## Basic Overview

AVAILABLE SINCE 5.3.1

 Description Calculates the number of periods necessary for a recurring investment based on an interest rate, the amount of payment per period, a present value, a future value and either ordinary annuity or annuity due (type) indicating whether payments are due at the beginning or the end of period. Signature NPER('Rate', 'Pmt', 'Pv' [, 'Fv' [, "Type"]]) Parameters Rate -> The interest ratePmt -> Payment (in each period): the amount of each payment made (Payments/costs should (but are not required to) be entered as a negative number e.g. -100)Pv -> Present value:  the current value of the annuityFv  -> [Optional] - Future value: the future value remaining after the final payment has been made.  If not entered, 'Fv' is set to 0.Type -> [Optional] type (1=pmt at beginning of period (Annuity Due), 0=pmt at end of period (Ordinary Annuity)). By default 'Type' is set to 0 Notes Argument 'Pv' is the leading input node. A leading input node is a function argument, for which we assume the levels to be correct. All other input nodes need to have the same dimensionality.Each input node can be single numberProviding all inputs with the same dimensionality results in a noticeable performance improvement Limitations All other inputs can not contain levels that are not in the leading input node 'Pv' . All level values that are in the leading input node 'Pv' , must be in all the other input nodes.

#### Positive Costs/Payments

In case the costs or payments are entered as a positive number within your model, this function needs to be multiplied by (-1).

## Example

 Rate(Interest Rate) 0.045/12 Pmt(Payment per Period - Amount) -100 Pv(Present Value) 5000 Fv(Future Value) 0 TypePayment at Beginning of Period (Annuity Due) = 1Payment at End of Period (Ordinary Annuity) = 0 0 Valsight Formula NPER(Rate, Pmt, Pv, Fv, Type) Result 55.47

## Contact

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