Tangible assets used in business operations for longer than one year are valued at cost less regular straight-line depreciation. The cost of production includes all costs directly attributable to the manufacturing process as well as appropriate portions of the indirect costs relating to this process. Borrowing costs in close connection with the financing of the purchase or production of a qualifying asset are also capitalised. In the reporting period borrowing costs of EUR 8m (previous year: EUR 2m) were capitalised. The useful lives applied to tangible assets correspond to their estimated/expected useful lives in the Group.
New aircraft and spare engines are depreciated over a period of twelve years to a residual value of 15 per cent.
A useful life of between 20 and 45 years is assumed for buildings, whereby buildings, fixtures and fittings on rented premises are depreciated according to the terms of the lease or over a shorter useful life. Depreciation rates are mainly between 10 and 20 per cent per annum. A useful life of up to ten years is fixed for plant and machinery. Operating and office equipment is depreciated over three to ten years in normal circumstances.
Assets acquired second-hand are depreciated over their expected remaining useful life.