IRS Form SS‑4 – Application Form No. 4 (Employer Identification Number)

IRS Form SS‑4, also known as Application Form No. 4, is the official document used to request an Employer Identification Number (EIN) for a business, trust, estate, or other entity. An EIN is required for tax reporting, opening bank accounts, and hiring employees.

What Is IRS Form SS‑4?

Form SS‑4 is a fillable PDF provided by the Internal Revenue Service. It collects basic information about the applicant, such as legal name, address, type of entity, and reason for applying. The form is free, publicly available, and can be completed electronically.

How to Fill Out Form SS‑4 Online

Instead of downloading the PDF and opening it in a separate editor, simply click the "Fill out this form" button on this page. The Formize PDF Filler app will load directly in your browser, letting you complete the form in a few clicks:

• Enter the required data in each field.
• Use the navigation pane to jump between sections.
• Save your progress at any time and return later.
• When finished, download the completed PDF or submit it online if you have a secure IRS portal.

Common Mistakes to Avoid

• Leaving fields blank: The IRS rejects applications with missing required information.
• Incorrect Entity Type: Choose the exact classification (e.g., sole proprietorship, LLC, corporation).
• Mismatched Names: Ensure the legal name matches the name on any existing registrations.
• Wrong Reason for Applying: Select the appropriate reason (new business, banking, hiring employees, etc.).

Where to Submit Your Completed Form

After you’ve filled out the form, you can:

• Fax it to the IRS at 855‑641‑6935 (for international applicants).
• Mail it to the address listed in the form’s instructions.
• Apply online via the IRS EIN Online Assistant if you prefer a fully digital process.

Download the Fillable PDF

If you need a copy for offline use, the official fillable PDF is available here: IRS Form SS‑4 (PDF).

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