Arizona Form 321 is the worksheet you use to claim the nonrefundable state income tax credit for cash gifts to certified Qualifying Charitable Organizations (QCOs). You list each donation in Part 1, add any unused credit from prior years in Part 2, total everything in Part 3, then carry the result to Arizona Form 301 and attach both forms to your state income tax return. For tax year 2025, the credit tops out at $495 for single, head of household, or married filing separately returns, and $987 for married couples filing jointly.
Who Can Claim the Credit
Full-year residents, part-year residents, and nonresidents who file an Arizona individual income tax return can all use Form 321. Corporations and other business entities cannot.
The donation itself has to meet two tests. First, it must be cash — checks and credit card payments qualify, but donated goods, clothing, vehicles, and volunteer hours do not. Second, the recipient must be on the Arizona Department of Revenue’s (ADOR) current list of certified QCOs. A 501(c)(3) status alone is not enough; the organization has to be certified by ADOR, which requires it to spend at least half its budget serving Arizona residents who receive TANF benefits, live below 150 percent of the federal poverty level, or have a chronic illness or physical disability. You also cannot claim the credit for a gift to an organization you control or hold a financial interest in.
What to Gather Before You Start
For every QCO donation you made during the tax year, pull together:
- The five-digit QCO code ADOR assigns to the organization
- The organization’s full name exactly as it appears on the ADOR list
- The date of each contribution in MM/DD/YYYY format
- The exact dollar amount of each contribution
ADOR publishes an updated QCO list each calendar year with the code and address for every certified organization. Use the list that matches the tax year you are filing for. Keep your receipts, canceled checks, or written acknowledgments from the charity with your tax records. For any single gift of $250 or more, IRS rules require a contemporaneous written acknowledgment from the organization stating the amount and whether you got anything in return.
Filling Out Part 1: Current Year’s Credit
Part 1 has two sections, and both use the same four-column layout: date in column (a), QCO code in column (b), charity name in column (c), dollar amount in column (d).
Section A is for donations made during the tax year itself. For a 2025 return, that means gifts dated between January 1, 2025 and December 31, 2025. List each one on its own line. If you gave to more organizations than the form has lines for, use the continuation sheet and carry the subtotal forward.
Section B is for donations made between January 1 and April 15 of the following year that you want to apply back to the current tax year. A gift made in February 2026 can go in Section B of your 2025 Form 321 if you want to claim it on your 2025 return. More on the tradeoffs in a moment.
Once both sections are filled in:
- Line 11: add the totals from Sections A and B.
- Line 12: enter the statutory cap for your filing status — $495 (single, head of household, married filing separately) or $987 (married filing jointly) for tax year 2025.
- Line 13: enter the smaller of line 11 or line 12. That is your current year’s credit.
Parts 2 and 3: Carryforward and Total Credit
Part 2 is where you bring forward any unused credit from the prior five tax years. The credit is nonrefundable, so if a past year’s donation was larger than the tax you owed, the leftover amount carried over. Each prior year gets its own line, and the form walks you through subtracting any portion already used.
Part 3 combines everything. Line 20 is your current-year credit from Part 1. Line 21 is the carryforward total from Part 2. Line 22 adds them together. That line 22 figure is your total available credit, and it is what moves to Form 301.
Filing Form 321 With Form 301 and Your Return
Form 321 never goes to ADOR by itself. You also have to complete Arizona Form 301 (Nonrefundable Individual Tax Credits and Recapture), where the QCO credit sits on line 6. Put the current-year credit in column (a), any carryforward in column (b), and the combined total in column (c). Leaving out Form 301 is one of the most common reasons the credit gets rejected or delayed, because Form 321 only calculates the number — Form 301 is what actually applies it to your tax.
Attach both forms to the Arizona return that matches your residency status: Form 140 for full-year residents, Form 140PY for part-year residents, or Form 140NR for nonresidents. Commercial tax software usually handles the attachment and the data transfer to Form 301 automatically. Paper filers should put everything in the same envelope.
The deadline for tax year 2025 returns is April 15, 2026. An extension filed on Arizona Form 204 pushes the filing deadline to October 15, 2026, but any tax owed is still due April 15.
Credit Caps for 2025
The caps are adjusted each year for inflation under A.R.S. § 43-1088(H). For tax year 2025:
- $495 if you file as single, head of household, or married filing separately
- $987 if you file as married filing jointly
Married couples who file separately each get up to $495, not $987 apiece. The credit can reduce your Arizona tax liability to zero, but it will not generate a refund by itself. Anything you cannot use this year carries forward for up to five consecutive tax years.
The January 1–April 15 Donation Window
Arizona lets you treat a donation made between January 1 and April 15 as if it were made in the prior tax year. A gift dated March 1, 2026 can be claimed on either your 2025 return or your 2026 return. You cannot claim it on both.
Which year is better depends on the cap and your tax liability. The 2026 caps are higher ($506 single, $1,009 joint), so if you are donating near the limit, applying the gift to the 2026 return may let you claim more. If you apply a January-through-April donation to the prior-year return, you also have to adjust your following year’s Arizona Schedule A so you do not also deduct it there — the Form 321 instructions require that adjustment to prevent double-dipping.
Common Mistakes
- Using the wrong QCO code or an outdated one. Verify the code against the ADOR list for the tax year you are filing.
- Filing Form 321 without Form 301. The credit does not get processed without both.
- Donating to a charity that is not on the certified QCO list. Only ADOR-certified organizations qualify. If a charity lost its certification mid-year, only gifts made while it was certified count.
- Married filing separately spouses each claiming the joint cap. Each spouse is capped at $495 for 2025, not $987.
- Claiming the same January-to-April donation on two returns.
If You Already Filed and Forgot the Credit
You can go back and claim a QCO donation you missed by filing Arizona Form 140X (Amended Individual Income Tax Return) with a corrected Form 321 and Form 301 attached. Arizona generally gives you four years from the original due date or the date you filed, whichever is later, to claim a refund or credit through an amendment. File the Arizona amendment separately from any federal amended return; they go to different agencies.