The rules for taxing petrol company cars apply equally to diesel cars, but the latter are then subject to further adjustment.
The taxable benefit arising on a car is, broadly, calculated using the car’s full manufacturer’s published UK list price, including the full value of any accessories. This figure is multiplied by the ‘appropriate percentage’, which can be found by reference to the car’s CO2 emissions level using HMRC’s ready reckoner. This will give the taxable value of the car benefit.
For cars that are ‘propelled solely by diesel’,…
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