HSA vs FSA vs HRA: The 14-Point Comparison for Employers Who Have to Pick One (or Two)
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Here are the 14 ways an HSA, a health FSA, and an HRA actually differ, side by side, from who owns the money to what breaks in January. Short version: the HSA is the employee’s account and needs a high-deductible plan. The FSA is a pre-tax election that expires. The HRA is the employer’s promise to pay, on the employer’s terms. Most employers under 500 people end up with two of the three.
Three accounts, three letters, and every employee thinks they’re the same thing. They are not. Two of them can’t be combined. One of them makes you a claims processor. One of them can turn into a retirement account if anybody explains it.
Here’s the table first, then the fourteen points behind it.
| HSA | Health FSA | HRA | |
| Who owns the money | Employee | Employer (until spent) | Employer |
| Who contributes | Employee, employer, anyone | Employee (pre-tax); employer may add | Employer only |
| 2026 limit | $4,400 single / $8,750 family (+$1,000 at 55) | $3,400 | No statutory cap (except special HRA types) |
| 2027 limit | $4,500 / $9,000 (+$1,000) | Announced ~Oct 2026 | Same |
| Unused money | Rolls over forever | Forfeited (except carryover up to $680 or 2.5-month grace) | Employer decides; usually rolls within plan, lost at termination |
| Leaves with the employee | Yes | No (COBRA possible) | No (COBRA required) |
| Can be invested | Yes | No | No |
| Required health plan | HDHP only | Any | Any (must be integrated with group coverage) |
| Pairs with an HSA | — | Only limited-purpose | Only post-deductible or limited-purpose |
| Testing | Section 125 (or comparability) | Section 125 + §105(h) | §105(h) |
| Who handles claims | Employee (self-substantiated) | Administrator (receipt required) | Administrator (receipt required) |
| Non-medical use | Allowed, 20% penalty before 65 | Never | Never |
Sources: IRS Publication 969; Rev. Proc. 2026-24; Rev. Proc. 2025-32; 26 CFR §54.9815-2711.
How do the three accounts actually differ?
1. Who owns the money
The HSA belongs to the employee, like a bank account. FSA and HRA dollars belong to the employer until they’re spent on an eligible claim (IRS Publication 969).
This one point explains almost every other difference. It’s why the HSA rolls over and the others don’t, why the HSA goes with the employee and the others don’t, and why the employee can invest one and not the others. When someone asks “what’s the real difference,” start here.
Action: Open every account explanation with the ownership sentence before you say anything about taxes.
2. Who can put money in
Anyone can fund an HSA: the employee, the employer, a parent, a spouse. The FSA is the employee’s pre-tax election, and the employer may add to it. The HRA is employer money only; employees can’t contribute a dollar (IRS Publication 969).
The practical difference: an HSA seed and an HSA payroll deduction land in the same bucket and count against the same limit. An FSA employer contribution has its own rules and doesn’t count against the $3,400 employee limit if it’s non-elective.
Action: If you seed HSAs, set payroll caps at the limit minus the seed. If you add to FSAs, confirm with your administrator whether it’s elective or non-elective.
3. The annual limits
For 2026, the HSA limit is $4,400 self-only and $8,750 family; the health FSA limit is $3,400 (Rev. Proc. 2025-19 and Rev. Proc. 2025-32, 2025). For 2027 the HSA moves to $4,500 and $9,000 (Rev. Proc. 2026-24, 2026); the 2027 FSA number arrives in October. A standard HRA has no statutory limit.
Notice the timing. HSA limits come out 18 months early. FSA limits come out six weeks before OE. Every year somebody prints the FSA number from the prior year on the first OE draft.
Action: Put “FSA limit TBD until October” on your OE draft template so it can’t be forgotten.
If you have to explain “why is the HSA limit bigger than the FSA limit” in a live meeting, The Plain-English HSA has the plain-words version. One page, free.
4. What happens to unused money
HSA money rolls over forever. FSA money is forfeited at year-end unless the plan offers a carryover (up to $680 for 2026) or a 2.5-month grace period, never both. HRA money rolls over only if the employer’s plan says so, and it stops at termination (IRS Publication 969).
The “use it or lose it” rule is the reason employees under-elect FSAs and the reason they’re scared of HSAs. They think all three work the same. The single most valuable sentence in your OE meeting is “the HSA is not use-it-or-lose-it.”
