What is a good billable utilization rate?

Most professional-services firms target 70–80% for individual contributors. Managers and partners typically run lower (50–65%) because a share of their time goes to business development, internal meetings, and staff oversight. Rates above 90% are rarely sustainable long-term.

How is billable utilization calculated?

Billable utilization (%) = (Billable Hours ÷ Available Hours) × 100. Available hours is usually total working hours in the period minus approved leave. Some firms use a fixed denominator such as 40 h/week × weeks in the year regardless of leave.

What is the difference between billable and productive utilization?

Billable utilization counts only hours invoiced to clients. Productive utilization is broader — it includes internal projects, R&D, training, and other value-creating work. Billable utilization is the primary revenue metric; productive utilization is the capacity metric.

What counts as available hours?

Available hours = total calendar working hours minus approved paid time off (vacation, sick, public holidays). Some firms also subtract a fixed internal overhead allowance (e.g. 2 h/week for all-hands meetings).

How do I improve low utilization?

Common levers: reduce bench time between projects, shorten sales cycles, cross-sell to existing clients, improve project scoping to prevent scope creep, and track non-billable time to surface hidden drains. A dashboard reviewing utilization weekly catches problems before month-end.

Billable Utilization Calculator

Name: Billable Utilization Calculator
Availability: InStock
Author: Nham Vu

Enter billable hours and total available hours to instantly calculate utilization rate for consultants or entire teams.

Individual Mode

Available hours (working hours in period)

Billable hours (client-facing hours logged)

Target utilization: 75%

50%75%100%

Billable Utilization Rate

—

Hours Breakdown

Billable hours —

Non-billable hours —

Available hours —

Utilization rate —

To Hit Target

—

billable hrs needed

—

hrs above / below target

Copied!

Summary

Enter billable hours and total available hours to instantly calculate utilization rate for consultants or entire teams.

How it works

Enter the total available working hours in the period (e.g. 160 for a standard month).
Enter the hours actually billed or worked on client projects.
The calculator divides billable hours by available hours and multiplies by 100.
Review the utilization gauge to see how the rate compares to common targets.
Use the team mode to add multiple people and get an aggregate team utilization.
Adjust any input and results update instantly.

Use cases

Track individual consultant utilization against monthly targets.
Calculate team utilization across a professional-services practice.
Identify under-utilized staff before a billing period closes.
Report utilization to clients or leadership in a shareable summary.
Model the revenue impact of increasing utilization by a few percentage points.
Compare billable vs. non-billable time split for capacity planning.
Set realistic utilization targets that account for admin and business development.
Audit timesheet data before month-end invoicing.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu