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State program

Arizona Credit for Increased Research Activities

A two-tier state credit modeled on the federal research credit, with a partial refund available to small companies.

  • Partly refundable

Last reviewed October 2026

Program overview

Arizona offers one of the more generous state research incentives. The credit is calculated on Arizona-based qualified research expenses in excess of a base amount and is tiered so that spending above a threshold earns a lower marginal rate. Companies with fewer than 150 full-time employees may apply to the Arizona Commerce Authority for a partial refund of the unused credit, which turns the incentive into cash for pre-profit businesses. An additional credit is available for basic research payments made to Arizona universities.

Eligibility

C corporations and pass-through entities with qualified research expenses incurred in Arizona that also qualify under IRC Section 41. Refund applications require Arizona Commerce Authority certification and fewer than 150 full-time employees.

Benefits

Non-refundable credit against Arizona income tax, with up to 75% of the excess credit refundable for qualifying small businesses.

Caps, deadlines and forms

Caps and limits

No annual cap is stated for this program.

Deadlines

Claimed on the annual return; no separate application deadline is stated.

Forms

Filing forms are listed by the revenue authority: official source (opens in a new tab).

Arizona IDR questions

What an examiner is likely to ask about this credit. S1–S7 apply to every state claim; the rest come from this program's own rules.

  1. S1Confirm the research was physically performed within Arizona.
  2. S2Provide the Arizona qualified research expense calculation and base amount.
  3. S3Reconcile Arizona expenses to the federal Form 6765.
  4. S4Show how wages and supplies were apportioned between Arizona and other locations.
  5. S5Provide the Arizona return and credit schedule for each year claimed.
  6. S6Show the carryforward schedule for unused Arizona credits.
  7. S7Confirm the entity claiming the credit is the entity subject to Arizona tax.
  8. AZ-1Show the Arizona refund eligibility tests (such as small business status) were met in each year refunded.

Draft questions for illustration, reviewed by a specialist before any engagement.

Common weak spots

  • Expenses for research performed outside Arizona included in the Arizona claim.
  • Refund claimed without evidence that the eligibility tests were met.
  • Base amount computed from incomplete historical records.

See how your claim holds up

The mock audit drafts these questions for your own claim and scores the evidence behind each answer.

Run a mock audit for Arizona

Information on this page is general in nature, not tax advice. Program details change frequently; always confirm current rules with the relevant revenue authority or engage a specialist before acting. Last reviewed October 2026.

Find out what your research actually qualifies for

A scoping conversation takes thirty minutes and costs nothing. You leave with a view on eligibility, likely credit range and the documentation you would need.

Free R&D mock audit: completely free. Book a call or email hello@creditarmor.ai for a login.