Yes. Arizona has an income tax, and it’s a flat 2.5% on your Arizona taxable income, no matter what you earn or how you file.1Arizona Department of Revenue. Individual Income Tax Highlights The single rate replaced the old graduated brackets starting with the 2023 tax year.
The 2.5% applies to taxable income, not gross pay. You start with your federal adjusted gross income, apply Arizona’s additions and subtractions, then take either the standard deduction or itemized deductions. The rate hits only what’s left, so your effective rate on total earnings is almost always below 2.5%.
Who Has to File an Arizona Return
Filing turns on how much you made and where you lived.
You must file if your gross income exceeds the threshold for your filing status:
- Single or married filing separately: $15,750
- Married filing jointly: $31,500
- Head of household: $23,625
These match Arizona’s standard deduction amounts. Earn less than the threshold and you generally owe no Arizona income tax and don’t have to file.1Arizona Department of Revenue. Individual Income Tax Highlights
Residency decides which form and which income. Full-year residents file Form 140 and owe tax on everything they earned, wherever earned. If you moved in or out of Arizona during the year, you’re a part-year resident and file Form 140PY. Non-residents file Form 140NR and owe only on Arizona-source income: wages for work done in the state, business income generated here, and gains from selling Arizona real estate.2Arizona Department of Revenue. 2025 Arizona Form 140 Instructions
Standard Deduction or Itemize
Arizona’s standard deduction tracks the filing thresholds: $15,750 single or married filing separately, $31,500 joint, $23,625 head of household.
Here’s a quirk worth knowing. Arizona lets you itemize on your state return even if you took the standard deduction federally.1Arizona Department of Revenue. Individual Income Tax Highlights If your Arizona-eligible itemized deductions beat the standard amount, run the numbers both ways.
Arizona also lets non-itemizers increase their standard deduction by a percentage of qualifying charitable contributions, so even taxpayers who don’t itemize get some benefit from charitable giving.
Credits That Directly Cut Your Tax
A credit reduces the tax you owe dollar for dollar, which is why Arizona’s credits often matter more than its deductions.
Dependent Credit
Claim $100 for each dependent under 17 and $25 for each dependent 17 or older. The credit phases out above $200,000 federal AGI for single filers and $400,000 for joint filers.3Arizona Department of Revenue. 2025 Arizona Form 140ET Instructions
Family Income Tax Credit
Lower-income households can claim $40 for each family member, counting up to two parents and four children. The cap is $240 on a joint or head of household return and $120 for a single filer with no dependents.
Charitable and School Credits
Arizona’s credits for donations to qualifying charitable organizations (QCOs), qualifying foster care charities (QFCOs), and public schools are unusually generous. For 2026, the QCO cap is $506 for single filers and $1,009 for joint filers.4Arizona Department of Revenue. Credits for Contributions to QCOs and QFCOs They’re non-refundable, so they can zero out your bill but won’t produce a refund on their own. A joint-filing couple who donates $1,009 to a qualifying charity effectively gets that full amount back as a reduction in state tax owed.
Retirement, Social Security, and Military Pay
Arizona does not tax Social Security benefits. Whatever portion of your benefits ended up in your federal AGI gets subtracted on the Arizona return.5Arizona Legislature. Arizona Revised Statutes Title 43 – 1022 – Subtractions From Arizona Gross Income
Pension treatment is narrower. Arizona allows a subtraction of up to $2,500 for benefits from federal government retirement systems and certain Arizona public employee retirement plans. Anything above that, and all distributions from private 401(k) or IRA accounts, is fully taxable at 2.5%.5Arizona Legislature. Arizona Revised Statutes Title 43 – 1022 – Subtractions From Arizona Gross Income
Active-duty military members whose only income is military pay generally don’t need to file an Arizona return, as long as no Arizona tax was withheld. If any was withheld, file to get it back.6Arizona Department of Revenue. Military Tax Filing Military retirees do better still: retired or retainer pay from the uniformed services is fully subtracted and completely tax-free at the state level.5Arizona Legislature. Arizona Revised Statutes Title 43 – 1022 – Subtractions From Arizona Gross Income
Withholding and Estimated Payments
Arizona withholding works differently from most states. Instead of tables based on income and allowances, you pick a flat withholding percentage on Form A-4 when you start a job. Skip the form and your employer withholds at a default rate. With a tax rate of only 2.5%, picking the right percentage matters: too high and you wait for a refund, too low and you owe in April.
Self-employed filers and anyone with significant income outside withholding may need to make quarterly estimated payments. The requirement applies when your Arizona gross income tops $75,000 ($150,000 joint) and did so in the prior year too. Payments follow the federal quarterly schedule. If your total Arizona tax after withholding and credits is under $1,000, there’s no estimated payment penalty.7Arizona Legislature. Arizona Revised Statutes Title 43 – 581 – Payment of Estimated Tax
Deadline, Extension, and Penalties
The filing deadline is April 15. File electronically through AZTaxes.gov or commercial software, or on paper if you don’t mind waiting longer for processing.
Need more time? Arizona Form 204 gives you an automatic six-month extension to October 15. File it by April 15. An extension to file is not an extension to pay. You still need to pay at least 90% of what you owe by April 15 to avoid penalties.
Miss the deadline and Arizona charges two separate penalties that stack:
- Late filing: 4.5% of unpaid tax per month or partial month, up to 25%.
- Late payment: 0.5% of unpaid tax per month.
Interest runs on top of both.8Arizona Department of Revenue. Filing Notices of Penalties and Interest Three months late on both filing and paying works out to 15% in combined penalties plus interest. The late filing penalty is nine times the late payment penalty, so if you can’t pay in full, file anyway and pay what you can. That alone cuts your exposure dramatically.
No City or County Income Tax
Arizona cities and counties don’t levy their own income tax on wages or investment income. The local tax you’ll see is the Transaction Privilege Tax, which functions like a sales tax and falls on businesses, not on your paycheck. The state return is your only individual income tax obligation in Arizona.