HSA vs. FSA: Key Differences

Both a health savings account (HSA) and a flexible spending account (FSA) allow you to pay for medical care with pre-tax dollars, which reduces the cost. With healthcare accounting for 8.1% of Americans' average monthly expenses, these tax shelters are important financial tools.

But while an HSA and FSA sound similar, there are important differences between them.

• HSAs are tax-advantaged accounts either you or an employer can open and contribute to if you have a qualifying high-deductible health plan (HDHP). HSAs allow you to make pre-tax contributions and take tax-free withdrawals to pay for covered care. The money in an HSA can be invested and grow over time and can also be withdrawn after age 65 and will be taxed at your ordinary tax rate with no penalties.
• You can also make pre-tax contributions and take tax-free withdrawals from FSAs, but they can only be opened by employers. These accounts serve as a short-term savings account rather than an investment account. You must decide at the start of the year how much to contribute, the money cannot be invested, and it is lost if not used for medical care in the year it is contributed or shortly thereafter. 

HSAs provide much more flexibility on how you spend your money, while FSAs allow you to pay for both medical care and dependent care with pre-tax dollars. This guide will help you understand how the rules differ when it comes to eligibility, using account funds, and more.

Key differences between FSAs and HSAs

The biggest differences between FSAs and HSAs are the following:

• Eligibility rules: Only employers offer FSAs, while HSAs can be offered by employers but can also be opened independently. However, FSAs are available to anyone whose company offers one, while you can contribute to an HSA only if you have a qualifying HDHP. 
• Tax rules: While an FSA and HSA both allow you to make contributions with pre-tax dollars, an FSA is not the same as an HSA for tax purposes. The HSA contribution limits are different from the FSA limits. HSAs allow catch-up contributions for those 55 and older, but FSAs do not. 
• Contribution rules: You must choose how much to contribute to your FSA at the start of the year, while you have the flexibility to make HSA contributions until Tax Day for the year in which the contribution is made. 
• Ability to invest: When you make contributions to an HSA, the money is put into an account with a financial institution, such as a bank or brokerage firm, and you can invest your HSA money so the funds can grow. FSA funds cannot be invested. 
• Permissible use of the funds: HSAs are intended to cover healthcare only, while there are different types of FSAs, including healthcare FSAs and dependent-care FSAs. Money put into a dependent-care FSA can be used to pay for child or adult day care with pre-tax funds. 

• Carryover rules: Money in an FSA must be spent in the year it is contributed or it is forfeited. In some cases, you can carry over $640 in 2024 ($660 in 2025) from your current year's FSA into the next year (without affecting contribution limits) or use your funds during a grace period after the end of the year. However, not all FSA plans allow these options. HSA funds, on the other hand, don't have to be withdrawn at any specific time and can remain invested and grow for as long as you'd like.
• Withdrawal rules: FSA money can only be used to cover eligible medical expenses. HSA funds can be withdrawn for other purposes, but withdrawals before age 65 are subject to a 20% penalty plus income taxes if the money isn't used to cover medical care. After age 65, you can take money out of an HSA for anything you'd like and will simply pay taxes at your ordinary income tax rate.
• Account ownership rules: Your HSA belongs to you. If you leave your job, you can take it with you. This is not the case with an FSA, which you forfeit upon leaving your job unless you are eligible for and elect COBRA continuation coverage of your FSA. 

HSA vs. FSA eligible expenses

HSAs and FSAs have similar rules regarding which medical expenses you can pay for with your contributed funds. For example, you can pay for prescription medications, eye care, hearing aids, most types of dental care, chiropractic care, and most other medical services. 

However, dependent-care FSAs enable you to pay for many things HSAs do not. For example, you can pay for child care costs, including day care, overnight summer camp, housekeeping expenses related to dependent care, and similar expenses incurred while caring for qualifying dependents. 

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HSA vs. FSA comparison chart

The chart below provides insight into the key differences between HSAs and FSAs so you can learn the rules for each account. 

For many people, an HSA offers more flexibility and is a better choice. However, if you do not have a qualifying HDHP and therefore aren't eligible for an HSA, and your employer does offer an FSA, it may be your best option for paying for healthcare expenses with pre-tax dollars. 

Pros and cons of an HSA vs. FSA

Here are the key pros and cons of each type of account to consider.

Be sure to consider the advantages and disadvantages of each account type to make the best choices for covering your healthcare needs.