Key takeaways
- For 2026 you can put up to $4,400 (self-only) or $8,750 (family) in an HSA, and up to $3,400 in a health FSA.
- HSA limits rise to $4,500 and $9,000 for 2027. The IRS hadn’t announced the 2027 health FSA limit as of Nov. 2, 2026.
- HSA money is yours to keep and invest for life. Most FSA money must be spent by the plan’s deadline, though employers may allow a carryover of up to $680 into 2027.
- Starting in 2026, bronze and catastrophic plans count as HSA-eligible, opening HSAs to more people who buy their own coverage.
The short answer on HSA vs. FSA: if you’re eligible for a health savings account, it’s usually the better deal. An HSA lets you save more, keeps your money from year to year and can double as a retirement account. A flexible spending account works with almost any employer health plan, but its money generally has to be used within the plan year.
That makes the choice less about which account is “better” and more about which one you can actually use. Eligibility for an HSA depends on your health plan, so the decision often starts during open enrollment, when you’re picking coverage. Here’s how the two accounts compare, what they’re worth in tax savings and how to pick.
HSA vs. FSA: side-by-side comparison
| Feature | Health savings account (HSA) | Health flexible spending account (FSA) |
|---|---|---|
| Who can open one | People covered by an HSA-eligible plan (high-deductible, bronze or catastrophic) with no disqualifying coverage | Employees whose employer offers one |
| 2026 contribution limit | $4,400 self-only / $8,750 family | $3,400 per employee |
| 2027 contribution limit | $4,500 self-only / $9,000 family | Not yet announced (as of Nov. 2, 2026) |
| Catch-up contribution | Extra $1,000 at age 55+ | None |
| Unused money | Rolls over forever | Forfeited unless plan offers a carryover (up to $680 into 2027) or grace period |
| Who owns it | You. It stays with you if you change jobs. | Your employer’s plan. Usually lost when you leave. |
| Can you invest it? | Yes, at most providers once you meet a minimum balance | No |
| Money available | As you contribute | Your full annual election on day one |
| Change contributions midyear? | Yes, anytime | Only with a qualifying life event |
How an HSA works
A health savings account pairs with a high-deductible health plan (HDHP). For 2026, an HDHP must have a deductible of at least $1,700 for self-only coverage or $3,400 for family coverage, and out-of-pocket costs can’t exceed $8,500 or $17,000. For 2027, those thresholds rise to $1,750 and $3,500 for deductibles, and $8,700 and $17,400 for out-of-pocket maximums.
The appeal is what’s often called a triple tax advantage:
- Contributions are tax-free. Payroll deductions skip federal income tax and, in most cases, Social Security and Medicare taxes. If you contribute on your own, you deduct it on your return.
- Growth is tax-free. Interest and investment gains aren’t taxed while they stay in the account.
- Withdrawals for qualified medical expenses are tax-free, whether you take them now or decades from now.
The money never expires. After age 65, you can withdraw it for any reason without the 20% penalty that applies to younger account holders who use it for non-medical costs. You’ll owe income tax on non-medical withdrawals, much like a traditional IRA. Medical withdrawals stay tax-free at any age.
What changed in 2026
The 2025 federal tax law expanded HSA access. Under IRS Notice 2026-5:
- Bronze and catastrophic plans available through the Health Insurance Marketplace are treated as HSA-compatible starting Jan. 1, 2026, even if they don’t meet the standard HDHP definition.
- Direct primary care memberships no longer disqualify you, and you can pay their fees from your HSA. The fee cap for 2027 is $150 a month for an individual and $300 for a family.
- Telehealth before you meet your deductible no longer jeopardizes eligibility. That relief is now permanent.
Watch out: You can’t contribute to an HSA once you enroll in any part of Medicare. You also lose eligibility if you’re covered by a general-purpose health FSA, including a spouse’s. A limited-purpose FSA for dental and vision costs is the exception.
How a health FSA works
A flexible spending account is an employer benefit. You pick an annual amount during open enrollment, up to $3,400 for 2026, and it’s taken from your paychecks before taxes. You can use FSA money for deductibles, copays, prescriptions, dental and vision care, and many over-the-counter health products.
One big perk: under the uniform coverage rule, your entire annual election is available on the first day of the plan year. If you elect $2,400 and need a $2,000 procedure in January, you can pay for it right away, even though you’ve contributed only a sliver so far.
The catch is the “use it or lose it” rule. Money left at the end of the plan year is generally forfeited. Employers can soften that in one of two ways, but not both:
- Carryover: roll over a limited amount. The maximum carryover from 2026 into 2027 is $680.
- Grace period: up to 2½ extra months to spend the prior year’s balance.
Employers can also choose to offer neither. Check your plan documents, not just the IRS maximums.
