Ontario corporations incorporated under the Ontario Business Corporations Act (OBCA) are legally required to maintain a minute book containing specific corporate records from the date of incorporation. Failing to do so is not merely an administrative oversight — it is a statutory violation that can attract penalties, complicate transactions, and expose directors to personal liability.

What Is an Ontario Corporate Minute Book?

A minute book is the official repository of a corporation's foundational and ongoing governance records. For Ontario corporations, the minute book is the primary evidence that the corporation has been properly constituted and is operating in compliance with the OBCA. Whether you are raising capital, selling the business, applying for financing, or filing taxes, a current and complete minute book is invariably the first thing a lawyer or accountant will ask to review.

If you are unfamiliar with the concept, our guide on what is a minute book provides a solid foundation before diving into the Ontario-specific requirements below.

OBCA Minute Book Requirements: What the Statute Actually Says

Section 140 OBCA — The Core Obligation

Section 140 of the Ontario Business Corporations Act is the governing provision. It requires every Ontario corporation to prepare and maintain the following records:

• Articles of incorporation and all amendments — the constating document that brought the corporation into existence
• By-laws and all amendments — the internal governance rules of the corporation
• Minutes of meetings of shareholders
• Minutes of meetings of directors
• Shareholder resolutions in writing
• Director resolutions in writing
• A register of directors — names, addresses, and dates of appointment and resignation
• A register of officers — names, addresses, and positions held
• A register of shareholders — including names, addresses, and details of share ownership
• A securities register — recording all issued shares and transfers

These records must be kept at the corporation's registered office in Ontario or at another location in Ontario designated by a resolution of the directors — provided that location is reasonably accessible.

What Must Be Kept at the Registered Office

Section 140(3) OBCA requires that the following documents be available at the registered office during normal business hours for inspection by shareholders and creditors:

• The articles and by-laws, as amended
• The minutes of shareholder meetings and shareholder resolutions in writing
• The register of shareholders
• The register of directors

Directors and their authorised agents have broader inspection rights and may examine the full minute book. Shareholders are entitled to obtain copies of certain records for a reasonable fee.

The ISC Register: Ontario's 2023 Addition

One of the most significant recent changes to Ontario corporate law came into force on 1 January 2023: the mandatory Individual with Significant Control (ISC) register.

Under sections 140.1 through 140.3 of the OBCA (as amended by the Strengthening Protection for Ontario Businesses Act, 2021), every private Ontario corporation must now maintain a register identifying every individual who has significant control over the corporation.

Who Is an Individual with Significant Control?

An individual has significant control over a corporation if that person, alone or jointly with others:

• Holds or controls, directly or indirectly, 25% or more of the voting shares, or shares that carry 25% or more of the fair market value of all issued shares; or
• Has any direct or indirect influence that, if exercised, would result in control in fact of the corporation.

What the ISC Register Must Contain

For each ISC, the register must record:

• Full legal name
• Date of birth
• Last known address
• Jurisdiction of residence for tax purposes
• Date on which the person became or ceased to be an ISC
• A description of the individual's interest or right that makes them an ISC

ISC Register Obligations

Corporations must take reasonable steps to identify all ISCs on an annual basis, and at any other time when the corporation becomes aware of a change. The information must be updated within 15 days of the corporation becoming aware of a change.

Unlike the federal register under the Canada Business Corporations Act, the Ontario ISC register is not currently filed publicly — it is kept privately at the registered office. However, it must be produced to Ontario authorities on request, and the obligation to maintain it accurately is real and ongoing.

Ontario Annual Resolution Deadline: 6 Months After Fiscal Year-End

One of the most frequently missed obligations for Ontario corporations is the annual resolution requirement. Under section 104 of the OBCA, the directors must place the financial statements before the shareholders at an annual meeting or by written resolution in lieu of a meeting within six months after the end of each fiscal year.

In practice, the vast majority of Ontario private corporations satisfy this requirement by passing an annual shareholder resolution in writing (in lieu of holding an actual meeting), which:

• Approves the financial statements for the year
• Appoints or reappoints the auditor (or waives the audit requirement, where permitted)
• Reappoints or confirms directors
• Deals with any other business ordinarily transacted at an annual meeting

The deadline is strict: if your fiscal year ends on 31 December, the annual resolution package must be completed no later than 30 June of the following year. Many business owners and their accountants treat this deadline as coinciding with the tax filing deadline, but the two are separate obligations.

Use our compliance deadline calculator to track your corporation's specific annual resolution deadline.

Ontario Professional Corporations: Additional Requirements

Ontario regulates professional corporations (PCs) — corporations formed by regulated professionals such as lawyers, doctors, accountants, engineers, architects, and others — under both the OBCA and the governing legislation of the relevant regulatory college or law society.

Extra Minute Book Requirements for Ontario PCs

In addition to the standard OBCA records, Ontario professional corporations must maintain evidence in their minute books of the following:

• Compliance with share ownership restrictions — in most professions, only licensed members of the regulated profession may hold voting shares; the minute book must demonstrate this at all times
• Certificate of authorization or permit from the governing body — and any renewals
• Resolutions addressing ongoing eligibility — if a shareholder ceases to be a licensed member of the profession, the minute book should reflect the steps taken to remediate the situation
• Professional corporation designation in the name — evidence that the corporation is using its proper name consistent with the authorisation

Law firms should be aware that the Law Society of Ontario imposes its own record-keeping requirements that dovetail with but are distinct from the OBCA obligations.

