Excel divide by months until year end

Hello and thanks in advance

i have a sales sheet which staff record date, customer and recurring amount...

what i need is another column which works out the recurring amount by month left until end year (which is in cell z1, 31st may 2016)

Please note I am not great at excel.....but willing to learn


date                         Customer       Recurring

15 June 2015           AS                          2300
17 June 2015           BE                         17000
2 July 2015               CF                        25000


date                         Customer       Recurring    New

15 June 2015           AS                          2300      12 month left so total ok
17 June 2015           BE                         17000     12 month left so total ok    
2 July 2015               CF                        25000      I think i need divide by 12 then multiply by 11
2 August 2015         GH                      125000     I think i need divide by 12 then multiply by 10


hope you guys can help
LVL 31
James MurrellProduct SpecialistAsked:
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Saurabh Singh TeotiaCommented:
I'm assuming this is what you are looking for...

Kanti PrasadCommented:

Put the below formula in each cell of Recurring and see that every row has Z1 as your date is in Z1.

With the below formula, the Recurring column will have   2300, 17000, 20833.3, 93750




James MurrellProduct SpecialistAuthor Commented:
Saurabh Singh Teotia that is great but if they enter 0 you calculation shows 1
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Saurabh Singh TeotiaCommented:
You can use this Formula..


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James MurrellProduct SpecialistAuthor Commented:
sorry not in date field in c3   i changed but still did not work sorry
Kanti PrasadCommented:

Please use this updated xls . I just added the month difference column so that the formula will not look too big. This one will calculate values for less that a year or even if required for more than a year
James MurrellProduct SpecialistAuthor Commented:
thanks you pointed me in right direction and i managed to understand you new code: i made a change in one part but this is correct solution

my change
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