What tax forms are required for new hires?

Tax Forms Required for New Hires in Arizona

When hiring employees in Arizona, it is essential to collect and manage the correct tax forms to ensure compliance with federal and state regulations. Proper handling of these forms supports accurate payroll processing and tax reporting.

Federal Tax Forms

• Form W-4 (Employee's Withholding Certificate): Every new employee must complete a W-4 form. This form determines the amount of federal income tax to withhold from their paychecks.
• Form I-9 (Employment Eligibility Verification): Employers must verify the identity and employment authorization of each new hire using Form I-9. This form must be completed within three business days of the employee’s start date.

Arizona State Tax Forms

• Arizona Form A-4 (Employee's Arizona Withholding Percentage Election): New hires in Arizona should complete Form A-4 to specify state income tax withholding preferences. This form helps employers withhold the correct amount of Arizona state tax.

Additional Operational Considerations

• Recordkeeping: Maintain copies of all tax forms securely for at least four years to comply with IRS and Arizona Department of Revenue requirements.
• Payroll Setup: Use the information from W-4 and A-4 forms to configure payroll systems accurately for federal and state tax withholding.
• Reporting Requirements: Report new hires to the Arizona New Hire Reporting Center within 20 days of their start date to comply with state regulations and support child support enforcement.
• Employee Classification: Ensure proper classification of workers as employees or independent contractors to determine which tax forms and withholding rules apply.

As of 2026, staying current with any updates to federal or Arizona tax forms and withholding rules is critical for smooth hiring and payroll operations.