Principle of Sanctity of Contract: Pacta Sunt Servanda in Indian Contract Law, Its Statutory Basis and the Limits the Act Places on It

Sanctity of contract is the proposition that a promise once validly made must be kept, and that a court will enforce the bargain the parties actually struck rather than the one it thinks they ought to have struck. The Latin maxim is pacta sunt servanda, agreements must be kept. The principle is not stated anywhere in the Indian Contract Act, 1872 in terms, but it is the assumption on which the Act's whole machinery of performance and breach is built. Equally, the Act itself identifies the situations in which the principle yields, and the modern case law is largely about where that line falls.

1. Origin and Meaning of the Maxim

The maxim descends from Roman law, where the praetor's edict recorded the undertaking to uphold agreements entered into, and was carried forward by the canonists, who treated the breaking of a promise as a matter of conscience as well as of law. The natural law writers, particularly Grotius, made the binding force of promises a foundation of the law of nations. From there the maxim passed into both the private law of contract and public international law, where it appears as Article 26 of the Vienna Convention on the Law of Treaties, 1969: every treaty in force is binding upon the parties to it and must be performed by them in good faith.

In private law the principle carries two connected ideas which it is useful to keep separate.

The obligation to perform. A party who has bound himself must do what he promised, and cannot resile because performance has become inconvenient, unprofitable or unwise.
The primacy of the parties' own terms. A court construes and applies the contract; it does not remake it. Where the parties have allocated a risk, the allocation governs even if the risk materialises in a way that ruins one of them.

⚠ Sanctity of contract is not the same as freedom of contract

The two are often used interchangeably and should not be. Freedom of contract governs the formation stage and asks whether a party was free to choose the terms. Sanctity governs the enforcement stage and asks whether a term freely chosen must now be honoured. A contract may be perfectly sacred in the second sense while the freedom that produced it was largely notional, which is exactly the problem that arises in standard-form contracts.

2. The Statutory Expression of the Principle

Although the Act does not use the maxim, four provisions carry it.

Sections 37 and 73, Indian Contract Act, 1872

37. Obligation of parties to contracts. The parties to a contract must either perform, or offer to perform, their respective promises, unless such performance is dispensed with or excused under the provisions of this Act, or of any other law.

Promises bind the representatives of the promisor in case of the death of such promisor before performance, unless a contrary intention appears from the contract.

73. Compensation for loss or damage caused by breach of contract. When a contract has been broken, the party who suffers by the breach is entitled to receive, from the party who has broken the contract, compensation for any loss or damage caused to him thereby, which naturally arose in the usual course of things from such breach, or which the parties knew, when they made the contract, to be likely to result from the breach of it.

Such compensation is not to be given for any remote and indirect loss or damage sustained by reason of the breach.

Section 37 states the obligation itself in mandatory language and makes clear that the only escapes are those the Act or another law provides. It is the nearest the statute comes to enacting the maxim.
Section 73 supplies the sanction. The measure of damages is the position the injured party would have occupied had the promise been performed, so the law's remedy is directed at vindicating the expectation the promise created.
Explanation 2 to Section 25 provides that an agreement is not void merely because the consideration is inadequate. The court does not weigh the bargain.
Sections 46 to 50 and 59 to 61 are default rules on time, place and appropriation which operate only in the absence of contrary agreement, so the parties' own stipulation always prevails.

2.1 The court does not make a contract for the parties

The corollary most frequently applied in practice is that a court cannot supply a term the parties did not agree, or relieve a party from a term they did. In General Assurance Society Ltd. v. Chandmull Jain, AIR 1966 SC 1644, the Supreme Court held that in construing a contract of insurance the court must give effect to the language the parties used and cannot make a new contract for them, however unreasonable the result may appear. The same reasoning underlies the reluctance of courts to imply terms: a term will be implied only where it is necessary to give business efficacy to the contract, not merely because it would be reasonable.

3. The Principle Applied: Hardship Is Not an Excuse

The most litigated aspect of sanctity in India is the claim that performance has become so much more burdensome than expected that the promisor should be released. The answer has been consistent for more than sixty years.

📖 Alopi Parshad & Sons Ltd. v. Union of India, AIR 1960 SC 588

Facts: Agents appointed to purchase and supply ghee to the Government during the Second World War claimed enhanced rates after the war, on the footing that conditions had altered fundamentally from those contemplated when the agreement was made and that the agreed remuneration had become wholly inadequate.

Held: The Supreme Court rejected the claim. A contract is not frustrated merely because circumstances in which it was made are altered. The Court held that the Act does not enable a party to a contract to ignore the express covenants because performance has become onerous on account of an unforeseen turn of events, and that the parties must be held to the terms on which they contracted.

Ratio: Altered circumstances and increased cost do not discharge a contract. Performance that has become more expensive is still performance that is due.

📖 Energy Watchdog v. Central Electricity Regulatory Commission, (2017) 14 SCC 80

Facts: Power generators had entered into long-term power purchase agreements at tariffs fixed by competitive bidding. A change in Indonesian law caused a steep rise in the price of imported coal. The generators sought relief on the ground of force majeure and, in the alternative, frustration under Section 56.

Held: The Supreme Court refused relief. Clause 12.4 of the agreements expressly excluded a rise in fuel cost from the definition of force majeure, and the parties having allocated that risk, the allocation governed. The Court further held that where a contract contains a force majeure clause which on construction is attracted to the facts, Section 56 can have no application, and that in any event an alternative mode of performance remained available, albeit a more expensive one.

