Summary: Tariff revision reflecting the increase in the State B&O taxes. On April 1, 2020, the state Business and Occupation tax rate for Service and Other increased from .015 to .0175. The company serves approximately 2,100 residential; 235 commercial; and 4 roll-off customers on Vashon Island in King county affected by this change. The last general rate increase became effective January 1, 2019.