5. Intangible assets and goodwill
Intangible assets that are acquired by the Group are stated at cost less accumulated amortisation and impairment losses. Amortisation is charged to profit or loss using methods that best reflect the economic benefits over their estimated useful economic lives and is included in depreciation and amortisation. The estimated useful economic lives are as follows:
| Core deposit intangibles | 6 to 10 years |
| Other acquired intangibles | 5 to 10 years |
| Computer software | 3 to 5 years |
Expenditure on internally generated goodwill and brands is written-off as incurred. Direct costs relating to the development of internal-use computer software are capitalised once technical feasibility and economic viability have been established. These costs include payroll, the costs of materials and services, and directly attributable overhead. Capitalisation of costs ceases when the software is capable of operating as intended. During and after development, accumulated costs are reviewed for impairment against the projected benefits that the software is expected to generate. Costs incurred prior to the establishment of technical feasibility and economic viability are expensed as incurred as are all training costs and general overhead. The costs of licences to use computer software that are expected to generate economic benefits beyond one year are also capitalised.
Acquired goodwill being the excess of the cost of an acquisition over the Group’s interest in the net fair value of the identifiable assets, liabilities and contingent liabilities of the subsidiary, associate or joint venture acquired is initially recognised at cost and subsequently at cost less any accumulated impairment losses. Goodwill arising on the acquisition of subsidiaries and joint ventures is included in the balance sheet caption ‘Intangible fixed assets’ and that on associates within their carrying amounts. The gain or loss on the disposal of a subsidiary, associate or joint venture includes the carrying value of any related goodwill.
On implementation of IFRS, the Group did not restate business combinations that occurred before January 2004. Under previous GAAP, goodwill arising on acquisitions after 1 October 1998 was capitalised and amortised over its estimated useful economic life. Goodwill arising on acquisitions before 1 October 1998 was deducted from equity. The carrying amount of goodwill in the Group’s opening IFRS balance sheet (1 January 2004) was £13,131 million, its carrying value under previous GAAP.
