Schedules
Schedule 3 Transitionals and savings
Part 9 Patent allowances
Expenditure incurred before 1st April 1986
96 Calculation of writing-down allowances
1
The basic rule for calculating a writing-down allowance for an item of qualifying expenditure is—
where—
E is the amount of the qualifying expenditure;
C is the length of the part of the chargeable period falling within the writing-down period;
W is the length of the writing-down period.
2
The basic rule is subject to the rules about—
a
cessation of writing-down allowances (paragraph 97), and
b
reduced writing-down allowances (paragraph 98).