If you run a business under a name other than your own legal name, Ontario may require a business name registration. This registration lets you use and identify a business name; it does not automatically create a corporation, give you trademark protection or register an HST account.
Start by identifying your legal business structure, then ask whether the public-facing name differs from the legal one.
Legal name versus operating name
A sole proprietor trading under 'Maple Street Design' is still an individual carrying on the business, but may need to register that business name. A corporation such as '1234567 Ontario Inc.' using the trade name 'Maple Street Design' may need an additional registration for that operating name.
A registered business name is not the same as a federally registered trademark. Similar names can create commercial risk even when a provincial filing is accepted.
What information do you need?
Typically you will identify the business structure, name, Ontario address and responsible individuals or corporation details. Use the Ontario Business Registry or an authorized service provider, and save the confirmation and registration number.
Check for conflicting names and domain use before spending money on signs, marketing and brand materials. The name registration process does not guarantee exclusivity.
How long does registration last?
Ontario business name registrations have renewal requirements; review the current Ontario Business Registry instructions and your own certificate for the exact renewal date and fees. Do not treat the initial filing as permanent.
Put a calendar reminder well before expiry, especially if the name appears on invoices, permits and your website.
Does registration give you a CRA BN?
Not always. Business-name registration, incorporation, CRA BN setup and GST/HST program registration are separate steps. Your business structure and activities determine which accounts are needed.
Example: a consultant can register an Ontario trade name while remaining a sole proprietor and below the small-supplier threshold. That filing alone does not authorize charging 13% HST.
What should your invoices show?
Make it easy for customers to identify who they contracted with. Use the trading name consistently and include the legal entity's details where appropriate, plus any tax registration number when required.
Keep the legal and operating names mapped in your accounting software so bank deposits and tax slips are not misidentified.
Sources and further reading
General educational content only. Verify current CRA and provincial guidance before acting.