Arizona payroll tax and registration guide – Help Center Home

Updated September 8, 2023

What we'll cover:

What information OnPay needs from you
What state and local taxes and filings OnPay handles for Arizona employers
Where you can find the tax account numbers needed
Paying employees in other states?

Why is this important?

The following information requests and registration instructions are required before you can use a payroll provider to run payroll. This is in compliance with state payroll tax regulations. Without this information, OnPay is unable to file or deposit any tax payments for your company, and will not be responsible for any resulting penalties or interest. Note: If this isn't the only state where you have employees, there will be a separate guide like this one for each state where you hire and pay workers.

Let Middesk handle your state tax registrations (and more)

If you'd like help, our partner Middesk makes hiring employees and staying compliant with every state agency simple and easy.

Register with every state agency to get the tax IDs you need within minutes
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Foreign Qualify with the Secretary of State to create payroll tax accounts

Learn more about Middesk→

What information OnPay needs from you

Use this checklist to make sure you’ve covered everything required to set up your account as a Arizona employer so OnPay can accurately file and pay taxes on your behalf:

✔	To do:	What is this?
	Make sure your business is registered with the Arizona Department of Revenue	Registers your business to file and pay taxes in Arizona More info >
	Make sure your business is registered with the Arizona Department of Economic Security	Registers your business to pay required unemployment insurance in Arizona More info >
	Provide OnPay with your Arizona Tax ID and deposit schedule	The employer identification number assigned by the Arizona Department of Revenue (the same as your FEIN) More info >
	Provide OnPay with your Arizona Department of Economic Security ID	A number unique to your account with the Arizona Department of Economic Security More info >
	Provide OnPay with your Arizona Unemployment (SUI) Rate	A tax rate you receive annually from the Arizona Department of Economic Security More info >

What state and local taxes and filings OnPay handles for Arizona employers

OnPay handles the filing of all state and local taxes for businesses in Arizona, including:

Type of Tax	Form ID	Form Name	Frequency
Withholding	W-2	Wage and Tax Statement	Annual
	A1-APR	Annual Payment Withholding Tax Return	Annual
	A1-R	Withholding Reconciliation Tax Return	Annual
	A1-T	Withholding Transmittal of Wage and Tax Statements	Annual
	A1-WP	Payment of AZ Income Tax Withholding	Monthly
	A1-QRT	Quarterly Withholding Tax Return	Quarterly
Unemployment	UC-018	Unemployment Tax and Wage Report	Quarterly
Unemployment	UC-020	Unemployment Tax and Wage Report (Continuation)	Quarterly
Other	New Hire Report (Filing)	Report of New Hires	As required

Where you can find the tax account numbers needed

If you are an existing employer who has previously run payroll in Arizona, you likely already have the IDs and online accounts needed for OnPay to process your tax filings.

If you are a new employer in Arizona, you will need to register your business with the Arizona Department of Revenue and Arizona Department of Economic Security. This must be completed for OnPay to be able to file and pay your Arizona taxes.

Arizona Tax ID Number

Existing Arizona Employer:

If you are registered with the Arizona Department of Revenue, your Arizona Tax ID number is the same as your Federal Employer Identification Number (FEIN).
If you cannot locate this number, please call the Department of Revenue at (800) 843-7196.

New Arizona Employer:

Visit the AZ Taxes website and complete the registration.
This will complete your application for an Arizona TPT License, which is used to apply for transaction privilege tax, use tax, and Employer Withholding and Unemployment Insurance.
The form is processed by both the Arizona Department of Revenue and Arizona Department of Economic Security, so you only have to fill out one application.
The online registration process can take 2-3 weeks.

Unemployment Account Number and Tax Rate