Partnership vs. Joint Venture in Ontario

“Partnership” and “joint venture” are often used loosely in everyday business conversation, as if they mean roughly the same thing. In Ontario law, they describe two related but distinct kinds of relationship, and the difference can matter a great deal if something goes wrong. A partnership, governed by Ontario’s Partnerships Act, generally involves two or more people carrying on business together, in common, with a view to profit — an ongoing relationship that continues until it’s formally wound up.

A joint venture, by contrast, is often understood as a narrower, project-specific collaboration — two or more parties combining resources, expertise, or capital toward a defined undertaking, such as developing a single property, bidding on a particular contract, or launching one product. Once that defined purpose is achieved (or abandoned), the joint venture is generally intended to come to an end, rather than continuing as an open-ended business.

Importantly, “joint venture” doesn’t have its own standalone statute in Ontario the way partnerships do. It’s better understood as a flexible contractual arrangement that can be structured in different ways — sometimes through a simple contract between the parties, sometimes through a jointly owned corporation, and sometimes in a form close enough to a partnership that partnership law ends up applying anyway. For background on how general partnerships work by default, see our guide to general vs. limited partnerships in Ontario.

A recurring theme in Ontario partnership law is that courts look at substance, not labels. Parties can call their arrangement a “joint venture” in a written contract, but if the actual relationship looks like an ongoing business carried on in common with a view to profit — with shared management, shared profits (not just shared costs or revenue), and no clearly defined end point — a court can still find that a partnership exists in law.

This cuts both ways. Parties who intend a genuinely limited, single-project collaboration can protect that intention by documenting it clearly — defining the specific project, its expected duration, and what happens on completion — so the arrangement doesn’t drift, in substance, into something closer to an ongoing partnership. Conversely, parties who assume their “joint venture” label shields them from partnership-style liability may be surprised to learn that a court is prepared to look past the label entirely.

This is also why the written agreement matters so much in practice. A contract that clearly limits the scope, duration, and purpose of the collaboration gives a court (and the parties themselves) something concrete to point to if the characterization of the relationship is ever disputed — whether in a lawsuit between the parties or a claim brought by an outside creditor.

In a general partnership, each partner can generally be held personally, jointly liable for obligations another partner creates within the scope of ordinary partnership business — even obligations the other partner knew nothing about in advance. Our guide to partnership liability in Ontario covers this exposure in more detail.

A properly structured joint venture, by contrast, is often set up so that each party remains responsible for its own obligations and contributions to the project, rather than automatically being on the hook for the other party’s conduct. This is frequently achieved through a contract that defines each party’s separate responsibilities, rather than creating a single combined pool of joint and several liability the way a general partnership typically does.

That said, this separation isn’t automatic — it depends on how the joint venture actually operates and how its contract is drafted. If the arrangement functions, in substance, like an ongoing shared business rather than a defined project with separate roles, a court may apply partnership-style liability principles regardless of the chosen label. This is one of the main practical reasons parties entering a project-specific collaboration take care to define its scope and limits clearly in writing.

Partnership governance, absent an agreement saying otherwise, tends to be ongoing and general — partners typically have a right to participate in management of the business as a whole, and significant decisions often require unanimous or majority consent under the Partnerships Act’s default rules. Our guide to decision-making and voting rights in an Ontario partnership covers how this generally works.

Joint venture governance is more commonly tied to the specific project at hand. The governing contract might specify who makes which decisions for that project, how disputes about the project are resolved, and a defined end date or completion milestone at which the governance structure (and the venture itself) comes to a close. This project-specific framing is part of what distinguishes a joint venture from an open-ended partnership in practice.

Some joint ventures are structured through a jointly owned corporation rather than a direct contract between the parties, which brings in corporate governance rules — shareholder agreements, directors, and corporate decision-making — layered on top of the underlying joint venture relationship. That structure is a meaningfully different legal framework from both a straightforward contractual joint venture and a general partnership.

A few recurring scenarios tend to raise the partnership-versus-joint-venture question in practice. Two contractors collaborating on a single development project, for example, may describe their arrangement as a joint venture, but if they also collaborate on an ongoing basis across multiple projects, sharing profits generally rather than per-project, that pattern starts to look more like a partnership.

Similarly, two professionals who agree to “team up” on one engagement, intending it as a one-off joint venture, may find the arrangement extends informally to further work without anyone revisiting the structure — at which point the relationship may have drifted, in substance, closer to an ongoing partnership than either side originally intended.

Real estate development is one of the more common contexts where joint ventures are used deliberately, precisely because the parties often want a structure limited to a single property or project, with liability and profit-sharing defined by contract rather than an open-ended business relationship. Even there, careful drafting matters, since lenders, co-owners, and tax treatment can all turn on how the arrangement is actually characterized.

Whichever structure actually fits a given collaboration, a clear written agreement is the most reliable way to make the parties’ intentions explicit — defining the scope of the undertaking, whether it’s project-specific or ongoing, how profits and losses are shared, how liability is allocated between the parties, and what happens when the project (or the relationship) ends.

For an ongoing business relationship intended to function as a genuine partnership, our guide to partnership agreements in Ontario walks through what a thorough agreement typically covers. For a narrower, project-specific collaboration, the equivalent joint venture agreement should focus on clearly bounding the project’s scope and duration, precisely because that boundary is what distinguishes the arrangement from a partnership in the eyes of the law.

More broadly, our Partnerships hub covers the full range of issues that arise once two or more people or businesses decide to work together, from formation through to disputes and dissolution.

Whichever structure fits a given situation, it’s worth revisiting as circumstances change. A joint venture that was meant to be limited to one project can, over time, grow into something closer to an ongoing partnership if the parties keep collaborating beyond the original scope — and at that point, it’s worth re-examining whether the original agreement still reflects how the relationship is actually functioning, or whether it needs to be updated to match the reality on the ground.