ACA Open Enrollment for 2027: Dates, Premium Changes, and What to Check Before You Enroll

Open Enrollment for 2027 Coverage Opens Today

Open enrollment for 2027 health coverage on HealthCare.gov runs from November 1, 2026 to January 15, 2027.

The date you enroll decides when your coverage starts:

• Enroll by December 15, 2026: coverage generally starts January 1, 2027.
• Enroll December 16, 2026 to January 15, 2027: coverage generally starts February 1, 2027.

State-run marketplaces may use different dates and deadlines, so shoppers in those states should check their own marketplace rather than assuming the HealthCare.gov calendar applies.

Why 2027 Premiums Are Higher

According to a KFF analysis published October 30, 2026, based on newly released federal plan data, benchmark Silver plan premiums will cost 13% more on average in 2027. The benchmark Silver plan is the second-lowest-cost Silver plan in an area, and federal subsidies are pegged to it — so a rise in the benchmark does not mean every person’s premium rises by the same amount, but it is the reference price that matters for subsidy calculations.

CMS’s Plan Year 2027 Marketplace Plans and Prices Fact Sheet, also dated October 30, 2026, says more than 75% of HealthCare.gov shoppers will still have access to premiums at or below $50 a month after tax credits. CMS did not give an average premium change in that fact sheet.

Two background changes help explain the pressure on 2027 prices:

• Enhanced federal premium tax credits expired at the end of 2025. This is the second year of marketplace coverage without that enhanced help.
• The original ACA subsidy rules apply again for 2027 coverage, including a hard income cutoff — sometimes called the subsidy cliff — which can change what some households pay by thousands of dollars depending on income.

What This Means for Revenue Cycle Management

Open enrollment is not only a consumer deadline. For providers, billing teams, and RCM staff, it is an eligibility and patient-responsibility checkpoint:

• Verify coverage early, not at the first visit. A patient who enrolls in December for a February 1 start date is not covered under the new plan in January. Eligibility verification should confirm the plan, the coverage start date, and cost-sharing before services are scheduled.
• Expect more price questions. With benchmark premiums up and subsidy rules changed, patients are more likely to ask what a plan covers, what their deductible is, and what they will owe. Clear pre-service estimates reduce surprise bills and downstream denials.
• Watch for plan changes, not just new enrollments. Existing enrollees who do not actively shop may be auto-renewed into a different plan or premium. Re-verifying returning patients at the start of the year is as important as verifying new ones.
• Document the plan details that affect claims. Plan name, member ID, coverage dates, and prior authorization requirements should be captured at intake, so claims are not submitted to a plan that was not in effect on the date of service.

For the wider revenue cycle picture, see What Is RCM in Healthcare? and our guide to insurance verification in healthcare.

A Practical Checklist Before Choosing a 2027 Plan

1. Confirm the deadline for your state. HealthCare.gov runs November 1, 2026 to January 15, 2027, with December 15 for January 1 coverage. State-run marketplaces may differ.
2. Compare the total cost, not just the monthly premium. Look at the deductible, copays, coinsurance, and out-of-pocket maximum, especially if you expect regular care or prescriptions.
3. Check whether your doctors, hospitals, and prescriptions are in network. A lower premium can cost more overall if your regular providers are out of network.
4. Recalculate your subsidy, don’t assume last year’s amount. With enhanced credits expired and original ACA rules back, last year’s subsidy is not a reliable guide for 2027.
5. Note the coverage start date. If you enroll after December 15, your coverage generally starts February 1, 2027 — plan any January care accordingly.
6. Keep proof of enrollment. Save the enrollment confirmation, plan documents, and member ID, and share them with your provider’s front desk at your next visit.

Frequently Asked Questions About ACA Open Enrollment 2027

When is ACA open enrollment for 2027?

On HealthCare.gov, November 1, 2026 to January 15, 2027. Enroll by December 15, 2026 for coverage starting January 1, 2027; enrollments from December 16 to January 15 generally start February 1, 2027.

Why are premiums rising for 2027?

KFF’s October 30, 2026 analysis puts the average benchmark Silver premium rise at 13%, following the expiration of enhanced federal premium tax credits at the end of 2025. Your own premium depends on where you live, your age, your income, and the plan you choose.

Do I need to do anything if I already have a marketplace plan?

Yes, at minimum check your renewal notice. Your plan, premium, and subsidy may have changed for 2027, and actively comparing plans during open enrollment is the one time each year most people can change plans without a special life event.

What if I miss January 15, 2027?

After January 15, you generally need a special enrollment period — for example, a qualifying life event — to enroll or change plans. Check HealthCare.gov or your state marketplace for the qualifying events and deadlines that apply.

The Bottom Line

Open enrollment for 2027 is a short window with a hard December 15 deadline for January 1 coverage, higher benchmark premiums, and changed subsidy rules. The most expensive mistake is not shopping at all — it is assuming last year’s plan, premium, and subsidy still apply.

For patients, the action is simple: compare plans before December 15, check networks and total costs, and confirm the coverage start date. For healthcare teams, the action is equally clear: re-verify eligibility and coverage dates for every patient at the start of the year, before the first claim goes out.

Further reading on Ranking Bridge:

• What Is RCM in Healthcare?
• What Is Insurance Verification in Healthcare?
• What Is Denial Management in Medical Billing?

Sources checked November 1, 2026:

• KFF analysis of 2027 benchmark Silver premiums, published October 30, 2026, as reported October 30–31, 2026.
• CMS Plan Year 2027 Marketplace Plans and Prices Fact Sheet, October 30, 2026.
• HealthCare.gov open enrollment dates and deadlines for 2027 coverage: November 1, 2026 to January 15, 2027; December 15, 2026 for January 1, 2027 coverage.

This article is general information about health coverage enrollment. It is not personal insurance, financial, or medical advice. Plan availability, premiums, subsidies, and deadlines vary by state and household circumstances — check HealthCare.gov or your state marketplace for the details that apply to you.