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Multi-Method Depreciation Calculator — result sheet
Compare straight-line, double-declining-balance, and sum-of-the-years-digits book depreciation for a depreciable asset.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Depreciable base = cost − salvage. Straight-line expense = base ÷ life. Double-declining expense = minimum of beginning book value × 2 ÷ life and beginning book value − salvage. Sum-of-years expense = base × (life − year + 1) ÷ [life × (life + 1) ÷ 2].
This worksheet compares three common book-depreciation patterns for one asset and one selected year. It does not silently choose a tax jurisdiction, recovery convention, half-year rule, component schedule, or impairment policy.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Asset cost — currency units; minimum 0.01; maximum 1000000000000
- Salvage value — currency units; minimum 0; maximum 1000000000000
- Useful life — years; minimum 1; maximum 100
- Year to inspect — year; minimum 1; maximum 100
- Book method — 3 choices
Worked example
| Input | Value |
|---|---|
| Asset cost | 50000 |
| Salvage value | 5000 |
| Useful life | 5 |
| Year to inspect | 1 |
| Book method | straight-line |
A 50,000 asset with 5,000 salvage value has a 45,000 depreciable base; straight-line depreciation is 9,000 in year 1 and the ending book value is 41,000.
Assumptions and limits
- Cost and salvage value use the same currency and accounting basis.
- Salvage value cannot exceed the asset cost.
- Useful life is entered as a whole number of years for the schedule comparison.
- The selected year is within the stated useful life.
- Straight-line allocates the depreciable base evenly across years.
- Double-declining balance uses twice the straight-line rate and never reduces book value below salvage.
- Sum-of-the-years-digits weights earlier years more heavily and never changes the depreciable base.
- This is book-depreciation arithmetic, not a tax filing or accounting-policy decision.
- Residual value, impairment, disposals, additions, and componentization are not inferred.
- Rounding for a real ledger should follow the organization’s documented policy rather than the display precision.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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