How to Register a Business in Ontario: Complete Guide 2026
Ontario business filings are handled through the Ontario Business Registry, not by guessing forms or chasing old paper steps. Ontario says businesses with employees, facilities, or offices in Ontario must register using the Ontario Business Registry.
The process is not hard, but it is easy to do out of order. That is where most people lose time. They pick a name before checking their structure, open a bank account before sorting their CRA accounts, or assume registration and tax setup are the same thing. They are not. Ontario handles the business registration side, while the CRA handles the federal business number and tax program accounts such as GST/HST and payroll.
How to Start Ontario Business Registration the Right Way
The easiest way to handle service ontario business registration is to follow the process in the right order.
Step 1: Choose the right structure before you file
Your structure affects your registration path, tax setup, and ongoing filings. A sole proprietorship is the simplest option for many new owners. A general partnership can work when two or more people are running the business together. A corporation is more formal and comes with annual filing obligations. Ontario’s business start resources point founders to choose an ownership structure before moving into registration.
If you plan to incorporate with a custom business name in Ontario, Ontario says you need a Nuans report from a private name search company. If you would rather skip the custom-name step, Ontario also allows a numbered corporation option. That one choice can change how fast you get through the setup stage.
Step 2: Gather what you need before you start
This is where smooth registrations are won. Ontario says online registration requires a working email address and a valid debit or credit card. CRA registration pages also show that online business setup may require personal and business details such as the owner’s name, Social Insurance Number, date of birth, home postal code, legal and operating business names, physical and mailing addresses, business type, and a description of the main business activity.
You should also settle these details before you log in:
- your exact legal name and operating name
- your business address and mailing address
- your business activity description
- your ownership structure
- whether you will hire staff right away
- whether you expect to register for GST/HST soon
Step 3: Register through the Ontario Business Registry
Ontario’s current model is online first. The province’s business registration guidance points users to the Ontario Business Registry for registration and later management tasks. That matters because registration is only the beginning. The same system is also used to renew a business name registration, update company information, and for corporations, file an annual return.
A business name registration in Ontario is still often called a Master Business Licence, but Ontario notes that the formal term is Business Name Registration. Ontario also says that this registration expires every five years and must be renewed within the six months before expiry. If you register and then forget this later, your clean launch can turn into a messy admin problem.
Step 4: Set up CRA accounts after registration
This is the part many new owners miss. Ontario registration does not automatically mean every CRA account is open. The CRA says your business number, or BN, is a unique 9-digit identifier used when dealing with the CRA and other government programs. The CRA also says you only have one BN, and program accounts such as GST/HST or payroll get added onto that number.
The CRA changed its process recently. Effective November 3, 2025, the CRA no longer accepts new BN or program account registrations by phone. Resident businesses are directed to register online through Business Registration Online, and the CRA notes that Ontario residents can link from that CRA flow to the provincial registration site.
If you will have employees, you may need a payroll deductions account. CRA guidance says you must register for a payroll account before your first remittance due date, which is generally the 15th day of the month after the month in which you began withholding deductions from an employee’s pay. That date arrives faster than most new employers expect.
If you sell taxable goods or services, GST/HST may also matter early. The CRA says you generally must register once you exceed the $30,000 small supplier threshold, and small suppliers can also choose to register voluntarily. Once registered, you must charge and collect GST/HST on taxable supplies and file returns for each reporting period.
Step 5: Check licences, permits, and ongoing filings
Registration is not the same as permission to operate in every industry. Ontario points businesses to BizPaL, a free tool that filters licences and permits by location, industry, and business activity. This is especially useful for food, health, transport, trades, and regulated service businesses where municipal or sector-specific approvals may apply.
For corporations, ongoing compliance matters too. Ontario says the Ontario Business Registry is used to file an annual return for a corporation, and Ontario tax guidance notes that corporations with annual returns due after October 18, 2021 file those returns directly in the Ontario Business Registry. In other words, registration is your first admin step, not your last.
Common mistakes to avoid
The biggest mistake is treating registration like a one-click task. A better approach is to treat it as a sequence.
First, choose the right structure. Second, prepare your name and business details. Third, register in Ontario. Fourth, open the CRA accounts you actually need. Fifth, check for licences and future renewals. That order matches how Ontario and the CRA divide their responsibilities.
Another common mistake is mixing up business numbers. The CRA specifically says an Ontario Business Identification Number is not the same as a CRA business number. That small mix-up can waste time when opening program accounts.
Final thoughts
A clean Ontario launch starts with clarity. If you are searching for service ontario business registration, the practical answer is that you should complete your provincial filing through the Ontario Business Registry, then line up the CRA accounts your business actually needs. Do those two pieces in the right order, and the process feels far less confusing.
This guide is for general information. For legal, tax, or structure-specific advice, use official Ontario and CRA resources or speak with a qualified professional.
FAQs
Do I need to register a sole proprietorship in Ontario?
Ontario says you need to register your sole proprietorship if you are not using your own name as the business name.
Is ServiceOntario the same as the Ontario Business Registry?
Not exactly. ServiceOntario is the broader government service brand, while business registration transactions are completed through the Ontario Business Registry.
How long does an Ontario business name registration last?
Ontario says a Business Name Registration, formerly called a Master Business Licence, expires every five years and must be renewed within the six months before expiry.
Do I get a CRA business number when I register in Ontario?
You may still need to register with the CRA for the program accounts your business needs. The CRA says a BN is your unique 9-digit business identifier, and GST/HST or payroll accounts are added as program accounts to that BN.
When do I need to register for GST/HST?
The CRA says you generally must register when you exceed the $30,000 small supplier threshold, although small suppliers can also register voluntarily.
When do I need a payroll account?
If you are hiring employees and withholding deductions, the CRA says you must register for a payroll account before your first remittance due date, usually the 15th day of the following month.
