Both HSAs and FSAs let you pay for medical expenses with pre-tax dollars — saving you 20–30% on healthcare costs. But they work very differently, and choosing wrong can cost you thousands.
The 30-Second Summary
- HSA (Health Savings Account): You own it. Money rolls over forever. Earns interest. Travels with you. BUT requires a high-deductible health plan.
- FSA (Flexible Spending Account): Employer-owned. Use it or lose it (mostly) by year-end. No HDHP requirement. Loaded with full annual amount upfront.
Detailed Comparison
| Feature | HSA | FSA |
|---|---|---|
| 2026 contribution limit | $4,300 (single) / $8,550 (family) | $3,300 (single) |
| Requires HDHP? | Yes — required | No — works with any plan |
| Roll over each year? | Yes — forever | Mostly no (limited carryover) |
| Earns interest/grows? | Yes — can be invested | No |
| You own it? | Yes — even if you change jobs | No — employer owns |
| Catch-up contributions (55+) | +$1,000/year | No |
| Available upfront? | Only what you've contributed | Full annual amount day 1 |
The HSA Triple Tax Advantage
HSAs are arguably the best tax-advantaged account in the IRS code:
- Tax-deductible going in: Contributions reduce your taxable income.
- Tax-free growth: Earnings and investment gains are not taxed.
- Tax-free withdrawals: When used for qualified medical expenses.
Plus, after age 65, you can withdraw HSA funds for any purpose (just pay normal income tax) — making it a stealth retirement account.
When to Choose HSA
- You have a high-deductible health plan (HDHP)
- You're generally healthy and don't expect huge medical bills
- You want long-term tax-advantaged savings
- You can afford to leave money in the account to grow
- You want to use it as a stealth retirement account
When to Choose FSA
- Your plan isn't HDHP-compatible
- You have predictable yearly medical expenses
- You need the full year's funds available immediately (e.g., for braces or planned surgery)
- Your employer offers an FSA match or contribution
What Counts as a Qualified Medical Expense?
Both HSA and FSA cover the same broad list of expenses (per IRS Publication 502):
- Doctor and dentist visits, copays, deductibles, coinsurance
- Prescription drugs and over-the-counter medications
- Vision: glasses, contacts, eye exams, LASIK
- Mental health treatment and therapy
- Chiropractic, acupuncture
- Medical equipment, crutches, bandages
- Sunscreen (SPF 30+), menstrual products, breast pumps
- Long-term care insurance premiums (HSA only, with limits)
FSA "Use It or Lose It" Rule
Most FSAs require you to spend the funds by year-end or forfeit them. Some employers offer:
- Carryover: Up to $660 (2026 limit) rolls over to next year.
- Grace period: Extra 2.5 months to spend prior-year funds.
You get one or the other, never both. Check your plan documents.
Need help choosing the right plan to qualify for an HSA? Our licensed agents can find you an HDHP that maximizes your tax savings. Get a free HSA-eligible plan quote →