For ACA Marketplace health coverage, open enrollment for 2027 coverage starts on November 1, 2026. In most states, that’s the first day you can enroll, renew, or change plans for the coming year, and the federal Marketplace says open enrollment ends on January 15 the following year.

Key dates

  • November 1, 2026: Open enrollment starts for 2027 Marketplace plans.
  • December 15, 2026: Last day to enroll or change plans for coverage starting January 1.
  • January 15, 2027: Open enrollment ends.

Important note

Some states run their own Marketplace and may use slightly different dates, so the exact deadline can vary by state.