Ontario is Canada's largest province and the highest-volume jurisdiction for sole proprietorship registrations. If you want to operate a business under a name other than your own legal name in Ontario — for example, "Jane's Catering" instead of "Jane Smith" — you are required by provincial law to register that business name. This guide explains exactly how to register a sole proprietorship in Ontario in 2026.
What Is an Ontario Master Business Licence?
When you register a business name in Ontario, you receive a Master Business Licence (MBL). This is the official document issued by ServiceOntario confirming that your business name is registered in the province. It is valid for 5 years and must be renewed before expiry to keep your registration active.
The MBL is not a licence to operate a business — it does not grant any special permission or regulatory approval. It is simply a name registration document. Depending on your industry, you may also need separate licences or permits (e.g., food handling, electrical, etc.).
Do You Need to Register?
Under Ontario's Business Names Act, you must register your business name if:
- You operate under any name other than your exact legal name (e.g., "Smith Consulting" instead of "John Smith")
- You are a sole proprietor or partnership using a business name
If you operate solely under your own full legal name (e.g., you freelance as "John Smith" without any other business name), you do not need to register — though many freelancers register anyway for professional appearance and bank account purposes.
How to Register a Sole Proprietorship in Ontario: Step-by-Step
Step 1 — Search Existing Business Names
Before registering, search the Ontario Business Registry (ontario.ca/businessregistry) to check if your proposed name is already in use. Ontario does not guarantee exclusive name rights for sole proprietorships — two businesses can have similar names — but it's wise to choose a distinctive name to avoid confusion and potential passing-off claims.
Step 2 — Create a ServiceOntario Account
Go to ontario.ca/businessregistry and create an account (or log in with an existing Ontario.ca account). You'll need to verify your identity.
Step 3 — File a Business Name Registration
Select "Register a Business Name" and complete the form with:
- Your proposed business name
- Type of business (sole proprietorship)
- Business address in Ontario
- Description of your main business activity
- Your personal information as the owner
The government fee is $60 CAD for a 5-year registration (as of 2026). Payment is by credit card online.
Step 4 — Receive Your Master Business Licence
After successful payment and submission, ServiceOntario immediately issues your MBL digitally. You can download and print it from your Ontario Business Registry account. The MBL includes your Ontario Business Identification Number (BIN), your registered business name, and the expiry date 5 years from registration.
Step 5 — Complete Post-Registration Setup
With your MBL in hand, you can now:
- Open a business bank account (most banks require the MBL)
- Apply for a CRA Business Number (needed for GST/HST registration or if you have employees)
- Register for HST with CRA if your revenues will exceed $30,000
- Apply for any industry-specific licences or permits
Ontario Sole Proprietorship Costs (2026)
| Item | Cost |
|---|---|
| Ontario government registration fee | $60 CAD (5-year registration) |
| SimplyfyBiz service fee | $49 CAD |
| CRA Business Number | Free |
| HST registration | Free (mandatory once revenues exceed $30,000) |
| Renewal (every 5 years) | $60 CAD |
All government fees listed are approximate and subject to change without notice. Always verify the current fee directly with ServiceOntario before filing. These fees are separate from SimplyfyBiz service fees. See our pricing →
Numbered vs Named Sole Proprietorship
In Ontario, sole proprietorships always register under a specific name — you cannot register a "numbered" sole proprietorship the way corporations can. Your business name must be a distinct name, not just a number. Choose something memorable, professional, and different enough from existing Ontario businesses to avoid confusion.
Renewing Your Master Business Licence
Ontario MBLs are valid for 5 years. ServiceOntario will send a renewal notice approximately 90 days before expiry. The renewal fee is the same as the initial registration ($60 CAD). Renew through the Ontario Business Registry online portal.
If your MBL expires without renewal, your business name registration lapses. You can re-register under the same name if it's still available, but there is no grace period — once lapsed, the name is available to others.
Sole Proprietorship vs Incorporation: What's Right for You?
A sole proprietorship is faster and cheaper to set up, but it provides no liability protection — your personal assets (home, savings, vehicle) are at risk from business debts or lawsuits. Incorporation creates a separate legal entity that protects your personal assets and can offer tax advantages once your business earns more than approximately $50,000/year.
See our full comparison: Sole Proprietorship vs Incorporation.
Frequently Asked Questions
Do I need a Master Business Licence to freelance in Ontario?
If you freelance under your own legal name, you do not need an MBL. If you operate under a business name (even something like "John Smith Design" when your legal name is "John Smith" — the addition of "Design" makes it a different name), you should register. Many freelancers register to appear more professional and to open a business bank account.
Can I register my Ontario sole proprietorship online?
Yes. ServiceOntario's online business registry at ontario.ca/businessregistry handles all name registrations, renewals, and amendments online. SimplyfyBiz can also file on your behalf — learn more about our sole proprietorship service →
How long does Ontario sole proprietorship registration take?
Online registration through the Ontario Business Registry is processed immediately — your MBL is available for download within minutes of completing the form and paying the $60 CAD fee. SimplyfyBiz processes most Ontario sole proprietorship registrations the same business day.
What happens when my sole proprietorship business name expires?
After the 5-year registration period, your business name registration lapses. You can renew for another 5 years for $60 CAD. If you fail to renew, someone else can register your business name. ServiceOntario sends reminders before expiry — make sure your contact information in the registry is current.