About this tool

The benefit in kind from the P11D value and the CO2 band, the tax the driver pays on it at their own rate, the employer's Class 1A on the same figure, the advisory fuel rate for the engine, and whether the cash allowance would have left the driver better off. You type the list price, the band, the fuel and the rate; the sheet works HMRC's own steps in front of you and asks for nothing else.

Carbikly is a small piece of software for the people who have to work out what a company car costs in the United Kingdom: the employee offered a car or a cash allowance, the director putting a car through