Imagine you are running a project with 12 consultants. The reported utilization rate is 78 percent. That sounds solid. Then you discover that three of your people have not entered any hours for weeks, two others never record their travel time, and an engagement manager regularly books presales hours to project budgets because it is "easier".
What you see is not reality. It is a number made up of incomplete, inconsistent and systematically distorted data.
That is exactly the core problem of the utilization rate in growing consultancies: the KPI exists, but the data behind it does not stand up to scrutiny.
What are the consequences?
- Wrong staffing decisions, because actual capacity is not visible
- Overload of individual employees goes unnoticed until it leads to quality problems or resignations
- Project margins tip over without any early warning system going off
- Follow-up projects are calculated on the basis of incorrect effort data
What utilization rate in consulting actually means
The utilization rate measures the share of productively used working time in the total available working time. In consulting, you typically distinguish between:
- Billable utilization: the share of hours that can be billed directly to client projects, relative to total working time.
- Resource utilization: total project-related utilization, including internal projects, presales and professional development.
- Target utilization: the target value that serves as the planning figure for staff capacity and pricing.
For IT consulting and management consulting in the DACH region (Germany, Austria and Switzerland), the benchmark for billable utilization is usually between 70 and 80 percent. Values well above this indicate overload and increase staff turnover. Values below it signal either bench risks or, and this is the decisive point, gaps in time recording.
Utilization planning is only as precise as the data it is based on. This sounds trivial. In practice, it is systematically underestimated.
A reliable utilization rate needs three prerequisites:
- Complete time recording by all employees, consistent and timely
- Clear categorisation of activities (billable, non-billable, internal, presales, travel)
- A data basis that is not corrupted by manual exports, system breaks or different recording logics
Where the data breaks down in practice
Most growing consultancies manage utilization through a combination of a project management tool, separate time tracking and Excel. The typical process: at the end of the month, data is exported from different systems, merged in Excel and aggregated into a utilization overview.
The result is not a real-time KPI. It is a backward-looking report with a latency of two to four weeks. By the time you see that a consultant has been running at 95 percent for weeks, the risk of quality problems or burnout has already materialised.
Project controlling in this setup always reacts too late.
The booking behaviour problem: hours that are never booked
Measuring billable hours requires that all billable hours are actually recorded. In practice, this does not happen reliably:
Travel time is often not recorded at all or only as a flat rate. Preparation time for workshops and presentations often ends up under "internal" instead of on the project. Short calls with clients are rarely booked. Review work by senior consultants on project documents is missing from time records.
For consultancies that bill by daily rates, this is not a billing problem. These hours do not go on the invoice anyway. But they distort the utilization rate and mean that the real utilization of individual employees is systematically underestimated.
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The categorisation problem: what counts as billable?
Presales activities, internal training, preparing proposals, recruiting interviews: in many consultancies, there is no clear definition of what goes into the numerator of the utilization rate and what does not.
The consequence: the same activities are booked differently by different employees. The KPI loses its comparability. A utilization rate of 75 percent in team A and 72 percent in team B then says nothing about which team is actually more utilized.
Measuring utilization rate systematically: what works
Consulting productivity cannot be managed with backward-looking reports. What you need is a data basis that is filled continuously and can be analysed without manual exports.
This means that project time tracking and utilization management must run on the same data basis. If your employees book their hours in system A and you analyse utilization in system B or Excel, a gap inevitably opens up between what was booked and what arrives in your KPI.
Every export is a potential source of error. Cell formats do not match. Booking categories are mapped differently. Someone forgot a column. The result is a utilization rate that looks precise and is not.
ZEP Control and ZEP Operations cover exactly this: project time tracking, Resource Planning (available as an add-on) and project controlling run on a shared data basis. The data for the utilization rate comes from complete bookings, not from exported raw data.
Define categories once & stick to them
Decide which activity types exist in your organisation and how they are counted in the utilization rate. Typical categories for IT consulting and management consulting:
- Billable: direct client project work (billable)
- Project non-billable: project work that is not billed (e.g. extra hypercare effort beyond budget)
- Presales: proposal preparation, pitch work, RFP processing
- Internal: training, onboarding, internal projects
- Bench: employee actively not deployed
This categorisation must be stored in the system and communicated as binding. Without a clear rule, everyone books at their own discretion.
The distinction between billable and presales is particularly critical. In growing consultancies, senior consultants often book presales activities to active projects because the project structure in the system is familiar and there is no separate presales account. This inflates the utilization rate of ongoing projects and hides the actual presales effort. Both damage the quality of decision-making.
Complete recording as an organisational principle
The technically cleanest solution does little good if employees enter their hours two weeks late or incompletely. Booking quality is a leadership task, not an IT task.
In concrete terms, this means weekly reminders, mobile booking on the go, and a user experience that does not create resistance. ZEP offers a mobile app and hardware terminals (as an add-on) for exactly this purpose: bookings should happen without friction, not be perceived as a burden.
Studies on employee productivity show that the quality of working time reporting correlates strongly with how simple the recording process is. The more steps a booking requires, the more hours are lost.
Another lever: transparency about the purpose of recording. Employees who understand that time data is used to balance utilization and not primarily for control show greater booking discipline. That is a question of communication, not of the tool.
When the utilization rate becomes a management metric
A valid utilization rate enables decisions that are not possible on the basis of Excel estimates:
Staffing decisions: if you see that three consultants are constantly below 60 percent utilization while two others are permanently above 85 percent, you can redistribute proactively. This happens before quality suffers or employees resign.
Pricing decisions: if your actual billable utilization is well below the value assumed in your calculation, either your capacity planning is wrong or you are losing billable hours through gaps in recording. Both have a direct impact on your margin.
