<P> The United States federal excise tax on gasoline is 18.4 cents per gallon and 24.4 cents per gallon for diesel fuel . The federal tax was last raised in 1993 and is not indexed to inflation , which increased by a total of 64.6 percent from 1993 until 2015 . 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 . </P>
<P> The United States federal excise tax on gasoline is 18.4 cents per gallon and 24.4 cents per gallon for diesel fuel . The federal tax was last raised in 1993 and is not indexed to inflation , which increased by a total of 64.6 percent from 1993 until 2015 . 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 . </P>
when was the federal gas tax last raised
when was the federal gas tax last raised
1993
1993