Every year, over $3.5 billion in unused flexible spending account (FSA) funds go back to employers and insurance providers, according to 2024 data from the Society for Human Resource Management. That’s hundreds of dollars per employee that could have covered critical out-of-pocket healthcare costs—if only they knew exactly what is flex spending eligible. Whether you have a health FSA, dependent care FSA, or limited-purpose FSA, understanding eligible expenses is the first step to maximizing the tax-advantaged benefits these accounts offer. In this guide, we’ll break down every category of eligible flex spending, common misconceptions, and how to avoid leaving free money on the table.
The Core Definition: What is Flex Spending Eligible Exactly?
Flex spending eligible expenses are IRS-approved out-of-pocket healthcare, dependent care, or (in rare cases) health insurance premium costs that qualify for tax-free reimbursement through a flexible spending account. FSAs are employer-sponsored accounts where you set aside pre-tax dollars from your paycheck to cover qualified costs, so the IRS enforces strict rules to ensure only eligible expenses are reimbursed. There are three main types of FSAs, each with its own set of approved costs, but all follow the IRS’s general guidelines for what counts as a valid expense. Most employees only use one type of FSA, but some employers offer combined options for specific needs.
Health FSA Eligible Expenses: The Most Common Flex Spending Category
Health FSAs are the most widely offered FSA type, covering most out-of-pocket medical and dental costs that your primary insurance plan doesn’t cover. Millions of employees use their health FSA to offset the high cost of annual deductibles, urgent care copays, and prescription medications, all of which are considered flex spending eligible. Even routine costs like annual physical exam copays and dentist cleanings (if not fully covered by insurance) qualify for reimbursement.
Many people don’t realize that a long list of lesser-known expenses also count as flex spending eligible for health FSAs. Some of these hidden eligible costs include:
- Prescription-strength sunscreen with a minimum SPF 15
- Breast pumps and all lactation supplies for new parents
- Weight loss programs prescribed by a physician to treat a specific medical condition like obesity
- Smoking cessation programs and prescription nicotine patches
To help you quickly tell the difference between eligible and ineligible health FSA costs, here’s a small reference table:
| Eligible Health FSA Expense | Ineligible Health FSA Expense |
|---|---|
| Prescription eyeglasses and contact lenses | Elective cosmetic surgery |
| Doctor’s office copays for specialist visits | Gym memberships (unless medically prescribed) |
| Insulin (even without a prescription) | Over-the-counter meds without a prescription (pre-2020 rules) |
Most health FSAs come with either a 2.5-month grace period after the end of the plan year to use leftover funds, or a $500 annual carryover limit, depending on your employer’s specific plan rules. It’s important to check your FSA handbook or portal to understand these rules, since forfeiting unused funds is a common mistake that costs employees thousands each year.
Dependent Care FSA Eligible Expenses: Covering Care for Loved Ones
Dependent care FSAs are a separate type of FSA designed to cover care costs for qualifying dependents so you can work, look for work, or attend school full-time. Qualifying dependents include children under the age of 13, disabled spouses, and disabled dependents of any age who rely on you for daily care. Unlike health FSAs, these funds cannot be used for medical expenses.
The IRS has a clear list of eligible dependent care costs, and some of the most common include:
- Daycare centers and in-home babysitters
- Before- and after-school programs for school-aged children
- Summer day camp (not overnight camp, which does not qualify)
- Adult day care for a disabled spouse or aging parent
There are a few key rules to follow when using a dependent care FSA, including keeping records of all payments made to care providers. You’ll need to provide your provider’s name, address, and tax identification number when submitting a reimbursement claim, so having this information on hand is critical. You also cannot use dependent care FSA funds to pay for care provided by a dependent who is your child under the age of 21, even if they qualify as a dependent for tax purposes.
For 2024, the IRS sets the annual contribution limit for dependent care FSAs at $5,000 per household, or $2,500 per person if you are married and filing separately. Unlike health FSAs, most dependent care FSAs do not offer a grace period or carryover limit, so you’ll forfeit any unused funds at the end of the plan year unless your employer specifically offers an exception.
Limited-Purpose FSA Eligible Expenses: For Dental and Vision After High Deductible Plans
Limited-purpose FSAs are a specialized FSA type that is paired exclusively with high-deductible health plans (HDHPs). These accounts are designed to cover dental and vision expenses before you meet your HDHP’s annual deductible, which can save you hundreds of dollars on routine care. Unlike standard health FSAs, you cannot use limited-purpose FSA funds for general medical expenses.
The list of eligible expenses for limited-purpose FSAs is narrow but focused on critical oral and eye care costs. Some of the most common eligible expenses include:
- Dental cleanings, fillings, and extractions
- Vision exams, eyeglasses, and contact lenses
- Prescription dental medications and over-the-counter vision care supplies like contact lens solution
- Orthodontic treatments like braces and clear aligners
A common misconception about limited-purpose FSAs is that they can be used alongside health savings accounts (HSAs), but this is not allowed. The IRS prohibits contributing to both an HSA and a limited-purpose FSA for the same plan year, so you’ll need to choose one or the other if you have an HDHP. Additionally, you cannot use limited-purpose FSA funds for LASIK surgery if it is considered an elective procedure, but it may qualify if your doctor deems it medically necessary.
