Does Arizona Have State Income Tax? Yes — Here's the 2026 Rate
Arizona has a state income tax, and it's a flat 2.5% on taxable income for every filer, regardless of how much you earn. That single number is easy to state but frequently misunderstood, since Arizona wasn't always flat, isn't the whole tax picture, and works differently for residents, part-year residents, and nonresidents. Here's exactly who pays it, what's exempt, and where Arizona lands compared to the rest of the country.
Key Takeaways
- Arizona's individual income tax rate is a flat 2.5% on Arizona taxable income for tax year 2026, the same rate that has applied since tax year 2023.
- Arizona residents are taxed on income from all sources; nonresidents and part-year residents are taxed only on Arizona-source income, prorated accordingly.
- Social Security benefits are fully exempt from Arizona income tax, and military retirement pay is 100% exempt as well.
- Arizona's corporate income tax rate is 4.9%, separate from the individual rate that applies to sole proprietors, partnerships, and S-corp owners.
- The flat rate only exists because a 2021 revenue-trigger law fully phased in by 2023; legislative proposals to adjust it further come up periodically, so it's worth verifying the current-year rate before filing.
- Arizona has no local or city income tax, unlike states such as Ohio or Pennsylvania where cities can impose their own.
Yes, Arizona has an income tax, here's what changed
Arizona levies an individual income tax under A.R.S. § 43-1011, and it isn't new. What changed is the structure: before 2023, Arizona used a graduated system with rates ranging from 2.59% to 4.5% depending on income. A 2021 law directed the Arizona Department of Revenue to move to a single 2.5% rate once state General Fund revenue hit a specified growth threshold. That threshold was met, and per JLBC's own fiscal summary, "the individual income tax rate for TY 2023 and each year thereafter is 2.5 percent." The flat rate has held for tax year 2026, confirmed on ADOR's individual income tax highlights page.
Who actually pays it, and on what income
Arizona taxes differently depending on your residency status:
- Full-year residents are taxed on their entire taxable income, regardless of where it was earned.
- Nonresidents are taxed only on income sourced to Arizona, such as wages for work physically performed in the state, Arizona rental income, or income from an Arizona-based business.
- Part-year residents split the year, reporting income earned during their Arizona residency period in full, plus any Arizona-source income earned during the nonresident portion of the year.
The starting point for all three is your federal adjusted gross income, per ADOR's individuals page, which then gets adjusted by Arizona-specific additions and subtractions before the 2.5% rate applies.
What's exempt from Arizona income tax
A few categories of income escape Arizona tax entirely, regardless of how much you receive:
- Social Security benefits, fully exempt at the state level (federal taxation of Social Security still applies separately).
- Military retirement pay, 100% exempt.
- Interest on U.S. government obligations.
- Up to $2,500 of certain federal, state, or Arizona government pensions.
None of these exemptions require special forms beyond the standard subtraction lines on your Arizona return, but they're commonly missed by taxpayers who assume Arizona simply mirrors the federal return line for line.
How Arizona compares to other states
Arizona's 2.5% flat rate ties North Dakota for the lowest top marginal rate among the 41 states that levy a broad-based individual income tax. Nine states, Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming, have no state income tax at all. Tax Foundation's Arizona profile tracks how Arizona's rate and overall tax burden stack up against neighboring states each year, useful context if you're comparing Arizona to a no-income-tax state like Texas or Nevada, or a high-tax state like California, which taxes income progressively up to 13.3%.
Worth being precise here: comparing state income tax rates alone doesn't capture the full picture. A state with no income tax often makes up the difference through higher property or sales tax, so the comparison that matters is total tax burden, not a single rate in isolation.
Business and corporate income tax in Arizona
The 2.5% rate applies to individual filers, including sole proprietors, partners, and S-corp shareholders reporting business income on their personal returns. C-corporations pay a separate corporate income tax rate of 4.9% on Arizona taxable income, with a $50 minimum tax. Deciding between entity structures? This distinction, individual pass-through taxation at 2.5% versus corporate taxation at 4.9% plus a second layer of tax on dividends, is one of the more consequential planning decisions a growing business makes.
Estimated payments and who needs to file
Arizona requires quarterly estimated payments from individuals whose Arizona gross income exceeds $75,000 (single or married filing separately) or $150,000 (married filing jointly) in both the current and prior year. Below those thresholds, most taxpayers satisfy their obligation through withholding, using Form A-4 to elect a flat withholding percentage from their paycheck. Self-employed individuals and business owners without wage withholding are the ones most likely to need estimated payments, and underpaying them triggers a penalty separate from any balance due on the return itself.
A note on rate changes and legislative activity
Arizona's flat rate has been the subject of ongoing legislative proposals, some tied to formulas that would reduce it further based on state revenue surpluses, and separate debates over how closely Arizona conforms to federal tax law changes each year. Arizona doesn't automatically adopt every federal tax code change; the legislature has to actively update the state's conformity statute, and that process has occasionally created timing gaps between when federal changes take effect and when Arizona formally recognizes them. None of this changes the core 2.5% rate discussed here, but filing close to a legislative session? Worth confirming current-year specifics on ADOR's site rather than assuming last year's rules carried over unchanged.
What this means for Arizona business owners and real estate investors
Deciding between an LLC taxed as a sole proprietorship, a partnership, or an S-corp election? The 2.5% flat individual rate is one input among several, alongside self-employment tax exposure and the S-corp reasonable compensation question. For real estate investors, Arizona's flat rate applies the same way to rental income reported on Schedule E as it does to wages, with no separate capital gains rate at the state level. Our Strategic Tax Advisory and Preparation team builds entity and income planning around Arizona's specific rate structure rather than treating it as an afterthought to federal planning, and our Payroll Services team makes sure your A-4 withholding election actually reflects the flat-rate math instead of a guess.
Getting your Arizona tax position right
Arizona's flat 2.5% rate is simple to state but easy to get wrong in the details, especially around residency sourcing, estimated payment thresholds, and the exemptions that don't automatically carry over from your federal return. Our Accounting & Business Performance team keeps this handled year-round rather than reconstructed each April. Weighing an entity structure change or planning around Arizona's rate? Book a free discovery call and we'll walk through what actually applies to your situation.
Frequently Asked Questions
Does Arizona have a state income tax?
Yes. Arizona levies a flat 2.5% individual income tax on Arizona taxable income for tax year 2026, one of the lowest flat rates among states with a broad-based income tax.
Is Arizona a flat tax or graduated tax state?
Flat. Arizona moved from a graduated system with rates up to 4.5% to a single 2.5% flat rate beginning with tax year 2023.
Do Arizona residents pay tax on income earned in other states?
Yes. Full-year Arizona residents are taxed on their entire income regardless of where it was earned, though a credit is generally available for taxes paid to another state to prevent double taxation.
Is Social Security taxed in Arizona?
No. Arizona fully exempts Social Security benefits from state income tax, though the benefits may still be partially taxable at the federal level.
What is Arizona's corporate income tax rate?
4.9% on Arizona taxable income, with a $50 minimum tax. This is separate from the 2.5% individual rate that applies to pass-through business income.
Does Arizona have local or city income tax?
No. Arizona does not permit cities or counties to levy their own income tax, unlike some states where local income taxes stack on top of the state rate.
