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# Excel/Excel formula to find ROI period

Question

Excel Question
Dear Sir,
I am a sales engineer in a European company. First of all, I would like to appreciate and thank you for your such a devotion to help out people and I really salute you for sparing this valuable time to help people and spreading knowledge.
Here is my question:
I am using excel to make feasibility or Return on investment report. Where I have 3 columns as given below,
No. of Month   Month Name   Monthly income    ROI
(Let total cost is 5000)
1   Jan   1000   4000
2   Feb   2000   2000
3   March   1000   1000
4   April   1500   -500
5   May   1000   -1500

Here as you can see, I have got my money back in 4th month. So I want the excel to automatically mention the ROI period or number of months for ROI.
ROI period for investment of 5000 is    Here I want to show ROI period / No of months taken

something like this

=INDIRECT("A"&MATCH(0,D1:D48,-1)+1)

would do it, assuming that column D has the ROI data you mentioned, and the month number is in column A

(question found in question pool, indicating original expert was unable or unwilling to answer the question)
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#### Aidan Heritage

##### Expertise

I have provided first hand support since `95 for Microsoft Office majoring in Word and Excel - support for all versions from 2 onwards. I'm based in the UK, so please allow for time differences when asking me questions from other parts of the world!

##### Experience

My background is in the insurance industry and call centre areas, but have been called upon to provide many varied solutions.

Education/Credentials
I'm educated to UK A level standard, but as I left school some 30 years ago that is rather irrelevent - university of life has provided more of a background!