US Healthcare · Money Tools & Research
HSAs, FSAs, and HRAs
How health savings accounts (HSAs), flexible spending accounts (FSAs), and health reimbursement arrangements (HRAs) work — eligibility, uses, carryover rules, and key differences.
Employees and self-employed individuals who want to use tax-advantaged accounts to cover medical expenses — or who want to understand what their employer offers and how to maximize it.
Health Savings Accounts (HSAs), Flexible Spending Accounts (FSAs), and Health Reimbursement Arrangements (HRAs) are three types of tax-advantaged accounts designed to help people cover out-of-pocket healthcare costs. Each works differently, has different eligibility rules, and suits different situations. Understanding the differences helps you choose and use the right account.
Health Savings Accounts (HSAs)
An HSA is a personal savings account that you own and that can be used for qualified medical expenses. The defining requirement is that you must be enrolled in a High-Deductible Health Plan (HDHP) to contribute to an HSA.
What is an HDHP? The IRS sets minimum deductible thresholds and maximum out-of-pocket limits that a plan must meet to qualify as an HDHP. These thresholds are adjusted annually — check IRS Publication 969 or the IRS website for current figures. HDHPs typically have lower monthly premiums than standard plans, with higher initial out-of-pocket costs.
HSA tax advantages — triple benefit:
- Contributions to your HSA are tax-deductible (if you make them yourself) or pre-tax (if made through payroll deduction)
- Money in the HSA grows tax-free — interest, dividends, and investment gains are not taxed
- Withdrawals for qualified medical expenses are entirely tax-free
This triple tax advantage makes the HSA particularly valuable for people who can afford to pay some current medical expenses out of pocket while letting their HSA balance grow.
Contributions: Annual contribution limits are set by the IRS and adjusted for inflation each year. There are separate limits for self-only and family HDHP coverage, and a higher catch-up contribution limit for individuals aged 55 and older. Check the current-year limits at irs.gov before contributing.
Rollover: HSA funds roll over from year to year without limit. There is no use-it-or-lose-it deadline. This means you can accumulate a substantial balance over years of contributions and invest it — many HSA providers allow account holders to invest balances in mutual funds or ETFs once the balance exceeds a threshold.
After age 65: Once you enroll in Medicare, you can no longer make new HSA contributions. However, you can continue to use accumulated HSA funds for qualified medical expenses tax-free. After age 65, you can withdraw funds for any purpose without the 20% penalty that applies to non-medical withdrawals before 65 — though the withdrawal will be subject to ordinary income tax.
Account ownership: The HSA belongs to you, not your employer. If you change jobs, your HSA stays with you.
Flexible Spending Accounts (FSAs)
An FSA is an employer-established benefit account that allows you to set aside a portion of your paycheck before taxes to pay for qualified medical expenses. Key features:
No HDHP requirement: Unlike HSAs, you do not need to be enrolled in an HDHP to use an FSA. You can have an FSA with any employer-sponsored health plan.
Employer-controlled: FSAs are set up and administered by your employer. When you leave a job, you typically lose access to any unused FSA balance (your employer retains it). The annual contribution amount is set when you elect the benefit during open enrollment and generally cannot be changed mid-year except following a qualifying life event.
Use-it-or-lose-it: This is the most significant limitation of FSAs. Money you contribute that is not spent on qualified expenses by the end of the plan year is generally forfeited. Employers have the option to offer one of two accommodations:
- A grace period of up to a certain number of months after the plan year ends
- A limited carryover of a specified amount (set by the IRS) to the next plan year
Not all employers offer either option — ask your benefits administrator whether your FSA has a grace period, carryover, or neither.
Dental and vision FSAs: Some employers offer standalone dental or vision FSAs, or allow FSA funds to be used for dental and vision in addition to medical expenses. These work similarly to general purpose FSAs.
Dependent care FSAs: A separate type of FSA for daycare, preschool, and other dependent care expenses — not for medical expenses. Different annual limits apply.
Health Reimbursement Arrangements (HRAs)
An HRA is an employer-funded account used to reimburse employees for qualified medical expenses and sometimes insurance premiums. Key features:
Entirely employer-funded: Employees cannot contribute to an HRA — it is funded entirely by the employer.
