No More ACA Repayment Caps: Your Income Estimate Matters

Imagine you retired at 58 and bought a marketplace plan. When you enrolled, you made your best guess about next year's income. It felt like a forecast, and forecasts are allowed to be a little off. For many households, that was true in a practical sense, because the tax code limited how much of an overpaid subsidy had to be returned.

For the 2026 tax year, that cushion is gone. This article walks through what changed, which income counts, a hypothetical example of an estimate that goes wrong, and the levers some early retirees consider. It is general education, not personal advice.

Marketplace subsidies, called the premium tax credit, are usually paid in advance directly to your insurer each month. The amount is based on the income you estimate when you enroll. After the year ends, you file IRS Form 8962 with your tax return to reconcile what you received against what you actually qualified for based on your real income.

If the advance payments were larger than your final credit, the difference is the excess advance premium tax credit. In prior years, the amount a household had to repay was limited for many filers whose income was under 400% of the federal poverty level. As KFF has reported, starting with the 2026 tax year those limits no longer apply. A household that underestimates its income may owe back the full excess when it files in early 2027.

Think of it like a utility company's budget billing plan. You pay a steady amount based on a guess about usage, and at year-end the real usage is tallied. The difference is that the old rules rounded off the size of a surprise bill. The new rules do not.

Why does this matter more for early retirees? Many have income they control to a degree, such as IRA withdrawals, conversions, and asset sales. That flexibility is useful, but it also means income can jump in ways a January estimate did not anticipate. For context on the income threshold itself, our post on the ACA subsidy cliff covers how the 400% of poverty level line works. Federal poverty figures and eligibility rules are published at HealthCare.gov and should be checked each year.

Marketplace eligibility uses modified adjusted gross income (MAGI). For premium tax credit purposes, that is generally your adjusted gross income plus a few add-backs, including tax-exempt interest, certain foreign income, and the non-taxable portion of Social Security benefits (see IRS Form 8962 instructions and HealthCare.gov). It is not the same as your taxable income, and it is not the same as the spending you do in retirement.

Here are common items for early retirees, and how they generally show up:

• Roth conversions: The amount converted from a traditional IRA or 401(k) to a Roth is taxable income in the year of conversion, so it generally raises MAGI.
• Capital gains: Gains from selling investments in a taxable account are part of AGI. Long-term gains taxed at 0% or 15% for income tax purposes still count toward marketplace MAGI. Qualified dividends and capital gain distributions from funds count too.
• Traditional IRA and 401(k) withdrawals: Pre-tax distributions are taxable income and count in full.
• Social Security benefits: For marketplace purposes, the full amount of benefits is generally counted, including the portion that is not taxed on your federal return. This surprises many people, because the taxable share on Form 1040 can be much smaller than the total received.
• Tax-exempt interest: Municipal bond interest is not taxed federally, but it is added back for MAGI.

Some items generally do not raise MAGI. Qualified withdrawals of Roth contributions and earnings after meeting the rules, and withdrawals of money you already paid tax on (such as basis in a taxable account), are common examples. The details depend on each account, so a tax professional can confirm how a specific item is treated.

A frequent misconception is that only wages matter, so a retiree with no paycheck has little income to report. In reality, the items above can add up quickly even with no job.

This is a fictional, illustrative example only. The numbers are simplified and are not predictions or advice.

Consider a hypothetical couple, Dana and Chris, both 60 and retired, enrolling in marketplace coverage for 2026. In the fall they estimate their income at $60,000, made up of IRA withdrawals and some interest. Based on that estimate, they receive advance premium tax credits totaling $12,000 over the year (a round figure chosen for the example).

Then life happens:

• In June, they sell appreciated shares to fund a home project, creating $14,000 of capital gains.
• In November, they complete a $20,000 Roth conversion they had been considering.

Their actual MAGI becomes roughly $94,000. For a two-person household, 400% of the 2025 federal poverty guideline ($21,150 for two people, used for 2026 coverage) is about $84,600. With income above that line, they would no longer qualify for any premium tax credit under the current rules, and the full $12,000 of advance payments becomes excess. Because the repayment limits no longer apply, they may owe all of it when they file in early 2027.

Under the earlier rules, a household below 400% of poverty would typically have had a ceiling on repayment. This couple was never going to be protected by a cap here, since they crossed the line, but the broader point is that the removal of caps means even smaller misses, such as landing a few thousand dollars over a threshold in the credit schedule, can produce a much larger bill than before.

Notice what drove the problem. The salary did not change. Two discretionary events, a sale and a conversion, did, and neither was in the original estimate.

There is no single approach, and each carries trade-offs. These are options that some early retirees and their advisers discuss.

1. Updating the marketplace when income changes. The marketplace lets you report changes to your expected income during the year, which can adjust future advance payments. Some households revisit their estimate after major events like a large sale, a business windfall, or a change in Social Security claiming. The trade-off is that a lower advance credit means a higher monthly premium, but a smaller chance of a large bill later.

2. Timing conversions and gains. Because Roth conversions and capital gains are largely discretionary, the calendar matters. Some households spread conversions across years, bunch income into a year when they do not need marketplace subsidies (for example, the year they move to Medicare), or sequence sales so that income is known before year-end. Our look at the year-end Roth conversion window explains why timing carries weight. Keep in mind that conversions cannot be undone, so the tax and subsidy effects are worth understanding before the transaction.

3. Using HSA and traditional IRA contributions. Contributions to a Health Savings Account (if you are eligible, which generally requires a qualifying high-deductible plan) and deductible traditional IRA contributions can reduce AGI, and therefore MAGI. Both are subject to annual IRS limits and eligibility rules, and a deductible IRA contribution depends on factors like workplace plan coverage and income. For more on how HSAs work, see our HSA vs FSA comparison. Contributions also tie up money, so liquidity is a factor to weigh.

4. Building a buffer. Some households deliberately aim for an estimate below a threshold with room to spare, or set aside cash in case of a repayment. The cost is possibly leaving some credit unused, which is a trade-off against bill risk.

Plan selection and enrollment details are covered in our ACA open enrollment shopping checklist for early retirees.

The headline is simple. When the repayment limits disappeared, the income estimate stopped being a rough guess with a soft landing and became a figure with real financial consequences. For households with variable income, that may mean checking the estimate more than once a year, understanding which transactions count, and keeping records of mid-year changes.

Useful starting points for further reading include the IRS Form 8962 instructions at irs.gov, the premium tax credit pages at HealthCare.gov, and KFF's explainers on the end of repayment limits.

Disclaimer: This article is general education only. fidser. is not a registered investment adviser, certified financial planner, or tax professional, and nothing here is personalized financial or tax advice. Rules, thresholds, and eligibility can change and depend on individual circumstances. Please consult a qualified financial planner, tax professional, or adviser before making any financial decisions.