Business Structures in Ontario: 2026 Guide

Choosing a business structure in Ontario shapes your liability, taxes and paperwork for years. The province recognizes four main structures, but the registry accepts several more filing types. Here is what each one costs, what it protects and how it is taxed.

What are the main business structures in Ontario?

Ontario officially frames the decision around four structures: the sole proprietorship, the partnership, the corporation and the co-operative. That is the framing used on ontario.ca.

In practice the registry accepts more filing types. Limited partnerships, limited liability partnerships and not-for-profit corporations are each separate filings with their own forms and fees. So there are four families, and some of them contain sub-forms that behave very differently.

A co-operative is controlled by its members, one member one vote regardless of capital contributed, and it can be for profit or not for profit. If your goal is mission-driven rather than member-owned, see our guide to the not-for-profit organization in Ontario, a different filing entirely.

How much does each structure cost to set up?

Government fees are modest, and incorporating costs only a few hundred dollars more than registering a business name. Processing time is often the bigger difference.

A corporation formed outside Canada needs an extra-provincial licence, about $330. After year one, an Ontario annual return costs $0 while a federal corporation pays $12, and business name registrations expire after five years unless renewed. Before paying, settle on a name that will clear: how to choose your corporation name in Ontario covers the traps that get filings rejected.

Ontario government fees and tax rates shown are those in effect as of July 2026 and can change.

Which structures put your personal assets at risk?

In a sole proprietorship, the owner and the business are the same legal person. If the business cannot pay a debt or a judgment, creditors can pursue personal assets: savings, a vehicle, home equity.

A general partnership multiplies that exposure. Under Ontario's Partnerships Act, every partner is liable jointly with the other partners for all debts and obligations incurred while a partner, and liability for wrongs is joint and several, so a mistake by your partner lands on you personally. A written partnership agreement is strongly advisable: it governs how partners share profits, responsibilities and exits. See corporation vs general partnership.

A limited partnership splits the risk: general partners manage and carry unlimited liability, limited partners are passive investors whose exposure is capped at their contribution.

A limited liability partnership is narrower than most expect. It is available only for practising a profession governed by an Act that expressly permits it, with mandatory liability insurance, which in Ontario means lawyers and paralegals, and Chartered Professional Accountants. The shield is partial: a partner is not liable for the negligent or wrongful acts of another partner or of employees not under their supervision, but stays liable for their own acts and those of people under their direct supervision. It also does not protect their interest in partnership property.

A corporation is a separate legal entity that owns its assets and carries its debts, so shareholder liability is limited to the amount invested. That is the main reason founders incorporate, though directors carry statutory duties and lenders often ask for guarantees.

How is each structure taxed?

Unincorporated structures are taxed in your hands. A sole proprietor reports business income on their personal return using form T2125 and pays personal graduated rates on it, whether the money stays in the business account or not. A partnership is not a taxpayer at all: it computes its income, allocates it to the partners, and each partner reports their share on their own return and pays tax at their own personal rate.

A corporation is different because it files its own T2 return and pays corporate rates on income it keeps. The Ontario general corporate rate is 11.5 percent, which gives a combined federal and Ontario general rate of about 26.5 percent. For a Canadian-controlled private corporation, the Ontario small business rate dropped from 3.2 percent to 2.2 percent effective July 1, 2026, giving a combined rate of about 11.2 percent on the first $500,000 of active business income. Rates are prorated for tax years that straddle July 1, 2026.

The practical consequence is deferral. If you earn more than you need to withdraw personally, leaving the surplus in a corporation taxed at about 11.2 percent rather than a top personal rate frees up cash to reinvest in the business. If you draw everything out as salary or dividends, that advantage largely disappears.

HST applies regardless of structure. The rate in Ontario is 13 percent, and registration becomes mandatory once taxable revenue passes $30,000 over four consecutive calendar quarters or in a single quarter. Below that threshold you can register voluntarily, which lets you claim input tax credits on your business purchases.

Ontario or federal incorporation?

If you incorporate, you still choose between the Ontario Business Corporations Act and the federal Canada Business Corporations Act. The differences are smaller than they used to be, but two are decisive.

The residency rule often decides it. Ontario removed the Canadian residency requirement for directors on July 5, 2021, so a board of non-residents can run an Ontario corporation. Federally you still need 25 percent resident Canadian directors, at least one when the board has fewer than four members. Going federal buys Canada-wide name protection and a lower fee, at the cost of the $12 annual return and the free Ontario initial return due within 60 days of starting to carry on business here.

Which structure should you choose?

Register a sole proprietorship when you are solo, your liability exposure is low and your revenue is modest. It is the cheapest and fastest way to start, and you can incorporate later.

Choose a general partnership only with someone you trust and only with a written agreement in place first. Without one, the default rules of the Partnerships Act apply, and joint liability is unforgiving.

Incorporate when your liability exposure is real, when your profits exceed what you need to draw personally so the corporate rate creates a genuine deferral, or when you are bringing in partners or investors who need shares. You can compare packages and turnaround on our pricing page.

FAQ about business structures in Ontario

What are the four types of business structures in Ontario?

Ontario officially recognizes the sole proprietorship, the partnership, the corporation and the co-operative. The registry also accepts related filing types, including limited partnerships, limited liability partnerships and not-for-profit corporations under ONCA, each with its own form, fee and eligibility rules.

Can I run a business without registering in Ontario?

Sometimes. A sole proprietor operating under their own exact legal name generally does not need to register a business name. The moment you operate under any other name, or form a partnership or corporation, registration is required. Sector licences and HST registration are separate obligations.

Do I need to incorporate to hire employees?

No. A sole proprietor or partnership can hire employees, open a payroll account with the CRA and remit source deductions like any employer. Incorporation changes your liability and tax treatment, not your right to hire. Many founders incorporate around the same time because payroll signals real exposure.

What is the most popular business structure?

The sole proprietorship is the most common starting point in Ontario because it costs about $60, registers immediately online and needs no separate tax return. Corporations dominate once revenue, liability or outside investment enter the picture, since they offer limited liability and access to the small business rate.

Do I have to charge HST right away?

Not necessarily. Registration becomes mandatory once your taxable revenue passes $30,000 over four consecutive calendar quarters or in a single quarter. Below that you can register voluntarily, charge the 13 percent HST and claim input tax credits on your purchases, which often pays off if you have significant start-up costs.

Ready to choose your structure?

If the answer points to a corporation, you can complete your incorporation online with Lexstart in minutes, in English or French. Still weighing a proprietorship against a corporation? Contact our team and we will walk you through it.

For official references, see Ontario's guides on deciding on the ownership structure for your business and on the cost and time required to register a business name or corporation.