An employer identification number (EIN) is the business equivalent of a Social Security number. A unique identifier is assigned to the business for use in communicating and complying with the Internal Revenue Service. Just like a Social Security number, it is a 9 digit number with the first two digits as the prefix.
Employer Identification Number
A federal identification number assigned to all legal entities. Use Form SS-4 to apply. It does not matter if you will have employees, the requirement to obtain a number is based on creating a legal entity.