- An assignment transfers the benefit of a contract — the right to receive payment, services, or performance — from one party (the assignor) to someone else (the assignee).
- Ontario law generally treats contractual rights as assignable unless something blocks it.
- Some rights resist assignment, either because of their nature or because the contract says so: - Personal service obligations — where the identity or specific skill of the party matters,…
Businesses sell divisions, people sell receivables, landlords change hands, and contracts get assigned along the way more often than most people realize. But not every right in a contract can simply be handed off to someone else, and getting an assignment wrong can leave the new party without the protection they thought they were buying.
This guide explains what assigning a contract actually means in Ontario, what typically can and can't be transferred, and why the wording of the original contract often has the final say.
What "Assigning" a Contract Actually Means
An assignment transfers the benefit of a contract — the right to receive payment, services, or performance — from one party (the assignor) to someone else (the assignee). Importantly, a straightforward assignment does not transfer obligations. The assignor generally remains responsible for their own duties under the contract unless the other original party agrees otherwise.
This is a key distinction from novation, which replaces a party entirely and can release the original party from further responsibility. An assignment is usually simpler and faster, and often doesn't require the other contracting party's active involvement — though it can still require their consent.
What Can Usually Be Assigned
Ontario law generally treats contractual rights as assignable unless something blocks it. Common examples include:
- The right to receive payment under an invoice or loan
- The right to receive goods or services under a supply agreement
- Rights under many commercial leases, subject to landlord consent requirements
- Rights to insurance proceeds in some circumstances
What Often Can't Be Assigned
Some rights resist assignment, either because of their nature or because the contract says so:
- Personal service obligations — where the identity or specific skill of the party matters, courts are reluctant to let that obligation be assigned to someone else without consent.
- Rights blocked by an anti-assignment clause — many commercial contracts specifically prohibit assignment without the other party's written consent.
- Rights that would materially increase the other party's burden — an assignment generally cannot make the other side's obligations more onerous or risky than what they originally agreed to.
- Certain rights tied to a specific relationship, such as some licences and permits that legally cannot be transferred to someone else.
Anti-Assignment Clauses: How They Work
| Clause Type | Typical Effect |
|---|---|
| Silent (no clause at all) | The right is generally assignable, subject to the general limits above. |
| "Not assignable without consent" | Assignment is possible but requires the other party's agreement — often not to be unreasonably withheld, depending on the wording. |
| Absolute prohibition | Assignment attempted in breach of a clear, absolute prohibition can be ineffective, or itself a breach of contract, depending on the clause and the surrounding facts. |
Because outcomes turn heavily on the specific clause language, don't assume a general prohibition automatically voids every attempted assignment, or that silence means anything goes — have the actual wording reviewed.
Legal vs. Equitable Assignment: Why Notice Matters
- The assignor and assignee agree to the transfer. This step alone may only create an equitable interest.
- Written notice is given to the other original contracting party (the obligor). Notifying the obligor in writing is typically what allows the assignee to enforce the right directly, in their own name, rather than needing the assignor to be involved in any enforcement action.
- The obligor now owes performance to the assignee, and should generally direct payment or performance accordingly once properly notified.
Skipping proper notice is one of the most common practical mistakes — an assignee who never notifies the obligor may find enforcement more complicated than expected.
Frequently asked questions
Do I need the other party's permission to assign a contract?
It depends entirely on what the contract says. If it's silent, assignment is often possible without consent, subject to general limits. If it contains an anti-assignment clause, you may need written consent, and ignoring that requirement can create a dispute even if the underlying right would otherwise be assignable.
What's the difference between assigning a contract and assigning just a debt?
Assigning a debt — the right to be paid a specific amount — is one common example of assigning a contractual right, and follows the same general principles. "Assigning a contract" more broadly can also involve other rights, like the right to receive ongoing services.
If I assign my rights, am I still on the hook for my own obligations?
Generally yes. A simple assignment transfers rights, not obligations — you typically remain responsible for anything you were required to do under the contract unless there's a separate release or novation agreement.
Can an assignment happen without anyone signing anything?
An assignment can sometimes happen through conduct or a simple written notice, but relying on an informal or undocumented assignment is risky. Clear, written documentation protects everyone involved if a dispute arises later.
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