Establishing the correct company car tax rates and car fuel benefits are absolutely essential. Below we have created a very easy to use company car tax calculator. Simply select the make and model of car in question and a fuel type and then the variant, any capital or annual contributions. You can also include any additional equipment added to the car and then click "calculate". The resulting table will list pertinent information such as P11D value, percentage charge, benefit in kind, tax payable as well as VED, emissions and corporation tax WDA. This is crucial information for both an employer and employee.