 Under the updatede scheme, the sales tax exemption applies to the first of the selling price of a qualifying new plug-in electric car, which translates into a tax savings between to for plug-in car buyers depending on where the dealer is located within the state, as the sales tax vary by county.The tax exemption could expire before July 2019 if sales of electric vehicles accelerate because legislators established that the tax break should end the month after 7,500 qualifying vehicles are sold in the state.The state Department of Licensing was directed to start a tally beginning with PEV registrations since July 15, 2015. , the state sales tax is 6.5%, and increases up to 9.8% depending on the county rate.