# FV Function

**Visual Studio 2008**

Returns a Double specifying the future value of an annuity based on periodic, fixed payments and a fixed interest rate.

Function FV( _ ByVal Rate As Double, _ ByVal NPer As Double, _ ByVal Pmt As Double, _ Optional ByVal PV As Double = 0, _ Optional ByVal Due As DueDate = DueDate.EndOfPeriod _ ) As Double

An annuity is a series of fixed cash payments made over time. An annuity can be a loan (such as a home mortgage) or an investment (such as a monthly savings plan).

The Rate and NPer arguments must be calculated using payment periods expressed in the same units. For example, if Rate is calculated using months, NPer must also be calculated using months.

For all arguments, cash paid out (such as deposits to savings) is represented by negative numbers; cash received (such as dividend checks) is represented by positive numbers.

This example uses the FV function to return the future value of an investment given the percentage rate that accrues per period (APR / 12), the total number of payments (TotPmts), the payment (Payment), the current value of the investment (PVal), and a number that indicates whether the payment is made at the beginning or end of the payment period (PayType). Note that because Payment represents cash paid out, it is a negative number.

Sub TestFV() Dim TotPmts As Integer Dim Payment, APR, PVal, Fval As Double Dim PayType As DueDate Dim Response As MsgBoxResult ' Define money format. Dim Fmt As String = "###,###,##0.00" Payment = CDbl(InputBox("How much do you plan to save each month?")) APR = CDbl(InputBox("Enter the expected interest annual percentage rate.")) ' Ensure proper form. If APR > 1 Then APR = APR / 100 TotPmts = CInt(InputBox("For how many months do you expect to save?")) Response = MsgBox("Do you make payments at the end of month?", MsgBoxStyle.YesNo) If Response = MsgBoxResult.No Then PayType = DueDate.BegOfPeriod Else PayType = DueDate.EndOfPeriod End If PVal = CDbl(InputBox("How much is in this savings account now?")) Fval = FV(APR / 12, TotPmts, -Payment, -PVal, PayType) MsgBox("Your savings will be worth " & Format(Fval, Fmt) & ".") End Sub

Namespace: Microsoft.VisualBasic

Module: Financial

Assembly: Visual Basic Runtime Library (in Microsoft.VisualBasic.dll)