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Accounting policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Accounting policies |
Schedule of information used for significant estimates | ​
Policy |  | Judgment |  | Estimate |  | Further information
Deferred tax | ​ | Determination of whether sufficient taxable profits will be generated in future years to recover DTA. | ​ | Our estimates are based on the five-year revenue and cost forecasts (which include inherent uncertainties). | ​ | Note 7
Fair value – financial instruments | ​ | Classification of a fair value instrument as level 3, where the valuation is driven by unobservable inputs. | ​ | Estimation of the fair value, where it is reasonably possible to have alternative assumptions in determining the FV. | ​ | Note 11
Loan impairment provisions | ​ | Definition of default against which to apply PD, LGD and EAD models. Criteria for a significant increase in credit risk. Identification of risks not captured by the models. | ​ | ECL estimates contain a number of measurement uncertainties (such as the selection of multiple economic scenarios) and disclosures include sensitivities to show impact on other reasonably possible scenarios. | ​ | Note 15
Provisions for liabilities and charges | ​ | Determination of whether a present obligation exists in respect of customer redress, litigation and other regulatory, property and other provisions. Legal proceedings often require a high degree of judgment and these are likely to change as the matter progresses. | ​ | Provisions remain sensitive to the assumptions used in the estimate. We consider a wide range of possible outcomes. It is often not practical to meaningfully quantify ranges of possible outcomes, given the uncertainties involved. | ​ | Note 21
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Schedule of estimated useful economic lives | ​
Computer software | 3 to 12 years
Other acquired intangibles | 5 to 10 years
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