Free tool
Billable Utilization Rate Calculator
See what share of your available hours are billable. Enter two numbers to get your utilization rate — and how it compares to a healthy range for service firms.
Calculate your utilization rate
Hours you can bill to clients in the period.
Total working hours available in the same period (capacity).
Billable utilization
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Enter your hours to see your utilization rate.
01
What is billable utilization?
Billable utilization is the share of a person's or team's available working hours that gets billed to clients. It's the core efficiency metric for any business that sells time: a higher rate means more of your paid capacity turns into revenue; a lower rate means capacity is going to non-billable work — admin, sales, rework, or idle time.
The formula
Billable utilization = billable hours ÷ available hours × 100
'Available hours' is your capacity for the period — for a full-time person, roughly 40 hours a week minus holidays and time off.
A worked example
If a consultant has 160 available hours in a month and bills 120 of them, utilization is 120 ÷ 160 × 100 = 75%. The other 40 hours went to proposals, internal meetings, and admin.
02
What's a good utilization rate?
There's no single 'right' number — it depends on the role and the business model — but as general industry guidance, many service firms aim for the ranges below. Client-facing billers sit higher; people who also sell, manage, or run the business sit lower by design.
- Agencies & creative studios: ~70–80% for billable roles
- Consulting & professional services: ~70–85% for consultants
- Freelancers & solo operators: often 50–70% — one person also does sales, admin, and delivery
- Leadership & non-billable roles: lower by design — they are not meant to be fully billable
Chasing 100% is a red flag, not a goal — it leaves no room for business development, learning, or rest, and usually is not sustainable.
03
Utilization vs. realization
Utilization measures how much of your capacity is billable; realization measures how much of your billable time actually gets billed and paid (after write-offs and discounts). High utilization with low realization means you are busy but leaving money on the table.
How to improve utilization
- Track time at the task level so non-billable work is visible, not hidden.
- Set budgets and alerts so overruns do not quietly become write-offs.
- Watch utilization per person and per team, not just the company-wide average.
- Reduce admin drag — the faster time entry is, the less billable time is lost.
Frequently asked questions
How do you calculate billable utilization?
Divide billable hours by available (capacity) hours for the same period, then multiply by 100. For example, 120 billable hours out of 160 available is 75% utilization.
What is a good billable utilization rate?
As general guidance, many service firms target roughly 70–85% for client-facing billable roles; freelancers and people who also handle sales or management are typically lower. 100% is not a healthy target — it leaves no room for non-billable work or rest.
What's the difference between utilization and realization?
Utilization is the share of available hours that are billable; realization is the share of billable hours that actually get invoiced and paid after write-offs and discounts.
Ready when you are
Track utilization automatically
Timix.AI computes billable utilization live from your logged hours — per person, per team, and per period — alongside per-client profitability and budgets. No spreadsheets.