- An assignment transfers the benefit of a contract from one party to another.
- Novation is a different, more complete transaction.
People often use "novation" and "assignment" as if they mean the same thing — transferring a contract to someone new. They don't. The difference determines who remains legally responsible if something goes wrong, and getting it wrong can leave the wrong party, or no party at all, on the hook.
This article breaks down what each concept actually means under Ontario contract law, and why the distinction becomes critical the moment a dispute arises.
Assignment in a Nutshell
An assignment transfers the benefit of a contract from one party to another. The assignor hands off their right to receive payment, goods, or services, but their own obligations under the contract generally stay with them unless something else releases them. The other original contracting party doesn't need to be an active participant in most assignments, though their consent may be required if the contract says so.
Novation in a Nutshell
Novation is a different, more complete transaction. It replaces one contracting party with a new one entirely, and — critically — releases the original party from further responsibility under that contract. Because it discharges an existing party's obligations, novation legally requires the agreement of all three parties involved: the original two contracting parties and the incoming replacement party. Without that three-way consent, there's no novation — just, at most, an assignment.
Side-by-Side Comparison
| Assignment | Novation | |
|---|---|---|
| What transfers | The benefit (rights) only | Both rights and obligations |
| Who must agree | Often just the assignor and assignee, subject to the contract's terms | All three parties: both original contracting parties and the incoming party |
| Is the original party released? | No — they generally remain liable for their own obligations | Yes — that's the defining feature of novation |
| Typical use case | Transferring a right to receive payment or services | Replacing a supplier, tenant, or contracting entity entirely, with a clean break for the outgoing party |
Why the Difference Matters in a Dispute
If a business changes hands, a supplier is replaced, or a lease is transferred, the label the parties used matters far less than what actually happened. A court will look past the word "assignment" or "novation" in a document and ask what the parties actually agreed to, and whether the right people consented.
This becomes important when something goes wrong after the transfer:
- If it was truly an assignment, the original party may still be pursued for their own unmet obligations, even though someone else now receives the benefit.
- If it was truly a novation, the original party is out of the picture entirely — which means a dispute has to be pursued against the new party instead, and any argument that the original party is still responsible will generally fail.
- If the paperwork is unclear or incomplete, the parties may end up in a dispute just to establish which transaction actually occurred.
Common Situations Where This Comes Up
- A business sale where the buyer wants to step into existing supplier or customer contracts
- A commercial lease transfer where a new tenant takes over
- A construction project where a subcontractor is replaced partway through
- A loan or financing arrangement where a new lender takes over from the original one
In each case, whether the outgoing party is truly released — or still exposed — depends entirely on whether a genuine, properly consented novation occurred.
Frequently asked questions
Can a contract be novated without a written agreement?
Novation requires clear evidence that all three parties agreed to release the original party and accept the new one. While this doesn't always require a single formal document, relying on anything less than clear written consent from everyone involved is risky and can leave the intended release in doubt.
If a contract says "this agreement may be assigned," does that mean it can also be novated?
Not necessarily. A clause permitting assignment addresses the transfer of rights; it doesn't automatically mean the other party has agreed in advance to release the original party from its obligations, which is what novation requires.
Is novation the same as terminating one contract and signing a new one?
They can achieve a similar practical result, but they're legally distinct routes. Novation typically preserves the substance of the original agreement while substituting a party; terminating and re-contracting starts fresh and can raise its own issues, such as whether existing terms or protections carry over.
What happens if the parties disagree about whether a novation actually happened?
This becomes a factual and legal question for a court, or another dispute process, to resolve, based on the contract's wording, communications between the parties, and their conduct. This is exactly the kind of dispute where getting legal advice early matters.
This is a litigation question
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