Buying road tax for your car used to be a fairly simple affair. The road tax band was calculated by the size of your car's engine. These days, however, with concerns for the environment growing car road tax is predominately calculated by assessing your car's CO2 emission levels. A cars Registration Document/Certificate (also known as the Logbook) will have details of its CO2 emissions.

From April 10 2010 new and used cars, those registered after 01-03-2001, will also be taxed differently. Cars registered before 01-03-2001 will have a separate road tax charge.

Road Tax Rates For New Cars

Vehicle Excise Duty (VED) Band	CO2 Emissions (g/km)	2010 first-year rate	2010 1st year alternative fuel rate
A	Up to 100	£0	£0
B	101 - 110	£0	£0
C	111 -120	£0	£0
D	121 -130	£0	£0
E	131-140	£110	£100
F	141-150	£125	£115
G	151 -165	£155	£145
H	166 -175	£250	£240
I	176 - 185	£300	£290
J	186 - 200	£425	£415
K	201- 225	£550	£540
L	226 - 255	£750	£740
M	Over 255	£950	£940

Road Tax Rates For Non-New Cars

VED Band	CO2 Emissions (g/km)	2010-11 standard rate
A	Up to 100	£0
B	101 - 110	£20
C	111 -120	£30
D	121 -130	£90
E	131-140	£110
F	141-150	£125
G	151 -165	£155
H	166 -175	£180
I	176 - 185	£200
J	186 - 200	£235
K	201- 225	£245
L	226 - 255	£425
M	Over 255	£435

Cars registered before 1 March 2001?

Engine size (cc)	2010-11
below 1549cc	£125
Over 1549cc	£205