You register a trade name in Ontario through the Ontario Business Registry (OBR) or through Biz Ontario by searching for name conflicts, then submitting your legal name, business address, and NAICS activity code online, and paying the $60 government filing fee. Your Master Business Licence (MBL) is issued almost instantly and stays valid for five years. Before you get to that filing screen, though, most new business owners in Ontario make at least one of the ten naming mistakes below – and several of them cost far more to fix than the registration itself.
Why the Name Comes Before the Filing
A trade name in Ontario (also called a business name or “operating name”) is different from your legal name. If you’re a sole proprietor working under your own full name – say, “Maria Costa” – you don’t need to register anything. The moment you add a single word to it, like “Maria Costa Bookkeeping,” Ontario’s Business Names Act requires registration.
Corporations face the same rule in reverse. A numbered company like “12345678 Ontario Inc.” can register a trade name in Ontario so it can market itself as “Northgate Roofing” without changing its legal structure. Getting the name wrong before you file is the expensive part – the registration itself is fast and cheap.
The 10 Mistakes New Ontario Business Owners Make When Choosing a Business Name
1. Assuming a Google Search Is the Same as a Legal Search
A quick web search shows you active websites and social media pages. It shows you nothing about inactive corporations, registered trademarks, or businesses that exist in provincial databases but haven’t built a website yet. For a real check, you need a search of the Ontario Business Registry and, for incorporations, a NUANS report – the federally recognized name-comparison system used across Canada.
2. Confusing “Registered” With “Protected”
This is the single most common misunderstanding. Registering a trade name tells the Ontario government who is operating under that name — it does not give you exclusive rights to it the way a trademark does. If a business two provinces over is already using an identical name, your Ontario registration won’t stop them, and a registered trademark holder can still challenge you even after you’ve filed.
3. Picking a Name That’s “Too Similar” to an Existing One
The Business Names Act allows the Ministry to reject or later cancel a name that could reasonably confuse the public with an existing registrant. New owners often assume “close enough is fine” because their name isn’t identical. In practice, similarity in sound, spelling, or industry is enough to trigger a rejection or a costly dispute down the line.
4. Forgetting the NAICS Code Actually Matters
When you register, you’ll select a North American Industry Classification System (NAICS) code describing your primary business activity. Owners often pick the closest-sounding option without checking it against what they actually do. An inaccurate code can create friction later with licensing bodies, insurers, or lenders who cross-reference your registered activity against your operations.
5. Registering the Name Before Checking Domain and Social Availability
A name can pass every Ontario Business Registry check and still be unusable in practice if the matching domain and social handles are already taken by an unrelated brand. Check the domain and handle availability before you pay the filing fee – changing a registered trade name later means cancelling the old registration and filing (and paying for) a new one.
6. Not Knowing the Difference Between a BIN and a BN
Registering your business name gives you a 9-digit Business Identification Number (BIN) from ServiceOntario. That is not the same as your Business Number (BN), which comes from the Canada Revenue Agency for tax accounts like HST, payroll, and corporate income tax. New owners frequently assume one number covers both – it doesn’t, and you’ll need both to operate fully.
7. Choosing a Numbered Company Name and Never Circling Back
Many founders incorporate an Ontario corporation quickly using a numbered name (e.g., “1234567 Ontario Inc.”) to skip the NUANS search and speed up incorporation. That’s a reasonable shortcut – but a surprising number never register the trade name they actually use in marketing, which leaves them operating under an unregistered “doing business as” name and exposed to Business Names Act penalties.
8. Ignoring the Five-Year Clock
An Ontario Master Business Licence is valid for exactly five years from the date of registration, not indefinitely. The Ontario government does not send you a renewal reminder – that responsibility sits entirely with you. Missing the deadline means your registration lapses, and you lose the legal right to operate under that name until you file again.
9. Using a Name That Implies a Structure You Don’t Have
Words like “Ltd.,” “Inc.,” “Corp.,” or “Professional Corporation” signal a specific legal structure to customers, banks, and regulators. A sole proprietor or partnership using one of these terms in a trade name without actually being incorporated can run into registration rejections and, in some cases, misrepresentation issues with clients or lenders.
10. Underestimating the Penalty for Skipping Registration
Some new owners decide the $60 fee and paperwork aren’t worth it and simply start operating. Under the Business Names Act, operating an unregistered business name in Ontario can carry fines of up to $2,000 for individuals and $25,000 for corporations – well beyond the cost of doing it right the first time. Most banks also won’t open a business account without proof of registration, so skipping this step blocks basic operations anyway.
