how is tax.on gasoline computed
Fuel taxes in the United States. The United States federal excise tax on gasoline is 18.4 cents per gallon and 24.4 cents per gallon for diesel fuel. On average, as of January 2017, state and local taxes and fees add 31.04 cents to gasoline and 31.01 cents to diesel, for a total US average fuel tax of 49.44 cents per gallon for gas and 55.41 cents per gallon for diesel.