State Income Tax Calculator
Estimate your state income tax liability. Rates and structures vary significantly by state—from 0% to over 13%.
Calculate State Income Tax
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How It Works
State Tax Types
- No Income Tax (9 states): Alaska, Florida, Nevada, New Hampshire*, South Dakota, Tennessee*, Texas, Washington, Wyoming
- Flat Tax: Single rate on all income (e.g., Colorado 4.4%, Illinois 4.95%)
- Progressive Tax: Multiple brackets like federal (e.g., California 1-13.3%)
*NH and TN tax interest/dividends only, not wages.
SALT Deduction
State income taxes can be deducted on your federal return if you itemize, but total SALT (state + local taxes) is capped at $10,000.
State Rate Comparison
| State | Top Rate | Type |
|---|---|---|
| California | 13.3% | Progressive |
| New York | 10.9% | Progressive |
| New Jersey | 10.75% | Progressive |
| Illinois | 4.95% | Flat |
| Colorado | 4.4% | Flat |
| Texas | 0% | None |
| Florida | 0% | None |
What this calculator does
This page turns the visible tax inputs into a planning estimate that can be checked against official forms and records. It is designed for quick comparison, not as a substitute for professional tax advice.
How to use this calculator
- Enter the filing status, income, deduction, credit, withholding, and other fields that apply to your situation.
- Run the calculator and review the tax estimate, rate, deduction, or planning result shown on the page.
- Compare the result with IRS forms, state rules, and your own records before making payment or filing decisions.
Frequently Asked Questions
State income tax calculator by state?
Start with the key tax inputs and keep each number easy to verify. For the State Income Tax Calculator, start with state of residence, work state, wages, filing status, deductions, credits, withholding, and remote-work details. Then use: state tax is usually state taxable income x state rate, minus credits and withholding. Two people with the same federal income can owe very different state tax if one lives in a flat-tax state and the other in a graduated-rate state. Read the result as state tax estimate, withholding gap, and state comparison. Remote workers may need to check residency, nonresident returns, reciprocity, and local taxes.
How much state tax will I owe?
Separate each tax component so the estimate stays readable and easier to check. The State Income Tax Calculator works best when you enter state of residence, work state, wages, filing status, deductions, credits, withholding, and remote-work details. The planning formula is state tax is usually state taxable income x state rate, minus credits and withholding. Two people with the same federal income can owe very different state tax if one lives in a flat-tax state and the other in a graduated-rate state. Use the final number for state tax estimate, withholding gap, and state comparison. Remote workers may need to check residency, nonresident returns, reciprocity, and local taxes.
State tax calculator with federal income?
Use this as a planning estimate, then reconcile it with the actual tax forms. Enter state of residence, work state, wages, filing status, deductions, credits, withholding, and remote-work details in the State Income Tax Calculator. A practical formula is: state tax is usually state taxable income x state rate, minus credits and withholding. Two people with the same federal income can owe very different state tax if one lives in a flat-tax state and the other in a graduated-rate state. Review state tax estimate, withholding gap, and state comparison. Remote workers may need to check residency, nonresident returns, reciprocity, and local taxes.
State income tax rate calculator 2026?
The threshold or rate is only one part of the calculation. For the State Income Tax Calculator, start with state of residence, work state, wages, filing status, deductions, credits, withholding, and remote-work details. Then use: state tax is usually state taxable income x state rate, minus credits and withholding. Two people with the same federal income can owe very different state tax if one lives in a flat-tax state and the other in a graduated-rate state. Read the result as state tax estimate, withholding gap, and state comparison. Remote workers may need to check residency, nonresident returns, reciprocity, and local taxes.
Paycheck state income tax calculator?
Keep the inputs practical for this estimate. The State Income Tax Calculator works best when you enter state of residence, work state, wages, filing status, deductions, credits, withholding, and remote-work details. The planning formula is state tax is usually state taxable income x state rate, minus credits and withholding. Two people with the same federal income can owe very different state tax if one lives in a flat-tax state and the other in a graduated-rate state. Use the final number for state tax estimate, withholding gap, and state comparison. Remote workers may need to check residency, nonresident returns, reciprocity, and local taxes.
Compare state income taxes calculator?
Put the two choices in separate columns so the tradeoff is visible. In the State Income Tax Calculator, enter state of residence, work state, wages, filing status, deductions, credits, withholding, and remote-work details. The comparison should look at state tax estimate, withholding gap, and state comparison, not just gross income. The working formula is: state tax is usually state taxable income x state rate, minus credits and withholding. Two people with the same federal income can owe very different state tax if one lives in a flat-tax state and the other in a graduated-rate state. Remote workers may need to check residency, nonresident returns, reciprocity, and local taxes.
State tax calculator for remote workers?
Remote work can involve more than one state. Use the State Income Tax Calculator with state of residence, work state, wages, filing status. The working formula is state tax is usually state taxable income x state rate, minus credits and withholding. Two people with the same federal income can owe very different state tax if one lives in a flat-tax state and the other in a graduated-rate state. Check state tax estimate, withholding gap. Remote workers may need to check residency, nonresident returns, reciprocity, and local taxes.
Use Cases
- Estimating state income tax liability for your current state of residence
- Comparing state tax rates when considering relocation to a different state
- Calculating your combined federal and state effective tax rate
- Understanding how state taxes interact with the federal SALT deduction cap
- Planning income timing or residency changes to minimize state tax exposure
Assumptions & Limitations
- Uses simplified state tax rates and brackets that may not reflect all state-specific adjustments
- Does not account for state-specific deductions, credits, or exemptions beyond the basics
- Local income taxes (city, county) are not included in the calculation
- Part-year resident and multi-state filing situations are not supported
- Some states use federal AGI as a starting point while others have unique calculations
- Nine states have no state income tax: AK, FL, NV, NH, SD, TN, TX, WA, WY
Sources & References
- IRS Form 1040 Instructions — Federal tax return (state taxes interact with federal)
- IRS Schedule A — SALT deduction for state income taxes paid
- IRS Topic No. 503 — Deductible Taxes
- State tax agency websites — For current rates, brackets, and filing requirements
- IRS Publication 600 — State and Local General Sales Taxes (alternative to income tax deduction)
Disclaimer: This calculator provides estimates for educational purposes only. It does not constitute tax advice. Consult a qualified tax professional for advice specific to your situation.