What Is a Flexible Spending Account?
A Flexible Spending Account (FSA) is an employer-sponsored benefit that lets you set aside pre-tax dollars to pay for eligible healthcare expenses. Because your contributions come out of your paycheck before federal income taxes are applied, an FSA can meaningfully reduce your taxable income each year.
FSAs are governed by IRS rules and offered through your employer's benefits package. They are not available to self-employed individuals or those without access to an employer-sponsored plan.
How Does an FSA Work?
Here's the basic flow of how an FSA operates during a plan year:
- Election: During open enrollment, you decide how much money to contribute to your FSA for the upcoming plan year.
- Payroll deductions: Your elected amount is divided evenly across your pay periods and deducted pre-tax from each paycheck.
- Full balance available upfront: Unlike an HSA, your full annual election is available to spend from day one of the plan year — even before you've contributed all of it.
- Pay or get reimbursed: Use your FSA debit card at the point of sale, or submit receipts for reimbursement through your FSA administrator.
Types of FSAs
Not all FSAs are the same. There are three main types:
- Health Care FSA (HCFSA): Covers eligible medical, dental, and vision expenses for you and your dependents.
- Dependent Care FSA (DCFSA): Covers eligible care expenses for children under 13 or dependents who cannot care for themselves (e.g., daycare, after-school programs).
- Limited Purpose FSA (LPFSA): Designed for people enrolled in an HSA-eligible High Deductible Health Plan (HDHP). Covers only dental and vision expenses.
FSA Contribution Limits
The IRS sets annual contribution limits for FSAs, which are adjusted periodically. Key points to know:
| FSA Type | Who Sets Limit | Notes |
|---|---|---|
| Health Care FSA | IRS (annual adjustment) | Per employee; employer may also contribute |
| Dependent Care FSA | IRS (statutory limit) | $5,000/year for married filing jointly or single; $2,500 if married filing separately |
| Limited Purpose FSA | IRS (same as HCFSA) | Dental and vision only |
Always check the IRS website or your HR department for the current year's limits, as they can change annually.
The "Use It or Lose It" Rule
One of the most important FSA rules to understand is the "use it or lose it" provision. Any money left in your FSA at the end of the plan year is forfeited — you cannot roll it over indefinitely or cash it out.
However, employers may offer one of two relief options:
- Grace period: Up to 2.5 extra months after the plan year ends to spend remaining funds.
- Rollover/carryover: A limited amount (set by the IRS each year) may roll over to the next plan year.
Employers are not required to offer either option, so check your plan documents carefully.
Who Is Eligible for an FSA?
To enroll in a Health Care FSA, you generally must:
- Be employed by a company that offers an FSA benefit
- Enroll during your employer's open enrollment period (or a qualifying life event window)
- Not be enrolled in a Health Savings Account (HSA) — unless using a Limited Purpose FSA
Key Takeaways
An FSA is a powerful, tax-advantaged tool for managing out-of-pocket healthcare costs. By planning your contributions carefully and understanding the rules around eligible expenses and the use-it-or-lose-it deadline, you can make the most of every dollar you set aside.