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ARTICLE · 24 AUGUST 2026

Unanimous Shareholder Agreements: Three Tax Pitfalls Business Owners Must Avoid

Miller Thomson
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Business owners often overlook the tax implications of unanimous shareholder agreement provisions, which can trigger unintended changes in corporate control, loss of Canadian Controlled Private Corporation status, and deemed year-ends with significant consequences. Understanding how provisions affect de jure and de facto control, share option rights, and acquisition of control rules is essential before finalizing these powerful governance documents.

CanadaTax
Pierce Quaghebeur
Pierce Quaghebeur
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Whether you are starting a new business or considering adding shareholders to your existing business, a unanimous shareholder agreement can be one of the most powerful tools available to business owners, and one of the most expensive to get wrong. The tax implications of certain USA provisions are frequently overlooked at the drafting stage, yet they can trigger unintended changes in corporate control, loss of CCPC status, and deemed year-ends with significant tax consequences. A key consideration should be whether a unanimous shareholder agreement (“USA”) makes sense for you and, if so, what provisions it should contain.

This article identifies three pitfalls business owners and their advisors should understand before finalizing a USA.

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