Business and Occupation Tax. Washington State's business and occupation (B&O) tax is a gross receipts tax; measured on the value of products, gross proceeds of sale, or gross income of the business. The rate of the tax varies by the classification of the business. 

Designation as a Hydrogen Hub. In October 2023, the Pacific Northwest, consisting of the state of Washington, Oregon, and Montana, was chosen by the Department of Energy as one of seven Regional Clean Energy Hydrogen Hubs. This designation may provide up to $1 billion in matching federal funding to accelerate commercial-scale deployment of low-cost, clean hydrogen. 

Business and Occupation Tax Exemption. Beginning January 1, 2025, manufacturers engaged in clean technology manufacturing are exempt from the B&O tax. This exemption expires January 1, 2035. Beneficiaries of the exemption are not required to report the amount of the tax preference claimed to the Department of Revenue, but must submit an annual tax performance report.

Clean Technology Manufacturing. Clean technology manufacturing is defined to mean manufacturing tangible personal property exclusively or primarily used in the following:

• vehicles, vessels, and other modes of transportation that emit no exhaust gas from the onboard source of power, other than water vapor;
• charging and fueling infrastructure for electric, hydrogen, or other types of vehicles that emit no exhaust gas from the onboard source of power, other than water vapor; 
• generation of renewable or green electrolytic hydrogen;
• production of energy from alternative energy resources;
• retrofitting of megawatt-class diesel vehicles, vessels, and other modes of transportation to hybrid diesel-electric;
• production of clean fuels; and
• storage facilities.

Tax Performance Statement. A tax preference performance statement is included. The tax preference is intended to induce certain designated behavior by taxpayers, improve industry competitiveness, and create jobs. 

It is the Legislature's specific public policy objective to provide state-level support to the clean technology sector and supplement federal incentives, including potential federal funding through the Pacific Northwest's designation as a hydrogen hub. 

To measure effectiveness, the Joint Legislative Audit Review Committee must evaluate eight years of available data, reporting its findings by December 31, 2033. The review must include an evaluation of:

• the average construction wages for eligible projects;
• the number of jobs created in the clean technology sector;
• the use of apprenticeship programs, and women, minority, or veteran-owned businesses by eligible projects;
• the degree to which the preference encourages manufacturing and component production for technologies that reduce greenhouse gas emissions; 
• whether facilities benefiting from the tax preference would have been developed without the tax preference; and
• any other relevant metric.