Utilization rate: How to calculate it (with real examples)

Utilization rate is one of the most important metrics in professional services. But it’s often misunderstood. 

At its core, it shows how much of your team’s available time is spent on billable work. Get it right, and you have a clear view of revenue potential, team capacity, and operational health. Get it wrong, and you risk missed revenue, delivery delays, or team burnout. 

In this guide, I’ll show you how to calculate utilization rate step by step, see real examples you can relate to, and understand how to use the metric in a smart, balanced way that improves performance without creating unhealthy pressure.

What is utilization rate?

Utilization rate is the percentage of available hours that are spent on billable work during a specific time period. In professional services, it is the primary metric for measuring workforce efficiency and revenue capacity. It tells you whether you’re staffing and scheduling in a way that matches demand, and it gives you an early warning when you’re overloading people or underusing skills.

Utilization vs billable utilization vs capacity utilization 

Here’s the clean way I separate them, so everyone is looking at the same metric:

When to use which: 

• Project managers: Resource utilization for delivery health and workload balance. 

• Finance: Billable utilization for revenue capacity and margin drivers. 

• Ops / resourcing: Capacity utilization to spot systemic under or over allocation. 

Utilization rate formula and what each variable means

The core utilization rate formula is: 

Utilization rate (%) = (used hours ÷ available hours) × 100 

Where used hours depend on which utilization rate you’re calculating: 

• Billable hours: Time you spend working for a client that you charge for or can charge for. 

• Productive hours: Work that moves projects forward, including productive non-billable categories if you track them. 

• Available hours: Hours the person could realistically work in that period, after adjusting for time-off and public holidays. 

How to calculate utilization rate step by step 

This is the workflow I’ve seen work best across client services teams because it keeps the math consistent and the conversations productive. 

Step 1: Define the measurement window 

Pick a time window and stick to it. 

• Weekly:  Best for making short-term decisions, like prioritizing workloads, updating project plans, and spotting overload early. 

• Monthly: Better for trends and reporting, but it can hide problems until they’re already expensive. 

• Quarterly: Good for planning and staffing, but too slow for day-to-day management. 

Step 2: Set available hours correctly 

Your calculation is only as good as your definition of availability. Here’s how I standardize it: 

• Start with contractual hours: For example, 40 hours/week full-time, 20 hours/week part-time. 

• Subtract PTO and public holidays in the period: If someone takes 8 hours PTO that week, their availability is 32 hours (not 40). 

• Handle part-time schedules: Don’t normalize part-time people to full-time unless you’re doing a separate planning model. 

   

• Treat parental leave and long-term leave as zero availability:  They shouldn’t be in the denominator. 

• Be consistent about training and internal meetings: Either keep them in availability and treat them as used hours or exclude them from availability and accept that your utilization rate will look higher. 

Step 3: Separate billable, non-billable, and productive non-billable 

Not all non-billable time is wasted time. To get a true picture of utilization, it helps to split work into three categories: billable, non-billable, and productive non-billable. 

• Billable: Work you do for a client that you charge for or can charge for. 

• Productive non-billable: Work that improves delivery outcomes but isn’t billed. 

• Non-billable overhead: Admin, internal meetings, general ops, and unproductive time. 

Step 4: Run the calculation and sanity-check it 

After you calculate utilization, I do quick checks before I act on it: 

• If someone is at 100%+ for multiple weeks, something is off. Either the person is overloaded, PTO is missing, or available hours is wrong. 

• If a whole team is consistently at 90%+ billable, quality will usually dip. There’s no room for rework, coordination, or unexpected client needs. 

• If utilization is low but the team feels busy, your categories are probably messy. Time is going somewhere; you just can’t see it clearly. 

Utilization rate example

Example 1: Individual billable utilization  

A consultant is full-time (40 hours/week). This week they take 1 day PTO (8 hours). They log 24 billable hours. 

• Available hours = 40 − 8 = 32 

• Billable utilization = (24 ÷ 32) × 100 = 75% 

Interpretation: 75% billable utilization is often healthy for an individual contributor, depending on how much non-billable work your team expects. If you want this person at 85%+ every week, you’re saying do almost everything billable, which usually pushes important work into evenings or into incorrect time categories. 

