Arizona taxes your income at rates between 2.55% and 4.5%, depending on how much you earn

Arizona has a progressive income tax system, meaning the tax rate increases as your income increases. You do not pay one flat rate on all your earnings. Instead, your income is divided into brackets, and each bracket is taxed at its own rate. For 2024, Arizona's tax brackets range from 2.55% on the lowest earnings to 4.5% on the highest. The exact dollar amounts where each bracket begins change yearly based on inflation.

Arizona taxes both wages from employment and other income sources: self-employment earnings, investment income, rental income, and retirement distributions. If you live in Arizona on December 31, you owe tax on all income you earned during that year, regardless of where the money came from. If you moved to Arizona partway through the year, you owe tax only on income earned after you became a resident.

You file Arizona income tax using Form 140 (the standard return) or Form 140-NR (if you are a nonresident). These forms go to the Arizona Department of Revenue. Most people file both their federal return and their Arizona return at the same time, though the deadlines are the same: April 15 of the following year, unless you request an extension.

Key Takeaways

  • Arizona's income tax rates run from 2.55% to 4.5% depending on your income level, and the dollar amounts for each bracket shift each year.
  • You pay tax on wages, self-employment income, investment gains, rental income, and retirement distributions if you are an Arizona resident on December 31.
  • Arizona residents file Form 140; nonresidents file Form 140-NR; both are due April 15 unless you request an extension.
  • Arizona allows a standard deduction (the amount you can earn tax-free) that varies by filing status and age, and you can claim either the standard deduction or itemize deductions.
  • The state offers tax credits for things like dependent children, education expenses, and property taxes, which reduce your tax bill dollar-for-dollar rather than reducing your taxable income.

How the tax brackets work and what you actually owe

The brackets are the most misunderstood part of income tax. If you earn $100,000 and the top bracket is 4.5%, you do not owe 4.5% on all $100,000. Instead, the first portion of your income is taxed at 2.55%, the next portion at a higher rate, and so on, until your last dollars are taxed at 4.5%. Only the income that falls into the highest bracket gets the highest rate.

Arizona publishes the exact bracket thresholds each January. For example, in 2024, a single filer's brackets began at $0 (2.55%), then moved to a higher rate at around $16,000, then higher again at around $32,000, and so on. Married couples filing jointly have higher thresholds at each bracket. The Department of Revenue updates these numbers annually on its website, and tax software automatically uses the current year's brackets when you enter your income.

Your taxable income is what you actually owe tax on, and it is lower than your total income because of deductions. Arizona allows you to take either the standard deduction (a flat amount based on your filing status and age) or to itemize deductions (add up specific expenses like mortgage interest and property taxes). Most people take the standard deduction because it is simpler and often larger. After you subtract your deduction from your total income, you apply the tax brackets to what remains.

Standard deduction amounts and who gets a larger one

The standard deduction is the amount of income you can earn without owing any tax on it. Arizona's standard deduction varies by filing status and age. A single filer under 65 gets one amount; a single filer 65 or older gets a higher amount. Married couples filing jointly get a higher deduction than single filers, and married couples where at least one spouse is 65 get an even higher one. Head of household filers (usually single parents) have their own bracket.

These amounts change yearly. The Arizona Department of Revenue publishes the current year's standard deduction amounts in January. You can find them on the department's website or in the instructions that come with Form 140. If you are unsure which filing status applies to you, the IRS website has a clear guide, and the same filing status you use for federal tax usually applies to Arizona as well.

If your total income is less than your standard deduction, you owe no Arizona income tax. For example, if you are single and under 65, and your standard deduction is $14,800, and you earned $12,000 that year, you owe nothing. You may still want to file a return if you had taxes withheld from paychecks, because filing lets you get a refund of the overpayment.

Tax credits that reduce what you owe dollar-for-dollar

A tax credit is different from a deduction. A deduction reduces your taxable income; a credit reduces your actual tax bill. If you owe $1,000 in tax and you have a $200 credit, you owe $800. Credits are more valuable than deductions because they cut your bill directly.

Arizona offers several credits. The dependent exemption credit gives you a credit for each dependent child or other may have access to dependent. The amount varies by year and by your income level. The education credits cover tuition and fees paid to Arizona universities or community colleges, or student loan interest paid during the year. The property tax credit is available to renters and homeowners with lower incomes; it reduces your tax based on the property taxes or rent you paid. Arizona also offers credits for adoption expenses, foster care, and other specific situations.

