XNPV


Returns the net present value of an investment with irregular cash payments.

Syntax:

XNPV(rate, payments, dates)

rate is the annual interest rate.
payments is a range or array containing payments made, positive if paid to you, negative if you pay.
dates is a range or array containing the dates on which those payments are made.
XNPV calculates a net present value on the first date given ( ), using the formula:


where  is the  payment and  the  date, i starting at 0.
The calculation assumes a 365 day year, even in a leap year.

Example:

XNPV(5%, B2:B4, C2:C4)
where B2:B4 contains -1000, 500, 550 and C2:C4 contains the dates 2008-01-01, 2009-01-01, 2009-07-01, returns approximately -12.65. If you bought an investment for 1000 on 2008-01-01 which paid 500 on 2009-01-01 and 550 on 2009-07-01 you'd make a small loss, compared to investing at a 5% interest rate.
XNPV(5%, B2:B4, C2:C4)
where B2:B4 contains 0, 500, 550 and C2:C4 contains the dates 2008-01-01, 2009-01-01, 2009-07-01, returns approximately 987.35, the net present value on 2008-01-01 of an investment which paid 500 on 2009-01-01 and 550 on 2009-07-01, using a 5% interest rate.






 
Created with Zapof