F1Part 3 Industrial buildings allowances
Chapter 6 Writing-down allowances
310 Basic rule for calculating amount of allowance
(1)
The basic rule is that the writing-down allowance for a chargeable period is—
(a)
in the case of qualifying enterprise zone expenditure, 25% of the expenditure, and
(b)
in the case of other qualifying expenditure, 4% of the expenditure.
(2)
The allowance is proportionately increased or reduced if the chargeable period is more or less than a year.
(3)
This basic rule does not apply if section 311 applies.