What is a FEIN Number? A Federal Employer Identification Number (FEIN) is a unique nine-digit number assigned by the Internal Revenue Service (IRS) to businesses and other legal entities for tax purposes. Like a Social Security number for individuals, a FEIN identifies a business to the IRS and is used for various tax-related tasks.
FEINs hold significant importance in the business world. They are required for opening bank accounts, applying for loans, and filing taxes. The use of FEINs simplifies tax administration and reduces the risk of fraud and errors. A key historical development occurred in 1962 when the IRS introduced FEINs, replacing the previously used Employer Identification Number.