How do I know if a construction job is profitable before it is finished? Most tools tell you after it’s over. Here’s how to see which jobs are making money while they’re still running.

John walked into an HVAC sub running $2.8 million a year. Twelve active jobs on the board. Three felt like they were going well. Two felt behind. The other seven — no one could say.

The owner knew what every job was billed at. He knew what every job was contracted for. What he didn’t know was what each job was actually costing him in real time, with labor calculated at its true loaded rate. He found out at month-end, or sometimes at closeout. By then, the money was already gone.

One job came in at 8% profit instead of 19%. The $31,000 gap lived in the mechanical room rough-in — a task that ran at 2.2 times the estimated hours for three weeks before anyone noticed. If someone had caught it at the end of week three, the owner still had time to look at crew assignment, material staging, and whether a subcontractor was holding up a phase. He caught it at closeout instead. Nothing left to change.

That’s the actual problem. Not that contractors lose money on jobs — but that they find out too late to do anything about it.

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