Flexcar/Zipcar users around Washington State are going to see the price of their car sharing rise this week as a nearly 10% car rental tax is going to be applied to their services. The rental car companies were displeased with the exemption for car sharing since they consider their services comparable, and the state's tax collectors agreed. There's an interesting balance at work here. On one hand, car sharing services (like rental car companies) utilize public roads and benefit from many public entities and should therefore pay taxes. On the other hand, the company does pay taxes on its income, gas, payroll, et cetera and helps the city lower its congestion by allowing numerous people to use one car. In the end, what happens will be a matter of who is willing to fight harder for/against the exemption. [Marketplace]