None of these work-around answers (such as progressive invoicing, receiving partial payments and then changing due dates, or even a 'comment' type of line-item) answers the OP inquiry of QB allowing for PAYMENT TERMS of "50% deposit, balance due on delivery".  Is there a way to set this up IN THE TERMS list?  Only thing I can see for customizing PAYMENT TERMS is to allow for a discount if paid by certain dates or within a certain number of days.  I don't want to discount it, I want 50% up front, and the remaining balance due at time of completion of job/delivery of goods/performance of service.