For client's who have a billing structure of both flat fee and hourly rate, having the option to show on their invoices work performed as part of that charge would be beneficial. We have explored putting this time in the "expenses" portion of the invoice but that is misleading and has confused clients in the past. We choose not to mark such time as "non-billable" because then it doesn't show on the invoice as worked performed at all. We are currently describing this time as "No Charge" but it doesn't properly reflect the fact that the client has in fact already paid for the inclusion of that service. Please provide a way in which we can indicate to clients that certain time and tasks performed are / were built into their flat fee payment.