Arizona State Taxes: Complete Guide

Arizona uses a flat 2.5% individual income tax rate as of 2023, one of the most taxpayer-friendly rates in the country. The state sales tax is 5.6%, with city and county add-ons reaching up to 10.3% in some Phoenix-area jurisdictions; businesses must separately track state, county, and city transaction privilege tax (TPT) rates. Arizona's TPT system is unique: sellers pay the tax based on gross receipts rather than collecting from the buyer, which creates confusion for new business owners unfamiliar with the distinction from traditional sales tax. Payroll taxes require Arizona employers to withhold state income tax and submit Form A1-QRT quarterly; businesses that fall behind on payroll withholding face personal liability for trust fund penalties. Back taxes in Arizona accumulate interest at 3% above the federal rate, and the Department of Revenue pursues liens, wage garnishments, and license suspensions. Real estate investors, short-term rental operators (subject to TPT), and construction subcontractors are among the most common groups with Arizona tax problems. The state offers installment plans for balances under $10,000 with no financial review required, and formal settlement programs for larger debts.