When you have a client invoice related to a percentage complete job or fixed-price job that has not been sent you can link the expected send date to an item on your schedule.

For example - you can link the client invoice to the item on your schedule (Slab pour) so that the client invoice will be sent one day after slab pour is completed.

By linking this client invoice to the schedule, the system will take the expected invoice send date, add the payment terms on the invoice, and then add that expected incoming payment to your cashflow forecast.

For cost-plus jobs, the system will assume that you will invoice your client after the scheduled end date for each cost item and add your default supplier payment terms and default customer invoice payment terms.