Many organizations focus on turnover, margins, and customer satisfaction — but forget one crucial link: billability. How many hours are actually invoiced? How much value is leaking away in meetings, administration, or vaguely defined work?
Key insights
- Billability is the percentage of hours worked that is directly billable to customers
- Low billability costs you immediate revenue and puts pressure on margins
- Factors such as time tracking, planning, project scope, and focus are crucial
- Tools like time registration and reports help with analysis and optimization
- Minor process improvements can result in dozens of additional billable hours per employee per month
What exactly is billability?
Billability is the percentage of time worked that can be invoiced to customers. If you work 40 hours a week, including 28 on customer projects, your billability is 70%.
High billability means your team delivers value efficiently — and thus generates more revenue. Low billability can indicate that too much time is lost on non-billable tasks, such as internal meetings, administration, or unclear planning.
For consulting firms, IT service providers, marketing agencies, and other project-based organizations, this is a critical KPI.
📚 Learn more aboutthe difference between billability and productivity.
Why billability matters
Billability isn't just a boring number from a spreadsheet — it tells you exactly how efficiently your team works and how much value you're actually delivering. A percentage that is too low affects your turnover, planning, and team dynamics. Read on to find out why this KPI is indispensable for any service organization.
Direct effect on turnover
Every hour not spent on a client project is literally lost revenue. At an average hourly rate of €100, just five unbillable hours per week quickly add up to more than €20,000 in missed annual turnover per employee. At scale—with multiple employees or teams—that amount grows rapidly and hits your bottom line.
Insight into capacity
Low billability often indicates underutilized capacity. Someone might be busy, but they are working on tasks that cannot be billed. By making this clear, you can make better decisions regarding your planning, resource allocation, and the balance between billable and non-billable work.
An early warning system for imbalances
If an employee has consistently low billability, it is almost never a coincidence. It can indicate a mismatch between role and responsibilities, too much internal work, or simply a lack of focus. Precisely because billability is a measurable metric, you can use it as a neutral starting point to discuss workload, role distribution, and effectiveness.
Low billability: 7 causes
Low billability is rarely the result of laziness or unwillingness. These are the most common causes that prevent valuable hours from ending up on an invoice—and therefore have a direct impact on your bottom line.
1. No or incomplete time trackingYou cannot improve what you do not measure. Without reliable tracking, you miss out on understanding where time is actually being spent.
2.2. Too many internal tasksThink of long meetings, ad-hoc discussions, or aimless internal projects.
3. Poor project planningUnrealistic time estimates, too many parallel tasks, or unclear roles result in lost time.
4. No clear project scopeVaguely defined client projects lead to ambiguous work and hours that cannot be billed.
5. Loss of focusSwitching between tasks or multitasking reduces the likelihood that employees can put in 'deep' billable hours.
6. Low productivity due to tools or context switchingJumping from tab to tab, searching for information, and poor integrations all add up.
7. Unclear communication with the clientIf you don't have a clear agreement on what is and isn't billable, time remains uninvoiced.
How to increase billability
Do you want to work more efficiently and increase revenue without putting extra pressure on your team? Then focus smartly on billability. This step-by-step plan will help you get started right away.
1. Map out current billability
Use reports or real-time dashboards to see:
- What the average billable percentage is per team, person, and project
- Which non-billable tasks take up the most time
- How that trends over weeks/months
2. Track every business day
Make sure employees record their hours every day, including breaks, internal time, and client work. The more specific, the better.
📚 This is how to motivate employees to record their hours.
3. Minimize internal time
Analyze which internal processes take the most time (meetings, reports, onboarding, etc.) and ask critical questions:
- Does this meeting really need to be held weekly?
- Can this task be automated?
- Can we delegate or bundle this?
Automate where possible, for example with an APIlinks between planning, tasks and time tracking.
4. Improve project scoping
Ensure projects have a clear deliverable, deadline, and time estimate. This is how you prevent scope creep—where employees perform work that no longer falls within the original plan.
Tip: document agreements with customers regarding what is and isn't billable, and keep this information centrally available to the entire project team.
5. Facilitate focus & deep work
Limit context switching:
- Schedule billable work in blocks of at least 90 minutes
- Turn off notifications during deep work
- Avoid unnecessary task switching
6. Evaluate with the team
Raise awareness: discuss billability in monthly team meetings. Address instances where someone falls short on billable hours—not to assign blame, but with an eye toward improvement.
7. Make billability part of your KPIs
Link billability to performance indicators—but only when the context is right (role, customer type, function). Not every employee has the same potential for billable time, so differentiate accordingly.
Example: the difference that 5% makes
Suppose your team consists of 10 consultants with an average rate of €100 per hour and works 40 hours a week. A 5% increase in billability means:
- 2 additional billable hours per employee per week
- 20 extra hours per week for the team
- 1,000 additional billable hours per year
- €100,000 extra revenue — without working more hours
Tools that make a difference
A good time tracking tool is the backbone of your billability. With TimeChimp, you have:
- Direct insight into billable vs. non-billable work
- Automatic links with projects, planning, and billing
- User-friendly registration via desktop, app, or timer
- Smart reports per employee, team, or project
- Link to budgets for real-time progress
Brief summary
Billability is a direct lever for revenue, efficiency, and customer value. By focusing, minimizing internal time, and registering properly, you increase billability without extra workload. Small adjustments make a big difference.
- Billability = percentage of billable time
- Factors such as scope, planning, focus, and tools are decisive
- Analyze and improve step by step — with data as a basis
- TimeChimp helps you streamline this process easily
👉 More control over billability and planning? Try TimeChimp for free and learn how to get more out of every hour worked.
FAQs
Productivity measures how many hours an employee has worked compared to their contract hours, while declarability is the proportion of those hours that are actually billable — in other words, how much of the time worked is charged to customers. You can read more about this in this blog.
Focus on smart process improvements, such as:
- Daily and detailed time registration
- Fewer meetings and better planning
- Clear project scopes
- Automation of internal tasks
Small adjustments can quickly result in dozens of additional billable hours per month — without employees having to work anymore.
Use a tool like TimeChimp to:
- Billable vs. non-billable hours to be monitored in real time
- Generate reports per team, project or employee
- Analyze trends over weeks/months
Also, make sure you define what is and what is not declarable, so that your figures are unambiguous.
