Yes, Arizona does have a state income tax. It is a flat 2.5% on Arizona taxable income, and that same rate applies to every filer regardless of how much they earn or how they file.1Arizona Department of Revenue. Individual Income Tax Highlights Residents owe tax on all their income; non-residents owe only on income from Arizona sources.
What the 2.5% Actually Applies To
The 2.5% does not hit your gross pay. You start with your federal adjusted gross income, apply Arizona-specific additions and subtractions, then subtract either the standard deduction or your itemized deductions. The rate applies to what’s left, so the effective rate on your total earnings is almost always lower than 2.5%.
Arizona’s standard deduction matches the federal amounts for most filers: $15,750 for single or married filing separately, $31,500 for married filing jointly, and $23,625 for head of household. You can itemize on your Arizona return even if you took the standard deduction federally, which is worth checking if you had significant deductible expenses. Arizona also lets non-itemizers add a percentage of their qualifying charitable contributions on top of the standard deduction.1Arizona Department of Revenue. Individual Income Tax Highlights
Who Has to File in Arizona
You must file an Arizona return if your gross income exceeds the standard deduction for your filing status: $15,750 single, $31,500 joint, or $23,625 head of household. Below those numbers, you generally do not owe Arizona income tax and are not required to file.1Arizona Department of Revenue. Individual Income Tax Highlights
Full-year residents file Form 140 and pay Arizona tax on income from anywhere. If you moved into or out of the state during the year, you file Form 140PY as a part-year resident. Non-residents who earned money from Arizona sources, including wages for work done in the state, business income generated here, or gains from selling Arizona real estate, file Form 140NR and owe tax only on that Arizona-sourced income.2Arizona Department of Revenue. 2025 Arizona Form 140 Instructions
Retirement, Social Security, and Military Income
Social Security benefits are not taxed in Arizona. If any portion of your Social Security was included in your federal adjusted gross income, you subtract the full amount when figuring your Arizona taxable income.3Arizona Legislature. Arizona Revised Statutes Title 43 – 1022 – Subtractions From Arizona Gross Income
Pensions get a narrower break. Arizona lets you subtract up to $2,500 in benefits from federal government retirement systems and certain Arizona public employee retirement plans. Anything above $2,500 from those sources, and all distributions from private 401(k) or IRA accounts, are fully taxable at 2.5%.3Arizona Legislature. Arizona Revised Statutes Title 43 – 1022 – Subtractions From Arizona Gross Income
Active-duty military pay is treated favorably. Service members whose only income is military pay generally do not need to file an Arizona return, as long as no Arizona tax was withheld. If withholding did happen, filing is the only way to get the money back.4Arizona Department of Revenue. Military Tax Filing Military retirees get a full subtraction: retired or retainer pay from the uniformed services is not taxed by Arizona at all.3Arizona Legislature. Arizona Revised Statutes Title 43 – 1022 – Subtractions From Arizona Gross Income
Credits That Reduce What You Owe
A credit cuts your tax bill dollar for dollar, so these are worth more than a deduction of the same size. Arizona offers $100 for each dependent under 17 and $25 for each dependent 17 or older. The credit starts phasing out at $200,000 of federal AGI for single filers and $400,000 for joint filers.5Arizona Department of Revenue. 2025 Arizona Form 140ET Instructions
Lower-income households can also claim the Family Income Tax Credit, worth $40 per family member, counting up to two parents and four children. That caps at $240 for a joint or head of household return and $120 for a single filer without dependents.
Arizona is unusually generous with credits for donations to qualifying charitable organizations, foster care charities, and public schools. For 2026, the maximum credit for donations to qualifying charitable organizations is $506 for single filers and $1,009 for joint filers.6Arizona Department of Revenue. Credits for Contributions to QCOs and QFCOs These credits are non-refundable, so they can wipe out what you owe but will not produce a refund on their own.
How the Tax Gets Paid
If you work for an employer, Arizona handles withholding differently from most states. You pick a flat percentage on Arizona Form A-4 when you start a job. If you don’t submit one, your employer withholds at a default rate. Because the tax rate is only 2.5%, picking a withholding percentage that’s close to your actual liability matters: too high and you wait for a refund, too low and you owe in April.
Self-employed people and those with significant income outside of withholding may need to make quarterly estimated payments. The requirement applies once your Arizona gross income exceeds $75,000 ($150,000 for joint filers) and also exceeded that threshold in the prior year. Payments follow the federal quarterly schedule. No estimated payment penalty applies if your total Arizona tax after withholding and credits is under $1,000.7Arizona Legislature. Arizona Revised Statutes Title 43 – 581 – Payment of Estimated Tax
Deadline, Extension, and Late Penalties
Calendar-year returns are due April 15. You can file electronically through AZTaxes.gov or through commercial tax software, and paper returns are still accepted. Arizona Form 204 grants an automatic six-month extension to October 15 if you file the request by April 15. That’s an extension to file, not an extension to pay. You still need to pay at least 90% of what you owe by April 15 to avoid penalties.
Missing the deadline triggers two separate penalties that stack:
- Late filing: 4.5% of the unpaid tax per month or partial month, capped at 25%.
- Late payment: 0.5% of the unpaid tax per month.
Interest runs on top of both.8Arizona Department of Revenue. Filing Notices of Penalties and Interest If you can’t pay in full, file anyway. The late filing penalty is nine times the late payment penalty, so getting the return in on time cuts your exposure sharply even if you send the check later.
No Local Income Tax
Arizona cities and counties do not levy their own income taxes on wages or investment earnings. You will run into the Transaction Privilege Tax, Arizona’s version of a sales tax, when you shop, but it is not an income tax. The state return is your only individual income tax filing obligation in Arizona.