To claim a credit, you list it on your Form 140 return. You must have documentation: for the dependent credit, your dependent's Social Security number; for education credits, tuition statements or loan documents; for the property tax credit, proof of rent or property tax paid. The Department of Revenue publishes a full list of available credits and the income limits for each one on its website.

What counts as income and what does not

Wages from a job are income. So are tips, bonuses, and commissions. If you are self-employed, your net business income (revenue minus business expenses) is taxable. Interest from savings accounts and bonds is income. Dividends from stocks are income. Capital gains (profit when you sell an investment) are income. Rental income is income. Retirement distributions from IRAs and 401(k)s are income. Social Security benefits may be partially taxable depending on your total income.

Some things are not taxable in Arizona. Gifts are not income. Inheritances are not income. Life insurance proceeds are not income. The return of your own principal (money you already paid in) is not income—only the earnings on it are. Certain retirement accounts, like Roth IRAs, may allow you to withdraw money tax-free if you meet the rules. Disability benefits from Social Security (SSDI) are not taxable. Workers' compensation is not taxable.

If you are unsure whether something counts as income, the Arizona Department of Revenue publishes guidance on its website, and you can also call their taxpayer assistance line. Your tax software will usually prompt you for the major income categories, so you do not have to guess.

Filing status and residency rules

Your filing status determines your tax brackets and standard deduction. The main statuses are single, married filing jointly, married filing separately, head of household, and may have access to widow(er). You must be married on December 31 to file as married for that year. If you divorce on December 31, you are considered unmarried for the whole year. Head of household status is usually available to unmarried people who pay more than half the household expenses for themselves and a dependent.

Residency matters because Arizona only taxes residents on all their income. If you are a nonresident, Arizona taxes you only on income you earned within the state. A resident is someone who lives in Arizona and intends to stay, or who has lived there for more than 183 days in the tax year. If you moved to Arizona partway through the year, you may be a part-year resident, and you file Form 140-NR-PT. Part-year residents owe tax on income earned after they became residents and on income from Arizona sources earned before they moved.

Military members stationed in Arizona are treated as nonresidents for tax purposes, even if their family lives there. This is a federal rule that Arizona follows. If you are military, you may have special filing rules, and you should contact the Arizona Department of Revenue or a tax professional familiar with military tax law.

How to file and where to send your return

You can file your Arizona return by mail or electronically. Most people file electronically because it is faster and you get a confirmation that the Department of Revenue received it. You can e-file through tax software (TurboTax, H&R Block, and others support Arizona returns), through a tax professional, or through the IRS Free File program if your income is below a certain threshold.

If you file by mail, send Form 140 (or Form 140-NR if you are a nonresident) to the Arizona Department of Revenue at the address listed in the form instructions. Include all required schedules and attachments. The postmark date is the filing date, so mail it by April 15 (or your extension deadline if you requested one).

You can request an automatic extension to file by October 15 by submitting Form 204 by April 15. An extension gives you more time to file, but it does not extend the time to pay. If you owe tax, you should pay as much as you can by April 15 to avoid penalties and interest on the unpaid amount.

Frequently Asked Questions

Do I have to file an Arizona return if I already filed a federal return?

Not necessarily. If your income is below Arizona's standard deduction for your filing status, you do not have to file. However, if you had taxes withheld from paychecks or made estimated tax payments, you should file to get a refund of the overpayment.

What happens if I do not file or pay on time?

The Arizona Department of Revenue charges penalties and interest. The failure-to-file penalty is usually 5% of the unpaid tax per month, up to 25%. The failure-to-pay penalty is 0.5% per month. Interest accrues daily at a rate set by the state. If you cannot pay by April 15, file anyway and pay what you can; filing on time reduces penalties even if you cannot pay in full.

Can I claim dependents on my Arizona return if I claim them on my federal return?

Yes. Arizona follows the federal rules for who qualifies as a dependent. If someone is your dependent for federal tax purposes, you can claim them on your Arizona return as well. You need their Social Security number and proof of relationship.

Is retirement income taxed differently in Arizona?

Distributions from traditional IRAs and 401(k)s are taxed as ordinary income. Roth IRA distributions may be tax-free if you meet the rules. Social Security benefits are taxable only if your total income exceeds a certain threshold. Pension income is taxed as ordinary income. Arizona does not have a special exclusion for retirement income like some states do.

What if I moved out of Arizona partway through the year?

You are a part-year resident. File Form 140-NR-PT and report only the income you earned while you were an Arizona resident, plus any income from Arizona sources earned after you left. You may also be able to claim the standard deduction and credits on a prorated basis. Contact the Arizona Department of Revenue if you are unsure how to report your situation.