How to Register a Trade Name in Ontario: Step-by-Step
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Search Your Business Name
Use the free Ontario Business Registry search to confirm your preferred business name is available. If you're incorporating, order a NUANS Report for additional name protection. -
Choose Your Business Structure
Decide whether you're registering as a:- Sole Proprietorship
- General Partnership
- Trade Name for an Existing Corporation
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Create Your Ontario Business Account
Sign in or create an Ontario.ca Account to submit your application online. -
Prepare Your Business Information
You'll need:- Legal names of all owners/partners/directors
- Residential addresses
- Ontario business address
- NAICS code for your primary business activity
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Submit Your Application & Pay the Fee
The current government filing fee is $60 for Sole Proprietorships, General Partnerships, and Trade Name registrations. Payment is accepted by debit or credit card and is non-refundable. -
Receive Your Master Business Licence (MBL)
Online applications are generally processed within minutes, while mail applications may take several weeks. -
Register for CRA Accounts
Your Master Business Licence does not automatically create your CRA Business Number, HST, Payroll, or Corporate Tax accounts. These must be registered separately with the Canada Revenue Agency. -
Remember Your Renewal Date
Trade Name registrations expire every 5 years. Ontario does not send renewal reminders, so be sure to mark your calendar.
Why Thousands of Businesses Choose Biz Ontario
The incorporation process can be complex and time-consuming, which is why many entrepreneurs choose to work with Biz Ontario. Our team simplifies the registration process by handling all required filings through one convenient service.
We assist with:
- Ontario & Federal Incorporations
- Sole Proprietorships
- Trade Name Registrations
- General Partnerships
- Professional Corporations
- Company Key Retrieval
- Annual Return Filings
- CRA Program Account Registrations
- Ongoing Business Compliance
Ontario Trade Name vs. Business Name vs. Company Name: What’s the Difference?
| Term | What it actually means | Legal protection | Typical filer |
|---|---|---|---|
| Trade name | The operating name a corporation uses instead of, or alongside, its legal corporate name | None beyond blocking identical Ontario registrations | Existing corporations adding a brand |
| Business name (Ontario) | Umbrella term covering sole proprietorships, partnerships, and corporate trade names registered under the Business Names Act | None beyond blocking identical Ontario registrations | Sole proprietors, partnerships, corporations |
| Company name | The full legal name on your Articles of Incorporation (e.g., "Smith & Associates Ltd.") | Protected within Ontario at incorporation via NUANS comparison; stronger than a trade name, still not a trademark | Corporations |
| Trademark | A federally registered mark protecting a brand name or logo nationally | Strongest protection; covers all of Canada, separate application through the Canadian Intellectual Property Office | Any business wanting national brand protection |
Ontario Trade Name Renewal: What You Need to Know
Your registration is valid for exactly five years from your original filing date. Renewal is done through the same Ontario Business Registry portal, and the fee matches the original registration fee. You’ll reconfirm that your business address, ownership details, and activity description are still accurate – if anything has changed, update it as part of the renewal rather than leaving stale information on the public record. Miss the renewal window, and your legal right to use that name lapses, even if you’ve been operating under it continuously.
A Practical Example
One pattern I see constantly with Ontario founders: they incorporate as a numbered company to save time and money, fully intending to register a trade name “later” once they’ve picked a final brand. Six months and a logo, website, and set of business cards later, “later” still hasn’t happened – and they’re technically operating under an unregistered name the whole time. If you’re going the numbered-company route, put a specific date on your calendar to file the trade name, not just a vague intention.
Frequently Asked Questions
Do I need to register a trade name if I use my own legal name in Ontario?
No. If you operate strictly under your own first and last name with nothing added, no registration is required. Adding any word - a descriptor, product line, or brand term - triggers the requirement to register under the Business Names Act.
How much does it cost to register a business name in Ontario?
The standard government fee is $60 for a sole proprietorship, general partnership, or corporate trade name registration. Limited Partnerships carry a $210 government fee. Third-party filing services may charge additional fees on top of the government amount.
Does registering a trade name in Ontario protect it across Canada?
No. Ontario trade name registration only prevents identical or confusingly similar registrations within Ontario. For protection across Canada, you need a federal trademark through the Canadian Intellectual Property Office.
What happens if I don't renew my Ontario trade name on time?
Your registration expires and you lose the legal right to operate under that name until you re-register. There's no grace period reminder from the province, so tracking your own five-year renewal date is essential.
Can I change my registered trade name later?
Not by editing the existing registration. You need to cancel the old registration and file a new trade name registration under the updated name, paying the applicable fee again.