Most agencies know their revenue. Far fewer know the real profitability of each project. The difference between the two comes down to time tracking. When you know exactly how many hours each project consumes, you can calculate precise margins, spot overruns, and make informed decisions. Here's how to set up this winning combination.
À retenir
- Revenue alone does not reveal the real profitability of a project.
- Simple and well-explained time tracking gets adopted by the whole team.
- Time data transforms future estimates into reliable decisions.
Why revenue alone isn't enough
A project billed at 15,000 euros looks profitable. But if your team spent 300 hours instead of the 150 estimated, with an average internal cost of 60 euros per hour, that project actually cost you 18,000 euros to deliver. You lost 3,000 euros. Without time tracking, you'll never know. You'll keep accepting similar projects at the same price, and your margin will continue to erode.
Profitability must be calculated project by project, not as an overall average. A client who accounts for 30% of your revenue but consumes 50% of your hours is a client who's holding back your growth. This truth is invisible without reliable time data.
How to calculate the real margin of a project
The calculation is simple in principle, but it requires data that many agencies don't collect:
- Project revenue: total amount billed to the client
- Internal cost: hours spent multiplied by each team member's internal hourly rate (loaded salary divided by annual productive hours)
- External costs: subcontracting, licenses, project-specific purchases
- Gross margin: revenue minus internal and external costs
- Margin rate: gross margin divided by revenue, as a percentage
A healthy margin rate for a service agency is between 40% and 60%. Below 30%, the project isn't viable in the long run. Above 60%, you're probably understaffed and on the edge of burnout. The goal is to maintain a consistent and predictable margin, not to maximize every single project.
Implementing time tracking without alienating your team
Time tracking has a bad reputation. Many team members see it as a surveillance tool, an attack on their autonomy. And they're not wrong when it's poorly implemented. Punitive time tracking used to single out "poor" performers is counterproductive. Here's how to approach it differently:
Explain the why before the how
Before deploying a tool, gather your team and explain the purpose. It's not about monitoring — it's about understanding where time goes so you can better estimate projects, negotiate prices, and catch projects going off track before it's too late. When a team member understands that time tracking also protects their workload balance, resistance drops.
Make tracking as simple as possible
If tracking time requires opening a separate tool, searching for the right project in a list of 200 entries, and filling in five fields, nobody will do it. Time tracking must be built into your task management tool. A "start" button on each task, a running timer, and a stop when you switch to something else. Two clicks, no more.
Accept initial imprecision
The first few weeks, the data will be imperfect. Forgotten entries, rough estimates, misassigned tasks. That's normal. What matters is building the habit. After a month, the data becomes reliable. After three months, it becomes strategic.
Time tracking is not a control tool. It's a knowledge tool. Knowing your real cost per project is the difference between steering your agency and being at its mercy.
Turning data into decisions
Having time data is useless if no one analyzes it. Here are the metrics to track every month:
- Margin per project: identify which projects are profitable and which aren't. Look for patterns. Is it a project type? A client? A project manager?
- Utilization rate: percentage of time spent on billable vs. non-billable tasks (internal meetings, admin, training). A healthy rate is between 65% and 80%.
- Estimate vs. actual variance: systematically compare estimated time to actual time. If a task type is consistently underestimated, adjust your benchmarks.
- Profitability per client: some clients are more demanding than others. Those who request many revisions, meetings, or unbilled support drag down your margin even when the quote seems right.
The impact on estimating future projects
After six months of time tracking, you'll have a valuable database for estimating upcoming projects. You'll know that a showcase website redesign takes an average of 120 hours, that the QA phase always represents 20% of total time, and that projects with more than three client-side contacts take 30% more time.
This data allows you to price more accurately, negotiate better with clients, and turn down projects whose budget is clearly insufficient. It's a virtuous cycle: more precise estimates lead to better-calibrated projects, which in turn generate even more reliable data.
Time tracking and profitability are inseparable. One without the other is of little use. Together, they transform your agency from a structure that works a lot into one that works well. And that's the difference that ensures the long-term success of a service business.