Open Enrollment vs Special Enrollment Periods

Open Enrollment

Open Enrollment is the annual window when anyone can enroll in or change a Marketplace plan without needing a special reason. It typically runs in the late fall for coverage starting January 1, though exact dates can vary by state-based marketplace.

If you want to switch plans, adjust your subsidy, or sign up for the first time, Open Enrollment is the straightforward path. Missing it usually means waiting a year — unless you qualify for a Special Enrollment Period.

Special Enrollment Periods

A Special Enrollment Period (SEP) lets you enroll outside Open Enrollment after a qualifying life event: losing other coverage, getting married, having or adopting a child, moving, or certain income changes. You generally have 60 days from the event to enroll.

SEPs exist so life changes do not leave you stuck without coverage. If something major happens, check whether it opens an SEP — and act within the window, since it closes quickly.

Frequently asked questions

What is a qualifying life event?

A change like losing coverage, marriage, a new baby, or a move that opens a Special Enrollment Period, usually for 60 days, to enroll or change plans outside Open Enrollment.

What if I miss Open Enrollment and have no qualifying event?

You generally must wait until the next Open Enrollment for Marketplace coverage. Medicaid and CHIP, however, allow enrollment year-round if you qualify.