Gas Taxes in the U.S.: Federal and State Taxes per Gallon
The federal gas and diesel tax, how state taxes differ, and why taxes explain part of the price gap between states.
Updated October 8, 2026
📊 U.S. national averages · EIA week of Nov 9, 2026
Every gallon of fuel sold at U.S. pumps carries a federal excise tax: 18.4¢ per gallon for gasoline and 24.4¢ for diesel. These rates have not changed since 1993 and fund the Highway Trust Fund.
State taxes vary widely
States add their own excise taxes and fees, and some also apply sales taxes or environmental fees. California and Pennsylvania have some of the highest totals, while Alaska has one of the lowest. Texas has charged 20¢ per gallon since 1991.
Local taxes
Some counties and cities add local option taxes, which is why prices can differ across a county line.
Where to check current rates
See all 50 states and D.C. in one table on our gas tax by state 2026 page (rates effective July 1, 2026). The American Petroleum Institute also publishes a state-by-state summary of motor fuel taxes, and the EIA explains how taxes fit into the pump price.
Frequently asked questions
Is the federal gas tax a percentage?
No, it is a fixed amount per gallon, so it does not rise when prices rise.