Open enrollment for 2027 ACA marketplace coverage runs November 1, 2026 through January 15, 2027 on HealthCare.gov (the federal marketplace used by most states) — confirmed directly by CMS in August 2026 after litigation over a shorter window was resolved in the courts. Enroll by December 15 and coverage starts January 1; enroll between December 16 and January 15 and coverage starts February 1. Some state-run marketplaces use different deadlines, so it’s worth checking yours before you assume the federal dates apply. Below are the exact dates, what’s different for 2027 coverage, and a simple way to build premiums into your monthly budget before enrollment opens.
2027 Open Enrollment: Key Dates
| Milestone | Date | What It Means |
|---|---|---|
| Open enrollment begins | November 1, 2026 | You can start browsing and enrolling in 2027 plans |
| Enroll for Jan. 1 coverage | By December 15, 2026 | Last day to enroll and have coverage start January 1, 2027 |
| Enroll for Feb. 1 coverage | December 16, 2026 - January 15, 2027 | Coverage starts the first of the month after you enroll |
| Open enrollment ends | January 15, 2027 | Final day to enroll or change plans (federal marketplace) |
These are the federal marketplace (HealthCare.gov) dates. State-based marketplaces can run longer: for example, several states extend into late January, and a few go even further — always confirm your specific state’s deadline on your state exchange’s website before relying on the federal date.
What’s Different About 2027 Coverage
A few changes are worth knowing before you shop for a plan this cycle:
- Enhanced premium tax credits are not extended. The temporarily boosted subsidies that applied from 2021 through 2025 have not been renewed for 2027 unless Congress acts before enrollment, so income-based subsidy calculations revert to the original ACA formula. This can mean a meaningfully higher net premium for some households compared to the past few years.
- Premiums are trending higher. Insurers requested a median rate increase in the double digits for 2027 plans, so re-shopping your plan rather than auto-renewing is worth the extra few minutes — a different metal tier or insurer could offset some of the increase.
- Subsidy repayment rules are stricter. If you underestimate your income on your application and receive too large a subsidy, you may now be required to repay the full excess amount at tax time rather than a capped amount, making it more important to estimate your income carefully when you apply.
- Some carriers are exiting certain markets. Check your renewal notice closely — if your current insurer is leaving your area, you’ll be auto-assigned to a similar plan unless you actively choose a different one during open enrollment.
Building Premiums Into Your Monthly Budget
Because 2027 premiums are likely to run higher than what you paid in 2026, it’s worth budgeting for the new amount before your first payment is due rather than adjusting after the fact. A simple approach:
- Get your estimated premium by browsing plans on HealthCare.gov (or your state exchange) once enrollment opens November 1 — this reflects your actual subsidy eligibility for 2027, not last year’s numbers.
- Compare it to what you’re currently paying to see the dollar difference per month.
- Enter your full monthly picture into the budget calculator, including the new premium as a “Needs” expense alongside rent, utilities, and other essentials, to see how it fits against the 50/30/20 framework and whether other categories need to flex.
- If you expect a gap between open enrollment (November-January) and when the new premium actually hits your account, use the savings goal calculator to set aside the difference in advance — for example, saving the increase amount each month from November through January so the higher bill in February doesn’t catch your budget off guard.
A Simple Pre-Enrollment Checklist
- Gather last year’s plan details (insurer, plan name, premium) so you have a baseline for comparison.
- Estimate your 2027 household income as accurately as possible — this determines your subsidy amount, and under the new stricter repayment rules, overestimating your subsidy has a bigger downside than in past years.
- List your regular prescriptions and providers and confirm they’re in-network for any plan you’re considering, especially if your current insurer is one of the ones exiting markets in some regions.
- Note your enrollment deadline (December 15 for January 1 coverage, January 15 for February 1 coverage) and set a calendar reminder a few days ahead of it.
Frequently Asked Questions
What happens if I miss the January 15, 2027 deadline? Outside of open enrollment, you generally can’t enroll in or change an ACA marketplace plan unless you qualify for a Special Enrollment Period, which typically requires a qualifying life event like losing other coverage, moving, marriage, or having a baby.
Do I need to re-enroll if I already have a marketplace plan? Not automatically enrolling is riskier than it sounds this year: if you take no action, most plans will auto-renew, but with premiums and subsidy rules both changing for 2027, actively reviewing and re-selecting your plan is the only way to know you’re getting the best price and coverage for your situation.
Are the extra pandemic-era subsidies available for 2027? No. The enhanced premium tax credits that lowered costs from 2021 through 2025 are not extended for 2027 coverage unless Congress passes new legislation before enrollment. Subsidy calculations for 2027 revert to the original, less generous ACA formula.
Is the open enrollment deadline the same in every state? No. The November 1 - January 15 window applies to HealthCare.gov, used by most states, but several state-based marketplaces set their own, sometimes longer, deadlines. Check your specific state exchange’s website to confirm before assuming the federal date applies to you.
What if I can’t afford my new 2027 premium? Before skipping coverage, compare plans across all available metal tiers (bronze, silver, gold) during open enrollment — a different tier or insurer can sometimes lower your premium meaningfully. You can also revisit your budget with the budget calculator to see where a higher premium might be absorbed elsewhere.
The Bottom Line
Open enrollment for 2027 ACA marketplace coverage runs November 1, 2026 through January 15, 2027 on the federal marketplace (state deadlines may differ), with December 15 as the cutoff for January 1 coverage. With enhanced subsidies gone and premiums trending higher for 2027, re-shopping your plan rather than auto-renewing is worth the effort. Once you have your new premium amount, plug it into the budget calculator to see how it fits your monthly cash flow, and use the savings goal calculator if you want to build up a cushion before the higher bill arrives.