How Many Billable Hours Should a Diesel Technician Produce?

How many billable hours should a diesel technician produce in a day?

For a full-time heavy-duty technician working an 8-hour day, about 6 billed hours per day is a useful starting benchmark. In a well-run shop, roughly 6.5 to 8 billed hours per technician per day can be a reasonable operating target, depending on job mix, technician efficiency, parts availability, approvals, diagnostics, and workflow.

That does not mean every diesel technician should be expected to hit the same number.

The more useful question is this: How much available technician time becomes productive job time, and how much of that job time becomes billed labor?

Understanding those numbers can show you whether your shop has a technician problem, a scheduling problem, a workflow problem, or simply a labor-capture problem.

What Is a Good Billable-Hours Target for a Diesel Technician?

There is no universal ATA, TMC, OEM, or government rule stating that every diesel technician must bill a specific number of hours per day.

The Technology & Maintenance Council benchmarks Standard Repair Times for common commercial vehicle maintenance tasks. Its 2025 study collected completion times for 103 commonly performed tasks to help establish repair-time baselines that can improve productivity and profitability.

That is different from prescribing one daily billed-hours quota for every technician.

Another useful reference comes from a City of Charlottesville fleet management assessment.

The assessment identified 75% of available labor time dedicated to actual wrench time as an appropriate productivity target for that fleet operation.

Apply 75% utilization to an 8-hour day:

8 available hours x 75% utilization = 6 job hours

That makes about 6 productive hours per 8-hour day a useful baseline.

For commercial repair shops using standard labor times, billed hours can be higher than actual wrench hours when technicians complete work efficiently.

Billable Hours vs. Available Hours vs. Job Hours

Before comparing technicians, define exactly what you are measuring.

Available hours are the hours a technician is available to perform shop work.

Job hours are the hours actually spent clocked onto repair and maintenance jobs.

Billed hours are the labor hours ultimately sold or invoiced to the customer.

These numbers are not interchangeable.

For example, a technician could be available for 8 hours, spend 6 hours actively working on jobs, and produce 6.6 billed hours.

That would represent:

• 75% utilization

• 110% efficiency

• 6.6 billed hours

Understanding the difference is critical because a technician can be highly efficient while working but still produce fewer billed hours if jobs are not ready, parts are missing, approvals are delayed, or assignments are poorly scheduled.

How to Calculate Technician Utilization and Efficiency

Two metrics explain most of the story.

Technician Utilization

Utilization = Job Hours / Available Hours x 100

If a technician is available for 8 hours and spends 6 hours clocked onto jobs:

6 / 8 = 75% utilization

Utilization tells you how much available technician capacity actually reaches repair work.

Technician Efficiency

Efficiency = Billed Hours / Job Hours x 100

If that technician spends 6 hours on jobs but produces 6.6 billed hours:

6.6 / 6 = 110% efficiency

A technician can legitimately exceed 100% efficiency when standard labor times are used.

For example, if a repair carries 3 billed hours and an experienced technician completes it in 2.5 job hours:

3 / 2.5 = 120% efficiency

That does not mean the technician physically worked more hours than existed in the day. It means the repair was completed faster than the labor time sold for the job.

The most useful formula for managers is:

Available Hours x Utilization x Efficiency = Billed Hours

Instead of asking only whether a technician "worked hard enough," this formula helps identify where capacity is actually being lost.

Diesel Technician Billable-Hours Benchmarks

The following is an illustrative operating framework, not an official industry standard.

For many heavy-duty repair shops, 6 billed hours per day is a useful baseline, while roughly 6.5 to 8 hours represents a stronger operating target.

But the number needs context.

A diagnostic technician working through difficult electrical faults should not automatically be measured against the same target as a technician performing repeat preventive maintenance jobs.

Mobile technicians also lose available shop time to travel and field conditions.

Your target should reflect the work your technicians actually perform.

What Does One Lost Billable Hour Cost Your Shop?

This is where technician productivity becomes a profitability issue.

Suppose your labor rate is $149 per hour.

If one technician produces one additional billable hour per workday across 22 working days:

1 hour x 22 days x $149 = $3,278 per month

For five technicians, that represents $16,390 per month of potential labor-revenue capacity.

For 10 technicians, it represents $32,780 per month.

These are capacity scenarios, not revenue guarantees. They assume sufficient customer demand, that the additional capacity can actually be sold and invoiced, and that the shop realizes the labor rate used in the calculation.

Your actual labor rate matters, which is why shops should evaluate labor rates and parts markup alongside technician productivity.

More importantly, a missing billed hour does not automatically mean a technician wasted an hour.

It could be 15 minutes waiting for approval, 20 minutes waiting on parts, 10 minutes between assignments, and another 15 minutes of completed labor that never reached the invoice.

