Treasury Wants Stricter Obamacare Subsidy Verification. For Early Retirees, the Bigger Risk Is at Tax Time

New subsidy checks are being proposed, but the larger danger for early retirees is already on the books and can surface when taxes are filed.

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“Hardworking American taxpayers should not be forced to subsidize health care for people who are ineligible under federal law.”

That was Treasury Secretary Scott Bessent, who announced proposed rules aimed at tightening eligibility for the premium tax credit, the subsidy that helps lower the cost of health plans purchased through Affordable Care Act marketplaces (1, 2).

The Treasury said the changes, if adopted, would take effect in 2027 and would make sure subsidies “go only to Americans who qualify under federal law.” The proposal would also add “new verification criteria for any advance PTC payments” (1).

I’ve worked as a CPA since 1981, and I have no issue with verifying eligibility. Subsidies should go to the people the law says are entitled to them.

But for people who retire before 65 and buy their own coverage until Medicare begins, I’d argue the new verification rules are not the biggest threat. An already-enacted change is.

For tax years after 2025, the IRS says, “There is no repayment cap” on subsidies you received but were not eligible for (2). And open enrollment for coverage in 2027 starts Nov. 1 (3).

Here are five things early retirees should keep in mind.

1. What the proposed rules would change

These are still proposals. According to the Treasury, they would limit the credit to “U.S. citizens, U.S. nationals, and certain lawfully present noncitizens” and would introduce eligibility checks along with new verification requirements (1).

The Treasury also said changes to marketplace procedures are expected to be handled in separate proposed rules from the Department of Health and Human Services (1).

The release also points to the Centers for Medicare & Medicaid Services’ removal of more than 760,000 unverified enrollees from ACA rolls (1). If you are eligible and your documents are in order, the practical step is straightforward: respond quickly to any request for paperwork.

2. The bigger issue: repayment is no longer capped

Here is how the subsidy works. You estimate your income when you enroll, and the government pays part of your premium to the insurer in advance based on that estimate (2). At tax time, the figures are reconciled.

For years, the amount many people had to repay if they underestimated income was limited.

The 2025 tax law known as the One Big Beautiful Bill changed that by “removing the limitations on repayment of excess advance payments,” the IRS says (5).

The IRS says plainly: “For tax years after 2025, you must repay the full amount by which your advance credit payments exceed your Premium Tax Credit” (2).

It adds, “This amount is added to your total tax liability, which will reduce your refund or increase your balance due” (2).

If your advance payments end up being $6,000 higher than the credit you are actually entitled to, you would have to pay back the entire $6,000 with your tax return.

That is the kind of surprise worth planning for before choosing a plan.

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3. More retirement income counts than many people expect

This is where early retirees can get caught off guard. The marketplace definition of income is broader than many people assume.

According to HealthCare.gov, you should “Include both taxable and non-taxable Social Security income” (4).

You should also “Include most IRA and 401k withdrawals,” though not qualified distributions from a designated Roth account (4). Capital gains count too, as does tax-exempt interest (4).

So a large IRA withdrawal or a stock sale with a gain can push your income above what you estimated. My advice: if you rely on a subsidy, plan your withdrawals before you take them, not afterward.

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4. Report income changes right away

If your income rises during the year, do not wait until April to address it.

The IRS says that “Notifying the Marketplace about changes in circumstances as soon as they occur” allows your advance payments to be adjusted, which “will decrease the likelihood of a significant difference” at tax time (2).

That is inexpensive protection against a large bill: a quick update to your marketplace account.

5. Review your plan again when open enrollment begins

HealthCare.gov says open enrollment starts Nov. 1. If you “Enroll by December 15,” your coverage starts Jan. 1 (3).

Do not simply let last year’s plan renew automatically. Review your income estimate carefully and compare what you would actually pay.

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My honest take

Bessent’s point is reasonable. Subsidies funded by taxpayers should go to people who qualify.

But for early retirees, the bigger risk is not a new verification form. It is misjudging income in a year when the law no longer limits how much you may have to repay.

Get the estimate right, update it when your circumstances change, and the subsidy can do what it is supposed to do: bridge you to Medicare without breaking your budget.

Sources: 1. U.S. Department of the Treasury; 2. IRS; 3. HealthCare.gov; 4. HealthCare.gov; 5. IRS