Arizona EIN: Your Withholding ID Is the EIN Itself

Last updated November 1, 2026 · Written by the EIN Registration filing team

There is no Arizona EIN. The IRS issues it on Form SS-4. What Arizona adds comes after it: income tax withholding with the Arizona Department of Revenue, keyed to the EIN itself, an unemployment insurance account with the Arizona Department of Economic Security, and a transaction privilege tax license from the Arizona Department of Revenue if you sell taxable goods or services.

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After your EIN in Arizona

Account	Agency	Number you get	Register
State income tax withholding	Arizona Department of Revenue	Your federal EIN (withholding ID number)	AZTaxes.gov
Unemployment insurance	Arizona Department of Economic Security	Unemployment insurance employer account number	AZTaxes.gov
Sales tax	Arizona Department of Revenue	Transaction privilege tax license	AZTaxes.gov

The Arizona Joint Tax Application (Form JT-1/UC-001) is used to apply for transaction privilege tax, use tax, employer withholding and unemployment insurance. It is filed with ADOR (online through AZTaxes.gov) and is also used by the Department of Economic Security to set up the unemployment insurance account.

Arizona's Joint Tax Application, Form JT-1, is filed with the Department of Revenue but also starts your unemployment insurance registration with the Department of Economic Security. DES then sends its own letter with your Arizona unemployment insurance employer account number, separate from anything ADOR sends.

Arizona does not issue a separate state withholding number. Once you register with the Department of Revenue, the company's federal EIN is its Arizona withholding ID number, while unemployment filings use the account number DES assigns.

Also on the Arizona list

Register with the Arizona Department of Revenue through AZTaxes.gov. The Joint Tax Application (JT-1) asks for the EIN and opens the transaction privilege tax license and withholding account in one filing.
If the LLC's known place of business is outside Maricopa or Pima County, publish the notice of formation in an approved newspaper within the window stated in the Commission's approval letter, then keep the affidavit of publication with the company records.

Agency sites checked November 1, 2026 · All 50 states

What is different about Arizona

Arizona LLCs file no annual report with the Corporation Commission at all. Corporations do, which is why so much advice found online is wrong for an LLC; the only recurring state-level obligation for most Arizona LLCs is the transaction privilege tax return, and that is with the Department of Revenue, not the Commission.
Arizona still has a newspaper publication requirement for new LLCs, but only for those whose known place of business is outside Maricopa and Pima counties. LLCs in those two counties are exempt because the Commission publishes the formation record on its own site instead.
Arizona's sales tax is a transaction privilege tax imposed on the seller rather than the buyer, licensed by the Department of Revenue rather than the Commission. A new LLC that will sell anything needs that TPT license, and the application asks for the federal EIN before it asks for anything else.
Arizona uses the term statutory agent where other states say registered agent, and the agent must sign an acceptance that is filed with the articles. The Commission's eCorp portal issues the file number that identifies the LLC in state records; it is a state index, not a tax ID.

Before you apply

The SS-4 must match the Arizona Corporation Commission filing; its ACC file number is a state index, not a tax ID.

Married couple as the only owners? Arizona is a community property state, so the LLC can be treated as a disregarded entity rather than a partnership that files a return every year. The choice is made on the SS-4, and our application asks about it.

Arizona EIN questions

How do I get an EIN number in Arizona?

File IRS Form SS-4 after the Arizona Corporation Commission approves any formation filing; there is no Arizona EIN application. The Arizona Joint Tax Application (Form JT-1/UC-001) is used to apply for transaction privilege tax, use tax, employer withholding and unemployment insurance. It is filed with ADOR (online through AZTaxes.gov) and is also used by the Department of Economic Security to set up the unemployment insurance account.

Is there an Arizona EIN or state tax ID number?

No; only the IRS issues EINs (also called the FEIN or federal tax ID). Arizona's own numbers are the ACC file number from the Arizona Corporation Commission, the unemployment insurance employer account number from the Arizona Department of Economic Security, and the transaction privilege tax license from the Arizona Department of Revenue.

Does Arizona give employers a separate withholding number?

No. The Arizona Department of Revenue identifies withholding accounts by the federal EIN (the withholding ID number), so the account you open in AZTaxes.gov is keyed to the nine digits the IRS issued. That makes the EIN the thing to have before the first Arizona payroll.

Where do I register for Arizona unemployment insurance?

With the Arizona Department of Economic Security, online through AZTaxes.gov. It assigns an unemployment insurance employer account number, a separate number from the EIN.

Do I need an Arizona transaction privilege tax license?

Only if you sell what Arizona taxes. The Arizona Department of Revenue issues it through AZTaxes.gov, and your returns are filed under its number, not the EIN.

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Sources

You can also apply for an EIN directly with the IRS at irs.gov at no cost.