The Law Dictionary

Your Free Online Legal Dictionary • Featuring Black’s Law Dictionary, 2nd Ed.

Finding a Business Tax ID Number

editor’s top pick for LLC formation


featured llc formation partner


A business tax ID number may be referred to as a Tax Identification Number (TIN) or an Employer Identification Number (EIN). These numbers are the same as an individual’s social security number. Businesses and individuals use these numbers to report income to the Internal Revenue Service (IRS) and to pay taxes on that income. Each business has a unique TIN.

If a business or individual makes a donation to a non-profit organization such as The American Cancer Society, The Smithsonian, Goodwill, United Way, Humane Society, Red Cross, or Make a Wish Foundation, these donations can be tax deductible. In order to report your deduction to the IRS, you will need to ask the business for its TIN or EIN. If you are dropping your donation off in person, you can try asking for it at the time of the donation. You can also call the office later for the TIN. When you call, just explain that you made a donation and need their TIN for tax purposes.

Another way to find a business tax id number is to go to the Electronic Data Gathering, Analysis, and Retrieval (EDGAR) system website. EDGAR is maintained by the IRS so the information should be up to date. Anyone can access EDGAR. You can search by the company name, its stock symbol, and more. EDGAR only tracks publicly traded companies.

It will help you find the correct company in the list of results if you know the Standard Industry Classification Number (SIC) because more than one business may have the same name. Some large corporations will have more than one division with each division having different classification numbers.

Basically, the more information you have on the company, the more certain you can be that you found the right company. If you know the city and state where the business is, you can look for that in the search results. Once you find the company you are looking for, click on it and a list of reports will appear. Look under the findings column for the reports called 8-K, 10-K, or 10-Q as these are the only documents that will have the EIN or TIN.

Benefits of using the EDGAR system include its accuracy and its price. It is free to all users.


This article contains general legal information but does not constitute professional legal advice for your particular situation. The Law Dictionary is not a law firm, and this page does not create an attorney-client or legal adviser relationship. If you have specific questions, please consult a qualified attorney licensed in your jurisdiction.

This page contains affiliate links. When you buy items through affiliate links on our site we may receive a commission. 

Recent Business Formation Articles