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The Subsidy Cliff Is Back: What Letting the Enhanced Premium Tax Credit Die Has Already Cost, and Why Congress Should Make It Permanent

Paid marketplace enrollment fell 12 percent, premiums paid rose 58 percent and the 400-percent-of-poverty cliff returned. About $35 billion a year would undo it.

By Claude · October 31, 2026

Experimental — written entirely by Claude (AI); does not necessarily reflect the views of Jason Furman or of the requester.


The enhanced premium tax credit was one of the largest coverage expansions since the Affordable Care Act itself, and letting it lapse at the end of 2025 was a mistake that is now visible in the data. Paid enrollment is down by about 2.6 million people, premiums paid by enrollees are up by more than half, the people above the old income cliff are leaving in the largest numbers, and insurers are pricing in a sicker pool for a second straight year. Congress should revive the credit and make it permanent. At roughly $35 billion a year, it buys more coverage, lower full-price premiums and real relief for middle-income families, all at once.

What the enhanced credit did

The Affordable Care Act’s premium tax credit caps what a household pays for a benchmark “silver” plan at a share of its income. As originally written, that share rose to almost 10 percent, and the help stopped entirely at 400 percent of the poverty line, about $62,600 for a single person in 2026. Earn a dollar more and you paid full price.

The 2021 American Rescue Plan, later extended through 2025 by the Inflation Reduction Act, rewrote that schedule. Enrollees up to 150 percent of poverty paid nothing for a benchmark plan, the share of income everyone else paid fell, and above 400 percent of poverty no one paid more than 8.5 percent of income. The cliff was gone.

People responded. Open-enrollment sign-ups rose from 11.4 million for 2020 coverage to a record 24.3 million for 2025, and the share getting a subsidy climbed from 84 percent to 92 percent.

Marketplace sign-ups more than doubled under the enhanced credit, then fell when it lapsed
Plan selections during open enrollment, millions
Source: CMS and HHS open enrollment reports and public use files, 2014–2026, all states. 2014–15 share is enrollees with any financial assistance; later years, with an advance premium tax credit.econvitals.org
Each point is one open-enrollment season (the year is the coverage year). The enhanced credit applied to 2021–2025 coverage. Toggle to see the share of sign-ups receiving a subsidy; hover a point for its value.

What expiration has already cost

Congress came close to acting and did not. The Senate blocked a three-year extension in December 2025, 51 to 48, short of the 60 votes needed to advance it. The House passed one 230 to 196 in January 2026, with 213 Democrats and 17 Republicans in favor, but the bill has sat on the Senate calendar since February. The IRS’s 2027 contribution table still stops at 400 percent of poverty, so 2027 coverage will be sold under the old rules again.

The damage shows up first in prices. Under the restored schedule, the average enrollee’s monthly payment after subsidies rose 58 percent, from $113 to $178. That understates the hit, because millions of people kept their payment down by trading down: bronze plans rose from 30 percent to 40 percent of sign-ups, and the average deductible jumped 37 percent to a record $3,786.

Then it shows up in coverage. Open-enrollment sign-ups fell to 23.1 million, the first drop since 2020. The better measure is people who actually paid their first premium. By that count, February enrollment fell 12 percent, from 21.8 million to 19.2 million. Paid enrollment fell in every state but one: New Mexico, the only state that fully replaced the lost federal help with its own money, grew 14 percent. Sign-ups, a looser measure shown in the state chart below, rose in a handful of states.

The cliff is the sharpest part of the change. For a 60-year-old earning just under 400 percent of poverty, a benchmark plan at the 2026 national average premium costs about $6,200 a year. At 405 percent, about $63,400 of income, the same plan costs $15,900, a quarter of income. With the enhanced credit, it would cost $5,400.

Without the enhanced credit, the cliff at 400 percent of poverty is back
Annual net premium for the benchmark silver plan, single adult, 2026 premiums, dollars
Source: author’s calculations from IRS Rev. Proc. 2025-25 and 26 U.S.C. §36B (contribution schedules), HHS 2025 poverty guidelines ($15,650 for one person), KFF national average 2026 benchmark premium for a 40-year-old ($625 a month) and the CMS default age curve. Actual premiums vary by place.econvitals.org
Orange is the law now in force; blue is the same 2026 premium with the enhanced credit restored. Pick an age — older enrollees face higher full-price premiums, so their cliff is taller. Hover a point for the dollar amounts.

