Resources
Insurance Glossary
Plain-English definitions of the terms you’ll see in policies, contracts, and certificates.
Contractor insurance terms, explained
Insurance policies, GC contracts, and certificates are full of jargon. This glossary explains the terms contractors actually encounter — in plain English, with links to deeper guides where it helps. Tap a letter to jump, or a term to expand its definition. Still unsure what something in your contract means? Ask a licensed specialist.
A · B · C · D · E · G · H · I · L · O · P · S · U · W
A
Additional Insured
A person or business (usually a GC or property owner) added to your policy so your coverage also protects them for liability arising from your work. Contracts routinely require it — see our general liability page.
Aggregate Limit
The maximum your policy will pay for all claims combined during the policy period. A $1M/$2M policy pays up to $1M per occurrence and $2M total per year.
B
Bond (vs. Insurance)
A bond guarantees your performance or honesty to a third party (like a license bond or performance bond); insurance protects you from losses. Many contractors need both.
C
Certificate of Insurance (COI)
The one-page proof-of-coverage document GCs, landlords, and clients ask for before you start work. Request yours here.
Class Code
The number that categorizes your work for workers’ comp rating. Misclassification is the most common reason contractors overpay.
Completed Operations
Coverage for claims arising from your finished work — critical in the trades, where a problem can surface months after the job. Included in general liability.
Commercial Auto
Coverage for business-owned vehicles. Personal auto policies exclude business use — see commercial auto.
D
Declarations Page
The summary page of your policy showing who’s insured, limits, deductibles, premium, and policy period. The first thing to check for accuracy.
Deductible
The amount you pay out of pocket on a covered claim before insurance pays the rest.
E
Endorsement
A written change to your policy that adds, removes, or modifies coverage — like adding an additional insured or a waiver of subrogation.
Errors & Omissions (E&O)
Another name for professional liability — covers financial losses from design errors, bad specs, or negligent advice.
Exclusion
Something your policy specifically does not cover. Knowing your exclusions (like pollution on standard GL) matters as much as knowing your coverages.
Experience Mod (EMR)
A multiplier applied to your workers’ comp premium based on your claims history versus similar businesses. Below 1.0 saves you money; above 1.0 costs you.
G
General Liability (GL)
The foundation of contractor insurance — covers third-party injury, property damage, and completed operations. Learn more.
H
Hired & Non-Owned Auto
Liability coverage when employees drive personal or rented vehicles for work — a gap most contractors don’t know they have. Part of commercial auto.
I
Inland Marine
Despite the name, nothing to do with water — it covers your tools and equipment wherever they go: jobsite, truck, storage, and in transit. Learn more.
L
Limits of Liability
The maximum your insurer pays — usually shown as per-occurrence / aggregate, like $1M/$2M.
Loss Runs
Your official claims history report from your insurer. Carriers request loss runs when quoting your business — usually for the past 3–5 years.
O
Occurrence
An accident or event that triggers coverage. Occurrence-based policies (standard for contractors) cover incidents that happen during the policy period, even if the claim is filed later.
P
Pollution Liability
Covers spills, runoff, and contamination claims that standard policies exclude. Essential for excavation and increasingly required on public work. Learn more.
Premium Audit
The insurer’s year-end review of your actual payroll and revenue versus estimates. Accurate estimates up front prevent surprise audit bills.
S
Subrogation
Your insurer’s right to recover claim costs from whoever was actually at fault.
Waiver of Subrogation
An endorsement giving up that recovery right against a specific party — a standard GC contract requirement.
U
Umbrella / Excess Liability
An extra layer of limits above your GL, auto, and employer’s liability — how contractors meet $2M–$10M contract requirements. Learn more.
W
Workers’ Compensation
Covers employee medical costs and lost wages for work injuries; required in most states once you have employees. Learn more.
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