When Is Open Enrollment 2026? Marketplace Dates, Deadlines, and What to Do

Open Enrollment for 2026 Marketplace health coverage runs November 1, 2025 through January 15, 2026 on HealthCare.gov and in every state that uses the federal site (<a href="https://www.healthcare.gov/quick-guide/dates-and-deadlines/">Source: HealthCare.gov, 2025</a>). That 10-and-a-half-week window is the once-a-year chance for most Americans without job-based coverage to enroll in an ACA plan, switch plans, or update the information that determines their premium tax credit. If you live in a state that runs its own exchange — California, New York, Massachusetts, and roughly 17 others — the dates are usually similar but not identical, and your state's site is the source of truth.

Two coverage-start milestones sit inside that window, and they catch a lot of people off guard. Enroll (or change plans) by December 15, 2025, and your 2026 coverage starts January 1, 2026. Enroll between December 16, 2025 and January 15, 2026, and your 2026 coverage starts February 1, 2026 (<a href="https://www.healthcare.gov/quick-guide/dates-and-deadlines/">Source: HealthCare.gov, 2025</a>). If you need coverage on day one of the new year, December 15 is the deadline that matters. January 15 is the last day to enroll for the year, not the last day to start on January 1.

The 2026 Open Enrollment dates for the federal Marketplace

HealthCare.gov is the federal Marketplace used by 30-plus states. For 2026 coverage, the window is November 1, 2025 through January 15, 2026, and the dates have been the same recurring window for several plan years (<a href="https://www.healthcare.gov/quick-guide/dates-and-deadlines/">Source: HealthCare.gov, 2025</a>). The Centers for Medicare & Medicaid Services (CMS) sets the federal window each year; it does not shift around based on the calendar.

The two coverage-start rules inside that window are worth memorizing. Enroll or change plans by 11:59 p.m. local time on December 15, 2025, and your 2026 coverage begins January 1, 2026. Enroll or change plans between December 16, 2025 and January 15, 2026, and your 2026 coverage begins February 1, 2026 (<a href="https://www.healthcare.gov/quick-guide/dates-and-deadlines/">Source: HealthCare.gov, 2025</a>). Plan effective dates are also the trigger date for your first premium bill, so timing your enrollment by a week can change the date your coverage is actually in force.

Which states use HealthCare.gov vs. a state-based exchange

Roughly two-thirds of states use the federal HealthCare.gov site. The other 20-ish states and the District of Columbia run their own exchanges, sometimes called State-Based Exchanges (SBEs), with their own websites, application flows, customer service lines, and Open Enrollment windows. The well-known state-run sites include Covered California, NY State of Health, Massachusetts Health Connector, MNsure, Get Covered NJ, HealthSource RI, Vermont Health Connect, Access Health CT, Maryland Health Connection, DC Health Link, Connect for Health Colorado, Washington Healthplanfinder, OregonHealthCare.gov, Nevada Health Link, Your Health Idaho, Pennie, Kynect, CoverME, beWellnm, and Virginia's Marketplace. If you live in any of those states, you'll apply and shop on that state's site — not HealthCare.gov — and your state's 2026 Open Enrollment dates apply.

The federal November 1 – January 15 window is the most common, but a number of state-based exchanges push their final deadline a week or two past January 15, and a few open a little earlier. Rather than restate 2026 dates that may shift in the months before they open, the safest rule is: <strong>verify your 2026 dates on your state's exchange homepage</strong>. The research brief behind this article flagged the state-by-state dates as needing annual verification; the official state page will have the dates your application will actually use.

• If your state is on HealthCare.gov, your 2026 Open Enrollment is November 1, 2025 – January 15, 2026.
• If your state runs its own exchange (Covered California, NY State of Health, Massachusetts, New Jersey, and others), the dates are similar but not identical — check your state's homepage.
• If you moved states recently, you may also qualify for a Special Enrollment Period tied to the move — see the <a href="/glossary/qualifying-life-event-qle">qualifying life event</a> glossary entry.
• If your income is at or below 138% of the Federal Poverty Level (FPL) in a Medicaid-expansion state, you may be routed to Medicaid instead of a Marketplace plan — see our explainer on <a href="/blog/medicaid-expansion-states-2026">Medicaid expansion</a>.

