Breach of contract in English law

Breach of contract is the central pathology of the law of obligations. Where one party to a binding agreement fails to perform, or performs defectively, or evinces an intention not to perform, the law must provide both a framework for classification and a set of remedies. English law has developed, over several centuries, a sophisticated and nuanced body of doctrine addressing these questions — one which continues to evolve, as the Supreme Court’s landmark judgment in King Crude Carriers SA v Ridgebury November LLC [2025] UKSC 39 vividly demonstrates.

1. The concept of breach

A breach of contract occurs where a party, without lawful excuse, fails to perform or defectively performs any obligation arising under the contract, or evinces an intention not to be bound by the contract or no longer to perform it. The concept is deceptively simple; its application is not.

English law draws a fundamental distinction, articulated most clearly by Lord Diplock in Photo Production Ltd v Securicor Transport Ltd [1980] AC 827, between primary obligations (those which each party has undertaken to perform) and secondary obligations (those which arise by operation of law upon breach, principally the obligation to pay damages). As Lord Diplock put it at 848–849:

“Every failure to perform a primary obligation is a breach of contract. The secondary obligation on the part of the contract breaker … is to pay monetary compensation to the other party for the loss sustained by him in consequence of the breach.”

This distinction is foundational. It underpins the modern understanding of the entire law of breach, from the classification of terms to the assessment of remedies.

2. Historical development

2.1 Origins in the forms of action

The modern law of breach of contract emerged from the old forms of action, particularly assumpsit, which by the sixteenth century had established itself as the principal vehicle for enforcing promises. The earlier forms – covenant (which required a deed) and debt (which was confined to claims for fixed sums) – were progressively eclipsed. As Diplock LJ observed in Hong Kong Fir Shipping Co Ltd v Kawasaki Kisen Kaisha Ltd [1962] 2 QB 26 at 62–65, the classification of contractual terms as conditions and warranties was itself shaped by the procedural requirements of these earlier actions: under the old pleading rules, a claimant had to aver performance of all “conditions precedent” to the defendant’s obligation.

2.2 The condition–warranty distinction

By the eighteenth century, Lord Mansfield’s judgment in Boone v Eyre (1777) 1 H Bl 273n had swept away the arid technicalities of the older approach. He drew a distinction between covenants which “go to the whole of the consideration” (conditions, the breach of which excuses further performance) and those which “go only to a part, where a breach may be paid for in damages” (warranties). This binary classification was later adopted by Parliament in the Sale of Goods Act 1893 (now the Sale of Goods Act 1979), which defined “conditions” and “warranties” as terms whose breach gives rise, respectively, to a right to treat the contract as repudiated or merely to a claim in damages (sections 11–14).

2.3 The emergence of innominate terms

The rigid condition–warranty dichotomy proved unsuitable for complex modern contracts. In the seminal decision of Hong Kong Fir Shipping Co Ltd v Kawasaki Kisen Kaisha Ltd [1962] 2 QB 26, the Court of Appeal introduced a third category: the innominate term (or intermediate term). Diplock LJ’s reasoning was that many contractual obligations — seaworthiness being the paradigm – are of such complexity that it cannot be said in advance whether every breach will, or no breach will, be sufficiently serious to justify termination. The proper approach is to examine the consequences of the breach and ask whether it has deprived the innocent party of “substantially the whole benefit which it was the intention of the parties as expressed in the contract that he should obtain.”

This approach was confirmed by the House of Lords in Cehave NV v Bremer Handelsgesellschaft mbH (The Hansa Nord) [1976] QB 44, though it exists alongside, and does not displace, the condition–warranty distinction where the parties have clearly allocated a term to one of those categories or where statute so provides: see Bunge Corporation v Tradax SA [1981] 1 WLR 711 (HL), where time stipulations in mercantile contracts were held to be conditions.

3. Types of breach

English law recognises three principal categories of breach, each with distinct doctrinal characteristics and consequences.

3.1 Actual breach

An actual breach occurs at the time fixed for performance (or, where no time is fixed, within a reasonable time), when the promisor either:

• fails to perform at all (total non-performance); or
• performs defectively – that is, renders a performance which does not conform to the contractual specification.

