What payroll deductions are employers required to withhold?

Payroll Tax Deductions Employers Must Withhold in Arizona

Employers operating in Arizona need to withhold specific payroll taxes from employee wages to ensure compliance with both federal and state requirements. Understanding these deductions helps maintain accurate payroll processing and reporting.

Mandatory Payroll Deductions

• Federal Income Tax: Employers must withhold federal income tax based on the employee’s Form W-4 information and IRS tax tables.
• Social Security Tax: Withhold 6.2% of wages up to the annual wage limit. Employers must also match this amount.
• Medicare Tax: Withhold 1.45% of all wages with no wage limit. Employers match this amount as well.
• Arizona State Income Tax: Employers must withhold Arizona state income tax according to the employee’s Arizona Form A-4 and state withholding tables.
• Unemployment Insurance (UI) Tax: While UI taxes are generally paid by employers, some deductions may apply for certain employee contributions depending on specific circumstances.

Additional Considerations

• Local Taxes: Arizona does not impose local payroll taxes, simplifying withholding requirements.
• Voluntary Deductions: Employers may also withhold voluntary deductions such as retirement contributions, health insurance premiums, and wage garnishments but must ensure proper authorization and recordkeeping.
• Employee Classification: Proper classification of employees versus independent contractors is essential to determine withholding obligations and avoid compliance issues.

Operational Tips for Arizona Employers

• Use updated IRS and Arizona Department of Revenue withholding tables to calculate accurate deductions.
• Maintain clear records of all payroll deductions and deposits to meet federal and state reporting requirements.
• Automate payroll processing where possible to reduce errors and streamline tax filings.
• Stay informed on any changes to withholding rates or tax laws as of 2026 by regularly consulting official state and federal resources.