How to Verify the Federal Tax ID Number of a Business

by Stephanie Ellen - Updated September 26, 2017
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A federal tax ID number for a business, also called a Taxpayer Identification Number (TIN), an Employer Identification Number (EIN), or a Federal Employer Identification Number (FEIN), is a nine-digit number that businesses required to file tax returns must obtain from the Internal Revenue Service. You can verify an EIN for a nonprofit organization or a public company for free.


Navigate to the Guidestar website listed in References.

Enter the employer's name in the search box, above "Start Your Search," then click the "Start Your Search" box.

Click on the charity name, then click on "Form 990 and Docs." The EIN should be listed on the first page of the 990.

Public Companies

Navigate to the Securities and Exchange Commission's Electronic Data Gathering Analysis & Retrieval (EDGAR) website listed in the References.

Click on "Search for Company Filings."

Click on a search parameter. You can search by name, ticker number, and a variety of other ways. How you search will depend on the information you have.

Click on "Find Companies" after you have entered your search parameters, then click on "CIK" in the left hand column. To view documents, click on the "documents" button, then click on the document ID number. The EIN will be on the front page of many filings, including (but not limited to) 10-Ks and 20-Fs.


  • To verify a private company's TIN, there are many for-fee services, including,, and

About the Author

Stephanie Ellen teaches mathematics and statistics at the university and college level. She coauthored a statistics textbook published by Houghton-Mifflin. She has been writing professionally since 2008. Ellen holds a Bachelor of Science in health science from State University New York, a master's degree in math education from Jacksonville University and a Master of Arts in creative writing from National University.

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