What are the three time measurements that determine your labour efficiency?
There are three distinct numbers to track, and confusing them is where most trade businesses quietly lose money.
- Hours on site: the moment your tradesperson arrived at a job to the moment they left that job.
- Billable hours: the hours you quoted or allowed for each task using your shopping list pricing system. This is the time you are actually charging the client for.
- Hours worked: from the time your tradesperson started their working day to the time they finished, covering travel, multiple jobs, and everything in between.
The gap between these three numbers tells you exactly where your profit is going.
How does labour efficiency actually get calculated?
Job efficiency is billable hours divided by actual hours on site. If your tradesperson was on site for six hours but you billed for twelve, job efficiency is 150% and your effective rate for that day rises to $225 an hour on a $150 charge-out rate.
Overall labour efficiency divides total billable hours for the week by total hours worked across the whole team. A tradesperson can run at 130 to 200% job efficiency on the tools, but once you factor in travel gaps, callbacks, sick days, and unfilled schedule slots, overall efficiency for the week might land between 95% and 105%. Hitting 100% overall means you are billing for the profit you priced for. Drop below that and you start losing money.
Why is labour the place you lose money, not materials or subcontractors?
Materials are hard to lose on because you have a purchase order and you apply a markup. Subcontractors send you an invoice and you mark that up too. The mistakes that cause losses in those areas come down to not communicating a price change or not accounting for items, and those are visible.
Labour is invisible. Your team can be busy every single day, yet if the hours they spend on site are not matching the billable hours you quoted, that gap costs you money without triggering any obvious alarm. Not billing for even one hour can wipe out nearly all of the profit for that day. Conversely, billing an extra hour through efficiency can double your profit on jobs with tight margins.
How do you track this with a calculator or job management system?
The labour efficiency calculator works as a weekly worksheet. For each person and each day you enter hours on site, billable hours, and hours worked. The calculator collates everything into a job efficiency figure and an overall labour efficiency figure for the week.
You can run this retrospectively by going back over the previous week and entering the data. The value is in identifying patterns: tasks where you consistently lose time, days where the schedule was not filled, and team members who may need different job allocations.
If you are using a job management system such as SimPro, the labour productivity report pulls all three metrics automatically for any time period. The key check before sending any invoice is to confirm that billable hours are equal to or above actual hours on site. If they are not, talk to the tradesperson before the invoice goes out, because that is when you find out about forgotten job notes, extra work that was not communicated to the client, or tasks that are consistently taking longer than the time you have allowed.
How do you handle apprentices in the efficiency calculation?
An apprentice is weighted as a decimal of a full billable resource based on their charge-out rate relative to a qualified tradesperson. If your qualified tradesperson charges out at $150 and your apprentice at $75, the apprentice is a 0.5 resource.
In practical terms, if a qualified tradesperson and a 0.5 apprentice are both on site for two hours, the actual hours count as three hours (two for the tradesperson plus one for the apprentice at 0.5). For hours on the tools, enter the apprentice's hours at half as well, otherwise the calculator figures will be skewed.
For a first-year apprentice who is not yet contributing meaningfully, setting them at zero for the first couple of months is reasonable. The important thing is to be aware of the drag on billable efficiency, because your tradesperson is spending time training rather than completing tasks at full speed. Tracking it lets you make informed decisions about which tradesperson to pair with the apprentice based on who maintains the best efficiency together.
What do you do when efficiency is below 100%?
If overall labour efficiency is sitting at something like 76%, the problem is rarely the tradespeople performing poorly on the tools. The more common causes are an unfilled schedule, incorrect pricing, too many callbacks, or too much leave and sick time reducing the hours you were able to bill.
The calculator will show you the pattern. Once you can see whether the problem is job-level efficiency (tradespeople taking longer than allowed) or schedule-level efficiency (not enough billable hours in the day), you can address the right thing rather than guessing.
