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Finance Calculators
State Tax Estimator
Estimate state income tax owed using simplified flat rates from a sample of US states with flat-rate income tax systems.
Estimated state tax
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Flat tax rate used
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About the State Tax Estimator
Several US states use a single flat income tax rate rather than progressive brackets, which makes estimating state tax liability straightforward: multiply taxable income by the flat rate.
Formula: Estimated State Tax = Taxable Income × Flat Rate
This calculator uses recent published flat rates for a sample of states as a simplified illustration. Actual state tax rules also include standard deductions, credits and local taxes that can change your real liability, and many states use progressive brackets instead — check your specific state's rules for precise figures.
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