Arizona’s flat rate and the 25% long-term break
Arizona replaced its graduated brackets with a single 2.5% rate, so every dollar of Arizona taxable income, gain included, carries the same rate. What makes Arizona different is the subtraction for long-term gains: 25% of net long-term capital gain from assets bought after December 31, 2011 comes off the state base before the rate applies.
That means the effective Arizona rate on a qualifying long-term gain is about 1.875%, while a short-term gain or an asset bought in 2011 or earlier pays the full 2.5%. A single filer whose Arizona taxable income climbs from $60,000 to $110,000 owes $1,250 more before credits; if that $50,000 were all qualifying long-term gain, the subtraction would shrink the increase in the base to $37,500. Keep purchase-date records, especially for inherited or gifted shares.
Arizona approved resident annual comparison
Arizona’s actual 2026 Form 140ES worksheet applies 2.5% to approved state taxable income. This is the current estimated-income-tax rate; an older statutory table containing historical graduated rates is not substituted. With no credit change, an additional $20,000 of approved Arizona taxable income adds $500 to this estimate. A federal long-term classification alone does not establish the Arizona taxable amount.
Section 43-1022 permits a 25% subtraction for qualifying net long-term capital gains from assets acquired after December 31, 2011. Acquisition dates and netting matter. Gifts and inheritances require the relevant transferor acquisition history; an unsupported date cannot become an approved subtraction. Prepare the complete state addition and subtraction reconciliation before applying deductions and exemptions in each scenario.
Use the resident annual-base mode for independently approved whole-dollar Arizona taxable income and actual usable nonrefundable credit totals. The model repeats the 2.5% annual calculation then subtracts approved nonrefundable credits from each annual tax before comparing net liabilities. Small-business-income elections, special categories, nonresident allocation and final return effects require entered final liabilities. The 2026 payment booklet is evidence for an estimate, not a claim that every final filing instruction is already published.
Arizona preparation checklist
- Actual state taxable bases after approved basis, netting, deductions and exemptions
- Acquisition date for 25% subtraction
- Small-business election outside ordinary scope