Action: Say that sentence twice at OE and put it on the HSA slide in bold.
5. What leaves with the employee
An HSA goes with the employee to their next job, retirement, or the beach. An FSA balance is gone at termination unless the employee elects COBRA on it. An HRA balance stays with the employer, and the employer has to offer COBRA on it (DOL COBRA guidance).
Nobody expects the COBRA part. Both the FSA and the HRA are group health plans, and both trigger COBRA notices at termination. A terminated employee with $2,000 left in their HRA is entitled to keep it under COBRA, and your COBRA vendor needs to know.
Action: Confirm your COBRA administrator is set up to offer the FSA and HRA at termination, not just the medical plan.
6. Whether the money can grow
Only the HSA can be invested. Most HSA custodians let employees move money into mutual funds once they pass a cash floor, often $1,000 to $2,000. FSA and HRA dollars sit as a promise on the employer’s books; there’s nothing to invest (IRS Publication 969).
And yet only 18% of HSA holders invested any of their balance in 2024 (EBRI, 2026). The feature exists; nobody’s using it.
Action: Tell employees the investment floor and where the button is. That one sentence moves the 18%.
7. How each one is taxed
HSA contributions go in pre-tax, grow tax-free, and come out tax-free for medical expenses: the triple tax advantage. FSA contributions go in pre-tax and come out tax-free, but there’s no growth. HRA reimbursements are tax-free to the employee and deductible to the employer (IRS Publication 969).
One more HSA detail: non-medical withdrawals are allowed with income tax plus a 20% penalty before 65, and just income tax after. That’s what makes it a retirement account in disguise. Neither of the other two can do that.
Action: Explain the “after 65, it’s an IRA” rule to anyone over 50 in the room. It changes their election.
Which account requires which plan?
8. The HSA needs an HDHP; the others don’t
An employee can only contribute to an HSA while covered by a qualifying high-deductible health plan, with a 2027 minimum deductible of $1,750 single or $3,500 family (Rev. Proc. 2026-24, 2026). An FSA works alongside any medical plan. An HRA must be integrated with group coverage but doesn’t care what kind.
This is the decision that forces your hand. If you’re keeping a PPO and a low deductible, the HSA is off the table for those enrollees. If you’re moving everyone to an HDHP, the FSA has to become limited-purpose or go away.
Action: Decide the plan lineup first, then the account. Not the other way around.
9. Which ones can be combined
An HSA can sit next to a limited-purpose FSA (dental and vision) or a post-deductible HRA. It cannot sit next to a general-purpose FSA or a general-purpose HRA, because both pay before the deductible (IRS Publication 969). An FSA and an HRA can coexist; the plan document says which pays first.
The most common setup for a 50-to-500-person employer that offers an HDHP and a PPO: HSA for HDHP enrollees, general-purpose FSA for PPO enrollees, limited-purpose FSA for anyone who wants both. Three account types, one vendor, one Section 125 document.
Action: If you offer both plans, make sure the enrollment system blocks an HDHP-plus-general-FSA election automatically.
10. Who gets tested for what
HSA contributions through a cafeteria plan are tested under Section 125. FSAs are tested under Section 125 and §105(h). HRAs are self-insured health plans and are tested under §105(h) alone.
The §105(h) test is the one small employers forget, because the FSA vendor runs 125 testing and nobody runs 105(h). If the HRA gives more to management, or only management is eligible for it, highly compensated employees lose the tax exclusion on their reimbursements.
Action: Ask your administrator in writing which tests they run and which they don’t. Assume the ones they don’t mention aren’t happening.
What breaks operationally with each one?
11. HSA: eligibility policing
The HSA’s operational problem is eligibility. The employee, not the employer, is responsible for being eligible, but the employer is the one who set up the payroll deduction and deposited the seed. A spouse’s FSA, a Medicare backdate, or a mid-year coverage change turns good contributions into excess with a 6% penalty (IRS Form 8889 instructions).
The fix is five questions on the election form (spouse FSA, own FSA carryover, other coverage, Medicare timing, adult-child status) and a funded-vs-elected report 30 days into the year. That’s the whole job.
Action: Add the five questions to the HSA election before OE opens.
