It is Calendar days, which is *mostly* the standard way people think of Payment Terms.

If you are asked for Business Days, be sure to also ask:

1. How are the days defined? This may require the creation and maintenance of a calendar that may change each year.

2. Are there different days per region/country? This may require a business day calendar per region/country.

3. Is the pupose just to use Business Days in the caluation of the due date? What if the due date falls on a day that is not a Business Day?  This may require a policy to move the due date back (or foward) to a Business Day.

4. Are there exceptions when the number of days to pay deviates too much from the calendar?  If you have a due date on Friday, which is a holiday, and move the date forward to Monday, because that too is a holiday, you are giving someone four more days to pay.  This may require complex logic to handle these cases.