Updated 27 March 2026
HSA vs FSA
The HSA is the only account in the US tax code with triple tax benefits: deductible contributions, tax-free growth, and tax-free withdrawals. The FSA is use-it-or-lose-it. If you qualify for an HSA, choose it.
Side-by-Side
| Feature | HSA | FSA |
|---|---|---|
| Eligibility | Must have HDHP (high-deductible health plan) | Any employer-sponsored health plan |
| 2026 contribution limit (single) | $4,300 | $3,300 |
| 2026 contribution limit (family) | $8,550 | $3,300 (per employee, not family) |
| Catch-up (55+) | +$1,000 | None |
| Tax on contributions | Tax-deductible (reduces taxable income) | Pre-tax (reduces taxable income) |
| Tax on growth | Tax-free (can invest in stocks, bonds) | N/A (does not grow) |
| Tax on withdrawals | Tax-free for medical expenses | Tax-free for medical expenses |
| Rollover | 100% rolls over. No expiration. Ever. | Use-it-or-lose-it. Max $640 rollover or 2.5-month grace period. |
| Portability | Yours. Take it to any job or retirement. | Tied to employer. Lose it when you leave. |
| Investment options | Yes (stocks, bonds, mutual funds after threshold) | No. Cash account only. |
| After age 65 | Withdraw for any purpose (taxed like 401k). Medical withdrawals still tax-free. | Still use-it-or-lose-it. |
| Who owns the account | You | Your employer |
HSA Tax Savings by Income
| Income | Tax Bracket | HSA Contribution | Annual Tax Saved |
|---|---|---|---|
| $50,000 | 22% | $4,300 | $1,268 |
| $80,000 | 22% | $4,300 | $1,268 |
| $120,000 | 24% | $4,300 | $1,361 |
| $200,000 | 32% | $4,300 | $1,705 |
| $200,000 (family) | 32% | $8,550 | $3,390 |
The HSA as a Retirement Account
The HSA's most powerful feature is not medical expense reimbursement. It is retirement investing. After you contribute to your HSA, you can invest the balance in stocks and bonds (most HSA providers offer this once you reach a $1,000-$2,000 threshold).
The money grows tax-free for decades. At age 65, you can withdraw for any purpose (taxed like a traditional IRA) or continue to use it tax-free for medical expenses. Medical expenses in retirement are substantial: the average couple spends $315,000 on healthcare after age 65.
Maxing out an HSA at $4,300/year for 30 years with 7% average returns = approximately $430,000 in tax-free medical money. No other account offers this combination of tax benefits.
When to Choose the FSA Instead
You do not have an HDHP
HSAs require a high-deductible health plan. If your employer only offers PPO or HMO plans, the FSA is your only option for pre-tax medical savings.
You have predictable, high medical expenses this year
If you know you will spend exactly $3,000 on medical expenses (planned surgery, orthodontics), the FSA guarantees you use the full amount. With an HSA, the higher deductible means more out-of-pocket before insurance kicks in.
Dependent Care FSA (separate from health FSA)
You can have BOTH an HSA and a Dependent Care FSA ($5,000/year for childcare). These are separate accounts with separate purposes. Do not confuse them.