Utilization is one of the metrics professional services firms rely on most, used to measure performance, forecast revenue, and guide resourcing decisions. But I think we often focus too much on the number itself and not enough on what it actually tells us.
A team can have high utilization and still struggle with delivery. When people spend almost all their time on client work, there is little room left for planning, solving problems, or adapting when project priorities change. The challenge is not whether firms should measure utilization, but whether they are using the right benchmark for their business.
In this guide, I will explore professional services utilization benchmarks, how utilization is calculated, why targets differ across teams, and what other metrics leaders should consider before making resource decisions.
What Is Professional Services Utilization?
Professional services utilization measures how much of an employee's available working time is spent on client work compared with other activities.
At a basic level, it answers: How much of our team's available time is being used for work that supports revenue and delivery?
That sounds straightforward, but utilization is not the same as productivity. Teams also spend time on planning, training, internal improvements, sales support, mentoring, and other activities that may not be billable but still contribute to the business.
What I find important is the context behind the number. A lower utilization rate does not automatically mean a team is underperforming, just as a high rate does not guarantee strong delivery.
Utilization is most useful as a signal. It helps leaders see how capacity is being used and identify where they may need to look closer.
What Is Billable Utilization and How to Calculate It? (Formula & Examples)
When professional services firms talk about utilization, they are usually referring to billable utilization.
Billable utilization measures the percentage of an employee’s available time spent on work that can be billed to clients. It helps firms understand how much of their team’s capacity is directly contributing to revenue.
The formula is: Billable Utilization = Billable Hours ÷ Available Working Hours × 100
For example, a consultant has 160 available working hours in a month and spends 120 hours on billable client projects. (120 ÷ 160 × 100 = 75% billable utilization)
At first glance, the calculation looks simple. What I think actually creates confusion isn't the formula itself, it's how firms define available working hours. Different organizations make different choices:
- Should holidays and paid leave be removed?
- Should internal meetings count as available time?
- Should training or sales support be included?
These choices can change the final number more than people expect.
Firms need a consistent method. Otherwise, two organizations could report the same 75% utilization rate while calculating their available hours differently. For that reason, a benchmark should always be read alongside its methodology.
Read also: What are Billable Hours? Examples, Rules, and Best Practices
Billable Utilization vs Resource Utilization vs Capacity Utilization
One thing that often gets missed in utilization discussions is that there is no single utilization number that explains everything.
Billable utilization is usually the first metric firms look at because it has a clear connection to revenue. However, it only shows one part of how a team’s capacity is being used.
A team can have strong billable utilization today and still face capacity problems later.
For example, a consulting team may be 85% utilized, but the few people who are available may not have the right skills for upcoming projects. The challenge is not whether the team is busy. It is whether the right capacity is available at the right time.
Looking beyond billable utilization helps leaders understand different parts of resource performance.
| Metric | What it measures | Question it helps answer |
|---|---|---|
| Billable utilization | Time spent on client-billable work | Are we generating enough revenue from available capacity? |
| Resource utilization | How team capacity is used across different activities | Are we using people’s time effectively? |
| Capacity utilization | How much available capacity is committed or available for future demand | Do we have enough capacity to deliver upcoming work? |
Each metric provides a different perspective. Billable utilization helps evaluate current revenue contribution. Resource utilization shows how time is distributed across activities. Capacity utilization helps leaders understand future availability and potential constraints.
The more useful question is not only “Are our people busy?” but also “Do we have the right capacity available to deliver what we have committed to?”
Read also: The Difference Between Capacity, Availability, Utilization, and Throughput
Professional Services Utilization Benchmarks: What Is a Good Rate?
If there is one utilization number professional services firms hear repeatedly, it is 75%.
SPI Research has used 75% as an optimal benchmark, but the industry average does not always reach that level. The latest data shows why context matters.
SPI Research's 2025 Professional Services Maturity Benchmark reported average employee billable utilization of 69.3% in 2023 and 68.9% in 2024 across its survey population. The 2026 benchmark, covering 2025 performance, reported utilization falling further to 66.4%, the lowest level in SPI's 19-year history.
That does not mean every firm should simply push utilization toward 75% or higher. The right target depends on the firm's service model, project mix, roles, cost structure, and the amount of non-billable work required to deliver successfully.
