Tax Bracket Calculator for Arizona (AZ) — Free Calculator

Arizona Tax Brackets (2026)

Arizona uses a flat income tax system with a top marginal rate of 2.5% flat.

Arizona Bracket Structure

Flat 2.5% on all taxable income — effective as of January 1, 2023 (Prop 208 surcharge struck down)

Arizona moved to a flat 2.5% income tax in 2023, one of the lowest flat rates in the country. This replaced a graduated system with rates up to 8%. Prop 208's 3.5% surcharge on income over $250,000 was ruled unconstitutional.

Federal Tax Brackets Still Apply to Arizona Residents

Regardless of Arizona's state tax rules, all residents pay federal income tax. Federal brackets for 2024 range from 10% (on income up to $11,600 for single filers) to 37% (on income over $609,350). Your effective federal rate is typically well below the top marginal rate due to the graduated bracket structure.

Effective vs. Marginal Rate in Arizona

Your marginal rate is the rate on your last dollar of income. Your effective rate is your total tax divided by total income. For Arizona residents the marginal rate can reach 2.5% flat but most filers pay a lower effective rate. The median household income in Arizona is $65,913.

Data: Tax Foundation (2024), IRS Statistics of Income, US Census Bureau ACS 2023. Updated 2024–2025. Figures reflect state averages — consult a licensed CPA for personalized tax advice.

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Frequently Asked Questions

What tax brackets apply to Arizona residents?

Arizona has a flat income tax system. Flat 2.5% on all taxable income — effective as of January 1, 2023 (Prop 208 surcharge struck down). Federal brackets also apply on top of the state tax.

What is the difference between marginal and effective tax rate in Arizona?

Your marginal rate is the rate on your highest dollar of income. Your effective rate is your total tax burden divided by total income. In Arizona, even if the top marginal rate is 2.5% flat, most residents pay a lower effective rate because lower income portions are taxed at lower brackets.

Does Arizona have different tax brackets for married filers?

Yes, Arizona typically has different bracket thresholds for single vs. married filing jointly filers. Married joint filers often have brackets approximately twice as wide, reducing the marriage penalty. Check the Arizona Department of Revenue for current bracket tables.

How does this tax bracket calculator work for Arizona?

Enter your income and filing status. The calculator applies both federal and Arizona state tax brackets to show your marginal rate, effective rate, and total estimated tax. Arizona's flat rate of up to 2.5% flat is applied to your state taxable income.