ModusBill is legal billing software that converts time entries, flat fees, and retainers into invoices clients can pay through secure online links. The platform includes IOLTA trust accounting with three-way reconciliation to maintain accurate client ledgers and ensure compliance. Time tracking records work by matter, and the billing desk can revise entries before invoicing while preserving an uneditable audit trail. The system handles hourly billing, flat fees, and retainers, with earned fees t