And if you are using XL2007 and above, or if you have the Analysis ToolPak
add-in selected for XL2003 or earlier, then you can use this formula...

=EOMONTH(A1,1)+1

Remove the "+1" part if you really meant end of the month and not first of
the month after the end of the month.

--
Rick (MVP - Excel)



"d7" wrote in message
...
Hi I need a couple of date formulas for invoices recieved, eg. invoice
date
is 14/03/2010, payment terms are end of month following. so i need excel
to
calculate that the due date is in this case 1/05/2010 is the due date.