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Health Insurance Open Enrollment 2025: Everything You Need to Know

A complete guide to the 2025 ACA Open Enrollment period. Deadlines, what's new, and how to choose the right plan.

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Health Insurance Open Enrollment Guide for 2025

The annual Health Insurance Open Enrollment period is your opportunity to sign up for or change your health insurance coverage through the ACA Marketplace. Here’s everything you need to know for 2025.

Key Dates

  • Open Enrollment Start: November 1, 2024
  • Open Enrollment End: January 15, 2025
  • Coverage Start Date: January 1, 2025 (if enrolled by December 15)

What’s New for 2025

Several changes affect health insurance coverage this year:

  1. Enhanced subsidies continue - The enhanced premium tax credits from the Inflation Reduction Act remain in effect
  2. Plan updates - Insurers have updated their plan offerings and networks
  3. Cost changes - Premiums and out-of-pocket costs have been adjusted

How to Enroll

Through Healthcare.gov

Most states use the federal marketplace at Healthcare.gov. Create an account, enter your household information, and compare plans.

State-Based Marketplaces

Some states run their own marketplaces with different deadlines and options. Check if your state has its own exchange.

Choosing the Right Plan

Consider these factors when selecting a plan:

  • Premium - Your monthly cost
  • Deductible - What you pay before insurance kicks in
  • Network - Make sure your doctors are covered
  • Prescription coverage - Check if your medications are included
  • Total cost - Calculate your expected annual spending

Getting Help

Free assistance is available:

  • Navigators and certified application counselors
  • Insurance agents and brokers
  • Healthcare.gov customer service: 1-800-318-2596

Next Steps

Don’t wait until the last minute. Start comparing plans early to make an informed decision about your 2025 health coverage.

Tools

  • Coverage Quiz - Find the right health coverage for your situation

Data Sources

Open enrollment information in this guide comes from Healthcare.gov (opens in new tab) , CMS (opens in new tab) , and state marketplace data. Learn more about our data collection methods on our Methodology page.

Frequently Asked Questions

When is open enrollment for health insurance?
ACA marketplace open enrollment runs November 1 - January 15 in most states. Medicare open enrollment is October 15 - December 7. Employer plan enrollment varies by company but is typically in fall for January 1 coverage start.
Can I change health insurance outside open enrollment?
Yes, with a qualifying life event: marriage, divorce, birth/adoption, losing other coverage, moving to new area, or certain income changes. You typically have 60 days from the event to enroll in new coverage.
What should I consider during open enrollment?
Review: Are your doctors still in-network? Are your prescriptions covered? How does the deductible compare to your expected healthcare usage? Did premiums change? Consider HSA-eligible plans if you’re healthy and want tax advantages.
How do I know if I qualify for health insurance subsidies?
ACA premium subsidies are based on household income (100-400% of federal poverty level, with expanded assistance through 2025). Use Healthcare.gov’s calculator to estimate subsidies based on your expected income and household size.
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