Montana health insurance open enrollment 2027
Montana residents enroll in 2027 Marketplace coverage through HealthCare.gov starting November 1, 2026; sign up by December 15, 2026 for coverage from January 1. Use the official site — it is the only place to get premium tax credits.
Marketplace details
Sources: HealthCare.gov – Dates and deadlines · CMS – State-based Exchanges. Checked October 28, 2026.
Go to HealthCare.govBefore you enroll
- See if you may qualify for Medicaid, CHIP or a premium tax credit using the HealthCare.gov screener.
- Compare deductibles and out-of-pocket maximums, not just monthly premiums.
- Check that your doctors and prescriptions are covered by the plan.
- Already enrolled? Compare 2027 plans before you accept automatic renewal.
Questions & answers
Where do I buy ACA health insurance in Montana?
Montana uses the federal marketplace, HealthCare.gov.
When is open enrollment for 2027 in Montana?
Open enrollment runs November 1, 2026 to January 15, 2027; enroll by December 15, 2026 for coverage starting January 1, 2027. Confirm on HealthCare.gov before the deadline.
What if I miss open enrollment?
You can enroll later only with a Special Enrollment Period after a qualifying life event (such as losing other coverage, moving, marriage or a new baby). Medicaid and CHIP applications are accepted any time.