FSA vs. HSA vs. HRA: three acronyms, three very different deals

Open enrollment loves alphabet soup. FSA, HSA, HRA — all three let tax-free dollars pay medical bills, and that's roughly where the similarities end. The differences come down to three questions: whose money is it, does it roll over, and does it follow you out the door. Get these wrong and you can literally forfeit your own paycheck.

HSA: your money, forever

A Health Savings Account is a real account you own, like an IRA. You need an HSA-qualified high-deductible plan to contribute, but the money never expires, rolls over every year, can be invested, and goes with you when you change jobs or retire. Contributions are tax-deductible, growth is tax-free, and qualified withdrawals are tax-free — the famous triple advantage.

FSA: use it or lose it

A Flexible Spending Account is funded through pre-tax payroll deductions, but it's technically your employer's plan, not your account. The catch that defines it: money generally must be used within the plan year. Employers may offer either a grace period (about 2.5 extra months) or a small carryover (in the $600–$660 range, indexed annually) — but never both, and some offer neither. Unused money is forfeited to your employer.

One genuinely great FSA feature: the full annual election is available on day one. Elect $3,200 in January, have LASIK in February, and you can spend all $3,200 immediately even though you've only contributed a few hundred so far. If you then leave the job, you generally don't have to pay the difference back.

HRA: the employer's money, on the employer's terms

A Health Reimbursement Arrangement is 100% employer-funded — you cannot contribute. Your employer promises to reimburse certain medical expenses up to a set amount, under rules they design: what counts, whether unused amounts roll over, and what happens when you leave (usually: it vanishes). It's a nice perk, but it's a promise, not a portable pot of money.

Head-to-head

• Ownership: HSA — you. FSA — employer plan with your money in it. HRA — employer entirely.
• Rollover: HSA — always, forever. FSA — limited or none. HRA — only if the employer allows.
• Portability: HSA — fully portable. FSA — stays behind (COBRA sometimes applies). HRA — almost never portable.
• Investing: HSA — yes. FSA and HRA — no.
• Eligibility: HSA — requires an HDHP. FSA and HRA — any plan, if the employer offers them.

The bottom line

If you're eligible for an HSA, it's the best deal in the group and the only one that builds wealth. Use an FSA as a targeted discount on expenses you can predict to the dollar. Treat an HRA as a nice employer perk you spend eagerly, because it was never really yours. Whose money is it? — answer that, and the right strategy falls out.

The comparison in one table

Open enrollment strategy by situation

The right combination depends on your plan menu and your year. Choosing an HDHP? Take the HSA, contribute at least enough to capture any employer seed, and add a limited-purpose FSA only if you have predictable dental or vision spending — braces and LASIK are the classic cases. On a traditional PPO with no HSA access? A healthcare FSA sized to your known expenses (last year's out-of-pocket total is a good starting estimate, trimmed 20% for safety) is a guaranteed 22–35% discount on money you were spending anyway. Offered an HRA on top of either? Learn its exact reimbursement rules and spend it first, before your own dollars, since it evaporates when you leave.

One planning trap deserves its own warning: the FSA's use-it-or-lose-it deadline meets human procrastination badly. Every December, FSA administrators watch a stampede of last-minute glasses orders and drugstore runs. Avoid the scramble by checking your balance on October 1 and booking any needed dental work, eye exams, or stocked-up prescriptions with two months of slack. And if you change jobs mid-year, remember the asymmetries: spend your FSA balance before your last day (you keep the full election even if you have not contributed it all), roll your HSA with you untouched, and submit any HRA claims before the door closes behind you. Three accounts, three completely different exit protocols — the family that knows them keeps every dollar; the family that does not donates a few hundred back to their employer on the way out.

If you take one habit from this article, make it the pre-enrollment inventory: fifteen minutes each fall listing next year's predictable health spending — prescriptions, glasses, dental work, therapy, planned procedures — before touching any election form. Every account in the alphabet soup is a discount on known expenses; none of them reward guessing. The list converts the enrollment portal from a quiz you might fail into a simple matching exercise, and it is the difference between these accounts saving you a thousand dollars and costing you a forfeited balance.