To file your Arizona state taxes, complete the Arizona individual income tax form that matches your residency, start from the federal adjusted gross income on your federal return, apply Arizona additions and subtractions, subtract the standard or itemized deduction, and pay 2.5% on what’s left. The return is due April 15, and the fastest way to submit it is electronically through AZTaxes.gov.1Arizona Department of Revenue. AZTaxes E-File Portal
Do You Have to File?
Two things decide this: your connection to Arizona and how much you earned. Full-year residents owe Arizona tax on all income no matter where it was earned. Part-year residents report only income earned while living in the state. Nonresidents file if they had Arizona-source income, such as wages for work done in the state or rent from Arizona property.
Filing becomes mandatory once your Arizona gross income crosses the threshold tied to your filing status. For tax year 2025 returns filed in 2026:
- Single or married filing separately: $15,750
- Head of household: $23,625
- Married filing jointly: $31,500
If your income falls below the threshold, you generally don’t have to file. You may still want to if Arizona tax was withheld from your paychecks and you’re owed a refund.2Arizona Department of Revenue. Individual Income Tax Information
Pick the Right Form
Arizona has a form for each kind of filer:
- Form 140 is the standard return for full-year residents who need to report deductions, credits, or adjustments.
- Form 140A is a shorter version for full-year residents with simpler returns.
- Form 140EZ is the most streamlined option, built for full-year residents with no dependents and limited adjustments.
- Form 140PY is for part-year residents and prorates income and deductions based on the time you lived in Arizona.
- Form 140NR is for nonresidents with Arizona-source income.
All versions are on the Department of Revenue website.3Arizona Department of Revenue. Form 140 – Resident Personal Income Tax Form
Start From Your Federal Return
Finish your federal return first. The Arizona form opens with your federal adjusted gross income, copied straight across. Everything else happens on top of that number.
Additions
Arizona requires certain additions that raise your taxable income above the federal baseline. The most common is interest from bonds issued by other states or their municipalities. California municipal bond interest, for example, is tax-free federally but taxable in Arizona.
Subtractions
Arizona also allows subtractions that reduce taxable income. The big one for retirees is Social Security: Arizona fully excludes Social Security benefits from state taxation, so if any amount was included in your federal AGI, you subtract all of it on your Arizona return.4Arizona Legislature. Arizona Revised Statutes Title 43-1022 – Subtractions From Arizona Gross Income Military retirement pay is fully exempt. Recipients of U.S. government civil service pensions can subtract up to $2,500 a year.
Standard Deduction
After additions and subtractions, choose between the Arizona standard deduction and itemizing. The standard deduction amounts for tax year 2025 are the same as the filing thresholds above: $15,750, $23,625, and $31,500. If your qualifying itemized deductions exceed those figures, itemize. Otherwise take the standard deduction.
Make sure your filing status, dependents, and Social Security numbers match your federal return. Mismatches between the two returns are one of the quickest ways to trigger a notice or a processing delay.
Apply the 2.5% Rate and Any Credits
Arizona taxes all taxable income at a flat 2.5%. Once you have your Arizona taxable income, multiply by 0.025 to find your tax before credits.5Arizona Joint Legislative Budget Committee. State of Arizona 2025 Tax Handbook
Credits then reduce that tax dollar-for-dollar, which makes them more valuable than deductions. Two that filers often miss involve charitable giving:
- Contributions to Qualifying Charitable Organizations (QCOs), which serve Arizona residents receiving temporary assistance, low-income residents, or people with chronic illnesses.
- Contributions to Qualifying Foster Care Charitable Organizations (QFCOs), which help children in Arizona’s foster care system.
The Department of Revenue publishes certified lists of eligible organizations for each.6Arizona Department of Revenue. Credits for Contributions to QCOs and QFCOs Arizona also offers credits for public school contributions, private school tuition organization donations, and military family relief fund contributions. Each has its own maximum and its own form, so read the specific instructions before claiming.
Submitting Your Return
File Online
The fastest route is AZTaxes.gov, which connects you to Department of Revenue-approved software vendors for preparing and submitting your return. You’ll apply a digital signature, and the system generates a submission receipt worth saving. Electronic returns move through processing much faster than paper, so e-filing is the clear choice if you’re expecting a refund.
File by Mail
If you’d rather mail a paper return, print the completed forms and assemble them in the order the form instructions specify. Arizona uses different processing addresses depending on whether your return includes a payment or claims a refund, so check the mailing instructions printed on the form. Send it certified or by a trackable method so you have proof of the mailing date.
Deadline, Extensions, and Payment
Arizona returns are due April 15, matching the federal deadline. When April 15 lands on a weekend or holiday, the deadline shifts to the next business day.
If you need more time, file Arizona Form 204 before the original due date for an automatic six-month extension. It applies to Forms 140, 140A, 140EZ, 140PY, 140NR, and several other return types.7Arizona Department of Revenue. Application for Filing Extension Form
An extension to file is not an extension to pay. If you owe, you still need to estimate the amount and pay by April 15. Penalties and interest start accruing on any unpaid balance after that date whether or not you filed Form 204. You can pay electronically through AZTaxes or mail a check with your return; electronic payments can be scheduled for a specific date.
After You File: Refunds and Penalties
Check refund status through the “Where’s My Refund” tool on AZTaxes using your Social Security number, your return zip code, and your filing status.8Arizona Department of Revenue. Check Refund Status Electronically filed returns typically process within eight to ten business days. Paper returns take considerably longer because they need manual data entry first. Errors or missing information add more delay while the Department of Revenue sends a notice and waits for your reply.
Late filing and late payment carry separate penalties, and they can stack. The late filing penalty is 4.5% of the unpaid tax for each month or partial month the return is overdue, capped at 25% of the tax due. The late payment penalty is 0.5% of the unpaid tax for each month or partial month the balance remains outstanding.9Arizona Department of Revenue. Filing Notices of Penalties and Interest Interest accrues on unpaid balances at the same rate the IRS charges on federal underpayments.
If you can’t pay in full, file anyway. The late filing penalty runs nine times larger than the late payment penalty, so getting the return in by the deadline saves money even if you have to arrange payment afterward.