what is the difference between an ein and a tax id number?
Difference Between EIN and TIN. TIN, or Tax Identification Number, is a nine digit number issued to companies for tax purposes, and this number represents the status of the company with the internal revenue services. This number is given to a company to make the issue of creating and taking care of the business at hand more effective and efficient.
EINs are issued by the Internal Revenue Service and typically stay with a business for as long as the company is open. The IRS is a national agency, so even if a business relocates and has to get a new state tax ID, its EIN will stay the same.