How to register a business in Ontario: the order that actually works
Most people do these steps in the wrong order and end up re-doing paperwork. Here is the sequence that avoids that, with the official link for every step.
General information for Ontario business owners, current as of August 14, 2026. Rules, rates and thresholds change and your own facts matter — this is not legal, tax, accounting or financial advice, and reading it does not create a professional relationship. Verify against the official sources listed at the end and speak to a licensed professional before you act.
Registering a business in Ontario is not one form — it is a short chain of registrations where each one asks for a number from the previous one. Do them out of order and you will be sent back to the start. This is the sequence, plus what each step is actually for.
Step 1 — Decide sole proprietorship or corporation first
This is the only decision that is expensive to reverse, so make it before you register anything. A sole proprietorship is simplest: you and the business are the same legal person, and business income goes on your personal tax return. A corporation is a separate legal entity, which changes how you are taxed and how liability sits — and it comes with ongoing filing obligations. Which one suits you depends on your risk, your income and your plans, so this is a conversation for an accountant or lawyer, not a blog post.
Step 2 — Register your business name with Ontario
If you operate under anything other than your own legal name, the name has to be registered through Ontario's Business Registry. Registration lasts five years and then needs renewal. Ontario does not check whether your name conflicts with someone else's trademark — that part is on you, so search the Canadian trademarks database before you print signage.
Step 3 — Get your Business Number (BN) from the CRA
The BN is the nine-digit identifier that every federal program account hangs off: HST, payroll, corporate income tax, import/export. Get it once, then add program accounts to it as you need them. Corporations registered federally or in Ontario are often assigned a BN automatically — check before you request a second one.
Step 4 — Decide whether to register for HST now or later
You must register for GST/HST once you stop being a small supplier — broadly, once your worldwide taxable revenues pass $30,000 across four consecutive calendar quarters. Below that you may register voluntarily, which lets you claim input tax credits on what you buy but also means charging HST from day one. In Ontario the HST rate is 13%. Look at what you buy, who your customers are and whether your prices can absorb tax before you choose.
Step 5 — Payroll and WSIB, before your first hire starts
The moment you pay someone, you need a payroll program account on your BN so you can remit CPP, EI and income tax, and you need to know whether your business is required to register with the WSIB. Most Ontario businesses that employ workers are mandatory; some sectors are not, and some owners register voluntarily for their own coverage. Check your classification rather than assuming.
Step 6 — Municipal licences, zoning and the sector-specific layer
Provincial registration does not give you permission to operate. Your city controls zoning and business licensing, and your sector may add its own: a public health inspection for food, a trade certification for skilled trades, a licence for personal services. BizPaL is the quickest way to see the whole list for your address and activity.
Step 7 — The documents that make it survivable
- A written record of what you registered, when, and which account each number belongs to.
- Employment Standards Act-compliant offer letters and a written policy set before your first hire.
- An AODA accessibility plan if you have employees, and a health and safety policy under the OHSA.
- A bookkeeping rhythm — weekly reconciliation beats a heroic March.
None of this is difficult individually. What overwhelms people is that nobody hands them the list. That is the entire reason SUCH A SOFTY exists: the 30-day launch checklist in the free kit walks this chain in order, with the official source beside each step.
Official sources
- Ontario Business Registry
- CRA — Business Number and program accounts
- CRA — When to register for GST/HST
- WSIB — Do I need coverage?
- BizPaL — permits and licences
Rules, rates and thresholds change. Confirm against the source before you act, and speak to a lawyer or accountant about your own situation — this guide is educational and is not legal, tax or financial advice.