ACA Marketplace Open Enrollment 2027: Guide to Rate Changes

ACA Marketplace Open Enrollment for 2027 is approaching, and many consumers are watching proposed premium increases closely. According to an analysis from KFF, insurers have submitted rate filings showing a median proposed premium increase of approximately 15% for 2027.

That number may sound alarming, but it is important to understand what it does, and does not, mean. The 15% figure is a preliminary median based on filings from 276 insurers across all 50 states and the District of Columbia. It is not a guaranteed increase for every plan, state, or household. Proposed rates may change during the review process, and a household’s final premium may also depend on income, household size, location, plan availability, and eligibility for premium tax credits.

The best response is not to panic or assume a specific outcome. Instead, use Open Enrollment as a reminder to review your information carefully, read official Marketplace notices, and check coverage details before making a decision.

This guide explains the key dates for 2027, what the proposed rate increase means, and the practical steps consumers can take to prepare.

ACA Open Enrollment 2027 dates to know

For states using HealthCare.gov, Open Enrollment for 2027 coverage runs from November 1, 2026, through January 15, 2027.

According to the official HealthCare.gov dates and deadlines page:

• November 1, 2026: Open Enrollment begins.

• December 15, 2026: Deadline to enroll in or change a plan for coverage beginning January 1, 2027.

• January 1, 2027: Coverage begins for people who enroll by December 15 and pay any required first premium.

• January 15, 2027: Open Enrollment ends for HealthCare.gov states.

• February 1, 2027: Coverage begins for people who enroll or change plans between December 16, 2026, and January 15, 2027, and pay any required first premium.

State-based Marketplaces may have their own procedures or deadlines. Consumers should check the Marketplace serving their state rather than assuming that every deadline is identical.

Why the December 15 deadline matters

December 15 is especially important for anyone who wants coverage to begin January 1, 2027. Waiting until the end of Open Enrollment may still allow you to obtain coverage for the year, but the effective date may be February 1 instead.

If you have a gap in coverage that you are trying to avoid, mark December 15 on your calendar now. Also allow time to review your information, read notices, examine available coverage, and complete the official Marketplace process.

What the proposed 15% increase means

KFF’s analysis of proposed 2027 ACA Marketplace premium increases reports a median proposed increase of about 15%.

Several words in that statement matter:

• Median: Half of the reviewed proposed changes are above the median and half are below it.

• Proposed: These are preliminary filings, not final prices for every plan.

• Insurers: The figure reflects filings from insurers, not the amount every consumer will pay.

• 2027: The filings relate to the upcoming plan year and may be reviewed or revised.

A proposed increase does not automatically mean that your household’s monthly premium will rise by exactly 15%. Your result may differ based on your county, available carriers, selected coverage, household information, and eligibility for financial assistance.

Likewise, consumers should not assume that a higher proposed premium guarantees a higher final cost or that financial assistance will offset a particular amount. Premium tax-credit eligibility and amounts are based on individual circumstances and official Marketplace calculations.

Why proposed rates can differ from final costs

The rate-filing process involves insurers submitting proposed changes for review. Rates can vary across states, counties, carriers, and coverage offerings. A national median is useful for understanding the general direction of filings, but it cannot predict a specific household’s price.

This is one reason it is important to review the information attached to your own Marketplace account and application. General news coverage can provide context, but official Marketplace notices and plan documents are more relevant to your personal enrollment situation.

Step 1: Update your household and income information

Before reviewing 2027 coverage, gather the information used for your Marketplace application. Do not assume last year’s information is still accurate.

Check whether any of these details have changed:

• Household members

• Filing status

• Address or county

• Employment

• Employer-sponsored coverage

• Expected annual income

• Self-employment income

• Retirement income

• Other income sources

• Eligibility for Medicaid or CHIP

• Loss of other health coverage

• Marriage, divorce, birth, adoption, or other household changes

Income is especially important because Marketplace financial assistance is connected to household and income information. For households with variable income, including freelancers, contractors, commission-based workers, and small-business owners, an annual estimate may require careful attention.

Use reasonable, current information when completing or updating an official Marketplace application. If your circumstances change later, review whether you need to update your application.

eMavio does not determine tax-credit eligibility and does not provide tax advice. Consumers should verify eligibility information through the official Marketplace or with a licensed insurance professional who is authorized in their state.

Step 2: Review tax-credit eligibility carefully

The enhanced premium subsidies that had temporarily expanded assistance have expired. Beginning with 2026 and continuing into 2027, the original ACA structure with a 400% Federal Poverty Level limit has been restored.

This is sometimes called the 400% FPL subsidy cliff. In simple terms, under the original structure, a household above the applicable 400% FPL limit may not qualify for a premium tax credit. The result is not necessarily a gradual reduction. A relatively small change in projected annual household income can affect eligibility under this structure.

This explanation is educational only. It is not a calculation of whether any individual or family qualifies.

Situations that may affect household income

Consumers may want to review income estimates carefully if they expect:

• A raise or bonus

• Additional freelance or contract work

• Business income

• Investment income

• Retirement distributions

• Changes in Social Security income

• A new job

• A job loss

• A change in work hours

• A change in household size

If your projected income changes during the year, update the official Marketplace application as appropriate. Keeping income information current can help reduce the risk of a mismatch between an estimate and final household circumstances.

For additional background, you can read eMavio’s ACA Subsidies 2026: Who Qualifies and How to Protect Savings. That article is also general information and should not be treated as personalized tax or insurance advice.

Step 3: Look beyond the monthly premium

When proposed premiums rise, it can be tempting to focus only on the monthly amount. However, the premium is just one part of a plan’s total cost.

During your review, also look for information about:

• Deductibles

• Copayments

• Coinsurance

• Out-of-pocket maximums

• Prescription costs

• Primary care and specialist costs

• Emergency and hospital cost sharing

• Whether services must be obtained in-network

• Whether referrals are required

• The plan’s provider network

A lower monthly premium does not automatically mean lower overall spending. The right way to evaluate costs depends on your household’s expected healthcare use, financial circumstances, and the specific plan documents available through the official Marketplace.

Consumers should not rely on a single number, headline, or rating. Review the official plan information and consider asking a licensed professional to explain terms you do not understand.

Make a simple annual cost worksheet

A basic worksheet can help organize your research. For each plan you are reviewing, write down:

1. Estimated monthly premium

2. Estimated annual premium

3. Deductible

4. Out-of-pocket maximum

5. Primary care cost

6. Specialist cost

7. Prescription cost information

8. Emergency or hospital cost information

9. Whether your doctors are in-network

10. Whether your medications are covered

This is not a recommendation or a plan comparison provided by eMavio. It is simply an organizational tool for reviewing official plan information.