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Health Insurance Open Enrollment 2027: Dates, Deadlines & How to Prepare

Open enrollment is the one time each year almost anyone can sign up for a health plan, switch plans, or update coverage — no questions asked. Miss it, and you may be locked out until the next window unless a major life event opens a special one. Here are the key dates, what a Special Enrollment Period actually is, and a simple checklist so you walk in prepared instead of scrambling at the deadline.

What open enrollment actually is

Open enrollment is a set window each year when you can enroll in a health plan or change the one you have, without needing a qualifying reason. Outside that window, the marketplace is generally closed to new sign-ups unless you experience a life event. This applies to individual and family plans bought through the ACA marketplace or directly — employer group plans run their own annual enrollment period set by the employer.

Key dates for 2027 coverage

For most states on the federal marketplace, the individual open enrollment window follows this general schedule:

A handful of state-based exchanges set slightly different windows, and dates can shift year to year, so always confirm the current schedule for your state before relying on it. Employer group plans run on their own separate timeline.

Don't wait for the final deadline. Enrolling early means your coverage starts January 1, gives you time to confirm your doctors are in-network, and avoids the last-minute rush when help is hardest to reach.

Special Enrollment Periods

If you miss open enrollment, a Special Enrollment Period (SEP) may still let you sign up. An SEP is usually a 60-day window that opens after a qualifying life event, including:

Households with income below a certain level can often enroll year-round. If you're not sure whether you qualify, it's worth a quick call — a lot of people assume they're locked out when they actually aren't.

Your preparation checklist

Walk in ready with these five things and enrollment takes minutes instead of hours:

Mistakes worth avoiding

The biggest ones people make during open enrollment: auto-renewing without checking whether their plan actually changed, underestimating income and owing money at tax time, or choosing the lowest premium without checking the deductible and network. A few minutes of review — or a free call — prevents all three.

Frequently asked questions

When is open enrollment for health insurance?

For most states on the federal marketplace, individual open enrollment runs from November 1 to January 15, with coverage starting January 1 if you enroll by December 15. Some state exchanges differ, so confirm your state's dates before the window closes.

What happens if I miss open enrollment?

You generally can't buy a marketplace plan until the next window, unless you qualify for a Special Enrollment Period triggered by a life event, or your income qualifies you for year-round enrollment.

What is a Special Enrollment Period?

It's a window, usually 60 days, that opens after a qualifying life event like job loss, marriage, a move, or a new baby — letting you enroll or change plans outside the normal window.

Does open enrollment cost anything?

No. Enrolling is free, and working with a licensed broker like me costs you nothing, since I'm paid by the carrier, not by you.

Get ready for open enrollment

Let me review your options, confirm your doctors, and lock in the right plan before the deadline.

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