Working hours and billable hours are not the same thing
Working hours are the time you spend running the business. Billable hours are the subset you can legitimately charge to clients. The gap includes sales, proposals, scheduling, invoicing, bookkeeping, marketing, learning, internal systems, project gaps and other business activity.
If you price as though every working hour is billable, each real client hour carries too little of the annual revenue requirement. That can create a business that feels busy but still misses its income target.
The utilisation formula
For example, 46 working weeks × 40 hours = 1,840 working hours. At 60% utilisation, that becomes 1,104 billable hours.
How much the assumption changes the rate
The table keeps every other assumption fixed: €50,000 desired income, €8,000 annual expenses, 46 working weeks, 40 hours per week and a 10% buffer.
| Billable utilisation | Billable hours/year | Calculated rate |
|---|---|---|
| 40% | 736 | €86.68/h |
| 50% | 920 | €69.35/h |
| 60% | 1,104 | €57.79/h |
| 70% | 1,288 | €49.53/h |
| 80% | 1,472 | €43.34/h |
The annual revenue target did not change. Only the number of hours available to earn that revenue changed. That is why utilisation is not a minor detail.
Estimate utilisation from real work instead of wishful planning
If you already track time, use a multi-month average that includes both busy and quiet periods. If you do not, start by separating time into billable client delivery and everything else.
Typical non-billable categories to track
- Lead generation, discovery calls and proposals that do not become paid work.
- Administration, invoicing, bookkeeping and tax preparation.
- Marketing, portfolio work, content and networking.
- Learning, tool maintenance and internal process improvements.
- Unpaid project gaps, rescheduling and client delays.
- Out-of-scope revisions that you choose not to bill.
Do not confuse utilisation with occupancy
You can be fully occupied without being highly billable. A week full of proposals, support messages, admin and internal work may feel packed while producing few invoiceable hours. Utilisation is useful precisely because it forces you to distinguish activity from revenue-producing capacity.
Likewise, high utilisation is not always better. If you invoice nearly every working hour for long periods, you may have too little room for sales, systems, rest and future pipeline work. The goal is a sustainable operating range, not a maximum score.
Use utilisation to diagnose a pricing problem
If your effective income is below target, do not assume the hourly rate is the only issue. Compare planned and actual utilisation.
- If the rate is adequate but utilisation is low, focus on pipeline, scope control or project scheduling.
- If utilisation is healthy but income is still low, the rate or project price may be too low.
- If both are weak, raising the rate alone may not solve the business problem.
- If utilisation is extremely high, consider whether the business needs more buffer, higher prices or protected non-client time.
Why 100% billable is usually a poor planning default
One hundred percent utilisation assumes every working hour is chargeable and paid. That leaves no modeled time for selling, administration, learning, gaps, internal work or normal operating friction. It can be mathematically valid for a narrow contract period, but it is generally a fragile annual business assumption.
Convert hourly planning into project capacity
Once you know your annual billable hours, you can use the number as a capacity budget. If the model gives 1,104 billable hours per year, a 100-hour project consumes about 9% of that annual billable capacity. That makes it easier to judge whether a project price contributes enough to the yearly target.
Use the freelance hourly rate calculator to test your own utilisation assumptions and the pricing guide to translate the internal rate into a commercial quote.