Agency utilization rate: how to calculate and use it
Utilization is useful when the denominator is explicit. It becomes misleading when leave, internal responsibilities and incomplete records disappear from the calculation.
Product capabilities reviewed against the ABH truth sheet on 14 October 2026. Any arithmetic examples are fictional, in USD and exclude taxes. Operational guidance only.
Short answer
Billable utilization is billable hours divided by available hours, multiplied by 100. Define available hours and the review period first, then compare roles fairly. ABH provides work records, not a utilization calculator or capacity planner.
Use ABH for the work and invoice record. Receive client payments through your own external arrangement and record them manually.
Formula with a worked example
Use billable hours / available hours x 100 for billable utilization. Specify whether billable means eligible under the agreement or already invoiced; those definitions answer different questions. Use the same definition for every person in the comparison. An invoice delayed by a milestone should not automatically make the delivery team appear inactive.
Illustrative fictional example: a consultant has 160 scheduled hours in a month, with 16 hours of approved leave. Using 144 available hours and 108 billable hours gives 108 / 144 x 100 = 75%. If the agency instead uses all scheduled hours, the result is 67.5%. Both arithmetic results are correct, but they describe different denominators. Label the denominator rather than hiding the difference.
Available hours: what to subtract
Start with contracted working hours for the period. Remove holidays and leave consistently, and document your treatment of sickness and other absences. For part-time contributors, use their own schedule rather than a full-time assumption. Do not shrink available hours after seeing the result simply to produce a more attractive percentage.
Decide whether required training belongs inside the denominator or is excluded under a written policy. Either choice needs explanation. Preserve time for management and internal responsibilities in the interpretation even if those hours remain available in your formula. Your working calendar supplies this information; time entries alone cannot tell you how many hours a person was expected to work.
Billable vs total utilization
Billable utilization describes client-chargeable work. Total work utilization can include internal delivery, training, sales and administration, provided you explain exactly what counts. A person can be fully occupied and still have few billable hours. The billable versus non-billable guide explains why occupied time and chargeable time are separate categories.
Avoid turning the category into a judgment about usefulness. Proposal preparation may support future revenue while remaining non-billable today. Record the activity and use an agreed classification in your review worksheet. ABH's client, project and task time records can provide part of the input; this does not mean ABH supplies a billable classification setting or a computed utilization metric.
Choosing a target by role
An account lead, a delivery specialist and an owner have different responsibilities. Set expectations from those responsibilities, the service agreement and realistic historical records. A delivery role with little internal administration may have more chargeable time available than a lead responsible for supervision and new business. Comparing both with one unexplained target can reward the wrong behavior.
There is no universal target established by this guide. Agree an internal range and discuss sustained changes with the contributor. Ask about blocked work, changed duties and missing records before changing expectations. The team tracking habit guide helps improve the quality of the record without treating every shortfall as a performance issue.
Using the number in pricing and hiring decisions
Use several periods of demand and delivery evidence before changing staffing. High billable utilization alongside unresolved revisions may indicate insufficient review time, not a reason to promise more work. Low utilization alongside an empty pipeline raises a different question from low utilization caused by internal product work or a temporary client pause.
For pricing, estimate the billable hours the agency can realistically sell and deliver. The break-even rate worksheet connects that assumption to costs, and the service pricing guide connects it to scope. Utilization can inform a hiring discussion, but the percentage alone cannot forecast demand or tell you which role to hire.
Limits of the metric
A weekly ratio can hide poor notes, unpaid overtime, unsuitable task assignment and an uneven distribution of work. Check the record with the people doing the work. Never use a higher number as evidence that quality improved. Track corrections and client outcomes separately, and avoid interpreting a short period as a durable trend.
ABH does not offer a utilization calculation, resource scheduling or capacity planning today. Its existing analytics realization view answers another question, with advanced analytics on Pro. The time tracking overview describes the available work records. Calculate utilization outside ABH with your own calendar and classification inputs, and keep the assumptions beside the result so another reviewer can reproduce it.
Frequently asked questions
Does ABH calculate utilization?
No. Calculate it separately using work records, an agreed billable classification and available hours from your working calendar.
Should leave count as available time?
Choose and document a consistent policy. The worked example removes leave from scheduled hours.
Is a higher utilization number always better?
No. It can hide missing review time, overtime or responsibilities that are necessary but non-billable.
Review the workflow before you choose.
Use ABH for the work and invoice record. Receive client payments through your own external arrangement and record them manually.