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Syntax
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DDB
(Cost, Salvage, Life, Period)
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Description
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Calculates the depreciation of an asset for a specified Period of time using the double-declining balance method.
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Comments
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The double-declining balance method calculates the depreciation of an asset at an accelerated rate. The depreciation is at its highest in the first period and becomes progressively lower in each additional period.
DDB
uses the following formula to calculate the depreciation:
DDB = ((Cost – Total_depreciation_from_all_other_periods) * 2) / Life
The
DDB
function uses the following parameters:
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Parameter
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Description
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Cost
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Double representing the initial cost of the asset.
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Salvage
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Double representing the estimated value of the asset at the end of its predicted useful life
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Life
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Double representing the predicted length of the asset's useful life
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Period
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Double representing the period for which you wish to calculate the depreciation
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Life and Period must be expressed using the same units. For example, if Life is expressed in months, then Period must also be expressed in months.
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Example
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This example calculates the depreciation for capital equipment that cost $10,000, has a service life of ten years, and is worth $2,000 as scrap. The dialog box displays the depreciation for each of the first four years.
Const crlf = Chr$(13) + Chr$(10)
Sub Main()
s$ = "Depreciation Table" & crlf & crlf
For yy = 1 To 4
CurDep# = DDB(10000.0,2000.0,10,yy)
s$ = s$ & "Year " & yy & " : " & CurDep# & crlf
Next yy
MsgBox s$
End Sub
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See Also
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Sln (function); SYD (function).
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