State Tax — Smart Financial Analysis
Calculate state income tax, compare rates across states, and optimize your tax planning
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California: 13.3% top rate. Flat: same rate for all income (IL 4.95%, NC 4.75%, CO 4.4%). If you work in one state and live in another, you may owe both. State and Local Tax deduction allows federal deduction of state/local income and property taxes.
Ready to run the numbers?
Why: Nine states: Alaska, Florida, Nevada, New Hampshire (dividends/interest only), South Dakota, Tennessee (dividends/interest only through 2020), Texas, Washington, Wyoming. These ...
How: Enter Gross Income ($), State Tax Rate (%), Federal Tax Rate (%) to get instant results. Try the preset examples to see how different scenarios affect the outcome, then adjust to match your situation.
Run the calculator when you are ready.
📋 Quick Examples — Click to Load
📊 Tax Breakdown
Federal, state, FICA, and take-home amounts
🍩 Allocation
Take-home vs taxes breakdown
📊 State Comparison
Tax burden in different states
📈 Effective Rate by Income
Effective tax rate at different income levels
For educational purposes only — not financial advice. Consult a qualified advisor before making decisions.
💡 Money Facts
State Tax analysis is used by millions of people worldwide to make better financial decisions.
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— NBER Research
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State income taxes vary dramatically across the US, from 0% in nine states to 13.3% in California. For high earners, state tax differences can amount to tens of thousands of dollars annually. Understanding your state's tax structure, the SALT deduction cap, and how state taxes interact with federal obligations is essential for financial planning and location decisions.
Sources: Tax Foundation, IRS, State Revenue Departments, Urban-Brookings Tax Policy Center.
Key Takeaways
- • Nine states have no income tax; moving from CA to TX can save $20K+ annually for high earners
- • Flat tax states (IL, NC, CO) apply one rate to all income; progressive states use brackets
- • SALT cap at $10K limits federal deduction of state taxes, hurting high-tax state residents
- • After-tax = Gross − Federal − State − FICA; FICA is ~7.65% on wages
Did You Know?
How Does State Tax Work?
Flat Tax
Same rate for all income. State Tax = Taxable Income × Rate. Example: Illinois 4.95% on $80K taxable = $3,960.
Progressive Tax
Rates increase with income brackets. California ranges from 1% to 13.3%. Effective rate is typically lower than top marginal rate.
After-Tax Income
After-Tax = Gross Income − Federal Tax − State Tax − FICA. FICA (7.65%) applies to wages before deductions.
Expert Tips
State Tax Comparison
| State | Type | Top/Flat Rate |
|---|---|---|
| California | Progressive | 13.3% |
| Texas | None | 0% |
| New York | Progressive | 10.9% |
| Florida | None | 0% |
| Illinois | Flat | 4.95% |
Frequently Asked Questions
Which states have no income tax?
Nine states: Alaska, Florida, Nevada, New Hampshire (dividends/interest only), South Dakota, Tennessee (dividends/interest only through 2020), Texas, Washington, Wyoming. These states rely on sales tax, property tax, or oil revenue.
What is the highest state income tax?
California: 13.3% top rate. Hawaii: 11%. New Jersey: 10.75%. Oregon: 9.9%. Minnesota: 9.85%. New York: 10.9% (NYC adds 3.876%). High-tax states often have progressive brackets.
Flat vs progressive state tax?
Flat: same rate for all income (IL 4.95%, NC 4.75%, CO 4.4%). Progressive: rates increase with income (CA 1-13.3%). 13 states use flat rates. Flat tax is simpler but less progressive.
Do I owe taxes in multiple states?
If you work in one state and live in another, you may owe both. Many states have reciprocity agreements. Remote workers may face complex multi-state obligations since COVID.
What is SALT deduction?
State and Local Tax deduction allows federal deduction of state/local income and property taxes. Currently capped at $10,000 (TCJA 2017). This cap significantly impacts high-tax state residents.
How do state taxes affect where I should live?
A $200K earner saves ~$20K/year moving from California (13.3%) to Texas (0%). Over 10 years at 8% growth, that's $290K. But consider cost of living, services, and quality of life.
Key Statistics
Official Data Sources
⚠️ Disclaimer: This calculator is for educational purposes only. State tax rules vary by state and change frequently. Consult a tax professional for advice specific to your situation. Not financial or tax advice.
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