The list price of the car and the cost of any optional extras.

The amount of any contribution made to the cost of the car (max £5000).

The amount paid to the employer over the whole year for any private use.

The approved CO2 emissions of the vehicle - you can look it up on the offical government website
The fuel type of vehicle

Does your employer pay for any private fuel for a company car?

Note: These calculations are only for illustrative purposes and are not a substitute for professional advice.