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Capital allowances

Capital allowances give a taxpayer relief for certain types of capital expenditure, as shown in the table below.

Capital allowance rates

The following capital allowances apply.

Capital typeAllowance rate
Machinery and plant, normal rate25%Reducing balance
Machinery and plant, first year allowance *150%Permanent allowance
Machinery and plant, long life assets *26%Reducing balance
Motor cars25%Reducing balance (max £3,000 pa)
Low emission and electric cars100%Cars registered on or after 17th April 2002
Industrial buildings and qualifying hotels4%Of cost per annum
Commercial/industrial buildings in an enterprise zone100%
Agricultural buildings4%Of cost per annum
Scientific research100% 
Know how25%Reducing balance
Patent rights25%Reducing balance
Cars with low carbon dioxide emissions (not more than 120 gm/km driven) *3100% 
Natural gas and hydrogen refuelling equipment *3100% 
Water efficient investments *4100% 

Notes:

*1 Applies to small and medium sized businesses (as defined by the Companies Act). Cars and certain other assets are excluded. Rate normally 40%, increased to 50% for 1 year from 6 April 2006.
*2 Assets with a working life of 25 years or more unless expenditure on such assets is below £100,000 in the period.
*3 On expenditure between 17th April 2002 and 31 March 2008.
*4 On expenditure from 1 April 2003.


100% first year capital allowances will be introduced for:
  • new low emission cars registered on or after 17 April 2002, and
  • plant and machinery to refuel vehicles with natural gas or hydrogen fuel.
These allowances will apply to expenditure incurred between 17 April 2002 and 1 April 2008.

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