President Trump has proposed to boost the federal gasoline tax—potentially the first increase in the 18.4-cents-a-gallon tax since 1993 – by 25 cents a gallon. Raising the gas tax would generate hundreds of billions of dollars from drivers to support infrastructure spending. How much would it cost you every year? MAP: State Gas Taxes Across the Country The answer depends on how much you drive and how much gas your current vehicle uses. Our simple gas tax calculator below will show you how much your annual fuel bill would go up if the federal gas tax is increased by 25 cents. Plus, discover how much additional MPG your car would need to offset the extra costs. The proposed 25¢ per gallon increase to the gas tax would add 0000.00 to your current gas bill of $0.00 per year You could offset that extra cost by getting... MPG See Kiplinger's picks for fuel-efficient new cars » Click inside the boxes to change default numbers. Overall MPG of your car Number of milesyou drive per year Price per gallonCheck gas prices in your area » Go START OVER » SEE ALSO: Guide to Taxes in Every State » Sources: University of Michigan Transportation Research Institute (avg. sales-weighted MPG for 2015 models = 24.8); Federal Highway Administration (avg. annual mileage per vehicle = 13,476); AAA (average price of regular gas as of 2/15/18 = $2.55)