State Guide
EIN in Arizona (AZ)
How to get an EIN for your Arizona business. The EIN is a federal number from the IRS. Non-residents file Form SS-4 by fax with a passport number. $49 Standard. $97 Express.
Getting an EIN in Arizona follows the same federal IRS process used in every state. The EIN is a federal number issued by the IRS, not a state-specific ID. Non-residents file Form SS-4 by fax to 855-215-1627, entering a passport number on Line 7b instead of an SSN. The IRS online tool requires an SSN, so fax is the path for non-residents. ein.so prepares and faxes your SS-4 and delivers your EIN by email. Standard costs $49 (4-7 business days). Express costs $97 (2-3 business days).
Arizona attracts business owners with a 2.5% flat state income tax and a fast-growing economy centered in Phoenix and Tucson. Entrepreneurs form Arizona LLCs through the Arizona Corporation Commission, then attach a federal EIN to run banking, payroll, and tax filing. The EIN itself is identical whether you register in Arizona, Wyoming, or any other state. This guide explains how non-residents get an EIN for an Arizona business without an SSN, how the federal EIN differs from Arizona state tax registration, and what to do after approval.
| Detail | Information |
|---|---|
| State | Arizona (AZ) |
| State income tax | 2.5% flat rate |
| State filing authority | Arizona Corporation Commission |
| State tax authority | Arizona Department of Revenue |
| Federal EIN issuer | IRS (same in all 50 states) |
| EIN cost | $0 (IRS) / $49 (ein.so Standard) |
| IRS EIN fax line | 855-215-1627 |
Federal vs State
Is an Arizona EIN Different From a Federal EIN?
No. An Arizona EIN is the same as a federal EIN because the IRS issues every EIN as a federal number. Arizona does not create its own EIN. The same 9-digit number (XX-XXXXXXX) works for your Arizona business nationwide.
The confusion comes from a second number Arizona uses. Your federal EIN and your Arizona state tax registration are two separate items with two separate purposes.
| Identifier | Issuer | Purpose |
|---|---|---|
| Federal EIN | IRS | Federal taxes, banking, payroll, Form SS-4 |
| Arizona state tax registration | Arizona Department of Revenue | State-level taxes such as transaction privilege tax |
You may need both. The EIN does not replace Arizona state tax registration, and state registration does not replace the EIN. Get the EIN first, because most banks and payment processors require it before you open an account. See our state tax ID explainer for the distinction and our EIN cost breakdown.
Step-by-Step
How Do Non-Residents Apply for an EIN in Arizona?
Non-residents apply for an Arizona EIN by submitting IRS Form SS-4 by fax to 855-215-1627, using a passport number on Line 7b in place of an SSN. The IRS online tool requires an SSN, so the fax method is the route for non-residents. The IRS issues most correctly filed EINs within 4-7 business days.
Form Your Arizona LLC
Gather Your Documents
Complete Form SS-4
Submit by Fax and Receive Your EIN
SS-4 Field Guide for Non-Resident Arizona Owners
| SS-4 Field | Entry |
|---|---|
| Line 1 (Legal name) | Your Arizona LLC name |
| Line 4 (Address) | Your home-country mailing address |
| Line 7a (Responsible party) | Your full name as on your passport |
| Line 7b (SSN/ITIN/EIN) | Your passport number |
| Line 10 (Reason for applying) | Started new business |
| Line 16 (Principal activity) | E.g., "software," "e-commerce," "consulting" |
The most common rejection cause is address formatting for international applicants. ein.so reformats your address to an IRS-accepted style so your application is not silently rejected. See the full SS-4 form guide and the complete EIN application process. For the SSN question specifically, read EIN without SSN.
Application Methods
What Are the Ways to Get an EIN in Arizona?
You can get an Arizona EIN four ways: online, by fax, by phone, or by mail. The online method requires an SSN. Non-residents without an SSN use fax, which takes 4-7 business days when the SS-4 is error-free.
| Method | Speed | SSN needed | Cost |
|---|---|---|---|
| Online | Instant | Yes | $0 |
| Fax | 4-7 business days | No | $0 / $49 |
| Phone | Same day | No | $0 |
| 4-6 weeks | No | $0 |
The process is identical regardless of state. A non-resident can call 800-829-4933 to get an EIN by phone, but this means an international call during US business hours and live IRS questioning in English. The fax method removes that friction. ein.so handles the fax filing for $49 (Standard) or $97 (Express). See EIN processing time for full timing detail and EIN for non-residents for the non-resident overview.
Use Cases
Why Do Non-Residents Get an EIN for an Arizona Business?
Non-residents get an Arizona EIN because a US LLC cannot open a bank account, accept US payments, or file US taxes without one. The EIN is the federal tax ID that connects your Arizona-registered company to the US financial system.
Open a US Bank Account
Accept US Payments
Sell on US Marketplaces
File US Taxes and Compliance
Together, an Arizona LLC, an EIN, and a US bank account let you invoice American clients in dollars and operate a credible US business identity. Start with the apply page to begin.
Tax Considerations
What Should Arizona Business Owners Know About Taxes?
