Batch invoicing is where you quickly process all the eligible projects ready to be invoiced. You can start a batch session by isolating the desired projects and define a few options and rules. You can either bill based on approved time and expenses (WIP) or a fixed amount. Projects billed based on WIP rely on your billing period and other filters. A fixed amount can be entered on the fly or pre-set using a billing schedule or automatic billing. If required, some projects can be billed together,
for instance projects and their phases, on a joint invoice. The legal industry does joint billing very often.
When you have finished reviewing everything, you can then process an invoice as a draft or final. Draft invoices are kept out of the A/R while a final review is performed. Check the Core Help for details.