You can have both an HSA and FSA, but only under specific conditions
Yes, you can own both accounts in the same year — but the IRS has strict rules about which types of FSA you can pair with an HSA. The key restriction is the FSA coverage type. If your FSA covers medical expenses (a general-purpose FSA), you cannot also have an HSA. If your FSA covers only dependent care or transit costs, you can have an HSA alongside it.
The reason for this rule is that HSAs and general-purpose FSAs both let you set aside pre-tax money for medical bills. Allowing both would let you double-dip on tax savings for the same expense. The IRS prevents that by making HSA ownership incompatible with a general-purpose medical FSA.
If you have a medical FSA through your employer and want to open an HSA, you would need to drop the medical FSA first — usually during open enrollment or when you change jobs. A dependent care FSA or transit FSA does not create this conflict, so those can run alongside an HSA without any problem.
Key Takeaways
- A general-purpose medical FSA and an HSA cannot coexist in the same year; you must choose one or the other.
- A dependent care FSA or transit/parking FSA can be paired with an HSA because they cover different expense categories.
- If you want to switch from a medical FSA to an HSA, you typically must wait until open enrollment or a may have access to life event to drop the FSA.
- Once you drop a medical FSA, you become HSA-may be able to access when ready, though your HSA contribution limit for that year may be reduced if you enroll partway through.
Why the IRS does not allow both medical accounts
Both an HSA and a medical FSA let you contribute money before taxes are taken out, then use that money to pay for medical expenses. If you could have both at the same time, you could set aside money in each account for the same doctor visit or prescription — and avoid taxes on the same dollar twice. The IRS blocks this by requiring that you choose one account type or the other.
This rule applies only to medical FSAs. Dependent care FSAs and transit FSAs cover completely different things (childcare and commuting), so there is no overlap in what you can pay for. That is why the IRS allows you to have an HSA and a dependent care FSA in the same year without any issue.
What happens if you have a medical FSA and want an HSA
If your employer offers both accounts and you currently have a medical FSA, you cannot straightforward open an HSA on top of it. You must first drop the medical FSA. Most employers let you make this change during open enrollment (usually once a year), or if you have a may have access to life event like losing other health coverage, getting married, or having a child.
Once you drop the medical FSA, you become HSA-may be able to access right away. However, if you drop the FSA partway through the year and then enroll in an HSA, your contribution limit for that year will be reduced. For example, if you drop your FSA in July and enroll in an HSA, you can only contribute half the annual HSA limit for that year. Your employer's benefits team can tell you the exact reduced amount based on when you make the switch.
Dependent care FSA and HSA together
A dependent care FSA and an HSA work together without any restriction. A dependent care FSA pays for childcare, preschool, after-school programs, and adult day care for a dependent you claim on your taxes. An HSA pays for medical expenses. Since these are separate categories, the IRS sees no conflict.
You can contribute to both accounts in the same year and use each one for its intended purpose. This combination is common among families who have both childcare costs and high medical expenses or a high-deductible health plan.
Transit and parking FSA with an HSA
A transit and parking FSA (sometimes called a commuter FSA) covers pre-tax contributions toward public transportation, vanpools, and parking. Like the dependent care FSA, this account covers a category completely separate from medical expenses, so it does not conflict with HSA ownership.
You can have an HSA and a transit FSA running at the same time. The two accounts serve different purposes and do not create any tax overlap, so the IRS places no restriction on holding both.
How to check which FSA you have
If you are not sure whether your FSA is a medical FSA, dependent care FSA, or transit FSA, check your benefits enrollment materials or contact your employer's benefits team. Your FSA account statement or the plan document will clearly state which type of FSA you have. The account name often includes the category — for example, "Health Care FSA" or "Dependent Care FSA."
If you have a "Health Care FSA" or "Medical FSA," that is the type that conflicts with an HSA. If your FSA is labeled "Dependent Care" or "Transit/Parking," you can have an HSA at the same time. When in doubt, ask your benefits administrator before making any changes to your accounts.
What to do if you want to switch
If you have a medical FSA and want to move to an HSA instead, start by checking your employer's open enrollment dates. Most companies hold open enrollment once a year, usually in the fall. During that window, you can drop your medical FSA and enroll in an HSA if your plan offers one.
If you have a may have access to life event — such as losing your current health coverage, getting married, having a baby, or moving to a new state — you may be able to make changes outside of open enrollment. Contact your benefits team to find out whether your situation qualifies and what forms you need to submit.
Before you switch, consider whether you have money left in your medical FSA. Most FSAs operate on a "use it or lose it" basis, meaning unused money at the end of the year goes back to your employer. Some plans offer a grace period (usually 2.5 months into the next year) to spend remaining funds, or a carryover of up to $610 (this amount changes yearly). Check your plan documents to see what happens to your balance if you drop the account mid-year.
Frequently Asked Questions
Can I have an HSA if I am on my spouse's health plan?
Yes, as long as your spouse's plan is HSA-compatible (usually a high-deductible health plan) and neither of you has a medical FSA. If your spouse has a medical FSA, you cannot have an HSA, because the IRS treats married couples filing jointly as a single tax unit for HSA purposes. You would both need to drop the medical FSA first.
What if my employer only offers a medical FSA, not an HSA?
If your employer does not offer an HSA, you cannot have both accounts through that employer. You could open an HSA on your own if you have a high-deductible health plan, but you would still be blocked from doing so while enrolled in the medical FSA. You would need to drop the FSA first.
Can I roll over my medical FSA money into an HSA?
No, you cannot transfer money directly from a medical FSA to an HSA. However, some plans offer a grace period or carryover that lets you spend remaining FSA money after you drop the account. Once that period ends, any leftover balance is forfeited. You start fresh with your HSA contribution for the next year.
If I drop my medical FSA mid-year, when can I use my HSA?
You become HSA-may be able to access as soon as you drop the medical FSA, and you can open an HSA when ready. However, your contribution limit for that year will be reduced based on how many months remain in the year. Your employer or HSA provider can calculate the exact amount you are allowed to contribute.
Does having a medical FSA prevent me from opening an HSA with a different employer?
Yes. The IRS rule applies to your HSA may be able to access for the entire calendar year, regardless of which employer offers the account. If you have a medical FSA through one employer, you cannot open an HSA through another employer in the same year. You must drop the medical FSA first.