The Unified Business Identifier (UBI) number is a unique number that is assigned to your business when you register with the Washington Secretary of State to form a corporation, limited liability company, limited partnership, or other business entity.
If your business is not a type required to be registered with the Secretary of State, your UBI number will be provided when you complete a Master Business Application with the Department of Revenue.
The UBI number will be used with other state agencies for filing, taxes, and identification.
Nicole Bolan, Attorney at Law
Blado Kiger Bolan, Tacoma, Wash.
