First, find the effective life of the asset



Commissioner’s Effective Life Tables
Tax YearRuling (download links)
2020-21TR2020/3
2019-20TR 2019/5
2018-19TR 2018/4
2017-18TR 2017/2
2016-17TR 2016/1
2015-16TR 2015/2
2014-15TR 2014/4
2013-14TR 2013/4
2012-13TR 2012/2
2011-12TR 2011/2





Prime cost

depreciated evenly across the effective life. 

Asset’s cost × (days held ÷ 365) × (100% ÷ asset’s effective life) 
Last modified: 07 Apr 2020 QC 45984



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Diminishing value

  • 50% of the asset you can claim immediately, and then you get half of the closing balance of each year thereafter (see excel below)
  • Once it reaches $2 balance then it will end with 2 more payments
Normally:
Base value × (days held ÷ 365) × (200% ÷ asset’s effective life) 

If you started to hold the asset before 10 May 2006, the formula for the diminishing value method is:
Base value × (days held ÷ 365) × (150% ÷ asset’s effective life)
Last modified: 07 Apr 2020 QC 45984


















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Reference