An Employer Identification Number (EIN) is used to identify a business for tax purposes with the Internal Revenue Service (IRS). An EIN or FEIN, also referred to as a Tax Identification Number (TIN), is similar to a social security number for your business. Every business, except for certain sole proprietorships that do not have any employees, should have a federal employer identification number (FEIN). Certain nonprofit organizations for example: churches, clubs, etc., trusts, and estates must also have an EIN.
A business is required to obtain a Federal Employer ID Number if it hires employees or meets other IRS guidelines. In addition, banks usually require businesses to obtain an Employer ID Number prior to opening a business bank account.