Capacity planning: when you win new projects, you need reliable capacity data. A utilization rate based on incomplete data leads you to accept projects for which you do not have the necessary capacity. Or you turn down projects even though the capacity would be there.
Utilization rate in context: which KPIs complement it
The utilization rate is an efficiency KPI. It tells you how well you use existing capacity. It says nothing about margin, client satisfaction or project quality.
For a complete management perspective, IT consultancies and consulting firms typically need three further KPIs:
- Project margin: the ratio of billable services to actual effort per project
- Realization rate: the share of recorded billable hours that are actually invoiced
- Bench time: the share of unassigned capacity, broken down by cause
Resource Planning, available as an add-on in ZEP Control and ZEP Operations, together with the booked hours provides the shared data basis for all four KPIs, without having to merge data from different systems.
Why growing consultancies need a system at this point
Up to a size of 10 to 15 employees, utilization can still be managed with Excel and manual processes. The effort is high, but manageable.
From 20 employees and more than five parallel projects, the situation changes fundamentally. Excel rarely fails technically. What increases are the consistency requirements for the data. More projects mean more booking options, more categorisation questions, more employees with different booking habits.
According to an analysis of Bitkom's project business report, more than 60 percent of German IT service providers still work with fragmented tool landscapes for time, projects and controlling. The operational effort of consolidating this data manually is considerable.
What really scales: one platform instead of three exports
Most growing IT consultancies and consulting firms start with a time tracking tool, a project management tool and Excel as the controlling layer. This three-way split works up to a point. After that, it creates more administrative work than it saves.
The problem is structural: every system break between time recording and controlling requires manual work. An employee whose holidays are stored in one tool affects availability in the other system. Project commitments in the project management tool are not immediately visible in the utilization overview. New employees have to be set up in several systems.
ZEP solves this with a land-and-expand approach: consultancies start with ZEP Track for clean Project Time Tracking. With ZEP Control, Project Management, project controlling and Resource Planning as an add-on are added on the same data basis. ZEP Operations closes the loop with Proposals, Invoicing and complete commercial management.
The decisive advantage: there is no system change as the organisation grows.
From booking hours to commercial management
ZEP Operations also offers growing consultancies the following: the entire path from project time tracking through controlling to invoicing runs on one data basis. The figures for forecast, billing and margin come as live data from day-to-day operations, not from manual export processes.
That is the difference between a consultancy that looks at its profitability in the rear-view mirror and one that steers it with foresight.
If you still calculate utilization from Excel exports today, that is not a sign of a lack of competence. It is a sign that your organisation has reached a point of growth at which the previous tools no longer match the complexity of the business.
Conclusion: four steps to a reliable utilization rate
Start with an inventory of your current time data: how complete are the bookings? How consistent is the categorisation? Which activities are systematically missing? These questions can usually be answered with a sample analysis of three to four months.
Then define binding booking rules for your organisation: what counts as billable, what as non-billable, which categories exist? This decision has to be made at management level. Document the result in a short internal rulebook and actively communicate it to all employees.
Make sure that booking and analysis run on the same data basis. Every system break between time recording and controlling costs data quality and control. If your current tool landscape requires several exports and manual steps, that is the first place to start optimising.
Establish a regular review format: utilization per employee and per project should be visible weekly or every two weeks, as a management metric. Anyone who is overloaded should get support. Anyone who is permanently below the target line deserves an explanation and, if necessary, a different project assignment.
Finally, check whether your current tool landscape meets these requirements, and whether the utilization rate you see today is a reliable basis for decisions. If the honest answer is "no", that is a clear signal for a structural solution, not more Excel optimisation.
A valid utilization rate is not an end in itself. It is the basis for every decision about capacity, staffing, pricing and growth. If you build this KPI on uncertain data, you build your entire commercial management system on sand.
FAQs
What is a good utilization rate for IT consulting?
For IT consulting and management consulting, the benchmark for billable utilization is typically between 70 and 80 percent. Values permanently above 85 percent signal a risk of overload. More important than the absolute value is a consistent measurement method: a utilization rate is only useful for management if it is based on complete and consistently categorised time data.
How do you calculate the utilization rate correctly?
The billable utilization rate is calculated as: (billable hours / available working hours) x 100. Available working hours are the contractually agreed hours minus holidays, sick leave and public holidays. The critical point is the exact definition of which activities count as "billable". This categorisation must apply equally to all employees.
Why does my utilization rate not match the utilization my team feels?
This is almost always due to gaps in recording. Typical causes are unbooked travel time, presales hours booked to projects, work on the go that is never booked afterwards, and late bookings that distort the monthly figure. The utilization your team feels is often closer to reality than the measured number.
When is a system for utilization tracking worth it?
From a team size of 15 to 20 employees or more than five parallel projects, manual consolidation from Excel and separate systems becomes a significant source of errors. If your utilization rate is based on a monthly export with two weeks of latency, that is a structural problem, not a data problem.
Which categories do I need for a meaningful utilization rate?
At a minimum: billable (billable project work), project non-billable (project work that cannot be billed, e.g. overruns on fixed-price budgets), presales, internal and bench. Without this differentiation, the utilization rate mixes fundamentally different activities and loses its value for capacity and pricing decisions.
How can consultancies measure billable hours reliably?
Three prerequisites are decisive: first, frictionless booking with a mobile app, so that hours are booked promptly and not retroactively; second, clear categorisation rules that are binding for everyone; third, a shared data basis for booking and analysis, without manual exports or switching between systems. Only when all three conditions are met can billable hours actually be measured rather than estimated.
