Glossary
Duty to Defend
By LiabilityGap EditorialUpdated 2 min read
The short answer
The duty to defend is your insurer's obligation to appoint and pay lawyers to defend you against a lawsuit whenever the claim, as pleaded, could possibly fall within the policy's coverage. It's triggered by the allegations, not by whether you're actually found liable, and it generally continues until the insurer has paid out its full policy limit.
The duty to defend is your insurer's obligation to appoint and pay lawyers to defend you against a lawsuit whenever the claim, as pleaded, could fall within the policy's coverage. The trigger is the allegation, not the outcome: Canadian courts assess the duty by reading the statement of claim against the policy wording, and the mere possibility of coverage is enough. That makes the duty to defend broader than the duty to indemnify (the duty to actually pay a judgment) — an insurer can end up funding a full defence for a claim it never has to pay.
On Canadian personal policies, defence costs are commonly paid in addition to your liability limit, not subtracted from it — a meaningful feature, since defending a serious injury claim can run well into six figures. But the duty has an end point: once the insurer pays out its full limit in settlement or judgment, its obligation to keep funding your defence generally stops.
Why it matters to you#
Two reasons. First, the duty to defend is the most-used benefit in liability insurance — most people are far more likely to need lawyers than to face a seven-figure judgment, and groundless or inflated claims still cost real money to make go away. Second, the end point is where underinsured Canadians get hurt: if a claim is worth more than your $1 million limit, your insurer can pay its limit and step away mid-fight, leaving you to fund your own defence against the remainder. Umbrella and excess liability policies commonly take over the defence at exactly that point — one of their least advertised and most valuable features.
In practice#
- A guest sues you for $2 million over a fall you're sure was their own fault. Your insurer must still defend, because the allegations could fall within coverage.
- If the claim clearly falls outside the policy — an intentional act, an excluded activity — there is generally no duty to defend at all.
- Limit exhausted, lawsuit ongoing: without an umbrella layer, every legal bill from that day forward is yours.
Frequently asked questions
What is the duty to defend?
The duty to defend is an insurer's obligation to appoint and pay lawyers to defend you against a lawsuit whenever the claim, as alleged, could possibly fall within the policy's coverage. It is triggered by the allegations in the claim, not by whether you are actually found liable.
Does the insurer defend me even if the lawsuit is groundless?
Generally yes. Canadian courts have held that the duty to defend arises from the mere possibility that the pleaded claim falls within coverage, so insurers commonly must defend even weak or exaggerated claims. Defending groundless claims is a core part of what liability insurance buys.
When does the duty to defend end?
Commonly when the policy limit is exhausted — once the insurer has paid out its full limit in settlement or judgment, its obligation to keep funding your defence generally ends. An umbrella or excess policy can pick up the defence from there.
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