The bench is not idle time. It is unpriced cost.
Every firm watches utilisation, but most treat the bench as a number to apologise for rather than a cost to place. The team you pay for is largely fixed; the hours that are not billed do not disappear, they land somewhere. If they never reach the project or client that required them, every engagement reads cheaper than it is, and the lever that should lift margin stays invisible.
Cost and Profitability Consulting · 150+ models since 2010 · TDABC
Practical capacity is 80 to 85 percent of theoretical hours once leave, training and ramp are removed. The bench is real cost, not idle time, and it has to land on the work that caused it. Get utilisation right and the lever is powerful: a 5-point gain typically lifts operating margin by 3 to 5 points, because the team's cost is largely fixed.
Cost against the wrong capacity flatters everything.
Cost a team against its theoretical hours, every working minute in the calendar, and the cost per hour comes out too low, because nobody delivers every minute. Leave, training, internal work, admin and the gap between projects all eat into it. The hours that remain are practical capacity, and they are the only honest base for a rate. Use the theoretical number and the bench simply vanishes into a rate that looks competitive and is not.
| Per consultant | Team A | Team B |
|---|---|---|
| Billable utilisation | 78% | 68% |
| Bench & non-billable | 22% | 32% |
| Cost recovered by billing | High | Thin |
| Operating margin gap | — | −6 to −9 pts |
Ten points of utilisation between two otherwise similar teams can be six to nine points of operating margin, once the bench lands where it belongs.
Price the capacity, then place it.
Measure practical capacity
Strip leave, training, admin and ramp to get the hours a team can really deliver. Cost per minute comes from that, not from a full calendar.
Price the bench
The gap between practical capacity and billed work is a number. It is the cost of readiness, and it belongs on the projects and clients that require fast response, not spread evenly.
See it by team
Bench is rarely uniform. One squad carries it; another runs hot. The model shows where capacity is genuinely tight and where it is quietly unfunded.
Act on the lever
Re-mix work, re-skill, or reprice the readiness clients value. A few points of utilisation, found and held, move the margin more than another round of rate increases.
Frequently asked questions
- What is practical capacity in a services firm?
- Practical capacity is the time a team can realistically deliver, usually 80 to 85 percent of theoretical hours once leave, training, admin and ramp are removed. Costing against theoretical capacity understates the real cost per hour and hides the bench.
- How does utilisation affect margin?
- A 5 percentage-point gain in billable utilisation typically lifts operating margin by 3 to 5 points, because the cost of the team is largely fixed and more of it is now carried by billable work. Utilisation is the lever, but only if you can see where the unbilled hours go.
- Is the bench always bad?
- No. Some bench is deliberate: capacity held for fast response, ramp before a known project, or skills you are building. The problem is unpriced bench, time that never lands on the work or client that required it, so every engagement looks cheaper than it is.
Put a number on the bench, then move it.
The Profit Check takes five minutes and no data upload. It shows where unpriced capacity is most likely sitting, and what closing the gap is worth.