Ontario vs Federal (CBCA) Minute Book: Key Differences

Ontario-incorporated corporations and federally-incorporated corporations operating in Ontario are subject to different (though similar) regimes. If you are unsure which applies to you, the short answer is: if you incorporated in Ontario using the Ontario government's forms, you are under the OBCA; if you incorporated federally through Corporations Canada, you are under the CBCA.

The practical day-to-day compliance obligations are broadly similar, but Ontario corporations do not have access to Corporations Canada's online corporate registry and must manage their registered office and filings through the Ontario Business Registry.

Where to Keep the Minute Book in Ontario

Registered Office Requirement

The default rule under section 140 OBCA is that the minute book must be kept at the corporation's registered office in Ontario. The registered office must be a physical address in Ontario where documents can be served — a P.O. box alone is not sufficient.

Alternative Location by Director Resolution

Directors may by resolution designate another location in Ontario where the records will be kept, provided that location is accessible to shareholders and creditors for inspection purposes during normal business hours.

Virtual Minute Books

The OBCA does not require a physical paper binder. Records may be maintained in electronic form, provided they can be reproduced in intelligible written form. This means a well-structured digital minute book is entirely permissible and, practically speaking, significantly easier to maintain and produce when needed.

However, "stored on someone's hard drive" is not the same as a properly maintained and organised digital minute book. The records must be complete, up to date, and accessible. A disorganised folder of PDFs does not meet the spirit — or in many cases the letter — of the requirement.

Ontario Penalties for Non-Compliance

Non-compliance with OBCA minute book requirements is not theoretical. The consequences include:

• Director liability — directors who knowingly permit contraventions of the OBCA may be personally liable
• Regulatory penalties — the OBCA provides for offences and fines for contravention of its provisions; individuals can be fined up to $2,000 and corporations up to $25,000 per offence in certain circumstances
• Transaction failure — the most common practical consequence: a share sale, business acquisition, or financing transaction collapses or is delayed because the minute book cannot be produced in a form satisfactory to the buyer's or lender's counsel
• CRA scrutiny — a missing or incomplete minute book can complicate tax audits, particularly where salary versus dividend decisions, shareholder loans, or corporate reorganisations are in issue
• Loss of good standing — a corporation that fails to maintain proper records may have difficulty obtaining a certificate of status from the Ontario Business Registry

For a deeper look at how to build a compliant minute book from scratch, see our guide on how to create a corporate minute book in Canada.

How MinuteKeep Handles OBCA-Specific Requirements

MinuteKeep is built specifically for Canadian corporations, with full support for Ontario's OBCA requirements built into the platform from the ground up.

What MinuteKeep Does for Ontario Corporations

• Ontario-specific document templates — by-laws, shareholder resolutions, director resolutions, and annual consent packages drafted with OBCA language and statutory requirements in mind
• ISC register tracking — a dedicated ISC register module that prompts annual review and captures all required fields under the 2023 amendments to the OBCA
• Annual resolution deadline reminders — MinuteKeep calculates your six-month deadline from your fiscal year-end and sends automated reminders so the deadline is never missed
• Registered office compliance — record-keeping that satisfies the section 140 requirement, with cloud-based storage accessible from anywhere while remaining properly organised and auditable
• Professional corporation support — additional fields and document types for Ontario PCs, including share ownership compliance tracking
• Ontario Business Registry integration guidance — MinuteKeep keeps your internal records in sync with your annual filing obligations under the Ontario Business Registry

Built for Accountants and Business Owners

MinuteKeep is designed so that business owners can maintain their own minute book with confidence, and so that accountants can manage minute books for multiple clients efficiently from a single dashboard. Every document produced by MinuteKeep is formatted for review by legal counsel and acceptable for production in a transaction or audit.

Summary: Ontario Minute Book Compliance Checklist

Before closing, here is a practical checklist for Ontario corporations:

• Articles of incorporation and all amendments on file
• By-laws adopted and signed, all amendments recorded
• Register of directors — current and complete
• Register of officers — current and complete
• Register of shareholders — current and complete
• Securities register — all issued shares and transfers recorded
• Minutes of all director and shareholder meetings
• All written resolutions of directors and shareholders on file
• ISC register established and reviewed annually (required since January 2023)
• Annual shareholder resolution completed within 6 months of fiscal year-end
• If a professional corporation: certificate of authorisation and share ownership compliance documented
• Minute book kept at registered office or designated Ontario location in accessible form

Get Started with MinuteKeep

Maintaining a compliant Ontario minute book does not have to be a burden. MinuteKeep gives Ontario business owners and their accountants a structured, legally-informed platform to create, maintain, and produce minute books that meet every OBCA requirement — including the 2023 ISC register amendments.

Try MinuteKeep free at minutekeep.ca and have your Ontario corporation's minute book in order before your next annual resolution deadline.