Billable Hours vs Utilization Rate: The Metric Electrical Contractors Ignore
Take an example crew: 10 electricians paid for 400 hours a week and billing 280 of them are running a 70% utilization rate. The other 120 hours went to drive time, parts runs, and shop time. Some of that is the cost of doing the work. The rest is worth finding.
Most electrical contractors track billable hours religiously and never calculate utilization rate at all. That gap quietly decides whether a job clears margin.
Billable hours tell you what you invoiced. Utilization rate tells you how much of the labor you paid for actually earned revenue. This guide covers the difference, the formula, how to set a target, and exactly where the hours leak.
What's the Difference Between Billable Hours and Utilization Rate?
Billable hours are the hours you can charge a customer for. Utilization rate is the percentage of total paid hours that are billable — billable hours divided by every hour on the clock.
The distinction matters because the two numbers move independently. An electrician can log 35 billable hours and look productive, but if you paid them for 50 hours that week, their utilization rate is only 70%.
Track billable hours alone and you see revenue. Track utilization and you see efficiency — how hard each payroll dollar is working.
| Metric | What it measures | What it misses |
| Billable hours | Hours invoiced to a customer | The paid hours that earned nothing |
| Utilization rate | Billable hours ÷ total paid hours | Whether the billable rate itself is profitable |
How Do You Calculate an Electrician's Utilization Rate?
Divide an electrician's billable hours by their total paid hours, then multiply by 100. Example: 30 billable hours ÷ 40 paid hours = 75% utilization rate.
The formula is simple; getting clean inputs is the hard part.
Utilization rate = (Billable hours ÷ Total paid hours) × 100"Total paid hours" includes everything you write a check for: wrench time, drive time, shop time, training, and waiting on materials. "Billable hours" are only the hours that land on a customer invoice.
Worked example for a service electrician's week:
| Activity | Hours |
| Billable on-site work | 30 |
| Drive time between calls | 6 |
| Parts runs | 2 |
| Paperwork and shop | 2 |
| Total paid | 40 |
What's a Good Utilization Rate for Electricians?
There is no published benchmark for electrical crews, so set your target from your own history. As example starting points, not industry figures: a service electrician might sit around 65-75% and a project electrician around 75-85%. A rate far above your own normal deserves a look for rushed work or hours billed without backup, and one far below it points to scheduling or travel.
Service work carries more unavoidable drive time and dispatch gaps, so its benchmark sits lower. Project work keeps a crew on one site for days, so billable density should run higher.
| Role | Example starting target | Below target usually means |
| Service electrician | 65-75% | Too much windshield time or thin dispatch |
| Project / new construction | 75-85% | Material delays or crew sitting idle |
| Apprentice (mixed) | 60-70% | Normal — supervised learning time isn't billable |
Why Does Utilization Rate Matter More Than Billable Hours?
Billable hours can climb while profit falls — if paid hours climb faster. Utilization rate catches that leak because it measures revenue earned per dollar of labor paid, not just total revenue.
Picture two electricians who each bill 32 hours this week. One was paid for 40 hours (80% utilization); the other for 50 hours of overtime (64%).
Same billable output. But the second tech burned 18 paid-but-unbilled hours — and time-and-a-half on the overtime makes each of those hours cost 50% more.
A few points of utilization show up directly in gross profit, because labor is the largest cost you control on most electrical jobs.
That's why utilization, not raw billable hours, predicts whether you're underbidding. Accurate job costing starts with knowing your true utilization on past work.
Where Do Electrical Crews Lose Billable Hours?
Drive time, parts runs, waiting on materials, rework, RFIs, and end-of-day paperwork. How much of the day those take depends on your work mix; in the worked example above, 10 of 40 paid hours went to them.
Each leak hides in plain sight because it still gets paid:
- Drive time — the biggest service-side drain; un-batched calls pile up windshield hours. (See drive time vs wrench time.)
- Parts runs — a mid-job supply-house trip can take a big bite out of the day's billable time.
- Waiting on materials — a crew on a job that isn't staged is paid, idle, and unbillable.
- Rework — fixing a miscoded install or failed inspection is paid twice but billed once.
- Paperwork — timecards rebuilt from memory drift, so even real billable hours get lost.
How Do You Improve Your Crew's Utilization Rate?
Measure it first, then attack the single biggest leak — usually drive time or material delays. Don't try to fix everything at once; one fixed leak compounds across every electrician.
Practical moves that raise utilization without pushing burnout:
- Batch service calls by geography so a tech isn't crossing town twice a day.
- Stage materials the night before so crews start billing on arrival, not after a supply run.
- Capture time at the job, in real time instead of reconstructing it Friday afternoon — memory rounding erases billable minutes.
- Code drive time and shop time separately so the non-billable bucket is visible instead of buried.
- Review utilization weekly, per electrician, not monthly per company — a 60% tech is a coachable conversation, not a year-end surprise.
How Time Tracking Software Reveals Your Real Utilization Rate
Time tracking that codes every clock-in to a job makes non-billable time visible automatically. The paid hours not tied to a job are your utilization gap — measured, not guessed.
When an electrician clocks in and picks the job, every minute lands in a billable bucket. Hours that never get a job — drive time, shop time, parts runs — surface as the gap between paid and billable.
FieldTimesheet captures clock in/out with GPS and job selection right on a phone, so the data is accurate the moment it happens, not rebuilt from memory.
Because an admin can send the same hours to QuickBooks with one Sync to QuickBooks click, your utilization math runs on payroll-grade numbers — not a spreadsheet guess.
Want the dollar figure for your own crew? Run it through the labor cost calculator, or start with the full time tracking guide to set up job-coded hours from scratch.