Billable Utilization Calculator

Billable utilization is billable hours divided by total available hours, expressed as a percentage. If a team member has 40 available hours in a week and bills 28 of them to clients, their utilization is 70 percent. The 12 non-billable hours went to internal meetings, admin, business development, or downtime. Calculating it per person and across the team tells you exactly how much of the capacity you pay for is actually earning revenue.

The input people most often get wrong is total available hours. Use realistic available hours, not contracted hours. A 40 hour week is rarely 40 hours of potential client work once you remove holidays, training, and the genuine overhead every role carries. Setting available hours honestly keeps your utilization target achievable rather than aspirational.

Most agencies target 70 to 85 percent billable utilization for delivery roles. Below 70 percent you usually have idle capacity or too much unbilled work, both of which hurt margin. Above 85 percent sustained over months is a warning sign: there is no slack for sick days, ramp time, or quality work, and burnout and turnover tend to follow. Senior and leadership roles are intentionally lower because their time goes to strategy, sales, and management.

If your rate is below target, the gap is not a number to feel bad about, it is a diagnosis. Track where the non-billable hours actually go for two weeks. Often the culprit is unbilled scope, slow internal handoffs, or admin that could be automated. Fixing the process recovers margin without anyone working longer hours.