Mistake 4: Misallocating Equipment Costs
Equipment costs should reflect actual usage, not just ownership. According to industry research from Volvo Construction Equipment and Komatsu, construction equipment sits idle with an average of 28 to 38 percent of scheduled time. That idle time still carries costs, but how you allocate those costs to jobs matters.
The mistake happens when companies either fail to charge jobs for owned equipment at all( because " we already own it ") or charge inflated rates to active jobs to cover equipment that ' s sitting unused elsewhere. Both approaches distort project profitability.
The fix requires tracking actual equipment hours per job and calculating rates that reflect true costs, including maintenance, fuel, insurance, and appropriate depreciation allocation based on your accounting method. If you ' re using straight-line depreciation, work with your accounting team to ensure depreciation expense is allocated to jobs in a way that aligns with your overall financial reporting.
For rented equipment, make sure costs hit the correct project codes immediately, not two weeks later when someone finally processes the invoice.
Mistake 5: Failing to Update Costs as Projects Progress
Job costing isn ' t a set-it-and-forget-it exercise. Real-time tracking matters because construction projects are living, breathing things that rarely go exactly to plan.
Weather delays, change orders, site conditions, and supply chain disruptions all impact costs. If you ' re only reconciling actuals against estimates at project close, you ' ve lost your chance to make adjustments while there ' s still time to protect margins.
The Bottom Line
Accurate job costing isn ' t about knowing whether you made money after the fact but having the visibility to make informed decisions while projects are still active and building estimates for future work that actually reflect what things cost.
The construction companies that consistently maintain healthy margins aren ' t necessarily the ones winning the most bids. They ' re the ones who know their numbers and adjust quickly when reality diverges from the plan.
If you ' re struggling to pinpoint where profitability is slipping on your projects, it might be time to take a harder look at your job costing processes and the financial infrastructure supporting them.
Rea ' s construction and real estate team partners with contractors and construction companies to strengthen financial infrastructure across job costing and budgeting, cash flow forecasting tied to project timelines, equipment acquisition strategies, and project-specific financial analysis. We help clients build visibility and processes that support profitable growth.
Contact us to learn how our advisory services can help you improve project-level financial management.
Review job costs weekly or biweekly at a minimum. Compare budgeted versus actual spending across labor, materials, equipment, and subcontractors. When you spot variances early, you can adjust crew sizes, renegotiate supplier pricing, or have conversations with clients about scope changes before small problems become big losses.
Emerson Patrick, CPA
Manager emerson. patrick @ reaadvisory. com
614-923-8083
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