Utilisation: the number that decides rent or own
Most fleets do not know their real utilisation. The ones that do make better decisions than the ones that guess.
We wrote about the five-year math earlier this year. This is the number underneath it, and it is worth its own post because most people quote it from memory and memory is generous.
What it is
Utilisation is the share of available working days a machine actually earns. Not days it was in your yard. Not days it was assigned to a job. Days it worked.
The reason it decides rent-or-own is simple: rental cost scales with use, ownership cost does not. An owned machine costs you nearly the same whether it works 40 days or 240. A rented one costs you 40 days or 240.
Why the number you remember is wrong
- You remember the busy season. The machine that ran flat out in July did not run in February, and the year has both.
- Assigned is not working. A machine sitting on site waiting for the next phase is not earning.
- The meter counts idle. Hours are not utilisation — a machine can log a full day at a gate.
- You remember the day you needed it and did not have it. That day is real, but it is one day, and it is doing far too much work in your decision.
Get the real one
- Pick a machine and a full yearTwelve months. A quarter will tell you about a season, not a machine.
- Count the days it actually workedTimesheets, site diaries, hour meter readings — whatever you have that is a record rather than an impression.
- Divide by available working daysRoughly 250 in a year, adjusted for how your business actually runs.
- Sit with the answerIt is usually lower than expected. That is not a failure. It is what fleets look like.
What to do with it
High and steady — own it. The machine is part of how your business works, and paying a day rate for it 200 times a year is the expensive way.
Low — rent it, and stop feeling bad about it. A machine at low utilisation is capital sitting in your yard depreciating on a schedule that does not care whether it worked.
Lumpy — own the baseline, rent the peaks. This is what most contractors land on, and it is not a compromise. It is the right answer for a business whose work changes shape.
The one adjustment worth making
If a machine being unavailable costs you a contract rather than a day, its true value is higher than its utilisation suggests. That is a real argument for owning. It is also the argument people use to justify every purchase they already wanted to make — so be honest about which one you are having.
