What this calculator does
Calculate a fixed declining-balance depreciation rate and annual schedule that approaches salvage value.
How it works
The calculator evaluates fixed rate = 1 − (salvage ÷ cost)^(1/life); first and final years are prorated when applicable. Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
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?cost=Asset costMoney · Required · Default: 50,000
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?salvageValue=Salvage valueMoney · Required · Default: 5,000
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?usefulLife=Useful life in yearsNumber · Required · Default: 8
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?firstYearMonths=Months in first yearNumber · Required · Default: 12
Outputs
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fixedRateFixed declining ratePercentage · Primary output
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firstYearDepreciationFirst-year depreciationCurrency
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totalDepreciationTotal scheduled depreciationCurrency
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endingBookValueEnding book valueCurrency
Inputs and results
The inputs are Asset cost, Salvage value, Useful life in years, Months in first year. Results include Fixed declining rate, First-year depreciation, Total scheduled depreciation, Ending book value.
Important notes
Book and tax depreciation conventions can differ. This schedule is an educational estimate.