What Is Flexible Spending Account? Key Information

A flexible spending account is a tax-advantaged account offered by many employers that lets you set aside part of your paycheck, before taxes are taken out, to pay for certain health or dependent care costs. The money goes in pre-tax, which lowers your taxable income, and you withdraw it to cover eligible expenses. The catch is that these accounts come with strict rules about deadlines and how much you can carry over, so understanding them before you enroll matters.

What Is a Flexible Spending Account and How Does It Work?

A flexible spending account, usually shortened to FSA, is an employer-sponsored benefit. You decide during an annual enrollment period how much to contribute for the coming year. That amount is then deducted from your pay in equal installments across the year, and the money is not subject to federal income tax or Social Security and Medicare taxes.

Because contributions are pre-tax, an FSA effectively stretches your dollars. If you are in a higher tax bracket, the savings on each dollar you spend through the account are larger. The trade-off is that the account is use-it-or-lose-it in most cases, meaning money you do not spend by the plan’s deadline can be forfeited.

There are two main types of FSAs. A health care FSA covers medical, dental, vision, and prescription costs. A dependent care FSA covers things like daycare, before- and after-school care, and day camp for a qualifying child or dependent adult. Some employers offer both, and they operate under different rules.

One detail that surprises many people: your full annual election is often available from day one. If you elect $2,000 for the year, you may be able to spend the entire $2,000 in January even though you have only contributed a fraction of it through payroll so far. Employers are allowed to offer this, and many do. The reverse is also true for dependent care FSAs, where you can generally only be reimbursed up to what you have actually contributed at that point.

What Expenses Can You Pay For With an FSA?

Health care FSA funds can be used for a broad range of medical costs. The IRS sets the general categories, and your employer’s plan documents define the specifics.

Common eligible health care expenses include:

• Doctor visits, hospital care, and surgery copays
• Prescription medications
• Dental care, including cleanings, fillings, and braces
• Vision care, including exams, glasses, and contact lenses
• Hearing aids and some hearing services
• Certain medical equipment and supplies

Over-the-counter medications are generally eligible only if you have a prescription for them, though this rule has shifted over time and depends on current tax law and your plan. Some plans allow over-the-counter medicines without a prescription. Check your plan’s list before you assume a purchase qualifies.

Dependent care FSA funds cover a different set of costs. These generally include daycare, preschool, before- and after-school programs, and day camps for children under age 13, as well as care for a spouse or dependent who cannot care for themselves. Overnight camps and care provided by your own dependent are typically not eligible.

Cosmetic procedures, gym memberships, and most vitamins are usually not eligible for health FSA reimbursement. The rules vary by plan, so the plan’s own eligible expense list is the final word.

How Much Can You Contribute to an FSA?

The IRS sets an annual limit on how much you can put into a health care FSA, and that limit is adjusted periodically for inflation. Your employer may set a lower limit, but it cannot allow more than the federal maximum for the year.

The dependent care FSA limit is separate and typically much lower. It is also tied to your tax situation. If you are married and file jointly, the limit generally applies to the household, and it can be further reduced if your spouse also has access to a dependent care account or if your income is low enough that you owe little tax.

Because these limits change and depend on the tax year, the exact figures for the current year should be confirmed with your employer’s benefits team or the IRS. Do not rely on a number you remember from a prior year.

There is also a rule that prevents you from using an FSA and certain other tax-advantaged accounts for the same expense. You cannot double-dip, so you cannot submit the same receipt to both a health FSA and a health savings account.

What Happens to Unused FSA Money?

This is where FSAs differ most from other savings accounts. In general, money you do not spend by the end of the plan year is forfeited. That is the use-it-or-lose-it rule.

Many employers offer one of two forms of relief. One is a grace period, which extends the deadline to incur new expenses by a set number of months into the next year. The other is a carryover, which lets you roll a limited amount of unused funds into the next plan year. An employer can offer one or the other, but not both, and some offer neither.

The practical effect is that you should estimate your expenses carefully. Underfunding means you miss out on tax savings. Overfunding means you risk losing money you cannot spend in time. If your situation is uncertain, contributing a conservative amount is usually the safer approach.

There is one important exception to the forfeiture rule. If you leave your job or retire, you generally have a limited window to submit claims for expenses incurred before your coverage ended. After that, remaining funds are typically lost.

How Does an FSA Compare to an HSA?

Both accounts let you pay for medical costs with pre-tax money, but they work differently. A health savings account, or HSA, is only available to people enrolled in a high-deductible health plan. An FSA is available through many employer plans regardless of deductible level.

The biggest difference is what happens to the money over time. HSA funds are yours to keep and can be invested, and they roll over year after year with no forfeiture. FSA funds generally must be spent within the plan year or its limited extension. HSAs are also portable, meaning they stay with you if you change jobs. FSAs generally do not.

HSA contributions also have a tax advantage on the way out, since withdrawals for qualified medical expenses are tax-free, and the account can function as a long-term savings vehicle for future medical costs. An FSA is better suited to predictable, near-term expenses.

If you have access to both, the general guidance is to prioritize the HSA for its long-term flexibility and use the FSA only for expenses you are confident you will incur during the year. Some people use both, but the same expense cannot be reimbursed twice.

Who Should Consider an FSA?

An FSA tends to make sense for people with predictable medical or dependent care costs. If you know you will spend a certain amount on prescriptions, dental work, or daycare, routing those dollars through the account can reduce your taxable income.

It makes less sense if your expenses are unpredictable or minimal. Someone with few medical costs and no dependents in care may find the forfeiture risk outweighs the tax benefit.

Before enrolling, it helps to review last year’s spending on medical and dependent care. That gives you a realistic baseline. Then decide whether the tax savings justify locking the money into an account with a deadline.

Also check whether your employer contributes to the FSA. Some do, which adds value. And confirm the plan year dates, the grace period or carryover rules, and the deadline for submitting claims, because these details vary widely from one employer to the next.