Original cost
$12,000
Accumulated depreciation
$0
Carrying amount
$12,000
The asset illustration never changes — depreciation allocates cost, it doesn't measure wear or market value.
Timeline
Depreciation for year 1
Annual straight-line depreciation = (cost − residual value) ÷ useful life.
Straight-line method, whole months, no GST or income tax. Residual value and useful life are estimates set by the business.