For a health FSA, there is no separate tax form for an FSA and nothing extra to file: your employer already subtracted your contributions from the taxable wages reported on your W-2, so the tax benefit is built in. A dependent care FSA is the exception. Those contributions appear in Box 10 of your W-2, and you have to complete Part III of Form 2441 with your return to keep them tax-free.
Why a Health FSA Doesn’t Generate Its Own Form
If you’re looking through your tax documents for a 1099 or another form tied to your health FSA, you won’t find one. The IRS doesn’t require it. Your employer withholds FSA contributions from your paycheck before calculating income and payroll taxes, so those dollars never count as taxable income. There is nothing to report on your return because the money was never counted as earnings in the first place.1Internal Revenue Service. Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans
This trips people up partly because Health Savings Accounts look similar but work differently at tax time. HSA distributions generate a Form 1099-SA that you reconcile on your return.2Internal Revenue Service. About Form 1099-SA, Distributions From an HSA, Archer MSA, or Medicare Advantage MSA Health FSAs skip that step. The reduced wage totals on your W-2 are the only paper trail the IRS needs.
How Your W-2 Shows Your Health FSA Contributions
Your employer reflects your health FSA contributions indirectly by lowering three W-2 boxes. Box 1 (wages, tips, other compensation), Box 3 (Social Security wages), and Box 5 (Medicare wages) all exclude the money you directed into your health FSA during the year.3Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026) That is where the tax savings live: less federal income tax, less Social Security tax, and less Medicare tax on every dollar you routed to the account.
There is no dedicated Box 12 code for health FSA salary reductions. Some employers voluntarily note the amount in Box 14 (labeled “Other”) as a courtesy, but nothing in Box 14 changes your tax calculation. If you compare your final pay stub’s gross earnings to the figure in Box 1, the gap will include your health FSA contributions along with any other pre-tax benefits, such as retirement plan deferrals.
For 2026, the maximum you can put into a health FSA through salary reduction is $3,400.3Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026) Your employer enforces this cap. You do not track it on your tax return or report it anywhere when you file.
Dependent Care FSA Reporting on Form 2441
Dependent Care FSAs are the exception to the no-extra-paperwork rule. If you set aside pre-tax money through your employer for childcare or adult dependent care, you have a reporting job at filing time. The amount your employer contributed or withheld on your behalf appears in Box 10 of your W-2.4Internal Revenue Service. Employee Reimbursements, Form W-2, Wage Inquiries You then use that figure to complete Part III of Form 2441 (Child and Dependent Care Expenses), which determines how much of the benefit stays excluded from income.5Internal Revenue Service. Instructions for Form 2441 (2025)
To fill out Form 2441, you’ll need each care provider’s name, address, and taxpayer identification number or Social Security number. If your employer arranged the care directly, you can enter your employer’s name and write “See W-2” for the address.6Internal Revenue Service. 2025 Instructions for Form 2441 Child and Dependent Care Expenses Gather this information before you sit down to file. Missing or incorrect provider details can cause the IRS to disallow your exclusion.
A meaningful change for 2026: the maximum you can exclude from income through a dependent care assistance program rises to $7,500 per household, up from the $5,000 cap that had been in place for decades. If you’re married filing separately, the limit is $3,750.7Office of the Law Revision Counsel. 26 U.S. Code 129 – Dependent Care Assistance Programs Any dependent care benefits above the exclusion limit get added back into your taxable wages in Box 1 of your W-2.4Internal Revenue Service. Employee Reimbursements, Form W-2, Wage Inquiries
How a Dependent Care FSA Interacts With the Tax Credit
This is where filers leave money on the table or accidentally double-dip. Every dollar you exclude from income through your Dependent Care FSA reduces the maximum expenses you can claim for the Child and Dependent Care Tax Credit. The credit allows up to $3,000 in qualifying expenses for one dependent or $6,000 for two or more. Subtract your excluded FSA benefits from that cap to find what is left for the credit.8Internal Revenue Service. Publication 503 (2025), Child and Dependent Care Expenses
The math gets stark with the new $7,500 exclusion limit. If you exclude the full $7,500 through your Dependent Care FSA, you exceed the $6,000 credit cap entirely, meaning you cannot claim any Child and Dependent Care Tax Credit at all. Under the old $5,000 limit, someone with two qualifying dependents could exclude $5,000 through the FSA and still claim the credit on up to $1,000 in additional expenses. That option disappears if you max out the higher limit. Whether the FSA or the credit saves you more depends on your tax bracket and the credit percentage you’d qualify for, so this is worth running both ways in tax software before your plan year starts.
Form 2441 walks you through this calculation in Parts II and III. You must complete Part III (the dependent care benefits reconciliation) before calculating the credit in Part II. The form will not let you count the same expenses twice.6Internal Revenue Service. 2025 Instructions for Form 2441 Child and Dependent Care Expenses
When a Health FSA Does Trigger a Tax Form
FSA reimbursements stay tax-free only when they cover qualified expenses. For health FSAs, that means medical, dental, and vision costs that meet the IRS definition. If you receive a reimbursement and cannot produce documentation proving the expense qualifies, or if you used the funds for something clearly ineligible, the amount gets added to your gross income and becomes subject to income tax and payroll taxes.
Most FSA administrators handle this by requesting receipts or an explanation of benefits within a set window. If you don’t respond, the administrator will typically try to recover the money, either by offsetting it against future claims or by reducing your reimbursement. If the amount isn’t repaid by year-end, you may receive a Form 1099 reporting the unsubstantiated amount as taxable income. This is one of the rare situations where a health FSA does generate a tax document, and it is not one you want to see.
Save every receipt and explanation of benefits statement from your insurer. Most FSA administrators let you upload documentation through an online portal. Five minutes of uploading a receipt after an appointment is far easier than reconstructing records months later.
Fixing a W-2 That Gets Your FSA Wrong
If your W-2 shows the wrong amount in Box 10 for dependent care benefits, or if your wages in Box 1 don’t reflect the health FSA deductions you expected, contact your employer’s payroll department first. Employers can issue a corrected W-2 (Form W-2c) to fix the error.
When your employer doesn’t respond or refuses to correct the form, you have a backup path. If no corrected W-2 arrives by the end of February, call the IRS at 800-829-1040 or visit a Taxpayer Assistance Center. The IRS will send your employer a letter requesting a corrected form within ten days. If that still doesn’t resolve it, the IRS will send you Form 4852, which serves as a substitute W-2. You’ll estimate your wages and withholding based on your final pay stub and attach Form 4852 to your return.9Internal Revenue Service. W-2 – Additional, Incorrect, Lost, Non-Receipt, Omitted
Filing with Form 4852 can delay your refund while the IRS verifies the information. If a corrected W-2 eventually arrives and the numbers differ from what you reported, you will need to file an amended return using Form 1040-X.9Internal Revenue Service. W-2 – Additional, Incorrect, Lost, Non-Receipt, Omitted
How Long to Keep Your FSA Records
Keep all FSA-related receipts, explanations of benefits, and year-end account statements for at least three years after filing the return they relate to. That matches the IRS’s general statute of limitations for auditing income and deductions.10Internal Revenue Service. How Long Should I Keep Records These documents don’t get attached to your tax return, but if the IRS questions whether your FSA reimbursements covered qualified expenses, you’ll need them to prove it.
Most third-party FSA administrators keep transaction histories available online for one to two years after the plan year closes, then archive or delete them. Download a full transaction summary before your administrator removes access. Organizing records by date and expense type makes it easier to respond quickly if you receive an IRS inquiry.