Difference Between Express, Implied and Quasi‑Contracts

Contracts are fundamental to the legal framework governing agreements between parties. Whether in business transactions or daily life, contracts establish rights and obligations. 

Understanding the different types of contracts is essential for navigating legal relationships effectively. In India, the Indian Contract Act, 1872 governs contract law and recognises various forms of contracts, including express contracts, implied contracts, and quasi‑contracts.

What is an Express Contract?

An express contract is the most common and straightforward form of contract. It is an agreement where the terms and conditions are clearly and explicitly stated by the parties involved. These terms can be communicated either verbally or in writing.

In an express contract, the parties engage in a clear dialogue or documentation specifying the essential terms such as the offer, acceptance, consideration (something of value exchanged), and the intention to create legal relations.

Essential elements of an express contract include:

• Offer: One party proposes specific terms.
• Acceptance: The other party unconditionally agrees to those terms.
• Consideration: There is an exchange of something valuable between the parties.
• Mutual intention: Both parties intend to be legally bound by the agreement.
• Capacity and legality: Parties must have the legal ability to contract, and the contract’s subject matter must be lawful.

For example, when you sign a lease agreement to rent an apartment, all terms like rent amount, duration, and maintenance responsibilities are explicitly laid out. This forms a valid express contract.

What is an Implied Contract?

Unlike express contracts, implied contracts are not spoken or written but are formed based on the conduct, actions, or circumstances of the parties. The law presumes that the parties intended to create a contract because their behaviour reasonably indicates an agreement.

There are two types of implied contracts:

Implied-in-Fact Contract

This type arises when the parties’ actions demonstrate mutual consent even though no explicit words were exchanged. For instance, if you visit a restaurant and order food, there is no written or spoken agreement specifying that you will pay, but your conduct—ordering and consuming the meal—implies a contract to pay the price listed.

Implied-in-Law Contract (Quasi-Contract)

This is a legal concept used to prevent unjust enrichment. Even if there was no agreement or intention between parties, the law imposes an obligation to ensure fairness. It is not a contract in the traditional sense but a remedy imposed by courts.

For example, if a doctor provides emergency treatment to an unconscious person, the person is liable to pay for the services even though they did not explicitly agree to the treatment.

Key Differences Between Express, Implied and Quasi-Contracts

Understanding the differences between these contracts is essential for applying the correct legal principles in each case.

Formation and Expression

• Express Contract: Formed through clear, explicit communication—either oral or written. The parties openly state their terms and intentions.
• Implied Contract: Formed through the conduct or situation of the parties. No direct words or writing are necessary, but actions indicate consent.
• Quasi-Contract: Created by law to rectify situations where one party benefits unfairly at another’s expense. There is no agreement or consent between parties.

Consent and Intention

• Express Contract: Both parties give actual consent to the terms, fully understanding their legal obligations.
• Implied Contract: Consent is inferred from actions and behaviour, suggesting the parties intended to contract.
• Quasi-Contract: No consent or intention is needed. The court imposes the obligation to prevent injustice.

Evidence and Proof

• Express Contract: Easier to prove due to written or verbal documentation of terms.
• Implied Contract: More difficult to prove; courts rely on evidence of conduct, circumstances, and customs.
• Quasi-Contract: Evidence involves proving unjust enrichment or benefit conferred without compensation.

Legal Purpose

• Express Contract: To create binding agreements reflecting the parties’ negotiated terms.
• Implied Contract: To uphold agreements reasonably inferred from the parties’ dealings.
• Quasi-Contract: To enforce fairness and prevent one party from being unjustly enriched at another’s expense.

Examples

• Express Contract: Employment contracts, lease agreements, sale deeds.
• Implied Contract: Eating at a restaurant, taking a taxi ride, receiving services without a written agreement but with an expectation of payment
• Quasi-Contract: Mistaken delivery of goods, emergency medical services rendered without prior consent.

Enforceability

• Express Contract: Generally straightforward to enforce provided all essential elements are met.
• Implied Contract: Enforceable if the conduct clearly shows agreement; disputes may arise due to ambiguity.
• Quasi-Contract: Enforceable by courts as an equitable remedy; not based on agreement but on principles of justice.

Role in Contract Law

• Express Contract: Forms the basis for most contractual relationships; explicit terms avoid confusion.
• Implied Contract: Recognises that not all agreements are formally documented but still intend legal effect.
• Quasi-Contract: Acts as a legal safety net to prevent unjust enrichment and ensure fair dealings where contracts do not exist.

Summary Table: Express vs Implied vs Quasi Contracts

Conclusion

Contracts govern countless interactions, and knowing the difference between express, implied, and quasi-contracts is crucial.

• Express contracts rely on explicit communication, offering clarity and certainty.
• Implied contracts allow the law to infer agreements based on conduct and circumstances, supporting everyday transactions without formalities.
• Quasi-contracts operate as a legal safeguard, preventing unjust enrichment by imposing obligations even when no agreement exists.

A thorough understanding of these distinctions equips individuals and businesses to structure agreements effectively, avoid disputes, and recognise when legal obligations arise—even in the absence of formal documentation. For legal practitioners, clarity on these types aids in advising clients and enforcing contractual rights in Indian courts.