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Corporate

What are all the different business structures available in Ontario?

TSL Written by the Treadstone Law team· Updated June 2026

Ontario entrepreneurs can choose from several structures, each with different liability, tax, and governance characteristics.

A sole proprietorship is the default for a single owner — simple, inexpensive, no separate legal entity, unlimited personal liability. A general partnership arises when two or more people carry on business together; all general partners share unlimited personal liability. A limited partnership has at least one general partner (unlimited liability) and one or more limited partners who risk only their investment, provided they do not actively manage the business. A limited liability partnership (LLP) is available only to certain regulated professions such as lawyers and accountants, and limits inter-partner liability for the negligence of co-partners.

A corporation — whether incorporated provincially under the OBCA or federally under the CBCA — is a separate legal entity. Shareholders have limited liability. Corporations can be for-profit or not-for-profit. A not-for-profit corporation under the Ontario Not-for-Profit Corporations Act, 2010 or federally under the Canada Not-for-profit Corporations Act is used for clubs, charities, and community organizations.

There are also co-operative corporations under Ontario's Co-operative Corporations Act for member-owned businesses. Most commercial enterprises choose between a sole proprietorship, general partnership, or for-profit corporation.

Key takeaways

  • Ontario offers sole proprietorships, partnerships (general, limited, LLP), corporations, and co-operatives.
  • Liability protection varies: sole props and general partners face unlimited liability; corporations provide a shield.
  • LLPs are limited to regulated professions in Ontario.
  • Most businesses choose between sole prop, general partnership, or corporation depending on size and risk.
This is general information, not legal advice. It doesn’t create a lawyer–client relationship, and the rules can change. For advice on your situation, a Treadstone corporate lawyer can help.
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