Gasoline Tax Rates by State

The Federal Excise Tax on motor gasoline is 18.4 cents per gallon for all states. Each state applies additional taxes which vary from state to state. As of July 2010, Alaska had the lowest overall tax rate for gasoline at 26.4 cents per gallon while California had the highest tax rate at 67.4 cents per gallon. The national average was 47.7 cents per gallon.