Contractors, installers and everyday retailers are driving some of the toughest general liability (GL) underwriting conditions in the US as routine operations trigger outsized third‑party losses, according to a new national study from USA Business Insurance Services.
According to the report, titled "Riskiest Trades to Insure in the U.S. for General Liability," many insureds still equate "hard to insure" with visibly dangerous work. The report, however, countered that from an insurer's perspective, the real problem classes are often those where normal day‑to‑day activity can quickly generate third‑party losses that spread into finished‑property damage, customer injury, product disputes and multi‑party litigation.
“The real pressure point in general liability is not simply danger to the worker,” the report noted. “It is how quickly normal operations can create a third-party loss that spreads into finished-property damage, public injury, completed-operations allegations, and legal expense.”
For GL underwriters, the most immediate implications are in construction and installation trades. The report highlighted roofing, welding and other hot work, fire sprinkler contracting, plumbing, electrical work, HVAC and appliance installation, and general contracting as major high‑pressure areas on the liability side.
These classes combine several of the most challenging GL triggers -- work on occupied or fully finished property, potential for uncontrolled water release, ignition sources and heat, complex subcontractor chains, and losses that may not fully emerge until months after completion.
In practice, that mix has led many carriers to maintain higher minimum premiums, stricter underwriting information requirements and tighter additional insured and subcontractor conditions for these trades.
Roofing is singled out as a persistent challenge because the most expensive part of many claims is not the roof itself, but the interior below it – drywall, insulation, inventory, electronics and tenant improvements. Welding and other hot‑work operations are problematic because a small spark or residual heat source can develop into a larger fire after crews leave a site. Fire sprinkler installation, despite its life‑safety purpose, can still produce severe water‑damage claims when testing, faulty fittings, valves or hidden leaks affect finished interiors.
The report stressed similar issues playing out in manufacturing and retail.
Manufacturers, distributors, importers and retailers can all be pulled into the same products claim if a case involves alleged design defects, manufacturing defects or inadequate warnings, the report said. That multi‑party dynamics complicates coverage analysis and can increase defense and indemnity costs across several policies.
In brick‑and‑mortar retail, the main GL concern remains premises liability. Drawing on The Hartford's small‑business claims analysis, the report noted that slip, fall and customer‑injury claims are among the most common, with average severity around $45,000. According to a Liberty Mutual's commentary, a single slip‑and‑fall or property‑damage event can escalate quickly in a market shaped by medical inflation and higher verdicts.
The study identified furniture and appliance stores, grocery and convenience operations, and home‑goods or showroom‑style retailers as subclasses likely to attract more GL scrutiny than owners expect. These businesses combine significant customer foot traffic with heavier, higher‑value stock and displays. For underwriters, that translates into closer review of floor conditions, housekeeping, merchandising, incident response and limits selection, and can support firm pricing or coverage restrictions where controls are weak.
The report also addressed what it describes as a persistent small‑business protection gap on GL.
While there is no single public dataset that cleanly measures insured versus uninsured rates for established businesses on GL alone, USA Business Insurance pointed to carrier‑backed indicators suggesting many small firms remain uninsured or materially under‑limited for their exposure.
That gap, the report said, often emerges when companies move into larger commercial contracts, begin using subcontractors, change product lines, or start working more regularly in finished, occupied environments without revisiting their liability limits or coverage structure.
The report is built on a 10‑year internal review of policy calculations, class placement patterns, underwriting friction points and real‑world claim triggers across all 50 states. It focused solely on GL exposures and explicitly excluded workers' compensation, commercial auto and professional liability.
