What is a valid employer ID number (EIN)?
Updated: 3/15/2013
Article ID: IAS10703
A valid employer ID number (EIN) is nine digits long. The first two digits are separated from the remaining seven digits by a dash, like 12-3456789. An EIN is to a business what a Social Security number is to a taxpayer. Click here if you need instructions on how to apply for an EIN.