This example returns the number of periods over which payments must be made to pay off a loan whose value is contained in PVal. Also provided are the interest percentage rate per period (APR / 12), the payment (Payment), the future value of the loan (FVal), and a number that indicates whether the payment is due at the beginning or end of the payment period (PayType).

Const ENDPERIOD = 0, BEGINPERIOD = 1 ' When payments are made.

Const MB_YESNO = 4 ' Define Yes/No buttons.

Const ID_NO = 7 ' Define No as a response.

FVal = 0 ' Usually 0 for a loan.

PVal = InputBox("How much do you want to borrow?")

APR = InputBox("What is the annual percentage rate of your loan?")

If APR > 1 Then APR = APR / 100 ' Ensure proper form.

Payment = InputBox("How much do you want to pay each month?")

PayType = MsgBox("Do you make payments at the end of month?", MB_YESNO)

If PayType = ID_NO Then PayType = BEGINPERIOD Else PayType = ENDPERIOD

TotPmts = NPer(APR / 12, -Payment, PVal, FVal, PayType)

If Int(TotPmts) <> TotPmts Then TotPmts = Int(TotPmts) + 1

MsgBox "It will take you " & TotPmts & " months to pay off your loan."