Employer ID Numbers (EIN)
An Employer Identification Number (EIN) is also known as a Federal Tax Identification Number, and is used to identify a business entity.

Generally, businesses need an EIN. You may apply for an EIN in various ways, and now you may apply online. This is a free service offered by the Internal Revenue Service. You must check with your state to make sure you need a state number or charter.

Individual Taxpayer Identification Number (ITIN)
An Individual Taxpayer Identification Number (ITIN) is a tax processing number issued by the Internal Revenue Service. It is a nine-digit number that always begins with the number 9 and has a 7 or 8 in the fourth digit, example 9XX-7X-XXXX.

IRS issues ITINs to individuals who are required to have a U.S. taxpayer identification number but who do not have, and are not eligible to obtain a Social Security Number (SSN) from the Social Security Administration (SSA).

ITINs are issued regardless of immigration status because both resident and nonresident aliens may have U.S. tax return and payment responsibilities under the Internal Revenue Code.

Individuals must have a filing requirement and file a valid federal income tax return to receive an ITIN, unless they meet an exception.