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

New Delhi: It costs the Unique Identification Authority of India (UIDAI) 100 to generate each "aadhaar" number, which will help address the challenges of inclusion, the authority's chief Nandan ...

Creating a unique patient identification number for every person in the United States would facilitate a reduction in medical errors, simplify the use of electronic medical records, increase overall ...

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, ...

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.

Troy Segal is an editor and writer. She has 20+ years of experience covering personal finance, wealth management, and business news. Somer G. Anderson is CPA, doctor of accounting, and an accounting ...

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. Pete Rathburn is a copy editor and fact-checker with expertise in economics and personal ...