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How Ontario Directors Can Protect Themselves from Personal Liability

A practical guide for Ontario directors: due diligence, D&O insurance, indemnification, resignation timing, and board hygiene to limit personal liability.

Corporate5 min readTSLBy the Treadstone Law team · OntarioUpdated 2026-06
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Key takeaways
  • The due diligence defence runs through almost every director liability regime.
  • The OBCA permits a corporation to indemnify its directors and officers against costs, charges, and expenses — including legal fees and settlement amounts — arising from claims made…
  • D&O insurance transfers the financial risk of director and officer liability claims to an insurer.

Serving as a director of an Ontario corporation carries genuine personal financial risk. Between employment standards wage liability, CRA source deduction assessments, duty-of-care claims, and oppression applications, the list of ways a director can end up personally on the hook is longer than most people realize when they accept the position.

None of this means you should refuse every board appointment. But it does mean you should understand — before you sit down at your first meeting — what protections are available, how to activate them, and what gaps to watch for. This article walks through the five most important layers of director protection: due diligence, indemnification, D&O insurance, resignation, and board hygiene.

1. The Due Diligence Defence: Your Foundation

The due diligence defence runs through almost every director liability regime. Whether the claim involves unpaid wages under the Employment Standards Act, 2000, unremitted source deductions or HST under federal law, or a breach of the duty of care under the Business Corporations Act (Ontario) (OBCA), a director who exercised reasonable care to prevent the problem stands in a much better position than one who did not.

What reasonable care looks like depends on the context, but certain elements appear consistently:

Document everything. Notes, emails, and board minutes that reflect your engagement are the evidence you will need if a claim is ever made.

2. Indemnification by the Corporation

The OBCA permits a corporation to indemnify its directors and officers against costs, charges, and expenses — including legal fees and settlement amounts — arising from claims made against them in their capacity as director. In some circumstances, indemnification is not just permitted; it is mandatory.

The key distinction under the OBCA:

Indemnification also covers advancement of legal costs. A corporation can agree to pay a director's legal fees as they are incurred (rather than waiting for the outcome), subject to repayment if the director is ultimately found to have acted improperly. This matters enormously in practice — defending even a baseless claim is expensive, and a director should not have to fund their own defence while the corporation sits on its hands.

Practical note: Indemnification only helps if the corporation has money. A financially distressed company cannot indemnify anyone. This is why indemnification is a complement to D&O insurance, not a substitute.

3. Directors' and Officers' (D&O) Insurance

D&O insurance transfers the financial risk of director and officer liability claims to an insurer. For public companies, it is standard. For private companies — including small Ontario corporations — it is less common but often worth the cost.

What D&O insurance typically covers:

What D&O insurance typically does NOT cover:

Before accepting a director position, review the existing D&O policy — or ask whether the corporation intends to obtain one. Understand the exclusions. A policy that does not cover the most common risks facing the directors of that particular company may provide less comfort than it appears.

4. Resignation: Timing Is Everything

Resignation can stop the accrual of future liability, but it does not undo liability that has already crystallized. Key points:

Resign in writing, with a clear effective date, and follow the filing requirements (discussed in our separate article on resigning as a director). An informal resignation that was never properly documented may not be valid — leaving you on the register as a director longer than you intended.

5. Board Hygiene: The Habits That Protect You

"Board hygiene" refers to the day-to-day practices that demonstrate an engaged, diligent director:

Board minutes. Every meeting should produce minutes that capture who attended, what was considered, and how directors voted. Directors who dissented from a decision should ensure their dissent appears on the record.

Informed decisions. Major decisions should be preceded by a paper trail — management reports, financial analyses, legal or expert opinions where appropriate. Deciding without information is the fastest way to lose the business judgment rule protection that courts would otherwise extend.

Conflict disclosures. Any time you have a personal interest in a matter before the board, disclose it immediately, in writing, and do not participate in the vote. A conflict that is disclosed and managed is a non-issue. A conflict that is concealed is potentially fraudulent.

Separate roles. Where the same person is a sole director and the sole officer, the corporate formalities often get skipped entirely. This is risky. Even in a one-person corporation, board resolutions should be written and filed in the minute book.

Frequently asked questions

If the corporation indemnifies me, do I still need D&O insurance?

Yes. Indemnification is only as good as the corporation's ability to pay. If the company becomes insolvent — often the very scenario in which claims arise — indemnification is worthless. D&O insurance is paid by the insurer, not the corporation.

Does D&O insurance cover personal CRA assessments for unremitted HST?

Usually not. CRA director assessments for source deductions and HST are commonly excluded from standard D&O policies. Review your policy carefully and ask your broker directly.

Can I negotiate indemnification terms before joining a board?

Yes, and you should. Ask to see the corporation's existing indemnification agreement or by-law provision. Negotiate for advancement of legal costs and the broadest indemnification the OBCA permits before you join — it is much harder to negotiate after a problem arises.

What if I am a director of a corporation I also own?

The same rules apply. Many owner-operators assume that because they own the corporation, they cannot be harmed by director liability — but the liability flows to them as individuals, not as shareholders. Wage claims, CRA assessments, and oppression applications all reach the individual.

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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