What Is a Special Enrollment Period (SEP) for Health Insurance?

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Updated: October 26, 2026

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Key Takeaways
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A special enrollment period opens a 60-day window to enroll in Marketplace coverage after a qualifying life event.

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Job loss, marriage, birth, adoption and permanent moves are all SEP triggers recognized by HealthCare.gov.

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In HealthCare.gov states, people newly enrolling after a loss of other coverage must send proof, such as a termination letter, within 30 days of picking a plan.

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A missed 60-day window means waiting for open enrollment, which lasts from Nov. 1, 2026, to Jan. 15, 2027, on HealthCare.gov, unless a serious medical condition, a natural disaster or an enrollment error kept you from enrolling. State exchanges set their own dates.

What Is a Special Enrollment Period?

A special enrollment period (SEP) is a 60-day window, opened by a qualifying life event, to enroll in or change a Marketplace plan outside open enrollment, which lasts from Nov. 1 to Jan. 15 on HealthCare.gov. The 60-day clock starts on the date of the event, even if you learn about the SEP later. HealthCare.gov asks for proof only when your eligibility notice says so, and it always asks people newly enrolling after a loss of other coverage.

How SEPs work:

  • SEP windows apply to Marketplace plans on HealthCare.gov and state-based exchanges.
  • With a loss-of-coverage event, you can pick a plan up to 60 days before or 60 days after the loss date, or up to 90 days after losing Medicaid or CHIP.
  • Medicaid and CHIP accept applications year-round (no SEP is required for either program).
  • Coverage starts the first of the month after you pick a plan for events like marriage, a move or a past loss of coverage. A plan picked before you lose other coverage begins the first of the month after the old coverage ends, and births, adoptions and foster placements can start on the day of the event.

What Life Events Qualify You for a Special Enrollment Period?

Federal regulators at CMS, the Centers for Medicare and Medicaid Services, group qualifying life events into four categories, which are loss of coverage, household changes, residence changes and other qualifying circumstances. Each category has its own eligibility rules, and a new spouse or child added through a household change can enroll in a plan of their own.

Loss of Coverage

Job loss, aging off a parent’s plan at 26, loss of Medicaid or CHIP, end of COBRA

Enrollment opens up to 60 days before or 60 days after the loss (90 days after for Medicaid or CHIP)
Household Changes
Marriage, birth, adoption, foster placement, or a divorce or death that ends your coverage
Birth, adoption and foster placement allow same-day coverage dates
Residence Changes
Moving to a new ZIP code or county, moving to the U.S. from abroad, moving from a U.S. territory
Requires minimum essential coverage, meaning qualifying health coverage like a job-based, Marketplace, Medicaid or Medicare plan, for at least one day in the 60 days before the move. Moves from another country or a U.S. territory are exempt.
Other Qualifying Circumstances
Gaining citizenship or lawful presence, release from incarceration, tribal membership changes, gaining or losing cost-sharing reductions (current enrollees), exceptional circumstances such as a natural disaster
Exceptional circumstances reviewed case by case by CMS

When a Special Enrollment Period Does Not Apply

Not every disruptive life change meets CMS criteria. CMS doesn't grant an SEP when you drop a plan by choice or lose one for unpaid premiums. The end of a short-term plan doesn't qualify either, because short-term plans don't count as minimum essential coverage.

  • Voluntary plan cancellation: Coverage you drop by choice doesn’t open a window for new Marketplace enrollment, whatever the reason.
  • Nonpayment of premiums: A plan that ends for unpaid premiums counts as a voluntary loss and doesn’t qualify, even when the missed payment was unintentional.
  • Short-term plan expiration: These plans aren't minimum essential coverage under the ACA, so their end date isn't a qualifying event.
  • Divorce or death without a coverage loss: A divorce, legal separation or death in the household opens an SEP only when it ends your health coverage.
  • Temporary relocation: Vacations, seasonal work assignments and short stays away from your primary address don't count as a permanent move.
  • Premium increases on existing coverage: A price increase on your employer plan or current Marketplace plan isn't grounds for an SEP if coverage is still available.

How a Special Enrollment Period Works

Your SEP outcome depends on the qualifying event, when it happened and the date you pick a plan. Plan selection is the day you choose a plan in your HealthCare.gov or state exchange account. That date sets the 30-day deadline for any documents the Marketplace requests, and the table below shows how it sets your coverage start date for each event. Your enrollment is complete once the Marketplace confirms your SEP, if it asked for proof, and you pay the first premium.