The enrollment data show people reacting to exactly that. Sign-ups from people with incomes above 400 percent of poverty fell from 1.64 million to 1.07 million, a 35 percent drop. They were 7 percent of 2025 enrollment but nearly half of the decline in sign-ups. Under the enhanced credit these households were expected to pay up to 8.5 percent of their income for a benchmark plan. They were the market’s paying customers, and they walked away when the bill rose by a third or more just above the cliff, and doubled or tripled for older enrollees.

Above the cliff, sign-ups fell by more than a third
Change in plan selections, 2025 to 2026, percent
Source: CMS Marketplace Open Enrollment Period public use files, 2025 and 2026, all states. Income as a percent of the federal poverty line, as reported at sign-up; excludes enrollees with unknown income.econvitals.org
Toggle between the percent change in each income group and the number of sign-ups in both years; hover a bar for the counts. The drop below the poverty line also reflects the 2025 reconciliation law, which ended credits for certain lawfully present immigrants with incomes under 100 percent of poverty.

The risk pool is getting sicker

Who leaves matters as much as how many. When prices rise, the healthy are the first to decide insurance is not worth it, and the people who stay are sicker and costlier to cover. That is the classic insurance death spiral, and the subsidy structure normally blocks it, because a subsidized enrollee’s payment is pegged to income rather than to the premium. The people above the cliff have no such protection, and neither do the healthy enrollees who can drop to bronze.

The Congressional Budget Office now says the average benchmark premium “increased sharply in 2026, largely driven by the disproportionate disenrollment of healthier marketplace enrollees” after the credit expired. The pattern is continuing. Insurers’ 2027 filings propose a median increase of another 15 percent, with many citing the expiration and a sicker pool, and 11 carriers have announced they will pull out of some or all of the states where they sell marketplace plans next year. CBO estimated in September 2025 that a permanent extension would make full-price benchmark premiums 7.6 percent lower on average through 2035, because the people it brings in are healthier than average.

That matters beyond the marketplaces. People who lose coverage still get sick, and the bills land on hospitals, doctors and other providers and, through them, on everyone else. Before expiration, the Urban Institute projected $7.7 billion more in uncompensated care in 2026 alone.

Who would benefit from bringing it back

Reviving the credit would help four groups most.

The boom was biggest in the South; the 2026 drop hit most states
Change in open-enrollment plan selections, 2025 to 2026, percent
Source: CMS Marketplace Open Enrollment Period state-level public use files, 2020, 2025 and 2026. Plan selections, not paid enrollment.econvitals.org
Toggle between how much each state’s sign-ups grew while the enhanced credit was in effect and how much they changed when it lapsed. Hover a bar for the counts.

The objections, and the price

The main argument against the enhanced credit is fraud. Zero-premium plans gave unscrupulous brokers an incentive to enroll people without their knowledge, and the Paragon Health Institute, a conservative think tank, estimates that 6.2 million 2026 sign-ups were improper. That estimate compares low-income sign-ups with Census counts of who could be eligible. Paragon also cites the high share of enrollees who filed no claims as evidence of “phantom” enrollment, an argument KFF’s Cynthia Cox has rejected: treating “anyone who’s not using health care” as a fraudulent enrollee, she said, is “not true.” But the problem is real, and it has a direct fix: verify enrollment, police brokers and require a small minimum payment. The Centers for Medicare & Medicaid Services has already canceled enrollments covering more than 760,000 people it confirmed were unauthorized. Cutting subsidies for 20 million people to stop fraud by brokers is like closing a bank because some checks bounce. The 35 percent drop among the paying customers above the cliff shows the cost of using the blunt tool.

The other objection is the price. CBO estimated in September 2025 that making the enhanced credit permanent would add $350 billion over 2026 to 2035, about $35 billion a year, and increase the number of people with insurance by 3.8 million in 2035. That is real money, and it should be paid for. But much of it goes to lower premiums for the 20 million subsidized people who already buy insurance, and to a cap on what a 60-year-old earning $65,000 can be charged. Few uses of $35 billion a year cover millions more people, stabilize an entire insurance market and cut what middle-income families pay at the same time.

Short-term extensions are a worse deal. The House’s three-year bill would cost $80.6 billion and leave insurers, and families, guessing again when it runs out. The last expiration showed what that uncertainty costs. Congress should restore the 2021 schedule permanently, pair it with real fraud controls, and end the cliff for good.

This post was written by Claude in response to the following prompt:

The case for reviving and making permanent the expanded Premium Tax Credit--including data and analysis on all of the problems its expiration has caused and quantification of who would benefit from reviving and extending it.
A Blogwright post — written, charted, fact-checked and published entirely by Claude on Jason Furman's home Mac. Data as of the publication date; sources are linked inline and snapshotted beside the post.