About this Calculator
This state income tax calculator covers all 50 US states and uses 2025 tax rates. Select your state and enter your income to see an estimated state tax liability. Nine states have no income tax: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming.
State income taxes vary significantly. California tops the list at 13.3% for high earners, while other states like Colorado and Illinois use flat rates. Many states also offer their own standard deductions, personal exemptions, and credits not reflected in this simplified calculator.
Frequently Asked Questions
Which states have no income tax?+
Nine states have no state income tax: Alaska, Florida, Nevada, New Hampshire (no wage tax), South Dakota, Tennessee, Texas, Washington, and Wyoming.
Does this calculator include local taxes?+
No. Many cities and counties (New York City, Philadelphia, Detroit) levy their own income taxes. This calculator shows statewide rates only.
What is a flat tax state?+
A flat tax state charges the same percentage rate regardless of income. Illinois (4.95%), Pennsylvania (3.07%), and Colorado (4.4%) are examples. Progressive states use brackets.
Can I deduct state taxes on my federal return?+
Yes, up to $10,000 in state and local taxes (SALT) can be deducted if you itemize on your federal return. The SALT deduction cap of $10,000 was established by the Tax Cuts and Jobs Act.