Arizona Form A 4 – Fill Out and Use This PDF

Arizona Form A 4 PDF Details

The Arizona A-4 form, published by the Arizona Department of Revenue (ADOR), is the official withholding election document every Arizona employee must complete. It controls how much state income tax your employer deducts from each paycheck, directly affecting your end-of-year tax balance. Unlike the federal income withholding form, the Arizona A-4 uses flat percentage elections specific to Arizona state taxes.

Employees select from multiple withholding percentage tiers: 0.8%, 1.3%, 1.8%, 2.7%, 3.6%, or 5.1% of gross taxable wages. You may also elect a zero withholding rate if you had no Arizona tax liability last year and expect none for the current year, though that election expires at year-end and must be renewed annually. You can also write in an extra flat-dollar amount to be withheld from every paycheck if you want greater precision in your withholding.

New hires must submit the A-4 to their employer within the first five days of employment. If you miss that deadline, your employer must default to withholding at 2.0% of gross taxable wages until a completed A-4 is received. You can update the form at any time during the year when your financial situation changes, such as getting married, having a child, or starting a second job. Nonresident employees working temporarily in Arizona may also complete the A-4 to have Arizona state taxes withheld.

Once completed, your employer keeps the A-4 on file but does not submit it to ADOR unless specifically requested. Employers reconcile all withheld state taxes on the Arizona JT-1 withholding tax return. Keep a copy of your A-4 with your records, and revisit it whenever your tax situation changes to make sure your withholding stays accurate. You can also reference your Arizona state income tax return to compare what was withheld against what you owe.