Arizona Income Tax Calculator (2026)
Estimate your 2026 Arizona state income tax — the nation’s lowest flat rate at 2.5%, with a federal-parity standard deduction. No sign-up, no cost.
Estimate Your Arizona Tax
Each dependent is modeled as a $100 credit against your tax.
Dependent credit modeled at $100 each; Arizona’s actual credit is $100 per dependent under 17 and $25 for 17+. Arizona has no local income tax. Estimates only — your actual return may differ.
How Arizona Income Tax Works
Arizona taxes income at a flat 2.5% — the lowest flat income-tax rate in the country. That is the result of the 2021 reform (fully in effect from 2023), which replaced a graduated system that topped out at 4.5%. Arizona’s standard deduction mirrors the federal amounts, and the state offers small per-dependent tax credits instead of dependent deductions.
- One flat rate: 2.5%. Every dollar of Arizona taxable income is taxed at 2.5% — no brackets, so the marginal rate is always the same.
- Standard deduction: $16,100 single / $32,200 joint / $24,150 head of household. Arizona matches the 2026 federal standard deduction amounts, so a large slice of income is state-tax-free.
- Dependent credits: $100 under 17 / $25 for 17+. A direct credit against tax owed (this calculator models $100 each; see the note above).
- No local income tax. Arizona cities and counties do not levy income taxes.
AZ state tax = (taxable income × 2.5%) − ($100 × dependents)
(tax cannot go below $0)
Worked Example: Single, $80,000 Gross Income
| Calculation | Amount | |
|---|---|---|
| Standard deduction (single) | $16,100 | |
| AZ taxable income | $80,000 − $16,100 | $63,900 |
| AZ state tax (2.5%) | $63,900 × 2.5% | $1,597.50 |
| Effective rate | $1,597.50 ÷ $80,000 | 2.00% |
Frequently Asked Questions