Form SS-4 is a form from the Internal Revenue Service (IRS) that you can use to apply for an Employer Identification Number (EIN). An EIN is a nine-digit number that employers, corporations ...

Purpose of the SS-4 Form An EIN is necessary for certain businesses, as it allows the IRS to identify your business for tax purposes when it is not appropriate to use your Social Security number.

Mail applications take the longest. The IRS says businesses should expect to receive an EIN four to five weeks after ...

Form SS-4: Application for Employer Identification Number IRS Form SS-4, also called the Application for Employer Identification Number, is not a business tax form per se.

Prior to this rule change and on a pre-2018 iteration of the Form SS-4, applicants weren’t required to provide an SSN or ITIN if the sole purpose for obtaining an EIN for a business entity was ...