What does it mean to define billable hours?
Every agency that tracks time has to draw a line between hours it can invoice and hours it cannot. Defining billable hours is drawing that line deliberately, before the work starts, instead of arguing about it when the invoice goes out. The definition says which activities count (creative, production, editing, client meetings, revisions within scope), which do not (pitching, internal meetings, training, fixing the agency's own errors), and how the gray areas are handled: travel, waiting on set, a call that is half about the project and half about the next one.
The definition lives in two places: in the engagement terms the client signs, and in the time-tracking categories the team uses. If those two do not match, the invoice will not match either.
Why it matters
Why defining billable hours matters
Vague definitions cost money twice. Hours that could have been billed are written off because nobody was sure, and hours that should not have been billed appear on an invoice and cost the agency goodwill when the client questions them. A clear definition settles both. It also makes utilization numbers mean something: if one producer logs travel as billable and another does not, the agency's most important ratio is being measured with two different rulers.
For clients, a written definition is the difference between a timesheet they can read and one they have to interrogate. Knowing in advance that revisions beyond the second round are billable makes the third round a decision rather than a dispute.
In practice
How defining billable hours works in practice
- 01
The agency writes a short policy: a list of billable activities, a list of non-billable ones, and rulings on the common gray areas. Travel to a shoot is usually billable; travel to a pitch is not. Waiting on set is billable; waiting for a client to approve a script is not. Rework caused by a client change is billable; rework caused by the agency's mistake is not. The policy goes into the standard engagement terms and into the categories in the time-tracking tool, so logging an hour is also classifying it.
- 02
Then it is applied. Producers review timesheets against the policy before invoicing, write off what should not be charged, and flag anything that suggests the policy needs a new line. The policy is revisited when disputes recur, because a recurring dispute is a missing definition.
Watch out
What people get wrong about defining billable hours
Leaving it to each person's judgment. Individual judgment is how two people on the same job bill the same meeting differently. The opposite mistake is a definition so aggressive that clients feel metered: billing for every email tends to produce clients who stop emailing. The definition should make hours predictable, not maximize them.
Agencies on fixed fees sometimes skip the exercise entirely, reasoning that nothing is invoiced by the hour. They still need it, because without a definition they cannot tell whether a fixed fee covered the job or quietly subsidized it.
