No-Contest Clauses in Ontario Wills: Are They Enforceable?

Some people, worried about family conflict after they're gone, ask their lawyer to add a clause saying that any beneficiary who challenges the will loses their inheritance. These are usually called no-contest clauses, or by the older legal term in terrorem clauses. Whether they actually work the way people expect is more complicated than the name suggests.

What Is a No-Contest Clause?

A no-contest clause is a condition attached to a gift in a will, stating that a beneficiary forfeits (loses) that gift if they challenge the will, contest its validity, or take certain other legal action against the estate. The idea is to discourage litigation by making a challenge costly to the person bringing it — even if unrelated to whether the challenge would have succeeded.

The General Rule: Often Enforceable, But Not Absolute

Ontario courts have generally been willing to give effect to a properly drafted no-contest clause. It is a long-recognized estate-planning tool, and testators have wide latitude to attach conditions to gifts they make in their own will. But "generally enforceable" is not the same as "always enforceable" — there are real limits, and how a specific clause is worded matters a great deal.

Why a "Gift Over" Matters

A classic legal distinction is between a condition that is merely in terrorem — intended only to frighten a beneficiary out of challenging, with no real backup plan if they do — and a condition that includes a genuine gift over, meaning the will names who receives the forfeited gift instead. Where a clause has no gift over and appears to exist purely to threaten, courts have historically been more willing to treat it as unenforceable. Where the will clearly directs where the gift goes if the condition is triggered, the clause is more likely to be treated as a genuine, enforceable condition rather than an empty threat.

Situations Where Enforcement Becomes Uncertain

• Statutory claims. A no-contest clause is generally understood to have real limits against claims that arise from statute rather than from the will itself — for example, a dependant's support claim under the Succession Law Reform Act exists independently of what the will says, and a private clause is unlikely to override a statutory right in that way.
• Good-faith challenges on reasonable grounds. Some Ontario decisions have shown reluctance to enforce a forfeiture where a beneficiary's challenge was brought honestly and on reasonable grounds — for instance, a genuine question about capacity — rather than as a tactical or frivolous attack. This area is fact-specific and continues to develop, so it should not be relied on as a guaranteed exception.
• Ambiguous drafting. A clause that is vague about what conduct triggers forfeiture, or what happens to the forfeited gift, is more likely to be challenged on its own terms, separate from the underlying will dispute.

Should You Include One in Your Will?

• [ ] Consider why you want the clause — is it to discourage a specific anticipated conflict, or a general precaution?
• [ ] Understand that it will not stop a statutory dependant's support claim from being brought.
• [ ] Make sure the clause includes a clear gift over, naming who receives the gift if it's forfeited.
• [ ] Recognize that it cannot guarantee no one will ever challenge the will — it changes the risk calculation, not the legal right to bring a claim.
• [ ] Have the clause drafted (or reviewed) by a lawyer familiar with current Ontario estate litigation trends, since enforceability can turn on specific wording.

Frequently asked questions