Need to keep your business name active? In Ontario, a registered business name (sole proprietorship, partnership or trade name) is valid for five years and you must renew your Ontario business name before it expires. A free Ontario business name lookup on the Ontario Business Registry lets you check any name in minutes. Here is how both tasks work.
How to do an Ontario business name lookup
Before you register a new name, or if you simply want to confirm your existing one, start with a search. The Ontario Business Registry is the province's official online system for registering, searching and filing, and it offers a public name and entity search.
A quick lookup helps you:
- Check availability. See whether a business name you want is already registered by someone else before you commit to it.
- Confirm your own record. Look up your registered business name to check the spelling, the status, and — importantly — the expiry date so you know when a renewal is due.
- Do a sanity check on a corporation. Confirm that a corporation exists and is active, which is useful when you are dealing with suppliers or partners.
A basic Ontario business name lookup is free and takes only a few minutes. More detailed products, such as a formal profile report or a certified copy, may carry a fee, but for a simple availability or status check the free search is all you need. If you are still choosing a corporate name, our guide to the NUANS name search explains the deeper, formal search a named corporation requires.
One thing to understand about a name lookup: it tells you whether a name is registered, but it does not by itself grant you any rights to that name. A business-name registration lets you legally operate under a name; it does not stop a similar name from existing, and it is not the same as a trademark. So use the lookup to rule out obvious clashes and to confirm your own record, and treat trademark protection as a separate step if your brand is valuable.
The five-year rule: how to renew your Ontario business name
A registered business name in Ontario is not permanent. When you register a sole proprietorship, a partnership, or a trade name, that registration is valid for five years from the date you register it. Before the end of that period you have to renew your Ontario business name, or the registration lapses.
The renewal itself is straightforward:
- File in the Ontario Business Registry. Renewals are handled online in the same registry you used to register. You will need your account and your business identifiers to sign in and file.
- Watch your window. The registry generally lets you renew starting a few months before your expiry date. Do not wait until the last day.
- Pay the fee. A business name registration and its renewal carry a fee in the range of about $60. Because amounts can change, confirm the current fee in the registry before you file rather than assuming a fixed figure.
The single most useful habit is to note your expiry date the moment you register, then set a reminder several months ahead. A lapsed name is far more work to fix than a renewal filed on time.
What happens if your business name expires
If you renew inside the allowed window, nothing changes — your registration simply continues for another five years and your business identification number stays the same.
If you miss the window and the registration stays expired for too long, you generally cannot renew it anymore. At that point the name is treated as no longer registered, and to keep using it you have to register it again from scratch as a brand-new registration. That creates a new business identification number, and it can cause friction with banks, the CRA, and anyone who has your old details on file. It is entirely avoidable — renewing on time keeps your original record and number intact.
There is also a quieter risk in letting a name lapse: while your registration is expired, someone else could register the same or a similar name. You do not automatically get it back just because you used it first. That is one more reason to run a periodic Ontario business name lookup on your own record, note the expiry date, and file the renewal well before the deadline rather than scrambling afterward.
Registered business name vs. corporation
A common point of confusion is whether a corporation has to renew its name every five years. It does not, and the difference matters.
- A registered business name — a sole proprietorship, a partnership, or a trade name used by a business — is what expires on the five-year cycle described above and must be renewed.
- A corporation is a separate legal entity, and its corporate name does not expire on that same five-year schedule. Instead, a corporation must file an annual return to stay in good standing. Skipping annual returns creates its own compliance problems, but it is a different obligation from renewing a registered name.
One nuance to keep in mind: if a corporation also trades under a separate name — an operating or trade name that is not its full legal corporate name — that trade name is itself a registered business name and does follow the five-year renewal rule. So a single company can have both a corporate annual return and a business-name renewal to track.
| Task | Where you do it | Cost / frequency |
|---|---|---|
| Business name lookup / search | Ontario Business Registry (public search) | Free basic search, any time |
| Register a business name | Ontario Business Registry | Fee around $60, valid five years |
| Renew a registered business name | Ontario Business Registry | Fee around $60, every five years |
| Corporation annual return | Ontario Business Registry | Filed yearly to stay in good standing |
Let Markham Office handle the lookup and the renewal
Searching a name is quick; remembering to renew five years later, filing in the right place, and knowing whether you owe a name renewal or a corporate annual return is where busy owners slip. Markham Office helps you register, search, and stay compliant so a name you worked hard to build does not quietly lapse.
Want a hand? Start with our business registration service — whether you are registering a brand-new name, renewing an existing one, or sorting out a corporation, we will point you to the right filing and keep your record in good standing. If you are just getting started, read how to register a business in Ontario first, then let us handle the paperwork with you.