You may have a case where a person who incurs expenditure that qualifies for capital allowances receives a contribution towards that expenditure. If so, the general rule is that the contribution is deducted from the expenditure and the person gets capital allowances on the net amount. There are exceptions to this general rule CA14200.
For this general rule it does not matter if:
Treat a non-returnable grant of money given by way of gift, that
is, not in return for anything, as a contribution if there is a
clear connection between the receipt of the grant and the incurring
of the expenditure. The grant should be specifically related to the
capital expenditure on the provision of capital assets.
The fact that taxpayer applies for and receives a grant after
expenditure on assets on which capital allowances are claimed has
been incurred and paid for does not prevent the grant being
deducted as a contribution (Cyril Lord Carpets Limited v Schofield
42TC637). You should also apply the contributions legislation to a
subsidy or contribution towards expenditure that a person becomes
entitled to after expenditure has been incurred. Do not treat a
loan as a contribution.
European Community (EC) Grants are deducted from expenditure
that qualifies for capital allowances. For example, FEOGA grants
(grants from the EC Agricultural Fund/European Guidance and
Guarantee Fund) are deducted.