How Long the Special Enrollment Period Lasts by Event Type

An SEP gives you 60 days from the qualifying event to pick a plan, and a loss of coverage changes that timing in two ways. You can pick a plan up to 60 days before the loss so the new plan begins the first of the month after the old one ends. A loss of Medicaid or CHIP also extends the window to 90 days after the loss. Births, adoptions and foster placements start coverage on the day of the event.

Marriage and a permanent move both start coverage on the first of the month after you pick a plan. A missed 60-day window means waiting for open enrollment unless a serious medical condition, a natural disaster or an error by the Marketplace, your insurer or an enrollment helper kept you from enrolling. The Marketplace opens a separate SEP once it confirms one of those situations.

Loss of coverage, plan picked before the loss
60 days before
60 days before the loss date
First of the month after old coverage ends
Loss of coverage, plan picked after the loss
60 days after (90 days for Medicaid or CHIP)
Date of loss
First of the month after plan selection
Birth
60 days after
Date of birth
Same day as birth (retroactive)
Adoption or foster placement
60 days after
Date of adoption or placement
Same day as adoption or placement (retroactive)
Marriage
60 days after
Date of marriage
First of the month after plan selection
Permanent move
60 days after
Date of move
First of the month after plan selection
Gain of citizenship or lawful presence
60 days after
Date status is granted
First of the month after plan selection
Natural disaster
60 days after
End of the FEMA incident period
First of the month after plan selection, or the date you’d have picked a plan without the disaster if you request it
Serious medical condition or enrollment error
Set by the Marketplace
Date the Marketplace grants the SEP
First of the month after plan selection

Documents You'll Need to Prove a Qualifying Event

HealthCare.gov requires documents for one SEP type. People newly enrolling after a loss of coverage must prove the loss and its date within 30 days of picking a plan. For other SEPs in HealthCare.gov states, your signed statement on the application is enough unless your eligibility notice asks for proof. State exchanges set their own rules, and Massachusetts can ask for proof of any qualifying event, with 90 days to send it. If you don't have an acceptable document, HealthCare.gov accepts a letter of explanation.

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    Proof of coverage loss (required for new enrollees in HealthCare.gov states)

    A termination letter from your employer, a COBRA continuation coverage election notice, a notice from Medicaid or CHIP that ends your coverage or an insurer letter that confirms your prior plan’s end date. The document must show your name and the loss date clearly. Pay stubs with premium deductions alone aren’t sufficient.

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    Proof of household change (if your exchange requests it)

    A marriage certificate, birth certificate, adoption decree or court order of foster placement. A divorce qualifies only when it ends your coverage, so proof of that loss goes with the decree. Each document must show the event date, and a document for a new dependent must name the dependent and tie back to the household. Upload a scan or clear photo to your Marketplace account, or mail a photocopy and keep the original.

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    Proof of permanent move (if your exchange requests it)

    A signed lease, mortgage statement or utility bill in your name at the new address. You’ll also need proof you had qualifying health coverage for at least one day in the 60 days before your move, unless you moved from another country or a U.S. territory.

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    Proof of qualifying status change (if your exchange requests it)

    A naturalization certificate, incarceration release paperwork or tribal membership ID, depending on the event. For a natural disaster, you call the Marketplace Call Center, and your county must be eligible for FEMA individual or public assistance.

State Variation in Special Enrollment Period Rules

Twenty states and Washington, D.C., operate their own Marketplaces in 2026 and set their own SEP rules, including broader qualifying events, longer windows and separate document standards. In those states, deadlines and qualifying events come from the state exchange, and residents who follow federal rules there miss options only the state exchange has.

  • California (Covered California): Open enrollment for 2027 coverage lasts from Nov. 1, 2026, to Jan. 31, 2027, which is 16 days longer than HealthCare.gov. Covered California ended its monthly SEP for residents earning up to 150% of the federal poverty level (FPL) on Sept. 1, 2025, under the 2025 federal Marketplace rule. FPL is an income measure the U.S. Department of Health and Human Services (HHS) sets each year, and it equals $15,960 for one person in 2026 in the 48 contiguous states.
  • New York (NY State of Health): Residents eligible for the Essential Plan, New York’s plan for lower-income residents who don’t qualify for Medicaid, can enroll any time of year. Standard Marketplace plans, called qualified health plans, follow separate SEP rules.
  • Washington (Washington Healthplanfinder): Survivors of domestic violence can apply for coverage any time of year, with no 60-day limit. HealthCare.gov gives survivors of domestic abuse or spousal abandonment 60 days to enroll.
  • Massachusetts (Health Connector): Residents who newly qualify for ConnectorCare, the state’s subsidized plans for income-eligible residents, can enroll any time of year with no 60-day window. Current members get an SEP when an income change alters the financial help they receive. Documents are due within 90 days, compared with 30 days on HealthCare.gov.

