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Understanding Flexible Spending Accounts: What They Are and How They Work

A Flexible Spending Account (FSA) is a workplace benefit that allows employees to set aside pre-tax money to pay for certain medical and dependent care expenses. The account operates through payroll deductions, meaning money comes out of your paycheck before taxes are calculated. This reduces your taxable income for the year, which can result in tax savings.

FSAs come in two main types: healthcare FSAs and dependent care FSAs. A healthcare FSA lets you save money for medical expenses like doctor visits, prescription medications, dental work, and vision care. A dependent care FSA allows you to set aside funds for childcare or adult care expenses so you can work. Some employers offer both types, while others may offer just one.

The basic mechanics are straightforward. During your employer's open enrollment period (usually once per year), you decide how much to contribute to your FSA for the upcoming year. Your employer then deducts that amount from your paychecks in equal installments throughout the year. When you have a qualifying expense, you can use your FSA card or submit a claim form to reimburse yourself.

According to the U.S. Department of Labor, approximately 37 million Americans participate in FSAs annually. The average healthcare FSA contribution is around $2,750 per year, though limits change yearly. For 2024, the maximum contribution limit for healthcare FSAs is $3,200, and for dependent care FSAs is $5,000.

A key distinction to understand is that FSAs are different from Health Savings Accounts (HSAs) and health insurance plans. FSAs are "use it or lose it" accounts with annual contribution limits, whereas HSAs can roll over unused funds and have different rules. Your FSA is separate from your health insurance coverage and works alongside it to help manage out-of-pocket costs.

Practical Takeaway: Review your employer's benefits materials to determine which FSA options are available to you. Understanding the basic structure helps you decide whether an FSA makes sense for your financial situation and healthcare needs.

Qualifying Expenses You Can Pay With Your FSA

FSAs can cover a wide range of medical and dependent care expenses, but not every health-related cost qualifies. The IRS maintains specific rules about what counts as an eligible expense. For healthcare FSAs, the expense must be for the diagnosis, cure, mitigation, treatment, or prevention of disease, or for affecting any body structure or function.

Common qualifying medical expenses include doctor and dentist visits, prescription medications, eyeglasses and contact lenses, hearing aids, mental health counseling, physical therapy, and orthodontic treatment. Many over-the-counter items also qualify, such as pain relievers, allergy medications, antacids, and first aid supplies. You can use your FSA to pay copayments and coinsurance amounts, and to cover deductibles for your health insurance plan.

Medical equipment and supplies that qualify include blood pressure monitors, glucose meters for diabetes management, crutches, wheelchairs, and bandages. Certain cosmetic procedures do not qualify, but reconstructive surgeries following an accident or medical condition typically do. For example, if you need rhinoplasty (nose surgery) for breathing problems, it may qualify, but cosmetic rhinoplasty would not.

Dependent care FSAs cover expenses that allow you or your spouse to work or look for work. This includes daycare for children under 13, preschool programs, after-school care, summer day camps (but not overnight camps), and adult daycare for aging relatives. You can also use dependent care FSA funds for in-home nanny services or babysitting, including amounts you pay to relatives if they provide childcare.

Important expenses that do NOT qualify include health insurance premiums (except certain COBRA payments), cosmetic surgery for non-medical reasons, medications that require a prescription but are purchased over-the-counter without a prescription, and childcare overnight camps. Long-term care insurance premiums and costs for services not related to medical care do not qualify either.

The IRS publishes a detailed list of qualifying expenses, and rules can change annually. Many employers provide lists specific to their FSA plans. When you are uncertain whether an expense qualifies, you can ask your FSA administrator or check the IRS Publication 502.

Practical Takeaway: Make a list of medical and dependent care expenses you expect to incur during the next year. This helps you determine a realistic FSA contribution amount and ensures you only fund expenses that actually qualify under IRS rules.

How to Choose Your FSA Contribution Amount

Selecting how much to contribute to your FSA is one of the most important decisions you make during open enrollment. Contributing too little means you miss out on tax savings, while contributing too much means money may go unused at year's end. This requires honest assessment of your expected expenses.

Start by reviewing your past year of medical and dependent care spending. Look at pharmacy receipts, dental bills, vision care costs, and any copayments or coinsurance you paid. Add up these amounts to get a baseline of what you typically spend. If you are starting a new job or changing FSA amounts for the first time, ask friends or family with similar circumstances about their spending patterns, or estimate based on your known health needs.

Consider changes in your life that might affect expenses. If you are planning to have dental work done, orthodontic treatment, or other procedures in the upcoming year, factor those costs in. If you have a new baby or are starting childcare, dependent care expenses will increase. If you are changing medications or expect more doctor visits, your healthcare spending may be higher.

Be realistic about what you will actually use. Some people overestimate expenses thinking they will use more preventive care or dependent care services than they actually do. Underestimating, on the other hand, means you pay more in taxes because you did not take advantage of the pre-tax savings available to you.

A safe approach for many people is to contribute an amount that covers 70 to 80 percent of your expected annual expenses. This cushion accounts for unexpected costs or changes in your plans. For healthcare FSAs, most financial advisors suggest contributing an amount you are reasonably confident you will spend, since money left in the account at the end of the plan year is typically forfeited (though some plans offer a short grace period or carryover of limited amounts).

For dependent care FSAs, the calculation is often more predictable. If you pay for full-time daycare, you can calculate the annual cost fairly accurately. Multiply your weekly or monthly payment by the number of weeks or months you will use the service. Add in summer camps or backup childcare costs if those apply to you.

Practical Takeaway: Gather receipts and bills from the past 12 months of medical and dependent care spending. Calculate your total, then adjust for expected changes in the upcoming year to arrive at a contribution amount you feel confident about.

The Enrollment Process and Plan Rules You Should Know

FSA enrollment typically happens once per year during your employer's open enrollment period, which is often in autumn for coverage beginning January 1. During this window, you complete enrollment forms through your employer's benefits portal or benefits administrator. You select your FSA contribution amount, choose how to submit claims, and review plan documents.

When you enroll, you should read the Summary Plan Description (SPD) and any plan-specific materials your employer provides. These documents explain important rules that vary by plan, including the grace period or carryover provisions for unused funds. Some plans allow you to carry over up to $610 of unused funds into the next year (this limit changes annually), while others have a grace period of up to 2.5 months after the plan year ends to incur expenses. Many plans have neither option, meaning you truly must use the money during the plan year or lose it.

Your employer determines other plan features as well. Some employers allow mid-year changes to your FSA contribution only if you experience a qualifying life event, such as birth of a child, marriage, divorce, or significant change in childcare costs. Others prohibit changes except during open enrollment. Understanding your plan's change rules helps you avoid contribution mistakes.

When you enroll, you also choose how to submit claims. Most plans issue an FSA debit card that you can use directly at pharmacies, doctor offices, and other healthcare providers. Some plans require you to pay out of pocket and then submit claim forms for reimbursement.