Health insurance open enrollment: what to know
Last updated September 10, 2026.
Open enrollment is the annual window when anyone can buy health insurance through the federal or state marketplace, no matter their health. For most states, it runs from November 1 through January 15, with coverage starting as soon as January 1. If you miss it, you need a qualifying life event like losing a job, moving, getting married, or having a baby to enroll outside that window.
When open enrollment happens
The federal marketplace at healthcare.gov runs open enrollment from November 1 to January 15 each year. If you enroll by December 15, coverage starts January 1. If you enroll between December 16 and January 15, coverage starts February 1.
Some states run their own marketplaces with slightly different dates. California, New York, and a few others extend enrollment into late January or early February. Check your state marketplace site if your state does not use healthcare.gov.
Once the window closes, you cannot buy a marketplace plan until the next year unless you have a qualifying life event.
Who can enroll during open enrollment
Anyone can sign up or switch plans during open enrollment. You do not need to prove a life change or answer health questions. Pre-existing conditions do not affect your eligibility or price.
You can enroll if you have no insurance, if you want to change from your current marketplace plan, or if you want to drop employer coverage and buy your own plan instead. Employer coverage is usually cheaper if your job offers it, but you are free to compare.
Medicaid and Medicare have different rules. Medicaid enrollment is open year-round in every state. Medicare has its own enrollment periods, typically around your 65th birthday and October 15 to December 7 each year.
Qualifying life events that open a special enrollment period
If you miss open enrollment, you get a 60-day window to enroll after certain life changes. Common qualifying events include losing health coverage from a job, losing Medicaid eligibility, getting married or divorced, having a baby or adopting a child, and moving to a new state or county.
You usually need to provide proof: a letter from your old insurer, a marriage certificate, a birth certificate, or a lease showing your move date. The marketplace checks documents before approving your special enrollment.
Voluntary drops do not count. If you stop paying premiums and your plan cancels, that does not qualify you to re-enroll mid-year. Losing coverage means an involuntary loss like a job layoff or aging out of a parent's plan at 26.
How subsidies lower the monthly cost
Most people who buy marketplace insurance qualify for a premium tax credit that cuts the monthly bill. The subsidy is based on your income and household size. In 2025, individuals earning up to around $60,000 and families of four earning up to around $125,000 can receive help, though the exact cutoff shifts each year with inflation.
The marketplace calculates your subsidy when you apply. You can take it upfront as a discount on your monthly premium or claim it when you file taxes. Most people take it monthly so they pay less each month.
If your income changes during the year, report it to the marketplace so your subsidy adjusts. If you underestimate income and take too much subsidy, you may owe money back at tax time. If you overestimate, you get a refund.
Cost-sharing reductions for low-income households
If your income is below about $36,000 for an individual or $75,000 for a family of four, you may also qualify for cost-sharing reductions. These lower your deductible, copays, and out-of-pocket maximum, but only if you pick a Silver-tier plan.
Cost-sharing reductions do not show up as a separate payment. They change the plan design itself: a Silver plan that normally has a $5,000 deductible might drop to $500 if you qualify. The savings are invisible until you need care.
You must enroll in a Silver plan to get cost-sharing reductions. Bronze, Gold, and Platinum plans do not offer them, even if your income qualifies.
What to do if you miss the deadline
If you miss January 15 and have no qualifying event, you wait until the next open enrollment in November. In the meantime, you can apply for Medicaid if your income is low enough. Medicaid has no enrollment period and is available year-round.
Some people qualify for short-term health plans sold outside the marketplace. These plans are cheaper but exclude pre-existing conditions, cap benefits, and do not count as real health insurance under the Affordable Care Act. They are a gap measure, not a long-term solution.
Community health centers offer care on a sliding fee scale with no insurance required. Find one at findahealthcenter.hrsa.gov. If you need immediate help comparing options or understanding eligibility, a free consult by text with an AI doctor like Pymander can clarify next steps before you apply.
Common questions
Can I buy health insurance outside of open enrollment?
You can only buy a marketplace plan outside open enrollment if you have a qualifying life event like losing job coverage, getting married, having a baby, or moving to a new state. You have 60 days from the event to enroll. Medicaid enrollment is open year-round regardless of the calendar.
How much does marketplace insurance cost per month?
Monthly premiums vary widely by state, age, and plan tier. Before subsidies, a mid-tier Silver plan might cost $400 to $700 per month for a single adult. Most buyers qualify for subsidies that cut the cost, sometimes to under $50 per month. Your exact price depends on your income and zip code.
What counts as a qualifying life event?
Qualifying events include losing health coverage from a job or Medicaid, getting married or divorced, having a baby or adopting a child, moving to a new county or state, and turning 26 and aging off a parent's plan. Voluntarily dropping coverage or simply forgetting to enroll does not qualify.
Do I have to take the subsidy every month or can I claim it at tax time?
You can take the premium tax credit upfront as a monthly discount on your bill, or you can pay full price and claim the credit when you file your tax return. Most people take it monthly to lower their out-of-pocket cost. If you take it upfront and your income changes, you may owe money back or get a refund when you file taxes.
What happens if I enroll after December 15?
If you enroll between December 16 and January 15, your coverage starts February 1 instead of January 1. You will have a gap in coverage for January unless you have other insurance or Medicaid. Enroll by December 15 if you want coverage to begin January 1.
Sources
- HealthCare.gov - How to apply and enroll in Marketplace coverage
- HealthCare.gov - Qualifying life events
- KFF - Explaining health care reform: questions about health insurance subsidies
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