Arizona offers one of the most generous systems of individual tax credits in the country. Unlike a deduction (which only lowers your taxable income), an Arizona tax credit provides a dollar-for-dollar reduction of your state income tax liability. That means every dollar you contribute to a qualifying organization directly reduces the amount you owe to the state. For tax year 2025, a married couple filing jointly can redirect over $6,000 in state tax dollars to causes they care about, from foster care charities and public school programs to private school tuition scholarships and military family support.

Because Arizona's flat 2.5% individual income tax rate keeps state liability relatively low, these credits can often eliminate your entire Arizona tax bill. Below is a complete guide to the five Arizona tax credits available to individual taxpayers, including current limits, qualifying organizations, forms, deadlines, and planning strategies for 2025 and 2026.

How Arizona Tax Credits Work

Each Arizona charitable tax credit is nonrefundable, meaning it can reduce your state tax to zero but will not generate a refund beyond what you owe. However, most of these credits carry a five-year carryforward, so unused amounts are not lost. You claim the credit on the specific Arizona form for each category and attach Arizona Form 301 (Nonrefundable Individual Tax Credits and Recapture) to your return.

A few rules apply across all Arizona tax credit donations:

  • Cash contributions only. Non-cash property donations do not qualify for these credits.
  • No double benefit on your Arizona return. You cannot claim the same donation as both an Arizona tax credit and an Arizona charitable deduction. However, donations claimed as Arizona credits may still be deductible on your federal return if you itemize (subject to federal rules).
  • April 15 prior-year election. Arizona law allows donations made from January 1 through April 15 of the following year to be claimed on the prior tax year's return at that year's maximum. For example, a QCO donation made on March 1, 2026 can be claimed on your 2025 Arizona return (at the 2025 cap) or held for your 2026 return (at the 2026 cap). You cannot claim the same donation on both years.

Qualifying Charitable Organization (QCO) Credit

The QCO credit rewards cash contributions to organizations that provide basic necessities to Arizona residents who receive Temporary Assistance for Needy Families (TANF) benefits, are low-income, or have a chronic illness or physical disability. The credit is claimed on Arizona Form 321.

Maximum credit amounts:

  • Tax year 2025: $495 single, head of household, or married filing separately; $987 married filing jointly
  • Tax year 2026: $506 single, head of household, or married filing separately; $1,009 married filing jointly

These limits are indexed annually for inflation. Each qualifying charitable organization has a five-digit QCO code that must appear on Form 321. The Arizona Department of Revenue publishes an updated list of certified QCOs. Always verify an organization's current status before donating, as the list changes during the year.

Unused QCO credit may be carried forward for up to five consecutive tax years.

Qualifying Foster Care Charitable Organization (QFCO) Credit

The QFCO credit is a separate credit for contributions to organizations that serve foster care children specifically. To qualify, the organization must provide basic needs to at least 200 qualifying individuals in the foster care system. This credit is claimed on Arizona Form 352.

Maximum credit amounts:

  • Tax year 2025: $618 single, head of household, or married filing separately; $1,234 married filing jointly
  • Tax year 2026: $632 single, head of household, or married filing separately; $1,262 married filing jointly

Like the QCO credit, QFCO limits are indexed for inflation, each certified QFCO has a unique code, and unused credits carry forward for five years. The ADOR QFCO list is the definitive source for eligible organizations.

Private School Tuition Organization (STO) Credits

Arizona provides two separate credits for cash contributions to certified School Tuition Organizations (STOs), which are nonprofits that use contributions to award scholarships or grants to students attending qualified private schools in Arizona.

Original STO Credit (Form 323)

The original private school tuition tax credit, established under A.R.S. Section 43-1089, allows individual taxpayers to claim a credit for contributions to a certified STO. For tax year 2025, the maximum credit is $769 for single filers or heads of household and $1,535 for married couples filing jointly. These amounts are indexed annually. The credit is claimed on Arizona Form 323.

PLUS (Switcher) STO Credit (Form 348)

The PLUS credit (sometimes called the "Switcher" or "overflow" credit) provides an additional credit beyond the Form 323 limits. To claim this credit, you must first contribute the maximum amount on Form 323. The excess is then claimed on Arizona Form 348 under A.R.S. Section 43-1089.03.

For tax year 2025, the maximum PLUS credit is $766 for single filers or heads of household and $1,527 for married couples filing jointly. This brings the combined STO credit maximum to $1,535 single / $3,062 MFJ for tax year 2025.

PLUS credit eligibility is more specific than the original STO credit. Eligible scholarship recipients generally include kindergartners, newly enrolled students, former Empowerment Scholarship Account (ESA) recipients, military dependents, and certain other student categories. Both STO credits carry a five-year carryforward.

Public School Tax Credit

Arizona taxpayers who contribute cash or pay fees to an Arizona public school for eligible extracurricular activities or character education programs can claim a credit on Arizona Form 322. Unlike the other credits discussed here, the public school tax credit limits are not indexed for inflation.

