Each car falls into a certain tax band depending on how much CO2 it emits. There are 13 tax bands – A to M.

We reveal how much it costs to tax a new or used car in band K.

Band: K
Carbon dioxide emissions: 201-225g/km of CO2

Petrol and diesel cars registered after March 1, 2001

Rate: £215
Next year’s rate: £245
Example car: Porsche Boxster S 3.4-litre petrol

Band K also includes cars which emit more than 225g/km of CO2 but were registered before March 23, 2006.

Alternative-fuel cars*

Rate: £200
Next year’s rate: £235

Cars registered before January 2001

Road tax is calculated according to engine size.

Cars under 1549cc: £125
Next year’s rate: £125

Cars over 1549cc: £190
Next year’s rate: £205

For more prices and bands read our 2009 road tax guide

To find out how much CO2 your car emits, refer to your vehicle handbook or visit Auto Trader’s car reviews.

*These include cars which run on either Liquefied Petroleum Gas (LPG), a mixture of petrol and LPG, or hybrids which run on electricity and fuel.

How much are you paying for car tax? Have your say on the Auto Trader Blog