EIN (Federal TAX ID) Registry: IONE, CA

A business needs an EIN in order to pay employees and to file business tax returns. To be considered a Partnership, LLC, Corporation, S Corporation, Non-profit, etc. a business must obtain an EIN. Those business that do not are considered proprietorships and the Owner / Operator SSN is used on any tax documents. Also, financial institutions such as banks, credit unions, and brokerage houses will not open an account for a corporation without an EIN.