numpy.pmt() in Python (original) (raw)

Last Updated : 29 Nov, 2018

numpy.pmt(rate, nper, pv, fv, when = ‘end’): This financial function helps user to compute payment value as per the principal and interest.

Parameters :
rate : [scalar or (M, )array] Rate of interest as decimal (not per cent) per period
nper : [scalar or (M, )array] total compounding periods
fv : [scalar or (M, )array] Future value
pv : [scalar or (M, )array] present value
when : at the beginning (when = {‘begin’, 1}) or the end (when = {‘end’, 0}) of each period.Default is {‘end’, 0}

**Return :**Payment value

Equation being solved :

fv + pv*(1+rate)**nper + pmt*(1 + rate*when)/rate*((1 + rate)**nper – 1) == 0

or when rate == 0
fv + pv + pmt * nper == 0

Code:

import numpy as np

Solution = np.pmt( 0.10 / 12 , 12 * 12 , 10 , 000 )

print ( "Solution : " , Solution)

Output:

Solution : -0.1195078262827336

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