If you're starting a charity or nonprofit in Canada, especially in Ontario, you might come across something called an OCN number. At first, it may sound confusing, but it’s actually a basic part of your organization’s legal identity. Let’s break it down so it’s easy to understand.

OCN stands for Ontario Corporation Number. It is a unique number given by the Ontario government when your organization is officially incorporated in Ontario. Think of it like a student ID for your charity or nonprofit. Every corporation, including charities, nonprofits, and businesses, gets one once they are legally registered.
In Canada, the term OCN is specific to Ontario. Other provinces have their own systems, and federally incorporated charities or nonprofits receive a federal corporation number instead. But if you are incorporating in Ontario, the OCN is what identifies your organization in the provincial records.
If your charity or nonprofit is federally incorporated but planning to operate in Ontario, you will need to complete extra-provincial registration. After that, you will also be assigned an Ontario Corporation Number, even though your original incorporation was federal. This helps the Ontario government track your organization in its own records.
An OCN is a 7-digit number with no letters or special characters. It typically looks like this: 1234567.
Your OCN appears on official Ontario government documents in these locations:
It's important not to confuse your OCN with other numbers:
Charity Registration Number: 9 digits + RR0001 (e.g., 123456789RR0001)
No, the OCN is not the same as the BN. The BN, or Business Number, is given out by the Canada Revenue Agency (CRA). The BN is used for things like taxes, payroll, and applying for charitable status. The OCN, on the other hand, is just for tracking your incorporation in Ontario.
Here’s a quick way to remember:
Many charities and nonprofits have both numbers. You get the OCN when you incorporate or register in Ontario, and you get the BN when you register for things like GST/HST or apply to become a registered charity.
Your Ontario Corporation Number is usually found on the official incorporation documents you receive after your nonprofit or charity is registered with the Ontario government. It’s often printed on your Articles of Incorporation, or on any Corporation Profile Reports or Notices of Change you may receive.
If your organization is federally incorporated and you’ve done an extra-provincial registration in Ontario, your OCN will be included in the confirmation documents provided after that registration is complete.
If you can’t find your OCN, you can:
If you've misplaced your OCN or need to verify it, here's exactly how to find it:
If your charity or nonprofit is federally incorporated, you'll need to check if you've completed extra-provincial registration in Ontario. If yes, your OCN will be on the extra-provincial registration confirmation documents from Ontario.
Charities and nonprofits use the OCN when:
It’s important to keep this number handy and use it correctly, especially if you're applying for charitable registration or working with the government.
In summary, an OCN number is like a personal ID for your nonprofit or charity if it’s incorporated or registered in Ontario. It’s not the same as your tax number (BN), and you’ll need it for government records and forms. Even federally incorporated organizations will receive an OCN if they register to operate in Ontario. Keeping track of it will help you stay compliant and organized as your organization grows.
You'll be asked for your OCN in these common situations:
Many people use their BN when they should use their OCN, or vice versa. Remember: Ontario government forms need your OCN, while CRA forms need your BN.
Your OCN stays the same for the life of your organisation. It doesn't change when you update your name, address, or directors.
When issuing donation receipts, you need your charity registration number (not your OCN or BN). The charity registration number ends in RR0001.
If you're federally incorporated, you might think you don't need an OCN. However, if you operate in Ontario, you must complete extra-provincial registration and will receive an OCN.
When your directors change or your address updates, you must file a Notice of Change with the Ontario government using your OCN. Failing to do this can result in penalties or administrative dissolution.
Even after becoming a registered charity with CRA, you still need to maintain your Ontario corporate status and file annual returns using your OCN.
An OCN number is like a personal ID for your nonprofit or charity if it's incorporated or registered in Ontario. It's not the same as your tax number (BN) or your charity registration number, and you'll need it for government records and forms. Even federally incorporated organizations will receive an OCN if they register to operate in Ontario.
The OCN is a permanent 7-digit number that identifies your organization in Ontario's provincial records. You'll use it for annual returns, updating corporate information, opening bank accounts, and proving your legal status. Keeping track of it will help you stay compliant and organized as your organization grows.
Understanding corporate numbers, registration requirements, and ongoing compliance can be complex. Our charity lawyers at B.I.G. Charity Law Group help Ontario charities and nonprofits with:
Ready to get started or have questions about your OCN? Book a free consultation with our charity law team.
If you operate in Ontario, yes. Federally incorporated organisations must complete extra-provincial registration in Ontario, which results in receiving an OCN.
No. Your OCN is permanent and stays with your organisation for its entire existence. It doesn't change when you update your name, address, or other corporate information.
An OCN is your Ontario provincial corporation identifier (7 digits). A charity registration number is your CRA charitable tax-receipting identifier (9 digits + RR0001). You can have both.
Not directly. You need to be incorporated first (either provincially in Ontario or federally), which gives you an OCN or federal corporation number. Then you can apply to CRA for charitable status.
If you incorporate online through the Ontario Business Registry, you typically receive your OCN immediately or within 1-2 business days. Paper applications can take 2-4 weeks.
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