What Is an Employer Identification Number (EIN)?
An Employer Identification Number (EIN) is a unique 9-digit number assigned by the IRS to identify your business for federal tax purposes. It’s also known as a Federal Tax Identification Number and is essential for opening a business bank account, hiring employees, and filing taxes.
How to Get Employer Identification Number
There are four main ways to get your EIN from the IRS:
1. Apply Online (Fastest Method)
- Visit the IRS EIN Assistant
- Available Monday to Friday, 7 AM to 10 PM EST
- Receive your EIN immediately upon completion
2. Apply by Fax
- Fill out Form SS-4
- Fax it to the IRS at:
- (855) 641-6935 (within the U.S.)
- (304) 707-9471 (international)
- Get your EIN in 4 business days
3. Apply by Mail
- Complete Form SS-4
- Mail it to:
Internal Revenue Service
Attn: EIN Operation
Cincinnati, OH 45999 - Processing time: 4–6 weeks
4. Apply by Phone (International Applicants Only)
- Call +1-267-941-1099
- Available Monday to Friday, 6 AM to 11 PM EST
What You’ll Need to Apply
- Legal name of your business
- Responsible party’s name and SSN or ITIN
- Business address and phone number
- Reason for applying (e.g., starting a new business)
Why You Need an EIN
- Open a business bank account
- Apply for licenses and permits
- File business taxes
- Hire employees legally
Final Thoughts
Knowing how to get an Employer Identification Number is essential for any new or growing business. The online application is the fastest and most convenient method, especially for U.S.-based applicants.
