HSA vs. FSA: What's the Difference and Which Is Better?

An HSA and an FSA both let you pay medical costs with pre-tax money, but they follow very different rules. An HSA belongs to you and stays with you for life. An FSA belongs to your employer's benefit plan and usually resets each year. This guide compares HSA vs. FSA rules, adds the HRA, and helps you choose the right account.

What is the difference between an HSA and an FSA?

The main difference between an HSA and an FSA is ownership and rollover. You own an HSA, and the balance rolls over forever. Your employer's plan runs an FSA, and unused money is generally lost at year end. The account you can use also depends on your health plan and your job. An HSA requires an HSA-eligible plan. An FSA requires an employer that offers one. Self-employed people can't use an FSA for their own costs, and many employees have only one choice. Start with the accounts actually open to you, then compare the rules below.

What is an HSA?

An HSA is a health savings account, the portable account for pre-tax medical savings. An HSA works only with an HSA-eligible health plan. Bronze and Catastrophic plans count as HSA-compatible starting in 2026. Key HSA rules for 2027:

• Eligibility: enrollment in an HSA-eligible plan and no other disqualifying coverage
• Contribution limit: $4,500 self-only and $9,000 family
• Catch-up: an extra $1,000 at age 55 and older
• Rollover: unused money stays in the account every year
• Ownership: you keep the account when you change jobs or plans
• Investing: many HSA providers let you invest the balance

What is an FSA?

An FSA is a flexible spending account, the employer-run account funded with pre-tax payroll deductions. Only employers can offer an FSA. Key FSA rules:

• Contribution limit: $3,400 per employee for 2026; check the IRS figure for 2027 plan years
• Use-it-or-lose-it: unused money is generally forfeited at year end
• Carryover: employers may allow up to $680 to carry from 2026 into 2027, or a short grace period instead
• Full amount upfront: the whole annual election is available on day one
• Job change: the account usually ends when you leave the job

HSA vs. FSA vs. HRA: how do they compare?

HSA, FSA, and HRA accounts differ on who funds them, who owns them, and what happens to unused money. The comparison chart shows the main differences.

Small employers can offer specific HRA types. Read ICHRA vs. QSEHRA.

What are the eligible expenses for an HSA and an FSA?

HSA and FSA eligible expenses both follow the IRS definition of qualified medical expenses. Common examples include deductibles, copays, prescriptions, dental care, and vision care. Key differences and limits:

• Insurance premiums: generally not eligible for either account, with limited HSA exceptions
• Non-medical HSA withdrawals: taxable, with a penalty before age 65
• Non-medical FSA spending: not allowed
• Proof: keep receipts for every account

IRS Publication 502 and your plan documents list the details.

Can you have an HSA and an FSA at the same time?

Having an HSA and an FSA at the same time works only with a limited-purpose FSA. A general-purpose FSA counts as other coverage and blocks new HSA contributions. A limited-purpose FSA covers only dental and vision costs, so it keeps you HSA-eligible. A spouse's general-purpose FSA can also block your HSA contributions. Ask your employer which type it offers before you enroll in both.

Which is better, an HSA or an FSA?

An HSA is usually better for long-term savings, and an FSA is usually better for predictable costs this year. Your health plan and job decide the choice. Use these decision rules:

• HSA-eligible plan: choose the HSA for long-term, tax-free savings
• Employer plan that isn't HSA-eligible: use the FSA for predictable yearly costs
• Self-employed: only the HSA is available
• Large planned expense this year: an FSA gives the full amount on day one
• Both offered: pair the HSA with a limited-purpose FSA for dental and vision

HSA contributions also lower the income used for marketplace tax credits. See whether Bronze plans are HSA-eligible.

Frequently asked questions

Can you use an HSA or FSA for a spouse?

You can generally use an HSA or FSA for a spouse's and dependents' qualified medical expenses. The account rules follow the IRS definition, not whether the family member shares your plan. An HSA can pay these costs even if the spouse has separate coverage. Check your FSA plan documents for its rules.

Can you change FSA contributions during the year?

FSA contributions generally stay fixed for the plan year. A qualifying change, such as a marriage or a new child, can let you adjust. HSA contributions are more flexible, because you can usually change them during the year. Ask your benefits office for your plan's rules.

Do self-employed people get an HSA or an FSA?

Self-employed people can open an HSA if they have an HSA-eligible plan. Self-employed people generally cannot use an FSA, because an employer benefit plan runs that account. HSA contributions have their own tax deduction, separate from the self-employed health insurance deduction.

Get help choosing an HSA-eligible plan

Choosing an HSA-eligible plan is easier with a licensed broker who compares every option in your ZIP code. I'll check your doctors and prescriptions and compare ACA and private options side by side. My help is free, and your price is the same whether you enroll on your own or with me. Confirm tax questions with a tax professional.