Company car tax bands explained
How big a bite depends on three things: the P11D cost of the car (this is its list price plus options, but minus on-the-road charges and any capital contributions you make towards the car), the amount of CO2 that it emits, and your personal income tax band.
Once you've got these pieces of information you can use the table below to see how much the car will cost you each month. You can see from the table how costs increase each year as the CO2 levels ratchet back.
Multiply the P11D value of the car by the benefit-in-kind percentage that it's subject to based on its CO2 output. This is the proportion of the car's value that you'll be taxed on based on your personal income tax band, so multiply that by 20%, 40% or 50% as appropriate.
If you don't want to pay anything at all, you'll need to get a fully electric battery-powered car. These are totally exempt from the charges until 2015. Cars emitting less than 75g/km will be subject to tax based on 5% of their value until 2015.