Special Enrollment Period 2026: Complete Guide to Qualifying Life Events

Direct answer: A Special Enrollment Period (SEP) lets you enroll in or change an ACA marketplace health plan outside the annual open enrollment window if you've had a qualifying life event, generally within 60 days of that event, and 2026 rules require documentation for a much larger share of applications than in prior years.

What changed for 2026

Two shifts stand out this year. First, the year-round special enrollment period that had been available to lower-income applicants ended in August 2025, meaning income alone no longer qualifies someone to enroll outside of open enrollment or a specific life event. Second, marketplaces have moved to a documentation-first model: many state exchanges now pre-verify a large share of SEP applications before approving them, rather than accepting a simple attestation.

Common qualifying events

Marriage, divorce, birth or adoption, loss of other coverage (including job loss, aging off a parent's plan at 26, or losing Medicaid/CHIP eligibility), and a permanent move to a new coverage area are the most frequently used qualifying events.

Documents to have ready

Depending on the event, expect to provide a marriage certificate, divorce decree, birth certificate, employer termination letter, COBRA notice, or a HIPAA certificate of prior coverage. Gathering these before you start your application shortens the review time considerably.