If you own a corporation in Ontario, you must stay on top of your Ontario Business Registry filings. These filings help you meet the legal requirements for corporate compliance in Ontario. Two of the most common filings are the annual return and the notice of change in Ontario. While they may seem similar, they serve different purposes.
This blog will help clarify the differences, explain when each is required to file, and outline what you need to know to avoid late penalties or possible dissolution.

What is an Annual Return?
An annual return in Ontario is a yearly filing used to confirm your corporation’s information with the government. It ensures the corporate records on file are accurate and current. This includes your registered office address and the names and addresses of your directors and officers.
- You must file an annual return every year, even if your corporate details haven’t changed.
- These are annual filings and are typically due within 6 months of your fiscal year end date.
- Missing filing deadlines for Ontario corporations can result in possible administrative dissolution.
- This is mandatory under the Ontario Business Corporations Act. Annual Returns are also mandatory for Federal corporations under the Canada Business Corporations Act.
You can file your annual return online through the Ontario Business Registry. You can also use an intermediary like Ontario Business Central to file it for you. Our guide on How to File an Annual Return in Ontario explains the full process. It covers what to prepare, where to file, and how to meet important filing deadlines Ontario corporations must follow.
What is a Notice of Change?
You only need to file a notice of change in Ontario when specific corporate details change. This includes any time you need to:
- Update directors/officers address in Ontario
- Add or remove directors and officers
- Change your registered office address
- Change your business activity
Unlike annual returns, you only file these when something changes. You must submit them within 15 days of the change to stay compliant.
- Filing keeps your public record current.
- Submitting a notice of change ensures your business avoids delays in banking, legal matters, or regulatory processes.
Annual Return vs Notice of Change: Key Differences
To better understand the distinctions between these two Ontario corporate filings, here’s a quick breakdown:
| FEATURE | ANNUAL RETURN ONTARIO | NOTICE OF CHANGE ONTARIO |
|---|---|---|
| Purpose | Confirm current details | Reflect changes to corporate details |
| Changes Allowed | Corporate AddressDirector Address(s)Add/Remove DirectorsBusiness Activity(NAICS Code)Email Address | Corporate AddressDirector Address(s)Add/Remove DirectorsBusiness Activity(NAICS Code)Email Address |
| When Required | Every year | After change to address or officers |
| Deadline | Within 6 months of fiscal year end | Within 15 days of the change |
| Penalties | Risk of dissolution | Non-compliance issues, delays |
- The annual return is a regular annual filing. You only file a notice of change when your business details change.
- One confirms information; the other updates it.
- Both are part of your ongoing obligations for corporate compliance in Ontario.
How to File Both with Ontario Business Central
At Ontario Business Central, we make it easy to file your annual return or notice of change in Ontario. You don’t need to create an OBR account or navigate government portals on your own. We guide you through every step, help you avoid mistakes, and complete your filing quickly and accurately. We also send business owners reminders for when future annual returns are due.
To complete these filings, you’ll need:
- Your corporation’s Ontario Corporation Number (OCN)
- Your Ontario Company Key
- Details of the changes required (if applicable).
You also have the option to file directly through the Ontario Business Registry. However, many businesses in Ontario choose Ontario Business Central for a faster and more supported experience.

Why These Filings Matter for Corporate Compliance in Ontario
Timely submission of both documents is vital for keeping your corporation in good standing. Neglecting to file can:
- Lead to the dissolution of your profit corporation
- Create risks for failing to meet legal requirements
- Prevent you from opening business accounts or obtaining financing
- Cause issues when selling your business or bringing on investors
These filings also tie into maintaining your corporate records, ensuring all official documentation is consistent across platforms. You should include both the annual return and notice of change in your corporate minute book. These records help prove that your corporation meets legal requirements and stays in good standing.
To learn how to set one up, read our blog on How to Create a Corporate Minute Book. It explains what to include and how to keep your book organized.
Annual Returns, Notices of Change, & Minute Books
Your minute books should reflect the information you’ve filed through the Ontario Business Registry. Keeping accurate minute book updates Ontario ensures you have:
- A documented history of directors and officers changes
- Records of your registered office address and any updates
- Proof of compliance for internal reviews, audits, or legal proceedings
Under the Corporations Information Act, failure to keep your minute books current may result in additional compliance issues.
Summary Checklist
Here’s a quick recap to help you remember the differences:
✔ Annual Return Ontario = Yearly filing to confirm corporation details
✔ Notice of Change Ontario = Filed within 15 days of changes to corporate details
✔ Both = Key Ontario Business Registry filings for maintaining corporate compliance in Ontario
Staying up to date keeps your corporate records accurate and your public record current. It also helps your Ontario corporate business stay legal and efficient.
If you’re just starting your business, you may not know whether you need to file these documents. Our Incorporation & Business Registration guide explains how to register a business in Ontario. It also covers the key steps and responsibilities of becoming a corporation in Ontario.
inquiries@ontariobusinesscentral.ca
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Ontario Business Central Inc. is not a law firm and cannot provide a legal opinion or advice. This information is to assist you in understanding the requirements of registration within the chosen jurisdiction. It is always recommended, when you have legal or accounting questions that you speak to a qualified professional.



