A subcontractor is an entity contracted by a general contractor (GC) to assist in the performance of component work of the project, such as electrical, mechanical, and trade work such as drywall, concrete, and three stages of work via a subcontract agreement (i.e. not directly contracted by the project owner). The majority of the physical work involved in a commercial project is performed by subcontractors and not the General Contractor’s direct workforce.
The relationship between GC and sub is contractually distinct from the GC’s own relationship with the owner, even though the sub’s work ultimately has to satisfy the owner’s requirements as expressed through the prime contract. That layering matters practically — a sub generally can’t claim a defence based on what the owner agreed to with the GC unless the subcontract explicitly flows that specific term down, which is why subcontract drafting pays close attention to which prime contract provisions actually apply to sub-tier work.
Subcontractor qualification, sometimes called prequalification, has become a more deliberate and formal process across the industry over recent years, with GCs increasingly reviewing a prospective sub’s financial stability, safety record, and past project performance before extending a bid invitation, rather than selecting purely on price once bids come in. This shift reflects a broader recognition that a sub’s reliability affects the GC’s own risk exposure considerably, beyond just the quality of that sub’s specific scope of work.
Having issues with subcontractor performance impacts more than the scope of that subcontractor. Subcontractors who fall behind, or even poor-quality subcontractors, cause delays to all the trades that interleave with their work. This is why GCs pay close attention to the performance of subcontractors on a project, well before final inspections.
First-tier subcontractors distinguish themselves from sub-subcontractors (i.e., second-tier subs). As you may have already guessed, first-tier subcontractors are hired by the GC, whereas sub-subcontractors are hired by first-tier subs. Payment and lien rights are different at each of these levels, and GCs must be vigilant at each level of subcontracting, not just the trades they hired directly.
Subcontractor default, a sub failing to perform, going out of business mid-project, or otherwise being unable to complete their contracted scope, is a real risk that most prime contracts and bonding arrangements specifically address, since it happens often enough across the industry to warrant deliberate contractual protection rather than simply hoping it never occurs on any given project.
