Every contractor with a phone eventually gets the same email: "Please send a COI with $1M/$2M limits naming us as additional insured." Most people call their insurance agent, pay the premium, forward the certificate, and assume the problem is solved. A decade later, a claim comes in, and they find out the coverage they thought they had is not the coverage they actually had.
General liability is the most commonly required, most commonly mis-understood insurance product in construction. Here's what it actually does, what it doesn't, and how to read your policy so you're not learning these lessons inside a claim.
What GL Actually Covers
The Insurance Services Office (ISO) Commercial General Liability policy — CG 00 01, the template that most carriers start from — covers three main categories. Every contractor should be able to name all three.
Coverage A — Bodily Injury and Property Damage Liability
Pays damages you become legally obligated to pay because of bodily injury or property damage caused by your operations. This is the main event. Examples:
- A customer trips over your extension cord on a jobsite and breaks a wrist → medical bills and pain/suffering settlement
- Your ladder falls through a skylight, destroying inventory in the store below → replacement cost of damaged goods
- A subcontractor under you damages a neighbor's fence while backing equipment in → repair cost
Standard limit: $1,000,000 per occurrence.
Coverage B — Personal and Advertising Injury Liability
Covers non-physical torts: libel, slander, wrongful eviction, copyright infringement in your advertising. Rarely used by most contractors but not zero — a contractor who writes a scathing review of a supplier could trigger a defamation claim that Coverage B would handle.
Standard limit: $1,000,000 per occurrence.
Coverage C — Medical Payments
Pays for relatively small medical bills (typically $5,000–$10,000) incurred by third parties injured on or near your operations, regardless of fault. The idea is to make small injuries go away without a lawsuit.
A homeowner trips on your tarp and bangs their knee — $800 urgent-care bill. Med Pay writes the check, no fault analysis, no suit.
What GL Does Not Cover
This is where most contractors get hurt. GL is a liability policy for damage to other people and their property. It does not cover:
- Your own tools, equipment, or materials — you need inland marine / tools + equipment coverage
- Your own vehicles — you need commercial auto
- Your own employees' injuries — you need workers compensation
- Damage to the specific work product you're installing (i.e., the thing you're being paid to install, while you're installing it) — you need builders risk / installation floater
- Professional services / design errors — you need professional liability (aka E&O)
- Pollution incidents — standard policy excludes; you need contractor's pollution liability (CPL)
- Cyber breaches — standard policy excludes; you need cyber liability
A contractor with GL only is covered for damage to third parties. Anything else is a separate policy.
The Three Exclusions That Trip Contractors Up
1. The "Your Work" Exclusion
Exclusion (l) in the standard CGL excludes "property damage to your work arising out of it or any part of it." In plain language: if you do faulty work and the faulty work itself is damaged, GL won't pay to fix it. If the faulty work causes damage to other property, GL will cover the other property.
Example: You install a water line incorrectly. Six months later it bursts.
- Cost to redo the water line (your faulty work): not covered
- Cost to replace the hardwood floors the burst damaged (resulting damage): covered
This exclusion is modified in many policies by a "subcontractor exception" — if the faulty work was done by a subcontractor under you, your GL may actually cover the cost to redo it. Whether the subcontractor exception is in your policy matters enormously if you sub out work. Check the endorsement list.
2. The Earth Movement Exclusion
Excavators, landscapers, foundation contractors, demolition specialists, and directional drillers take note. Standard GL excludes damage caused by earth movement, including collapse caused by your excavation or the removal of supporting earth.
If you dig a foundation and the neighbor's garage settles and cracks, the standard exclusion applies — you are personally on the hook unless you bought a subsidence endorsement (sometimes called "collapse and subsidence" or "earth movement coverage").
Many small-business GL packages sold to one- or two-person shops just exclude it and never offer the endorsement. If you dig, insist on subsidence coverage or switch carriers.
3. The Professional Services Exclusion
If you provide design, engineering, architectural, or consulting services — even informally — GL excludes damages arising from that work. A contractor who redesigns a client's kitchen layout, advises on structural changes, or provides load calculations is providing professional services and needs professional liability (E&O).
This catches design-build contractors, remodelers who advise on structural decisions, and specialty contractors who make engineering recommendations. If there's a design component to what you sell, buy E&O.
Limits: What $1M/$2M Really Means
The two numbers in "$1M/$2M" are:
- Per-occurrence limit — the max payout for a single claim
- Annual aggregate — the max total payout across all claims in the policy year
A $1M/$2M policy with a covered claim of $1.5M will pay $1M and you'll be personally liable for the $500K excess. A $1M/$2M policy that has already paid out $1.5M in prior claims during the year has only $500K aggregate remaining for any new claim.
