How to Get an EIN for Your Marketplace Business in Arizona (2026)

Operating a marketplace business in Arizona requires careful attention to legal and tax obligations. One crucial step is obtaining an Employer Identification Number (EIN) from the IRS. This guide explains how to get an EIN for your Arizona marketplace in 2026, ensuring you're compliant and ready for success. Lovie can streamline this process, automating the application and integration with your business formation.

What is an EIN?

An Employer Identification Number (EIN) is a unique nine-digit tax identification number assigned by the IRS to business entities operating in the United States. It's essentially a Social Security number for your business, used to identify your marketplace for tax purposes, open bank accounts, and hire employees.

How to Apply for an EIN

  1. Determine Your Eligibility: Confirm that your Arizona marketplace business requires an EIN. Generally, LLCs with multiple members, corporations, and businesses that hire employees need an EIN. Sole proprietorships without employees may use their Social Security number, but an EIN is often still recommended.
  2. Choose Your Business Structure: Decide on the legal structure for your Arizona marketplace (e.g., LLC, S-Corp, C-Corp). This choice impacts your tax obligations and liability. Common options include forming an LLC in Arizona, known for its flexibility and liability protection.
  3. Prepare Form SS-4: Complete IRS Form SS-4, the Application for Employer Identification Number. You can download the form from the IRS website. This form requests information about your Arizona marketplace, including its legal name, address, responsible party, and business activity.
  4. Submit Your Application: You can apply for an EIN online through the IRS website, by fax, or by mail. The online application is the fastest method and typically results in immediate EIN assignment.
  5. Receive Your EIN: Once your application is approved, you'll receive your EIN. If you applied online, you'll receive it immediately. If you applied by fax or mail, it may take several weeks.
  6. Safeguard Your EIN: Your EIN is confidential and should be protected. Avoid sharing it unnecessarily. Use it only for official business purposes.

Start your formation with Lovie — $20/month, everything included.