The Excel PPMT function calculates the payment on the principal, during a specific period of a loan or investment that is paid in constant periodic payments, with a constant interest rate.
|rate||-||The interest rate, per period|
|per||-||The period for which the payment on the principal is to be calculated (must be an integer between 1 and nper)|
|nper||-||The number of periods over which the loan or investment is to be paid|
|pv||-||The present value of the loan / investment|
|[fv]||-||If omitted, [fv] takes on the default value of 0|
|[type]||-||If the type argument is omitted, it takes on the default value of 0 (denoting payments made at the end of the period).|
Cash Flow Convention :Note that, in line with the general cash flow convention, outgoing payments are represented by negative numbers and incoming payments are represented by positive numbers. This is seen in the examples below.
In each of the examples below, the spreadsheet on the left shows the format of the Ppmt function, and the spreadsheet on the right shows the result.
The following spreadsheet shows the Excel Ppmt function used to calculate payment on the principal, in months 1 and 2 on a loan of $50,000 which is to be paid off in full after 5 years. Interest is charged at a rate of 5% per year and the payment to the loan is to be made at the end of each month.
Note that in this example :
In this example, the spreadsheet below shows the Excel Ppmt function being used to calculate the payment on the principal, during quarters 1 and 2, on a loan of $10,000 that is to be reduced to $5,000 over a period of 2 years, by a series of constant quarterly payments. Interest is charged at a rate of 3.5% per year and the payment is to be made at the beginning of each quarter.
Note that, in this example :
Further examples of the Excel Ppmt function can be found on the Microsoft Office website.
If you get an error from the Excel Ppmt function, this is likely to be one of the following:
|#NUM!||-||Occurs if the supplied per argument is < 0 or is > the supplied value of nper|
|#VALUE!||-||Occurs if any of the supplied arguments are not recognised as numeric values|
Also, the following problem is encountered by some users:
The result from the Excel Ppmt function is much higher or much lower than expected.
Many users, when calculating monthly or quarterly payments, forget to convert the interest rate or the number of periods to months or quarters.
|months||=||12 * years;||monthly rate||=||annual rate / 12|
|quarters||=||4 * years;||quarterly rate||=||annual rate / 4|