Recently, a client asked how they could tell if a customer had unbilled time.
One way to tell if a Customer has unbilled time is by running the Billed/Unbilled Hours by Person and Activity report. This report is only available in the Contractor, Professional Services, and Accountant editions.
To access the report from the Report menu choose: Contractor/Professional Services or Industry Specific depending on the version you are using. This report shows how much time each employee or subcontractor spent on each type of work your company performs, how much time has been billed, unbilled, or is not billable.