Central Insurance Blog

Every contractor knows the story: A jobsite dispute arises, accusations fly back and forth, and someone files a claim for injuries, property damage, or construction defects years after project completion. And, suddenly, the general contractor is left liable for work they outsourced due to a poorly written or non-existent subcontractor agreement.

A solid contract with your subcontractor is crucial for a successful experience.

“A subcontractor agreement isn’t just about risk management—it outlines who does what, how and when a subcontractor will be paid, and what happens if something goes wrong,” says Kelly Booth, construction underwriting specialist at Central Insurance. “From an insurance standpoint, a subcontractor agreement also allows contractors to push down liability and gain access to your subcontractor’s coverage when needed.”

In this article, Booth shares what a strong subcontractor agreement should cover, how wording can affect your insurance coverage, and why one wrong clause can turn a simple misstep into a costly problem.

Why Having a Solid Subcontractor Agreement Matters

Subcontractor agreements do more than define scope and payment terms; they’re critical to a contractor’s risk management strategy. The general contractor is ultimately responsible if your subcontractor causes damage or fails to complete work to spec. Without a written agreement, you can be left open to claims without recourse to transfer or share the risk with the party at fault.

“Many insurance policies only cover what’s documented in a written contract,” Booth explains. “Verbal agreements are the Wild West. If it’s not in writing, it doesn’t exist in the eyes of your insurance policy.”

She also stresses that, although they were once common, verbal agreements are a legal recipe for disaster.

“A handshake doesn’t hold up in court,” she cautions. “If it’s not in writing, it doesn’t exist in your policy. Most carriers only provide coverage if the policyholder’s obligations are spelled out in a written contract.”

A Closer Look at the Impact of a Written Subcontractor Agreement

While working in insurance, Booth saw contractors protected because their contracts worked as intended, and handshake deals burned others.

“When it works, you’ll see claims fully defended and paid by the subcontractor’s insurance,” she says. “When it doesn’t, you end up in court trying to explain a verbal agreement, potentially risking your business or personal assets. It’s not worth the risk.”

Five Essentials Every Subcontractor Agreement Should Include

To avoid these pitfalls, Booth recommends general contractors work with an attorney to review their subcontractor agreement documentation every 12 to 24 months. Case law, local regulations, and statutes of repose change, so what comprises a strong agreement today might not hold up in court tomorrow.

In addition to constant review and modification, Booth identifies five essential factors every subcontractor agreement should include:

Reasonable Insurance Requirements

Your subcontractor agreement should set coverage minimums that match the subcontractor’s risk. 

“We want subs to carry limits that reflect their work,” Booth says. “For example, you can’t expect a two-person landscape crew to carry a $10 million umbrella policy.”

Keep in Mind: It’s also important to avoid being unreasonable when setting minimums, as this practice can easily backfire. In some states, courts have voided contracts entirely for exceeding permissible limits.

Clear Carrier Standards

Subcontractors should carry occurrence form policies from insurance carriers, like Central, with an AM Best A- rating or better. These carriers use standardized policy forms and state guaranty funds back them, giving you recourse even if the subcontractor’s insurer becomes insolvent.

“If your subcontractor goes bankrupt in year three of a project and you discover a defect in year four, you need to know that policy is still collectible,” Booth says.

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Mandatory Additional Insured Language

Include language requiring the general contractor be listed as an additional insured on a primary and non-contributory basis. It’s also important to consider a waiver of subrogation, a 30-day notice of cancellation, and proof of completed operations coverage extending through the statute of repose in your state. 

Statutes of Repose 

Statutes of repose impact how long completed operations coverage needs to stay in place, and vary widely by state and building type. In some jurisdictions, residential projects require longer liability windows than commercial ones. Coverage needs to stay in place, Booth advises.

“If a defect is discovered four years later, and the sub doesn’t have coverage, you’re back on the hook,” Booth cautions. 

Clear Restrictions on Sub-Subcontracting 

Booth recommends explicitly prohibiting or tightly controlling sub-subcontracting within your agreement. 

Risky Language, Red Flags, and Costly Mistakes

Contractual language matters. Booth notes that overly aggressive or non-compliant contract language can invalidate an agreement, especially if it conflicts with local law. 

“We’ve seen contracts thrown out because they demanded something not legally enforceable in that jurisdiction,” she says.

For Example: Requiring a sub to carry coverage beyond the allowable scope can void the agreement. If that happens, courts may place full responsibility and liability on the general contractor.

To avoid costly mistakes, Booth advises general contractors to pause when they spot the following red flags in agreement discussions with subcontractors:

• Hesitancy to provide full policy documentation
• Unwillingness to let an attorney review contract terms
• Lack of documentation on prior job performance or safety record
• Spotty Workers’ Compensation history
• Overreliance on unknown third-party subs

A Deeper Analysis of Liability

Even if a contract is sound, it’s important you don’t assume a Certificate of Insurance (COI) outlines a subcontractor’s full history. A COI is simply a summary of policy types, limits, and effective dates—information that can be useful, but not infallible. To combat this, states like Georgia have even implemented regulations requiring policy forms be attached to the COI due to misuse and fraud.

The Central Difference

Subcontractor agreements aren’t just about legal language; they’re one of the strongest tools to protect your business on and off the jobsite. Central’s specialized construction team partners with you from the start, helping identify and address contract gaps, strengthen safety and documentation practices, and align your coverage, preparing you for the unexpected.

Did You Know: Central is proud to have an AM Best rating of “A” Excellent.

If you ever need to make a claim, a claims team known for responsiveness, expertise, and clear communication will back you. With decades of experience in complex construction losses, they know how to navigate disputes, keep projects moving, and help you recover faster.

Talk to an agent to explore your coverage needs and to learn more about how Central can better protect your business.