The consequences depend on the classification of the term breached and, for innominate terms, on the gravity of the breach (discussed below at section 4).

3.2 Anticipatory breach

The doctrine of anticipatory breach – or anticipatory repudiation- was established in the landmark case of Hochster v De La Tour (1853) 2 E & B 678, in which the defendant engaged the claimant as a courier for a journey commencing 1 June, but on 11 May informed him that his services were no longer required. The court held that the claimant could sue immediately, without waiting for the date of performance.

The doctrine was confirmed and refined in Frost v Knight (1872) LR 7 Exch 111, and its modern scope was addressed by Devlin J in Universal Cargo Carriers Corporation v Citati [1957] 2 QB 401, who identified two forms of anticipatory breach:

1. Express repudiation: a clear and absolute declaration that the party will not perform.
2. Repudiation by conduct: where the party’s actions render future performance impossible or demonstrate an unequivocal intention not to be bound.

The test is stringent. In Woodar Investment Development Ltd v Wimpey Construction (UK) Ltd [1980] 1 WLR 277, the House of Lords emphasised that the repudiating party must have “evinced an intention” not to be bound. Mere expressions of doubt, requests to renegotiate, or even a mistaken reliance on a contractual right to terminate will not suffice unless they objectively demonstrate an absolute refusal to perform: see also Federal Commerce & Navigation Ltd v Molena Alpha Inc [1979] AC 757.

Where an anticipatory breach occurs, the innocent party faces an election:

• Accept the repudiation: treat the contract as at an end and sue immediately for damages, assessed (generally) as at the date of acceptance.
• Affirm the contract: refuse to accept the repudiation, hold the contract open, and insist upon performance. The controversial decision of the House of Lords in White & Carter (Councils) Ltd v McGregor [1962] AC 413 held that the innocent party may continue to perform and claim the contract price, subject to the important qualifications that performance must not require the co-operation of the repudiating party, and the innocent party must have a “legitimate interest” in performing rather than claiming damages (a limitation recognised by Lord Reid himself in White & Carter and developed in subsequent cases such as The Alaskan Trader [1984] 1 All ER 129).

Once the innocent party has unequivocally accepted the repudiation, the repudiating party can no longer retract it: Avery v Bowden (1855) 5 E & B 714. However, if the innocent party affirms, the repudiating party may, in principle, withdraw its repudiation before acceptance and resume performance.

3.3 Repudiatory breach

A repudiatory breach is a breach of such gravity that it entitles the innocent party to treat the contract as at an end. It arises in three principal circumstances:

1. Breach of a condition: any breach of a term classified as a condition gives rise to a right of termination, regardless of the severity of the actual consequences (Bunge Corporation v Tradax SA [1981] 1 WLR 711).
2. Sufficiently serious breach of an innominate term: where the breach deprives the innocent party of substantially the whole benefit of the contract (Hong Kong Fir, above).
3. Renunciation: where a party by words or conduct evinces an intention to abandon or refuse to perform the contract (Freeth v Burr (1874) LR 9 CP 208).

An important recent development was the Court of Appeal’s decision in Kulkarni v Gwent Holdings Ltd [2025] EWCA Civ 1206, which confirmed that repudiatory breaches are not necessarily irremediable. The court held that whether a breach is “capable of remedy” within a contractual cure provision is a “practical rather than technical” question, in which common law rules of repudiation have no place. The court endorsed the test from F L Schuler AG v Wickman Machine Tool Sales Ltd [1974] AC 235 that “remedy” means to “cure so that matters are put right for the future.” This is a significant point for contract drafters: if certain breaches are intended to trigger immediate and irreversible consequences, this must be stated in unequivocal terms.

