Most people can buy or change individual health insurance only during the annual open enrollment period. But life does not follow an insurance calendar. Losing a job, getting married, moving to a new state, or having a baby can leave you suddenly needing coverage. A special enrollment period (SEP) allows you to enroll in or change a plan outside open enrollment when certain events happen. This guide explains which events qualify, how long you have to act, when coverage begins, and how to avoid common mistakes.
How special enrollment periods work
Under the Affordable Care Act, insurers in the individual market and the Health Insurance Marketplace accept new enrollments outside open enrollment only when you experience a qualifying life event. Employer group plans have their own special enrollment rules under federal law, often with a shorter 30-day window.
In the Marketplace, you generally have 60 days after the qualifying event to choose a plan. For some events, such as an expected loss of coverage, you can also apply up to 60 days before the event so there is no gap.
Qualifying life events
Loss of health coverage
This is the most common trigger. Examples include:
- Losing job-based coverage because you quit, were laid off, or had hours reduced
- Losing Medicaid or CHIP eligibility
- Aging off a parent’s plan at 26
- Losing coverage through a spouse after divorce or death
- A plan year ending for a non-calendar-year policy
Voluntarily dropping coverage or losing it because you did not pay premiums generally does not qualify.
Changes in household
- Getting married
- Having a baby, adopting a child, or placing a child for foster care
- Divorce or legal separation that results in loss of coverage
- Death of a household member covered under your plan
Changes in residence
Moving to a new ZIP code or county, moving to the United States from abroad, or moving to or from a place for school or seasonal work can qualify. In most cases you must have had qualifying health coverage for at least one day in the 60 days before the move.
Other qualifying situations
- Gaining citizenship or lawful presence
- Gaining membership in a federally recognized tribe or Alaska Native corporation
- Leaving incarceration
- Starting or ending service as an AmeriCorps member
- Changes in income that affect eligibility for premium tax credits, in some cases
- Errors by the Marketplace or exceptional circumstances such as a serious illness or natural disaster that prevented enrollment
When coverage starts
Start dates depend on the event:
- Birth, adoption, or foster placement: Coverage can start on the date of the event.
- Loss of coverage: If you apply before the loss, coverage typically starts the first day of the month after coverage ends.
- Marriage, moves, and most other events: Coverage generally starts the first day of the month after you choose a plan.
Check the start date shown on your application, because an unexpected gap can leave you paying medical bills out of pocket.
Documents you may need
The Marketplace often asks for proof that you experienced the event. You usually have 30 days after selecting a plan to upload documents. Examples include:
- A letter from an employer or insurer showing the date coverage ended
- A Medicaid or CHIP denial or termination notice
- A marriage certificate
- A birth certificate or hospital record
- A lease, mortgage statement, or utility bill showing a new address
If you do not submit documents, your coverage may be canceled or the SEP may be denied. Keep copies of everything you upload.
Low-income special enrollment period
For several years, the federal Marketplace offered a monthly SEP for people with household income at or below 150% of the federal poverty level. Federal rule changes adopted in 2025 ended that monthly option on the federal platform, and some state-based marketplaces set their own policies. Check HealthCare.gov or your state’s exchange to confirm what is available where you live.
Medicaid and CHIP have no enrollment period
If you qualify for Medicaid or the Children’s Health Insurance Program, you can apply at any time of the year. You do not need a special enrollment period. Coverage may even be retroactive up to three months before your application in many states, depending on state rules.
Employer plan special enrollment
If you have access to a job-based plan, federal law, under HIPAA, requires group health plans to offer special enrollment when you lose other coverage or gain a dependent through marriage, birth, adoption, or placement for adoption. Employees usually have 30 days to request enrollment, and some plans also offer 60 days for losing Medicaid or CHIP. Ask your HR department for the exact deadline in writing.
COBRA and the Marketplace
When you leave a job, you may be offered COBRA continuation coverage. You can usually choose a Marketplace plan instead during your 60-day SEP. If you voluntarily drop COBRA or let it lapse outside open enrollment, that usually does not create a new SEP. Comparing options before your window closes is important.
Mistakes to avoid
- Waiting too long. Missing the 60-day window means waiting until the next open enrollment unless another event occurs.
- Assuming a voluntary loss qualifies. Dropping a plan you do not like is not a qualifying event.
- Ignoring document requests. Unverified SEPs can lead to canceled coverage.
- Forgetting dependents. Add new spouses or children during the window.
- Not updating income. Premium tax credits depend on your projected annual income. Report changes to avoid repaying credits at tax time.
Steps to enroll
- Confirm your event qualifies using HealthCare.gov’s screening questions or your state exchange.
- Note the date of the event and your 60-day deadline.
- Gather documents proving the event.
- Compare plans by premium, deductible, network, and drug coverage.
- Select a plan and pay the first premium, called the binder payment.
- Upload documents promptly.
Special enrollment for people turning 26 or leaving school
Young adults face some of the most common coverage transitions. Under the Affordable Care Act, children can stay on a parent’s plan until age 26, regardless of marriage, student status, or financial dependence. When coverage ends at 26, the loss of coverage triggers a special enrollment period. Ask the parent’s plan when exactly coverage stops, because some plans end coverage on the birthday and others at the end of that month or plan year.
Students leaving a university-sponsored health plan after graduation also qualify, because student health plans count as minimum essential coverage. Plan ahead by applying up to 60 days before the coverage end date so the new plan starts the next day. If income will be low during a job search, check whether Medicaid is available in your state, since Medicaid accepts applications at any time.
New graduates who start a job with benefits should compare the employer plan with any Marketplace option. If the employer plan is considered affordable and meets minimum value standards under federal rules, you generally will not qualify for premium tax credits on a Marketplace plan, which makes the employer plan the better financial choice in most cases.
Related reading: Medicare IRMAA: How Income-Related Surcharges Work and How to Appeal Them and Short-Term Health Insurance: How It Works, What It Excludes, and Safer Alternatives.
Frequently Asked Questions
How long is a special enrollment period?
For Marketplace plans, you generally have 60 days from the qualifying event. Employer plans must offer at least 30 days for most HIPAA special enrollment events.
Does moving always qualify for a special enrollment period?
No. A move usually qualifies only if you had qualifying coverage for at least one day in the 60 days before moving, with exceptions such as moving from abroad.
Can I enroll in Medicaid outside open enrollment?
Yes. Medicaid and CHIP accept applications year-round, so no special enrollment period is needed.
Is quitting my job a qualifying life event?
Losing job-based coverage qualifies even if you left voluntarily, because you are losing the coverage involuntarily. Choosing to drop coverage while still employed does not.
What if I miss my special enrollment deadline?
You will usually need to wait for the next open enrollment period unless another qualifying event happens. You may still qualify for Medicaid or CHIP anytime.
This article is for general informational purposes only and is not legal, medical, tax, or financial advice. Rules vary by state and change over time; confirm details with the relevant agency or a licensed professional.
