Indemnification Clauses in Ontario Contracts Explained

An indemnification clause — often just called an indemnity — is a promise by one party to cover specified losses, claims, damages, or costs that the other party incurs because of particular events described in the contract. In plain terms, it’s a way of shifting a defined financial risk from one side of the deal to the other, in advance, rather than leaving it to be argued over after something goes wrong.

Indemnities commonly cover things like a breach of the contract, negligence in performing it, intellectual property infringement, or claims brought by someone outside the contract entirely — a customer, an employee, or a member of the public — that are connected to one party’s conduct. Because an indemnity is a creature of contract, what it actually covers, how it’s triggered, and how much can be claimed under it all depend entirely on the specific wording the parties agreed to.

Indemnities show up across almost every type of commercial agreement in Ontario — service agreements, supply contracts, leases, technology agreements, and more — because almost any ongoing relationship creates some risk that one party is better placed to bear, or better placed to insure against, than the other.

The underlying idea is a familiar one even outside legal contracts: whoever is in the best position to control a risk, or to insure against it, is often the party asked to bear the financial consequences if that risk materializes. A contractor controls how work is performed on a job site, so it’s commonly asked to indemnify the property owner for injuries connected to that work. A software vendor controls what goes into its own product, so it’s commonly asked to indemnify a customer against claims that the product infringes someone else’s intellectual property. The clause simply puts that allocation of risk into words the parties can point back to later.

Indemnification clauses and limitation of liability clauses are often confused, partly because they usually sit near each other in a contract and both deal with financial exposure. They do different jobs. An indemnity clause shifts a defined category of loss onto one party, often including losses that originate from someone outside the contract altogether. A limitation of liability clause instead caps the total amount a party can be required to pay in damages, regardless of who caused the loss.

In many contracts, the two work together: a limitation of liability clause sets an overall ceiling on damages generally, while a separate indemnity carves out specific risks — like third-party claims or intellectual property infringement — that are either excluded from that cap or subject to a different, often higher, cap of their own. Our guide to contract damages covers how damages are generally calculated once a dispute moves past the question of which clause applies.

The two clauses can also interact in less obvious ways. Some contracts specifically exclude indemnified losses from the general limitation of liability cap, meaning the overall cap doesn’t limit what can be claimed under the indemnity. Others fold indemnified losses into the same cap as everything else. Because this interaction can significantly change how much exposure each party actually faces, it’s one of the more important details to check when both types of clause appear in the same contract.

Some indemnity clauses are one-sided, with only one party agreeing to indemnify the other. This is common where the risk genuinely sits on one side — for example, a contractor indemnifying a property owner for injuries connected to the contractor’s work on site, since the contractor controls that risk far more directly than the owner does.

Other clauses are mutual, with each party agreeing to indemnify the other for losses connected to risks it specifically controls or creates — each side typically indemnifying the other for claims arising from its own breach, negligence, or misconduct, rather than one party bearing all of the exposure. Mutual indemnities tend to show up more often in agreements between parties of roughly equal bargaining position, while one-sided indemnities are more common where the relationship is inherently asymmetric, such as a service provider and client relationship with different risk profiles on each side.

Few indemnity clauses are unlimited in practice. Most include carve-outs that narrow what’s actually covered — commonly excluding losses caused by the indemnified party’s own negligence, misconduct, or breach of the contract, so the indemnifying party isn’t left covering a problem the other side caused. Carve-outs can also exclude specific categories of damage, such as indirect, consequential, or reputational losses, from the scope of what can be claimed.

Many clauses also include a cap — a maximum dollar figure, or a formula tied to something like total fees paid under the contract — limiting how much can be recovered even if the actual loss is larger. Caps are a frequent point of negotiation, since a party agreeing to indemnify generally wants some ceiling on its exposure, while the party relying on the indemnity wants that ceiling set high enough to actually matter if a significant claim arises.

One of the most practically important details in any indemnity clause is what actually triggers the obligation to pay. Some clauses are triggered simply by a claim or demand being made against the indemnified party, meaning the indemnifying party may need to step in and defend, or pay, well before any court has decided anything. Others require a settlement to be reached or a final judgment to be issued establishing the loss before any payment obligation arises.

Many indemnity clauses also set out a notice process — requiring the indemnified party to promptly tell the indemnifying party about a claim, and sometimes giving the indemnifying party the right to control the defence of that claim. Missing these procedural requirements can affect whether an indemnity is actually enforceable when it matters, which is a reminder that an indemnity clause isn’t just about the headline promise to pay — the mechanics around it matter just as much.

Because indemnity clauses vary so much from one contract to the next, reading the actual wording closely tends to matter more than relying on a general sense of what an “indemnity” usually means. Worth checking: what specific events or losses are covered, whether legal fees and defence costs are included, what carve-outs apply, whether there’s a cap, and what triggers the obligation to pay.

It’s also worth remembering that an indemnity clause is a contractual promise, not a guarantee of payment — its real-world value depends on the indemnifying party’s ability to actually pay if a claim arises, which is one reason insurance requirements are often paired with an indemnity in the same agreement.

Finally, it’s worth remembering that indemnity clauses are negotiated terms, not something handed down by a fixed legal formula. A party being asked to indemnify broadly can reasonably push for carve-outs, a cap, or a requirement that it control the defence of any claim before agreeing to foot the bill. A party relying on an indemnity can reasonably push for a cap high enough to matter, clear triggering language, and confirmation that the other side carries insurance capable of actually responding to the risk. Treating the clause as a point of genuine negotiation, rather than standard boilerplate to skim past, tends to produce a document that holds up better if it’s ever actually needed. If a dispute arises over whether an indemnity applies, our contract disputes hub and guide to breach of contract cover the general process for raising and resolving a disagreement like this.