12. FSA: substantiation, forfeitures, and the uniform coverage rule
The FSA’s operational problems are receipts and risk. Every claim needs substantiation, the administrator chases employees for it, and unspent money is forfeited. And under the uniform coverage rule, the employee’s full annual election is available on day one, so an employee who elects $3,400, spends it in January, and quits in February leaves the employer holding the loss (26 CFR §1.125-5).
Employers get the forfeitures and eat the early-termination losses. Some years it nets out; some years it doesn’t.
Action: Track FSA forfeitures and uniform-coverage losses as two separate lines so you know which way your plan runs.
13. HRA: you’re a claims processor now
The HRA’s operational problem is that it’s a self-insured health plan. It needs a plan document, a summary plan description, claims processing with receipts, COBRA at termination, and usually a Form 5500 if it has 100 or more participants (DOL reporting requirements). It also has to be integrated with the group medical plan under 26 CFR §54.9815-2711 or it violates the ACA’s annual limit ban.
Employers pick the HRA because “we keep the money.” Then they discover that keeping the money means adjudicating claims, answering “is this covered” emails, and filing a 5500.
Action: Before you set up an HRA, get a written quote for administration. If nobody’s administering it, you are.
Which one should a 50-to-500 employer pick?
14. The decision matrix
There’s no single right answer, but there’s a right answer for each goal.
| If your main goal is… | Pick | Because |
| Lower premiums and you’re moving to an HDHP | HSA (+ limited-purpose FSA) | Only account that fits an HDHP; employees keep the money |
| Keep the PPO, give employees pre-tax help with copays | General-purpose FSA | No plan change needed; simplest to explain |
| Move to an HDHP but employees are scared of the deductible | HSA with a January seed | Seed covers early bills; account still portable |
| Keep every dollar in-house and control what it pays for | HRA | Employer money, employer rules; accept the admin load |
| Employees want both flexibility and portability | HSA + limited-purpose FSA | Dental and vision pre-tax without breaking HSA eligibility |
| You have under 50 employees and no group plan | QSEHRA (special HRA type) | Reimburses individual premiums; separate rules apply |
Action: Circle your goal in the left column. The answer is on the right. Then read items 11, 12, and 13 for what you just signed up for.
Nobody told me that the account decision matters less than the sentence I use to explain it. Employees don’t pick between an HSA and an FSA on features. They pick on fear, and the fear is always “will I lose the money?” Answer that first, in one sentence, and the rest of the table takes care of itself.
What to do first
- Lock the plan lineup for 2027 before you touch the account question. The plan decides the account.
- If you’re adding an HDHP, add a limited-purpose FSA at the same time so nobody has to choose between dental and the HSA.
- Ask your administrator which nondiscrimination tests they run. In writing.
- If you’re considering an HRA, price the administration before you price the benefit.
- Grab The Plain-English HSA for the “it’s not use-it-or-lose-it” script. Free.
- If you’re about to announce an account change to employees, the free Steal My OE Emails toolkit has the five templates, including the “we’re switching plans” one.
- Brand new to running benefits and this is your first OE? The 90-Day Playbook is the in-order version of your first quarter. If you’re deep in OE build already, the Open Enrollment Mastery Kit has the rate calculator and the timeline.
FAQ
Q: What is the main difference between an HSA, FSA, and HRA? A: The HSA is an employee-owned account that rolls over and requires a high-deductible plan. The FSA is a pre-tax employee election that mostly expires at year end. The HRA is employer-owned money reimbursed on the employer’s terms.
Q: Can you have an HSA and an FSA at the same time? A: Only if the FSA is limited-purpose (dental and vision). A general-purpose health FSA disqualifies HSA contributions.
Q: Can an employer offer an HRA with an HSA? A: Yes, if the HRA is post-deductible or limited-purpose. A general-purpose HRA that pays before the HDHP deductible blocks HSA eligibility.
Q: Does COBRA apply to FSAs and HRAs? A: Yes. Both are group health plans, so terminated employees must be offered COBRA continuation on them, subject to the usual rules.
Q: Which is better for a small employer, HSA or HRA? A: If you’re moving to an HDHP and want employees to keep the money, the HSA. If you want to keep control of the dollars and can handle claims administration, COBRA, and 105(h) testing, the HRA.
This is the plain-English version to get you oriented, not legal or tax advice. Before you act on any of it, confirm the specifics with your broker, your benefits counsel, or your filing software. My job here is to make it make sense, not to be your lawyer.
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