- You need to register a business name under the Business Names Act only if you plan to operate under a name other than your own exact legal name.
- - It does not create a separate legal entity.
- Choose your business name and consider a preliminary search for conflicts, even though a full clearance search isn't mandatory for a sole proprietorship.
Starting out as a sole proprietor is often the simplest way to begin operating a business in Ontario. If you're trying to figure out how to register a sole proprietorship the right way, the first thing to understand is what registration actually covers — and it isn't creating the business itself.
A sole proprietorship exists the moment you start operating a business on your own. What you register, if anything, is the name you operate it under.
Do You Even Need to Register?
You need to register a business name under the Business Names Act only if you plan to operate under a name other than your own exact legal name. If you're simply doing business as "Jane Smith," no registration is required. If you want to operate as "Jane Smith Consulting," you do.
What Registration Does (and Doesn't Do)
- It does not create a separate legal entity. You personally remain the business, with unlimited personal liability for its debts and obligations — registering a name changes none of that.
- It does not provide trademark protection. Clearing a business name registration doesn't guarantee no one else is using a similar name, and it isn't a substitute for trademark clearance.
- It does let you operate under the name. A registered name lets you legally invoice, sign contracts, and open a business bank account under that name rather than your own.
Steps to Register a Sole Proprietorship Business Name
- Choose your business name and consider a preliminary search for conflicts, even though a full clearance search isn't mandatory for a sole proprietorship.
- File your business name registration through the Ontario Business Registry, which can generally be done online.
- Pay the registration fee. As of mid-2026, this is $60 for a 5-year term — verify the current fee before you file, since government fees change.
- Receive your Master Business Licence, the document confirming your registration, which banks and some suppliers will ask to see.
- Renew before the term expires. The 5-year registration needs to be renewed to keep the name active.
Before You File: A Quick Checklist
- [ ] Decided on a business name that isn't simply your own personal legal name
- [ ] Checked that the name doesn't obviously conflict with another registered business or corporation
- [ ] Considered when you might need to register for GST/HST as revenue grows
- [ ] Weighed whether a corporation, rather than a sole proprietorship, better fits your liability and tax situation
- [ ] Kept your Master Business Licence somewhere accessible for banking and supplier paperwork
Sole Proprietorship vs. Other Structures at a Glance
| Sole Proprietorship | General Partnership | Corporation | |
|---|---|---|---|
| Formed by | Simply operating (name registration only if using a trade name) | The partners' factual relationship (name registration only if using a trade name) | Filing articles of incorporation |
| Personal liability | Unlimited | Unlimited, shared among partners | Generally limited, with exceptions such as personal guarantees |
| Number of owners | One | Two or more | One or more shareholders |
| Ongoing formalities | Minimal | Minimal, unless a partnership agreement is in place | Corporate records, filings, and governance obligations |
Frequently asked questions
Is a sole proprietorship the same as a registered business name?
Not quite. The sole proprietorship is how you're operating — alone, personally. Registering a business name is the separate step of legally claiming a trade name, needed only if you want to operate under something other than your own legal name.
Does registering give me any liability protection?
No. A sole proprietorship offers no separation between you and the business. Your personal assets remain exposed to the business's debts and liabilities, registered name or not.
Can I later convert my sole proprietorship into a corporation?
Yes, this is common as a business grows. It involves incorporating a new corporation and transferring the business into it, which has its own legal and tax steps worth planning with a lawyer and an accountant.
What happens if I don't renew my business name registration?
If it lapses, you lose the active registration for that name, which can affect your ability to show you're operating lawfully under it. Renew before the term ends to avoid a gap.
Can I hire employees as a sole proprietor?
Yes. Operating as a sole proprietor doesn't limit your ability to hire staff. You take on the same core employer obligations — payroll deductions, workplace injury insurance registration, and Employment Standards Act obligations — as any other employer.
This is a corporate question
Start a file online — flat, published fees, reviewed by a licensed Ontario lawyer before a dollar is owed.