What Is a Ubi Number?


The Unified Business Identifier number, or UBI, is a nine-digit number used by the state of Washington to identify businesses there to local agencies.


  • Businesses in Washington state use a Unified Business Identifier number for "filing, taxes and identification" with state agencies, according the Washington Secretary of State website.


  • Washington state's Corporations Division assigns a UBI number to a business when an owner files for one of the following classifications: corporation, limited liability company, limited partnership or other business. Check the Corporations Division page on the Washington Secretary of State website to see all classifications.


  • If a business does not fall into one of the Corporations Division's categories, it can still receive a UBI number. The business owner will need to fill out a "Master Business Application" from the Washington State Department of Licensing.


  • Don't get confused between a UBI number and a Federal Employer Identification Number (FEIN). The Internal Revenue Service assigns the latter number to a business in order to classify its federal tax account, according to the Washington Secretary of State website.


  • In 2008, "Forbes" magazine rated Washington state as the third best state for business.

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