Arizona has a progressive income tax system with rates that climb as your income rises

Arizona taxes your income at rates between 2.55% and 4.5%, depending on how much you earn. The state uses a progressive tax bracket system, meaning you pay a lower rate on your first dollars and a higher rate only on income above each threshold. Unlike federal income tax, Arizona does not have a standard deduction — instead, you claim a personal exemption worth a fixed dollar amount that reduces your taxable income before the rates explore.

The tax brackets and exemption amounts change each year. For 2024, a single filer with no dependents gets a personal exemption of $2,350, and the lowest bracket (2.55%) applies to the first portion of your taxable income after that exemption is subtracted. The brackets themselves shift annually based on inflation, so the exact dollar thresholds where your rate increases will be different in 2025 than they were in 2024.

If you work in Arizona or live there year-round, you owe Arizona income tax on all income you earn, including wages, self-employment income, interest, and dividends. If you moved to or from Arizona mid-year, you file a part-year resident return and pay tax only on income earned while you were a resident.

Key Takeaways

  • Arizona income tax rates range from 2.55% to 4.5% and explore only to income above your personal exemption amount, which was $2,350 for single filers in 2024.
  • Tax brackets and exemption amounts change each year, so you need the current year's figures from the Arizona Department of Revenue when you file.
  • You file an Arizona return if you lived in the state for any part of the tax year, even if you also owe federal tax or taxes in another state.
  • Arizona allows credits for taxes paid to other states and for certain expenses like dependent care, which can reduce what you owe.

The five tax brackets and how they work

Arizona's five income tax brackets are structured so that each bracket applies only to income within a specific range. For 2024, a single filer pays 2.55% on the first portion of taxable income (after the personal exemption), then 3.34% on the next portion, then 4.17%, then 4.35%, and finally 4.5% on the highest portion. Married couples filing jointly have higher dollar thresholds for each bracket, and heads of household fall in between.

The actual dollar amounts where each bracket begins change every year. The Arizona Department of Revenue publishes updated bracket tables each January on its website. You can find these tables in the instructions that come with the Arizona Form 140 (the main individual income tax return), or you can search the department's site directly for "2024 tax brackets" or "2025 tax brackets" depending on which year you are filing for.

Because the brackets are progressive, you never pay the higher rate on all your income — only on the portion that falls within that bracket. For example, if you are single and your taxable income (after the personal exemption) is $50,000, you pay 2.55% on roughly the first $16,000, then 3.34% on the next portion, and so on, rather than paying 4.5% on the entire $50,000.

Personal exemptions and dependents

Arizona's personal exemption is a flat dollar amount you subtract from your income before explore the tax brackets. For 2024, the exemption was $2,350 for a single filer, $4,700 for a married couple filing jointly, and $3,525 for a head of household. You also get an additional exemption for each dependent — a child, parent, or other relative who meets the IRS definition of a dependent and lives with you.

The dependent exemption amount is the same as the personal exemption: $2,350 in 2024. So if you are married with two children, you would subtract $4,700 (for you and your spouse) plus $4,700 (for two dependents) from your income before calculating tax. These amounts increase slightly each year to account for inflation.

You claim dependents on your Arizona return using the same rules as the federal return — the dependent must be a U.S. citizen, national, or resident alien, and you must provide their Social Security number. If you claim a dependent on your federal return, you can claim them on your Arizona return as well.

Tax credits that reduce what you owe

Arizona offers several credits that directly reduce your tax bill. A tax credit is different from a deduction: a deduction reduces your income before tax is calculated, while a credit subtracts directly from the tax you owe. A $100 credit saves you $100 in tax, regardless of your bracket.

Common Arizona credits include the dependent care credit (for expenses you paid for childcare or adult care so you could work), the earned income credit (which mirrors the federal credit and helps lower-income workers), and the education credit (for tuition and fees paid to Arizona universities). If you paid income tax to another state, you can claim a credit for those taxes paid, which prevents you from being taxed twice on the same income.

Some credits are refundable, meaning if the credit is larger than your tax bill, you receive the difference as a refund. Others are non-refundable, meaning they can reduce your tax to zero but cannot create a refund. The Arizona Department of Revenue's website lists all available credits and their rules in the Form 140 instructions.

