What this calculator does
Calculate accelerated depreciation using the sum-of-the-years-digits method and create a full schedule.
How it works
The calculator evaluates year k depreciation = (cost − salvage) × (life − k + 1) ÷ [life(life+1)/2]. 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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?selectedYear=Year to inspectNumber · Required · Default: 1
Outputs
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selectedYearDepreciationSelected-year depreciationCurrency · Primary output
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sumOfYearsSum-of-years denominatorWhole number
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totalDepreciationTotal depreciationCurrency
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endingBookValueEnding book valueCurrency
Inputs and results
The inputs are Asset cost, Salvage value, Useful life in years, Year to inspect. Results include Selected-year depreciation, Sum-of-years denominator, Total depreciation, Ending book value.
Important notes
Accounting and tax depreciation rules can differ. This schedule is an educational estimate.