Arizona business owners face two layers of tax: federal and state. Arizona uses a 2.5% flat state income tax rate, separate from federal taxes. A foreign-owned single-member US LLC files Form 5472 with a pro-forma Form 1120 each year, with a $25,000 penalty for not filing.
Federal Filing: Form 5472 + 1120
Arizona State Income Tax
Arizona State Registration
BOI Report to FinCEN
ein.so does not provide tax advice
- The 2.5% Arizona rate and entity treatment depend on your facts; confirm with a US CPA.
- Foreign-owned LLCs face a $25,000 penalty for failing to file Form 5472.
- State filing fees and tax rules change; confirm current figures with official Arizona sources.
ein.so handles the EIN application only. Work with a US CPA familiar with non-resident matters for tax filings. Your EIN is the starting point for US tax compliance. If you also need a personal US tax number, our ITIN service costs $197 (Standard) or $297 (Express). See EIN without SSN and EIN for non-residents.
After Approval
What Do Arizona Owners Do After Getting Their EIN?
Arizona owners use the EIN to open a US bank account, register for state tax, file the BOI report, and connect payment processors. The EIN unlocks every downstream step. Complete these tasks within weeks of formation to stay compliant.
Post-EIN checklist for Arizona LLCs
- Register with the Arizona Department of Revenue if you owe transaction privilege tax or hire staff.
- File your BOI report with FinCEN as required for most LLCs.
- Open a US business bank account with Mercury or Relay.
- Plan for the annual Form 5472 filing if your LLC is foreign-owned.
- Obtain any local Arizona business licenses your activity requires.
The EIN never expires and stays attached to your Arizona LLC for the life of the entity. You reuse the same number for banking, payroll, and every federal filing. See EIN processing time to track when your number arrives.
Next Steps
After Getting Your EIN in Arizona
- Open a US bank account — Mercury and Relay accept non-resident LLC owners
- File your BOI report — required for most LLCs, free at fincen.gov/boi
- Register for Arizona state tax — separate from your federal EIN
- File Form 5472 — annually for foreign-owned LLCs ($25,000 penalty for non-filing)
- Review EIN cost and EIN processing time — plan your budget and timeline
Other states: New Jersey | Massachusetts | Colorado | Tennessee. Browse all on EIN by State. New to the process? Start with how to get an EIN and EIN without SSN.
Frequently Asked Questions
Is an Arizona EIN different from a federal EIN?
No. The EIN is a federal number issued by the IRS. It is the same 9-digit number (XX-XXXXXXX) regardless of which state you operate in. Arizona does not issue its own version of an EIN. Your Arizona business uses the federal EIN for all federal tax reporting, banking, and payment processing.
How do I get an EIN in Arizona as a non-resident?
Non-residents file IRS Form SS-4 by fax to 855-215-1627. Enter your passport number on Line 7b instead of an SSN. The IRS online tool requires an SSN, so fax is your path. ein.so prepares and faxes your SS-4 and delivers your EIN by email for $49 (Standard, 4-7 business days).
Do I need an SSN or ITIN to get an EIN in Arizona?
No. You do not need an SSN or ITIN to get an EIN. Non-residents enter a passport number on Form SS-4 Line 7b. The IRS online application requires an SSN, which is why non-residents use the fax method. ein.so handles the fax filing for applicants from over 150 countries.
How much does it cost to get an EIN in Arizona?
The IRS charges $0 for an EIN. ein.so charges $49 for Standard filing (4-7 business days) or $97 for Express (2-3 business days). Forming an Arizona LLC through the Arizona Corporation Commission carries a separate state filing fee. Confirm the current state fee on the Commission website.
What is the Arizona state income tax rate?
Arizona uses a 2.5% flat state income tax rate. This is separate from federal taxes. Your EIN is used for federal tax reporting, while a separate Arizona state tax registration handles state-level obligations. Confirm how Arizona taxes your specific entity with a US CPA before relying on any rate.
Does Arizona require a separate state tax ID?
Yes, in many cases. Arizona issues its own state tax registration through the Arizona Department of Revenue, which is separate from your federal EIN. You may need both depending on your activities, such as collecting transaction privilege tax or hiring employees. The EIN does not replace state tax registration.
How long does it take to get an EIN for an Arizona LLC?
Through ein.so, Standard processing takes 4-7 business days ($49) and Express takes 2-3 business days ($97). The DIY fax method takes 4-7 business days when the SS-4 is error-free. Calling the IRS at 800-829-4933 can be same-day but requires an international call during US business hours for non-residents.
Does a foreign-owned Arizona LLC have to file Form 5472?
Yes. A foreign-owned single-member US LLC files Form 5472 with a pro-forma Form 1120 each year. The penalty for not filing is $25,000. This applies to Arizona LLCs with foreign ownership. It is an information return, not necessarily a tax bill. Confirm your obligations with a US CPA.
Can I open a US bank account for my Arizona LLC with an EIN?
Yes. Non-residents open US business bank accounts using the EIN, formation documents, and a passport. Mercury and Relay approve many non-resident Arizona LLC owners remotely within a few business days. You receive US account and routing numbers for ACH and domestic wires. See our EIN for a bank account guide.
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