At each balance sheet date there is an assessment as to whether a financial asset or group of financial assets is impaired. Where there is objective evidence that an impairment loss has arisen on assets carried at amortised cost, the carrying amount is reduced with the loss being recognised in the income statement. The impairment loss is measured as the difference between that asset’s carrying amount and the present value of estimated future cash flows discounted at the financial asset’s original effective interest rate. The impairment loss is only reversed if it can be related objectively to an event after the impairment was recognised and is reversed to the extent that the carrying value of the asset does not exceed its amortised cost at the date of reversal.
If an available-for-sale asset is impaired, an amount comprising the difference between its cost (net of any principal payment and amortisation) and its fair value is transferred from equity to the income statement.
Reversals of impairment losses on debt instruments are taken through the income statement if the increase in fair value of the instrument can be objectively related to an event occurring after the impairment loss was recognised in the income statement. Reversals in respect of equity instruments classified as available-for-sale are recognised directly in equity. If there is objective evidence that an impairment loss has been incurred on an unquoted equity instrument that is not carried at fair value because its fair value cannot be objectively measured, or on a derivative asset that is linked to and must be settled by delivery of such an unquoted equity instrument, the amount of loss is measured as the difference between the asset’s carrying amount and the present value of estimated future cash flows discounted at the current market rate of return for a similar financial asset.