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 October 1, 1993 and is not indexed to inflation, which increased by a total of 77 percent from 1993 until 2020. On average, as of April 2019, state and local taxes and fees add 34.24 cents to gasoline and 35.89 cents to diesel, for a total US volume-weighted average fuel tax of 52.64 cents per gallon for gas and 60.29 cents per gallon for diesel.
== State taxes ==
The first US state tax on fuel was introduced on February 25, 1919 in Oregon. It was...