Professional Liability Insurance in Ontario

CPA Ontario requires:

• $1M per claim (Solo practitioners)
• $1.5M ($2 to 3 member firms)
• $2M+ (4+ members)

Professional engineers Ontario requires formal disclosure of insurance status; firms with a Certificate of Authorization must meet strict compliance protocols.

Ontario Association of Architects requires mandatory E&O coverage administered through Pro-Demnity Insurance Company.

Real Estate Council of Ontario requires mandatory provincial E&O group insurance program required for active registration.

Law Society of Ontario requires mandatory E&O policy minimums enforced through LawPRO.

Unlike automobile or standard property policies, professional liability insurance in Canada is written almost universally on a claims-made basis. Your policy must be active both when the work was performed and when the lawsuit is formally filed against you. If you cancel or let coverage lapse upon retirement or closing without securing tail coverage (Extended Reporting Period), you will have zero protection against claims filed today for past work.

In Canadian E&O policies, legal defence expenses, including attorney fees, expert witnesses, and court costs, are typically inside the policy limit. Every dollar spent defending your business directly reduces the remaining limit available to pay settlements.

• Baseline Defence Cost: Defending a complex professional error suit in Ontario typically costs $32,000 to $35,000 in legal fees, even if the case is groundless.
• Average Settlement: When liability is established, the average engineering E&O claim in Ontario exceeds $110,000.

An independent software consultant provides custom database architecture for an e-commerce firm. A coding oversight causes a critical server outage resulting in lost sales and cyber remediation. A tailored E&O policy covers the legal defence costs and final negotiated settlement.

A financial firm recommends an asset reallocation strategy. The client later alleges the advice violated their risk profile following market shifts. E&O insurance funds the legal defence and expert reviews needed to protect the practice.

An engineering firm plans stormwater drainage for a commercial build. A capacity calculation oversight during a major storm causes localized flooding and project delays. Professional liability covers rework and delay claims. (Read our full Ontario Engineering Insurance Guide for technical analysis).

Consultants, IT firms, real estate and financial services clients usually ask for errors and omissions (E&O) insurance, while engineers, architects and health practitioners say professional liability. In Ontario they describe the same policy, so a contract that asks for either one is met by the same coverage.

An E&O claim alleges that your advice, design, report or service caused a client a financial loss, such as a missed deadline, a calculation error or a recommendation that did not perform. The policy pays your defence and any settlement or judgment up to the limit. Bodily injury and property damage sit under commercial general liability instead.

Enterprise, bank and public-sector clients across Toronto and the GTA routinely require proof of E&O before a statement of work is signed. We place technology E&O for independent consultants and growing software firms, and we work with businesses across the city as an insurance broker in Toronto.

Planners and advisors are often required to carry E&O by their regulator, dealer or managing general agent, and fee-based planning work can fall outside a group program. We review what your existing E&O already includes before we quote.

GTA infrastructure, transit and development projects routinely set professional liability minimums in the consultant agreement. Rob Roughley, P.Eng., reviews scope and contract wording with our team before we approach markets.

Management consultants, designers and other advisory firms that want E&O, general liability and cyber arranged together can look at our professional services insurance program.

Many private service agreements in the GTA ask for $1M per claim, corporate and institutional contracts often ask for $2M, and larger public-sector, infrastructure and development work can require $5M or more. Your contracts and your regulator set the floor, so we read them first and match the limit to the strictest one.