Construction Job Costing
Track labor, materials, and subcontractor costs by project so you know which jobs actually make money.
What This Is
Job costing means tracking every expense that goes into a project. Labor hours, material purchases, subcontractor invoices, equipment rental, permits. Everything gets coded to a specific job number so you can see exactly what that project cost you when it’s done.
Without job costing, your books show total revenue and total expenses for the month. That tells you whether the business made money overall. It doesn’t tell you that the commercial buildout made 22% margin while the residential addition lost 5%. Those details matter when you’re deciding what work to take on next.
The Tracking Process
The Tracking Process
Every receipt, invoice, and time entry gets assigned to the right job. Materials from the supply house are coded when they come in. Labor hours are allocated based on where crews worked. Subcontractor payments are matched to the projects they worked on. Nothing slips through unassigned.
The Reporting
The Reporting
Job profitability reports show revenue, actual costs, and margin for each project. Work-in-progress reports track costs on jobs that aren’t finished yet. Completed job summaries compare what you estimated to what actually happened. You see patterns over time that help you bid better.
Why This Matters
You finish a job and deposit a check for $45,000. It feels like a win. But you haven’t added up the extra week of labor when the framing took longer than expected. Or the materials reorder when measurements were off. Or the sub who charged more than the original quote. That $45,000 job might have cost you $44,000 to complete. Without tracking costs by project, you won’t know until it’s too late to fix.
The bigger problem is what happens next. You bid a similar job using the same estimates because you thought the last one was profitable. You take on more of that same work, thinking you’re building the business. A year later, cash is tight and you’re not sure why. The answer was buried in job cost data you never captured.
Estimates Based on Hope
Estimates Based on Hope
Without historical cost data, every bid is a guess. You estimate labor hours based on how long you think it should take, not how long similar jobs actually took. You price materials based on supplier quotes, not the waste and extras that always happen. Your margins exist on paper but not in your bank account.
Losses That Stay Hidden
Losses That Stay Hidden
That bathroom remodel felt profitable when you finished it. But the sub invoice came in two weeks later and nobody connected it to that job. The extra materials run got charged to overhead. By the time all the costs are in, you’ve already moved on mentally and the real numbers never get calculated.
What Changes
You start seeing which types of work actually make money. Maybe your new construction jobs consistently hit margins while your renovation work runs over budget because of unknowns behind the walls. Maybe certain clients are profitable and others nickel-and-dime you with change orders that don’t cover your costs. The data shows you what your gut can only guess at.
Your estimates get better because they’re based on real numbers from similar past jobs. You know what a kitchen remodel actually costs in labor hours, not what you hoped it would cost. You know which subcontractors stay on budget and which ones always run over. Your bids reflect what happens on real job sites, not best-case scenarios.
Smarter Bidding
Smarter Bidding
Bidding on a commercial tenant buildout? You can pull data from the last three you completed. You know actual labor hours, material costs, and where things went over. Your new estimate accounts for reality instead of optimism. You stop underbidding jobs that always cost more than expected.
Better Business Decisions
Better Business Decisions
Which job types should you pursue more aggressively? Which ones should you price higher or stop taking? Are your subs giving you good value or eating into your margins? Job costing answers these questions with numbers. You make decisions based on what the data shows, not what you assume.
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