Where to find the numbers
- Wages: W-2 box 1. It is already lower than your gross pay by your 401(k) and other pre-tax deductions, so do not subtract them again.
- Federal tax withheld: W-2 box 2. Add the boxes from every W-2 if you had more than one job.
- State tax withheld: W-2 box 17.
- No W-2 yet? Use your last pay stub of the year: year-to-date gross pay minus pre-tax deductions, and year-to-date federal and state income tax.
What the estimate includes
2026 federal brackets and the standard deduction ($16,100 single, $32,200 married filing jointly, $24,150 head of household), the child tax credit of $2,200 per child under 17 including its refundable part, self-employment tax, the 0.9% Additional Medicare tax and your state's income tax. It does not include itemized deductions, education or energy credits, the earned income credit or local income taxes, which can make your actual refund larger.
Your refund is only as accurate as the withholding you enter. The IRS Where's My Refund? tool tracks a return you have already filed.
Sources: IRS Rev. Proc. 2025-32. See our methodology.