Special Enrollment Period (SEP) Triggering Event
By Saif Akhtar, Co-Founder & COO, SimplyHRA. Published and updated November 14, 2026.
What Is a Special Enrollment Period (SEP) Triggering Event?
A Special Enrollment Period (SEP) Triggering Event is a qualified life event defined under 45 CFR § 155.420 that grants individuals a 60-day window to enroll in off-cycle individual major medical health insurance outside the standard autumn Open Enrollment Period. Gaining access to an Individual Coverage HRA (ICHRA) or QSEHRA is an explicit federal SEP triggering event.
How an ICHRA Triggers an Individual Market SEP
Normally, employees can only purchase individual health insurance on state or federal ACA exchanges during the annual Open Enrollment Period (November 1 through January 15 in most states). Under federal regulations established jointly by the Departments of the Treasury, Labor, and Health and Human Services (45 CFR § 155.420(d)(14)), newly gaining access to an ICHRA or QSEHRA triggers a special enrollment window:
- 60-Day Prior Window: Sponsoring employers must provide mandatory ICHRA written notice at least 90 days before the plan year begins. Employees can select an individual plan up to 60 days before the HRA start date.
- 60-Day Post Window: If an employee experiences a mid-year qualifying event (such as a new hire or class change), they have 60 days following the date they first gain access to enroll in coverage.
- Effective Coverage Date: Coverage takes effect on the first day of the month following plan selection, guaranteeing zero coverage gaps.
SEP Notice Timeline & Employer Checklist
| Milestone | Required Action | Responsible Party |
|---|---|---|
| T - 90 Days | Distribute written ICHRA Notice explaining reimbursement amounts, opt-out rights, and SEP eligibility | SimplyHRA / Plan Sponsor |
| T - 60 Days | Employee uses SEP triggering event to shop individual major medical exchange plans | Eligible Employee |
| Day 1 (Plan Start) | ICHRA reimbursement active; first month premium substantiated | SimplyHRA Substantiation Engine |
Select Your Evaluation Path
Path 1 (Let me try it): Schedule a walkthrough demo to see automated SEP notice generation.
Path 2 (Let me research): Learn employer compliance rules: ACA Safe Harbor Affordability Guide.
Path 3 (I have questions): Schedule a 15-minute briefing with Saif Akhtar regarding mid-year ICHRA onboarding.
Frequently Asked Questions
Can an employer launch an ICHRA mid-year without waiting for Open Enrollment?
Yes. Gaining access to a newly established ICHRA or QSEHRA is a federally recognized SEP triggering event. Employees receive a 60-day window to purchase qualifying individual market health coverage on or off the exchange at any point during the calendar year.
What documentation does an employee need to prove an ICHRA SEP?
Employees submit the official 90-day ICHRA Written Notice provided by SimplyHRA to the health insurance exchange or carrier. This letter serves as certified legal proof of the SEP qualifying event.
Related glossaries
Special Enrollment Period (SEP) Triggering Event
Section 105 Medical Reimbursement Plan