2026-04-04 · health, shopping, guide

Updated: 2026-11-05

By InsuraFAQ Editorial Team · Reviewed for accuracy

HSA vs FSA: How Health Savings Accounts Work

Key Takeaways

• HSA contributions require a qualifying high-deductible health plan (HDHP) and other eligibility conditions; unused account funds roll over year after year.
• A flexible spending account (FSA) is offered through your employer and generally follows a use-it-or-lose-it rule, with limited rollover or grace period options.
• Both accounts let you pay for qualified medical expenses with pre-tax dollars, reducing your taxable income.
• HSAs offer a triple tax advantage: tax-deductible contributions, tax-free growth, and tax-free withdrawals for qualified expenses.
• Your choice depends on your health plan type, expected medical costs, and whether you want long-term savings flexibility.

Who This Is For

This guide is for employees choosing benefits during open enrollment, self-employed individuals considering high-deductible health plans, and anyone trying to reduce healthcare costs through tax-advantaged accounts. If you are comparing health insurance plans and want to understand how HSAs and FSAs fit into your coverage decisions, this article walks through the key differences.

Overview

Both HSAs and FSAs let you set aside pre-tax money for healthcare expenses, but they work differently and have different rules. Understanding these differences can help you make a more informed choice during open enrollment and potentially save hundreds or thousands of dollars per year on medical costs.

An HSA is a personal savings account tied to a high-deductible health plan. An FSA is an employer-sponsored benefit that does not require a specific plan type. The accounts differ in rollover rules, portability, contribution limits, and long-term savings potential.

What Is an HSA?

A health savings account (HSA) is a tax-advantaged account. To contribute, you must meet IRS eligibility rules, including qualifying high-deductible health plan (HDHP) coverage. HSAs offer what is often called a “triple tax advantage”:

• Tax-deductible contributions. The money you put in reduces your taxable income for the year.
• Tax-free growth. Any interest or investment gains in the account grow without being taxed.
• Tax-free withdrawals. Money you take out for qualified medical expenses is not taxed.

HSAs are owned by the individual, not the employer. If you change jobs, your HSA goes with you. Unused funds roll over indefinitely. Ask your HSA provider whether it offers investments, which options are available, and whether any minimum balance or fees apply.

HDHP requirement

To contribute to an HSA, you generally must have qualifying HDHP coverage on the first day of the month, have no disqualifying other health coverage, not be enrolled in Medicare, and not be claimable as someone else’s tax dependent. A general-purpose health FSA can be disqualifying; certain limited-purpose coverage is permitted. The IRS explains HSA contribution eligibility and exceptions. Eligibility to contribute is distinct from keeping or spending an existing HSA.

For 2026, the IRS defines an HDHP as a plan with a minimum deductible of $1,700 for self-only coverage or $3,400 for family coverage, with annual out-of-pocket maximums capped at $8,500 (self-only) and $17,000 (family). For 2027, the minimum deductible is $1,750 self-only or $3,500 family, and the out-of-pocket maximum is $8,700 self-only or $17,400 family, excluding premiums. See IRS Revenue Procedure 2026-24. Check your plan and current rules.

What Is an FSA?

A flexible spending account (FSA) is an employer-sponsored benefit that lets you set aside pre-tax dollars for eligible healthcare expenses. Unlike an HSA, an FSA does not require a high-deductible health plan. Most employer-sponsored health insurance plans offer FSA options.

Key features of an FSA:

• Use-it-or-lose-it rule. Funds generally must be used within the plan year. However, employers may offer one of two options: a grace period of up to 2.5 extra months, or a rollover of up to $680 (2026 limit, adjusted annually) into the next plan year. Employers choose one option or neither, but not both.
• Employer-owned. The account is tied to your employer. If you leave your job, you typically forfeit unused FSA funds unless you elect COBRA continuation.
• Full balance available immediately. Unlike an HSA where funds accumulate as you contribute, your full annual FSA election is available on day one of the plan year.

HSA vs FSA Comparison Table

Note: The 2026 HSA and HDHP figures come from IRS Revenue Procedure 2025-19; the 2026 health FSA limit and carryover rule come from IRS Revenue Procedure 2025-32. Employer plans can be more restrictive where the IRS permits an option.

Eligible Expenses

Both HSAs and FSAs cover a wide range of qualified medical expenses as defined by the IRS in Publication 502. Common eligible expenses include:

• Doctor visits and specialist copays
• Prescription medications
• Dental care (cleanings, fillings, crowns, orthodontia)
• Vision care (eye exams, glasses, contact lenses)
• Mental health services and therapy
• Lab work and diagnostic tests
• Medical equipment (crutches, blood pressure monitors)
• Certain over-the-counter medications and health products

Some expenses that are not eligible include cosmetic procedures, gym memberships, and general wellness supplements (unless prescribed). When in doubt, check IRS Publication 502 or ask your plan administrator.

Contribution Limits

Contribution limits are set by the IRS and adjust annually for inflation.

HSA contribution limits (2026 and 2027)

• 2026 self-only coverage: $4,400
• 2026 family coverage: $8,750
• 2027 self-only coverage: $4,500
• 2027 family coverage: $9,000
• Catch-up contribution (age 55 and older): Additional $1,000

These limits include both your contributions and any employer contributions. Self-employed individuals can contribute if they meet all HSA eligibility conditions, not just the HDHP requirement. The 2026 figures are from Rev. Proc. 2025-19; the 2027 figures are from Rev. Proc. 2026-24. Limits adjust annually and may be prorated based on eligibility.

