After crude oil costs, gasoline taxes are the second largest contributor to the price paid at the pump. Together Federal and State excise taxes on fuel account for an average cost of approximately 62 cents per gallon. That's a combined tax of about 20% per gallon of gas.



The federal tax per gallon is 18.4 cents per gallon,

see the history of federal gasoline taxes here

, and the state tax per gallon varies by state,

see the complete list of state gasoline taxes here