Progress Invoice

What is a progress invoice?

A progress invoice bills clients for work completed during a period rather than waiting until project completion. Progress invoicing improves cash flow by converting work in progress to receivables and then to cash throughout the engagement. For long projects, progress invoicing also reduces collection risk by avoiding large end-of-project bills that clients may dispute or struggle to pay.

Progress invoicing approaches

Bill monthly based on hours worked and expenses incurred. Alternatively, bill at defined milestones when specific deliverables are complete. Some engagements use percentage-of-completion billing based on estimated progress. The approach depends on your fee structure and client preferences. Whatever method you choose, establish the billing schedule in your engagement letter so clients expect regular invoices.

Progress invoices and client communication

Progress invoices create natural checkpoints for project status discussions. Use invoice delivery as an opportunity to review what was accomplished and what comes next. Address any concerns before they compound. Clients who receive regular invoices with clear descriptions rarely have billing surprises at project end. Progress invoicing turns billing into a communication tool, not just an administrative task.