Authoritative Document is IAS 17 Leases
The suitable technique of amortization or depreciation to require in the case of leasehold property and freehold buildings is straight-line. Since there is no objective basis to find out where one year has advantageous more than from the use of a building and land than any other year.
The main difficulty in the audit of leased assets in the books of the asset of the user is to make sure that a appropriate split has been made among assets within an operating lease and assets within a finance lease. It have to be recognized which there may be a high danger in this area because of the client preferring the asset to be seems as an operating lease as this will remains the asset and the liability about the balance sheet.
The description of a finance lease one within that substantially all dangers and regards of ownership are transferred to the lessee is hard to apply in the practice. The calculations required to determine where a lease is a finance lease can be simply complex and therefore the auditor must make sure that he understands the principals after the calculations and which the assumptions required as e.g. the implicit rate of interest are reasonable. Having understood such principles, a model of the calculations uses to be checked for all leases i.e. involving such the client has designated like operating leases.