General Liability Insurance for Contractors: What It Covers and What It Doesn't [2026]

A plumber installs a supply line fitting on a Friday, signs off, and heads home. Two weeks later the fitting fails, flooding the homeowner's kitchen, hardwood floors, and basement ceiling: $38,000 in water damage. General liability insurance for contractors covered the property damage to the home but did not cover the cost of fixing the plumbing. That distinction between what GL pays for and what it leaves on the contractor's plate is what this contractor insurance guide breaks down.

What does general liability insurance cover for contractors?

Contractor general liability insurance covers three categories: third-party bodily injury (a client trips over your equipment), property damage to someone else's existing property (you crack a tile during a bathroom remodel), and personal or advertising injury. It also includes legal defense costs paid outside your policy limits and no-fault medical payments up to $5,000 to $10,000 per person.

Coverage A: bodily injury and property damage

Coverage A handles the claims contractors file most often. A homeowner steps on a nail your crew left behind, a backhoe operator catches a gas line, or a ladder slides off a wall and dents the client's car in the driveway. All of these fall under Coverage A, which responds to bodily injury or property damage caused by your operations, per the Insurance Information Institute.

Coverage B and C: the parts most contractors forget

Coverage B handles personal and advertising injury, including claims like slander or copyright infringement in your marketing materials. Coverage C is simpler. It pays no-fault medical bills, usually $5,000 to $10,000 per person, for minor jobsite injuries regardless of who caused them, which means a client who bumps their head on scaffolding and needs stitches gets the bill covered without a lawsuit, a fault investigation, or a broken relationship. Most contractors forget both of these exist until they need them.

Duty to defend: defense costs outside limits

CGL (commercial general liability) policies have a feature contractors usually discover the hard way: the duty to defend. A $50,000 defense bill doesn't reduce your $1 million of available coverage because legal defense costs are paid on top of your limits, not out of them. (Most contractors undervalue this until they get named in a suit.) Completed operations coverage extends this protection to work you finished and left behind, like the plumber's supply line from the opening of this article.

What general liability insurance does not cover for contractors

Contractor GL does not cover your own injuries on the jobsite (workers compensation handles that), theft or damage to your tools and equipment (inland marine insurance), damage to the structure you're building (builders risk insurance), the cost of redoing faulty workmanship, professional design errors, pollution incidents, or vehicle accidents. Each gap requires its own policy.

The gap that catches most contractors off guard is the line between GL and workers comp. GL covers third parties who are not your employees, including clients, bystanders, and other trades on the jobsite. Your own crew's injuries fall under workers compensation, and there is zero overlap between the two policies. According to OSHA, over 5,000 workers sustain fatal injuries on the job each year, with fall protection violations leading the list of safety citations. All of those injuries to your own crew are workers comp, not GL.

Equipment theft is another frequent surprise. Multiple industry tracking reports estimate annual construction equipment theft between $300 million and $1 billion in the United States, with recovery rates below 25%. GL won't cover a stolen generator, saw, or trailer. That exposure sits under an inland marine policy, sometimes called a contractor's equipment floater.

What is the 'your work' exclusion in contractor GL insurance?

A roofing contractor's installation leaks six months later and ruins the homeowner's furniture and hardwood floors. The contractor's GL policy covers the furniture and floors. Tearing off and replacing the roof comes out of the contractor's pocket. That split, spelled out in ISO CGL form exclusions j(5), j(6), and l, is called the "your work" exclusion, and it is the single most common claim surprise in general contractor insurance.

Think of it this way: construction general liability insurance protects other people from the consequences of your mistake. It doesn't guarantee the quality of your work. The cost of fixing the actual defect is treated as a normal business expense, not an insurable loss.

Same pattern across trades. Set a shower pan wrong and water seeps through the subfloor into the kitchen ceiling below? GL covers the ceiling. The shower pan replacement is on the installer. That policy reads fine right up until claim day, and then the exclusion schedule is the only page that matters.

The subcontractor exception that matters for GCs

Exclusion l in the standard CGL form contains a built-in exception for work performed by subcontractors. If the faulty work was done by a sub, the GC's GL policy may cover the resulting damage to the GC's broader project. A general contractor hires a plumbing sub whose work fails and floods three finished units. General liability insurance for a general contractor can respond to the water damage in this scenario because the defective work was done by a sub, not the GC's own crew.

(That requirement is exactly why GCs demand that every sub carry GL and name the GC as an additional insured, meaning the GC is covered under the sub's policy.) The sub's own policy still faces the "your work" exclusion for the cost of redoing the plumbing itself.

How much general liability insurance do contractors need?

Most commercial projects require contractors to carry at least $1 million per occurrence and $2 million aggregate in general liability coverage. Over 97% of construction customers choose this standard limit structure, per Insureon data. Larger projects may require $2 million to $5 million per occurrence, typically achieved by adding an umbrella policy on top of the base GL.

Per occurrence vs. aggregate explained

Per occurrence is the maximum your policy pays for any single claim. Aggregate is the total it pays across all claims during the policy period, typically one year. With $1M per occurrence / $2M aggregate, you have $1 million available per incident but only $2 million total for the year.

Two large claims could exhaust your annual coverage entirely. The Insurance Information Institute notes that claim severity, not frequency, is the primary driver of escalating losses in liability lines. That makes adequate per-occurrence limits more important than ever for contractors working on projects where a single incident can generate a six-figure claim.

Per-project vs. per-policy aggregate

Most guides skip this entirely. A standard GL policy sets one aggregate for the entire policy year, which means a claim on one job eats into your coverage for every other active project. A per-project aggregate endorsement (sometimes called a "designated project" endorsement) gives each job its own separate aggregate limit.

For contractors running multiple jobs simultaneously, the per-project endorsement is worth every dollar. Real-world pricing runs around $300 per year for a roofing contractor, based on Coverwatch's E&S carrier quotes.

Contractor general liability insurance cost by trade

A painter and a roofer can walk into the same broker's office on the same day with the same revenue and the same clean claims history, and the roofer will pay about five times more for the same $1M/$2M general liability policy. Contractor GL premiums range from about $500 per year for low-risk trades like painting to over $6,000 per year for roofing, driven almost entirely by trade classification and the injury and property damage patterns each trade generates.

Those ranges assume $1M/$2M limits, under $500,000 in annual revenue, and a clean claims history. Published averages from carriers confirm the ballpark: Insureon reports a construction business average of $82 per month at $1M/$2M limits, and The Hartford reports an average of $1,351 per year for contractors.

What drives the cost spread

Five factors drive the spread within any single trade. Revenue, claims history, headcount, geography, and the specific operations you actually perform. Why such a big range for painters? A painter who does only residential interiors and one who hangs from scaffolding on high-rise exteriors are in completely different risk universes despite sharing the same trade label.

File a single claim and your GL premium typically jumps 10% to 25% at renewal. That bump follows you for three to five years. The cost of contractor general liability insurance is not just the annual premium. It is the annual premium plus the renewal increases that follow any claim you file.

Flat-fee brokers like Coverwatch compare general liability quotes across 35+ carriers so the recommendation is based on coverage fit, not on which carrier pays the highest commission. For a deeper look at the full cost of contractor insurance beyond GL, that guide breaks down workers comp, commercial auto, and umbrella by program.