- " - For a sole proprietor, it’s your own personal legal name.
- A trade name — sometimes called an operating name, or a business operating "as" something — is any name a business uses publicly that isn’t its exact legal name.
- Under the Business Names Act, any business name other than an individual’s own exact legal name, a partnership’s own name, or a corporation’s own exact legal name must be registered…
A lot of Ontario businesses operate under a name that isn’t the one on their incorporation documents — a bakery incorporated as a numbered company but branded as something else entirely, or a sole proprietor doing business under a catchy name instead of their own. That gap between the name on paper and the name on the sign is exactly what trade name registration exists to address.
What a Legal Name Is
Your legal name is the name that actually appears on your formal registration:
- For a corporation, it’s the name, or number, on your Articles of Incorporation — "Maple Ridge Holdings Inc." or "1234567 Ontario Inc."
- For a sole proprietor, it’s your own personal legal name.
- For a general partnership, it’s the partners’ own legal names together.
This is the name that appears on contracts, tax filings, and anything that has to legally bind the business.
What a Trade Name Is
A trade name — sometimes called an operating name, or a business operating "as" something — is any name a business uses publicly that isn’t its exact legal name. If "1234567 Ontario Inc." brands and advertises itself as "Riverside Coffee Roasters," that’s a trade name. If a sole proprietor operates as "Riverside Design Studio" instead of just their own name, that’s a trade name too.
The Rule: Register Before You Use It
Under the Business Names Act, any business name other than an individual’s own exact legal name, a partnership’s own name, or a corporation’s own exact legal name must be registered before the business carries on business under it. This applies whether you’re a sole proprietor, a partnership, or a corporation operating under a name different from the one on its incorporation documents.
Registration is a relatively simple filing — as of mid-2026, the fee for an Ontario business name registration is $60 for a five-year term (verify the current amount before you file) — but skipping it isn’t just a technicality: operating under an unregistered name you’re required to register puts you offside the Business Names Act.
Trade Name Registration Is Not Incorporation
This is one of the most commonly confused points in small-business law, so it’s worth stating plainly: registering a trade name does not incorporate anything. A sole proprietor or partnership that registers a trade name still has no separate legal entity and no personal-liability protection — they’re simply now legally permitted to operate publicly under that name. If personal liability protection is what you’re actually after, that requires incorporating, not registering a trade name.
Legal Name vs. Trade Name at a Glance
| Legal Name | Trade Name | |
|---|---|---|
| What it is | The name on your incorporation, or your own name | A public-facing name different from the legal name |
| Creates a separate legal entity? | Yes, if it’s a corporation’s legal name | No |
| Registration required? | Incorporation itself is the registration | Yes, under the Business Names Act, before use |
| Where it’s used | Contracts, tax filings, legal documents | Marketing, signage, invoices, day-to-day branding |
| Term | Indefinite, until changed or dissolved | Currently a five-year registration, renewable |
| Provides liability protection? | Only if it’s a corporation | No, on its own |
When You Need Both
Plenty of Ontario businesses legitimately need both a legal name and a registered trade name at once — for example, a corporation incorporated under a formal legal name that wants to brand and advertise under something more marketable. In that case, the corporation is the legal entity, and the trade name registration is layered on top to let it lawfully operate under the public-facing brand.
A Practical Checklist
- [ ] Confirm whether the name you’re using publicly matches your exact legal name — personal, partnership, or corporate
- [ ] If it doesn’t match, register it as a business name under the Business Names Act before you use it publicly
- [ ] Keep track of the registration’s term and renew it before it lapses
- [ ] Remember that registering a trade name alone does not create a corporation or provide liability protection
Frequently asked questions
If my corporation’s legal name is a number, do I need a trade name to have a real brand?
Yes, typically — a numbered company like "1234567 Ontario Inc." can register a trade name to operate publicly under a more marketable brand, while the number stays its formal legal name on contracts and filings.
Does registering a trade name protect that name from being used by someone else?
Not in the way a trademark does. Business name registration mainly satisfies the legal requirement to register before use — it isn’t the same system as trademark protection, and it doesn’t stop someone else from using a confusingly similar name in a different registration.
Can a sole proprietor operate under a trade name forever without incorporating?
Yes — registering a trade name and incorporating are separate decisions. A sole proprietor can operate indefinitely under a registered trade name without ever incorporating, though they’ll still have no personal-liability protection either way.
What happens if I use an unregistered trade name by mistake?
You’re generally expected to register it before continuing to use it publicly. Speak with a lawyer if you’ve been operating under an unregistered name for a while, since it’s worth confirming there’s no bigger issue to clean up alongside it.
This is a corporate question
Start a file online — flat, published fees, reviewed by a licensed Ontario lawyer before a dollar is owed.