How to Calculate True Utilization Rate for Your Consulting Team

Utilization rate is the single most important metric for a consulting firm. It directly correlates with revenue. But getting the number right is harder than it looks. Most firms either overcount or undercount, and both lead to bad decisions.

The basic formula

At its simplest: Utilization % = (Hours Billed / Total Billable Hours) x 100. The challenge is defining the numerator and denominator correctly.

Defining total billable hours

Total billable hours is not simply working days times 8. You need to deduct company holidays and approved time off for each employee. A developer who took 5 days of vacation in March has fewer billable hours than one who didn't. If you don't account for this, your utilization numbers will always look artificially low.

You also need to decide which employees to include. Should the CEO count? The office manager? Most firms exclude non-billable roles like executive leadership, administrative staff, and business development from the utilization calculation.

Defining hours billed

Hours billed should come from actual project assignments, not timesheets alone. If an employee is assigned to a project for 8 hours a day on specific days, those are the billed hours. But you need to handle different assignment types correctly.

An employee assigned every workday is straightforward. An employee assigned only on Mondays and Wednesdays has fewer billed hours per week. An employee with 10 total days spread across a quarter requires tracking which specific dates were worked. Each of these capacity types produces a different number, and your calculation needs to handle all three.

Common mistakes

Counting non-billable project work as billed hours. Internal projects, training, and bench time should not inflate utilization. Only client-facing billable work counts.

Using calendar days instead of working days. Weekends, holidays, and time off must be excluded from both sides of the equation.

Not excluding terminated employees. If someone left mid-month, including their full month of potential hours in the denominator will drag utilization down unfairly.

What good looks like

For most IT consulting firms, 80% utilization is the target. Below 60% usually signals a problem: either too many people on the bench or too much non-billable work. Above 90% consistently can mean burnout risk.

The key is not just tracking the number but being able to drill into it. Which employees are underutilized? Which projects are consuming more capacity than expected? A good utilization report answers these questions, not just the top-line percentage.

Automate it

Manually calculating utilization is slow and error-prone. It requires pulling data from assignments, cross-referencing with time off and holidays, filtering out excluded roles, and handling multiple capacity types. This is exactly the kind of work that should be automated.

When utilization updates in real time as assignments change, you can spot problems early and act on them before the month is over.