A billing process flow chart explains the step-by-step procedure of asking for payments from clients by sending invoices. A billing process flow chart explains this entire procedure in a sequential flow chart manner. In the field of accounting, there are six types of invoices sent to the customers. Some examples of these invoices are- Final invoice, Past due invoice, Recurring invoice, etc. A billing process flow chart helps a business to understand how many goods they have with them to sell and at the same time to get to know if individual orders have been delivered. The main rationale behind preparing a billing process flow chart is to understand how much business has been carried out in terms of selling the inventory.