E&O Insurance: A Practical Guide for Ontario Consultants and Professionals

What Is E&O Insurance?

Errors and omissions (E&O) insurance — also called professional liability insurance — covers your legal liability when a client alleges that your professional services, advice, or failure to act caused them a financial loss. Unlike general liability insurance (which covers bodily injury and property damage), E&O is specifically designed for the financial harm that flows from professional mistakes.

The claim doesn't have to involve an actual error. A client who believes you gave incorrect advice, missed a deadline, or failed to deliver on a service commitment can bring a claim against you. Defending that claim costs money regardless of whether you were at fault — and that defence cost is exactly what E&O covers.

Who Needs It in Ontario?

Any professional who provides advice, designs, analysis, or services for a fee should have E&O coverage. In practice, this includes:

• Management and IT consultants
• Engineers and architects
• Accountants, bookkeepers, and financial advisors
• Real estate agents and appraisers
• Marketing agencies and PR firms
• HR consultants and recruiters
• Entertainment and media professionals (production companies, talent agencies)
• Not-for-profit directors and officers (D&O — a related form of professional liability)

Some professions require E&O as a condition of their regulatory licence (engineers, lawyers, real estate agents in Ontario). For others, it's not legally mandatory — but increasingly required by clients and procurement processes. If you work with corporate clients, municipalities, or government bodies, E&O coverage is often specified in contract terms.

Understanding Claims-Made Policy Mechanics

This is where most professionals run into trouble. Unlike most business insurance (which covers events that occur during the policy period), E&O operates on a claims-made basis. Coverage applies to claims made against you while the policy is active — not necessarily when the alleged error occurred.

Two concepts are critical:

• Retroactive date — the "look-back" date of the policy. Claims arising from work done before this date are not covered, even if the policy is currently active. When you purchase a new E&O policy, the retroactive date should ideally go back to the start of your professional practice to provide full prior acts coverage.
• Extended Reporting Period (tail coverage) — if you cancel or let your E&O policy lapse, you lose coverage for claims that arise after cancellation — even for work done while the policy was active. Tail coverage extends the reporting window after a policy ends. This matters enormously when retiring, switching firms, or winding down a practice.

The practical implication: you cannot simply stop your E&O coverage when a project ends and assume you're done. A client who discovers an issue with your work two years later can bring a claim long after the engagement closed. Your coverage needs to be in place at the time the claim is made, not just when the work was done.

Limits, Deductibles, and What to Buy

E&O limits are typically expressed as per-claim and aggregate (e.g., $1 million per claim / $2 million aggregate). The right limit depends on the financial exposure of your work. A consultant working on a $50,000 project has different risk than one advising on a $5 million capital deployment.

Deductibles on E&O policies are often structured as duty-to-defend (the insurer defends from dollar one, and the deductible applies to settlement) versus non-duty-to-defend (you fund the defence up to the deductible). This distinction is significant — legal defence costs on a contested professional liability claim can easily reach $50,000-$100,000 before settlement.

At McCAM, our professionals specialists work with Ontario consultants and service firms to find E&O programs that match their risk profile and contractual requirements — not just the cheapest policy available. The wrong E&O coverage can leave gaps that only become visible when a claim lands.