The Washington Department of Revenue (DOR) released interim guidance regarding the sales taxability of advertising services. Effective Oct. 1, Engrossed Substitute Senate Bill 5814 classifies the sale of advertising services as a retail sale, making it subject to Washington’s retailing business and occupation (B&O) tax and retail sales tax. This interim guidance outlines definitions, exclusions, sourcing rules, and tax responsibilities for businesses, nonprofits, and government entities related to advertising services. [Wash. Dep’t of Revenue, Interim Guidance Statements, 09/17/25]
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