Enrollment is the process of signing up for a health insurance plan. Being enrolled means you have an active health insurance policy. On the ACA Marketplace, enrollment is only available during specific windows — the annual Open Enrollment Period or a Special Enrollment Period triggered by a qualifying life event.
The enrollment process typically involves:
Your coverage start date depends on when you enroll. For plans selected during Open Enrollment by December 15, coverage starts January 1. Plans selected between December 16 and January 15 start February 1. For Special Enrollment Period plans, coverage typically starts the first of the month following enrollment, though coverage for loss of prior coverage may start sooner.
Enrollment is not complete until your first premium payment is received by the insurer. Completing the application selects your plan — making your first payment activates it.
Your coverage is not active until your first premium payment is processed by the insurer. Most insurers give you until the end of the month in which your coverage starts to make that first payment. If you miss it, your application may be cancelled and you’d need to re-enroll — which may not be possible outside of Open Enrollment or an SEP.
If you miss Open Enrollment without a qualifying life event, you generally cannot enroll in Marketplace coverage until the next Open Enrollment Period — which would leave you uninsured for potentially the rest of the year. Medicaid and CHIP accept applications year-round if your income qualifies. A broker can check whether any alternative pathways are available for your situation.
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