Commercial clients and property managers typically require at least $1M/$2M. GCs on larger projects often require $2M/$4M and may require an umbrella/excess policy on top of that to reach $5M or $10M. Public work can require $5M/$10M or more.
Buying Smart in 2026
Class Code Matters More Than Carrier
Your insurance is priced by ISO class code — a four-digit code describing what you do. A painter (class 91585) and a roofer (class 91580) with identical revenue can pay 3x different premiums because roofing is a higher-loss class.
Make sure your policy describes what you actually do, not just what sounds close. A "handyman" class code issued to someone who actually frames houses can result in claims being denied for misrepresentation. Be accurate on the application.
Request the Declarations Page and Endorsement List, Not Just the COI
A COI shows the summary. The declarations page shows the actual limits, deductible, named insureds, and (critically) the list of endorsements. Endorsements modify coverage — adding exclusions, adding additional insureds, modifying the "your work" exclusion, or (commonly on cheap small-business policies) adding onerous exclusions like "residential work excluded" or "height over 3 stories excluded."
Ask your agent for the dec page and the endorsement schedule when the policy is issued. Read them. If anything is excluded that you actually do, you have a coverage gap.
Additional Insured Endorsements — CG 20 10 vs CG 20 37
When a client asks to be named additional insured, you need more than a COI line. You need an actual endorsement form attached to your policy. The two most common:
- CG 20 10 — additional insured for ongoing operations only
- CG 20 37 — additional insured for products-completed operations (covers claims arising from your completed work)
Many clients require both. Some agents provide a CG 20 10 and call it done. If the contract or GC requires completed ops additional insured and you only have ongoing ops endorsement, you have a gap in compliance with your contract.
Occurrence vs. Claims-Made
Most contractor GL is occurrence-based — a claim is covered based on when the underlying event happened, regardless of when the claim is made. If an event happens in 2026 and the claim isn't filed until 2031, the 2026 policy responds.
A few policies (usually professional liability, some specialty GL) are claims-made — the policy in effect when the claim is reported has to cover it. Claims-made policies are cheaper upfront but leave you exposed if you cancel or switch carriers without buying tail coverage.
If you can, stay on occurrence-form GL. Simpler and safer long-term.
2026 Pricing Benchmarks
Rough 2026 annual premium ranges for $1M/$2M GL on small-contractor operations:
| Trade | Low | Typical | High | |---|---|---|---| | Handyman, painting, flooring, light remodeling | $480 | $800 | $1,400 | | Drywall, finish carpentry, HVAC | $600 | $1,100 | $1,800 | | Plumbing, electrical (non-EV, residential) | $800 | $1,400 | $2,400 | | Framing, siding, concrete | $1,000 | $1,800 | $3,200 | | Roofing | $1,800 | $3,500 | $7,500 | | Excavation, demolition, solar install | $1,600 | $3,000 | $6,500 |
Add approximately 20%–40% for workers compensation in most states, another 15%–25% for commercial auto if you have a vehicle, and another $300–$900 for tools + equipment coverage.
The Claims Reality
When a claim hits, the ideal flow is:
- You notify the carrier within the policy's required reporting window (typically "as soon as practicable" — treat that as within 48 hours)
- Carrier opens a claim file and assigns an adjuster
- If the claim alleges covered damages under the policy, carrier provides a legal defense (the "duty to defend" is separate from the duty to indemnify)
- Carrier investigates, negotiates, settles or litigates
- If settlement/judgment is within policy limits, carrier pays directly to claimant
Things that break this flow and leave you exposed:
- Late notice — carrier can deny coverage if late notice materially prejudices their investigation
- Failure to cooperate — not responding to adjuster requests, not appearing for depositions, admitting fault in writing without counsel
- Settling the claim yourself without carrier involvement — "voluntary payment" can void coverage
- Claim falls under an exclusion — carrier may deny the claim outright or issue a reservation-of-rights letter
Read the claim cooperation provisions of your policy once, ideally before you ever have a claim. Know the reporting deadline. Save your agent's emergency contact number.
The Short Version
Treat GL as catastrophe insurance for third-party bodily injury and property damage. Buy enough limit to cover the worst realistic scenario on your worst project. Verify the endorsement list matches what your contracts require. Don't confuse GL with tools coverage, commercial auto, workers comp, or E&O — each is a separate product, and the marginal cost of adding what you actually need is small compared to the cost of learning you didn't have it.
Shop every 2–3 years. Premiums creep, and carriers that were competitive for your class 5 years ago may not be today. Always get at least three quotes when you re-shop, and always read the dec page before binding. Your agent works for you — they should be able to walk you through every endorsement without sighing.