When does 2026 coverage actually start?

The short answer is: it depends on which deadline you meet. The federal Marketplace splits the 10-and-a-half-week Open Enrollment window into two coverage-start groups (<a href="https://www.healthcare.gov/quick-guide/dates-and-deadlines/">Source: HealthCare.gov, 2025</a>):

1. Enroll by December 15, 2025 → 2026 coverage starts January 1, 2026.
2. Enroll December 16, 2025 – January 15, 2026 → 2026 coverage starts February 1, 2026.

There is no third milestone. If you enroll on January 14, your coverage still starts February 1, not January 15. If you enroll on January 16 (one day after the deadline), you cannot get 2026 coverage through Open Enrollment — you'd need a <a href="/glossary/special-enrollment-period-sep">Special Enrollment Period</a> based on a qualifying life event, or you'd have to wait for the next plan year's Open Enrollment. State-based exchanges have their own coverage-start rules; check the date you enroll against the date on your state's site.

What if I miss the January 15 deadline?

Missing Open Enrollment is not the end of the road, but it does mean you cannot freely pick a plan. After January 15, 2026, you can only enroll or change Marketplace plans if you qualify for a Special Enrollment Period, which is a 60-day window that opens when you have a qualifying life event (<a href="https://www.healthcare.gov/coverage-outside-open-enrollment/your-options/">Source: HealthCare.gov, 2025</a>). Common qualifying life events include losing job-based coverage, getting married or divorced, having or adopting a baby, moving to a new ZIP code or state, gaining citizenship or lawful presence, and certain income changes that affect your subsidy eligibility. A complete list lives on the HealthCare.gov qualifying life events page.

Two year-round options also exist, and they are not the same as Marketplace Open Enrollment. <a href="/glossary/medicaid">Medicaid</a> and the Children's Health Insurance Program (CHIP) accept applications at any time, and eligibility is based on income, household size, and (for adults) whether your state expanded Medicaid. If your income is too low to qualify for a Marketplace plan with subsidies, Medicaid may be a better fit. The other year-round path is employer-sponsored coverage: if you or a family member has access to job-based insurance, that plan is typically available at hire, during a waiting period, and during a Special Enrollment Period tied to life events — the same life events that unlock a Marketplace SEP.

Do I need to do anything to keep my 2025 plan for 2026?

If you already had a 2025 Marketplace plan, you should receive two re-enrollment letters by November 1, 2025 — one from the Marketplace and one from your insurance company (<a href="https://www.healthcare.gov/keep-or-change-plan/notices/">Source: HealthCare.gov, 2025</a>). Those letters explain any changes to your 2026 plan, the new premium, and the new subsidy amount (if any). Read them, because a plan that worked in 2025 may have changed its provider network, drug formulary, or copays for 2026.

If you take no action during Open Enrollment, HealthCare.gov may auto-enroll you in a 2026 plan — usually the same plan, or a similar one if your 2025 plan is not being offered in 2026 (<a href="https://www.healthcare.gov/keep-or-change-plan/auto-enrollment/">Source: HealthCare.gov, 2025</a>). Auto-enrollment keeps you covered, but it does not always preserve your full premium tax credit or your cost-sharing reductions, especially if your 2026 projected income has changed. The safer move is to log in, update your application, and either confirm or change your plan — that way the subsidy is recalculated against your actual 2026 estimate, and you do not end up with a surprise bill at tax time.

What to have ready before you enroll

The application itself runs 30 to 45 minutes for most people, and you'll need the same handful of documents each year. Have these ready before you start so the screen does not time out and lose your place:

• Social Security numbers (SSNs) for every person on the application, including children.
• Document numbers for any lawfully present non-citizen family members (e.g., Alien Registration Number / I-766 or I-551).
• An income estimate for 2026 — most people use last year's modified adjusted gross income (MAGI) as a starting point and adjust for known changes.
• Employer information and an offer-of-coverage form (Form 1095-C, if you received one) for any household member with job-based insurance, since access to affordable job-based coverage affects subsidy eligibility.
• Current Marketplace plan information, including the plan ID, if you are switching or comparing.
• A list of the doctors, prescriptions, and preferred hospitals you want to keep — you'll need this to compare networks, not just premiums.

