Petrol car and diesel car
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Band
| CO2 emission (g/km)
| 12 months rate
| 6 months rate
| A
| Up to 100
| Not applicable
| Not applicable
| B
| 101-120
| £35.00
| Not applicable
| C
| 121-150
| £120.00
| £66.00
| D
| 151-165
| £145.00
| £79.75
| E
| 166-185
| £170.00
| £93.50
| F
| Over 185
| £210.00
| £115.50
| G
| Over 225 – for cars registered on or after 23/03/06
| £400.00
| £220.00
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Alternative fuel car
 | |  |
 |
Band
| CO2 emission (g/km)
| 12 months rate
| 6 months rate
| A
| Up to 100
| Not applicable
| Not applicable
| B
| 101-120
| £15.00
| Not applicable
| C
| 121-150
| £100.00
| £55.00
| D
| 151-165
| £125.00
| £68.75
| E
| 166-185
| £150.00
| £82.50
| F
| Over 185
| £195.00
| £107.25
| G
| Over 225 – for cars registered on or after 23/03/06
| £385.00
| £211.75
| |
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However this is also set to change in 2009/2010, when the current 7 bands will increase to 13 bands, with a new band over 255g/km, and the highest emitters will have a first year cost of £950, and £455 per year in subsequent years.
For the changes that are planned, click here

Company Car Tax
Then there’s company car tax. From April 2008, again things have changed. A car with 120g/km or less of CO2 emissions will mean significantly less tax. Swapping from an average company car to a car with 120g/km or less of CO2 will mean the employee’s income tax, and the employer’s Class 1A National Insurance, is halved.
Depreciation
Finally, for companies, there’s the accountancy stuff. Until April 2008 vehicles under 120g/km CO2 enjoyed 100% first year capital allowance. From April 2008 it has changed to 100% if it is less than 110g/km CO2. From April 2009 there will be just 10% capital allowance per year for vehicles emitting over 160g/km CO2 – this will result in such vehicle fleets being very expensive.
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