Medical expenses paid with an FSA are not tax deductible. Flexible spending account contributions come out of your paycheck before federal income tax, Social Security tax, and Medicare tax are calculated, so the IRS treats that pre-tax treatment as the tax break for those dollars. Deducting the same expenses again on Schedule A would give you two benefits for one purchase, which federal law does not allow. Money you spend on medical care out of pocket, with after-tax dollars, is a different story and may qualify for the itemized medical expense deduction if it clears the 7.5% AGI threshold.
Why the Double Benefit Is Blocked
IRS Publication 502 states directly that you cannot include medical expenses in your itemized deductions if your flexible spending arrangement already reimbursed them with pre-tax contributions.1Internal Revenue Service. Publication 502 Medical and Dental Expenses Publication 969 says the same thing from the other direction: FSA-reimbursed amounts cannot be deducted on Schedule A.2Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans
The mechanics make the rule easy to see. FSAs exist under Section 125 of the Internal Revenue Code, the cafeteria plan provision, which lets you redirect part of your salary into the account before withholding.3Office of the Law Revision Counsel. 26 USC 125 – Cafeteria Plans Those diverted wages never appear in your gross income for tax purposes, so you pay less federal income tax, Social Security tax, and FUTA tax on every paycheck.4Internal Revenue Service. FAQs for Government Entities Regarding Cafeteria Plans By the time you swipe your FSA card at the pharmacy, you have already received the full tax advantage on that dollar. Claiming a deduction on top would reduce your taxable income twice for the same expense.
For 2026, the health FSA contribution cap is $3,400.5FSAFEDS. New 2026 Maximum Limit Updates A worker in the 22% federal bracket who contributes the full amount avoids roughly $748 in federal income tax, plus Social Security and Medicare on those wages. That is the tax benefit the code intends, and it happens automatically, whether or not you itemize.
Medical Costs You Can Deduct
The itemized medical expense deduction lives in Section 213 of the Internal Revenue Code. It covers unreimbursed medical costs you paid with after-tax money, and only the portion above 7.5% of your adjusted gross income counts.6Office of the Law Revision Counsel. 26 USC 213 – Medical, Dental, Etc., Expenses If your AGI is $100,000, the first $7,500 in out-of-pocket medical spending produces no deduction. Only what you spend above that floor reduces your taxable income.
The deduction is only available if you itemize instead of taking the standard deduction. For 2026, the standard deduction is $16,100 for single filers, $32,200 for joint filers, and $24,150 for heads of household.7Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Most taxpayers do better with the standard deduction, so the medical expense deduction has no practical effect for them. The FSA route, by contrast, delivers the tax break regardless of how you file.
Splitting FSA Spending From Out-of-Pocket Spending
Plenty of people run some medical costs through the FSA and pay others with a personal card or checking account. The two categories have to stay separate on your records, because only the after-tax side has any chance of being deducted. Say your FSA pays $2,000 for dental work and you spend $9,000 out of pocket on a surgery insurance did not cover. The $2,000 is permanently off the table for Schedule A. The $9,000 goes into the medical expense calculation and is deductible to the extent it exceeds 7.5% of your AGI.
Mixing the two up and accidentally listing FSA-reimbursed costs on Schedule A is a common error the IRS flags. Keep your FSA reimbursement statements in one place and your out-of-pocket receipts and Explanations of Benefits in another. If the IRS questions your medical deduction, you need to show that nothing on the Schedule A total was also paid by the FSA. Having your reimbursement history at hand makes that comparison quick. Note that the FSA side has its own substantiation rules: your plan administrator needs third-party documentation of the service, date, and amount for every claim, and your own attestation is not enough.8Internal Revenue Service. Notice 2006-69
One boundary worth naming: the no-double-deduction rule applies the same way to health savings accounts and to limited-purpose FSAs. Expenses reimbursed from any of these accounts cannot appear again on Schedule A.