Free job costing calculator
Job Costing Calculator for Contractors
This calculator compares job revenue against real field costs so contractors can see gross profit, margin, and whether a completed or proposed job is priced correctly.
Use it after a job closes, before approving a large quote, or when a high-revenue project still feels less profitable than expected.
Check job profit from the costs that actually happened
Enter revenue, labor hours, labor cost, materials, equipment, subcontractors, overhead, and payment fees to calculate total cost, profit, and margin.
How it works
How job costing is calculated
The calculator adds direct and allocated costs, subtracts them from job revenue, then shows profit and margin percentage.
1
Add direct labor
Labor hours multiplied by loaded labor cost estimates the crew cost tied to the job.
2
Add field costs
Materials, equipment, subcontractors, overhead, and payment fees create the total job cost.
3
Compare against revenue
Revenue minus total cost gives gross profit, and profit divided by revenue gives margin.
Field example
Example: project that looked profitable
A roofing, plumbing, cleaning, or landscaping team can find whether extra labor, callbacks, or material changes quietly reduced the margin.
A job with strong revenue can still underperform if labor runs long or materials were not updated after a change.
Payment fees and small supplies should be visible because repeated misses add up across many jobs.
Job costing works best when estimates, work orders, time, materials, and invoices stay connected.
Common mistakes
What to double-check before using the result
Using wage instead of loaded labor cost
Payroll taxes, benefits, insurance, and burden can make real labor cost higher than hourly wage.
Skipping small costs
Fuel, disposal, supplies, equipment wear, and card fees can quietly shrink margin.
Reviewing too late
The best time to catch cost drift is while work is active, not months after the invoice is paid.
After the calculation
Turn the result into cleaner field work
Compare estimate to actuals
Identify whether the price, scope, materials, or labor plan caused the gap.
Update reusable pricing
Use the result to refine pricebook items, labor assumptions, and minimum charges.
Review similar jobs
Look for repeat patterns by trade, technician, customer type, or service area.
Related resources
Related templates
FAQ
Questions service teams ask about this tool
What is job costing?
Job costing is the process of comparing job revenue with the labor, materials, equipment, subcontractor, overhead, and fee costs tied to that job.
Is job costing the same as estimating?
No. Estimating predicts cost before work starts. Job costing compares planned or actual revenue against the costs tied to the job.
Why should contractors track job cost?
It helps reveal which jobs protect margin, which services need price changes, and where operations are leaking profit.