Capital Allowances Act 2001 section 97

End of writing-down allowances

Section 97 sets out the circumstances in which writing-down allowances for expenditure on the purchase of patent rights must cease, both for the current period and permanently going forward.

• No writing-down allowance is available for a period in which the patent rights expire without being revived
• No allowance is available where the person sells all of the patent rights (or all they still held at the start of the period)
• No allowance is available where the person sells part of the rights and the capital sale proceeds for the period equal or exceed the remaining unrelieved qualifying expenditure
• Once a writing-down allowance is blocked for a period under any of these rules, no further writing-down allowance can be claimed for that expenditure in any later period