Employee Utilization Rate Calculator: Billable Hours Share
Work out the utilization rate of an employee, team, or firm — the share of working time that turns into invoiced client work.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Utilization rate | Non-billable share |
|---|---|---|
| 1,600 of 2,000 hrs | 80.00% | 20.00% |
| 1,400 of 2,000 hrs | 70.00% | 30.00% |
| 900 of 1,800 hrs | 50.00% | 50.00% |
| 1,720 of 2,000 hrs | 86.00% | 14.00% |
How This Calculator Works
Enter billable hours and total working hours over the same period. The calculator divides one by the other and multiplies by 100 to give the utilization rate, with the non-billable share — admin, training, sales support, internal work — shown alongside.
The Formula
Part as a Percentage of a Whole
Part is the portion, Whole is the total it belongs to
Worked Example
An employee billing 1,600 hours of a 2,000-hour year has 80% utilization, with a 20% non-billable share. Most professional service firms target 70% to 80% for individual contributors; partners and managers often sit lower, as more of their time is sales and oversight.
Key Insight
Utilization is the lever behind agency profitability — but pushing it past 85% breaks the engine. Burnout, quality drops, and turnover all spike at very high utilization. A sustainably profitable firm balances utilization in the 70s with a billing rate that covers the non-billable share.
Frequently Asked Questions
How is utilization calculated?
Divide billable hours by total working hours, then multiply by 100. Billing 1,600 of 2,000 working hours is an 80% utilization rate.
What counts as billable?
Hours invoiced to clients — actually charged, not just worked. Hours spent on a project but written off (over budget, courtesy work) are billed at zero and pull utilization down.
What is a good utilization rate?
Junior contributors often run 75% to 85%; mid-level around 70%; senior partners much lower because of sales and oversight time. Push individual rates past 85% and burnout and quality both suffer.
How is this different from capacity utilization?
Capacity utilization measures plant or production output against maximum capacity. Employee utilization measures billable time as a share of working time — both ratios, but different denominators and different industries.
How can I raise utilization without burning people out?
Cut non-billable waste before adding billable work — internal meetings, admin, low-ROI sales support. Sustainable utilization grows by removing friction, not by adding hours.
Related Calculators
Methodology & Review
The utilization rate is billable hours divided by total working hours, multiplied by 100. The complement is the non-billable share — admin, training, sales support, internal work. The same calculation works for an individual, a team, or a whole firm.
Written by Ugo Candido · Last updated May 17, 2026.