CUMPRINC

Returns the cumulative principal paid on a loan between start_period and end_period.

If this function is not available, and returns the #NAME? error, install and load the Analysis ToolPak add-in.

On the Tools menu, click Add-Ins.
In the Add-Ins available list, select the Analysis ToolPak box, and then click OK.
If necessary, follow the instructions in the setup program.

Syntax

CUMPRINC(rate,nper,pv,start_period,end_period,type)

Rate is the interest rate.

Nper is the total number of payment periods.

Pv is the present value.

Start_period is the first period in the calculation. Payment periods are numbered beginning with 1.

End_period is the last period in the calculation.

Type is the timing of the payment.

Type	Timing
0 (zero)	Payment at the end of the period
1	Payment at the beginning of the period

Remarks

Make sure that you are consistent about the units you use for specifying rate and nper. If you make monthly payments on a four-year loan at an annual interest rate of 12 percent, use 12%/12 for rate and 4*12 for nper. If you make annual payments on the same loan, use 12% for rate and 4 for nper.
Nper, start_period, end_period, and type are truncated to integers.
If rate ≤ 0, nper ≤ 0, or pv ≤ 0, CUMPRINC returns the #NUM! error value.
If start_period < 1, end_period < 1, or start_period > end_period, CUMPRINC returns the #NUM! error value.
If type is any number other than 0 or 1, CUMPRINC returns the #NUM! error value.

Example

The example may be easier to understand if you copy it to a blank worksheet.

Create a blank workbook or worksheet.
Select the example in the Help topic. Do not select the row or column headers.

Selecting an example from Help
Press CTRL+C.
In the worksheet, select cell A1, and press CTRL+V.
To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Tools menu, point to Formula Auditing, and then click Formula Auditing Mode.

A	B
Data	Description
9.00%	Interest rate per annum
30	Term in years
125,000	Present value
Formula	Description (Result)
=CUMPRINC(A2/12,A3*12,A4,13,24,0)	The total principal paid in the second year of payments, periods 13 through 24 (-934.1071)
=CUMPRINC(A2/12,A3*12,A4,1,1,0)	The principal paid in a single payment in the first month (-68.27827)

Note The interest rate is divided by 12 to get a monthly rate. The years the money is paid out is multiplied by 12 to get the number of payments.