State Tax Calculator (US)
Free State Tax Calculator (US) for all 50 states. Enter income, state, and filing status to estimate state income tax, effective rate, taxable income, and bracket breakdown with interactive charts.
About This Calculator
The State Tax Calculator (US) helps you estimate state income tax for all 50 states and Washington DC. Select your state, enter your annual income, choose your filing status and tax year, and get instant results with a bracket-by-bracket breakdown and charts.
Nine states impose no personal income tax: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. Sixteen states use a flat tax rate (ranging from 2.5% in Arizona to 5.39% in Georgia), and the remaining states use progressive tax brackets. The calculator uses 2025 official tax rates and tax-year-appropriate federal standard deductions ($14,600/$29,200 for 2024; $15,000/$30,000 for 2025+).
Married Filing Jointly filers benefit from doubled bracket thresholds compared to single filers. The results show your total state income tax, effective tax rate, taxable income after standard deduction, and a breakdown of how much tax is owed in each bracket.
Regional Notes
United States: State income tax rules vary by state. Some states have no income tax, while others have flat or progressive rates. Local and county taxes are not included. This calculator is for estimation purposes; consult a tax professional for official filing.
Other regions: This calculator is designed exclusively for US state income tax. If you reside outside the US, use the Income Tax Calculator for your country's tax estimation.
Frequently Asked Questions
How does the State Tax Calculator (US) work?
Select your state, enter your annual income and filing status (Single or Married Filing Jointly). The calculator applies the selected state's tax brackets and rules to compute your state income tax liability, effective tax rate, taxable income after standard deduction, and a breakdown of tax by bracket.
Which states are covered by this calculator?
All 50 US states plus Washington DC are covered. Nine states (Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, Wyoming) have no state income tax. The remaining states use either a flat rate or progressive tax brackets based on 2025 rates.
What standard deduction does the calculator use?
The calculator applies tax-year-appropriate federal standard deductions: for 2024, $14,600 (single) / $29,200 (married joint); for 2025 and 2026, $15,000 (single) / $30,000 (married joint). Taxable income is your annual income minus this deduction.
How accurate are the state tax calculations?
Results are computed using official 2025 state income tax brackets and rates. The calculator provides a close estimate but does not account for every state-specific credit, exemption, or deduction. For precise filing, consult a tax professional or your state's revenue department.
Is this State Tax Calculator free to use?
Yes, the State Tax Calculator (US) is completely free to use with no registration or hidden charges. All inputs are saved in the URL so you can bookmark or share your exact calculation.
What filing statuses are supported?
The calculator supports Single and Married Filing Jointly filing statuses. For married joint filers, the tax bracket thresholds are doubled. Head of Household and Married Filing Separately are not yet supported.
What tax years are available?
You can select 2024, 2025, or 2026 as the tax year. The calculator uses 2025 state tax brackets for all years. State tax brackets may change each year due to inflation adjustments or legislative changes.
Does this calculator include federal income tax or FICA?
No, this calculator focuses exclusively on US state income tax. Federal income tax and FICA (Social Security and Medicare) are calculated separately using the Income Tax Calculator and FICA Tax Calculator available on Calculy.