Free Arizona Income Tax Calculator 2026 — Estimate Your AZ Tax

Enter your income, filing status, and deductions, and this calculator applies Arizona’s real 2026 flat rate of 2.5% on Arizona taxable income, the 2026 standard deduction, and the $40 family income tax credit to estimate your state tax, effective rate, and take-home pay. It runs entirely in your browser — your income is never typed into anyone’s server. Educational estimate only; it excludes federal tax, other credits, and local taxes.

How it works

The calculator subtracts pre-tax deductions and the standard deduction (or your itemized amount if larger) from gross income to get Arizona taxable income, then applies the flat 2.5% rate — every taxable dollar is taxed the same, with no brackets to climb. Finally it subtracts Arizona’s family income tax credit of $40 per household member (you, your spouse if filing jointly, and each dependent), floored at zero. Arizona’s standard deductions are set by the state legislature each year and are among the most generous for non-itemizers in the country.

Everyday uses

• Arizona workers — estimate your state withholding and check for an April surprise.
• New residents — see what the move costs you under Arizona’s flat tax before you relocate.
• Freelancers — rough out quarterly Arizona estimated payments (Form AZ-140ES).
• Job changers — compare offers by real take-home, not headline salary.
• Retirees — model how the $40-per-person credit trims a low Arizona bill toward zero.

Frequently asked questions

Why is Arizona’s rate flat instead of graduated like most states?

Arizona voters approved a 2.5% flat rate on taxable income that took effect in 2022, replacing the old five-bracket system. Your marginal and average rates move together — there is no bracket to “jump into” as you earn more.

What is the 2026 Arizona standard deduction?

$15,750 for single and married-filing-separately filers, $31,500 for married filing jointly, and $23,625 for head of household — up sharply in recent years to keep more low earners from owing tax.

How does the $40 family income tax credit work?

Arizona gives $40 per household member — you, your spouse on a joint return, and each dependent — subtracted directly from your computed tax, and the credit can’t reduce your tax below zero.

Is this tax advice?

No — it is an educational estimator using 2026 figures. Itemized deductions, other credits, and special income can change your real bill; a tax professional can advise on your situation.