ATO depreciation rates for extension ladders, trestles and planks) assets in the General industry, under Income Tax (Effective Life of Depreciating Assets) Determination 2025 (LI 2025/20).
3 assets listed.
| Asset | Effective life | Prime cost rate | Diminishing value rate | Applicable from |
|---|---|---|---|---|
| Aluminium | 4 years | 25.00% | 50.00% | 1 July 2025 |
| Fibreglass | 4 years | 25.00% | 50.00% | 1 July 2025 |
| Portable structures (sheds, site office trailers, portable toilets and washrooms etc) used for a temporary period in offsite locations (e.g. construction sites) | 10 years | 10.00% | 20.00% | 1 July 2025 |
The effective lives shown above are determined by the Commissioner of Taxation under section 40-100 of the Income Tax Assessment Act 1997. The diminishing value rate equals 200% ÷ effective life (for assets acquired on or after 10 May 2006). The prime cost rate equals 100% ÷ effective life. You may alternatively self-assess effective life — see the ATO website for guidance.