Financial.DDB(Double, Double, Double, Double, Double) Method

Reference

Definition

Namespace:: Microsoft.VisualBasic

Assembly:: Microsoft.VisualBasic.Core.dll

Assembly:: Microsoft.VisualBasic.dll

Source:: Financial.vb

Source:: Financial.vb

Source:: Financial.vb

Important

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Returns a value specifying the depreciation of an asset for a specific time period using the double-declining balance method or some other method you specify.

public static double DDB (double Cost, double Salvage, double Life, double Period, double Factor = 2);

static member DDB : double * double * double * double * double -> double

Public Function DDB (Cost As Double, Salvage As Double, Life As Double, Period As Double, Optional Factor As Double = 2) As Double

Parameters

Cost: Double

Required. The initial cost of the asset.

Salvage: Double

Required. The value of the asset at the end of its useful life.

Life: Double

Required. The length of useful life of the asset.

Period: Double

Required. The period for which asset depreciation is calculated.

Factor: Double

Optional. The rate at which the balance declines. If omitted, 2 (double-declining method) is assumed.

Returns

Double

The depreciation of an asset for a specific time period using the double-declining balance method or some other method you specify.

Exceptions

ArgumentException

Factor <= 0, Salvage < 0, Period <= 0, or Period > Life.

Examples

This example uses the DDB function to return the depreciation of an asset for a specified period given the initial cost (InitCost), the salvage value at the end of the asset's useful life (SalvageVal), the total life of the asset in years (LifeTime), and the period in years for which the depreciation is calculated (Depr).

Dim InitCost, SalvageVal, LifeTime, DepYear As Double
Dim Fmt As String = "###,##0.00"

InitCost = CDbl(InputBox("What's the initial cost of the asset?"))
SalvageVal = CDbl(InputBox("Enter the asset's value at end of its life."))
LifeTime = CDbl(InputBox("What's the asset's useful life in years?"))

' Use the SLN function to calculate the deprecation per year.
Dim SlnDepr As Double = SLN(InitCost, SalvageVal, LifeTime)
Dim msg As String = "The depreciation per year: " & Format(SlnDepr, Fmt)
msg &= vbCrLf & "Year" & vbTab & "Linear" & vbTab & "Doubling" & vbCrLf

' Use the SYD and DDB functions to calculate the deprecation for each year.
For DepYear = 1 To LifeTime
    msg &= DepYear & vbTab & 
        Format(SYD(InitCost, SalvageVal, LifeTime, DepYear), Fmt) & vbTab & 
        Format(DDB(InitCost, SalvageVal, LifeTime, DepYear), Fmt) & vbCrLf
Next
MsgBox(msg)

Remarks

The double-declining balance method computes depreciation at an accelerated rate. Depreciation is highest in the first period and decreases in successive periods.

The Life and Period arguments must be expressed in the same units. For example, if Life is given in months, Period must also be given in months. All arguments must be positive numbers.

The DDB function uses the following formula to calculate depreciation for a given period:

Depreciation / Period = ((Cost - Salvage) * Factor) / Life

Applies to

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