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When Must an Ontario Director Disclose a Conflict of Interest?

What the OBCA generally expects a director to disclose when they have a personal interest in a contract the corporation is considering, and why it matters.

Corporate5 min readTSLBy the Treadstone Law team · OntarioUpdated 2026-07
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Key takeaways
  • Directors of an Ontario corporation owe the corporation a fiduciary duty — to act honestly and in good faith, in the corporation’s best interests — along with a duty of care, to bring…
  • - The director, or a company they control, is a party to a contract or proposed transaction with the corporation.
  • - Disclosing the nature and extent of the interest to the board — generally as soon as the director becomes aware the corporation is considering the contract, or at the meeting where…

Small and family-run corporations often deal with a lot of related-party arrangements without a second thought: a director-owner leasing property to their own company, a family member’s business getting the supply contract, or a director sitting on the board of another company the corporation now wants to do business with. None of these situations are automatically improper — but each one is a conflict of interest, and Ontario corporate law expects the director involved to disclose it before the corporation moves ahead.

Understanding when disclosure is required, and what proper disclosure actually looks like, protects both the corporation and the director personally.

The Underlying Duty

Directors of an Ontario corporation owe the corporation a fiduciary duty — to act honestly and in good faith, in the corporation’s best interests — along with a duty of care, to bring the diligence and skill of a reasonably prudent person to their role. The conflict-of-interest disclosure obligation flows directly from the fiduciary duty: a director who has a personal stake in a contract the corporation is considering can’t be relied on to weigh it purely on the corporation’s merits unless that interest is out in the open.

What Counts as a Conflict

What Disclosure Generally Requires

Why This Protects the Director, Not Just the Corporation

Proper disclosure and abstention is generally what allows an otherwise-conflicted contract to stand. If a director fails to disclose a material interest, the contract can potentially be challenged and set aside at the corporation’s request, and the director involved may face personal exposure — including having to account for any profit made from the undisclosed arrangement. Getting the disclosure right at the time is far less costly than untangling it after a dispute arises.

What Should Go in the Minutes

Common Situations That Trigger This in Small Corporations

Frequently asked questions

Does the conflicted director have to leave the room during the vote?

Practices vary, and by-laws may set out specific procedures, but the safest and most defensible approach is for the interested director to abstain from voting and, where practical, step out of the discussion on that specific item entirely.

What happens if a director simply doesn’t disclose a conflict?

The contract can potentially be challenged and set aside at the corporation’s request, and the director involved may face personal exposure for any profit made from the arrangement — exactly the kind of dispute that early, documented disclosure is meant to avoid.

Does this obligation apply to officers too, or just directors?

The underlying fiduciary duty, and much of the same reasoning around disclosure, generally extends to officers of the corporation as well, though the specific procedural mechanics in the statute are framed primarily around directors.

Is disclosure a one-time thing, or does it need to happen every time?

A standing disclosure covering an ongoing relationship (for example, "I am also a director of Company X") is often used to cover recurring dealings, but a genuinely new or materially different transaction usually calls for fresh, specific disclosure at the time.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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