Open Enrollment is the one window each year when almost anyone can buy an individual or family health plan — or switch to a better one — without needing a special reason. For 2027 coverage, that window opens November 1, 2026. Miss it, and in most cases you're locked into whatever you have (or don't have) until 2028, unless your life changes in a way the rules officially recognize.
This guide covers the dates that actually matter, what changed heading into 2027, why letting your plan auto-renew untouched is one of the most expensive habits in health insurance, and a simple checklist to get it done right.
The dates that matter
Open Enrollment 2027 — key dates
Those are the federal Marketplace dates used in most states. A handful of states run their own marketplaces and set their own deadlines — some give you more time, a few handle effective dates differently. The authoritative place to confirm your state's window is healthcare.gov.
One detail people miss: if your current plan ends December 31 and you enroll in January, your new plan likely won't start until February 1 — leaving you uncovered for a full month. If continuous coverage matters to you, treat December 15 as your real deadline, not January 15.
What happens if you miss it
Outside of Open Enrollment, you can only sign up for a Marketplace plan during a Special Enrollment Period (SEP) — and SEPs are only triggered by qualifying life events. The most common ones:
- Losing job-based coverage — laid off, hours cut, employer dropped the plan, or COBRA ran out
- Getting married
- Having a baby or adopting a child
- Moving to a new ZIP code or county with different plan options
- Divorce or legal separation that costs you coverage
- Turning 26 and aging off a parent's plan
- Losing Medicaid or CHIP eligibility
Most SEPs give you 60 days from the event to enroll, and you may need documentation proving the event happened. Medicaid and CHIP are different — if you qualify, you can apply any time of year. If you're currently in a coverage gap, our guide to health insurance between jobs walks through the options, including short-term plans as a stopgap. One honesty note there: some plans sold outside the Marketplace are not comprehensive major-medical coverage — a licensed agent should spell out exactly what any plan does and doesn't cover before you buy.
What changed for 2027
Two things are worth knowing before you shop this season.
First, premiums rose in many markets. Rate changes vary a lot by state, insurer, and plan, so there's no single number that applies to everyone — but if your renewal letter shows a bigger monthly bill for the same plan, you're not alone, and you're exactly the person who should be comparing instead of auto-renewing.
Second, the subsidy rules you remember may not be the rules in force. Premium tax credits remain available under current law and are based on your household income, family size, and the cost of plans where you live — but the specifics are set by federal law and can change from year to year. Don't assume last year's subsidy carries over unchanged: re-estimate your 2027 income carefully when you apply, because the credit is reconciled on your tax return. The IRS explains how the premium tax credit works, and healthcare.gov has the current income guidelines.
The practical takeaway: read your renewal letter the day it arrives, and treat it as the starting line for comparison — not a bill to quietly accept.
Think you might qualify for savings?
Many households qualify for income-based premium help and never claim it. Run the 60-second check and find out where you stand before you shop.
Run the Subsidy CheckThe auto-renewal trap
If you do nothing during Open Enrollment, most plans auto-renew you into the same plan (or the closest available match) for 2027. It feels convenient. It's often the worst financial decision of the season — for three reasons:
- Your plan changes even when its name doesn't. Premiums, deductibles, copays, provider networks, and covered drug lists are all reset for the new year. The plan you liked in 2026 can look very different in 2027 — and your doctor may quietly fall out of network.
- The subsidy math shifts underneath you. Premium help is benchmarked against plan prices in your area. When those prices move, the amount of help you get can change even if your income and plan stay identical — which can make a different plan the better deal this year.
- New plans enter your market. Insurers add, drop, and redesign plans every year. The best-value option for your household in 2027 may be a plan that didn't exist in 2026 — and auto-renewal will never show it to you.
Comparing takes under an hour with help. Auto-renewing into the wrong plan costs you all year.
Your 7-step OEP checklist
Who should shop hardest this year
Everyone should look. These households should look twice:
- Self-employed and 1099 workers — you're buying your own coverage with no HR department backstopping the choice. Our self-employed health insurance guide covers the angles, including how subsidies interact with variable income.
- Households whose income changed — up or down, a meaningful income change almost always changes your subsidy, and sometimes your best plan tier.
- Anyone whose premium jumped at renewal — a big increase on the same plan is the market telling you to compare. See our health insurance cost guide for what actually drives what you pay.
- Anyone who moved or added a family member — both reshuffle your plan options and your pricing.
How an agent helps — at $0 cost to you
Here's the part of the system that surprises people: working with a licensed agent doesn't cost you anything, and it can't make your plan more expensive. Plan prices are filed with regulators — the premium is the same whether you enroll alone at midnight or with an agent walking you through it. Agents are compensated by the insurance companies, not by you.
What a good agent actually does during OEP: pressure-tests your income estimate so your subsidy is right, checks your doctors and medications against every plan on the shortlist, explains the deductible trade-offs in plain English, handles the enrollment paperwork, and stays your point of contact when a claim or billing issue surfaces in March. Our licensed health team does this all day during enrollment season — and our FAQ covers how the service works.
Frequently asked questions
When is Open Enrollment for 2027 health insurance?
In most states, it runs November 1, 2026 through January 15, 2027. To have coverage in place January 1, enroll by December 15, 2026. Some state-run marketplaces set their own deadlines — confirm yours at healthcare.gov.
What happens if I enroll between December 16 and January 15?
In most states your coverage starts February 1, 2027. If your old plan ends December 31, that leaves a January gap — which is why December 15 is the deadline that really matters.
Can I enroll outside of Open Enrollment?
Only with a Special Enrollment Period triggered by a qualifying life event — losing job-based coverage, marriage, a new child, or a move, among others. You typically get 60 days from the event. Medicaid and CHIP accept applications year-round for those who qualify.
Do I need to do anything if I like my current plan?
Review it anyway. Premiums, networks, and drug lists reset every year, and the subsidy math can shift even when your plan doesn't. Read the renewal letter, update your income estimate, and actively re-select — even if you land on the same plan.
Does using an agent cost more than enrolling on my own?
No. Plan prices are filed with regulators and are identical with or without an agent. Agents are paid by the insurance companies, so the comparison help costs you nothing extra.