For the purposes of this Part, the tax written-down value of an intangible fixed asset to which section 729 (writing down on accounting basis) applies is the cost of the asset recognised for tax purposes, less the total net debits brought into account for tax purposes previously in respect of the asset.

For the purposes of subsection (1) the cost of the asset recognised for tax purposes is the same as the amount of the expenditure on the asset that is capitalised for accounting purposes.

Subsection (2) is subject to any adjustments required by this Part or F1Part 4 of TIOPA 2010 (provision not at arm's length).

For the purposes of subsection (1) “the total net debits brought into account for tax purposes previously in respect of the asset”, means the total debits so brought into account, less the total credits so brought into account (if any).

In the case of an asset that has been the subject of a part realisation, this section is subject to section 744.

In the case of an asset that has been subject to adjustment on a change of accounting policy, this section is subject to Chapter 15 (adjustments on a change of accounting policy).