What each account is worth in tax savings
Let’s say you’re in the 22% federal tax bracket, pay 7.65% in Social Security and Medicare taxes, and pay 5% in state income tax. Each dollar you route through payroll into either account saves about 34.65 cents.
| Contribution (2026) | Approximate annual tax savings |
|---|---|
| HSA, self-only maximum: $4,400 | About $1,525 |
| HSA, family maximum: $8,750 | About $3,032 |
| Health FSA maximum: $3,400 | About $1,178 |
Your numbers will differ by tax bracket and state. A few states, including California and New Jersey, tax HSA contributions at the state level, which lowers the benefit there.
The long-term HSA advantage
Because HSA money can be invested, the gap widens over time. Say you contribute $4,400 a year for 20 years, pay current medical bills out of pocket and earn an average 6% a year. You’d contribute $88,000 and end up with about $161,860, all available tax-free for medical costs in retirement. That return isn’t guaranteed, and investments can lose value, but no FSA can do anything comparable.
The FSA forfeiture risk
Now picture an FSA. You elect $2,000 and spend only $1,200 by year-end. If your plan allows the full $680 carryover, you lose $120. If it has no carryover or grace period, you lose $800. That’s why careful FSA estimates matter more than maxing the account.
Which one should you choose?
An HSA is usually best if you:
- Are relatively healthy and expect modest medical bills.
- Can afford a higher deductible, ideally with an emergency fund in a high-yield savings account to cover it.
- Want another tax-advantaged way to save for retirement after your 401(k) match. See our 401(k) vs. Roth IRA guide for how they fit together.
- Buy your own coverage and choose a bronze or catastrophic plan.
An FSA is usually best if you:
- Have a low-deductible plan, such as a PPO or HMO, that doesn’t qualify for an HSA.
- Expect predictable costs, like ongoing prescriptions, braces or a planned surgery.
- Want access to a large sum early in the year.
Can you have both?
Yes, with limits. If you have an HSA, you can also use a limited-purpose FSA for dental and vision expenses. That lets you save HSA dollars for the long term while covering routine costs with FSA money. A dependent care FSA, which covers child or elder care rather than medical bills, also works alongside an HSA. Its limit rose to $7,500 per household starting in 2026.
Before you switch: Don’t pick a high-deductible plan just to get an HSA. Compare total yearly costs: premiums, plus your expected out-of-pocket spending, minus any employer HSA contribution and your tax savings. Our checklist of the types of insurance you need can help you review coverage at the same time.
Common mistakes to avoid
- Overfunding an FSA. Base your election on last year’s actual spending plus known upcoming costs.
- Leaving HSA money in cash forever. If you won’t need it for years, consider investing part of it in low-cost index funds. Our guide to dollar-cost averaging explains a simple approach.
- Losing receipts. You can reimburse yourself from an HSA years later for expenses incurred after you opened it, but only with records. Save digital copies.
- Contributing after enrolling in Medicare. Stop HSA contributions before Medicare coverage starts to avoid an excess-contribution tax.
- Forgetting your FSA when you change jobs. Submit claims before your last day, since unused funds usually stay with your old employer’s plan.
Frequently asked questions
Is an HSA or FSA better?
If you qualify for both, an HSA usually wins: higher limits, no forfeiture, and the option to invest. An FSA is the better fit if your health plan isn’t HSA-eligible or you have large, predictable medical costs early in the year.
What are the HSA limits for 2026 and 2027?
For 2026, $4,400 for self-only coverage and $8,750 for family coverage. For 2027, $4,500 and $9,000. People 55 and older can add $1,000 each year.
What is the FSA limit for 2026?
$3,400 per employee for a health FSA. The maximum amount that can carry over from 2026 into 2027 is $680, if your employer offers a carryover. The IRS typically announces the next year’s limit in late fall.
What happens to my HSA if I change jobs?
It stays with you. You own the account, so you can keep it with the same provider or transfer it. If your new health plan isn’t HSA-eligible, you can’t add money, but you can still spend what’s there on qualified expenses.
Can I use HSA or FSA money for over-the-counter items?
Yes. Many over-the-counter medicines and menstrual care products qualify without a prescription. Check your plan administrator’s eligible-expense list for specifics.
Next step: review your health plan options at open enrollment, then map your savings goals with our savings calculator and other free calculators.
Sources: IRS Rev. Proc. 2026-24 (2027 HSA and HDHP limits, May 29, 2026); IRS Rev. Proc. 2025-32 (2026 health FSA limit and carryover); IRS Notice 2026-5 (HSA expansion under the 2025 tax law); IRS Publication 969. Tax savings and growth figures were calculated by FinInfoBlog and are illustrative. This article is for educational purposes and isn’t financial or tax advice.