Is the OCN Number & BN Number the Same in Ontario?

ByLaura Harvey
comparing OCN and BN numbers for your corporation

When registering or managing a business in Ontario, you’re likely to come across a few different identification numbers—most commonly the Ontario Corporation Number (OCN) and the Business Number (BN). While they might seem similar, they serve very different purposes and come from different levels of government. Understanding the difference can help you avoid delays with your banking, tax accounts, and government filings.

What is an OCN Number?

  • Stands for Ontario Corporation Number
  • Issued by the Province of Ontario
  • Assigned automatically when you incorporate a business provincially
  • This number is used in filings with the Ontario Business Registry, including renewals, amendments, and annual returns
  • It is typically a 7-digit number
  • Used for identification within Ontario only

The OCN number never changes. If you file any updates to your corporation—such as:

  • A corporate name change
  • A Notice of Change (officer or address updates)
  • Your annual return
  • Or add a trade name under the corporation

The OCN number remains the same throughout the lifetime of your corporation. It is the consistent, permanent identifier for your Ontario corporation.

Search BN Number Registration

What Is a BN Number?

  • Stands for Business Number
  • Issued by the Canada Revenue Agency (CRA)
  • A 9-digit number that identifies your business with the federal government
  • Required to set up tax accounts such as:
    • GST/HST
    • Payroll
    • Import/export
    • Corporate income tax (T2)

You can have one BN number and multiple program accounts (like GST/HST and Payroll) under that number.

Are the OCN & BN the Same?

No—they are not the same number, and they are issued by different authorities:

  • OCN = Provincial identifier (Ontario)
  • BN = Federal identifier (CRA)

You may need both when operating a business in Ontario, depending on the type of entity and the tax programs you’re registered for.

When Will You Need Each Number?

You might be asked for your:

  • OCN: When filing changes to your corporation or submitting an annual return.
  • BN: When registering for taxes, opening a business bank account, or dealing with the CRA.

Some applications or platforms (like QuickBooks or government portals) will specifically ask for one or the other—so it’s important to know which number to provide.

We Can Help You Get Both

At Ontario Business Central, we help entrepreneurs and business owners register and manage their businesses with ease. Whether you’re incorporating a new company, updating your registration, or need help obtaining your BN from the CRA, we’re here to assist.

With over 30 years of experience and direct access to the Ontario Business Registry, we simplify the process so you can focus on building your business.

inquiries@ontariobusinesscentral.ca
Toll-Free: 1-800-280-1913
Local: 1-416-599-9009
Fax: 1-866-294-4363
Office Hours: 9:00am – 5:00pm
Monday – Friday E.S.T.

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.

Laura Harvey
Laura Harvey

Laura Harvey stands as a beacon of entrepreneurial support and expertise, embodying the spirit and drive of the community she serves. As the proud owner of Ontario Business Central Inc., Laura's journey is one of dedication, passion, and an unwavering commitment to nurturing the entrepreneurial landscape in Canada.

With over three decades of experience as a corporate specialist coupled with over 25 years of entrepreneurial ventures, Laura brings a wealth of knowledge and insight to her role. Her expertise is not just theoretical; it's built on the real-life challenges and triumphs of navigating the business world. This unique blend of professional and personal experience positions Laura as a relatable and trusted guide for those embarking on their entrepreneurial journey.

Beyond her role at Ontario Business Central, Laura has extended her outreach through the innovative YouTube series "Taking the Leap." This platform allows her to connect with new business owners, offering them a stage to share their stories and insights. "Taking the Leap" is more than just a series; it's a community where aspiring entrepreneurs can find inspiration, learn from the experiences of others, and gain practical advice on crucial corporate tasks like registering a business, updating business information, understanding tax account intricacies, and much more.

Laura's contributions extend into the digital world through her in-depth blogs for Ontario Business Central. Here, she delves into topics essential for entrepreneurs and business owners looking to start, manage, and grow their ventures. Her writing is a reflection of her passion for supporting entrepreneurial advancement and a testament to her deep understanding of the corporate sphere.

Laura Harvey is not just an entrepreneur; she's a mentor, guide, and fellow traveler on the path of business ownership. She embodies the ethos of "walking the walk," providing both the tools and the encouragement for others to thrive in their entrepreneurial endeavors. Whether through her written words, her YouTube series, or her hands-on approach at Ontario Business Central Inc., Laura is dedicated to uplifting and assisting new and established business owners alike.

You can follow her on social media channels and professional profiles:

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Taking The Leap YouTube Series