Doctrine of Unjust Enrichment and Indian Contract Act

The doctrine of unjust enrichment is an important principle in the law of obligations. It is based on the idea that no person should be allowed to benefit unfairly at the expense of another. If a person obtains a benefit without a lawful basis and retains it, the law requires that person to restore the benefit or provide compensation. The doctrine is closely connected with the principles of justice, equity and good conscience.

In India, the doctrine of unjust enrichment finds recognition primarily in Sections 68 to 72 of the Indian Contract Act, 1872. These provisions deal with situations known as quasi-contracts or relations resembling those created by contracts. In such situations, there is no actual agreement between the parties, yet the law imposes an obligation on one party to compensate the other in order to prevent unjust gain.

The doctrine has its roots in English law but has gradually evolved in India through statutory provisions and judicial interpretation. Courts have repeatedly emphasised that unjust enrichment must be neutralised so that fairness and equity are maintained in legal relationships.

Meaning of Doctrine of Unjust Enrichment

Unjust enrichment refers to a situation where a person receives or retains a benefit at the expense of another without a legal justification. Such benefit is not intended as a gift and is not supported by a valid contract or other legal basis. In such circumstances, the person who has received the benefit is required to return it or provide compensation.

The principle can be understood through the following idea: if one person gains a benefit and another person suffers a loss as a result of that gain, the law intervenes to restore balance. The aim is not to punish the beneficiary but to ensure that unjust gain is not retained.

The concept was clearly recognised in Moses v. Macferlan, where it was held that a defendant who has obtained money unjustly is obliged by principles of natural justice and equity to refund it. This case laid the foundation for the doctrine in English law.

Another important explanation of the principle appears in Fibrosa v Fairbairn, where Lord Wright stated that every civilised legal system must provide remedies to prevent a person from retaining money or benefits derived from another when it would be against conscience to do so.

Evolution of the Doctrine of Unjust Enrichment

The earliest development of the doctrine can be traced to English common law actions such as “money had and received” and assumpsit. These actions were used to recover money that had been wrongfully obtained.

The principle gradually developed as an equitable doctrine and became part of the broader law of obligations. Courts of equity applied the doctrine in order to ensure that no person retained a benefit that was unjustly obtained.

In India, early recognition of the principle can be seen in Rambux Chittangeo v. Modhoosoodun Paul Chawdhry, where the court discussed the concept of implied obligations and the limitations of treating such claims strictly as contractual claims. The court recognised that certain obligations arise independently of contract and are imposed by law to prevent unfair gain.

The doctrine later received statutory recognition through Sections 68 to 72 of the Indian Contract Act, 1872, which describe certain relations resembling those created by contracts. These provisions were designed to address situations where one person receives benefits without a formal agreement but where fairness requires compensation.

Over time, the doctrine has also been recognised in other legal fields such as taxation and environmental law. The development of the doctrine has largely occurred through judicial interpretation, particularly by the Supreme Court of India.

Essentials of the Doctrine of Unjust Enrichment

The doctrine generally requires the presence of three essential elements:

Enrichment of one person

The first requirement is that the defendant must have received a benefit. The benefit may be in the form of money, services, property or any other advantage.

Enrichment at the expense of another person

The benefit received by the defendant must be connected to a corresponding loss suffered by another person. In other words, the enrichment must occur at the expense of the plaintiff.

Retention of benefit must be unjust

The most important requirement is that the retention of the benefit must be unjust or unfair. If the benefit was lawfully obtained or intended as a gift, the doctrine will not apply. The doctrine operates only when equity and justice require restoration of the benefit.

These three elements together establish the basis for imposing liability on the person who has been unjustly enriched.

Quasi-Contracts and the Indian Contract Act, 1872

The doctrine of unjust enrichment is embodied in the provisions relating to quasi-contracts under Chapter V of the Indian Contract Act, 1872. These provisions create obligations even when no contract exists between the parties.

Sections 68 to 72 deal with specific situations in which the law imposes liability in order to prevent unjust enrichment.

These provisions are described as “certain relations resembling those created by contracts.” The purpose of these provisions is not to enforce agreements but to ensure fairness where one person has received a benefit from another.

Section 68: Supply of Necessaries to Persons Incapable of Contract

Section 68 deals with the supply of necessaries to persons who are incapable of entering into a contract, such as minors or persons of unsound mind.

If a person supplies necessaries suited to the condition in life of such individuals, the supplier is entitled to reimbursement from the property of the incapable person.

Necessaries do not merely include basic necessities such as food or clothing. They include goods or services required to maintain the person according to their social status and circumstances.

In Jai Indra Bahadur Singh v. Dilraj Kaur, money advanced to a minor for the marriage of his sister was treated as necessaries. The court held that the amount could be recovered from the minor’s property.

An example may illustrate this principle. If a guardian provides essential living expenses to a minor whose parents have died, the guardian may recover the expenses from the minor’s property.

This provision ensures that persons who provide necessary support are not unfairly burdened.

Section 69: Payment by an Interested Person

Section 69 applies when a person who is interested in paying money that another person is legally bound to pay makes the payment in order to protect his own interest.

In such situations, the person who made the payment is entitled to be reimbursed by the person who was originally liable.

