ACA Open Enrollment Guide: How to Find Affordable Coverage

The Affordable Care Act marketplace is now open for the 2027 coverage year, but shoppers are facing a tougher season: fewer plan options, higher monthly premiums and less federal help. In most states that use the federal HealthCare.gov platform, open enrollment runs from Nov. 1, 2026, through Jan. 15, 2027.

Those higher costs come as many households are still dealing with medical debt. A KFF analysis found that average benchmark silver premiums are rising 13% nationwide for 2027. At the same time, the expanded federal premium tax credits created during pandemic-era relief ended at the close of 2025, which means many enrollees will see much larger monthly bills.

For people who depend on the exchange, this is the main chance to get coverage, reduce out-of-pocket risk or change plans without a qualifying life event. Returning customers should not expect an automatic renewal to offer the same premium, benefits or provider network. Before choosing a plan tier, consumers should compare the full benefits on HealthCare.gov, check whether their doctors and hospitals are still in network, and review how prescriptions are covered.

Why the mid-December deadline matters most

Even though open enrollment continues into mid-January, anyone who wants coverage to begin on New Year’s Day must choose a plan by the middle of December. Meeting that deadline helps prevent an unwanted gap in coverage at the start of the year.

People who sign up after that cutoff and before the end of the enrollment period will still get coverage, but it will not begin until February 1. That delay can be especially costly for anyone managing a chronic illness, upcoming procedure or regular prescription refills, since a one-month gap can create major out-of-pocket expenses.

Enrollment is not complete until the first premium payment is made. The National Association of Insurance Commissioners warns that submitting an application alone does not activate coverage; the policy does not take effect until the insurer receives the initial payment.

Different rules apply in some states

The exact timetable depends on where a person lives. HealthCare.gov sets the schedule in most states, but states that run their own exchanges often use different deadlines, and some give residents more time.

Covered California and the New York State of Health marketplace both allow enrollment through the end of January. Other state-run exchanges, including those in Massachusetts, New Jersey and Washington, D.C., also use their own closing dates and mid-month deadlines for coverage that starts on the first day of the following month. Consumers should use HealthCare.gov, which directs them to their official state exchange, to confirm local deadlines and any state subsidy programs.

When a Special Enrollment Period is available

Missing open enrollment does not necessarily mean waiting until the next cycle to get insurance. Major life changes can trigger a Special Enrollment Period, or SEP, which allows eligible people to enroll in or change a plan outside the standard window.

“Life changes do not follow the federal calendar,” said Dr. Justus Rabach, MD, a clinical physician. “Qualifying events include losing employer-sponsored coverage, getting married, having or adopting a child, or relocating to an area with different coverage options. Typically, you have a 60-day window before or after that event to select a plan.”

The Centers for Medicare & Medicaid Services requires proof, such as a marriage certificate, termination notice or lease agreement, before an SEP is approved. Voluntarily dropping a plan or failing to pay premiums does not count as an involuntary loss of coverage and will not open a special enrollment window.

Medicaid and the Children’s Health Insurance Program operate separately from these rules. People and families who qualify based on income can apply for Medicaid or CHIP at any time during the year.

What to know about higher premiums and changing benefits

The biggest challenge for 2027 shoppers is cost. KFF projects that average benchmark silver premiums will rise 13% nationwide, driven by hospital consolidation, labor costs and higher prescription drug expenses.

The benchmark plan is the second-lowest-cost Silver plan in a given rating area. It is the standard used by the federal government to calculate premium tax credits. When benchmark premiums rise and enhanced subsidies disappear, middle-income households and families with less financial help are hit hardest.

“They may or may not be able to afford to continue to keep their coverage into next year,” said Cynthia Cox, vice president and director of the ACA program at KFF, referring to households caught between higher prices and narrow subsidy limits.

Eligibility rules have also become stricter. With the enhanced subsidies gone, households earning more than 400% of the federal poverty level face a subsidy cliff and lose financial help entirely. In addition, updated federal rules for 2027 impose tighter identity and lawful-presence verification standards for cost-sharing reductions and tax credits for lawfully present immigrants, requiring documents to be submitted quickly to avoid losing coverage or aid.

When comparing plans, look beyond the monthly premium and estimate total yearly costs:

• Deductibles and copays: Low-premium Bronze plans often come with deductibles above $7,000, meaning you may have to pay the full cost of most non-preventive care before insurance starts contributing.
• Drug formularies: Check whether essential prescriptions are placed in low-copay tiers such as Tier 1 or 2, or in higher-cost specialty tiers with coinsurance.
• Provider networks: Make sure your primary care doctor, specialists and nearby hospitals are in network to avoid balance billing.
• Maximum out-of-pocket limits: Review the annual cap so an unexpected hospitalization does not lead to severe medical debt.

The main takeaway

Choosing an ACA plan for 2027 requires active research, not passive auto-renewal. Pick a plan by the middle of December if you need coverage to start on Jan. 1. Review your 2027 summary of benefits to confirm that your prescriptions are still covered and your providers remain in network.

Frequently asked questions

What is the subsidy cliff, and why does it matter for 2027?

The subsidy cliff happens when a household’s income rises above 400% of the federal poverty level. During temporary pandemic-era relief, households above that level could still receive subsidies that limited benchmark premium contributions to 8.5% of income. Since those expanded credits ended at the close of 2025, anyone above that threshold in 2027 must pay the full premium price, creating sharp increases for many middle-income earners.

How can I get free, unbiased help choosing a plan without paying a broker?

Free, unbiased help is available across the country. Unlike commission-based brokers, certified marketplace Navigators offer neutral guidance to help you calculate actual subsidies and compare plan levels. You can find one through the “Find Local Help” tool on HealthCare.gov or by visiting a local Federally Qualified Health Center.

Citations

McGough M, Wallace R, Lo J, Pestaina K, Cox C. 9 Things to Watch for the 2027 ACA Open Enrollment Period. KFF.

Healthcare.gov. Official Marketplace Dates and Deadlines. HealthCare.gov.

NAIC. Insured, But No Proof. NAIC.

McGough M, Lo J, Cox C. Individual Market Enrollment Continues to Fall Through Mid-2026. KFF.