Fleet News

120g/km: critical changes to the way your vehicles are taxed


Choosing cleaner vehicles isn’t just good for the environment, its great for the balance sheet as millions of pounds of incentives are now directed at firms with cars that hit key CO2 targets.

In this summary, we identify the major areas where less CO2 means more savings.


Company car drivers who benefit from free fuel for private mileage will pay tax based on a value of £16,900 for the 2008/09 tax year, up from £14,400 for 2007/08.

Drivers pay tax (either 20% or 40% from 2008/09) on a percentage of this value according to the CO2 emissions of their cars.

The taxable amount has now reached such a level that it is the equivalent to having a well-specified second company car.

The advice of most experts is to ditch free fuel and reimburse for business fuel at the HM Revenue & Customs Approved Mileage Rates, as only those with the highest private mileages will see any benefit.


Capital allowances allow companies to offset the cost of items used in the running of their business against their tax bill.

Currently, capital allowances on company cars work in two ways, with vehicles under £12,000 written down in a general pool, while vehicles of £12,000 and over are treated individually and their annual writing down allowance is capped at £3,000.

When cars costing over £12,000 are leased, a proportion of their rentals is disallowed up to a maximum of 25%.

But from April 1, 2009 for corporation tax purposes (April 6 for income tax) the capital allowance treatment will be reformed.

Expenditure on cars with CO2 emissions above 160g/km will attract a 10% Writing Down Allowance (WDA) and expenditure on cars with of 160g/km or below will attract 20% WDA.

The rules affecting leased carsare reformed in line with the new capital allowances rules.

From April 2009, leased cars emitting more than 160g/km will have 15% of the relevant payments disallowed.

Cars at or below 160g/km have no disallowance.

Details are still being finalised, but the move means that vehicles producing CO2 at 160g/km or less are suddenly much more tax efficient for a company, as more of their value can be offset against tax more quickly.

In addition to this, the 100% first year allowance for the cleanest cars will be extended from March 31, 2008 to March 31, 2013.

The qualifying CO2 emissions threshold will be reduced to 110g/km.


From October 27 changes to the London congestion charge will offer a 100% discount to cars that emit 120g/km of CO2 or less.


Benefit-in-kind tax for company cars is based on CO2.

Drivers pay tax at their higher rate (20% or 40% from 2008/09) on a percentage of the value of the car based on a table of CO2 emission figures.

So the more you pollute, the more you pay.

From April 6, a new 10% tax band has been introduced for cars producing 120g/km or less, with a 3% supplement for diesels.

Just a few years ago, this would have condemned drivers to a life of misery on the motorways in a city car, but technology has moved on so quickly that drivers can opt for larger cars and still enjoy low taxes.

Watch out for new launches that hit this benchmark over the next 12 months, including some cars for which figures weren’t available at the time of going to press, such as the Hyundai i10 and SEAT Leon Ecomotive.

Drivers can also enjoy savings by opting for hybrids which have some of the lowest emissions.

Employers pay Class 1 A National Insurance Contributions (NIC) on the value of the benefit employees receive.

Therefore, if employees cut their tax bill by choosing low-emission cars, the employer benefits, too. In many cases, switching to a low-emission fleet can slash NIC costs by thousands of pounds.

No announcement has been made by the Government on how long this special rate will last, although there are suggestions that it could be reduced to 110g/km in future Budgets. 

Tax bands 2008/09
CO2 in g/km* Petrol Diesel
120 and below 10% 13%
121 to 139 15% 18%
140 16% 19%
145 17% 20%
150 18% 21%
155 19% 22%
160 20% 23%
165 21% 24%
170 22% 25%
175 23% 26%
180 24% 27%



Tax bands 2008/09 (cont)
CO2 in g/km* Petrol Diesel
185 25% 28%
190 26% 29%
195 27% 30%
200 28% 31%
205  29% 32%
210 30% 33%
215 31% 34%
220 32% 35%
225 33% 35%
230 34% 35%
235 35% 35%


* Bands remain the same for 2009/10 but in 2010/11 the 15% band will move down 5g/km along with all bands above it, meaning the starting rate for the tax will be 130g/km.


The humble tax disc is at the frontline of the battle against CO2 emissions.

The Government already encourages buyers to opt for cleaner cars with increased road tax bills for higher polluting cars, but from next year it will take a tougher approach.

New first year penalties and incentives will be introduced which slash road tax to zero for some of the cleanest vehicles, but push it up to nearly £1,000 for the highest polluters.

In future years, this banding system will be used to spread the financial gap between the cleanest and thirstiest models on the roads.

VED: current system
CO2 emissions (g/km) 2008-09 tax Tax band
Up to 100 £0 A
101-120 £35 B
121-150 £120 C
151-165 £145 D
166-185 £170 E
Over 186 £210 F
Over 226 £400 G


VED: 2010 to 2011

CO2 (g/km) 2009-2010 1st year 2nd year & after Band
Up to 100 £0 £0 £0 A
101-110 £20 £0 £20 B
111-120 £30 £0 £35 C
121-130 £90 £0 £95 D
131-140 £110 £115 £115 E
141-150 £120 £125 £125 F
151-160 £150 £155 £155 G
161-170 £175 £250 £180 H
171-180 £205 £300 £210 I
181-200 £260 £425 £270 J
201-225 £300 £550 £310  K
226-255 £415 £750 £430  L
Over 255 £440 £950 £455 M





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