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Contractor insurance is not one single policy. It is usually a package of coverages that work together to protect your contracting business from common construction and trade-related losses. Most contractor insurance programs include some combination of commercial general liability, tools and equipment coverage, commercial auto, and workplace coverage considerations (such as WSIB in construction).
It matters because one uninsured claim can cost more than years of premiums. It also matters because many customers, general contractors, and project owners will not let you start work until you can provide proof of insurance.
The most common types of insurance for contractors in Ontario include:
General Liability (CGL) for third party bodily injury and property damage claims
Tools and equipment insurance to repair or replace stolen or damaged tools and equipment
Commercial auto insurance for business-owned vehicles and job-related driving risk
Project-specific insurance such as builder’s risk and wrap-up liability for certain jobs
Errors and omissions (E&O) for contractors who have design, specification, or professional exposure (depends on your scope of work)
Most people mean commercial general liability (CGL) when they say “contractor liability insurance.” CGL is designed to protect your business against third party claims for bodily injury or property damage arising from your operations.
In contractor terms, liability insurance can help when:
Contractors often choose limits based on what their contracts require. Many general contractors and commercial customers will specify minimum limits and may require additional insured wording.
For contractors doing construction work in Ontario, WSIB is a critical topic. WSIB’s expanded compulsory coverage means many business owners and operators in construction need WSIB coverage and registration, even if they do not have employees (with specific exceptions).
This impacts:
If you work as a principal hiring subcontractors, understanding WSIB clearance requirements matters too, because clearances are used to confirm WSIB coverage status in construction contracting chains.
If you use vehicles for business purposes, personal auto insurance often will not match the exposure. Commercial auto is commonly described as a key coverage for businesses using vehicles commercially, covering damage or loss of vehicles and liability for injuries or property damage caused by those vehicles.
Commercial auto becomes especially important when you have:
Your tools and equipment are often your livelihood. Tools and equipment coverage is commonly described as protecting the tools and equipment used for your work, including theft, damage, or loss at a job site or during transportation.
This type of insurance is especially valuable for trades where you carry high-value gear, or where theft risk is higher due to frequent site-to-site movement.
General liability is the foundation of most contractor insurance programs. It is also the coverage clients expect first. Many contractors lose work opportunities simply because they cannot provide a valid COI showing general liability coverage.
To make your general liability coverage more job-ready, you may need:
Even a one-person contractor can face a large liability claim. If you step onto a job site, your risk does not scale down just because your business is small. Contractor insurance is for any contractor doing work that could cause injury, property damage, or financial loss.
Cost depends on your trade, revenue, claims history, and coverage choices. Many discussions of contractor insurance costs highlight that premiums range widely, with smaller contractors paying much less than large general contractors on complex projects.
In many cases, the bigger risk is being underinsured or uninsured and having to pay legal defence and damages out of pocket.
Sometimes a project has wrap-up liability or other project insurance, but that does not automatically replace your own coverage. Northbridge notes that project insurance often includes two main coverages: builder’s risk and wrap-up liability, and these are project-focused solutions.
Even when a project policy exists, your business may still need:
The safest approach is to review the contract and the project policy wording before assuming you are covered.
Most contractors start with commercial general liability, and many also need tools and equipment coverage and commercial auto. Contractors in construction may also need WSIB registration and coverage under expanded compulsory coverage rules, depending on their situation.
There is no single law that forces every contractor to buy general liability insurance, but many clients and contracts require it. For construction industry workplace coverage, WSIB expanded compulsory coverage applies to many businesses in construction, including some owners and operators, with certain exceptions.
Premiums vary widely. Cost depends on trade, annual revenue, payroll, claims history, coverage limits, and the type of work you do. It is common for pricing to range significantly between a small independent contractor and a general contractor managing larger projects.
A certificate of insurance is proof that you have active insurance coverage. Clients often ask for a COI to confirm you carry liability coverage before you start work, because it helps protect them if an accident or damage occurs.
Often, yes. Wrap-up liability and builder’s risk are typically project-specific coverages, and they may not replace your business’s own general liability, tools coverage, auto insurance, or other needs. Always confirm what the project policy covers and what your contract requires.
WSIB’s operational policy outlines when principals and contractors in construction must obtain a clearance certificate and the requirements before it will be issued. In many construction contracting chains, clearances are used to confirm WSIB coverage status before work proceeds.
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