Find the Arizona percentage on the 2026 A-4, not on a tax bracket chart
For a 2026 Arizona wage check, copy the election actually furnished to payroll. Arizona's form offers specified percentage choices and a place for an additional fixed amount; the employer applies the election to Arizona taxable wages. That mechanism is different from a progressive annual income-tax calculation, and the selected withholding percentage should not be described as the employee's final Arizona income-tax rate.
A new hire who did not deliver the form can be subject to the state's default procedure, so guessing a preference from the first pay stub is unsafe. Compare the stub's state line with the current election and taxable wage base. The income tax calculator addresses return-level federal liability instead; it cannot recover a missing Arizona payroll election.
Reconstruct one Arizona pay period before annualizing anything
Use gross cash wages for the check, then identify deductions that payroll treated as reducing federal wages, Arizona wages, both, or neither. Enter year-to-date Social Security and Medicare wage information where the tool asks for it, because employee FICA depends on federal wage rules and annual thresholds rather than the Arizona A-4 percentage. After-tax benefits and garnishments belong after tax, not inside taxable wages.
Pay frequency matters to the federal Publication 15-T method even though Arizona's elected percentage is direct. Weekly and biweekly are not interchangeable, and semimonthly is not the same as every two weeks. To translate a stated annual salary into a gross-period cross-check, use the salary calculator before applying the payroll inputs.
Explain why the Arizona stub and final return can disagree
Withholding is a prepayment. Multiple jobs, a midyear A-4 change, nonwage income, deductions, credits, and household circumstances can make the eventual Arizona return differ from the accumulated state withholding. The same principle applies federally: Form W-4 choices drive payroll withholding, while the filed return reconciles total income, deductions, credits, and payments.
For a cash-focused comparison, send the completed scenario to the bring-home pay calculator and keep the Arizona state line explicit. Do not use a net-pay difference to infer a hidden tax rate until benefit elections, extra withholding, and after-tax deductions have also been reconciled.
Limit the Arizona estimate to ordinary employee wages
This workflow does not determine Arizona residency, interstate sourcing, exemption eligibility, special supplemental-wage treatment, tips, equity compensation, fringe benefits, corrected payroll, or employer obligations. It also does not include every possible local, tribal, retirement, insurance, or court-ordered deduction. A zero Arizona election has eligibility consequences that the arithmetic cannot approve.
Keep the 2026 pay stub, W-4, A-4, deduction documentation, and year-to-date wage totals together. When an actual payroll record differs, the employer's system and governing publications control. The calculator is a transparent estimate for one declared scenario, not individualized tax or legal advice and not an instruction to alter withholding.
Before changing an Arizona election, compare gross periods in the salary calculator, isolate a separately paid incentive in the bonus tax calculator, and value confirmed premium hours with the overtime calculator.