On 28 June 2017, the Australian Taxation Office issued Taxation Ruling (TR) 2017/2 on the effective life of depreciating assets. Under Australian depreciation rules, taxpayers may choose to use the Commissioner's determination of the effective life of a depreciating asset as included in tables A and B of TR 2017/2 or choose to make their own estimate. Table A lists the effective life for industry specific assets and Table B lists the effective life for general assets.
For the use of the listed effective lives, if a depreciating asset is first used or installed ready for use within five years of entering into the contract to acquire the asset, beginning construction of the asset, or otherwise acquiring the asset (relevant time), then the effective life is that which was in force at the relevant time. If an asset is not used or installed ready for use within five years, then the effective life is that which was in force at the time of first use or installed ready for use.