Several types exist:
- Integrated HRAs: Used alongside a group health plan, reimbursing out-of-pocket expenses
- Individual Coverage HRA (ICHRA): Employers reimburse employees for premiums and qualified expenses on individual health plans purchased on the Marketplace — allows employers to offer tax-advantaged health benefits without sponsoring a group plan
- Excepted Benefit HRA (EBHRA): A small employer-funded account for limited expenses like dental, vision, or COBRA premiums
Reimbursement, not an account: HRA funds do not accumulate in an account you own — you submit receipts or claims for reimbursement from the employer’s HRA. Unused funds typically revert to the employer at year-end unless the employer specifically allows rollover.
Choosing between them
If your employer offers a choice, key considerations:
| Feature | HSA | FSA | HRA |
|---|---|---|---|
| Requires HDHP | Yes | No | No |
| Who funds it | You + employer | You | Employer only |
| Rollover | Unlimited | Limited | Employer decides |
| Portable on job change | Yes (you own it) | No | No |
| Investment option | Often yes | No | No |
If you are enrolled in an HDHP and can afford to pay some expenses out of pocket in the short term, an HSA with investment of accumulated funds is often the most advantageous long-term tool. If you are not enrolled in an HDHP or want to set aside predictable amounts for expected expenses, an FSA may be the right fit.
Key terms
| Term | Plain meaning | Glossary |
|---|---|---|
| HSA | Health Savings Account — tax-advantaged account for those with HDHP plans, funds roll over indefinitely | → |
| FSA | Flexible Spending Account — employer-sponsored tax-advantaged account, often with use-it-or-lose-it rules | → |
| HDHP | High-Deductible Health Plan — the required insurance type for HSA eligibility | → |
| Deductible | The amount you pay before insurance covers costs — HDHPs have higher deductibles than standard plans | → |
| ACA | Affordable Care Act — regulates what counts as an HDHP and what plans can be combined with HSAs | → |
Common questions
- What is an HSA and who can open one?
- A Health Savings Account (HSA) is a tax-advantaged account you can use to pay for qualified medical expenses. To open an HSA, you must be enrolled in a High-Deductible Health Plan (HDHP), not be enrolled in any other non-HDHP health coverage, not be enrolled in Medicare, and not be claimed as a dependent on someone else's tax return. HDHPs are defined by IRS rules — minimum deductibles and maximum out-of-pocket limits that are updated annually. Check current IRS thresholds at irs.gov.
- What are the main tax advantages of an HSA?
- HSA contributions have a triple tax advantage: contributions you make are tax-deductible (or pre-tax if made through payroll), the money grows tax-free, and withdrawals for qualified medical expenses are tax-free. Employer contributions to your HSA are also excluded from your taxable income. This makes the HSA one of the most tax-efficient financial accounts available in the US.
- What can HSA funds be used for?
- HSA funds can be used tax-free for a wide range of qualified medical expenses, as defined by IRS Publication 502: doctor visits, prescription medications, dental care, vision care, hearing aids, long-term care insurance premiums, COBRA premiums while unemployed, and Medicare premiums (but not Medigap). Cosmetic procedures and items not medically necessary are generally not qualified expenses.
- What happens to unused HSA funds at the end of the year?
- HSA funds roll over indefinitely from year to year with no forfeiture — this is a key difference from FSAs. If you invest your HSA balance in mutual funds or other allowed investments, the balance can grow over time. After age 65, you can withdraw HSA funds for any purpose (not just medical expenses) without penalty — withdrawals for non-medical purposes are taxed as ordinary income, similar to a traditional IRA.
- What is a Flexible Spending Account (FSA) and how is it different?
- An FSA is an employer-sponsored account that lets you set aside pre-tax money for medical expenses. Unlike an HSA, you do not need an HDHP to use an FSA, and your employer controls the account. Most FSAs operate under a use-it-or-lose-it rule — money not used by the end of the plan year (and sometimes a grace period) is forfeited. Some FSAs allow a limited carryover amount set by the IRS, or a grace period of a few months, but not indefinite rollover like an HSA.
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Last reviewed: September 2026