---
title: FSA (flexible spending account) — what it means and why it matters | Allocate AI
description: A pre-tax account through your employer for medical or dependent-care costs that must be used within the plan year or mostly forfeited.
canonical: https://allocateai.io/glossary/fsa
site: Allocate AI — https://allocateai.io
---

# FSA (flexible spending account)

A pre-tax account through your employer for medical or dependent-care costs that must be used within the plan year or mostly forfeited.

A flexible spending account lets you set aside pre-tax money from your paycheck for specific expenses. The health FSA covers medical, dental, and vision costs, including copays, prescriptions, glasses, and many over-the-counter items. The dependent-care FSA covers daycare, preschool, and after-school care for children under 13 or for dependent adults. The IRS sets an annual cap of a few thousand dollars for each type, and your employer may set a lower one.

The tax saving is real. Putting $3,000 into a health FSA saves about $720 of income tax for someone in the 24% bracket plus about $230 of Social Security and Medicare tax, roughly $950 for money you would have spent anyway.

The catch is use-it-or-lose-it. Money not spent by the end of the plan year is forfeited, apart from a small carryover or a short grace period if your employer offers one. That makes the right contribution the amount you are confident you will spend, not the maximum. Dependent-care FSAs have no carryover at all.

An FSA and an HSA are different things. You cannot contribute to a health FSA and an HSA in the same year unless the FSA is a limited-purpose one covering only dental and vision. The common mistake is choosing an FSA out of habit when a high-deductible plan with an HSA would save more and never expire. The second is overestimating spending and losing the balance in December.

## Related terms

- [HSA (health savings account)](https://allocateai.io/glossary/hsa) — A tax-free account for medical costs, available with a high-deductible health plan, with limits of $4,400 for individuals and $8,750 for families (2026).
- [Take-home pay (gross vs net)](https://allocateai.io/glossary/take-home-pay) — The amount that actually reaches your bank account after taxes, insurance, and retirement contributions come out of your gross pay.
- [Sinking fund](https://allocateai.io/glossary/sinking-fund) — Money saved a little each month toward a known future expense, like car insurance, holidays, or a vacation, so the bill is covered when it arrives.

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Allocate AI is a budgeting and financial-planning app: link your accounts, say what you want in plain words, and it writes the plan and stages every change for your approval. Read more at https://allocateai.io or see all pages in https://allocateai.io/llms.txt.