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Arizona Payroll Tax Registration
Updated: Sep 5
A Complete Guide for Arizona Employers
Planning to hire employees in Arizona? Before running payroll, your business may need to register for applicable Arizona payroll tax accounts, including state income tax withholding and unemployment insurance (UI) tax.
Arizona uses the Joint Tax Application, Form JT-1, to begin the registration process for employer withholding and unemployment insurance. The Arizona Department of Revenue (ADOR) processes the withholding registration, while the Arizona Department of Economic Security (DES) determines unemployment insurance liability and issues the UI employer account number.
Whether you are hiring your first employee in Arizona, expanding from another state, or adding a remote employee working in Arizona, proper payroll tax registration helps ensure your payroll setup is ready before you begin processing wages.
Understanding Arizona Payroll Taxes
Arizona employers may need to register for:
Arizona Employer Withholding Tax
Arizona Unemployment Insurance (UI) Tax
Other state or local business tax registrations that may apply based on the business and its activities
For employer withholding and unemployment insurance, Arizona uses Form JT-1, Joint Tax Application. The application is submitted through the Arizona Department of Revenue, which forwards the applicable information to DES for unemployment insurance processing.
Step 1: Register for Arizona Employer Withholding Tax
Agency
Arizona Department of Revenue (ADOR)
Registration Form
Arizona Form JT-1, Joint Tax Application
Arizona employers withholding Arizona income tax from employee wages must register their EIN with ADOR. Registration is completed through the JT-1 application available through AZTaxes.gov.
Who May Need to Register?
You may need Arizona withholding registration if your business:
Has employees performing services in Arizona
Pays wages subject to Arizona income tax withholding
Is required to withhold Arizona income tax from employee compensation
Arizona generally requires employers to withhold Arizona income tax from compensation for services performed within Arizona.
How to Register
Online:Complete the Joint Tax Application through the Arizona tax portal.
Paper:Complete the current Arizona Form JT-1 and submit it according to the Arizona Department of Revenue's instructions.
After registration, your business can use its EIN as the Arizona withholding ID number for filing purposes.
Step 2: Register for Arizona Unemployment Insurance
Agency
Arizona Department of Economic Security (DES)
Registration Form
Form JT-1 / UC-001, Joint Tax Application
Arizona uses the same Joint Tax Application to begin the unemployment insurance registration process.
When the JT-1 is submitted to ADOR, the information applicable to unemployment insurance is forwarded to DES. DES then reviews the business separately to determine whether it is liable for Arizona unemployment insurance.
Who May Need to Register?
Arizona employers may need to register for UI when they become subject to Arizona unemployment insurance requirements.
This can include businesses that:
Begin employing workers in Arizona
Establish payroll in Arizona
Expand an existing business into Arizona
Become liable for Arizona unemployment insurance under state requirements
What Happens After Registration?
DES will issue a Determination of Unemployment Insurance Liability when the registration has been processed.
If the business is determined liable, the notice provides important information including:
Arizona UI employer account number
UI coverage start date
Applicable tax rate
Basis for UI liability
Arizona Payroll Tax Registration Process
For most employers, the registration process can be summarized as:
1. Gather Business Information
Prepare information such as:
Federal Employer Identification Number (FEIN/EIN)
Legal business name
Business address
Arizona business location, if applicable
Responsible-party information
Employee and payroll information
Business start date
Other information requested on Form JT-1
Arizona requires the federal EIN on the application for unemployment insurance processing.
2. Complete Form JT-1
Submit the Arizona Joint Tax Application through the appropriate Arizona registration process.
3. Arizona Processes the Registration
ADOR processes the withholding registration, while DES separately reviews the unemployment insurance portion of the application.
4. Receive Your State Account Information
Depending on the registration, you may receive:
Arizona withholding registration information
Arizona UI employer account number
UI liability determination
Applicable tax rate information
Arizona Employee Withholding Requirements
Once your business has registered for Arizona withholding, you also need to make sure employee withholding information is properly handled.
