State Income Tax Calculator
Calculate state individual income tax liability across flat-rate states, graduated brackets, or zero-tax states, with monthly paycheck withholdings.
State Income Tax Liability
State Tax Liability Formula
State Taxable Income = Gross Income − State Deductions | Annual State Tax = State Taxable Income × (State Rate % ÷ 100) | Monthly Withholding = Annual Tax ÷ 12- Zero-Tax States: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming charge 0% on earned wage income.
- Flat Tax States: States like Pennsylvania (3.07%), Indiana (3.05%), North Carolina (4.50%), and Illinois (4.95%) levy a uniform single rate across all taxable income.
- Graduated States: States like California (up to 13.3%), New York (up to 10.9%), and New Jersey (up to 10.75%) use progressive tax brackets.
Step-by-Step Worked Example
Calculation Steps:
How to Use This Calculator
Assumptions & Limitations
- Deductions follow state tax code rules which may differ from federal standard deductions.
Frequently Asked Questions
Which states have no individual income tax?
Nine US states have no standard earned personal income tax: Alaska, Florida, Nevada, New Hampshire (dividends/interest only, expiring), South Dakota, Tennessee, Texas, Washington (capital gains only), and Wyoming.
Related Cost Calculators
Income Tax Calculator
Calculate comprehensive federal income taxes, FICA payroll withholdings (Social Security & Medicare), and state income taxes with standard deductions.
Federal Income Tax Calculator
Calculate progressive federal income tax liability with full 2024 IRS tax bracket breakdowns, 401(k)/HSA pretax deductions, and tax credits.
Local Income Tax Calculator
Calculate municipal, city, and county local income taxes (e.g. NYC, Philadelphia, Ohio RITA, Michigan cities) for residents and commuting non-residents.
Effective Tax Rate Calculator
Calculate your true blended effective tax rate across all federal, state, local, and FICA payroll taxes to see exactly what percentage of gross income you keep.