Open enrollment
The annual period during which employees can enroll in, change, or cancel employer-sponsored benefits.
Last reviewed August 23, 2026
Definition
Open enrollment is the once-per-year period during which employees can enroll in, change, or cancel their employer-sponsored benefits, including health insurance, dental and vision coverage, life insurance, flexible spending accounts (FSA), health savings accounts (HSA), and various voluntary benefits.
For most employer-sponsored plans, the open enrollment window falls in October–December for plans effective January 1st. Outside this window, changes to coverage are generally not permitted unless you experience a qualifying life event, such as marriage, the birth of a child, or loss of other coverage.
Open enrollment is one of the most consequential financial decisions a household makes each year. The choices made during this period affect healthcare costs, take-home pay, and overall household financial health for the entire following year.
What open enrollment is, and how to use it covers what to gather before the window opens.
Examples
Your company announces open enrollment runs October 15–November 1. During this period, you can switch from a PPO to an HDHP plan and enroll in an HSA for the first time.
You decide to add your spouse to your employer health plan during open enrollment, increasing your premium by $300/month but eliminating their separate insurance cost.
You miss the open enrollment window and are stuck with your current plan for another year, even though other plans were available to you.
Frequently asked questions
What can I change during open enrollment?
During open enrollment, you can typically enroll in or change health, dental, vision, and life insurance plans; adjust your HSA or FSA contribution amounts; add or remove dependents; and enroll in voluntary benefits like legal plans, accident insurance, or critical illness coverage.
What happens if I miss open enrollment?
If you miss open enrollment, you generally cannot change your employer benefits until the next open enrollment period, unless you experience a qualifying life event (marriage, new child, job change, loss of other coverage). Missing open enrollment means keeping whatever coverage you have (or no coverage if you didn't enroll).
Can I change my benefits outside of open enrollment?
Yes, but only if you have a qualifying life event, such as getting married, having a baby, adopting a child, changing jobs, or losing coverage from another source. You typically have 30–60 days from the event to make changes.
Related terms
HSA (Health Savings Account)
A tax-advantaged account that lets you save pre-tax money for qualified medical expenses, available with high-deductible health plans.
Deductible
The amount you pay out of pocket for covered services before your insurance begins to pay.
Premium
The recurring payment you make, monthly, quarterly, or annually, to maintain an insurance policy.
FSA (Flexible Spending Account)
A pre-tax account for healthcare expenses available with most employer-sponsored health plans, but funds typically must be used within the plan year.
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