Free 2025 tax calculators & tools
Estimate your tax, refund, take-home pay and self-employment tax in seconds — updated for the 2025 tax year.
2025 Income Tax Calculator
Estimate your 2025 federal income tax, bracket-by-bracket, plus your refund or balance due.
2025 Tax Refund Estimator
See your estimated 2025 federal refund — or what you'll owe — in seconds.
Paycheck Calculator
Calculate your take-home pay after federal tax, Social Security and Medicare.
Self-Employment Tax Calculator
1099 & freelancer self-employment tax, income tax, and quarterly estimated payments.
Sales Tax Calculator (by State)
Add sales tax by state — enter an amount and see the tax and total, with an optional local rate.
W-4 Withholding Calculator
Dial in your paycheck withholding so you don't owe a big bill or over-withhold all year.
Quarterly Estimated Tax Calculator
Estimate your quarterly 1040-ES payments for self-employment and other untaxed income.
2026 Tax Deadlines Tracker
Every key federal tax due date for the 2026 season, with a live countdown to the next one.
Tax reference & guides
Plain-English answers to the tax questions people search most — always free.
Free tax calculators that actually help you plan
Most people meet their tax bill once a year, in April, when it's too late to do anything about it. These calculators exist to change that. Each one is built on the current-year federal rules — the 2025 brackets, the standard deduction, Social Security and Medicare rates, the self-employment tax, and the Child Tax Credit — so you can see roughly where you stand before the year closes, not after.
They run entirely in your browser. There's no sign-up, no email wall, and nothing you enter leaves your device — so you can model a raise, a side gig, a new withholding on your W-4, or a quarterly estimated payment as many times as you want. The numbers update the moment you change an input, which makes them genuinely useful for the "what if" questions that actually move your refund or balance due.
Which calculator should you use?
- Estimating your whole tax year? Start with the income tax calculator for federal tax owed, then the refund calculator to compare it against what you've had withheld.
- Trying to read your paycheck? The paycheck calculator breaks down take-home pay after federal tax and FICA, and the W-4 calculator shows how to adjust withholding so you're not over- or under-paying.
- Self-employed or 1099? The self-employment tax calculator and estimated tax calculator handle the 15.3% SE tax and your quarterly 1040-ES payments.
- Buying something big? The sales tax calculator covers state and local rates; the deadline tracker keeps every 2026 filing date in view.
Common questions
Are these calculators accurate?
They use the official current-year federal brackets, standard deduction, FICA wage base, and credit amounts, and are checked against IRS figures. They're built for planning and estimates — your filed return can differ once every credit, deduction, and state rule is applied.
Do you store what I enter?
No. Every calculation runs in your browser. Nothing you type is sent to us or saved — refresh the page and it's gone.
Do they cover state taxes?
The sales tax calculator includes state and local rates, and the tax-brackets reference covers income tax rates for all 50 states. The income and paycheck calculators focus on federal figures, which are the largest part of most people's bill.
Who builds these?
UpTax — an AI tax preparation platform for U.S. CPA and accounting firms. The firms we work with prepare and review real returns all day; these free tools are a simpler, public version of the same accurate calculations.
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