S-Corp Premium Tax Credit: The ACA Repayment Cap Is Gone
If your S-corp pays for your health insurance and you buy that coverage on an ACA Marketplace rather than through a group plan, a change buried in the One Big Beautiful Bill Act is worth knowing about before you enroll for 2027. The s-corp premium tax credit math used to come with a safety net: if your actual income came in higher than what you estimated at enrollment, the amount of excess credit you had to repay was capped. For tax years beginning after December 31, 2025, that cap is gone. If you underestimate your income, you repay all of it, not a limited slice of it.
What the S-Corp Premium Tax Credit Repayment Cap Used to Do
Here is the mechanic this affects. When you enroll in a Marketplace plan, the Exchange estimates your household income for the year and pays an advance premium tax credit (APTC) directly to your insurer each month. At filing, you reconcile that advance against the premium tax credit you actually qualify for on Form 8962. If your real income turned out higher than your estimate, you received more APTC than you were entitled to, and the excess gets added back to your tax bill.
Section 36B(f)(2)(B) used to put a ceiling on that add-back for taxpayers under 400% of the federal poverty level (FPL), regardless of how far off the original estimate was. Guess too low, and the repayment was still limited. That provision is what the IRS is now proposing to strike from its own regulations.
OBBBA Repeals the Cap Starting With 2026 Returns
Section 71305 of the OBBBA removed Section 36B(f)(2)(B) outright, effective for tax years beginning after December 31, 2025. The IRS confirmed how it plans to implement that repeal in proposed regulations published in the Federal Register on October 15, 2026 (REG-101576-26), which revise Treas. Reg. § 1.36B-4(a)(3) so that, starting with 2026 returns, the full amount by which your advance payments exceeded your allowed credit increases your tax liability for the year. No cap, no proration by income band.
The same proposed regulations also retire a coordination rule that applied specifically to taxpayers claiming a Section 162(l) self-employed health insurance deduction for their Marketplace premiums. That rule only mattered while a repayment cap existed to coordinate with. Section 162(l) is the exact deduction a 2% S-corp shareholder uses to offset the Marketplace premiums the corporation pays or reimburses, so this is not an abstract change for pass-through owners with a group of one.
Why S-Corp Owners Carry More of This Risk
If you own more than 2% of your S-corp’s stock and the corporation pays or reimburses your health insurance premiums, IRS Notice 2008-1 requires those premiums to be reported in your W-2 Box 1 wages for the same year the corporation pays or reimburses them. (See our guide to how S-corp health insurance benefits work if you need the mechanics behind that rule.) You then take the offsetting deduction above the line under Section 162(l) on your personal return. Both the wage inclusion and the deduction run through your adjusted gross income, which is the starting point for the modified adjusted gross income (MAGI) the Marketplace uses to estimate, and the IRS uses to reconcile, your premium tax credit.
A typical W-2 employee has limited control over their own pay in a given year. You usually do not. Between setting your own reasonable salary, deciding on a year-end bonus, and choosing how much to take as salary versus distribution, an S-corp owner has far more ability to move their own MAGI after the Marketplace estimate is already locked in. Under the old rules, a bonus that pushed your income above projection meant a capped, predictable repayment. Under the new rules, it means the full excess APTC comes back as a tax bill with no ceiling.
The 400% Income Cliff Is Back, Too
This change does not land in isolation. Under Section 36B(c)(1)(A), you are only an “applicable taxpayer” eligible for any premium tax credit if your household income falls between 100% and 400% of the FPL for your family size. Temporary relief enacted in 2021 and extended by the Inflation Reduction Act had removed that 400% ceiling through 2025, letting higher earners qualify for at least a partial credit. That relief expired at the end of 2025 and has not been extended, so the hard 400% cutoff is back in force for 2026 coverage. Cross that line and you owe back every dollar of APTC paid on your behalf, with no credit at all to offset it, now combined with the repayment rule above that no longer limits the damage if you are near that line and guessed wrong.
What to Do Before You Enroll for 2027
Run your full-year numbers before you set your Marketplace income estimate, not after. That means projecting W-2 wages, any planned bonus, and expected distributions together, the same way you would when setting your S-corp health insurance plan up for the year, rather than estimating off last year’s return.
Consider taking less APTC upfront if your income is close to a threshold. You can elect to have less advance credit paid monthly and claim the balance, if any, when you file. With the repayment cap gone, that trade is now more favorable than it used to be if there is real uncertainty about where your income lands.
Update your Marketplace estimate the moment your plans change. If a Q4 distribution or bonus decision shifts materially after open enrollment, reporting the change to the Exchange adjusts your advance payments in real time instead of surfacing the whole gap at filing.
This Is a Projection Problem, Not a Guess
None of this means you should avoid Marketplace coverage if your S-corp doesn’t offer a group plan. It means the cost of guessing wrong on income just went up, and for an owner who sets their own salary and timing, that guess is more within your control than you might assume. Getting your wage, bonus, and distribution plan coordinated with your Marketplace estimate before you enroll is exactly the kind of calculation that depends on your specific numbers. Schedule a consultation with our team before your next enrollment window to make sure your estimate and your actual plan for the year match.