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For calculator corrections, please include the calculator URL and the specific value or result that appears incorrect.
Common Questions
Are the calculators free to use?
Yes, completely free. No account required, no paywall, no trial period. All 151+ calculators are free indefinitely, supported by display advertising.
How often are tax rates updated?
We update all calculators annually in December/January when IRS publishes new Publication 15 rates and SSA announces the Social Security wage base. Mid-year updates occur when state legislatures change rates.
Can I use these for official tax filing?
Our calculators are for estimation purposes only and should not be used as the sole basis for tax filing. For official payroll processing, use certified payroll software. For tax filing, consult a licensed CPA or enrolled agent.