State Tax Calculator (US)
Use this state tax calculator to estimate simplified US state income tax from annual income, deductions, an entered state tax rate, and optional federal tax. It is a flat-rate planning tool, not a state-by-state filing engine, so pair it with federal income tax, sales tax, or property tax when those pieces matter. This calculator auto-updates when values change.
State income tax details
This calculator auto-updates when values change.
This calculator uses a simplified flat state tax rate. Actual state income tax may use brackets, local taxes, credits, deductions, exemptions, reciprocity rules, and different treatment of income types.
Results
Results update automatically.
Estimated state income tax
$3,750.00
With taxable state income of $75,000.00 and a 5.00% rate, estimated state tax is $3,750.00.
Visual breakdown
State income tax alongside federal
This US state tax calculator estimates state income tax and take-home income using simplified assumptions.
State tax rules vary widely. Some states have no income tax, some use flat rates, and others use progressive brackets, local taxes, deductions, exemptions, and credits.
Use it for planning and comparison only. Actual tax can vary because of residency, filing status, local tax, deductions, credits, payroll treatment, and current state rules.
State Tax Example
If someone earns $70,000 and the simplified state tax estimate is 5%, the rough state tax would be $3,500 before considering deductions, credits, or local rules.
That does not mean every state would tax the income the same way. Moving between states or comparing job offers should include state income tax, local tax, sales tax, property tax, and cost of living.
When State Tax Changes the Decision
State tax matters when comparing job offers, remote work locations, retirement moves, side income, or relocation plans. A higher salary in one state may not leave more take-home pay after tax and living costs.
It is also worth looking beyond income tax. Some states with low or no income tax may rely more heavily on sales tax, property tax, vehicle tax, or local charges.
What to Check Before Filing
Confirm your residency status, filing status, deductions, credits, local taxes, and whether your income is taxable in more than one state. Multi-state work and remote work can be especially easy to misread.
Use this calculator for planning, then check current state guidance or a tax professional before filing. State rules and thresholds can change from year to year.
Using this state income tax estimate
Use this calculator for a simplified state income tax estimate from annual income, state deductions or exemptions, an entered state tax rate, and optional federal tax.
The component applies one flat state rate to income after deductions, then shows estimated state tax, effective state tax rate, federal tax included, and estimated take-home income.
It does not look up state brackets, local wage taxes, credits, residency rules, reciprocity rules, part-year returns, or income-type differences.
Use sales tax and property tax separately when comparing no-income-tax states or overall cost of living.
Label saved scenarios with the state, rate source, deduction assumption, and whether federal tax was included.
Common mistakes when estimating state income tax
Entering a marginal rate when an effective blended rate would better fit this flat-rate model.
Assuming the calculator knows state brackets, local wage tax, credits, exemptions, or special treatment of retirement and investment income.
Using this page for sales tax, property tax, or business gross receipts tax. Those are separate tax types.
Ignoring residency, part-year moves, remote-work sourcing, or reciprocity agreements.
Treating estimated take-home as a paycheck number. Payroll deductions, benefits, retirement, and withholding timing are outside this component.
Worked example: state income tax
Example: enter $75,000 of annual income, $0 state deductions, a 5% state tax rate, and $0 optional federal tax.
The calculator estimates taxable state income, state tax, effective state tax rate, and take-home after the state tax amount.
If you want a combined federal-plus-state view, enter a federal tax estimate from federal income tax.
Change the state rate when comparing locations, but keep notes on whether the rate is marginal, effective, official, or manually estimated.
Combining with related state tax estimates
Use federal income tax when the optional federal tax field needs an annual estimate.
Use sales tax for purchase-price tax and property tax for home or property tax estimates.
Use payroll tax for pay-period net pay; this page is annual state income tax arithmetic.
Use official state guidance or tax software for state brackets, credits, local add-ons, residency, and multi-state filing.
Checks before relying on the result
Check whether the entered rate should be marginal or effective for the scenario.
Check whether deductions, exemptions, credits, local taxes, or filing status change the taxable state income.
Check whether remote work, part-year residency, or moving states requires more than one state estimate.
When to rerun this estimate
Rerun this state tax calculator when income, deductions, state rate, federal tax estimate, work location, or residence changes.
Recheck before comparing job offers or relocation options, especially if sales tax, property tax, and housing cost differ as well.
If this estimate differs from state tax software, trace taxable income, rate, local taxes, credits, residency, and federal-tax inclusion separately.
Estimate state income tax
- 1
Enter annual income
State taxable income or gross depending on your planning approach.
- 2
Subtract state deductions / exemptions
Adjust to state taxable income if known.
- 3
Set estimated state tax rate
Flat or blended effective rate for your state.
- 4
Optional federal tax estimate
Review state tax and combined take-home context.
US state income tax: common questions
Which states have no income tax?
Several states impose no wage income tax — enter 0% rate for those.
Are state brackets modelled?
This uses a single rate you provide — use your state's effective rate or bracket tables for precision.
Can I deduct state tax federally?
SALT deduction limits apply on federal returns — separate from this estimate.
Do remote workers owe multiple states?
Multi-state allocation rules vary — this calculator is single-state.
Should I combine with federal calculator?
Yes for total take-home — run federal and state estimates together.
Should I rely on this state tax estimate when filing?
No. It is a simplified flat-rate estimate. Filing requires current state rules, brackets, credits, deductions, local taxes, residency rules, income sourcing, and complete records.
Disclaimer: This calculator provides simplified tax estimates for education and planning only. It is not tax, legal, accounting, or financial advice. Rules change by jurisdiction, filing status, and personal circumstances — verify results with official guidance or a qualified tax professional before filing or making decisions.