How to Enroll During a Special Enrollment Period

To enroll during an SEP, you confirm your qualifying event, pick a plan sold in your ZIP code and send any documents the Marketplace requests within 30 days of picking it. You can't use the coverage until the Marketplace confirms your SEP and you pay the first premium. Start early in the 60-day window so you have time to replace a rejected document before the deadline.

  1. 1
    Confirm Your Qualifying Event and Start Date

    The 60-day clock starts on the date of the qualifying life event, even if you learn about the SEP later. Match the event to the correct CMS category before you apply.

    With a loss-of-coverage event, you can pick a plan up to 60 days before your coverage ends, and the new plan begins the first of the month after the old one ends.

  2. 2
    Gather Documentation Before Applying

    Your eligibility notice tells you whether you need documents. In HealthCare.gov states, new enrollees who lost other coverage always get the request, and they send a termination letter, COBRA notice or insurer letter that shows the end date. State exchanges can ask for proof of other events, such as a marriage certificate or lease. Gather these papers before you apply so a request doesn't slow you down.

  3. 3
    Apply Through HealthCare.gov or Your State Marketplace

    Report the qualifying event in your account and complete the eligibility screening. Once the system confirms your SEP eligibility, it shows the plans sold in your ZIP code with subsidy amounts already applied, so you don’t calculate subsidies yourself.

  4. 4
    Compare Plans and Premium Tax Credit Eligibility

    If you’re new to the Marketplace, compare plans across the four categories of Bronze, Silver, Gold and Platinum. Premiums, deductibles, networks and out-of-pocket maximums (the most you pay for covered care in a year) differ by category. If you already have a Marketplace plan, the SEPs for losing coverage, moving and adding a household member keep you in your current category, so compare plans within it. Premium tax credits recalculate automatically from your household income and size and work the same way during an SEP as during open enrollment.

  5. 5
    Select a Plan, Upload Documents and Pay

    Pick your plan, then upload any documents the Marketplace requests within 30 days of that date. The plan selection date sets your coverage start date, but you can’t use the coverage until the Marketplace confirms your SEP and you pay the first premium to the insurer. If confirmation takes you past the start date, you pay premiums back to that date, and care you received after the start date counts as covered under the plan’s terms.

What Happens if You Miss Your Special Enrollment Period

A missed 60-day SEP window means waiting for open enrollment, which lasts from Nov. 1, 2026, to Jan. 15, 2027, on HealthCare.gov, unless one of the exceptions below applies. There's no federal penalty for missing an SEP, but without other coverage you pay all medical costs until your new plan begins, emergencies included.

You have these options until the next open enrollment.

  • Medicaid or CHIP: Both accept applications year-round in every state. In states that expanded Medicaid under the ACA, adults qualify with income up to 138% of the federal poverty level, or $22,025 for one person in 2026. Non-expansion states set lower limits, so check with your state Medicaid agency.
  • Short-term limited-duration plans: These plans are sold in states that permit them. They can exclude pre-existing conditions and aren’t required to cover the 10 essential health benefits the ACA sets, including emergency care, mental health and prescription drugs.
  • Request an exceptional-circumstances SEP: Call the Marketplace at 1-800-318-2596 if a serious medical condition, a FEMA-declared disaster or an enrollment error kept you from picking a plan. If the Marketplace denies the request, you have 90 days from your eligibility notice to appeal.
  • Wait for open enrollment: Applications for 2027 coverage open Nov. 1, 2026. A plan picked by Dec. 15, 2026, begins Jan. 1, 2027, and a plan picked from Dec. 16 to Jan. 15 begins Feb. 1.

How to Use a Special Enrollment Period

An SEP gives you 60 days to enroll in Marketplace coverage after a qualifying life event. Confirm the event, gather any documents your exchange requests and apply through HealthCare.gov or your state exchange. Pick a plan early so you have time to replace a rejected document before the 30-day deadline.

Special Enrollment Periods: FAQ

About Mark Fitzpatrick

Mark Fitzpatrick, Licensed P&C Insurance Expert, MoneyGeek

Mark Fitzpatrick is a licensed Property and Casualty (P&C) Insurance Producer and MoneyGeek's resident expert in insurance and economics. In nearly a decade covering the insurance market at LendingTree and MoneyGeek, he's analyzed hundreds of carriers and millions of rates across auto, home, renters, health and life insurance.

His work has appeared in The Washington Post, The New York Times and NPR. He draws on independent cost and consumer experience data, and no insurance company partnerships affect his recommendations.

Mark studied at Boston College and later earned a master's in economics and international relations from Johns Hopkins University. He worked in financial risk management at State Street before joining MoneyGeek. He's also a five-time “Jeopardy!” champion.

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