An unbilled charge is activity you plan to invoice to a customer, but have not yet included on a saved invoice. Unbilled charges can be:
When you make an invoice recurring, you can specify that it should collect any unbilled charges that are present when each occurrence of the transaction is actually created.
You might want to do this if you have occasional charges to bill a customer in addition to the regular charges that are in the main part of the invoice template.
Unbilled charges are also called non-posting transactions because they are saved, but the transactions are not reflected on report totals. Also, they don't affect the customer's balance, or the Accounts Receivable balance.