4. The consequences of breach: termination and its limits

4.1 Termination is prospective, not retrospective

The effect of termination for breach was definitively settled by Lord Wilberforce in Johnson v Agnew [1980] AC 367 and Lord Diplock in Photo Production Ltd v Securicor Transport Ltd [1980] AC 827. Termination does not rescind the contract ab initio; it is prospective only, releasing the parties from further performance of their primary obligations whilst preserving accrued rights and the secondary obligation to pay damages. As Lord Diplock stated:

“The unperformed primary obligations of the party in default are replaced by a secondary obligation to pay damages.”

This principle was reinforced in Hyundai Heavy Industries Co Ltd v Papadopoulos [1980] 1 WLR 1129, where the House of Lords held that acceptance of a repudiatory breach did not destroy the buyer’s accrued obligation to pay instalments that had fallen due before termination.

4.2 The party in breach cannot rely on his own wrong

The ancient maxim that no man shall take advantage of his own wrong has found recurrent application in breach of contract cases. In Alghussein Establishment v Eton College [1988] 1 WLR 587, the House of Lords held that a party cannot claim a contractual benefit resulting from his own wilful default. Lord Diplock had earlier expressed the principle as a rule of construction in Cheall v Association of Professional Executive Clerical and Computer Staff [1983] 2 AC 180 at 188–189:

“It is to be presumed that it was not the intention of the parties that either party should be entitled to rely upon his own breaches of his primary obligations as bringing the contract to an end.”

However, this principle was significantly clarified in the Supreme Court’s 2025 decision in King Crude Carriers SA v Ridgebury November LLC [2025] UKSC 39 (discussed further below), in which the Court held that the maxim does not operate as a freestanding principle of law permitting “deemed fulfilment” of conditions precedent.

4.3 The wrongful termination trap

A party who purports to terminate for breach when not entitled to do so may itself commit a repudiatory breach, as illustrated by One Fish v Iceland Foods Ltd [2017]. The decision to accept a repudiation must therefore be taken with great care. As Lord Sumption observed extra-judicially, the law places a premium on accurate identification of the character of the breach before the election is made.

5. The Mackay v Dick controversy and the Supreme Court’s resolution in 2025

A particularly vexed question in the law of breach has been the status of the so-called Mackay v Dick principle – the proposition that where a party wrongfully prevents the fulfilment of a condition precedent to its own debt obligation, that condition is deemed to be fulfilled.

5.1 The historical controversy

The question originated in the Scottish case of Mackay v Dick (1881) 6 App Cas 251. Lord Watson reasoned that where a condition precedent to payment had not been fulfilled because of the buyer’s own default, the condition should be treated as satisfied – a doctrine “borrowed from the civil law.” Lord Blackburn took a different route, relying on an implied duty of co-operation.

In the decades that followed, various English decisions appeared to lend support to a deemed fulfilment principle: Hotham v East India Company (1787) 1 TR 639; Panamena Europea Navegacion v Frederick Leyland & Co [1947] AC 428; Cory v London Residuary Body (1990, unreported, CA); and Compagnie Noga d’Importation et d’Exportation SA v Abacha (No 3) [2002] CLC 207. But scepticism was also voiced: Scott J in Thompson v ASDA-MFI Group plc [1988] 1 Ch 241 at 266 declared that “[t]he fictional fulfilment of conditions precedent … may be principles of the civil law, but they are not principles of English law,” and Millett LJ in Little v Courage Ltd (1994) 70 P & CR 469 agreed.

5.2 King Crude Carriers SA v Ridgebury November LLC [2025] UKSC 39

The Supreme Court resolved this long-standing controversy in its unanimous judgment delivered by Lord Hamblen and Lord Burrows. The case arose from three contracts for the sale of vessels on the Norwegian Saleform 2012. The buyers failed to provide the documentation necessary for opening an escrow account, thereby preventing fulfilment of a condition precedent to the accrual of the deposit. The sellers argued that the condition should be “deemed fulfilled,” entitling them to claim the deposits as debts.