1. Utilization Benchmarks by Professional Services Type
Different professional services firms have different utilization patterns. SPI's 2024 data
shows a clear difference across segments:
| Professional Services Type | 2024 Average Billable Utilization |
|---|---|
| IT Consulting | 71.0% |
| Management Consulting | 67.4% |
| SaaS Professional Services | 66.4% |
| Software Professional Services | 61.8% |
| Architecture & Engineering | 70.3% |
| Agencies | 64.4% |
These are SPI Research averages, not recommended targets.
The difference is worth paying attention to. IT consulting, for example, averaged 71.0%, while software professional services averaged 61.8%. That does not mean one model is inherently more efficient. Their work, staffing models, and mix of billable and non-billable activities are different.
2. Utilization Benchmarks by Role: Why Targets Differ Across Teams
The same principle applies within a firm.
A consultant, project manager, technical lead, and practice leader may all contribute to client success, but they do not spend their time in the same way.
| Role | Why Utilization Expectations Differ |
|---|---|
| Consultants | Spend more time on direct client delivery |
| Project Managers | Coordinate teams, manage risk, communicate with clients |
| Senior Consultants / Architects | Balance delivery with mentoring and business support |
| Practice Leaders | Spend more time on sales, hiring, coaching, and business development |
A single utilization target is easy to measure, but it can hide these differences.
SPI's own research supports looking beyond a single average. Its 2025 benchmark breaks utilization down by market, organization size, and other factors rather than treating all professional services organizations as one group.
Why 100% Utilization Is Not a Good Target
At first, 100% utilization sounds ideal. Every available hour goes to billable client work, so the firm appears to be getting the most from its people.
But professional services work rarely goes exactly as planned. Projects change, clients add requests, and teams need time for planning, training, problem-solving, and internal work. At 100% utilization, there is no room for any of it.
SPI’s 2025 benchmark shows that the 70%–80% group was the largest, representing 30.3% of firms, while 15.2% were in the 80%–90% range. This does not make 70%–80% a universal target, but it shows why full utilization should not be confused with maximum performance.
Some non-billable capacity is necessary. A little room in the schedule can be what allows a team to respond when plans change.
Core Metrics to Track Alongside Utilization Benchmarks
Utilization is one of the most visible metrics in professional services, but it can't explain whether the business is actually performing well on its own.
A team can show strong utilization and still struggle with missed deadlines, thin margins, or resourcing problems. Utilization shows how time was used. It doesn't explain whether that time created the right outcome.
| Metric | What It Helps Answer |
|---|---|
| Project Margin | Are projects generating the expected profit? |
| On-Time Delivery | Are teams completing projects as planned? |
| Resource Availability | Do we have enough capacity and the right skills for upcoming work? |
| Planned vs. Actual Hours | Are project estimates realistic? |
| Revenue Forecast Accuracy | Can we predict future workload and revenue? |
| Bench Time | Is unused capacity caused by demand, planning, or skill gaps? |
SPI's 2025 benchmark, for example, reported 68.9% billable utilization alongside 73.4% on-time project delivery in 2024. Both numbers declined from the previous year, when utilization was 69.3% and on-time delivery was 75.7%.
That does not prove that lower utilization causes delivery problems. It does show why utilization should be considered alongside delivery performance rather than treated as a standalone score.
How Better Resource Planning Can Improve Utilization
Most firms can calculate utilization. The harder part is knowing what the number means and what to do next.
A team at 85% utilization may look healthy on paper, but that number does not show who is overloaded, where capacity is available, or whether the team can handle upcoming projects. Utilization becomes more useful when viewed alongside projects, workload, and capacity.
For example, TaskFord connects project planning with workload and capacity visibility, helping managers see how planned work affects team availability and delivery.
Better resource planning helps teams:
- See capacity: Know who is available, committed, or overloaded.
- Plan ahead: Compare upcoming project demand with available capacity.
- Spot gaps: Identify resource or skill constraints before assigning work.
- Balance workloads: Reallocate work when capacity is uneven.
- Improve future planning: Compare planned work with actual effort.
The goal is not simply to increase the utilization percentage. It is to use available capacity more effectively while keeping workloads sustainable and delivery predictable.
Read also: Capacity Planning vs. Resource Planning: What’s the Real Difference?
Conclusion
Professional services utilization is a useful measure of how firms use their available capacity, but there is no universal target. Benchmarks provide context, while the right target depends on the service model, project mix, and roles involved.
The key is to look beyond utilization alone. Capacity, workload, project performance, and future demand all help explain what the number really means.
Ultimately, the goal is not to keep everyone busy. It is to use capacity effectively while maintaining healthy workloads and predictable delivery.
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