Example 2: Team capacity utilization  

You have a 4-person team: 

• 2 delivery specialists at 32 available hours each (after PTO/holidays) 

• 1 senior lead at 32 available hours 

• 1 manager at 32 available hours 

Total available hours = 32 × 4 = 128 

This week the team logs: 

• 88 billable hours (client delivery) 

• 20 productive non-billable hours (QA + enablement) 

• 10 overhead hours (admin) 

Total used hours = 118 

Now you can calculate different utilization rates: 

• Billable utilization: (88 ÷ 128) × 100 = 68.75% 

• Resource utilization: (88 + 20) ÷ 128) × 100 = 84.38% 

Interpretation: The team is busy, with 84% of their time spent on productive work, even though billable utilization is only 69%. That’s why I track both numbers. If you look at billable hours alone, a healthy team can seem underused. It can also hide the fact that your projects need more non-billable work than leaders realize. 

What is a good utilization rate?

A good utilization rate depends on role, seniority, and how much internal work your business needs to stay healthy. I avoid universal benchmarks because they create bad behaviour. Instead, I use a simple green/yellow/red interpretation that keeps the conversation grounded: 

A practical green/yellow/red framework 

Green (generally healthy) 

• Individual contributors (ICs): Often 70% to 85% billable. 

• Managers/Directors: Often 40% to 60% billable (because leadership, planning, and client management take time) 

Yellow (watch closely) 

• ICs consistently below target: Possible pipeline gap, misallocation, or skills mismatch. 

• ICs consistently above target: Risk of mistakes, missed deadlines, and burnout. 

• Managers/Directors above 70% billable for long periods: Leadership work is getting squeezed out. 

Red (take action now) 

• Sustained 90%+ billable for most roles: You’re likely running without buffer. 

• Sustained very low utilization with no strategic reason: You’re paying for capacity you’re not using. 

What utilization rate tells you and what it doesn’t

Utilization rate is helpful because it’s quick to see. It gives you an early warning about workload, staffing needs, and pressure on your team. 

What high utilization can mean 

• Demand is strong and work is flowing. 

• You’re overbooking and running out of buffer. 

• You’re under-hiring or under-staffing for the work you’ve sold. 

What low utilization can mean 

• Pipeline gaps, slow sales handoffs, or delayed project starts. 

• Misallocation (work exists, but not for the right skills). 

• People stuck on internal work that isn’t labelled cleanly. 

What it does not tell you  

• Profitability: High utilization can still be unprofitable if rates are wrong or scope is leaking. 

• Quality: Teams can hit targets while shipping rework. 

• Scope creep: A project can be busy and still be off plan. 

Common utilization rate mistakes

These are the common pitfalls I see in services teams, especially as they grow and manage more projects at the same time. 

Mistake 1: Not adjusting for PTO.

• Problem: If PTO and public holidays aren’t handled consistently, utilization becomes a vanity metric.  

• Solution: Documenting your availability rules and applying them automatically.

Mistake 2: Ignoring “non-billable” value 

• Problem: Some non-billable work protects quality and future capacity. If you punish it, teams hide it. 

• Solution: Separating productive non-billable work from true overhead and explaining why some non-billable time is valuable. 

Mistake 3: Creating a “burnout culture” 

• Problem: If utilization targets are tied to performance without context, time gets fixed to look good. I’d rather have a lower utilization rate I trust than a high one I can’t use for decisions. 

• Solution: Using utilization as a planning tool, not a simple performance score, and reviewing it together with context. 

Mistake 4: Using utilization to judge individuals without context 

• Problem: Utilization depends on things like the types of projects people are on, how work is handed off, when deals close, and how the team is staffed. If you use it to judge one person on its own, you may blame them for problems caused by the system. 

• Solution: Reviewing utilization alongside workload, role, and project assignment so you evaluate the system, not just the individual. 

Mistake 5: Ignoring seasonality and project mix 

• Problem: Some months are heavy on delivery, others are heavy on pre-sales, onboarding, or internal work.  

• Solution: Tracking trends over time and planning for busy and slower periods instead of reacting to short-term changes. 

How to improve utilization rate without burning out your team

If I’m trying to improve utilization, I focus on the system, not on squeezing more hours out of people. 

Fix the demand side  

• Make sales handoffs capacity aware. Don’t sell start dates you can’t staff. 

• Reduce stop-start work. Paused projects destroy utilization because they fragment schedules. 

• Kill phantom work. If work is happening but not tracked or not approved, it’ll show up as chaos, not utilization. 

