A busy schedule can look profitable while individual jobs quietly lose money. Job costing gives a
service business a simple answer: after labor, materials, subcontractors, permits, and other
direct costs, what did this job actually earn?
The short version
Measure the work after the truck leaves.
- Use collected revenue, not the original estimate, as the revenue baseline.
- Record direct labor and every job-specific cost consistently.
- Compare gross profit and gross margin by service, technician, and lead source.
- Use the result to improve pricing and operations—not to blame the field team.
What job costing means for a service business
Job costing connects the money received for one job to the costs required to deliver it. For an
HVAC repair, that may include technician time, a capacitor, refrigerant, and a permit. For a
garage door installation, it may include the door, track, labor, disposal, and a subcontracted
electrician. The method stays the same even when the work changes.
Start with the amount the customer actually paid. Subtract direct costs that belong to the job.
The difference is gross profit. Divide gross profit by collected revenue to find gross margin.
Fieldiz provides a free job costing calculator
when you want to check a completed job without creating an account.
Simple formula: collected revenue − direct job costs = gross profit.
Choose a consistent set of direct costs
A useful report depends on consistent inputs. Decide which expenses belong directly to a job and
teach the office and field team to record them the same way every time.
| Cost | What to include | Common mistake |
|---|---|---|
| Labor | Paid time spent delivering the work, including job-specific helpers | Using billed hours instead of actual time |
| Materials and parts | Items installed, consumed, or purchased for the job | Forgetting small supplies and return-trip parts |
| Subcontractors | Job-specific outside labor or specialty services | Treating the full subcontractor bill as overhead |
| Permits and fees | Inspection, disposal, rental, and permit costs tied to the job | Recording them only when they are unusually large |
| Other direct costs | Parking, tolls, delivery, or equipment rented for that job | Mixing company-wide expenses into one job |
Keep overhead separate from direct job cost
Rent, software, insurance, management payroll, and general vehicle costs keep the company running,
but they usually do not belong to one specific visit. These are overhead costs. You still need to
recover them through pricing, but mixing them into job records inconsistently makes comparisons
unreliable.
One practical approach is to measure job-level gross margin first, then use a pricing model that
accounts for overhead and the company’s target margin. The free
service price calculator helps turn those
assumptions into a starting selling price.
Review margin by service, not only by month
Monthly revenue cannot show whether a particular service is healthy. Group completed jobs by
service category and compare average revenue, direct cost, gross profit, time on site, and return
visits. A service may produce high revenue but weak margin because it requires more labor or
callbacks than expected.
Look for patterns over enough jobs to be useful. One difficult installation should not determine a
new price book. A repeated gap between estimated and actual labor is a signal worth investigating.
Fieldiz keeps job expenses and job value connected
so the review does not depend on reconstructing the work from receipts and chat messages.
Turn the result into better decisions
-
Fix missing inputs. Make labor time and job expenses easy to record before
changing prices. -
Compare estimate to actual. Identify services where scope, time, or material
assumptions regularly drift. -
Update the price book. Adjust the repeatable service price instead of
improvising on every call. -
Coach the workflow. Reduce unnecessary return trips, unplanned parts runs, and
unclear handoffs. -
Recheck the next group of jobs. Confirm that the change improved the result
without hurting the customer experience.
A simple weekly job-costing routine
Review a small sample of completed jobs each week. Confirm collected revenue, technician time,
parts, and unusual costs. Flag incomplete records, then compare the services with the strongest
and weakest margins. Keep notes on the reason: pricing, scope, travel, a callback, a discount, or
a purchasing issue.
The goal is calm visibility. When leads, appointments, time, expenses, estimates, invoices, and
payments share one job record, an owner can improve the business from evidence instead of memory.
Explore job management and
estimates, invoices, and payments to see how
that connected workflow works in Fieldiz.
