No, they are not the same, and the differences affect how much you can save and what happens to your money

A Health Savings Account (HSA) and a Flexible Spending Account (FSA) both let you set aside pre-tax dollars for medical expenses, but they work by different rules. An HSA is yours to keep and grows over time. An FSA is a use-it-or-lose-it account tied to your job—money you don't spend in a calendar year is forfeited. HSAs also let you invest the balance and carry it forward indefinitely, while FSAs do not. If you have a high-deductible health plan, you can open an HSA. If you have any other health plan through your employer, you can only open an FSA.

The core difference comes down to ownership and timing. With an HSA, the account belongs to you permanently. With an FSA, the account belongs to your employer and closes when you leave the job. This single fact shapes everything else: how much you can contribute, what you can do with unspent money, and whether the account follows you to your next job.

Key Takeaways

  • HSAs belong to you and roll over year to year; FSAs are employer-based and you lose unspent money at the end of each year.
  • You can only open an HSA if you are enrolled in a high-deductible health plan; FSAs are available with most other employer plans.
  • HSA contributions are higher ($4,150 individual, $8,300 family in 2024) than FSA limits ($3,200 in 2024), and HSAs let you invest the balance.
  • FSA money must be spent on medical expenses in the same calendar year or you forfeit it; HSA money stays yours indefinitely.
  • Both accounts use pre-tax dollars, so both reduce your taxable income and lower your payroll taxes.

How the money moves and who owns it

With an HSA, you own the account. Your employer may contribute to it, you contribute to it, and the money is yours whether you stay at that job or not. When you leave your job, the HSA comes with you. You can take it to a new employer, move it to a different bank, or keep it open on your own. The balance sits in your account year after year, and you can spend it whenever you need to on medical expenses.

With an FSA, your employer owns the account structure. You contribute through payroll deductions, your employer may add money, but the account is tied to your employment. When you leave the job, the FSA closes. Any money left in it is forfeited to your employer—you cannot take it with you. Within a single calendar year, you must spend the money on medical expenses or lose it.

Contribution limits and what you can invest

HSA contribution limits are higher. For 2024, you can contribute up to $4,150 if you have individual coverage or $8,300 if you have family coverage. These limits change each year. You can contribute as an individual, your employer can contribute, or both. The money you do not spend stays in the account and earns interest or investment returns if you choose to invest it.

FSA limits are lower. For 2024, the limit is $3,200 per year. Your employer sets the exact amount you can contribute, within the federal cap. FSA money typically sits in a cash account—you cannot invest it. Whatever you do not spend by December 31 is gone, with a narrow exception: some employers offer a grace period of up to 2.5 months into the next year, or a carryover of up to $640 to the next year. Your employer chooses which option, if any, to offer.

may be able to access: which plan you need to have

To open an HSA, you must be enrolled in a high-deductible health plan (HDHP). For 2024, that means a plan with a deductible of at least $1,600 for individual coverage or $3,200 for family coverage. You cannot have other health coverage at the same time, with limited exceptions for specific plans like dental or vision. If your employer offers an HDHP, you can open an HSA. If they do not, you cannot.

FSAs are available to anyone whose employer offers one, regardless of which health plan you choose. You can have an FSA with a low-deductible plan, a high-deductible plan, or any plan in between. The only requirement is that your employer's benefits package includes an FSA option. Not all employers offer one.

What happens to unspent money

HSA money that you do not spend stays in your account. You can let it accumulate year after year. Some people use HSAs as retirement savings vehicles—after age 65, you can withdraw HSA money for any reason without penalty, though non-medical withdrawals are taxed as income. Before age 65, you can only withdraw for medical expenses without penalty.

FSA money that you do not spend by the end of the calendar year is forfeited. This is the "use-it-or-lose-it" rule. Some employers offer a grace period (usually 2.5 months into the next year) or a limited carryover (usually $640), but most do not. If you contribute $2,000 to an FSA and spend only $1,500, you lose the remaining $500.

Tax treatment and payroll deductions

Both HSAs and FSAs use pre-tax dollars. Money you contribute comes out of your paycheck before federal income tax, Social Security tax, and Medicare tax are calculated. This reduces your taxable income and lowers the taxes you owe. If you contribute $3,000 to an FSA, your taxable income drops by $3,000. The same applies to HSA contributions.

Withdrawals from both accounts for may have access to medical expenses are tax-free. You do not pay income tax on the money you spend on copays, deductibles, prescriptions, or other may be able to access medical costs. If you withdraw HSA money for a non-medical expense before age 65, you pay income tax plus a 20% penalty. FSA withdrawals are only for medical expenses—there is no penalty, but non-medical withdrawals are taxed as income.

When to choose each account

Choose an HSA if your employer offers a high-deductible plan and you can afford to cover medical costs out of pocket until you meet the deductible. HSAs make sense if you are healthy, do not expect large medical expenses, and want to build savings over time. The higher contribution limits and ability to invest make HSAs powerful long-term savings tools. You keep the money whether you use it or not.

Choose an FSA if you have predictable medical expenses each year—regular prescriptions, ongoing therapy, dental work, or vision care—and you can estimate how much you will spend. FSAs make sense if you know you will use the money and want to reduce your taxable income without the commitment of an HSA. If your employer does not offer an HDHP, an FSA may be your only option. If you are unsure how much you will spend, FSAs carry the risk of forfeiting unused money.

Can you have both at the same time

You cannot have an HSA and an FSA at the same time if the FSA is a general-purpose account. However, you can have an HSA and a limited-purpose FSA, which covers only dental, vision, and hearing expenses. You can also have an HSA and a dependent care FSA, which covers childcare costs. These limited accounts do not disqualify you from HSA may be able to access because they do not cover general medical expenses.

If you have both an HSA and a general-purpose FSA, you lose HSA may be able to access. Your employer's benefits team can tell you whether your FSA is limited-purpose or general-purpose, and whether you can have both accounts in the same year.

Frequently Asked Questions

What happens to my FSA money if I leave my job mid-year?

Your FSA closes when you leave your job. You forfeit any unspent balance, even if you contributed to it. Some employers allow you to continue the FSA under COBRA for a limited time, but you must pay the full premium yourself. HSA money, by contrast, stays with you and moves to your next employer or a new bank.

Can I use HSA money for dental or vision care?

Yes. HSA money can be used for any may have access to medical expense, including dental work, vision care, hearing aids, and prescriptions. FSA money can also be used for these expenses. Both accounts cover a broad range of medical costs beyond just doctor visits.

What if I contribute too much to my FSA and do not spend it?

You lose the money. There is no refund, no rollover, and no way to recover it unless your employer offers a grace period or carryover option. This is why many people contribute conservatively to FSAs—it is better to leave money in your paycheck than to forfeit it.

Can I withdraw HSA money for anything other than medical expenses?

Before age 65, non-medical withdrawals are taxed as income plus a 20% penalty. After age 65, you can withdraw for any reason without penalty, but non-medical withdrawals are taxed as income. This makes HSAs useful as retirement savings if you do not need the money for medical expenses.

Which account should I choose if I am unsure how much I will spend on medical care?

An HSA is safer if you are uncertain. Money you do not spend stays in your account and grows. An FSA is riskier because unspent money is forfeited. If you cannot predict your medical expenses accurately, an HSA gives you flexibility and lets you keep the money regardless.