ACA Open Enrollment 2027: The Subsidy Cliff Is Back

If you buy your own health insurance through the ACA Marketplace — whether that's healthcare.gov or a state exchange — 2027 Open Enrollment is going to feel different than the last few years. The extra premium help that made coverage affordable for millions of people between 2021 and 2025 quietly expired, and it wasn't brought back. This is the plain-English breakdown of what changed, who it hits hardest, and what to do before enrollment opens.

Looking for Medicare instead? Medicare runs on its own calendar. Here are the Medicare open enrollment 2027 dates, October 15 through December 7, 2026.

Since the ACA Marketplace opened, premium tax credits have always phased out as income rises. But in 2021, the American Rescue Plan added two big temporary upgrades: it capped everyone's premium contribution at a percentage of income, and — critically — it removed the income cap entirely, so a household earning well above 400% of the federal poverty level could still get help if the benchmark plan cost more than a set share of their income. Those enhancements were extended once, through the end of 2025.

Congress had the opportunity to extend them again before they lapsed. It didn't happen. The enhancements expired on schedule, and the tax and budget legislation passed in 2026 did not restore them. That means the original, pre-2021 subsidy rules are back in force for both 2026 and 2027 coverage — not as a one-year gap, but as the standing rule going forward unless a future Congress acts.

Here's the part that catches people off guard. Under the restored rules, if your household income is at or below 400% of the federal poverty level (roughly $63,000 for a single person, or about $129,000 for a family of four, though the exact line moves each year with the poverty guidelines), you can still qualify for a premium tax credit that scales with income.

But cross that line by even one dollar, and the credit doesn't taper — it disappears completely. A 62-year-old couple two years from Medicare, earning slightly over the cliff, could go from paying a subsidized premium to paying the full, unsubsidized rate overnight — often an increase of hundreds of dollars a month. That abrupt drop-off is exactly what the enhanced credits were designed to smooth out, and exactly what's back for 2027.

Heading into the 2026 plan year, insurers filed some of the largest rate increases the ACA Marketplace has seen in years — an average of roughly 26% nationally, with sharper increases in states that rely on the federal healthcare.gov platform than in states running their own exchanges. Two forces combined to drive that: ordinary medical cost inflation, and insurers pricing in the expectation that fewer, sicker enrollees would stick around once the extra subsidy help went away — a smaller, higher-risk pool tends to push premiums up further.

None of that reverses for 2027. The subsidy cliff isn't a one-time shock that fades — it's the new baseline. Unless your state runs its own exchange with its own added subsidy program (a handful do), the math you're facing this Open Enrollment is the same structural math as last year, just applied to a fresh, generally higher set of premiums.

Mark these now — missing the window means waiting for a Special Enrollment Period, and not everyone qualifies for one.

• November 1, 2026 — 2027 Open Enrollment begins on healthcare.gov and most state exchanges.
• December 15, 2026 — Enroll or change plans by this date for coverage effective January 1, 2027.
• January 15, 2027 — Final deadline to enroll for 2027 coverage (effective February 1 if you sign up after December 15).
• A few state exchanges run longer windows — check your specific state marketplace if you're not using healthcare.gov.

This change doesn't land evenly. It's worth checking your situation carefully if you fall into one of these groups:

• Early retirees and pre-Medicare households (ages 60–64): Marketplace premiums are already highest for older enrollees, so losing subsidy help above the cliff hits this group's budget the hardest.
• Self-employed and gig workers: Income can swing year to year, which makes it easy to accidentally estimate your way over the 400% line and owe back credits at tax time.
• Households near the income cliff: A modest raise, a bonus, or extra freelance income can push you from subsidized to fully unsubsidized without warning.
• People who auto-renewed without shopping: Last year's plan and last year's subsidy estimate may no longer reflect this year's premiums or your current income.

The expiration of the enhanced premium tax credits isn't a headline you can skip past if you buy your own health coverage. It changes the actual math on your bill, brings back a hard income cliff that had been smoothed over for four years, and lands right as 2027 Open Enrollment opens.

The good news: the dates haven't moved, the Marketplace still works the same way to shop and enroll, and free licensed help is still available. The difference this year is that guessing your income or auto-renewing without checking could cost you real money. Run your numbers before you pick a plan.

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