EIN (Employer Identification Number)
An EIN, or Employer Identification Number, is a unique nine-digit number assigned by the IRS to identify a business entity for tax purposes. Also called a Federal Tax ID Number or FEIN.
What Is an EIN?
An Employer Identification Number (EIN) is a nine-digit number (formatted as XX-XXXXXXX) that the IRS assigns to businesses, nonprofits, trusts, estates, and other entities. It functions like a Social Security Number but for your business.
Who Needs an EIN?
You need an EIN if you:
Sole proprietors without employees can use their SSN, but getting an EIN is recommended to protect your personal information.
How to Get an EIN
1. Apply online at IRS.gov (free, instant — available Mon-Fri, 7am-10pm ET)
2. Apply by fax using Form SS-4 (response in ~4 business days)
3. Apply by mail using Form SS-4 (response in ~4 weeks)
The online application is the fastest method and provides your EIN immediately upon completion.
EIN vs SSN vs ITIN
Cost
Getting an EIN from the IRS is completely free. Beware of third-party sites that charge fees for EIN applications — you can always apply directly with the IRS at no cost.
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