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What is the U.S. federal Employer Identification Number?
An Employer Identification Number (EIN) is a nine-digit number that the U.S. Internal Revenue Service (IRS) assigns in the following format: 00-0000000. The IRS requires the number to identify taxpayers who must file various business tax returns. EINs are used by employers, sole proprietors, corporations, Limited Liability Companies (LLCs), partnerships, nonprofit associations, trusts, estates of decedents, governmental agencies, certain individuals, and other business entities. All U.S. banks require a business entity to furnish them their EIN, prior to opening a commercial account.
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