Meaning
An accounting methodology calculates the depreciation expense of a manufacturing asset based on the actual number of cycles or parts it produces rather than the passage of time. This unit of production depreciation aligns the financial cost of specialized tooling with the volume of parts generated, and it does not apply to general office equipment or buildings. It is measured against physical output and allows for flexible accounting during volume fluctuations.
Calculation Formula
The calculation divides the total cost of the tooling, minus its estimated salvage value, by the total expected lifetime output of the asset. This rate per unit is multiplied by the actual number of parts produced during the fiscal period. This method results in higher depreciation charges during periods of peak production.
Operational Advantage
Matching the expense to the production rate prevents the financial distortion that occurs when a factory is running at low capacity. During a market slowdown, the reduced depreciation expense helps protect the operating margin of the plant. This approach ensures that capital costs are directly tied to revenue-generating activities.
Financial Risk
If the product program is cancelled early, the unamortized balance of the asset must be written off immediately. This write-off creates a sudden expense that can hurt the company’s financial results.
