Limitation of Liability and Indemnity Clauses in Ontario Contracts

A limitation of liability clause in an Ontario contract is one of the most negotiated — and most litigated — provisions in commercial agreements. Done well, it allocates risk sensibly between the parties and avoids catastrophic, open-ended exposure. Done poorly, it can be struck down by a court at exactly the moment you need it most. This article explains what limitation of liability and indemnity clauses do, how Ontario courts approach them, the difference between mutual and one-sided indemnities, consequential damages exclusions, and practical guidance for small businesses drafting or reviewing commercial contracts.

What a Limitation of Liability Clause Does

A limitation of liability clause caps the amount one party can recover from the other if something goes wrong. Instead of facing an unlimited damages claim, the party in breach has its exposure capped — typically at one of the following benchmarks:

• The fees paid under the contract (often the preceding 12 months)
• A fixed dollar amount
• The amount available under a specific insurance policy

These clauses are extremely common in service agreements, technology contracts, supply agreements, and professional services engagements. They exist because unlimited liability is commercially unworkable: a software vendor charging $5,000 per month cannot absorb a $10-million damages claim if their product goes down at the wrong moment.

What an Indemnity Clause Does

An indemnity clause is a promise by one party to compensate the other for specific losses — often losses caused by third-party claims. Indemnities go beyond a simple damages claim because they:

• Shift liability that might not otherwise flow under general contract or tort principles
• Cover legal defence costs, not just final judgments
• Can be triggered even if the indemnifying party was not negligent

A typical technology contract might include an indemnity from the vendor covering third-party intellectual property infringement claims arising from the customer's use of the vendor's software. A construction subcontract might include a broad indemnity from the subcontractor covering any claims arising from the subcontractor's work on the site.

How Ontario Courts Treat These Clauses

Ontario courts enforce limitation of liability and indemnity clauses between commercial parties — but with important qualifications.

The Notice Requirement

Courts have long held that an exclusion or limitation clause must be brought to the other party's attention before the contract is formed. A limitation buried in Schedule F of a 40-page agreement handed to someone at the moment of signing may not be enforceable, particularly if it limits liability in a way the other party would not reasonably expect. Best practice: highlight the clause, negotiate it explicitly, and ensure both parties acknowledge it.

Strict Construction

Ontario courts interpret exclusion and limitation clauses strictly and against the party relying on them. If a clause is ambiguous, the court will generally read it narrowly. This means poorly drafted clauses — ones that arguably do not cover the type of loss at issue — will be construed against the drafter.

Unconscionability and Fundamental Breach

Courts retain discretion to decline to enforce a limitation clause where the result would be unconscionable, or where the breach was so fundamental that enforcing the limitation would be contrary to the reasonable expectations of the parties. This doctrine has been applied inconsistently, but it remains a risk where one party has significantly more bargaining power and the limitation is extreme.

Consumer Contracts vs Commercial Contracts

The Consumer Protection Act in Ontario places additional restrictions on limitation and exclusion clauses in consumer contracts. The analysis in this article focuses on business-to-business commercial agreements. If your contract involves a consumer, seek legal advice on the specific rules that apply.

Mutual vs One-Sided Indemnities

An indemnity can run in one direction only (one-sided) or both directions (mutual).

One-sided indemnities are common in standard-form vendor contracts, where the supplier indemnifies the customer against IP infringement claims but the customer bears all other risk. They are also common in construction contracts, where the party with the greatest site control takes on the broadest indemnity obligation.

Mutual indemnities require each party to indemnify the other for losses arising from their own negligence, breach, or specific categories of risk. They are fairer in many commercial contexts and are easier to negotiate because each party sees the reciprocal benefit.

When reviewing a contract, pay close attention to:

• Which party carries the indemnity obligation. A one-sided indemnity that runs entirely against your business is a significant assumption of risk.
• The trigger. Does the indemnity apply only to the indemnifying party's negligence, or does it cover all claims arising from the work regardless of fault? "Arising from" triggers are broader than "caused by" triggers.
• Defence obligations. Some indemnities require the indemnifying party to take over the defence of third-party claims. This can be valuable (they pay for the lawyers) or problematic (they control the litigation strategy).
• Insurance requirements. An indemnity is only as good as the indemnifying party's ability to pay. Require adequate insurance — and proof of it — to back up the indemnity.

Consequential Damages Exclusions

Most commercial limitation clauses pair a liability cap with an exclusion of consequential, indirect, incidental, or punitive damages. These exclusions are important because consequential damages — the ripple-effect losses that flow from a breach — can dwarf the direct loss.

For example: if a cloud software provider's system goes down and a retailer loses a day of online sales during a Black Friday promotion, the direct loss (the subscription fee paid) may be trivial. The lost revenue, lost customer relationships, and reputational damage could be enormous. Without a consequential damages exclusion, the software provider faces that entire claim.

Common exclusion language covers: loss of revenue, loss of profit, loss of data, loss of business opportunity, and damage to goodwill. Courts read these lists literally — if a type of loss is not on the list, the exclusion may not cover it.

Carve-outs from the exclusion are equally important. Even in contracts with broad consequential damages exclusions, parties often carve out:

• Indemnity obligations (particularly IP indemnities)
• Confidentiality breaches
• Wilful misconduct or gross negligence
• Death or personal injury

A vendor's insistence on excluding consequential damages while also insisting that its own indemnity rights are unlimited creates an asymmetric arrangement worth flagging in negotiations.

Practical Drafting Guidance for Ontario Small Businesses

Whether you are the service provider or the customer, here are the questions to ask before signing:

What is actually capped? Read the cap formula carefully. "Fees paid in the 12 months preceding the claim" can be $0 if the claim arises at the start of the engagement.

What falls outside the cap? Most commercial contracts have carve-outs. Check whether the losses most likely to arise in your industry are inside or outside the cap.

Is the cap mutual? If the vendor caps its liability at six months of fees but you have unlimited liability for any breach of your payment or data-use obligations, that is asymmetric risk.

What types of damages are excluded? Confirm the exclusion list and check that it does not inadvertently exclude losses that are foreseeable and direct in your specific context.

Does the indemnity require notice? Many indemnity clauses require prompt written notice of a claim and the right to control the defence. Missing a notice requirement can void the indemnity.

Is there sufficient insurance? A limitation of liability clause reduces your exposure; an indemnity clause shifts it to the other party. Neither protects you if the other party cannot pay. Require proof of adequate commercial general liability and errors and omissions coverage.

Frequently asked questions