC, requiring taxpayers to repay the full amount of any excess APTC, regardless of income level.

Timing matters, and the source is explicit: this provision applies to taxable years beginning after December 31, 2025.

So the change takes effect with tax year 2026. Filings for earlier tax years were still governed by the old limitation, which is why older Form 8962 instructions and older guidance still describe repayment caps. If you are reading a page that describes a cap, check which tax year it covers before relying on it.

The practical consequence: an underestimate that used to cost a capped amount may now cost the full difference. That does not change what happens, only how much it can be.

What else changed for 2026 and 2027

Two other developments interact with repayment, and both matter for planning.

The income cap is back. The enhanced premium tax credits that temporarily removed the 400% of federal poverty level eligibility ceiling expired at the end of 2025. The Congressional Research Service records that the provisions that expanded eligibility and enhanced subsidy amounts expired at the end of 2025. For 2026 and 2027, eligibility is again limited to households between 100% and 400% of the federal poverty level, as the Marketplace glossary states: income between 100% and 400% FPL qualifies for the premium tax credit. The IRS confirms the ceiling is operative in the rules rather than only in guidance: the applicable percentage table for tax year 2027 ends at not more than 400% of the federal poverty level, with no band above it.

The interaction with repayment is significant. A household that estimates just under 400% and actually lands just over it does not merely receive a smaller credit; it becomes ineligible for the credit entirely and must repay the advance payments. That is a much larger exposure than an ordinary reconciliation difference.

Our guide to the enhanced premium tax credit expiration covers what changed and who is most affected.

Accurate income reporting matters more, not less. Because the ceiling is restored and the repayment limit is gone, the two protections that used to absorb an estimate error are both reduced or absent. Updating the application during the year is now the main defense.

One caution about the legislative picture: this article states current program status from CRS and the Marketplace, and does not predict any future change. If the rules change again, the current-year guidance is the authority.

How to reduce your exposure

These are practical, and most are within your control.

• Update your income estimate during the year. Report a raise, a new job, or a large one-time payment when it happens, not at filing.
• Take less advance credit if your income is unpredictable. Taking a smaller advance and claiming the rest at filing reduces the risk of a repayment, at the cost of a higher monthly premium.
• Check your distance from 400% of the federal poverty level. Use the current HHS poverty guidelines for your household size. Being slightly over means no credit at all.
• Remember what counts as household income. It includes the income of everyone on your return, not just yours.
• Keep your Form 1095-A. The Marketplace provides it, and it reports the enrollment premiums and the second-lowest-cost silver plan premium used in the calculation.
• File and reconcile even in a year you would rather skip. Failing to reconcile can affect your eligibility for advance payments in later years.
• Consider an HSA or traditional IRA contribution if you are near a threshold. These can lower modified adjusted gross income, but only if you are eligible for the account and have the funds, and they must be made within the rules for the tax year.

What to do if you cannot pay

A repayment is a tax liability, not a collections emergency, and there are standard options.

The IRS offers payment plans and installment agreements for balances that cannot be paid at once, and it also administers an offer in compromise for cases where the full amount is genuinely not collectible.

The practical step is to file on time and address the balance rather than to delay filing. The IRS states that the failure to file penalty is 5% of the tax due for each month or partial month the return is late, accruing to a maximum of 25%, and that the penalty does not apply if you can show the failure was due to reasonable cause. Filing without paying is a materially cheaper error than not filing.

If the amount is large and the cause was an income change you reported but the Marketplace did not process, that is worth raising with the Marketplace before filing. The reconciliation is based on the advance payments actually made, so documentation of what you reported and when is useful.

This article explains the mechanism and is not tax advice. If the amount is significant, the calculation is worth reviewing with a tax professional who can look at your actual return.

What the number on your return means

One reframing helps more than any single tip. The repayment is not a penalty and it is not a mistake by the Marketplace. It is the difference between an estimate and an outcome.

If you received advance credit of a certain amount and your actual income entitled you to less, the difference was money you had use of during the year. The reconciliation simply trues it up. What changed for tax year 2026 is that the truing-up is now unlimited for higher-income households, which makes the estimate itself the thing to manage.

If you want to work through the estimate and the plan choice together, ask NavaQuote about health coverage options. Bring your expected household income, household size, current plan, and any changes you already know about. Our metal tiers guide explains how the tier affects your share of costs, and our off-exchange ACA plans guide covers what to compare if you conclude no credit applies.

Tax rules, income thresholds, and credit amounts change annually. Confirm the current tax year's rules in the IRS instructions for the form you are filing before you rely on any specific figure.