State Income Tax Calculator
Calculate state income tax for California, New York, Illinois, Texas and Florida.
How to Use
- Enter your annual income.
- Choose your state.
- Select your filing status.
- Review your estimated state income tax.
Calculation Method
We apply your state's 2026 income tax brackets progressively to your income. States with no income tax (e.g., Texas, Florida) return $0.
For this MVP, brackets are applied to gross income; state-specific deductions and AGI adjustments are not yet modeled and will be added per state. Treat the result as an estimate.
Data source: each state's Department of Revenue.
Examples
Progressive CA brackets up to 9.3% marginal.
Texas has no state income tax.
Frequently Asked Questions
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Calculate →Disclaimer
This calculator provides estimates for informational and educational purposes only. SmartTaxCalcs does not provide tax advice. Your actual tax liability may differ based on your specific situation, recent law changes, and circumstances not modeled here (e.g., AMT, NIIT, special credits). We strongly recommend consulting a qualified tax professional (CPA, Enrolled Agent, or tax attorney) before filing or making financial decisions.
Data source: IRS Revenue Procedure / state Departments of Revenue. Last data update: May 19, 2026.