Ratio: Commercial hardship, however severe, is not frustration. Where the parties have expressly allocated a risk, the court enforces the allocation and will not use Section 56 to redistribute it.

The same principle was applied in Naihati Jute Mills Ltd. v. Khyaliram Jagannath, AIR 1968 SC 522, where the inability of a buyer to obtain an import licence did not frustrate a contract for the supply of jute, the Court holding that a contract is not frustrated merely because performance has become difficult, and that the party had assumed the risk of obtaining the licence.

4. Where the Principle Yields

Sanctity is a strong principle, not an absolute one. The Act itself identifies the situations in which a validly made contract need not be performed, and Section 37 expressly preserves them by the words 'unless such performance is dispensed with or excused under the provisions of this Act, or of any other law'.

Ground	Provision	Why the principle yields
Supervening impossibility or unlawfulness	Section 56, second paragraph	Performance has become impossible or unlawful by an event the promisor could not prevent; the contract becomes void and the foundation of the bargain has gone
Consent not free	Sections 19 and 19A	The bargain was not genuinely assented to. Sanctity presupposes a promise freely made, so coercion, undue influence, fraud and misrepresentation make the contract voidable
Unlawful object or consideration	Section 23	The law will not lend its machinery to enforce an agreement that is forbidden, fraudulent, immoral or opposed to public policy, however deliberately it was made
Discharge by agreement	Sections 62 to 67	The parties who made the contract may unmake it by novation, rescission or alteration. Sanctity protects the parties' will and therefore yields to it
Breach by the other party	Sections 39 and 53 to 55	A party is not held to a bargain the other side has repudiated, prevented or failed to perform within an essential time
Statutory intervention	Consumer Protection Act, 2019; Section 16(3) and Section 23	Where a term is unconscionable or unfair and imposed through unequal bargaining power, enforcement may be refused

4.1 Force majeure clauses and Section 32

A point of frequent confusion is the relationship between a contractual force majeure clause and Section 56. They operate in different registers. A force majeure clause is a term of the contract, and a contract that provides for rights and obligations on the happening of a collateral event is a contingent contract governed by Section 32. Section 56 is a rule of positive law that operates from outside the contract and dissolves it. Energy Watchdog settles the order of inquiry: the court construes the clause first, and if the clause covers the situation, Section 56 is not reached at all. This preserves sanctity in its strongest form, because it means the parties' own provision for disaster displaces the general law.

5. The Principle in Arbitration and Commercial Adjudication

Sanctity has a procedural dimension as well. An arbitral tribunal derives its authority from the contract and cannot decide in disregard of its terms; an award that ignores an express provision has been treated as patently illegal and liable to be set aside under Section 34 of the Arbitration and Conciliation Act, 1996. In the field of government tenders and public contracts, courts exercising jurisdiction under Article 226 have repeatedly declined to rewrite commercial terms, confining review to the fairness of the process rather than the wisdom of the bargain. The consistent theme is that the parties' allocation of risk is the primary text and the adjudicator's task is to apply it.

⚠ Sanctity is a reason for restraint, not a bar to relief

It is a mistake to treat sanctity of contract as an answer to every claim. Where a statutory provision applies, the statute prevails over the parties' stipulation: an agreement to oust Section 28, to contract out of Section 23, or to fix damages beyond what Section 74 permits is ineffective however clearly expressed. Sanctity operates within the space the law leaves to party autonomy, and cannot be used to enlarge that space.

6. The Position Stated Shortly

Pacta sunt servanda means agreements must be kept; it descends from Roman and canon law and appears in public international law in Article 26 of the Vienna Convention on the Law of Treaties, 1969.
Section 37 is the nearest statutory expression of the principle, requiring performance unless dispensed with or excused by law.
Section 73 supports it by measuring damages against the promised performance rather than the loss actually incurred in reliance.
Explanation 2 to Section 25 confirms that courts do not assess the adequacy of the bargain.
A court construes a contract and does not make a new one for the parties, per General Assurance Society v. Chandmull Jain.
Onerous performance is not an excuse: Alopi Parshad (1960), Naihati Jute Mills (1968), Energy Watchdog (2017).
Where the parties have allocated a risk by a force majeure clause, the clause governs under Section 32 and Section 56 has no application.
The principle yields to impossibility under Section 56, to absence of free consent, to unlawfulness under Section 23, to discharge by agreement, to breach by the other side, and to statutory control of unfair terms.

7. Related Topics and Provisions

Topic or provision	Connection
Contract Law and Freedom of Contract	The formation-stage counterpart of this enforcement-stage principle
Indian Contract Act, 1872: Introduction, Object and Scope	Certainty and security of transactions as objects of the Act
Scheme of the Indian Contract Act, 1872	Where Sections 37, 56 and 73 sit in the structure
Section 32, Indian Contract Act	Contingent contracts and force majeure clauses
Section 37, Indian Contract Act	The obligation of parties to perform
Section 56, Indian Contract Act	Supervening impossibility and frustration
Sections 62 to 67, Indian Contract Act	Discharge by novation, rescission and alteration
Section 73, Indian Contract Act	Compensation for loss caused by breach
Section 34, Arbitration and Conciliation Act, 1996	Setting aside an award that disregards the contract