The Arizona paycheck calculator applies the A-4 withholding percentage supplied to its modeled wages, then adds any extra state withholding per check. The displayed 2.0% starting choice is a withholding election, while Arizona’s 2.5% income-tax rate applies to taxable income on a return. Those percentages should not be treated as the same calculation.
Reviewed October 29, 2026 · Supports 2025 and 2026. The original case uses ordinary 2026 wages, one employer, Arizona residence and work, and twelve equal monthly checks.
Use the Arizona Paycheck Calculator to compare the supplied A-4 election with the rest of the paycheck. This guide works through a new $72,000 annual example and separates percentage withholding, extra dollars and final tax liability.
What do the A-4 percentage choices mean?
Seven supported choices run downward from 3.5% through 3.0%, 2.5%, 2.0%, 1.5%, 1.0% and 0.5%. It also has an extra-withholding dollar field for each check. The selection should reflect the employee’s actual certificate or a clearly identified planning comparison.
The official 2026 Arizona Form A-4 explains the percentage election and the 2.0% employer default when the employee has not supplied the form. A calculator starting value does not establish that two percent meets a particular household’s tax needs.
The actual certificate also has a qualified zero-withholding election. That path is outside this calculator version; its list starts at 0.5%. Do not use the smallest listed choice as though it were zero or an exemption determination.
Keep the chosen percentage in your comparison notes so a later wage change does not obscure which election produced the result. A revised A-4 belongs with the employer. Comparing rates in the calculator does not sign a certificate, deliver it to payroll or change an existing withholding instruction.
Arizona’s federal W-4 inputs are separate. Our W-4 guide explains that certificate’s elections and units; a federal credit dollar amount is not an Arizona A-4 percentage.
Is the percentage applied to every form of gross income?
No. The A-4 instructions describe gross taxable wages for withholding, generally corresponding to federal W-2 Box 1 after relevant pre-tax reductions. That is different from adding every household income source and multiplying it by the selected percentage.
The simple state calculator assumes gross wages equal the federal, FICA and state wage bases and that no pre-tax benefits need classification. The example below deliberately satisfies that assumption.
If an actual payroll has benefit exclusions or different taxable bases, compare the real wage records before relying on the projection. Entering the benefit cost as an “other deduction” does not make the model calculate the correct pre-tax wage treatment.
The tool distributes annual wages across the selected weekly, every-two-weeks, twice-monthly or monthly schedule. It assumes a full year and one employer. Work in another state, part-year residence, bonuses, irregular wages and special exemptions need a separate review.
Its federal filing choice provides a planning setup, including a one-income starting point for joint filers. It does not combine a spouse’s actual earnings or automatically set the appropriate Arizona election.
How does $72,000 annual pay become $4,836.83 per month here?
Assume a fictional employee has $72,000 annual wages paid in twelve equal $6,000 monthly checks in 2026. Use the federal Single setting without the multiple-jobs checkbox. Federal credit, other-income, deduction and extra-withholding inputs are each zero.
The supplied A-4 percentage is 2.0%, with no extra state withholding. Local and other deductions are zero, all modeled wage bases equal gross wages, and no other payroll items are assumed.
| Component | Monthly check | Annual projection |
|---|---|---|
| Gross wages | $6,000.00 | $72,000.00 |
| Federal withholding | $584.17 | $7,010.04 |
| Arizona withholding | $120.00 | $1,440.00 |
| Employee Social Security | $372.00 | $4,464.00 |
| Employee Medicare | $87.00 | $1,044.00 |
| Pay after listed deductions | $4,836.83 | $58,041.96 |
The state line is $6,000 × 2.0% = $120. The monthly subtraction is $6,000 − $584.17 − $120 − $372 − $87 = $4,836.83. The live calculator gives the same annual and monthly results. Keep these original inputs with the result so a later comparison can isolate one changed election.
The federal annual amount is the sum of twelve rounded $584.17 deductions. It is a withholding projection, not final federal tax. Similarly, $1,440 is the Arizona withholding in this example, not a calculation of the employee’s final state tax.
What changes if only the election rises to 2.5%?
Keep every original assumption unchanged and change only the Arizona percentage from 2.0% to 2.5%. State withholding becomes $6,000 × 2.5% = $150 per month, or $1,800 for the full modeled year.
Federal withholding, Social Security and Medicare remain unchanged in this comparison. Pay after listed deductions falls by $30 monthly to $4,806.83, or $57,681.96 for the year. The annual withholding difference is $360.
| Item | 2.0% election | 2.5% election |
|---|---|---|
| Monthly Arizona withholding | $120.00 | $150.00 |
| Annual Arizona withholding | $1,440.00 | $1,800.00 |
| Monthly pay after listed deductions | $4,836.83 | $4,806.83 |
The Arizona Department of Revenue withholding guidance states that the income-tax rate is 2.5% of Arizona taxable income for 2023 and later years. That return-level rate does not mean every employee should automatically select 2.5% of payroll wages.
Deductions, credits, other income and amounts already withheld can affect the household’s final position. The calculator comparison shows a payment-timing difference; it does not establish a tax saving or an ideal election.
How does an extra $25 per monthly check differ from a rate change?
Return to the original 2.0% setting and add $25 extra Arizona withholding per monthly check. The state deduction becomes $120 + $25 = $145, and the annual state total becomes $1,740.
With the same other inputs, monthly pay after listed deductions becomes $4,811.83. The new $300 annual extra amount is $25 × twelve checks. It is not twenty-five percent and not a one-time annual payment.
Changing the payroll schedule would change how often that extra dollar amount repeats. Keep the annual wage total, percentage and per-check extra setting distinct when comparing alternatives.
When is a broader Arizona withholding review useful?
A household with multiple jobs, a working spouse, a midyear change, significant other income or credit claims should review its actual expected tax and prior payments. A full-year single-job projection cannot reconstruct that information.
ADOR’s method for evaluating an election uses the tax goal, prior withholding and remaining checks. Treat a remainder-of-year worksheet as a separate planning exercise; this calculator does not turn an annual input into a reconstruction of the checks already received.
Review any proposed election against the actual facts, then provide the required certificate through the employer’s process. A larger current paycheck can also mean less tax prepaid, rather than a lower tax liability.
What explains a difference from an actual payroll record?
Check gross taxable wages, the recorded A-4 percentage, extra state dollars, frequency and the federal W-4 setup. Benefits and withholding changes during the year can make the simple projection differ from real checks.
The federal calculator guide covers the income-tax worksheet. The Social Security guide explains its annual cap, and the Medicare guide covers the separate employer trigger for additional withholding.
Known local or other after-tax amounts can be added as annual dollars where appropriate. A zero input means no amount was supplied; it does not certify the absence of every actual payroll deduction.
Use genuine payroll figures for a later pay-statement document. The calculator itself is free, and paid document preparation has a separate preview and purchase process.
Arizona paycheck calculator questions
Is the 2.0% starting value the state income-tax rate?
No. It is a withholding choice; the state return applies its own taxable-income calculation.
Does selecting 2.5% guarantee no balance due?
No. Household income, credits and prior payments need review.
Is an extra $25 an annual amount?
It repeats on each check. On a monthly schedule, twelve payments total $300.
Can this calculator model a zero-election A-4?
That certificate path is outside the supported percentage choices.
Does a calculator change reach the employer?
No. Deliver any actual revised certificate through payroll’s process.
The Check Stubs Online Editorial Team reviewed the 2026 A-4 and checked three original live comparisons. Monthly net under the stated assumptions is $4,836.83 at 2.0%, $4,806.83 at 2.5%, or $4,811.83 at 2.0% plus $25 extra withholding.