Abacus Accounting lets you use flat fee payment schedules when billing/collecting payment. To use flat fee payment schedules, following the normal billing procedures but with a few changes:
Ensure that you have implemented flat fee with payment schedule for the matter.
When setting billing criteria by group, you can enter the flat fee payment schedule date in the Scheduled Payment Date field to filter for all bills with that payment schedule.
For reporting purposes, you can run the Flat Fee Schedule Detail report.