Arizona's Income Tax Structure

Arizona has a progressive income tax system, meaning the tax rate increases as your income goes up. You pay different percentages on different portions of your income, not one flat rate on everything you earn. The state sets these rates annually, and they change slightly most years based on inflation adjustments.

For the 2024 tax year, Arizona has five tax brackets for single filers and five for married couples filing jointly. The lowest bracket starts at 2.55% and the highest reaches 4.5%. Your actual tax bill depends on which bracket your total income falls into, not on a single number applied to everything.

Arizona taxes wages, self-employment income, interest, dividends, and capital gains. Some types of income—like certain retirement distributions and Social Security benefits—may be partially or fully exempt, depending on your age and total income.

Key Takeaways

  • Arizona uses five tax brackets ranging from 2.55% to 4.5%, with rates increasing as income rises.
  • The exact rate you pay depends on your filing status (single, married filing jointly, head of household, or other) and your total taxable income.
  • Arizona adjusts its tax brackets yearly for inflation, so rates and income thresholds shift slightly each tax year.
  • Certain types of income, including some retirement withdrawals and Social Security benefits, may be partially or fully exempt from Arizona state income tax.
  • You report Arizona income tax on Form 140 (or 140-PZ for part-year residents) when you file your state return.

The Five Tax Brackets for 2024

Arizona's five brackets explore to your taxable income after deductions. For single filers in 2024, the brackets are roughly: 2.55% on income up to $30,000; 3.34% from $30,000 to $75,000; 4.17% from $75,000 to $110,000; 4.35% from $110,000 to $190,000; and 4.5% on income above $190,000. These thresholds shift slightly each year.

For married couples filing jointly, the income ranges are wider. The 2.55% rate applies to roughly the first $60,000 of combined income, and the top 4.5% rate kicks in above roughly $380,000. Head of household filers have their own set of thresholds, positioned between single and married rates.

The state publishes updated brackets each January on the Arizona Department of Revenue website. If you file your return in spring, check the current year's brackets rather than relying on the previous year's numbers.

How Progressive Tax Brackets Actually Work

A common mistake is thinking that moving into a higher bracket means your entire income gets taxed at that rate. That is not how it works. You only pay the higher rate on the income that falls within that bracket.

For example, a single filer earning $80,000 in 2024 does not pay 4.17% on all $80,000. Instead, they pay 2.55% on the first $30,000, 3.34% on the next $45,000 (from $30,000 to $75,000), and 4.17% on the remaining $5,000 (from $75,000 to $80,000). The total tax is roughly $2,500, not $3,336. Your effective tax rate—the percentage of your total income that goes to taxes—is lower than your top bracket rate.

Income Types That Arizona Taxes

Arizona taxes most forms of income the same way the federal government does. Wages from employment, self-employment income, rental income, and investment income (interest and dividends) are all subject to Arizona state income tax. If you received a W-2 or 1099 form, that income is taxable in Arizona unless a specific exemption applies.

Capital gains—profit from selling stocks, real estate, or other assets—are taxed as ordinary income in Arizona. There is no separate capital gains rate or preferential treatment, unlike some other states.

Income That May Be Exempt or Partially Exempt

Arizona offers partial or full exemptions for certain types of income. If you are 62 or older, you may exclude up to $2,500 of military retirement pay, federal retirement pay, or private pension income, depending on your total income. Social Security benefits are generally not taxed by Arizona, though they count toward the income thresholds that determine whether other income is taxed.

Distributions from certain retirement accounts—including traditional IRAs and 401(k)s—are taxable as ordinary income. However, if you are 55 or older and take distributions from a 401(k) due to separation from service, Arizona may allow you to exclude those distributions under specific conditions. Roth IRA withdrawals of contributions (not earnings) are never taxed.

Interest from U.S. Treasury bonds and certain municipal bonds may be exempt from Arizona tax. Check the Arizona Department of Revenue website or speak with a tax professional about your specific situation, as exemptions depend on the bond type and your income level.

How to Report Arizona Income Tax

You report your Arizona income tax on Form 140 (Arizona Resident Income Tax Return) or Form 140-PZ (Arizona Resident Income Tax Return—Part Year). Most residents use Form 140. Part-year residents—people who moved to or from Arizona during the year—use Form 140-PZ and report only the income earned while they lived in Arizona.

You file your Arizona return at the same time as your federal return, typically by April 15. If you file your federal return electronically, you can also file your Arizona return electronically through the state's approved e-file providers. The Arizona Department of Revenue accepts returns by mail as well.

When you file, you report your federal taxable income and then make adjustments specific to Arizona—adding back certain deductions that are allowed federally but not in Arizona, or subtracting income that Arizona exempts. Your Arizona tax is then calculated based on your Arizona taxable income and the current year's brackets.

Deductions and Credits That Lower Your Arizona Tax

Arizona allows a standard deduction similar to the federal standard deduction, though the Arizona amount is typically smaller. For 2024, the Arizona standard deduction for single filers is roughly $14,800 and for married filing jointly is roughly $29,600. You can also itemize deductions if they exceed the standard deduction, though Arizona does not allow all the same itemized deductions the federal government does.

Arizona offers tax credits—which reduce your tax dollar-for-dollar, rather than reducing your taxable income—for things like dependent care expenses, education savings, and charitable contributions to certain organizations. Credits are more valuable than deductions because they directly lower your tax bill. Check the Arizona Department of Revenue website for the full list of current credits and their income limits.

Frequently Asked Questions

Does Arizona tax Social Security benefits?

No, Arizona does not tax Social Security benefits. However, Social Security counts toward your total income when determining whether other income (like pensions or retirement account withdrawals) is taxed. If your total income is below certain thresholds, you may be able to exclude some retirement income even if you receive Social Security.

What is the difference between Arizona's tax rate and the federal tax rate?

Arizona and the federal government are separate tax systems with different rates and rules. Arizona's top rate is 4.5%, while the federal top rate is 37%. You owe both—your federal tax is calculated on your federal taxable income, and your Arizona tax is calculated on your Arizona taxable income. Some deductions and credits differ between the two systems.

Do I owe Arizona income tax if I moved to Arizona mid-year?

You owe Arizona income tax only on income earned while you lived in Arizona. Use Form 140-PZ to report part-year resident income. You will also file a return in your previous state for income earned there. Both states tax only the income earned within their borders during the time you lived there.

Can I reduce my Arizona taxable income with retirement account contributions?

Contributions to a traditional IRA or SEP-IRA may reduce your federal taxable income, and Arizona generally follows the federal rules. However, Arizona has its own limits and rules for certain retirement savings accounts. Contributions to a Roth IRA do not reduce your taxable income in either state. Speak with a tax professional about your specific situation.

Where do I find the current Arizona tax brackets?

The Arizona Department of Revenue publishes updated tax brackets each January on its website. You can also find them in the instructions for Form 140. Tax brackets change yearly due to inflation adjustments, so always use the current year's brackets when calculating your tax, not the previous year's.