Can You Have Both an HSA and FSA at the Same Time?

You can have both an HSA and FSA, but only under specific circumstances, and the rules depend on which type of FSA you choose

The short answer is yes — but with a major catch. You can hold both accounts in the same year only if your FSA is a dependent care FSA (used for childcare or adult care expenses). If your FSA is a healthcare FSA (used for medical, dental, or vision costs), you cannot have an HSA in the same year. The IRS treats these as conflicting accounts because they both cover similar medical expenses, and the tax rules prevent you from using both simultaneously.

The reason for this restriction comes down to how HSAs work. An HSA requires you to be enrolled in a high-deductible health plan (HDHP) — a specific type of health insurance. Healthcare FSAs are typically offered alongside traditional health plans with lower deductibles. The IRS does not allow you to have both because it would let you shelter too much money from taxes while covering the same medical bills twice.

Key Takeaways

You can have an HSA and a dependent care FSA in the same year, since they cover different types of expenses.
You cannot have an HSA and a healthcare FSA at the same time, because both cover medical costs and the IRS prohibits this combination.
If you have a healthcare FSA and want an HSA, you must wait until the next calendar year after your FSA coverage ends.
Dependent care FSAs cover childcare, preschool, and adult day care — expenses that HSAs do not cover.
Your employer's benefits enrollment period determines when you can switch from one account type to another.

The HSA and Healthcare FSA conflict

A healthcare FSA is a tax-advantaged account that lets you set aside pre-tax money for medical, dental, and vision expenses. It is offered by many employers as part of their benefits package. The problem is that an HSA also covers these same categories of expenses. If you could use both in the same year, you could pay for one medical bill with HSA money, then pay for another with FSA money, and avoid taxes on both — which the IRS does not permit.

The IRS rule is straightforward: if you are enrolled in an HSA, you cannot be covered by a healthcare FSA during that same calendar year. "Covered by" means your employer has enrolled you in the plan, even if you do not actually use it. If you have a healthcare FSA and want to switch to an HSA, you must first drop the FSA coverage and wait until the next year to open the HSA.

There is one narrow exception: if your healthcare FSA is a limited-purpose FSA that covers only dental and vision expenses (not general medical costs), you may be able to have both. However, this is rare, and you should confirm with your employer's benefits administrator before assuming it applies to you.

Why dependent care FSAs are different

A dependent care FSA covers expenses for childcare, preschool, after-school care, and adult day care for aging parents or disabled family members. Because these expenses are completely separate from medical costs, the IRS allows you to have both a dependent care FSA and an HSA in the same year. They do not overlap, so there is no risk of double-sheltering the same expense.

If you use a dependent care FSA, you can still open and fund an HSA without any conflict. The two accounts serve different purposes and use different types of expenses, so the tax rules do not prevent you from holding both. This is one of the few situations where you get the benefit of multiple tax-advantaged accounts at once.

How to switch from an FSA to an HSA

If you currently have a healthcare FSA and want to move to an HSA, you cannot do both in the same calendar year. You will need to drop your healthcare FSA coverage during your employer's open enrollment period (usually in the fall for coverage starting January 1). Once your FSA coverage ends on December 31, you become may be able to access to open an HSA on January 1 of the following year.

The timing matters because the IRS looks at your coverage status on the first day of each month. If you are covered by a healthcare FSA on January 1, you cannot have an HSA for that entire year, even if you drop the FSA in February. Plan your switch during the annual enrollment window so your coverage changes align with the calendar year.

Before you make the switch, spend down your FSA balance. FSAs operate on a "use it or lose it" rule — money you do not spend by the end of the year is forfeited (though some plans offer a grace period or carryover of up to $610, depending on your employer). Once you move to an HSA, you cannot recover that unused FSA money, so plan your medical expenses accordingly in your final FSA year.

What happens if you already have both accounts

If you somehow ended up with both a healthcare FSA and an HSA in the same year — perhaps because you changed jobs or your employer made a benefits change — you are in violation of IRS rules. You should contact your benefits administrator when ready to drop one of the accounts. The IRS does not typically penalize individuals for honest mistakes, but continuing to use both accounts knowingly can result in tax penalties and the requirement to repay taxes you avoided.

If you received a notice from the IRS or your employer about this situation, do not ignore it. Reach out to your benefits administrator or a tax professional to correct the problem. The sooner you address it, the simpler the fix will be.

Comparing your options: HSA versus healthcare FSA

Since you cannot have both, it helps to understand which one might work better for your situation. An HSA offers more flexibility: money rolls over year to year, you can invest it, and you can withdraw it for non-medical expenses after age 65 (though you will pay income tax on those withdrawals). An HSA requires enrollment in an HDHP, which has a higher deductible but often lower premiums.

A healthcare FSA is simpler but more restrictive. You must spend the money within the year (or lose it), and you cannot invest it. However, FSAs are available with any health plan, not just high-deductible plans, so they work for people who prefer lower deductibles. If your employer offers both options, compare the deductibles, premiums, and how much you typically spend on medical care to decide which fits your needs.

Dependent care FSA with HSA: the best of both worlds

If your employer offers a dependent care FSA, this is one situation where you genuinely can have the best of both worlds. You can fund an HSA for your own medical expenses and a dependent care FSA for childcare or elder care costs, all in the same year. This combination lets you shelter more income from taxes and cover a wider range of family expenses.

The dependent care FSA has the same "use it or lose it" rule as a healthcare FSA, so plan carefully. But since it covers expenses that an HSA does not, there is no conflict. If you have both childcare costs and medical expenses, this combination can be very tax-efficient.

Frequently Asked Questions

Can I have an HSA and healthcare FSA if I switch jobs mid-year?

No. The IRS rule applies to the entire calendar year. If you are covered by a healthcare FSA on January 1, you cannot have an HSA for that year, even if you leave your job in June. When you start a new job, you can enroll in an HSA only if the new employer does not offer a healthcare FSA, or if you decline the FSA coverage.

What if my employer offers a limited-purpose FSA?

A limited-purpose FSA that covers only dental and vision expenses (not medical) may be allowed alongside an HSA. However, rules vary, and some limited-purpose FSAs still conflict with HSAs. Ask your benefits administrator to confirm whether your specific plan allows both before enrolling in an HSA.

Can I use my healthcare FSA money to pay for HSA-may be able to access expenses?

Yes, as long as you have the healthcare FSA. Both accounts cover the same types of medical expenses — copays, deductibles, prescriptions, dental work, and vision care. You can use whichever account you have available. The restriction is on having both accounts open at the same time, not on what expenses they cover.

What happens to my FSA money if I switch to an HSA?

Any money left in your healthcare FSA at the end of the year is forfeited — you cannot transfer it to an HSA. Some employers offer a grace period (usually 2.5 months into the next year) or allow you to carry over up to $610 to the next year. Check your plan documents to see if either option applies, and spend down your FSA balance before the important date.

Can I have two FSAs at the same time?

No. You can have only one healthcare FSA and one dependent care FSA per year. If you are married and both spouses work, each spouse can have their own accounts, but you cannot have two of the same type yourself.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.