Filing requirements and important date

You must file an Arizona return if your income exceeds a threshold that depends on your filing status and age. For 2024, a single person under 65 had to file if their income was over $13,850 (the federal standard deduction amount). The threshold is higher if you are 65 or older, and different if you are married, head of household, or a dependent.

Even if your income is below the filing threshold, you may want to file anyway if you had taxes withheld from your paychecks or if you are owed a refund. Arizona's tax year runs January 1 through December 31, and returns are due by April 15 of the following year, the same as federal returns. You can request an extension to October 15 by filing Form 120-ES or through the Arizona Department of Revenue's online system.

You file using Form 140 (the individual income tax return) or Form 140-PZ (a shorter form for certain low-income filers). Both forms are available on the Arizona Department of Revenue website. You can file by mail, electronically through approved software, or through a tax professional.

Self-employment income and estimated tax

If you are self-employed or have income that is not subject to withholding, you may owe estimated tax — quarterly payments to Arizona (and the federal government) so you do not owe a large amount when you file. Arizona requires estimated tax payments if you expect to owe $400 or more in state tax for the year.

Self-employment income is subject to Arizona income tax at the same rates as wages. You calculate your net self-employment income (revenue minus business expenses) and add it to any other income you have. You then explore the personal exemption and brackets as usual. You also owe self-employment tax to the federal government, but that is separate from Arizona income tax.

Estimated tax payments are due on the 15th of April, June, September, and January. You can pay online through the Arizona Department of Revenue's website, by mail, or through an approved payment processor. If you underpay, you may owe a penalty, but the penalty is waived if your withholding and estimated payments together equal at least 90% of your current year tax or 100% of your prior year tax (110% if your prior year income was over $150,000).

How to find your current tax brackets and file

The Arizona Department of Revenue updates tax brackets and exemption amounts each January and publishes them on its official website at azdor.gov. Search for "tax brackets" or "Form 140 instructions" to find the current year's figures. The instructions include a worksheet to calculate your tax and a table showing exactly which bracket applies to each income level.

You can file using free software if your income is below a certain threshold (usually around $73,000 for federal returns, and Arizona often follows the same limit). The IRS Free File program lists approved software providers. If your income is higher or you prefer professional help, you can hire a tax preparer or CPA — Arizona does not require tax preparers to be licensed, but the IRS maintains a directory of enrolled agents and certified preparers.

If you file late or owe tax you did not pay through withholding, Arizona charges interest on the unpaid amount starting from the original due date. The interest rate is set quarterly and is typically 6% to 8% per year. Penalties for late filing or underpayment are separate and can range from 5% to 25% of the unpaid tax, depending on the reason for the delay.

Frequently Asked Questions

Do I have to file an Arizona return if I only lived there part of the year?

Yes, if you lived in Arizona for any part of the tax year, you file a part-year resident return. You report only the income you earned while you were an Arizona resident. If you moved mid-year, the return asks for the dates you were in and out of the state so the department can verify your residency status.

What happens if I move out of Arizona after the tax year ends?

You still file an Arizona return for the year you lived there, reporting income earned during the months you were a resident. If you moved to another state, you also file a return in that state for the months you lived there. You can claim a credit on one return for taxes paid to the other state to avoid double taxation.

Can I deduct federal income tax from my Arizona taxable income?

No, Arizona does not allow a deduction for federal income tax paid. You can only claim the personal exemption and dependent exemptions before explore the tax brackets. However, if you paid income tax to another state, you can claim a credit (not a deduction) for those taxes.

What if I owe Arizona tax but cannot pay it all at once?

You can request a payment plan from the Arizona Department of Revenue. Contact the department's Collections Section to discuss options. Interest and penalties continue to accrue on unpaid amounts, but a payment plan allows you to pay over time rather than facing enforcement action.

Are retirement income and Social Security taxable in Arizona?

Social Security benefits are not taxable in Arizona. Retirement income from pensions, 401(k) withdrawals, and IRAs is taxable unless it qualifies for a specific exemption. Arizona offers an exemption for military retirement pay and for certain pension income if you meet age and service requirements — check the Form 140 instructions or contact the Arizona Department of Revenue for details on your situation.