Arizona and California are frequently compared as competing destinations for wealth migration. The comparison is made in real estate offices, in CPA practices, and at dinner parties in Palo Alto and Brentwood. It is also frequently oversimplified. The tax difference is real and significant. Whether it matters to any individual depends entirely on their income structure, asset base, and timeline.
01Income tax: the headline number
Arizona moved to a 2.5 percent flat income tax effective 2023, the result of legislation passed in 2021 that compressed a previously graduated structure. California's income tax remains graduated, with a top marginal rate of 13.3 percent on income above $1 million and a 1 percent mental health services surcharge on top of that for income above $1 million.
For W-2 earners at $500,000 in annual income, the state income tax difference is approximately $40,000 per year. For earners at $250,000, the difference is roughly $17,000. Below $100,000, the difference shrinks considerably and other factors, housing costs, healthcare access, proximity to family, often outweigh the tax difference.
02Property taxes: where California can win
California's Proposition 13, passed in 1978, caps property tax assessment increases at 2 percent per year regardless of market appreciation. A California homeowner who purchased in 2000 and has seen their property triple in value pays taxes on a fraction of current market value. This benefit does not transfer to Arizona.
Arizona assesses property at full cash value with taxes running 0.5 to 0.7 percent annually. A $900,000 Scottsdale home carries a tax bill of $4,500 to $6,300 per year. A California homeowner with a $900,000 home purchased 20 years ago might pay $3,000 or less. The Prop 13 benefit is often invisible to people who have always had it. It becomes visible when it disappears.
I have clients who saved $80,000 a year in state income taxes by moving to Arizona and then discovered their property tax went up $12,000 because they left Prop 13 behind. It's still a strong financial case. But it's not the clean win people expect.
03Sales and consumption taxes
Arizona's state sales tax rate is 5.6 percent with local additions bringing the total to 8 to 10 percent in most Phoenix metro cities. California's state rate is 7.25 percent with local additions bringing many cities above 10 percent. On a pure sales tax basis, California is moderately higher, but the difference in everyday spending is less significant than income tax differences for high earners.
California's gas taxes are among the highest in the nation, running roughly $0.70 per gallon in combined state and local charges versus Arizona's $0.19. For drivers, this creates a meaningful annual difference that is more visible because it appears on every fill-up. The gas tax gap alone amounts to several hundred dollars per year for an average driver.
04Business income and pass-through entities
For business owners with pass-through income, the Arizona flat rate applies to business income flowing through S corporations and partnerships. In California, that income is subject to the full graduated rate plus an additional 1.5 percent franchise tax on S corporation income above $1 million. The combined effective rate on high business income in California can exceed 14 percent.
Arizona also does not have a franchise tax or minimum business tax equivalent. California's $800 minimum franchise tax applies to all corporations and LLCs regardless of whether they are profitable. For early-stage businesses with California formation, this is a minor cost. For multi-entity structures common in real estate or private equity, the minimums accumulate.
05Who should actually care
The Arizona-versus-California tax comparison matters most to people with high W-2 income above $250,000, pass-through business income above $200,000, significant capital gains realizations, or retirees drawing from portfolios large enough that a 10-percentage-point rate difference is material. For most people, the tax difference is real but not the primary driver of relocation decisions. For the cohort it affects most, the analysis typically justifies serious investigation and often a conversation with a CPA who specializes in the transition.
