What is a tax ID number? It's a unique nine-digit number issued by the Social Security Administration or the IRS to anyone ...

Like any individual, a business needs an identifier to separate it from every other company. Most small business owners get a separate tax identification number (TIN) in order to conduct business, ...

SSN is a unique identification number associated with US citizens and some non-Americans living in the country. It has been around since 1936, introduced just a year after the Social Security ...

Companies, like people, are usually known by their names, but people and companies both have other types of identification, often issued by government agencies in the form of identification numbers.

EIN serves as a unique identifier for businesses, similar to an individual's SSN. Businesses, especially with employees or those needing to file certain taxes, must obtain an EIN. Applying for an EIN ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Khadija Khartit is a strategy, investment, and funding expert, and an educator of fintech ...