CTM02350 | Corporation Tax: capital allowances
From HM Revenue & Customs · Company Taxation Manual
Capital allowances are to be given effect in calculating profits for a chargeable period.
In the tax computation, any capital allowances (including balancing allowances) are deducted and any balancing charges are added in to arrive at the taxable profits.
See to for the specific rules on how to give effect to the allowances and charges for the various different types of business, such as a trade, an investment business or a property business.
See for guidance on the form of claims to capital allowances by companies.