Returns the principal payment for a given period of an annuity based on periodic, constant payments and a constant interest rate.
PPmt(rate, per, nper, pv[, fv[, type]])
The PPmt function has these named arguments:
|
Part |
Description |
|
rate |
Interest rate per period. For example, if you get a car loan at an annual percentage rate (APR) of 10 percent and make monthly payments, the rate per period is 0.1/12, or 0.0083. |
|
per |
Payment period in the range 1 through nper. |
|
nper |
Total number of payment periods in the annuity. For example, if you make monthly payments on a four-year car loan, your loan has a total of 4 * 12 (or 48) payment periods. |
|
Part |
Description |
|
pv |
Present value, or value today, of a series of future payments or receipts. For example, when you borrow money to buy a car, the loan amount is the present value to the lender of the monthly car payments you will make. |
|
fv |
Future value or cash balance you want after you’ve made the final payment. For example, the future value of a loan is $0 because that’s it value after the final payment. However, if you want to save $50,000 for your child’s education over 18 years, then $50,000 is the future value. If omitted, 0 is assumed. |
|
type |
Number indicating when payments are due. Use 0 if payments are due at the end of the payment period, or use 1 if payments are due at the beginning of the period. If omitted, 0 is assumed. |
An annuity is a series of constant cash payments made over a period of time. An annuity can be a loan (such as a home mortgage) or an investment (such as a monthly savings plan).
The arguments rate and nper 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 PPmt function to calculate how much of a payment for a specific period is principal when all the payments are of equal value. Given are the interest percentage rate per period (APR / 12), the payment period for which the principal portion is desired (Period), the total number of payments (TotPmts), the present value or principal of the loan (PVal), 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.= Chr(13) & Chr(10) ' Define newline.= Chr(9) ' Define tab.= "###,###,##0.00" ' Define money format.= 0 ' Usually 0 for a loan.= InputBox("How much do you want to borrow?")= InputBox("What is the annual percentage rate of your loan?")APR > 1 Then APR = APR / 100 ' Ensure proper form.= InputBox("How many monthly payments do you have to make?")= MsgBox("Do you make payments at the end of month?", vbYesNo)PayType = vbNo Then PayType = BEGINPERIOD Else PayType = ENDPERIOD= Abs(-Pmt(APR / 12, TotPmts, PVal, FVal, PayType))= "Your monthly payment is " & Format(Payment, Fmt) & ". "= Msg & "Would you like a breakdown of your principal and "= Msg & "interest per period?"= MsgBox(Msg, vbYesNo) ' See if chart is desired.MakeChart <> vbNo Then
If TotPmts > 12 Then MsgBox "Only first year will be shown."
Msg = "Month Payment Principal Interest" & NL
For Period = 1 To TotPmts
If Period > 12 Then Exit For ' Show only first 12.
P = PPmt(APR / 12, Period, TotPmts, -PVal, FVal, PayType)
P = (Int((P + .005) * 100) / 100) ' Round principal.
I = Payment - P
I = (Int((I + .005) * 100) / 100) ' Round interest.
Msg = Msg & Period & TB & Format(Payment, Fmt)
Msg = Msg & TB & Format(P, Fmt) & TB & Format(I, Fmt) & NL
Next Period
MsgBox Msg ' Display amortization table.If