For example, a purchaser of property may pay municipal taxes that the seller was legally bound to pay in order to prevent the property from being auctioned.

In Dakshina Mohun Roy v Saroda Mohun Roy Chowdhry, the court held that a person who paid government revenue to prevent the sale of an estate was entitled to recover the amount from the person who was legally responsible for paying the revenue.

Similarly, in Govindram Gordhandas Seksaria v. State of Gondal, a person who paid municipal taxes to prevent the sale of property was allowed to recover the amount from the party responsible for the payment.

This provision ensures that a person who protects their own interest by paying another’s legal obligation is not unfairly disadvantaged.

Section 70: Obligation of Person Enjoying Benefit of Non-Gratuitous Act

Section 70 deals with situations where a person lawfully performs an act or delivers something to another person without intending to do so gratuitously, and the other person enjoys the benefit of that act.

In such cases, the person who receives the benefit is required to compensate the person who performed the act.

For example, if goods are mistakenly delivered to another person and that person uses them as their own, compensation must be paid.

In Modi Sugar Mills Limited v Union of India, the plaintiff had manufactured biscuits for the government and had received containers for packaging from the Union. The containers were not returned. The court held that the containers remained the property of the government and the defendant was liable to compensate for the benefit received.

Another case illustrating this principle is Great Eastern Shipping Company Limited v. Union of India, where a service was provided without the intention of doing so free of charge. Since the defendant benefited from the service, compensation was required.

This provision reflects the principle of quantum meruit, which allows recovery for the value of work performed.

Section 71: Responsibility of Finder of Goods

Section 71 deals with the obligations of a person who finds goods belonging to another person and takes them into custody.

Such a person assumes the responsibilities of a bailee. The finder must take reasonable care of the goods and make efforts to locate the true owner.

In Newman v. Bourne and Hollingsworth, a customer left a brooch in a shop. The shop assistant placed the brooch in a drawer, but it later went missing. The court held the shop owner liable because proper care had not been taken.

The law imposes these obligations to prevent misuse of another person’s property and to ensure responsible conduct by the finder.

Section 72: Money Paid by Mistake or Under Coercion

Section 72 states that a person who receives money or property by mistake or under coercion must return it.

An example would be where a person pays a debt that has already been paid earlier due to misunderstanding.

In Associated Cement Company Limited v. Union of India, railway authorities charged excess freight based on an incorrect assumption about the route. The court directed the authorities to refund the extra amount collected.

This provision ensures that payments made under error or pressure do not lead to unjust enrichment.

Restitution and Unjust Enrichment

The doctrine of unjust enrichment is closely related to the concept of restitution. Restitution refers to restoring a person to the position they were in before the unjust benefit occurred.

Restitution may involve returning property, repaying money, reimbursing expenses, or providing compensation for benefits received.

The relationship between unjust enrichment and restitution was elaborately discussed in Indian Council for Enviro-Legal Action v. Union of India. In this case, industries in Bichhri village in Rajasthan had polluted land and water bodies through hazardous waste disposal.

The Supreme Court ordered the polluting industries to pay ₹373.85 million to restore the damaged environment and compensate affected residents.

The Court explained that unjust enrichment occurs when a person retains benefits that in justice belong to another. It also stated that unjust enrichment and restitution are closely connected concepts, describing them metaphorically as two shades of green.

The Court emphasised that courts must ensure that no party gains unjust advantage by invoking legal processes or by benefiting from wrongful conduct.

The Court also referred to Padmawati v. Harijan Sewak Sangh, where the Delhi High Court observed that litigants sometimes prolong litigation to retain illegal benefits. Courts must impose realistic costs in such situations to prevent misuse of the judicial process.

Quantum Meruit and Unjust Enrichment

The doctrine of quantum meruit is closely related to unjust enrichment. The phrase quantum meruit means “as much as is earned.”

It allows a person to claim compensation for work performed when the contract cannot be completed or when the other party prevents performance.

The focus in quantum meruit is on the value of services rendered, whereas unjust enrichment focuses on the benefit gained by the defendant.

Under the Indian Contract Act, the principle of quantum meruit is reflected in Section 70, which allows compensation where a lawful act is performed for another without the intention of acting gratuitously.

Expanding Scope of the Doctrine in India

The doctrine of unjust enrichment has gradually expanded beyond the traditional boundaries of contract law.

Indian courts have applied the doctrine in areas such as:

• environmental liability
• tax refunds
• public law disputes
• restitution claims

Courts have recognised unjust enrichment as an important part of the law of obligations, alongside contract and tort.

Judicial interpretation continues to shape the doctrine, ensuring that fairness and equity remain central to legal decision-making.

Conclusion

The doctrine of unjust enrichment plays an essential role in maintaining fairness in legal relationships. It ensures that no person retains benefits obtained unfairly at the expense of another. The doctrine is grounded in principles of justice, equity and good conscience.

In India, the doctrine is reflected in the quasi-contractual provisions of Sections 68 to 72 of the Indian Contract Act, 1872. These provisions create legal obligations even in the absence of a contract in order to prevent unjust gain.

Note: This article was originally written by  Afshan Ahmad (Dharmashastra National Law University, Jabalpur) on 27 May 2020. It was subsequently updated by the LawBhoomi team on 4 March 2026.