Paying Back Premium Tax Credits: Why You Can Owe at Tax Time

The credit is an estimate until you file

When you enroll in a Marketplace plan, you give an estimate of your household income for the coming year. The Marketplace uses it to calculate an advance premium tax credit and sends that amount to your insurer every month, which is why your bill is lower than the plan's full price. But the credit you are actually entitled to is based on your real income for the year, and the IRS does not know that number until you file.

Reconciliation is the step where the two are compared. Early in the year, the Marketplace sends you Form 1095-A, which shows your premiums, the benchmark plan price and the advance credit paid for each month. You or your preparer use it to complete Form 8962, which works out the credit you qualified for based on your final income.

• If you received less than you qualified for, the difference increases your refund or lowers what you owe.
• If you received more than you qualified for, the difference is called excess advance credit, and it is added to your tax bill.

What changed starting with 2026

Until recently, households under 400 percent of the federal poverty level had a cap on how much excess credit they had to pay back. The cap depended on income and filing status, and for many people it kept a bad estimate from turning into a large bill. Households above 400 percent never had that protection.

Federal law has removed those caps. Starting with the 2026 tax year, meaning the return you file in 2027, anyone who received more advance credit than they qualified for repays the full excess, whatever their income. Add the end of the enhanced credits after 2025 and the return of the hard 400 percent line, and the cost of a wrong estimate is much larger than it was a few years ago. The subsidy cliff guide lays out the income lines for 2027.

Two ways the bill shows up

Your income rises but stays under the line. You still qualify for a credit, just a smaller one, because the share of income you are expected to pay toward the benchmark plan goes up as income goes up. Picture a single graphic designer in Tampa who estimated $45,000 for 2026 and finished the year at $55,000. Her credit for the year is smaller than the advance her insurer received. Under the old rules a cap might have limited what she paid back. Under the new rules she repays the entire difference.

Your income crosses the line. For 2026 coverage, the line is 400 percent of the 2025 poverty guidelines: $62,600 for one person and $128,600 for a family of four. If the same designer had finished at $66,000, she would qualify for no credit at all, and every dollar of advance credit paid on her behalf from January through December would come back on her return. That part is not new. What is new is that the first case now works the same way, just on a smaller scale.

The older you are, the bigger the numbers, because full-price Marketplace premiums rise with age and so does the credit that has to be repaid.

Who tends to get caught

• Self-employed people and freelancers, whose income depends on clients and timing. The ACA subsidies for the self-employed guide covers how to estimate.
• Commission earners and real estate agents, whose year can turn on a few closings.
• People who sell a rental property, a business or investments at a taxable gain, because the gain counts as income for the year it is received.
• Early retirees drawing from retirement accounts or doing a Roth conversion.
• Newly married couples, whose combined income and household size change the math. The getting married guide covers that.
• Anyone offered job-based coverage mid-year who keeps the advance credit. If the employer's plan is considered affordable, the credit generally is not allowed for those months.

How to avoid a surprise

1. Start with an honest estimate. Use last year's return as the base, then adjust for what you already know about this year. For self-employment income, use net profit after business expenses, not gross receipts.
2. Update your income on HealthCare.gov mid-year. If your income changes, log in and update your application, or use your state's exchange if it runs its own. HealthCare.gov asks you to report changes within 30 days. The advance credit is recalculated for the months left, so an update in June spreads the adjustment over six months instead of landing all at once at tax time.
3. Take less than the full advance. You can choose to apply only part of your credit each month. If you are unsure of your income, a smaller advance now means a smaller bill, or a refund, later.
4. Set money aside. If you are taking a credit you may not fully qualify for, put the difference in savings each month.
5. Check in each quarter. If you pay estimated taxes, review your Marketplace estimate at the same time.
6. Report the other changes too. A marriage, divorce, new baby, move or new offer of employer coverage all change the credit.

When self-employed income swings

For self-employed people, the hard part is that the number you need, net income for the full year, is not known until after the year ends. A few habits help. Keep a running profit and loss statement so you can see where the year is heading by midsummer. Remember that the income used for the credit comes after business expenses and certain adjustments, such as half of your self-employment tax and contributions to a SEP-IRA or solo 401(k), so a retirement contribution can move the number. If a big contract lands in the fall, update the Marketplace right away instead of waiting until April. General information, not tax advice — confirm with your CPA based on your specific entity structure.

If you are near the line, decide on purpose

If your income could land on either side of the 400 percent line, a Marketplace plan with an advance credit is a bet on your estimate. There are cleaner choices:

• Plan to stay under the line, with your accountant's help.
• Keep the Marketplace plan but skip the advance credit, then claim whatever you qualify for when you file.
• Choose coverage that does not depend on the credit. Private, medically underwritten plans are priced on age, zip code and health rather than income, so there is nothing to reconcile. Approval depends on your health answers and benefits vary by plan, so they fit healthy households best.

The private vs Marketplace guide lays out those trade-offs.

Switching plans mid-year

If you leave the Marketplace for a private plan or a job-based plan, end your Marketplace coverage on a clean date so the advance credit stops. You still reconcile the months you had, using your income for the whole year. The switching guide walks through the timing.

Filing rules worth knowing

• If any advance credit was paid for your coverage, you need to file a federal return with Form 8962, even if your income would not otherwise require a return.
• Married couples generally must file jointly to claim the credit, with limited exceptions.
• If you do not reconcile, you can lose eligibility for advance credits in a later year.
• Wait for your Form 1095-A before you file, and check it. If something is wrong, ask the Marketplace for a corrected form.

I am an insurance broker, not a tax preparer; your CPA or preparer completes Form 8962. General information, not tax advice — confirm with your CPA based on your specific entity structure.

Where I fit

Each fall I go over income estimates with clients before they renew, quote the Marketplace with a realistic credit next to private plans priced on health, and help update applications when income changes during the year. I work by phone and video in 31 states, including Florida and Georgia. Start a quote or call (786) 218-2384.