FSA contribution limits (2026)

• Employee contribution: $3,400 per year
• Carryover (if employer permits): Up to $680 of unused funds into the next plan year
• Employer contributions: Not counted toward the employee limit (varies by employer)

If both you and your spouse have access to an FSA through separate employers, each of you can contribute up to the individual limit.

Always verify current limits at IRS.gov, as these figures adjust annually.

Tax Benefits

Both accounts reduce your tax burden, but HSAs provide a broader tax advantage.

HSA tax benefits

• Contributions are tax-deductible (or pre-tax if made through payroll). This reduces your federal income tax and, in most states, your state income tax.
• Investment growth is tax-free. Over time, this can significantly increase the value of your account.
• Withdrawals for qualified medical expenses are tax-free at any age.
• After age 65, you can withdraw funds for any purpose without penalty (though non-medical withdrawals are taxed as ordinary income, similar to a traditional IRA).

FSA tax benefits

• Contributions are pre-tax through payroll deduction, reducing your taxable income and your FICA (Social Security and Medicare) taxes.
• Withdrawals for qualified expenses are tax-free.
• FSAs do not offer investment growth or the post-65 flexibility that HSAs provide.

For someone in the 22% federal tax bracket contributing $3,000 to either account, the tax savings on contributions alone would be approximately $660 in federal income tax, plus additional savings on state taxes and FICA (for FSAs).

HSA and FSA contributions are just two of the insurance-related deductions worth reviewing at tax time — our guide to insurance-related tax breaks you might miss covers several others.

How to Choose Between HSA and FSA

The right choice depends on your health plan, your expected medical expenses, and your savings goals.

Choose an HSA if:

• You meet all IRS HSA contribution requirements, including qualifying HDHP coverage
• You want unused funds to roll over year after year
• You want potential long-term growth and have checked your provider’s investment options
• You are comfortable with a higher deductible in exchange for lower premiums
• You want an account that stays with you if you change jobs
• You are looking for a supplemental retirement savings vehicle

Choose an FSA if:

• Your employer does not offer an HDHP, or you prefer a lower-deductible plan
• You have predictable annual medical expenses and can estimate your spending accurately
• You want access to your full annual election amount on day one
• You do not need rollover or portability features
• You want to reduce your health insurance costs through pre-tax savings without changing your plan type

Can you have both?

In most cases, you cannot contribute to both a general-purpose FSA and an HSA in the same year. However, you can pair an HSA with a limited-purpose FSA (LP-FSA), which covers only dental and vision expenses. Check with your employer’s benefits administrator to see if this option is available.

Frequently asked questions

Can I have both an HSA and FSA?

Generally, no. If you have a general-purpose FSA, you are not eligible to contribute to an HSA. However, you may be able to pair an HSA with a limited-purpose FSA that covers only dental and vision expenses. A dependent care FSA (DCFSA), which covers childcare costs, does not affect HSA eligibility.

What happens to my FSA if I leave my job?

Unused FSA funds are typically forfeited when you leave your employer. You can submit claims for expenses incurred before your termination date, but you generally cannot use the account after your coverage ends unless you elect COBRA continuation for the FSA. This is one of the key differences from an HSA, which you own and keep regardless of employment changes.

Can I use HSA money for non-medical expenses?

Yes, but with conditions. Before age 65, withdrawals for nonqualified expenses generally are subject to income tax plus a 20% additional tax; exceptions to the additional tax include death or disability. After age 65, nonqualified withdrawals are generally taxable but not subject to that additional tax.

Insurance premiums generally are not qualified HSA expenses. IRS Publication 969 lists limited exceptions, including COBRA continuation coverage, coverage while receiving unemployment compensation, qualifying long-term care premiums subject to limits, and Medicare or other eligible health coverage when the account holder is 65 or older. Medigap premiums are excluded. Check the specific rules before using HSA funds for premiums.

Do HSA funds expire?

No. Unlike FSA funds, HSA balances roll over indefinitely. There is no deadline to spend the money, and the account remains yours even if you change jobs, switch health plans, or retire. This makes HSAs useful for both short-term medical expenses and long-term healthcare savings.

Practical Next Steps

1. Check contribution eligibility. Confirm that your plan is a qualifying HDHP and review other coverage, Medicare enrollment, and dependent status under the IRS rules. Ask your plan or benefits administrator about your coverage; an HDHP alone does not establish eligibility.
2. Estimate your annual medical spending. Review last year’s medical expenses to estimate what you might spend this year. If your costs are predictable and moderate, an FSA may work well. If you want flexibility, an HSA may be a better fit.
3. Review your employer’s options. During open enrollment, check whether your employer offers HSA contributions, FSA options, or both. Employer contributions to your HSA are essentially free money.
4. Consider your savings goals. If you want to build a long-term healthcare fund or supplement your retirement savings, an HSA’s rollover may help; check whether your provider offers investments and what conditions apply.
5. Compare total plan costs. When deciding between an HDHP with HSA and a traditional plan with FSA, compare the full picture: premiums, deductibles, out-of-pocket maximums, and the value of employer contributions to either account. See our guide on health insurance costs for help with this comparison.

Sources

• IRS Publication 969: Health Savings Accounts and Other Tax-Favored Health Plans
• IRS Publication 502: Medical and Dental Expenses
• Healthcare.gov: Using a Flexible Spending Account
• IRS Rev. Proc. 2026-24 — 2027 HSA and HDHP limits
• IRS Rev. Proc. 2025-19 — 2026 HSA and HDHP limits
• IRS Rev. Proc. 2025-32 — 2026 health FSA limits and carryover