The 400% Cliff Is Back — And It Changes Everything for Early Retirees

For four years, there was no income ceiling on marketplace subsidies. If your premium for a benchmark plan exceeded 8.5% of your income, you got help, whether you earned $60,000 or $160,000. That structure came from the American Rescue Plan, was extended by the Inflation Reduction Act, and expired on December 31, 2025.

Subsidies reverted to the pre-2021 rules on January 1, 2026. If you retired before 65 and buy your own coverage, this is the single most important change to your finances this year, and most people I talk to have not run the numbers yet.

What actually changed

Two things changed at once. Most people only notice the second one.

First, everyone below 400% of the Federal Poverty Level now pays a higher percentage of their income toward the benchmark plan. Under the enhanced credits, a household at the low end paid nothing. For 2027 coverage the scale starts at 2.15% of income at the bottom and rises to 10.22% for households between 300% and 400% of the Federal Poverty Level.

Second, and this is the one that hurts: above 400% of the Federal Poverty Level, the subsidy is gone. Not reduced. Gone.

Why it is called a cliff

Most tax provisions phase out. You earn more, the benefit shrinks gradually, and there is no single dollar that matters more than any other. The premium tax credit does not work that way.

At exactly 400% of the Federal Poverty Level, you pay a set percentage of your income for the benchmark silver plan and the credit covers the rest. At 400.01%, you are not an eligible taxpayer at all. There is no reduced credit at that income. The formula simply stops applying.

The cliff is steepest if you are in your late fifties or early sixties. Premiums are allowed to rise with age at up to a three-to-one ratio, so an unsubsidized plan costs an older couple far more than a younger one. But the 400% threshold does not move with age. The older you are, the further you fall.

The part that is genuinely new: repayment

This is where people get hurt, and it is the piece almost nobody has absorbed.

When you enroll, you estimate your income for the coming year. The marketplace advances the credit each month based on that estimate. At tax time you reconcile the estimate against what you actually earned, on IRS Form 8962.

Through tax year 2025 there were caps on how much you had to repay if you underestimated — a few hundred to a few thousand dollars, depending on income and filing status. Those caps no longer exist.

The One Big Beautiful Bill Act repealed the repayment limitation for tax years beginning after December 31, 2025. The IRS puts it plainly: for tax years after 2025, you repay the full amount by which your advance payments exceed the credit you actually qualified for.

So there is now no ceiling at any income level. Not just above 400% — anywhere. A household at 180% of the Federal Poverty Level that underestimated repays every excess dollar, exactly like a household at 420%.

Not the difference between what you got and what you should have gotten. The whole thing. Twelve months of subsidy, added to your tax bill in one line.

Why this catches careful people

The households most exposed here are not careless. They are the ones doing sensible financial planning.

You enroll in November projecting income at 370% of the Federal Poverty Level. In December your advisor suggests a Roth conversion, because your bracket is low this year and it makes sense over a thirty-year horizon. Or a fund throws off an unexpected capital gain distribution. Or you sell a rental property. You land at 405%.

Every one of those is a defensible decision on its own. Any one of them can cost you the entire year's subsidy, and you find out in April.

Note that tax year 2026 — the return you file in early 2027 — is the first reconciliation under both the restored cliff and the repealed caps. If last spring went smoothly, that was the old system. It tells you nothing about what is coming.

What to do

Three things, in order.

First, find out where the line actually is for your household size. It is a specific dollar figure, not a vague zone, and you should know it the way you know your mortgage payment.

Second, project your income for the year honestly, including the things that are easy to forget: capital gains, distributions from a traditional IRA or 401(k), and tax-exempt interest, which counts here even though it is tax-free everywhere else.

Third, if you are anywhere close to the line, talk to whoever prepares your taxes before you make any December moves. The order in which you take income matters more now than it has in five years.

One option worth knowing about: you can take less advance credit than you qualify for, or none at all, and claim it when you file instead. That turns an unpredictable April liability into a refund. It costs you cash flow during the year, and for households near the line it is often the right trade.

If you want to see roughly where you stand before you call anyone, run your numbers through the estimator below.