Arizona State Income Tax 2026: 2.5% Flat Rate
Arizona enacted a landmark flat income tax rate of 2.5% in 2023, replacing its prior graduated system and instantly making it one of the most tax-competitive states in the country. For technology professionals comparing Phoenix against higher-cost markets — particularly California — the combination of Arizona's very low income tax and significantly lower cost of living creates a compelling purchasing-power case.
Arizona flat income tax (2026): 2.5% × $150,000 = $3,750. Arizona enacted the 2.5% flat rate in 2023, replacing a graduated system. This is among the lowest state income tax rates in the US for states that do levy income tax.
At 2.5% flat, Arizona's income tax is lower than every other state that levies an income tax except Pennsylvania (3.07%), North Carolina (3.99%), and several others in the lower range. On a $150,000 salary, Arizona state income tax is just $3,750. Compared to a California resident in the same income bracket (effective state rate roughly 8–9%, paying approximately $12,000–$13,500 in state taxes), the Arizona advantage is approximately $8,500–$10,000 per year in take-home pay from state tax alone.
Arizona's flat tax was enacted through a combination of legislative action and a court ruling that struck down a 2020 ballot measure that had added a 3.5% surcharge on income over $250,000. The 2.5% flat rate applies to all income levels without the surcharge, making the Arizona tax system unusually straightforward. The rate has been in effect since January 2023 and there are no announced changes for 2026.
Phoenix has a cost-of-living index of approximately 0.97 — essentially at the national average and well below the 1.40 index for Los Angeles or 1.74 for San Francisco. For a California-based professional relocating to Phoenix, the combined impact of COL reduction plus income tax savings can represent a $30,000–$50,000 effective annual raise on a $200,000 total compensation package, without any nominal salary change. The Compare Job Offers tool lets you model your specific numbers.
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Total Comp CalculatorFrequently asked questions: Arizona income tax
What is Arizona's state income tax rate in 2026?
Arizona's flat income tax rate is 2.5% in 2026, applying uniformly to all taxable income. This rate has been in effect since January 2023, when Arizona replaced its prior graduated system with the flat rate.
When did Arizona change to a flat income tax?
Arizona enacted a 2.5% flat income tax rate effective January 2023. Prior to this, Arizona used a graduated income tax with rates up to 4.5%. The flat rate was established through legislative action and a court ruling that clarified the tax structure.
How does Arizona compare to California for income taxes?
Arizona's 2.5% flat rate is dramatically lower than California's graduated system, which reaches 13.3% at the top. On a $150,000 salary, the state income tax difference is approximately $8,500–$10,000 per year in favor of Arizona. Combined with Arizona's lower cost of living relative to California metro areas, the real purchasing-power difference is even larger.
Tax rates shown reflect the best available 2026 information and are provided for informational purposes only. State income tax rates, brackets, and rules change frequently. This page is not tax advice. Consult a qualified tax professional for advice specific to your situation. © CompCalc — compensationcalculator.xyz