Free US tax calculators
This page holds 72 calculators built specifically for the United States, for working out what you owe, what you keep, and how a change in income or a deduction shifts the result. Amounts are shown in US dollars ($), and the figures follow guidance published by the IRS for the calendar year ending 31 December. A calculator built for another country applies the wrong rates and thresholds without saying so, so every tool here is scoped to the United States rather than an international average.
Among the 72 calculators are 1099 Tax Calculator United States, Additional Medicare Tax Calculator United States, AMT Calculator (Alternative Minimum Tax) United States and Arizona Income Tax Calculator United States, among others, each opening with sensible defaults and showing a clear breakdown rather than a single number. Enter a few figures, read the result in plain language, and adjust the inputs to see how it moves. Everything runs in your browser, so results update as you type and nothing you enter is sent anywhere or stored.
How the figures stay accurate
Each calculator starts from the rates and thresholds the IRS actually publishes, applies them to the numbers you enter, and shows the working rather than just a total. When a rate or threshold changes, the figures behind the calculator are updated centrally, so you are working with current values for the calendar year ending 31 December, not a number carried over from an earlier year.
Common mistakes worth avoiding
Three slips come up more than any others. Mixing up gross and net: the figure before deductions and the one you actually receive can differ substantially, so check which one a calculator expects. Using last year’s numbers: rates and thresholds move, and an out-of-date figure quietly undermines an otherwise careful calculation. Treating one result as certain: run a cautious scenario and an optimistic one so you see a range rather than a single figure, especially before a decision with tax or legal consequences.
Frequently asked questions
Are these US tax calculators free?
Yes. All 72 calculators on this page are free, with no sign-up and no limit on how many times you run them.
Are the figures current?
They follow the IRS’s guidance for the calendar year ending 31 December and are updated as official figures change, rather than left to expire quietly.
Is my data private?
Yes. Each calculator runs in your browser, so what you enter is never uploaded, stored or shared.
Do these replace professional advice?
No. They give a reliable planning estimate. For anything with real tax or legal consequences, confirm the specifics with the IRS or a qualified adviser.
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