It’s an administrative time saver. As a supplier, you do not need to produce invoices, as these are being generated by your client, saving you time.
It improves accounting accuracy. As the self-bill invoices are generated from approved timesheets, they will always have accurate rates, dates and days worked, in addition to the correct legally required information for each invoice.
It should facilitate quicker payments. As soon as your timesheet is approved, the invoice is generally raised.