Maximum credit amounts (all tax years):

  • $200 for single, head of household, or married filing separately
  • $400 for married filing jointly

To claim this credit, you need the school's nine-digit CTDS (County, Type, District, and Site) number, which is reported on Form 322. Eligible activities include sports, arts, music, field trips, and other extracurricular programs. The Arizona Department of Revenue public school credit page has complete details on qualifying activities.

Military Family Relief Fund Credit

Arizona also allows a credit for cash donations to the Military Family Relief Fund, administered by the Arizona Department of Veterans' Services (ADVS). The credit is claimed on Arizona Form 340 and was extended through tax year 2026.

Maximum credit amounts:

  • $200 for single, head of household, or married filing separately
  • $400 for married filing jointly

Unlike the other Arizona tax credits, the Military Family Relief Fund credit has no carryforward. You must use it in the tax year you make the donation. There is also an annual statewide cap of $1,000,000 in total donations that qualify for the credit, allocated on a first-come, first-served basis. You must receive a receipt from ADVS confirming your donation qualifies before claiming the credit.

Total Credit Potential for 2025 (Married Filing Jointly)

When you combine all five categories, the maximum Arizona tax credit for a married couple filing jointly for tax year 2025 is:

  • QCO (Form 321): $987
  • QFCO (Form 352): $1,234
  • STO Original (Form 323): $1,535
  • STO PLUS (Form 348): $1,527
  • Public School (Form 322): $400
  • Military Family Relief Fund (Form 340): $400
  • Total: $6,083

For single filers, the combined maximum is $2,848. These figures increase slightly for tax year 2026 as the indexed credits adjust.

Interaction with Federal Tax Rules

A common question is whether Arizona tax credit donations also provide a federal tax benefit. The answer depends on your federal filing situation:

  • Federal itemizers: Charitable contributions (including those claimed as Arizona tax credits) generally remain deductible as an itemized deduction on your federal return under IRS Topic 506. The One Big Beautiful Bill Act (OBBBA), signed in July 2025, introduced a 0.5% of AGI floor on charitable deductions starting in tax year 2026, so very small donations may lose their federal deduction value.
  • Federal standard deduction filers: Starting in tax year 2026, OBBBA restored a limited non-itemizer charitable deduction of up to $1,000 for single filers ($2,000 married filing jointly).

Either way, the Arizona credit itself is the primary benefit. Even if you receive no federal deduction, you are effectively redirecting money that would have gone to the state general fund toward a specific cause you support.

How to Choose Qualifying Organizations

Not every charity in Arizona qualifies for these credits. Only organizations certified by the Arizona Department of Revenue as a QCO, QFCO, or STO are eligible. The ADOR publishes updated lists (in Excel and PDF format) that you should check before making your contribution.

Common categories of qualifying organizations include:

  • Food banks and homeless shelters (QCO)
  • Domestic violence shelters and crisis centers (QCO)
  • Foster care support organizations (QFCO)
  • Private school scholarship funds (STO)
  • Youth development and after-school programs (QCO)

Note that churches and houses of worship are generally not eligible for the QCO credit on their own. However, many faith-based organizations that operate social services meeting the QCO requirements do qualify. Similarly, many STOs are affiliated with religious private schools and are eligible for the tuition credits.

Frequently Asked Questions

Can I claim Arizona tax credits if I do not owe state income tax?

The credits are nonrefundable, so you cannot receive a refund beyond your tax liability. However, most credits carry a five-year carryforward, meaning you can apply unused credits to future years when you do have a tax balance.

Do I have to donate to all categories to claim the credits?

No. You can contribute to one or more categories. To maximize your total credit, you would contribute to each category up to its limit, but there is no requirement to split donations across all categories.

Can I make my donation after December 31 and still claim it on this year's return?

Yes. Arizona allows donations made from January 1 through April 15 of the following year to be claimed on the prior year's return. For example, a donation made in February 2026 can be claimed on your 2025 tax return (at the 2025 maximum) or saved for your 2026 return.

Are these credits available to businesses?

The credits discussed in this article are for individual taxpayers only. Corporations and partnerships cannot claim these credits or pass them through to shareholders or partners. Arizona does offer separate corporate tax credits for businesses.

What forms do I need to file?

You will need the specific credit form for each category (Form 321, 322, 323, 340, 348, or 352) plus Arizona Form 301, which summarizes all nonrefundable credits. These forms are attached to your Arizona income tax return (Form 140, 140PY, or 140NR).

How K&R Taxes Can Help

Navigating five different credit categories, each with its own form, limit, and qualifying organization list, takes careful planning. At K&R Taxes, we help Arizona taxpayers identify the right mix of credits to maximize their impact and minimize their state tax liability. Whether you want to support foster care children, fund a local school, or contribute to a scholarship program, our tax advisory team can walk you through the process.

We also coordinate your Arizona tax credit strategy with your federal tax planning so you understand the full picture, including how your donations interact with itemized deductions, the standard deduction, and the new non-itemizer charitable deduction for 2026.

Ready to put your tax dollars to work for causes you believe in? Contact K&R Taxes to schedule a consultation, or visit our accounting services page to learn more about how we support individuals and small businesses across Arizona.