From the 1st April 2017 the way Vehicle Excise Duty (VED) is calculated will be changing.
The changes will be calculated on the vehicles CO2 emissions. From the second year onwards, the CO2 scale will no longer apply and the standard annual rate of £140 will take effect. Unless, the customer has a vehicle with zero-emissions then, they will get away with paying nothing at all. However, if a cars list price is over £40,000 at first registration, the customer will have to pay the additional rate of £310 for five years after the end of the first licence. After those five years the customer will be put back onto the standard annual rate.
If your vehicles tax was registered before 1st April 2017 this will not effect you.