That is why managers need to diagnose the missing hours before blaming the technician.

Low Utilization vs. Low Efficiency: What's the Problem?

Imagine two technicians who both produce 6 billed hours.

Technician A

6 job hours x 100% efficiency = 6 billed hours

Technician B

5 job hours x 120% efficiency = 6 billed hours

The output is identical, but the management problems are completely different.

Technician A has higher utilization but lower efficiency.

Technician B is extremely efficient once assigned to a job, but only gets 5 hours of an 8-hour day onto active repair work.

That second situation could indicate:

• Jobs waiting for parts

• Customer approval delays

• Poor scheduling

• Work not ready for the technician

• Gaps between assignments

• Too much administrative work

• An insufficient backlog of approved work

Pushing Technician B to "work faster" would miss the real problem.

Why Diesel Shops Lose Billable Hours

Lost labor usually happens in small pieces throughout the day.

Technicians forget to start a timer. A completed task never gets added to the work order. The next repair is waiting for parts. An estimate sits waiting for customer approval. A technician finishes one job but does not immediately have another parts-ready assignment.

By the end of the week, those small gaps become hours.

Accurate technician time tracking software helps managers separate productive job time from non-billable activity and compare actual labor with billed labor.

ShopView's Technician Utilization Report, for example, separates time punched onto work-order lines from internal activity and can assign a dollar value to non-billable hours.

That gives managers something much more useful than a simple "busy or not busy" judgment.

They can see where the time actually went.

How to Increase Billable Hours Without Pushing Technicians Harder

The goal should not be squeezing eight physical wrench hours out of every eight-hour shift.

A better goal is removing avoidable friction from the technician's day.

Start with five areas:

Capture time as the work happens. Job-level clocking reduces labor that disappears between the repair and invoice.

Keep parts-ready work available. A skilled technician waiting for a seal, sensor, or approval is unused capacity.

Schedule around workload and skills. Match the right technician to the right repair and have the next job ready before the current one ends.

Move approvals faster. Completed estimates sitting in an approval queue can leave both bays and technicians waiting.

Review actual vs. billed labor. If technicians spend enough time on jobs but billed hours remain low, investigate estimating, standard labor times, missed labor, rework, and invoicing.

For a deeper operational playbook, read how to improve technician efficiency in a heavy-duty repair shop.

How ShopView Helps Shops Capture More Billable Labor

The problem with technician performance data is that it often lives in separate systems.

Time punches are in one place. Work orders are somewhere else. Parts status is communicated verbally. Invoices are built later. Managers are left trying to reconstruct what happened.

ShopView connects technician activity directly to the repair workflow.

Managers can monitor technician utilization, identify non-billable activity, review job-level time, and see where available capacity is being lost.

ShopView also lets managers compare actual versus billed labor, helping identify whether worked hours are making it through the work order and onto the invoice.

That changes the management conversation.

Instead of asking, "Why aren't my technicians producing enough?"

You can ask:

Where did the hours go?

And that is a much more useful question.

Frequently Asked Questions

How many hours should a diesel technician bill per day?

About 6 billed hours in an 8-hour day is a useful baseline. A well-run heavy-duty shop may target roughly 6.5 to 8 billed hours depending on utilization, efficiency, job mix, parts availability, and workflow.

Can a technician bill more than 8 hours in an 8-hour day?

Yes. If a shop bills using standard repair times and a technician completes jobs faster than those standard times, billed hours can exceed physical job hours. This represents efficiency above 100%, not more than eight physical hours worked.

What is a good technician utilization rate?

There is no universal target appropriate for every commercial shop. A 75% utilization scenario is a useful starting reference, supported by a public fleet-management assessment that considered 75% wrench time appropriate for that operation. Your target should account for shop type, job mix, training, meetings, mobile travel, and other necessary non-job activity.

What is the difference between utilization and efficiency?

Utilization measures how much available technician time reaches jobs. Efficiency measures how effectively job time becomes billed labor. A technician can therefore have low utilization but high efficiency, or high utilization but low efficiency.

Should every diesel technician have the same target?

No. Diagnostic work, preventive maintenance, major repairs, fabrication, mobile service, technician experience, tooling, parts availability, and job complexity can all affect appropriate targets.

Find the Missing Hours in Your Shop

Billable hours are not just a technician metric.

They are the result of scheduling, parts availability, approvals, estimating, time capture, workflow, technician performance, and invoicing working together.

Start with the numbers:

Available Hours x Utilization x Efficiency = Billed Hours

Then investigate the gap.

Start your free ShopView trial to see how technician time, work orders, labor utilization, and shop performance can be managed in one connected workflow.

Prefer a guided walkthrough? Book a ShopView demo and see how ShopView can help your team find where billable hours are being lost.