United States
US federal tax refund calculator
Add your W-2 wages, side-business income and tax already paid to see an estimated refund or amount owing. No sign in needed.
How this US federal tax estimate works
Your W-2 wages and side-business profit are added together. Eligible business costs reduce that profit.
The calculator applies the standard deduction, estimates federal income tax and adds self-employment tax on business profit. It then subtracts federal tax already paid.
Your actual IRS result may differ because credits, state taxes and special deductions are outside this simple estimate.
Frequently asked questions
Self-employment profit is added to your other income for federal income tax. It may also be subject to self-employment tax for Social Security and Medicare.
You can subtract eligible business costs from business revenue. Keep records and enter only the amount you can claim for 2026.
It covers Social Security and Medicare for people working for themselves. It is separate from federal income tax.
That depends on your estimated tax and how much federal income tax you have already paid through withholding and estimated payments.
No. State and local taxes, credits and special deductions can change your final result.
Tax year, assumptions and sources
Uses 2026 federal tax rules for income earned 1 January to 31 December 2026. It assumes the standard deduction and one self-employed person.
Excludes state and local tax, credits, itemized and qualified business income deductions, Additional Medicare Tax, alternative minimum tax, age or blindness additions to the standard deduction, and special filing situations. Married filing separately may not qualify for the standard deduction if the spouse itemizes.