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What Is Fair Value for Dissenting Shareholders in Ontario?

Understand how dissent rights work for Ontario shareholders who oppose a major corporate change, what fair value means, and why timing matters so much.

Buying & Selling a Business5 min readTSLBy the Treadstone Law Team · OntarioUpdated November 6, 2026
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Key takeaways
  • Dissent is a separate route from oppression, and whether it is open to you depends on the proposed change, so get advice early.
  • Timing matters in a shareholder dispute, so confirm any steps and dates with a lawyer before the meeting.
  • Oppression is a different route with its own test, set out in OBCA s. 248.

Sometimes a corporation proposes a change that a shareholder cannot accept, such as a sale of the business or a restructuring that changes what the shares are. Dissent rights exist so that a shareholder in that position can leave and be paid, rather than being pulled along against their will.

This article explains the idea in plain terms. It does not set out step-by-step deadlines, because those depend on the type of change and the exact wording of the statute, and they are strict. Get advice before the shareholder meeting, not after.

What dissent rights are

A dissent right is a route under the Ontario Business Corporations Act (OBCA) that may be open to a shareholder who opposes a major corporate change and wants out. It is not a way to overrule every decision the majority makes. Whether it applies depends on the change and the exact wording of the statute, so it is worth confirming with a lawyer.

Because dissent is a statutory process, the details matter, and a shareholder's general sense of unfairness is not the same thing as following the process. How this applies depends on your situation, so it is worth confirming with a lawyer.

When can you use it

Whether you have a dissent right depends on what the corporation is doing and on how your shares are affected. A lawyer should check the current statute against the specific proposal. Useful questions to bring to that conversation include:

Not every proposal gives a right in every case, so do not assume either way until the proposal has been reviewed.

What fair value means

Fair value is a way of describing what shares are really worth, as opposed to whatever figure one side puts forward. How it is worked out in a dissent depends on the statute and the facts, so confirm the approach with a lawyer. In practice, valuation is often where the parties disagree most.

Expert opinions can differ widely. In an oppression case, the Court of Appeal for Ontario upheld a damages award based on a trial valuation set between two experts' figures of $20.8 million and $52.8 million. Dissent valuation disputes can involve similar differences, although that case was not a dissent case.

Questions such as the valuation date and whether a later sale price counts also come up in buyout valuations. Whether and how they apply to a dissent depends on the facts.

Steps and deadlines

Steps and dates depend on the type of change and on the statute, so confirm them with a lawyer before the vote rather than relying on general information.

In general terms, you will want to do the following.

Dissent compared with oppression

Dissent and oppression are different tools. Oppression is under OBCA s. 248, and the Supreme Court of Canada's BCE test asks whether you had a reasonable expectation that was breached and whether the conduct was oppressive, unfairly prejudicial or unfairly disregarded your interests.

DissentOppression
Depends on the type of change proposedTied to unfair treatment of your interests
Steps and timing to confirm with a lawyerAssessed by a court using the BCE test
How it applies depends on your situationCourt of Appeal upheld a finding that refusing to redeem a terminated shareholder's shares was oppressive

To see how oppression can look in practice, the Court of Appeal for Ontario has upheld a finding that refusing to redeem a terminated shareholder's shares was oppressive. Whether your own situation fits that kind of pattern depends on the facts.

What to do next

Act as soon as you hear about the proposal. Collect the shareholders agreement, articles, financial statements and the meeting materials, and speak to a lawyer and an accountant before the vote. If you also feel you have been treated unfairly, ask whether oppression is a better or an additional route.

If the change is a sale of the business, other rules may matter alongside your shareholder rights. Points worth raising with your lawyer and accountant include:

How these points apply depends on the deal, so it is worth confirming them before the vote.

Frequently asked questions

Can I dissent from any decision I disagree with?

Not necessarily. Whether dissent is open to you depends on what the corporation is proposing and on the wording of the statute. A lawyer can check whether your situation qualifies.

Who decides fair value?

How fair value is set depends on the statute and the facts, so it is worth confirming with a lawyer. Expert valuation evidence can matter in share disputes, as in the oppression case where the Court of Appeal upheld an award based on a valuation set between two experts' figures.

Is there a deadline to dissent?

Timing can matter a great deal, so do not wait to see what happens at the meeting. The exact dates depend on the proposed change, so confirm them with a lawyer before the meeting.

Can I use dissent and oppression together?

They are separate tools with different tests. Oppression asks whether your reasonable expectations were breached. A lawyer can advise which one, or both, may fit your facts.

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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