There are guidelines issued by the Australian Taxation Office (ATO) governing when a change in effective life can or must be made.
For book purposes, you can reassess the effective life any time after the year of acquisition for the asset.
This support note provides guidance on performing these changes.
To change the effective life in the year of acquisition, follow steps 1 to 3 above and edit the value in the Rate/Life field.
The effective life for an asset will not be able to be changed in the following circumstances:
The effect on your depreciation (decline) calculations depends on whether the asset is being depreciated on Diminishing Value or Prime Cost method.
Diminishing Value
If you are using the Diminishing Value method to calculate your depreciation, the new estimate of effective life is used when calculating the decline.
Note: For assets purchased before 10 May 2006 use "1.5" in the formula as shown below. For assetspurchased on or after 10 May 2006 use "2".
The formula is:
Opening Adjustable Value | X | Days held | X | 1.5 |
|
| 365 |
| New effective life (years) |
Example:
$9500 | X | 365 | X | 1.5 | = | $2035.71 |
|
| 365 |
| 7 |
|
|
Prime Cost
If you are using the Prime Cost method, an adjusted formula is used, based on the asset's opening adjustable value and the remaining effective life of the asset.
The formula is:
Opening Adjustable Value plus other improvements | X | Days held | X | 1 |
|
| 365 |
| Remaining effective life (years) |
Example:
Assuming that the asset had an original effective life of 5 years with 3.5 years remaining. The asset's effective life has been reassessed to 7 years (with 5.5 years remaining), effective from the start of the year.
$7800 | X | 365 | X | 1 | = | $1418.18 |
|
| 365 |
| 5.5 |
|
|
This formula is also used if there has been an Adjustment or Second Element of Cost transaction for the asset.