The Busy-But-Broke Problem
You're closing deals. Crews are working. Revenue is growing. But somehow, your margins keep shrinking and there's never enough cash at the end of the month.
The problem isn't your sales team or your pricing. At least, not directly. It's that you don't know the true cost of each job until it's too late. You're flying blind on profitability.
Without job-level costing, you can't tell the difference between a job that made you $8,000 and one that lost you $2,000. They both look like revenue. But one is building your business and the other is quietly destroying it.
Job costing fixes this. It gives you a clear, per-job view of where every dollar goes, so you can stop subsidizing bad work with good.
What Job Costing Actually Means
Job costing means tracking every dollar of cost, including labor, materials, equipment, and subcontractors, against each individual job. Not in aggregate. Not by department. Per job. This is how you find out which jobs make money and which ones don't.
The Three Biggest Cost Leaks
Labor Overruns
Crews consistently take longer than estimated, but estimates never get updated. Your estimator quotes 8 hours and the crew takes 12. That's 50% more labor cost than you priced. And it happens on job after job.
Material Waste
Over-ordering materials, not tracking returns, and letting leftover stock sit in a truck bed or dumpster. Without a material reconciliation process, you're bleeding money on every job without realizing it.
Unbilled Change Orders
Extra work done on-site because the customer asked, the scope was unclear, or the crew wanted to 'do the right thing.' Nobody logged it. Nobody billed it. These three leaks alone can eat 10 to 15% of your margin.
Installing a Job Costing System
Start with your last 10 completed jobs. Compare estimated vs. actual costs for labor, materials, and subs. Look for patterns. Which job types consistently overrun? Which estimators are most accurate? Use this data to recalibrate your pricing.
Making It Stick
Job costing only works if it's done on every job, not just the big ones. Build it into your project management workflow. Require field teams to log hours and materials daily. Review job profitability within one week of completion.
How to Implement
Pull Your Last 10 Completed Jobs
Gather the estimates and actual costs (labor hours, materials, subs) for your 10 most recent completed jobs.
Compare Estimated vs. Actual
For each job, calculate the variance between what you quoted and what you spent. Look for patterns. Which job types overrun?
Identify Your Top Leak
Is it labor hours, material costs, or unbilled extras? Rank the leaks by dollar impact across all 10 jobs.
Implement Daily Field Logging
Require crews to log hours and materials at the end of every day. No exceptions. This is the data that makes job costing work.
Review Job Profitability Within 7 Days of Completion
Close out every job financially within one week. Compare actual margin to estimated margin and feed learnings back to your estimating team.
THE CASE: The Roofing Contractor Losing $3K Per Job
A $5.1M roofing company completing 400+ jobs per year. The owner was confident in his pricing. He'd been in the business for 15 years and 'knew his numbers.'
When we ran a job costing audit on his last 20 completed jobs, 7 of them had negative margins. Labor overruns averaged 35% on insurance restoration work, and unbilled extras were happening on nearly every job.
We implemented daily time tracking, material reconciliation on every job, and a mandatory change order approval process. Estimators recalibrated labor hours using actual data instead of gut feel.
Within 90 days, average job margin increased from 28% to 41%. The 7 unprofitable job types were either repriced or dropped entirely, freeing up crew capacity for higher-margin work.
Key Takeaways
- Track costs per job, not in aggregate
- The three biggest leaks: labor overruns, material waste, unbilled change orders
- Audit your last 10 jobs to find patterns
- Require daily field logging of hours and materials