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EIN

A nine-digit IRS-issued tax identification number for U.S. business entities, equivalent to a Social Security Number for a company.

The Employer Identification Number (EIN) is the IRS's tax ID for businesses, formatted XX-XXXXXXX. It is required to open a U.S. business bank account, hire employees, file federal tax returns, and onboard most payment processors. Non-residents apply via Form SS-4, faxed or mailed to the IRS — online application requires an SSN or ITIN. Wait time for non-resident fax application is currently 4–6 weeks; expedited services typically resolve in 5–10 business days.

Also known asEmployer Identification Number, Federal Tax ID, FEIN

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