Our companion guide on <a href="/blog/documents-needed-to-apply-for-marketplace">documents needed to apply for Marketplace coverage</a> walks through each item, and the step-by-step piece on <a href="/blog/how-to-enroll-in-marketplace-step-by-step">how to enroll in the Marketplace</a> shows what the application screens actually ask for. If you are unsure whether you qualify for a premium tax credit, the brief on <a href="/blog/what-happens-if-i-miss-open-enrollment">what happens if you miss Open Enrollment</a> covers the SEP fallback in more detail. Our team at FindMyHealthQuote tracks these state-level changes each year so we can show you what's available where you live.

Quick checklist for Open Enrollment 2026

• Mark November 1, 2025 – January 15, 2026 on your calendar (verify with your state if you live in a state-based exchange).
• Watch for the two re-enrollment letters that should arrive by November 1.
• Log in to your Marketplace account, update your 2026 projected income, and review the plans available in your ZIP code.
• Compare at least three plans side by side — premium, deductible, out-of-pocket maximum, copays for the care you actually use, and which of your doctors are in-network.
• Enroll by December 15, 2025 if you need coverage starting January 1, 2026. Enroll by January 15, 2026 if you can wait until February 1.
• Pay your first month's premium on time. Enrolling in a plan is not the same as activating coverage — most insurers require payment before the coverage effective date.
• If you miss the January 15 deadline, check whether you qualify for a Special Enrollment Period, and apply for Medicaid year-round if your income fits.

Frequently asked questions

Frequently asked questions

When is Open Enrollment for 2026 health insurance?

On HealthCare.gov, Open Enrollment for 2026 coverage runs November 1, 2025 through January 15, 2026. State-based exchanges set their own windows — most are similar, but several extend past January 15. Check your state's exchange homepage for the exact 2026 dates (<a href="https://www.healthcare.gov/quick-guide/dates-and-deadlines/">Source: HealthCare.gov, 2025</a>).

When does my 2026 coverage start?

If you enroll or change plans by December 15, 2025, your 2026 coverage starts January 1, 2026. If you enroll between December 16, 2025 and January 15, 2026, your 2026 coverage starts February 1, 2026. There is no third coverage-start milestone inside the Open Enrollment window (<a href="https://www.healthcare.gov/quick-guide/dates-and-deadlines/">Source: HealthCare.gov, 2025</a>).

What if I miss the January 15, 2026 deadline?

You can still enroll in 2026 coverage if you qualify for a Special Enrollment Period — typically triggered by a qualifying life event like losing job-based coverage, moving, getting married, having a baby, or gaining lawful presence. You have 60 days from the event to enroll. You can also apply for Medicaid or CHIP at any time, and a 90-day SEP may apply if your state recently found you ineligible for Medicaid (<a href="https://www.healthcare.gov/coverage-outside-open-enrollment/your-options/">Source: HealthCare.gov, 2025</a>).

Is the 2026 deadline the same in every state?

No. The 30-plus states that use HealthCare.gov all use November 1 – January 15. State-based exchanges — California, New York, Massachusetts, New Jersey, Colorado, and others — set their own dates, and several push the final deadline a week or two past January 15. The 2026 dates should be confirmed on each state's exchange page before you enroll.

Do I have to re-enroll every year, or does my 2025 plan roll over?

HealthCare.gov may auto-enroll you in a 2026 plan — usually the same plan, or a similar one if your 2025 plan is no longer being offered. Auto-enrollment keeps you covered, but you should still update your application to make sure your 2026 premium tax credit and cost-sharing reductions are based on accurate income and household information. Auto-enrollment does not always preserve your full subsidy (<a href="https://www.healthcare.gov/keep-or-change-plan/auto-enrollment/">Source: HealthCare.gov, 2025</a>).

Sources

1. HealthCare.gov — When can you get health insurance? (2026 dates and deadlines)
2. HealthCare.gov — Get or change coverage outside of Open Enrollment (SEP rules)
3. HealthCare.gov — Get Marketplace coverage if you lose or are denied Medicaid or CHIP
4. HealthCare.gov — Open Enrollment re-enrollment letters
5. HealthCare.gov — Automatic re-enrollment keeps you covered

Related FindMyHealthQuote Resources

• Health insurance glossary
• Compare health plans