According to 2023 data from the Kaiser Family Foundation, only 18% of employers offered limited-purpose FSAs, making them a less common but still valuable benefit for employees with HDHPs. If you are unsure whether your plan offers a limited-purpose FSA, check your employee benefits guide or talk to your HR representative.
Rarely Overlooked Flex Spending Eligible Expenses: Hidden Costs You Can Reimburse
Most employees focus on big-ticket eligible expenses like deductibles and prescription meds, but small, everyday costs can add up quickly and qualify for FSA reimbursement. These often-overlooked expenses can save you a few dollars each month, which adds up to significant savings over the course of a year.
Some of the most underrated flex spending eligible expenses include:
| Small Eligible Expense | Typical Cost Range |
|---|---|
| Medical-grade hand sanitizer | $5 – $10 |
| Prescription cough syrup and cold medicine | $8 – $15 |
| Bandages and medical tape | $3 – $7 |
| Menstrual care products (tampons, pads, cups) | $4 – $12 per pack |
Another often-overlooked eligible expense is travel costs for medical care. If you travel more than 50 miles to see a specialist or receive medical treatment that is not available locally, you can deduct gas, parking fees, and even lodging costs as flex spending eligible. For example, a family driving 120 miles to a children’s hospital for a specialist visit can reimburse themselves for the cost of gas and a hotel stay overnight.
The CARES Act expanded eligible FSA expenses to include menstrual care products in 2020, which was a major win for many employees. Before this change, menstrual products were considered ineligible, but now you can use your FSA funds to purchase these items just like any other medical expense. This change alone can save the average menstruating person up to $100 per year on necessary products.
How to Verify Flex Spending Eligible Expenses: Avoid Rejection and Maximize Your Benefits
One of the biggest mistakes employees make with their FSAs is submitting claims for ineligible expenses, which leads to rejected reimbursements and lost money. Verifying that an expense is flex spending eligible before you make a purchase can save you time and hassle later on.
There are four simple steps you can take to verify eligible expenses:
- Check your employer’s official FSA handbook or online portal for the most up-to-date eligible expense list
- Use your plan administrator’s free online lookup tool to search for specific items or services
- Ask your doctor, pharmacist, or care provider if an expense qualifies before you pay for it
- Save all receipts with a clear description of the medical purpose of the expense, since you’ll need to provide proof for reimbursement
In addition to verifying eligibility, it’s important to keep track of your FSA contributions and spending throughout the year. Many FSA administrators offer mobile apps that let you scan receipts, submit claims in seconds, and track your remaining balance, making it easy to stay on top of your benefits. You should also be aware of the deadline for submitting claims, which is usually 90 days after the end of your plan year.
If you are ever unsure whether an expense is eligible, don’t hesitate to reach out to your HR representative or FSA plan administrator. They have access to the most up-to-date IRS rules and can help you make informed decisions about your FSA spending. Taking a few minutes to verify eligibility can save you from losing out on tax-free reimbursement funds.
Common Misconceptions About Flex Spending Eligible Expenses
There are several common misconceptions about flex spending eligible expenses that lead employees to leave money on the table or submit rejected claims. Understanding these myths can help you make the most of your FSA benefits and avoid costly mistakes.
One of the most widespread myths is that all over-the-counter items are eligible for FSA reimbursement. Before 2020, this was not the case, and most OTC items required a prescription to qualify. While the CARES Act expanded eligibility for some OTC items, you still need a prescription for most non-prescription medications, except for insulin. You can check your plan’s rules to see which OTC items are eligible.
Another common myth is that you can use FSA funds to pay for health insurance premiums. While this is not allowed for most employees, there is one exception: if you are receiving unemployment benefits, you may be able to use your health FSA funds to pay for COBRA premiums. This is a rare exception, so it’s important to check your plan’s rules before assuming you can use your FSA for premium costs.
Finally, many people believe that they can carry over all of their unused FSA funds to the next plan year. While some employers offer a $500 carryover limit for health FSAs, most FSAs require you to use your funds by the end of the plan year or during the allowed grace period. Dependent care FSAs almost never offer a carryover option, so you’ll need to plan your spending carefully to avoid forfeiting unused funds.
Understanding what is flex spending eligible is the key to maximizing the tax-advantaged benefits of your FSA, whether you have a health, dependent care, or limited-purpose account. By learning the approved expenses, verifying claims ahead of time, and planning your contributions carefully, you can avoid leaving thousands of dollars in free money on the table each year. Whether you’re using your FSA to cover doctor’s copays, dependent care, or hidden medical expenses, taking the time to learn the rules will help you save money and reduce your out-of-pocket healthcare costs.
Next time you review your employee benefits package, take a close look at your FSA options and calculate your expected eligible expenses for the coming year. If you already have an FSA, pull up your plan’s eligible expense list today to make sure you’re using every dollar of your pre-tax benefits before the plan year ends. By staying informed and proactive, you can make the most of your flexible spending account and keep more money in your pocket each year.