Free fuel provided to an employee by the employer is taxable based on a fuel scale charge calculated by reference to vehicle engine size and fuel type (petrol or diesel) as follows:

You can use this calculator not only to calculate the amount of tax that you are paying in respect of this benefit-in-kind but also to see if the benefit itself is worth it.

For example if you have a very low private mileage you may find that you are paying more in tax than you would pay for fuel!

The calculator assesses the break-even mileage required to justify this benefit in kind - if the break-even mileage is more than your actual mileage this is not of benefit to you.