How it works
FSA vs. paying out of pocket
When you contribute to a health FSA through your employer's Section 125 cafeteria plan, those dollars are deducted from your paycheck before federal income tax, Social Security (6.2%), and Medicare (1.45%) are calculated. This triple tax benefit means your $2,000 FSA contribution might only reduce your take-home pay by about $1,400–$1,500, depending on your bracket.
FSA vs. HSA: which saves more?
Both bypass income tax and FICA. The key differences:
| Feature | Health FSA | HSA |
|---|---|---|
| 2026 limit (individual) | $3,300 | $4,300 |
| Requires HDHP? | No | Yes |
| Rollover | $660 carryover or 2.5-mo grace | Unlimited |
| Portable? | No (employer plan) | Yes (your account) |
| Investment growth | No | Yes, tax-free |
If you have access to an HSA-eligible plan, the HSA is generally the stronger long-term vehicle. If your health plan is not HDHP-eligible, the FSA is your best pre-tax medical savings option. See our HSA calculator for the HSA comparison.
Questions
FSA tax savings FAQ
How much does an FSA save on taxes?
An FSA saves you your marginal tax rate plus FICA (7.65%) on every dollar contributed. For someone in the 22% bracket, that means saving about 29.65 cents per dollar. A full $3,300 contribution saves roughly $978 in federal taxes and FICA.
What is the FSA limit for 2026?
The 2026 health care FSA contribution limit is $3,300 per employee per year (IRS Revenue Procedure 2025-32). Some employers also offer a $660 carryover provision, allowing unused funds to roll into the next plan year.
What is the difference between an FSA and an HSA?
An FSA is offered through your employer and generally must be used within the plan year (use-it-or-lose-it, with some carryover or grace period options). An HSA requires a qualifying high-deductible health plan but has no expiration — funds roll over indefinitely and the account is yours even if you change jobs. HSA limits are higher ($4,300 individual / $8,550 family for 2026).
Does an FSA reduce FICA taxes?
Yes. FSA contributions are made through a Section 125 cafeteria plan and are exempt from both federal income tax AND FICA (Social Security + Medicare). This is a key advantage over 401(k) contributions, which reduce income tax but not FICA.
What happens to unused FSA money?
Under the use-it-or-lose-it rule, unused FSA funds are forfeited at the end of the plan year. However, employers may offer either a $660 carryover into the next year, or a 2.5-month grace period to use remaining funds. Check your plan documents.
- Sources: IRS Rev. Proc. 2025-32 (2026 FSA limit $3,300, carryover $660) · IRC Section 125 cafeteria plan rules · SSA 2026 OASDI wage base $184,500.
- 🔄 Last updated July 2026 · Tax year 2026
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