Washington DOR Issues Excise Tax Advisory on Use, B&O Tax for Self-Produced Fuels

The Washington Department of Revenue (DOR) issued an excise tax advisory regarding the application of state and local use tax and business and occupation (B&O) tax to self-produced fuels, including biomass, refinery fuel gas, catalyst coke, diesel, biodiesel, hydrogen, and green coke. The advisory provides details on tax rates and exemptions for different types of self-produced fuels used by extractors and manufacturers. [Wash. Dep’t of Revenue, Excise Tax Advisory, 09/23/25]

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