Flexible Spending Account (FSA)

An FSA lives inside your employer’s cafeteria plan, so you can have one only through a job; self-employed people can’t. During open enrollment you choose an annual amount, and your employer deducts an equal slice from each paycheck. That money is a pre-tax contribution: it skips federal income tax and Social Security and Medicare tax, and it never shows up in your taxable wages.

To get money back, you submit a claim, or swipe a benefits debit card, backed by a third-party statement of what was spent. The expense must fall within the coverage period, and the plan can’t pay you in advance for costs you haven’t incurred yet.

A health FSA has an unusual feature called the uniform coverage rule: your whole annual election is available from the first day of the plan year, even before you have contributed it. Elect $3,400, need surgery in January, and the plan must reimburse the full amount. A dependent care FSA isn’t covered by that rule, so it typically pays out only what has been deducted so far.

The election is locked for the year. You can change it midyear only after a change in status that your plan recognizes, such as marriage, divorce, a birth or adoption, or a job change for you, your spouse or a dependent.

Employers can offer three kinds, and each has its own rules. A general health FSA reimburses medical, dental and vision costs that would qualify for the medical deduction, including over-the-counter medicines and menstrual care products, for you, your spouse, your dependents and your children under 27. It can’t pay health insurance premiums or long-term care.

A limited-purpose FSA pays only dental, vision and preventive care. That narrow scope is the point: it is the version you can hold alongside a health savings account, since a general health FSA would disqualify you from contributing to one.

A dependent care FSA is not health coverage at all. It reimburses care for a child under 13, or for a spouse or dependent who can’t care for themselves and lives with you more than half the year, so that you, and your spouse if married, can work. Day care, before- and after-school care, a nanny and day camp can qualify; overnight camp and school tuition don’t. The rules closely track those for the child and dependent care credit.

The health FSA limit is set per employee, not per household. If you and your spouse each have access to a health FSA, you can each elect up to the full amount, even at the same employer, and employer flex credits don’t count against it unless you could take them as cash. The dependent care limit works the opposite way: it is one ceiling for the whole household, and it can’t exceed the earned income of the lower-earning spouse. The main 2026 figures:

The use-it-or-lose-it rule sounds harsh, but the tax saving gives you a cushion. Every dollar you elect saves your combined tax rate: your federal marginal rate, your state rate, and 7.65% of FICA on wages below the Social Security wage base. At 22% federal plus FICA, that is 29.65 cents per dollar. You break even if you forfeit no more than that share of your election, so spending at least about 70% of it still leaves you ahead.

The practical approach is to count only costs you can predict: your deductible, regular prescriptions, glasses or contacts, scheduled dental work and orthodontia payments. Treat the health FSA like a sinking fund for known bills rather than insurance against surprises, and check whether your plan offers the $680 carryover or a grace period, which shrinks the risk further.

One quiet trade-off: because FSA dollars escape Social Security tax, they also don’t count toward your Social Security earnings record. For most workers the effect on a future benefit is small.

You can’t use the same dollars twice. The child and dependent care credit applies to up to $3,000 of care costs for one qualifying person or $6,000 for two or more, and every dollar you exclude through a dependent care FSA reduces that limit. With the 2026 FSA ceiling at $7,500, a family that uses the full amount has no expenses left for the credit.

For 2026 the credit rate starts at 50% and falls by one point for each $2,000 of adjusted gross income above $15,000, down to 35%. It then falls again, by one point per $2,000 above $75,000, or per $4,000 above $150,000 on a joint return, to a floor of 20%. Because the FSA also avoids FICA, it usually wins for middle and higher earners. At lower incomes the credit’s higher rate can come out ahead, but it is nonrefundable, so it only helps if you owe enough tax. The worked example below compares the two for one family.