State Income Tax Calculator

Archived historical, non-current snapshot — dated July 9, 2026 (2026-07-09). The state rate schedules, standard deductions, filing-status multipliers, and optional local-tax assumptions described below may not reflect current state tax rules. Check authoritative sources for the applicable period before relying on this estimate.

The State Income Tax Calculator gives a quick, transparent estimate of state income tax across the United States. It is designed for comparison: choose a state, choose a filing status, enter annual gross income, add any extra deductions you want to model, and optionally include a flat local income tax rate. The result separates the state income tax, local estimate, taxable income used, effective rate, and marginal state rate, so you can see both the total and the assumptions behind it.

This page is intentionally a general overview rather than a substitute for a state return. U.S. states do not share one tax system. California and New York use progressive schedules, Illinois uses a flat individual income tax, and Texas and Florida do not impose a broad wage income tax. A state with no income tax may lean more heavily on sales tax, property tax, business taxes, or local revenue. A state with high top brackets may still tax the first slices of income more gently than the headline rate suggests. Use the calculator to orient a budget, compare job offers, or test a move, then check official state guidance before filing or making a large financial decision.

How to use this calculator

Select the state where the income is taxed. The calculator defaults to California, but you can choose any listed state or the District of Columbia. Next, choose filing status. In this calculator, single uses the base brackets, married filing jointly doubles many thresholds, and head of household uses a one and one-half multiplier. Enter annual gross income before state withholding. If you want to model itemized deductions, retirement subtractions, or other planning adjustments, enter them in Additional deductions. Finally, enter a city or county income tax rate only if you know one applies to your situation.

The local field is deliberately simple: it multiplies gross income by the local rate you enter. That makes it useful for a rough city-tax scenario, but it does not reproduce every local wage base, exemption, resident rule, or credit. If your city tax is material, use the official local instructions for compliance.

What the calculator includes

The calculator includes a built-in state rule for each state that has a broad income tax in the dataset. Each rule has a label, a standard deduction estimate, and a bracket schedule. For no-income-tax states, the state tax line is set to zero and the note explains that only the optional local field can change the income-tax estimate. For other states, the calculator subtracts the standard deduction and your additional deductions from gross income, floors taxable income at zero, and then taxes each slice of taxable income at its assigned rate.

The estimate does not include federal income tax, payroll tax, refundable credits, state child credits, retirement-income exclusions, resident versus nonresident allocation, alternative taxes, local withholding rules, or phaseouts. For broader household planning, compare this state estimate with the salary calculator, the budget calculator, and the sales tax calculator. If debt payments are part of your move or job decision, the debt-to-income calculator can help connect after-tax cash flow to borrowing capacity.

Formula

The calculator first creates taxable income:

$\text{taxable income} = \max(0, \text{gross income} - \text{standard deduction} - \text{additional deductions})$

It then applies each bracket only to the slice of income inside that bracket:

$\text{state tax} = \sum \left(\text{taxable slice}_i \cdot \text{state rate}_i\right)$

The optional local estimate is added separately:

$\text{total estimate} = \text{state tax} + \left(\text{gross income} \cdot \text{local rate}\right)$

Effective rate is the total estimate divided by gross income. Marginal state rate is the bracket rate that applies to the last dollar of taxable income in the selected state model.

Checking the primary result

Suppose the inputs are the defaults for a California comparison: California, single, $80,000 of annual gross income, $0 additional deductions, and 0% local tax. The state rule used by this overview calculator has a $5,363 standard deduction for a single filer. Taxable income is therefore $80,000 minus $5,363, or $74,637.

The calculator taxes the first $10,756 at 1%, the next slice through $25,499 at 2%, the next slice through $40,245 at 4%, the next slice through $55,866 at 6%, the next slice through $70,606 at 8%, and the remaining $4,031 at 9.3%. That produces $3,483.60 of state income tax. Because the local tax rate is zero, the local estimate is $0.00, total estimated state plus local tax is $3,483.60, the effective rate is about 4.35%, and the marginal state rate shown is 9.3%.

Now change only the state to Texas. Texas is in the calculator’s no-broad-wage- income-tax set, so the state income tax line becomes $0.00. If the local rate field remains zero, the total income-tax estimate is also $0.00. That does not mean Texas is tax-free; it means the income-tax portion of this specific calculator is zero.

How to interpret state differences

Do not rank states by top marginal rate alone. Progressive systems tax income in layers, so a high top rate may apply only after a large threshold. Flat-tax states apply one rate to most taxable income after exemptions or deductions. No-income-tax states may shift the burden to sales or property taxes. A renter with modest taxable income may experience a state very differently from a high- income homeowner, retiree, or business owner.

Also watch the definition of income. Some states begin with federal adjusted gross income, some use federal taxable income with adjustments, and some have special rules for retirement income, municipal bonds, pass-through businesses, or nonresidents. This calculator intentionally keeps the inputs simple, so the result is best for screening scenarios rather than filing.

Tips for better estimates

• Use annual income, not monthly pay.
• Enter additional deductions only when you have a reasonable state-specific adjustment to model.
• Add a local rate only when you know the city or county charges one.
• Compare income tax with sales tax, property tax, and housing costs before deciding one state is cheaper.
• Recheck official state sources each year because rates, deductions, credits, and thresholds can change.

Informational note

This calculator is for education and planning only. It is not tax advice, legal advice, or a filing tool. State and local tax rules change, and official tax agencies, current forms, and qualified tax professionals should control for returns, withholding elections, residency questions, and compliance.

Sources

• IRS, Federal income tax rates and brackets — federal context for how marginal brackets work.
• California Franchise Tax Board, 2025 Form 540 tax booklet — official California personal income tax instructions and tables.
• New York State Department of Taxation and Finance, New York tax tables — official New York personal income tax table reference.
• Texas Comptroller, Sales and use tax — example of taxes residents may pay in a state without broad wage income tax.