Warranty

A warranty is an undertaking frequently used in contractual contexts.

Explained – what is a warranty?

A warranty means that a party assumes responsibility for a particular attribute or function, often for a defined period. It may, for example, cover that a product functions as agreed or that a service is performed in a specified manner. In contract law, a contractual warranty can be used to create certainty and clarity between the parties. A contract lawyer will often draft the warranty clause to ensure an appropriate balance in the agreement and to manage warranty liability.

When does a contractual warranty become relevant?

The issue of warranty becomes particularly relevant where a product or service does not meet the expectations or conditions agreed between the parties. This may concern, for example, a defect in goods, deficiencies in a construction project, or undertakings given in a corporate acquisition. In such cases, the warranty is central to determining warranty liability and what contractual remedies may be available, including remedies for breach of warranty.

Illustration of two businesspeople reviewing a written warranty document, symbolising product warranty terms, consumer rights, and contract compliance.

Points to consider for a warranty clause

When organisations work with warranties, certain core issues should be addressed so that agreements are clear and durable. These points help define the scope of any general warranty, limited warranty, performance warranty or fitness for purpose warranty.

Define precisely what the warranty covers and for what period the contractual warranty applies.
Decide whether the warranty is limited to specific situations or applies generally under the warranty clause.
Ensure that limitations of liability and available warranty remedies are regulated in the agreement to allocate warranty liability fairly.
Consider whether the warranty applies in addition to statutory rights, for example consumer protection.
Draft the warranty terms so they are comprehensible to both parties and align with warranties and representations elsewhere in the contract.
Review warranty clauses during negotiations to avoid imbalance and to clarify the seller warranty and any warranty exclusions.

By working systematically with warranties, the parties can create clarity and trust, which supports long-term business relationships and reduces the risk of warranty breach.

Warranty

Why is a warranty important?

A warranty is important because it strengthens trust between contracting parties. It provides assurance that a certain quality or performance will be delivered, which reduces uncertainty and sets clear expectations. In this way, the contractual warranty serves as a tool to manage and allocate warranty liability and to structure the remedies available in case of a warranty claim.

In many cases, warranties become decisive in negotiations and can affect both price and terms. They may also be central in disputes, as the warranty often determines who bears responsibility for a defect or deficiency and what warranty remedies are available.

Through well-drafted warranties, organisations demonstrate that they stand behind their commitments. This helps establish stable contractual relationships and increases confidence between the parties, thereby strengthening the basis for long-term cooperation and clarifying remedies for breach of warranty.

A warranty in a contract is a promise that a particular performance, good or service meets specified conditions for a defined period. In short, it answers “what is a warranty in contract law” in practical terms.

Warranties are often used in corporate acquisitions, supply agreements and construction contracts. They operate as protection for the buyer by regulating warranty liability if something does not match what was promised, and by setting out the process for a warranty claim.

The statutory right to complain cannot be contracted out of, whereas a warranty is a voluntary undertaking. A warranty can provide additional rights beyond what the law already offers, typically via a dedicated warranty clause and defined warranty remedies.

To avoid ambiguity, the warranty should be in writing and include:

Which conditions are covered by the warranty clause and any warranty exclusions.
How long the contractual warranty applies.
Which remedies become available if the conditions are not satisfied (for example, remedies for breach of warranty).

The party giving the warranty is responsible for ensuring that the conditions are met. Depending on the agreement, this may be a seller, supplier or contractor, and the seller warranty will typically define the scope of responsibility.

A warranty lasts for the period agreed between the parties, often between one and three years. In some sectors, longer periods are common, especially for construction works and technical equipment. The key is that the warranty period is clearly set out in the agreement—answering the practical question “how long does a warranty last”—and that the terms are documented in writing.