The State Income Calculator estimates income remaining after state-level deductions and an entered state tax rate. It starts with gross income, subtracts eligible state deductions, applies the rate to the resulting taxable income, and reports estimated net income after that tax.
The calculator supports paycheck planning, scenario comparisons, and rough state tax budgeting. It intentionally uses a simplified flat-rate model so that no particular state schedule is implied. Progressive brackets, credits, filing status, and special income adjustments may change the actual result.
Use income for the same annual or other period throughout the calculation.
Enter deductions that reduce the state tax base, not tax credits.
Use an applicable flat or blended rate for planning.
Compare taxable income, estimated tax, and net income.
Taxable income = max(Gross income − State deductions, 0)
Estimated state tax = Taxable income × State rate
Estimated net income = Gross income − Estimated state tax
TI = max(G − D, 0) Tax = TI × R Net = G − TaxR is entered as a percentage and converted to a decimal. The simplified model does not calculate progressive brackets or credits.
The main result estimates income left after the calculated state income tax only.
Payroll taxes, federal tax, local tax, benefits, and other deductions are not included.
Given: $75,000 gross income, $5,000 of state deductions, and a 5% rate.
Calculation: Taxable income = $75,000 − $5,000 = $70,000. State tax = $70,000 × 0.05 = $3,500. Net income = $75,000 − $3,500 = $71,500.
Result: Estimated net income after state income tax is $71,500.
Annual income is most common, but any period works if all inputs use the same period.
Taxable income is floored at zero; the calculator does not create a negative tax base.
They are not an input here. Credits reduce calculated tax rather than taxable income.
No. Enter a blended rate to approximate a progressive system.
The result subtracts only estimated state income tax, not federal tax, payroll deductions, benefits, or other withholding.