How much gas tax adds to cost of filling up your car in every state?

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Not including the cost of crude oil, taxes are the single largest factor in determining how much Americans pay at the pump. Combined, federal and state taxes add more to the price of a gallon of gas than refining costs, retail markup and transportation expenses.

The federal government and state governments use gasoline taxes to fund road construction and repair. Gasoline taxes also help preserve road conditions by making driving, which wears down on roadways, more expensive.

The federal government levies an 18.4 cent tax on every gallon of gasoline sold in the United States. On top of that, each state imposes its own tax – and in almost every case, the state tax is higher than the federal tax. A handful of states charge more than double the national tax level.

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How much a state chooses to tax a gallon of gas does indeed appear to affect residents’ driving habits. Nationwide, the typical motorist drives 14,318 miles a year. In seven of the 10 states with the lowest gas taxes, people tend to drive more. Meanwhile, people on average drive less in the eight of the 10 states with the highest gas taxes.

To identify the states with the highest and lowest gas taxes, 24/7 Wall St. reviewed state and average local gas taxes from the American Petroleum Institute. Average gas prices as of Jan. 11, 2019 for each state came from AAA’s Daily Fuel Gauge Report. We also reviewed average annual vehicle miles traveled in each state from the Federal Highway Administration.

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43. Louisiana
• State gas tax: 20.0 cents per gallon.
• Gas price as of mid-Jan. 2019: $1.92 per gallon. (5th lowest)
• State taxes as pct. of gas price: 10.4 percent (12th lowest)
• Annual miles traveled per driver: 14,478 (22nd lowest)

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