New employees subject to Arizona income tax withholding generally complete Arizona Form A-4, Arizona Withholding Percentage Election, within five days of employment.
Your payroll system should be configured using the applicable Arizona withholding information before payroll is processed.
Arizona Payroll Tax Filing and Payments
Arizona employers may have different withholding deposit and filing requirements depending on the amount of Arizona income tax withheld.
ADOR states that withholding deposit schedules can include annual, quarterly, monthly, semi-weekly, or next-business-day schedules depending on the employer's withholding activity.
Arizona withholding returns are generally filed electronically, subject to applicable requirements and exceptions.
Because filing and payment requirements can vary, employers should confirm the applicable schedule with the Arizona Department of Revenue.
Arizona Payroll Registration for Remote Employees
Hiring a remote employee who works from Arizona can create additional payroll tax considerations.
If an employee performs services in Arizona, the employer may need to evaluate Arizona withholding and unemployment insurance registration requirements.
This is particularly important for businesses expanding from another state and hiring their first Arizona-based remote employee.
Before running payroll for an Arizona employee, confirm whether your business needs Arizona payroll tax registration.
What Information Do You Need for Arizona Payroll Registration?
Businesses generally need information such as:
Federal EIN
Legal business name
Business address
Responsible-party information
Business entity information
Arizona work location
Employee information
Payroll start date
Expected payroll information
Business activity information
The exact information required may depend on the business and registration circumstances.
Common Arizona Payroll Registration Mistakes
Employers can run into problems when they:
Start payroll before completing required state registrations
Register for withholding but overlook unemployment insurance requirements
Enter incorrect business information on the application
Fail to provide the EIN
Do not properly configure Arizona withholding in their payroll system
Assume registration in another state automatically covers Arizona
Do not keep state account information and registration records organized
Proper registration before payroll begins can help reduce delays and unnecessary corrections.
How U.S. TAX BAY Can Help
Registering for state payroll taxes can be time-consuming, particularly when your business is expanding into multiple states.
U.S. TAX BAY helps businesses with Arizona payroll tax registration and multi-state payroll setup.
Our support can include:
Arizona payroll tax registration
Arizona withholding registration
Arizona unemployment insurance registration
State payroll account applications
Multi-state payroll tax registration
Payroll account setup support
State tax account information organization
Payroll provider registration support
Ongoing payroll tax account maintenance
We help businesses organize the applicable state registrations and account information so their payroll setup is ready before processing employee wages.
Arizona Payroll Tax Registration with U.S. TAX BAY
Hiring your first employee in Arizona? Expanding into Arizona? Adding a remote employee?
U.S. TAX BAY can help you navigate the Arizona payroll tax registration process and coordinate the applicable state payroll accounts.
Arizona Payroll Tax Registration FAQ
Do I need to register for payroll taxes in Arizona?
If your business has employees performing services in Arizona, you may need to register for applicable Arizona payroll tax accounts, including employer withholding and unemployment insurance. Requirements depend on your specific business and employee circumstances.
What form is used for Arizona payroll tax registration?
Arizona uses Form JT-1, Joint Tax Application, to begin registration for employer withholding and unemployment insurance.
Where do I register for Arizona payroll taxes?
The registration process begins with the Arizona Department of Revenue through its Arizona tax registration system. Information applicable to unemployment insurance is forwarded to the Arizona Department of Economic Security.
What is the Arizona unemployment insurance account number?
The Arizona Department of Economic Security issues the UI employer account number after reviewing the business's unemployment insurance liability.
What is Arizona Form A-4?
Form A-4 is the Arizona Withholding Percentage Election completed by employees to tell their employer how much Arizona income tax should be withheld from their wages.
Can U.S. TAX BAY help with Arizona payroll tax registration?
Yes. U.S. TAX BAY can assist with Arizona withholding and unemployment insurance registration, state payroll account setup, and multi-state payroll registration support.
Official Arizona Resources
For current registration requirements and forms, employers should refer to:
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