ELECTRICAL CONTRACTOR IBEW VS OPEN SHOP OVERHEAD RATE — COST STRUCTURE DIFFERENCES.
IBEW electrical overhead rates are typically lower as a percentage of revenue than open shop because more cost sits in direct labor (CBA fringe rates) rather than in overhead. But the absolute direct labor cost per hour is higher. The estimating variable on IBEW work is hours, not rate — the rate is fixed by the CBA. On open shop, both rate and hours are variables. Both structures require accurate overhead rate calculation and classification-specific labor burden tracking in the estimate.
SPM builds IBEW-specific and open shop-specific cost code structures for electrical contractors and calculates separate overhead rates when hybrid operations require it.
WHAT CHANGES IN THE COST STRUCTURE WHEN YOU OPERATE UNION VS NON-UNION.
Union Fringe Benefits Are Larger and More Predictable
IBEW electrical contractors pay labor fringe benefits directly to union trust funds at rates set by the collective bargaining agreement: health and welfare, pension, annuity, apprenticeship, and JATC contributions. These fringe rates are predictable — they are in the CBA and they change at contract renewal — and they are larger than typical open shop benefit packages for comparable classifications. The fully burdened IBEW journeyman rate commonly runs $80–$110/hour in major markets, compared to $55–80/hour for open shop journeyman labor in the same market. The higher burden means the overhead rate percentage is lower — because more cost is direct labor rather than overhead — but the absolute dollar amount of direct labor cost per project is higher.
Union Dispatch Affects Project Startup Cost and Scheduling
IBEW electrical contractors dispatch crew through the union hall. When a project starts, the contractor calls for workers at the applicable classification level. The dispatch process is relatively standardized — known workers go to the specific contractor as permitted by the local’s rules. This workforce flexibility differs from open shop operations where the contractor carries a consistent employed crew. The cost implication: IBEW contractors do not carry the year-round burden of a permanent field workforce during slow periods. The workforce scales with project volume. Open shop contractors who carry a consistent crew have higher baseline overhead during periods of reduced project activity.
CBA Determines the Rate; Margin Is the Variable
On IBEW work, the labor rate is the CBA rate — there is no negotiation at the project level. The estimator knows the exact fully burdened cost per classification hour before the bid is built. The variable is not the rate — it is how many hours each classification will take. Open shop contractors have more flexibility in labor rate — market wages vary and benefit packages are not CBA-mandated — but face more variability in estimating accuracy because the rate depends on who is on the crew at the time of the project.
WHAT IBEW ELECTRICAL CONTRACTORS SHOULD INCLUDE IN OVERHEAD THAT OPEN SHOP CONTRACTORS ALSO CARRY — AND WHAT IS DIFFERENT.
The hybrid operation: Some electrical contractors operate IBEW on some project types (commercial high-rise, data center, industrial) and open shop on others (commercial low-rise, residential, light commercial). The overhead rate calculation for a hybrid contractor must model both labor structures and the blended overhead rate reflects the mix. SPM builds separate cost code structures for IBEW and open shop work in hybrid operations.
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