Ontario Business Corporations Act (OBCA)

The Business Corporations Act, R.S.O. 1990, c. B.16, usually called the OBCA, is Ontario's general corporate statute. Under section 2 it applies to every body corporate with share capital incorporated under Ontario legislation, with listed exceptions such as co-operatives, credit unions and certain insurers. In practice it governs every business corporation incorporated or continued in Ontario. The consolidated text is on Ontario e-Laws.

The Act follows a corporation from incorporation to dissolution: how it is created, how shares are issued and transferred, who makes which decisions, what records it keeps, how it changes its structure and what a shareholder can do when things go wrong. It works with a general regulation (R.R.O. 1990, Reg. 62), with forms approved by the Director, and with filings made through the Ontario Business Registry. In the statute, the Director means the government official appointed under section 278, not a member of a corporation's board.

Some matters sit outside the OBCA. Companies incorporated federally under the Canada Business Corporations Act are governed by that Act wherever they operate; the trade-offs between the two are covered in our guide to Ontario vs. federal incorporation. Ontario not-for-profit corporations fall under the Not-for-Profit Corporations Act, 2010. The Initial Return, annual returns and notices of change come from a separate statute, the Corporations Information Act, and operating names are registered under the Business Names Act.

The Act is divided into 18 parts. Gaps in the numbering reflect repealed sections.

Incorporation (sections 4–7). One or more individuals or corporations sign articles of incorporation and send them to the Director. The certificate of incorporation is conclusive proof that the corporation exists from the date set out in it.

Dealing with outsiders (sections 19 and 21). Under the indoor management rule, people dealing with the corporation may generally assume its internal procedures were followed. A person who signs for a corporation that does not yet exist is personally bound until the corporation adopts the contract, unless it says otherwise; see pre-incorporation contracts.

Shares (sections 22–42). Directors issue shares at the times, to the persons and for the consideration they decide, subject to the articles, by-laws and any unanimous shareholder agreement (section 23). Existing shareholders have pre-emptive rights only if the articles or a unanimous shareholder agreement provide them (section 26).

Shareholders (sections 92–108). Shareholders are not liable for the corporation's obligations except in a few listed cases (section 92). The directors must call the first annual meeting within 18 months of incorporation and later ones within 15 months of the last, unless the shareholders act by written resolution instead (sections 94 and 104). A unanimous shareholder agreement can move board powers to the shareholders (section 108).

Directors and officers (sections 115–137). The board manages or supervises management (section 115), appoints officers (section 133), and every director and officer owes the statutory directors' duties of loyalty and care (section 134). Directors are jointly and severally liable to employees for up to six months' unpaid wages and up to 12 months' accrued vacation pay (section 131). Our entry on shareholders, directors and officers explains how the roles divide.

Fundamental changes (sections 168–186). Amending the articles needs a special resolution: two-thirds of the votes cast at a meeting, or the written consent of every voting shareholder. Selling all or substantially all of the corporation's property outside the ordinary course of business also needs a special resolution (section 184), and listed changes trigger dissent rights to be paid fair value (section 185).

Remedies (sections 245–261). Shareholders can ask the court for leave to bring a derivative action in the corporation's name (section 246) or seek the oppression remedy for unfairly prejudicial conduct (section 248).

Many of these rules are defaults. Sections often begin "subject to the articles" or "unless the by-laws otherwise provide", so a corporation's constating documents can change the result. Where a document conflicts with a mandatory rule, the statute prevails.

The e-Laws consolidation current in October 2026 runs from October 1, 2025 and lists S.O. 2024, c. 15 as the latest amending statute. These are the in-force changes that matter most to private corporations:

A few amendments have passed but were not in force as of October 2026. They include the 2024 change that will refer to the Veterinary Professionals Act, 2024 in the professional corporation rules, the repeal of the definitions of resident Canadian and non-resident corporation, and a 2020 provision tied to the Alternative Filing Methods for Business Act, 2020. Precedents and by-laws drafted before 2021 often still contain a residency requirement or assume in-person meetings, so review them against the current text.

Northline Freight Inc. is an OBCA corporation in Mississauga owned by Marcus Bell (60%), Farah Qureshi (25%) and Daniel Osei (15%). Its 2019 by-law still requires in-person shareholder meetings and a resident Canadian on the board.

In 2026 the owners want to fill a vacant board seat with Marcus's U.S.-resident business partner. The statutory residency rule was repealed in July 2021, so only the by-law stands in the way. The board amends it to drop the residency requirement and allow virtual meetings, and the shareholders confirm the change. Marcus and Farah, together holding 85% of the voting shares, sign a written resolution electing the new director, who consents in writing, and the corporation sends Daniel the resolution and an explanation within 10 business days, as section 104 requires. A Notice of Change is filed under the Corporations Information Act.

Later that year a buyer offers $4.2 million for all of Northline's operating assets. Because this is a sale of substantially all its property, section 184 requires approval by special resolution, and the meeting notice must tell shareholders they may dissent. Daniel sends a written objection before the meeting and votes against. Marcus and Farah vote for the sale, which passes with 85% of the votes cast. Daniel then demands the fair value of his shares under section 185, which the parties negotiate with a valuator's help.