If the expected rate of return is 10% then the first month you will make as
interest 7500 (900K*10%*1/12)

and what you deduct is only 6000

Therefore you will never exhaust you funds infact they will keep growing.

That is why you get an error as period is = infinity

however using a 4% return and using the following formula I get the CORRECT
result of 208 months

=NPER(4%/12,-6000,900000)





"mschumacker" wrote in message
...
All,

I'm trying to calculate how many months I could draw on my retirement
funds.
Here's the example:

Present Value of Fund: 900,000
Amount deducted each month: 6,000
Expected rate of return on investment: 10%

I tried to use NPER = (.10/12, -6000, 900000) but get an error. If I
make
both signs negative, I get 111, which I know the answer should be bigger.

Thoughts?