Your Free FSA Expenses Information Guide

What This FSA Information Guide Covers

A Flexible Spending Account, or FSA, is a workplace benefit that lets employees set aside pretax money to pay for healthcare expenses. This guide provides information about how FSAs work, what expenses they cover, and how the money functions throughout the year.

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The guide does not determine whether you personally can open an FSA—that depends on your employer's plan offerings and your employment status. Instead, it explains the basic mechanics of FSAs so you understand how this type of account operates if your workplace offers one.

FSAs are governed by federal tax law, specifically Section 125 of the Internal Revenue Code. The rules for what counts as an allowable expense and how money can be used are defined by the IRS and do not change based on individual circumstances. This guide walks through those standard rules so you know what information exists and where the boundaries lie.

Understanding FSA basics matters because these accounts can reduce your out-of-pocket healthcare costs significantly—but only if you use them correctly. Mistakes like spending FSA money on ineligible items can result in tax penalties and loss of funds. This guide helps you learn the facts so you can make informed choices about whether and how to use an FSA if one is open to you.

Practical Takeaway: Use this guide as a reference tool when you have questions about FSA rules. Keep it handy during open enrollment periods or when reviewing statements from your FSA account administrator.

How FSAs Work: The Basic Structure

An FSA operates through payroll deductions. You decide how much money you want to set aside each year—within legal limits—and that amount is deducted from your paychecks before taxes are calculated. Because the money comes out before federal income tax, Social Security tax, and Medicare tax are applied, you pay less in taxes overall. This creates immediate savings for many workers.

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For 2024, the IRS limits FSA contributions to $3,200 per year per individual. This limit may change annually. The money you contribute sits in an account managed by a third-party administrator chosen by your employer. When you incur eligible healthcare expenses, you can use FSA funds to reimburse yourself by submitting a claim, using a debit card issued by the plan, or paying out of pocket and requesting reimbursement later.

FSAs operate on a "use-it-or-lose-it" basis. Money you contribute in a given calendar year must be spent on eligible expenses by the end of that year—with a small exception. Employers can offer a grace period of up to 2.5 months into the following year, during which you can still spend money from the previous year's contribution. Some employers instead allow employees to carry over up to $640 of unused funds (this amount can change annually). Your employer chooses which option applies, or neither.

This structure makes FSAs different from Health Savings Accounts (HSAs), which allow unused money to roll over indefinitely and can be invested like retirement accounts. FSAs are designed for shorter-term spending and provide an immediate tax break rather than long-term savings growth.

The money in an FSA never belongs to your employer. It is your money, held and managed on your behalf. If you leave your job, you typically cannot access unused FSA funds—this is a critical difference from HSAs and is one reason the use-it-or-lose-it rule exists.

Practical Takeaway: Before enrolling in an FSA, estimate your likely healthcare expenses for the coming year. Contribute an amount you believe you can spend, keeping in mind that unused money generally cannot be recovered.

Eligible Expenses: What FSA Money Can Cover

The IRS publishes an official list of medical expenses that qualify for FSA reimbursement. This list is extensive and covers far more than many people realize. Eligible expenses include copayments, coinsurance, deductibles, and premiums for health insurance—though not all premium types qualify. FSA money can also reimburse you for prescription medications, insulin, and other prescribed drugs.

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Dental care expenses qualify, including cleanings, fillings, root canals, crowns, orthodontia, and extractions. Vision care also qualifies: eye exams, glasses, contact lenses, and lens solution all count as eligible expenses. Hearing aids and related services are covered. Many people do not realize they can use FSA funds for these common expenses and end up overfunding their accounts in other categories.

Medical equipment and supplies form a broad category of eligible expenses. This includes items such as crutches, wheelchairs, blood pressure monitors, thermometers, bandages, heating pads, and braces. Diabetic supplies—test strips, lancets, and glucose monitors—are eligible. Over-the-counter medicines became eligible again in 2020 and remain so; common examples include pain relievers, cold and flu medications, antacids, and allergy medicines. You do not need a prescription for these items to use FSA funds.

Some expenses people often wonder about are not eligible. Cosmetic procedures, vitamins (unless prescribed by a doctor for a specific medical condition), gym memberships, and general wellness programs are not covered. Toiletries and personal hygiene items do not qualify, even if they relate to health. Hairpieces do not qualify even if medically necessary. Travel to seek medical care is not eligible, nor is the cost of lodging while away for treatment. However, the actual medical services received during that travel do qualify.

Certain dental and vision expenses have specific rules. Cosmetic dentistry—such as teeth whitening for appearance rather than health—does not qualify. However, cosmetic procedures that are medically necessary (such as surgery to correct a deviated septum) do qualify. Similarly, cosmetic vision procedures like LASIK may or may not qualify depending on whether they address a medical condition or are purely elective.

Practical Takeaway: Review the IRS's Publication 502 (Medical and Dental Expenses) for the complete list of eligible expenses. When you are unsure about a specific item, check this resource or contact your FSA plan administrator before spending money, to avoid using FSA funds on ineligible items.

Documentation and Claims: How to Get Reimbursed

Using FSA money requires documentation. When you submit a claim for reimbursement, you must provide proof that the expense was incurred and that it is eligible. Proof typically includes a receipt, invoice, or explanation of benefits (EOB) from your healthcare provider showing the date, the service or item provided, the amount charged, and often the provider's name and tax identification number.

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Many FSA plans issue debit cards that can be used at pharmacies, doctors' offices, and other healthcare providers. When you use the card at a qualifying merchant, the transaction is often substantiated automatically—meaning the merchant's system confirms that the expense type is eligible, and you do not need to submit additional documentation. However, some FSA plans require you to submit receipts even for debit card transactions, depending on the expense category and the plan's rules.

For out-of-pocket expenses that you pay with personal funds and want reimbursed, the process is more manual. You pay the provider out of pocket, then submit a claim to your FSA administrator with supporting documentation. The administrator reviews the claim to verify the expense is eligible and that you have not already been reimbursed through insurance. Once approved, you receive a check or direct deposit reimbursement.

The claims process typically works through an online portal, by mail, or through a mobile app provided by your plan administrator. Processing times vary but often take 5 to 10 business days. Some plans offer expedited processing. You should keep your own records of all receipts and submitted claims to verify that reimbursements were received correctly and to document the expenses if you are audited.

Dependent care FSAs—a separate type of account used for childcare or elder care expenses—have slightly different documentation requirements. You must document the name, address, and tax ID of the care provider, along with the dates and amounts paid. These requirements exist because dependent care FSAs have specific IRS rules tied to tax credits.

Plan administrators are required to verify that claimed expenses are eligible. If documentation is missing or unclear, they will request additional information before processing the claim. Submitting complete documentation the first time speeds up the reimbursement process.

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