Arizona income tax goes up to 2.5% at the top bracket. Calculate your combined federal + state effective tax rate for 2026. Formula shown, sources cited — no account required.
Arizona's flat 2.5% income tax rate replaced a graduated system in recent years and applies to all taxable income above the exemption threshold. For a median earner at $81,486, the state tax bill is straightforward to calculate — roughly $2,037 annually before deductions. Arizona conforms closely to federal adjusted gross income definitions, so most federal deductions flow through to the state return. One useful Arizona-specific break is the exemption for Arizona National Guard income and certain military retirement pay. At the combined federal and state level, the median Arizona household faces an effective all-in rate typically in the 18–22% range. The flat structure means no bracket cliff effects to plan around, which simplifies year-end tax decisions. Run the tax bracket calculator with your Arizona income to see both layers and identify the true marginal cost of additional earnings.
Arizona Tax Brackets Explained: Low State Rate Keeps Bills Down (2026)
Arizona has a state income tax with a top marginal rate of 2.5%. On top of federal rates (10%–37%), residents can face a combined marginal rate exceeding 35% at higher income levels. However, your effective rate is always lower than the marginal rate because only income above each threshold is taxed at that bracket's rate.
The median household in Arizona earns $81,486/year. At that income (single filer), the federal effective rate is approximately 12–14%, bringing total income tax (federal + state) to roughly 14–16%.
How Marginal vs. Effective Rate Works
The marginal rate is the rate on your last dollar of income — it does not apply to all income. The effective rate is your total tax divided by total income. For example, someone earning $100,000 in Arizona has a 22% federal marginal rate but an effective federal rate of roughly 15%, because the first $44,725 (2024) is taxed at 10% and 12%, not 22%.