Most owners assume the beneficial ownership rules are about shell companies and money launderers. The rules were written with them in mind. The paperwork lands on you if you are the dentist with a holding company, one of three founders with a shareholders' agreement, or the family whose shares sit in a trust — and in my experience most of those corporations have either no register at all or one that was filled in once and never touched again.
That was a quiet problem while the register stayed in a binder. A register you have to file with the province is a different thing.
What Ontario has announced
In the 2025 Fall Economic Statement, Ontario proposed amending the Corporations Information Act to create a Beneficial Ownership Registry for privately held business corporations, to be implemented in 2027. Covered corporations would file their beneficial ownership information through an online registry, and listed entities — law enforcement, tax authorities and regulators — would get access to some or all of it. The province's stated reason is that investigators currently have to ask each corporation for its register, which slows them down. The 2026 budget repeated the 2027 commitment.
The design is not final: the details depend on legislation and regulations that have not yet been passed, and the Ministry of Public and Business Service Delivery and Procurement has been consulting. The Ontario Federation of Agriculture's submission of September 2026 gives a sense of what is on the table: it objects to a separate 60-day annual filing deadline and asks that any publicly accessible information be limited to the owner's municipality rather than a full residential address. Both points suggest the proposal contemplates more public access than the current request-only regime. I would treat those details as likely but unsettled until the regulations are published.
Ontario is not first. Federal (CBCA) corporations have filed their individuals-with-significant-control information with Corporations Canada since January 2024, Quebec has required beneficial-owner disclosure in its enterprise register since 2023, and British Columbia has committed to a public registry of its own.
Who is an individual with significant control?
The OBCA test is wider than "who owns 25%." An individual has significant control if they are the registered holder or beneficial owner of, or have direct or indirect control or direction over, shares that carry 25% or more of the votes or that represent 25% or more of the fair market value of all outstanding shares. Two further rules catch most people by surprise:
- Joint control counts. Individuals who act together — under a voting agreement, a unanimous shareholder agreement, or an informal understanding to vote as a block — are each treated as having significant control if their combined holdings reach the threshold. Three equal founders with a voting agreement are three individuals with significant control even though none owns 25% alone.
- Control in fact counts. Someone with direct or indirect influence that, if exercised, would result in control in fact is an individual with significant control regardless of how many shares they hold. The founder who sold down to 15% but still runs the board may be one.
Shares held through a holding company or a trust are traced through to the individuals behind them. For a family trust, that usually means looking at the trustees who control the shares and, depending on the trust's terms, the beneficiaries — which is where most family-business registers go wrong. If you used a trust to multiply the capital gains exemption, assume your register needs work.
What the register has to contain today
| Required item | What it means in practice |
|---|---|
| Name, date of birth and latest known address | For every individual with significant control, not just registered shareholders |
| Jurisdiction of residence for tax purposes | Matters for non-resident owners and cross-border families |
| Date each person became, and ceased to be, an individual with significant control | A history, not a snapshot — former controllers stay on the record |
| A description of how each person qualifies | Including their interests and rights in the shares |
The register must be reviewed at least once each financial year and updated within 15 days of the corporation becoming aware of new information. A corporation that fails to keep it commits an offence with a fine of up to $5,000. A director or officer who knowingly authorizes or permits the failure, or a false entry, faces a fine of up to $200,000, up to six months' imprisonment, or both — and the same penalties apply to a shareholder who knowingly fails to answer the corporation's request for information accurately and completely.
What goes wrong when a register has to be filed
The common failures are not exotic. A register that lists only the registered shareholders and misses the people behind a holding company. A trust that appears as a single line. A shareholders' agreement that creates joint control nobody recorded. A founder who left two years ago and was simply deleted rather than shown as having ceased. A residential address from 2023. Each of these is harmless in a binder nobody opens. Filed with the province, each becomes a public or semi-public statement by the corporation that is wrong — signed off by directors who are personally exposed if they knew.
The second problem is privacy. If some ownership information becomes publicly accessible, owners who have never thought about who can see their home address will want to know before the first filing, not after. Some will want to change how they hold their shares. That kind of reorganization takes time and, in a family structure, tax advice.
What to do before 2027
- Find the register. If it does not exist, the corporation is already out of compliance; build it now.
- Reconcile it against the securities register, the shareholders' agreement, any voting or trust arrangements, and every holding company in the chain.
- Ask in writing. The OBCA lets the corporation request information from shareholders, and a shareholder who knowingly answers inaccurately carries the penalty. A short annual request letter is the simplest evidence of reasonable steps.
- Diarize the annual review to the financial year-end, with the 15-day update rule built into your process for share transfers and new agreements.
- Decide on privacy now. If public access to addresses concerns you, raise it before the registry opens, when changes are cheapest.
This is ordinary minute-book work, and it is the kind I quote as a fixed fee: review the minute book, build or correct the register, and leave the corporation with a request letter and a calendar it can run on its own. If you are setting up a new company, the register should come out of the incorporation finished, not as a to-do.
I track the registry's legislation and filing details in Money for Business, the monthly update on funding, tax and legal changes for Ontario owner-operators. When the regulations are published, the details will be there.
The register was always mandatory; in 2027, Ontario plans to start actually reading it.
Common questions
When does Ontario's beneficial ownership registry start?
Ontario has said the registry for privately held business corporations will be implemented in 2027. It depends on amendments to the Corporations Information Act and regulations that had not been finalized as of October 2026, so the exact launch date and first filing deadline are not yet set.
Do private Ontario corporations already need a beneficial ownership register?
Yes. Since January 1, 2023, every private corporation under the Ontario Business Corporations Act must keep a register of individuals with significant control at its registered office or another location in Ontario. Public corporations and their wholly owned subsidiaries are exempt.
Who is an individual with significant control in Ontario?
An individual who owns or controls, directly or indirectly, shares carrying 25% or more of the votes or 25% or more of the fair market value of all shares; individuals who jointly reach that threshold under an agreement or arrangement; and anyone with influence that would result in control in fact.
Will Ontario's beneficial ownership registry be public?
The government has described access for law enforcement, tax authorities and regulators. Industry submissions to the ministry in 2026 indicate the proposal also contemplates some public access, with debate over whether full residential addresses should be published. Treat public access as possible until the regulations are released.
What is the penalty for not keeping an ISC register in Ontario?
The corporation can be fined up to $5,000. A director or officer who knowingly permits the failure, or a false or misleading entry, faces a fine of up to $200,000, up to six months' imprisonment, or both. The same penalties apply to a shareholder who knowingly gives the corporation inaccurate information.
How often must the register be updated?
At least once every financial year, and within 15 days of the corporation becoming aware of information that should be added or changed.
Does a family trust have to be shown on the register?
The trust itself is not an individual. The register must identify the individuals who control the shares through it — typically the trustees, and depending on the trust's terms, beneficiaries. Family trusts are the most common source of incomplete registers.
Are federal corporations covered by Ontario's registry?
No. Corporations incorporated under the Canada Business Corporations Act already file individuals-with-significant-control information with Corporations Canada. Ontario's registry is aimed at corporations under Ontario's Business Corporations Act.