One dollar can cost you everything

How a cliff differs from a phase-out

Most means-tested benefits taper. You earn a little more, you receive a little less, and the incentive to earn stays intact. The premium tax credit does not work that way. The statute sets eligibility at or below 400% of the federal poverty level, and above that line the credit is zero.

The practical consequence is a marginal tax rate that briefly exceeds 100%. Take a 60-year-old couple in a state where the benchmark plan runs around $1,600 a month for the two of them. At $86,460 of income they receive a substantial credit. At $86,660 they receive nothing, and the full annual premium lands on them. Earning $200 more leaves them roughly $14,000 worse off.

The 2027 thresholds

The 400% line is four times the federal poverty level for your household size. Note the year lag: 2027 coverage uses the poverty guidelines published in January 2026.

Why the cliff came back

The American Rescue Plan Act removed the cliff for 2021 and 2022, replacing it with a cap: nobody would pay more than 8.5% of income toward a benchmark plan, at any income level. The Inflation Reduction Act extended that through the end of 2025.

Then the extension ran out. A government shutdown in late 2025 was fought substantially over this question and ended without a deal. The Senate rejected a three-year extension in December 2025. The House passed one in January 2026 by 230 to 196, with seventeen Republicans crossing over, but the Senate never matched it. As of August 2026 nothing has been enacted, and the pre-2021 rules govern.

What actually happened to the people above the line

They left. Households between 400% and 500% of the poverty level were roughly 3% of 2025 sign-ups and accounted for 27% of the entire 2026 enrollment decline, a drop of 44%. More than 320,000 people who had been buying coverage simply stopped.

Across the whole market, plan selections fell from 24,166,491 to 22,973,219, and the number who actually paid a premium fell much further, to about 19.2 million by February. The share of enrollees who paid their first bill dropped from 90% to 83%.

If you are near the line

Levers that reduce modified adjusted gross income

• Deductible traditional IRA contributions. They reduce adjusted gross income directly, and you have until the tax filing deadline to make them.
• Health savings account contributions, if you are enrolled in a qualifying high-deductible plan. These are above-the-line and reduce income dollar for dollar.
• Solo 401(k) or SEP contributions if you are self-employed. The amounts available here are far larger than an IRA and this is often the single most effective lever.
• The self-employed health insurance deduction, which interacts with the credit in a circular way the IRS has a specific worksheet for.
• Timing. Deferring a Roth conversion, a capital gain, or an invoice into the following tax year can be the whole difference.

Levers that do not work

• Contributions to a Roth IRA. They do not reduce your income.
• Itemised deductions such as mortgage interest or charitable giving. Those come after adjusted gross income, so they never touch the calculation.
• Underestimating your income on the application. That is the repayment trap, and since the repayment caps were eliminated it is now considerably more expensive than it used to be.

If you are clearly over the line

Then the exercise changes from optimising a subsidy to buying coverage efficiently without one. That is a different set of questions, and it is covered in what to do when you get no subsidy. For people between 55 and 65 specifically, the early retiree guide goes into the trade-offs in more depth.