Arizona · Research & Development Tax Credit
Research & Development Tax Credit in Arizona (2026)
Claim credits for qualified research expenses including wages, supplies, and contract research. Small businesses can apply up to $500,000 against payroll taxes. Arizona has a flat 2.5% income tax, so a Arizona filer's combined marginal rate on the next dollar at $72,581 of income is about 24.5% (22% federal + 2.5% AZ).
2026 savings example for Arizona
Planning estimate for a single filer earning $72,581 (Arizona median household income in LevyIO's state dataset) who claims a $5,000 credit. Federal tax uses the 2026 IRS brackets after the $16,100 standard deduction; AZ tax uses the state brackets in LevyIO's dataset and assumes the state follows the federal treatment.
Estimated total savings
$5,000
Federal savings
$5,000
$7,138 → $2,138 · 22% bracket
AZ state savings
$0
Federal credit only; check for a state credit
Combined marginal rate
24.5%
Credits do not depend on the bracket
Federal × Arizona marginal rates (2026, single)
Gross-income ranges include the federal standard deduction. The AZ column is the state marginal rate at the midpoint of each range. A credit saves its face value regardless of bracket.
| Federal bracket | Gross income (single) | AZ marginal | Combined | Per $1,000 |
|---|---|---|---|---|
| 10% | $16,100 - $28,500 | 2.5% | 12.5% | $1,000 |
| 12% | $28,500 - $66,500 | 2.5% | 14.5% | $1,000 |
| 22% | $66,500 - $121,800 | 2.5% | 24.5% | $1,000 |
| 24% | $121,800 - $217,875 | 2.5% | 26.5% | $1,000 |
| 32% | $217,875 - $272,325 | 2.5% | 34.5% | $1,000 |
| 35% | $272,325 - $656,700 | 2.5% | 37.5% | $1,000 |
| 37% | Over $656,700 | 2.5% | 39.5% | $1,000 |
Eligibility & forms
Businesses conducting qualified research activities in the US
- Must involve technological uncertainty
- Process of experimentation required
- Must be technological in nature
- For a permitted purpose (new/improved product)
Federal forms: Form 6765, Form 3800
Arizona filing notes
Arizona's flat 2.5% rate simplifies planning. Use the 25% capital gains subtraction on investment income. Arizona offers generous tax credits for charitable contributions and school tuition organizations.
Common mistakes: Thinking only large companies qualify; Not documenting research activities contemporaneously; Missing the small business payroll tax offset option.
Frequently asked questions
How much can the Research & Development Tax Credit save a Arizona taxpayer in 2026?
Credits reduce tax dollar-for-dollar. In LevyIO's example, a single filer with $72,581 of income (the Arizona median household income in our state dataset) and a $5,000 credit would cut 2026 federal tax from $7,138 to $2,138, a $5,000 saving. Whether Arizona offers a matching state credit depends on the AZ return, so the estimate counts federal savings only.
What is the Arizona income tax rate for 2026?
Arizona has a flat 2.5% income tax. The AZ standard deduction in LevyIO's dataset is $14,600 single / $29,200 married. Flat 2.5% rate since 2023. 25% capital gains subtraction. Generous charitable contribution credits.
Who qualifies for the Research & Development Tax Credit in Arizona?
Businesses conducting qualified research activities in the US. The federal rules are the same in every state; the requirements are: Must involve technological uncertainty; Process of experimentation required; Must be technological in nature; For a permitted purpose (new/improved product). Arizona filers should confirm on the AZ return whether the state follows the federal treatment.
Which forms do I file to claim the Research & Development Tax Credit?
Federal: Form 6765, Form 3800. Arizona: check the Arizona Department of Revenue instructions for the matching state schedule. Common mistakes: Thinking only large companies qualify; Not documenting research activities contemporaneously; Missing the small business payroll tax offset option.
Research & Development Tax Credit in other states
Sources
Reviewed 2026-09-17. Estimates are educational planning figures computed from the IRS 2026 inflation adjustments and LevyIO's state bracket dataset; they are not tax advice.