Published by ALKEME Insurance Services · Licensed Insurance BrokerageLast updated April 2026
Commercial construction site

Protect your projects and margins from the financial impact of subcontractor non-performance, abandonment, and default with SDI coverage.

Coverage

Subcontractor Default Insurance for General Contractors

Licensed Brokerage20+ Years ExperienceUpdated April 2026

Subcontractor default is one of the most significant financial risks facing general contractors. When a subcontractor abandons a project, fails to perform according to contract specifications, or becomes insolvent mid-project, the general contractor bears the cost of completing the subcontractor scope, often at a premium due to the urgency of finding a replacement and the inefficiency of another firm finishing partially completed work. Subcontractor Default Insurance transfers this financial exposure to an insurer, covering the additional costs the general contractor incurs to complete a defaulting subcontractor scope of work. Unlike subcontractor bonds, which are procured by the subcontractor and protect the GC as a third-party beneficiary, SDI is purchased directly by the general contractor and provides coverage the GC controls. ALKEME helps large and mid-size general contractors evaluate whether SDI is appropriate for their project delivery model and places programs with the specialized carriers that offer this coverage.

How Subcontractor Default Insurance Works

SDI policies reimburse the general contractor for additional costs incurred when a subcontractor defaults on its contractual obligations. Covered costs typically include the difference between the original subcontract price and the cost to complete the defaulting sub scope using a replacement subcontractor, additional general conditions costs resulting from project delays caused by the default, acceleration costs to recover lost schedule time, and legal expenses associated with pursuing recovery from the defaulting subcontractor. The GC is responsible for a self-insured retention on each default event, which functions similarly to a deductible. SDI policies are typically written on an annual basis with aggregate limits that cover all projects started during the policy period.

SDI vs. Subcontractor Surety Bonds

Both SDI and subcontractor performance bonds protect the general contractor from subcontractor default, but they differ in important ways. Subcontractor bonds are procured and paid for by the subcontractor, with the surety investigating and controlling the claim process. The GC is the obligee but does not control the bond or the claim timeline. SDI is purchased by the GC, giving the GC control over the claim process and the ability to take immediate action when a sub defaults without waiting for a surety investigation. SDI also provides coverage for subcontractors who cannot obtain bonds due to financial limitations, which is common among smaller specialty trades. The trade-off is that SDI requires the GC to implement a rigorous subcontractor prequalification program and assume a self-insured retention on each claim.

Subcontractor Prequalification Requirements

SDI carriers require general contractors to implement comprehensive subcontractor prequalification programs as a condition of coverage. These programs evaluate each subcontractor financial strength, bonding capacity, safety record, project experience, and references before awarding a subcontract. The GC must rate each sub on a standardized scale and only award work to subcontractors that meet minimum prequalification thresholds. ALKEME helps clients design prequalification systems that satisfy carrier requirements while remaining practical to administer across a large subcontractor base. The prequalification discipline that SDI demands often becomes one of the most valuable aspects of the program because it systematically reduces the probability of subcontractor failure.

Is SDI Right for Your Construction Firm

Subcontractor Default Insurance is most effective for general contractors with annual revenue above fifty million dollars who self-perform a limited portion of project work and depend heavily on subcontractors across multiple trades. The program requires a commitment to formal subcontractor prequalification and the financial capacity to absorb the self-insured retention on default events. For firms that meet these criteria, SDI provides a more efficient risk transfer mechanism than requiring individual subcontractor bonds on every trade package, particularly for smaller subcontracts where bond procurement creates delays and costs that the sub passes back to the GC through higher bid prices. ALKEME evaluates each client subcontractor risk profile, project volume, and risk tolerance to determine whether SDI provides a net benefit compared to traditional bonding approaches.

Frequently Asked Questions

SDI programs are generally designed for general contractors with annual revenue of fifty million dollars or more who manage a large number of subcontractor relationships across multiple projects. The program requires dedicated resources for subcontractor prequalification and claims administration that smaller firms may not have. However, some mid-size GCs with annual revenue in the twenty-five to fifty million dollar range have implemented SDI programs successfully, particularly if their business model relies heavily on subcontracted work. ALKEME evaluates each firm individual circumstances to determine if the program is a good fit.

SDI premiums are typically calculated as a percentage of annual subcontract values, generally ranging from one-half of one percent to one and a half percent depending on the contractor prequalification practices, claims history, project types, and geographic concentration. Self-insured retentions typically range from two hundred fifty thousand to five hundred thousand dollars per default event, with higher retentions available for lower premiums. When compared to the cost of requiring subcontractor bonds across all trade packages, SDI often provides a lower total cost of risk, particularly when the indirect cost savings from eliminating bond procurement delays are considered.

SDI can replace the requirement for individual subcontractor performance and payment bonds on most trade packages, but there are exceptions. Some project owners and public agencies require subcontractor bonds by contract or by statute, in which case those bonds must still be obtained regardless of the GC SDI coverage. Additionally, GCs may choose to require bonds on exceptionally large subcontracts or from subcontractors who receive marginal prequalification ratings, using bonds as a supplemental risk transfer tool within the SDI framework. ALKEME helps clients develop a hybrid approach that uses SDI as the primary risk transfer mechanism with targeted bonding for elevated-risk subcontracts.

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