Car tax 2018 - These cars will cost £500 more to tax from April DIESEL car tax will be increasing from April 1st 2018 seeing certain cars costing up to £500 more in Vehicle Excise Duty for the first year. Here are some of the cars to be hit the hardest. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Best used cars on sale in the UK REVEALED - The top second-hand vehicles to snap upVauxhall Combo Life 2018 REVIEW - Road test, price, specs and impressionsChild car seat WARNING - A fifth of parents risking £500 fine for common errorCar value rip-off as more than HALF of sellers losing money on old motorsParking loophole that lets anyone park on your driveway could be closed by new lawNew diesel car prices slashed by up to £17,000 in the UK - but should you buy them?