When Sites Scale Up: How the Human Factor Drives Construction Casualty Costs
July 7, 2026
By Serena Branson and Joe Rozinski
The construction casualty insurance market is being reshaped by the rise of very large, complex projects. From multibillion dollar infrastructure programs to massive industrial facilities and dense mixed use developments, project size and complexity keep increasing.
A decade ago, megaprojects were relatively rare, accounting for only 3% of projects in 2013. Today, megaprojects now account for more than 25% of all nonresidential construction in the U.S. This trend brings not only technical and financial challenges, but also a sharp intensification of risks to workers, supervisors and subcontractors on site.
As projects scale, the human element becomes harder to manage and the stakes rise. A single serious injury or fatality can trigger multiparty litigation, intense public scrutiny, and large verdicts or settlements. A pattern of smaller incidents can erode project economics and strain relationships with insurers. Understanding how risks on the jobsite influence casualty exposure is essential for all parties involved.
As projects scale, the human element becomes harder to manage and the stakes rise.
The human side of risk on the jobsite
Workforces on mega projects are large and fluid, often numbering thousands at peak. They mix seasoned workers with many new or short‑term hires unfamiliar with complex hazards. High turnover and continual onboarding make it difficult to deliver consistent, high‑quality inductions and task‑specific training. Skill shortages can push less experienced people into roles requiring advanced judgment, increasing the chance of errors and unsafe practices.
The physical environment amplifies these risks. Congested sites with multiple trades operating simultaneously, constant movement of heavy machinery and equipment, and activities such as working at height, in excavations or within confined spaces, can all lead to increased exposure.
Effective coordination is critical; when planning or communication breaks down, one team can inadvertently create hazards for another. Congestion drives frequent minor incidents – slips, trips, falls, minor collisions – and occasional severe events such as crane failures, structural collapses or confined‑space accidents with multiple casualties.
Subcontractor and supply chain dynamics add further complexity. Large projects involve many firms, each with its own culture and procedures. Even where contracts clearly assign safety responsibilities, practical risks on site are shared. When a subcontractor’s worker is injured, disputes can arise over responsibility, indemnity and insurance response. Inconsistent training, language barriers and differing attitudes toward near‑miss reporting can mask emerging issues until a serious incident occurs.
Maintaining a strong safety culture is especially challenging on large-scale projects. When a mega project covers a vast area, involves multiple shifts, and includes numerous contractors, ensuring a consistent safety culture becomes more challenging. Supervisors may be stretched across too many workers or work fronts, and safety messages can weaken as they pass through layers of management. Tight deadlines and the threat of liquidated damage can create pressure to shortcut procedures.
Fatigue, stress and mental health are also rising concerns. Long hours, night shifts and rotating schedules, combined with sustained schedule pressure and job insecurity, drive chronic fatigue and distraction in environments involving height, heavy machinery and complex work. Insurers and risk engineers are placing greater emphasis on human factors in their post-incident analysis.
How the casualty market is reacting
People-related risks on jobsites are reshaping insurer appetite, pricing, and terms for primary and excess coverage. Carriers are becoming more selective about which large projects they insure and under what conditions.
Weaknesses in safety management, training, subcontractor control, or fatigue management often drive higher premiums, larger deductibles or retentions, and tighter coverage. Restrictions on work at height, crane operations, tunneling, deep excavations, or certain types of equipment are now common. Some insurers also require specific controls -- such as site induction, competency checks, or drug and alcohol testing -- as conditions of coverage.
Data and analytics now sit at the center of underwriting decisions. Insurers are looking beyond lagging indicators like lost-time injury rates. They expect detailed loss histories by project type and trade, evidence of robust root-cause analysis, and data on leading indicators such as safety observations, near-miss reports, permit-to-work compliance, and behavioral metrics. Projects that adopt digital tools - such as wearables, telematics, access controls connected to training records, digital permits, and mobile reporting - can leverage this data to show how they manage employees and third parties exposures on job sites.
Controlled insurance programs are increasingly common on large projects. Owner Controlled Insurance Programs (OCIPs) and Contractor Controlled Insurance Programs (CCIPs) bring many or all contractors under a single casualty program. When well designed, they enhance control by standardizing safety requirements, streamlining claims handling, and providing a single view of incident trends. However, if the site culture is disjointed, and oversight is lacking, these programs may heighten, rather than lower loss volatility.
Social inflation heightens these pressures. In many jurisdictions, courts and juries are awarding larger damages in bodily injury cases, often fueled by systemic shortcomings. Regarding worker accidents, these narratives often highlight human factors such as training and supervision, staffing shortages, fatigue, overlooked warnings and the pressure to meet production goals. This environment elevates the importance of excess and umbrella layers and sharpens insurer scrutiny of how human factors are managed on the jobsite.
Managing people risk as a core capability
People risk on large projects must be managed as a core strategic capability, not just a safety function. It helps to frame that capability around a few practical pillars that guide decisions from planning through execution:
- Integrate risk into design and planning: embed risk management from the outset with safer design, realistic schedules, sound workforce planning and clear contractual safety responsibilities.
- Lead with culture and accountability: ensure visible senior commitment, build safety into project decisions, empower supervisors to stop work and foster a just culture that encourages open reporting and learning.
- Manage and support the workforce: deliver structured onboarding for all workers, control competency for high-risk tasks, tailor training to language and literacy levels, and enforce fatigue and mental health support measures.
- Control subcontractor risk: prequalify based on safety performance and cultural fit, standardize expectations and inductions across all firms, and align contracts and incentives with safety outcomes.
- Use technology and data intelligently: leverage real time site information, digital permits and safety technologies, and analyze observation and near miss data to target interventions and verify effectiveness.
The road ahead
Construction projects are unlikely to become smaller or simpler. Infrastructure renewal, greater energy demands, and ongoing urbanization all point to more and larger complex undertakings.
As this continues, attention to the human side of risk on the jobsite will remain central to obtaining casualty coverage. Organizations that develop robust people risk management capabilities will be better equipped to secure capacity at favorable terms and endure the operational impacts of serious worker incidents.
Ultimately, managing people risk effectively is not just about controlling insurance costs. It is about ensuring that large, ambitious projects are delivered safely and sustainably, with the confidence of the workers whose effort and expertise make them possible.
About the authors
Serena Branson is an Underwriting Manager for AXA XL's Construction Excess Casualty and Joe Rozinski is an Underwriting Manager for Construction Primary Casualty.
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