Understanding State Income Taxes
State income tax rates vary significantly across the United States. Some states have no income tax at all, while others use flat rates or progressive bracket systems. This calculator uses simplified effective rates for each state to give you a quick estimate.
Nine states currently have no state income tax. Among states that do levy income tax, rates range from under 3% to over 13% at the highest brackets. Your actual state tax may differ based on state-specific deductions, credits, and bracket structures.
Some states also allow local jurisdictions to impose additional income taxes. If you live in a city or county with a local income tax, enter that rate in the optional field for a more complete estimate.
Frequently Asked Questions
Which states have no income tax?
Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming do not levy a state income tax on earned income.
What is a flat tax state?
Flat tax states apply a single rate to all taxable income regardless of amount. Examples include Illinois, Colorado, Indiana, and Pennsylvania. This contrasts with progressive systems where higher income is taxed at higher rates.
Can I deduct state taxes on my federal return?
Yes, if you itemize deductions on your federal return, you can deduct up to $10,000 in combined state and local taxes (SALT). This cap was introduced in 2018 and affects taxpayers in higher-tax states.
Do I owe state tax where I live or where I work?
Generally you owe state tax to your state of residence. If you work in a different state, you may owe tax there too, but most states offer credits for taxes paid to other states to prevent double taxation.
How accurate are these state tax estimates?
These are simplified estimates using average effective rates. Actual state taxes depend on filing status, deductions, credits, and the specific bracket structure of each state. Use your state tax authority's calculator for precise figures.