Arizona tax filing: file AZ state taxes online, Form 140, flat 2.5% rate

Do you have to file an Arizona tax return?

A full-year Arizona resident generally must file a Form 140 for 2025 if their Arizona gross income is at least the standard deduction for their filing status. Because Arizona matches the federal standard deduction, those thresholds for 2025 are:

You should also file if Arizona tax was withheld from your pay and you want it refunded, even when your income is below the threshold. Residents file Form 140 (the short 140A or 140EZ works for simple returns); part-year residents file Form 140PY and nonresidents with Arizona-source income file Form 140NR. The current rules are published by the Arizona Department of Revenue, and the state tax filing pillar compares Arizona with the other states.

The flat rate, standard deduction and dependent credit

Arizona is a flat-tax state. For tax year 2025 it taxes all taxable income at 2.5 percent, the rate in place since 2023. There are no brackets and no high-earner surcharge: a proposed 3.5 percent surcharge on high incomes (Proposition 208) was struck down by the courts and never took lasting effect, and Arizona moved to the single 2.5 percent rate instead.

Arizona uses the same standard deduction as the federal return. For 2025 that is $15,750 single, $31,500 married filing jointly, and $23,625 head of household. If you take the standard deduction, Arizona lets you increase it by 34 percent of the charitable gifts you could have itemized on your federal return, a break most other states do not offer.

Arizona replaced personal and dependent exemptions with a dependent tax credit: $100 per dependent under age 17 and $25 per dependent age 17 or older. The credit reduces your tax dollar for dollar and phases out at higher incomes. Because Arizona conforms closely to federal figures, the state return usually flows straight from the federal one.

Retirement income and Social Security in Arizona

Arizona is relatively friendly to retirees. It does not tax Social Security benefits, which are fully subtracted from Arizona income. Military retirement pay is 100 percent exempt, with no cap, for 2021 and later years.

Arizona and United States government pensions, including federal civil-service and Arizona state and local government pensions, qualify for a subtraction of up to $2,500 per year. Private pensions, IRA distributions, and 401(k) withdrawals do not get a special exemption; they are taxed at the flat 2.5 percent after the standard deduction, like other income. Because the rate is low and flat, the arithmetic on retirement income is simple once the subtractions are applied.

Arizona tax filing deadline, extension and filing online

Arizona's deadline is April 15, 2026 for tax year 2025 returns, matching the federal date. Arizona grants an automatic six-month extension to October 15, 2026. If you have a valid federal extension (IRS Form 4868), Arizona honors it automatically and you do not file a separate state form. You file Arizona Form 204 only if you need a state-only extension or want to send an extension payment.

The extension gives you more time to file, not more time to pay. You must pay at least 90 percent of the tax you owe by April 15, 2026 to avoid an extension underpayment penalty, with the balance due by the extended date. Filing electronically is the practical default, and the Arizona return builds on your federal figures. TaxFile prepares both from one pass:

• Upload or talk. Drop in your W-2s and 1099s and it reads them, or describe your year and it asks what it needs.
• Federal and Arizona together. One set of documents produces both returns, with the flat 2.5 percent rate and the matching standard deduction applied.
• Credits checked. It applies the dependent tax credit, the charitable standard-deduction increase, and the Social Security subtraction where they fit.
• Error check, then you approve. Nothing is e-filed until you review and approve every line, through an authorized IRS e-file provider.

Pricing is $39 for a simple return, $89 self-employed, $199 business, plus $19 for each state return. There is no free tier. If your Arizona income comes from contract or freelance work, self-employed tax filing covers Schedule C and Schedule SE in more detail. TaxFile does not e-file federal extensions or prepare amended returns, and does not handle capital gains on Schedule D, rental income on Schedule E, or cryptocurrency. TaxFile is self-prepared tax software and does not provide personalized tax advice, and no refund amount is guaranteed.