Fix the supply side  

• Match the right skills to the right work. Low utilization is often a skills mismatch, not a lack of work. 

• Reduce context switching. Spreading someone across five projects looks “fully utilized” on paper, but it increases coordination overhead and slows delivery. 

• Act early on under and over allocation. Waiting until month-end is how teams drift into burnout. 

Fix the delivery system  

• Tighten estimates and protect focus time. Better estimating reduces hidden unbillable rework. 

• Use change control to stop unbillable creep. If the work changes, the plan and project budget must change too. 

Fix time capture hygiene  

• Make time tracking low friction. People won’t do it well if it’s painful. 

• Define categories clearly. Especially productive non-billable versus overhead. 

• Use a weekly approval cadence. I’ve found weekly review is the sweet spot: soon enough to fix issues, not so frequent that it becomes bureaucratic. 

Pro tip: Stop “phantom work.” If your team is busy but utilization looks low, you likely have a “leaky bucket” where billable tasks are being logged as admin.  

How project managers should track utilization each week 

This is the project management playbook version. It’s simple, repeatable, and it keeps utilization from becoming a once-a-month surprise. 

Monday: Check planned vs available capacity 

• Confirm who’s available this week. 

• Compare planned allocation versus availability. 

• Flag risks early: Anyone projected above 90% billable or below your baseline target. 

Mid-week: Spot overages early 

• Look for early signs of scope creep or underestimated work. 

• If someone is trending toward overload, I rebalance work immediately: swap tasks, shift deadlines, or renegotiate scope. 

Friday: Review, investigate, update 

• Validate timesheets, especially missing or oddly round entries. 

• Review utilization by role and by project. 

• Update your forward-looking forecast and make the next week’s allocation changes while context is fresh. 

Best software to track utilization 

Spreadsheets can work when your team is small. I’ve used them myself. But over time, problems start to show up. Different versions get shared, formulas break or change, time entries come in late, and you end up arguing about the spreadsheet instead of making real decisions. 

When I evaluate utilization tracking software, these are the things that matter most to me: 

• Time tracking compliance: Can people log time quickly, and can you see what’s missing? 

Teamwork.com’s time tracking allows you to log in time directly, send time reminders, create timesheets, mark time as billable, and paint a clear picture of where your team is spending their hours. 

• Billable vs non-billable labelling: Can you define categories that match how your business runs?  

In Teamwork.com your billable and non-billable hours are clearly defined so you know exactly where your team’s time goes. 

• Allocation vs actual: Can you compare planned work to actual time. So, utilization is actionable. 

In Teamwork.com, you can compare tasks and milestones against their original scope using the Planned vs Actual Tasks Report feature, helping you see what’s on track and plan your work more accurately. 

• Real time utilization reporting: Can you get an instant roll-up of utilization by person, team, or project? 

With Teamwork.com, instead of waiting until the end of the month to see a “lagging” metric, you can see real-time trends to rebalance workloads before the team hits a breaking point. 

• Profitability tie-ins: Can you connect utilization to budgets, rates, and margin without building a separate finance model? 

Teamwork.com’s cost profitability management feature helps you estimate effort and costs upfront, so you can create accurate, reliable quotes. You can also track budgets in real time and forecast future costs, giving you full visibility into where your money is going at every stage of the project. 

• Integrations: Does it connect to your calendar, finance stack, and the tools your team actually uses? 

Integrate Teamwork.com with the tools you already love. Connect your team’s messaging, accounting, CRM, cloud storage, and more so everything is at your fingertips. 

FAQs about utilization rate

What’s the difference between utilization and capacity utilization? 

Utilization usually refers to an individual’s used hours versus available hours. Capacity utilization is the same idea rolled up across a team or organization to show how much of total available capacity is being used. Capacity utilization is helpful for staffing and forecasting, but it can hide extremes if you only look at averages. 

Can utilization rate be too high? 

Yes. When utilization stays very high for a long time, it usually means there is no room for rework, meetings, or unexpected client requests. Over time, this can lead to missed deadlines, lower quality work, or burnout. If I see billable utilization above 90% for a long period across roles, I see it as a warning sign and adjust workloads before it turns into a bigger problem. 

How do I improve utilization without adding more hours? 

I start by fixing the system. That means improving how sales hand off work, planning demand better, and assigning work based on real capacity. I also try to reduce task switching, control project scope more tightly, and clean up time tracking so we can clearly see where time is going.