If you buy your own health coverage through the ACA Marketplace, the premium tax credit can be one of the biggest factors in what you actually pay each month — and it runs on an estimate you give at enrollment, not your final numbers for the year. That estimate always mattered. It matters more now: two protections that used to soften a wrong guess expired after 2025, and the standard, stricter rules are back in place for 2026 and beyond.
- The premium tax credit is based on your estimated household income, household size, and the benchmark Silver plan where you live. You choose how much of it to take in advance against your monthly premium, and it's reconciled at tax time.
- From 2021 through 2025, a temporary expansion removed the income cap on eligibility. That expansion expired, so income above 400% of the federal poverty line now means no credit at all.
- A separate cap that used to limit how much you'd repay if you underestimated your income is also gone for tax years after 2025 — you now repay the full excess, whatever your income.
- North Carolina uses the federal healthcare.gov Marketplace, not a state-run exchange.
How the credit actually works
When you apply for a Marketplace health plan, you estimate your household income for the coming year. The Marketplace uses that estimate, your household size, and the cost of the benchmark Silver plan in your area to determine whether you qualify for a premium tax credit and how much it may be. You can choose to use all, some, or none of the credit in advance. The amount you use in advance is paid directly to the insurer each month and reduces what comes out of your pocket.
That word “advance” is the part people gloss over. It’s a projection, not a settled number. When you file your taxes, you reconcile the advance payments against what you actually qualified for based on your real income, using IRS Form 8962. If you received less advance credit than you ultimately qualified for, you may claim the difference when you file your taxes. If you received more than you qualified for, you may owe some of it back.
The cliff is back, and so is full repayment
Two separate protections cushioned that reconciliation for several years, and both are gone now. Here’s the comparison, straight from the IRS’s own guidance on the credit:
| 2021–2025 (temporary expansion) | 2026 and after (current rule) | |
|---|---|---|
| Income cap for eligibility | None — any income level could potentially qualify | Restored: generally 100%–400% of the federal poverty line |
| Cost above the income cap | Not applicable — no cap existed | Above 400% of the federal poverty line, you’re not eligible for any credit |
| Repayment if you underestimated income | Capped for many households, based on income | No cap — you repay the full excess advance credit, regardless of income |
That middle row is what people mean by the “subsidy cliff”: cross 400% of the federal poverty line and the credit doesn’t taper off, it disappears, and any advance payments you already received for the year would need to be repaid in full. The exact income dollar figure depends on household size and is published annually — checking it against your own household on healthcare.gov is worth doing before you rely on last year’s number.
The bottom row matters even if you’re nowhere near that line. Previously, if you stayed under 400% of the federal poverty line but still underestimated your income, a repayment cap limited the damage. For tax years after 2025, that cap is gone. An underestimate now costs whatever the actual gap turns out to be — for anyone receiving the credit, not just people near the cliff.
Why the estimate is the decision that matters most
I see a version of this every fall with self-employed clients here in Charlotte: someone carries last year’s income into a new Marketplace application because it’s the easiest number to type in, a stronger year quietly moves them past 400% of the federal poverty line, and neither the credit nor the repayment cushion they were expecting is still there. It’s not a mistake anyone makes on purpose — it’s just that the estimate is often entered at enrollment and then left unchanged while life doesn’t hold still for a year.
The fix isn’t a better guess up front. It’s treating the estimate as something you revisit. Your healthcare.gov account lets you update your income during the year as things change — a new contract, a slow season, a spouse’s raise — rather than finding out everything at once at tax time. If your income genuinely varies month to month, that’s the tool built for exactly this.
This is where working with someone who does this daily earns its keep — not predicting your tax bill (I’m a licensed insurance agent, not a tax professional, and I won’t compute or promise a tax outcome), but helping you build a realistic estimate and flagging when it’s worth revisiting. What you’ll actually owe or get back belongs with a tax professional or the IRS’s own guidance on Form 8962.
One more distinction: the credit is available only through eligible Marketplace enrollment and does not apply to short-term health plans, no matter your income — one more reason that comparison isn’t just about the sticker price.
A North Carolina note
North Carolina doesn’t run its own health insurance exchange — Marketplace enrollment, income estimates, and premium tax credit eligibility all go through the federal healthcare.gov platform directly. If you’ve recently moved to North Carolina, re-shopping your coverage on healthcare.gov (rather than assuming a prior state’s plan or estimate carries over) is worth doing early, since available plans, provider networks, premiums, and the benchmark premium used in the credit calculation can all change when you move.
The same goes if you’ve recently left a job and are weighing a Marketplace plan against COBRA — the premium tax credit is one of the biggest variables in that comparison, and it’s worth running the estimate before you choose either one.
What to do before Open Enrollment
For 2027 coverage, Open Enrollment is expected to begin November 1, 2026. Confirm the final deadline on HealthCare.gov before enrolling, since Marketplace enrollment dates can change. Before it opens:
- Check whether your healthcare.gov income estimate still reflects reality, and update it now if your income has moved since you last enrolled.
- If you’re self-employed or your income varies, treat the estimate as something to revisit through the year, not a one-time entry.
- Confirm your numbers against healthcare.gov’s current guidelines rather than a prior year’s figures — poverty-line thresholds are published annually and do change.
None of this replaces a conversation with a tax professional about your specific numbers. But getting the estimate right is squarely part of enrollment, and worth a few extra minutes before you submit an application built on a guess from a different year.
If you want a second set of eyes on your estimate or your options before Open Enrollment opens, book a call — I work with multiple carriers on the Marketplace and can walk through it with you.