The Supreme Court held decisively that the Mackay v Dick principle of law is not part of English law. Its reasoning included six main pillars:

1. Lord Watson relied on a civil law doctrine, not English authority.
2. English cases did not speak with one voice.
3. Applying the principle to sale of goods contracts (where payment depends on the passing of property) would produce “extraordinary” results, as McCardie J had recognised in Colley v Overseas Exporters [1921] 3 KB 302.
4. The various formulations – “deemed fulfilment,” “deemed waiver,” “quasi-estoppel” – are all fictions, which “tend to obscure transparent reasoning and, wherever possible, should be removed.”
5. English contract law proceeds on the basis of express and implied terms and their proper interpretation, not fictional fulfilment.
6. The consequence of rejection does not produce injustice: the innocent party retains a remedy in damages.

The Court further rejected arguments that the same result could be achieved by contractual interpretation or implied terms, holding that any implied term making the deposit payable directly to the sellers (rather than into the agreed escrow account) would fundamentally rewrite the parties’ bargain.

This decision is of considerable practical importance. As Richard Dickman of Pinsent Masons observed, it “is a warning to businesses to ensure that the contract is drafted in such a way that it sets out an agreed sum and, crucially, a trigger for payment to allow the innocent party to bring a debt claim within the express or implied terms of the contract.”

6. Remedies for breach of contract

6.1 Damages: the governing principle

The fundamental measure of damages for breach of contract was laid down by Parke B in Robinson v Harman (1848) 1 Exch Rep 850 at 855:

“The rule of the common law is, that where a party sustains a loss by reason of a breach of contract, he is, so far as money can do it, to be placed in the same situation, with respect to damages, as if the contract had been performed.”

This is the expectation interest — the claimant is entitled to the benefit of the bargain. It is to be contrasted with the reliance interest (recovery of wasted expenditure, as in Anglia Television Ltd v Reed [1972] 1 QB 60), and with restitutionary measures aimed at reversing unjust enrichment.

6.2 Remoteness of damage

Not all losses flowing from a breach are recoverable. The rule on remoteness was established in Hadley v Baxendale (1854) 9 Exch 341, which laid down a two-limb test. Losses are recoverable only if they:

1. arise naturally from the breach “according to the usual course of things” (the first limb); or
2. may reasonably be supposed to have been in the contemplation of both parties, at the time the contract was made, as the probable result of the breach — where the defendant has knowledge of special circumstances (the second limb).

The test was refined by the House of Lords in Koufos v C Czarnikow Ltd (The Heron II) [1969] 1 AC 350, which held that the requisite degree of probability is that the loss was “not unlikely” — a standard “considerably less than an even chance but nevertheless not very unusual and easily foreseeable.” This was helpfully restated by the Privy Council (sitting as five Supreme Court Justices) in Attorney General of the Virgin Islands v Global Water Associates Ltd [2020] UKPC 18, which summarised the position in five propositions including the critical point that the test is objective: “what the defendant must be taken to have had in his contemplation, rather than what he actually contemplated.”

In Transfield Shipping Inc v Mercator Shipping Inc (The Achilleas) [2009] 1 AC 61, Lord Hoffmann proposed that the remoteness inquiry should focus not simply on foreseeability but on whether the defendant had assumed responsibility for the type of loss in question. This “assumption of responsibility” approach was endorsed by Lord Hope but doubted by other members of the House of Lords. Subsequent decisions have treated it as a potential additional ground for limiting recovery in exceptional cases rather than a replacement for the Hadley v Baxendale test: see, e.g., Supershield Ltd v Siemens Building Technologies FE Ltd [2010] EWCA Civ 7.

6.3 Mitigation

The duty to mitigate requires the claimant to take all reasonable steps to minimise his loss (British Westinghouse Electric and Manufacturing Co Ltd v Underground Electric Railways Co of London Ltd [1912] AC 673). The claimant cannot recover for losses which could reasonably have been avoided. Conversely, the cost of reasonable mitigation steps is recoverable.

The Supreme Court in Globalia Business Travel SAU v Fulton Shipping Inc of Panama (The New Flamenco) [2017] UKSC 43 addressed the important question of when benefits obtained by the claimant in consequence of the breach should be brought into account, holding that the “essential question is whether there is a sufficiently close link of causation” between the benefit and the loss.

6.4 The distinction between debt and damages

The distinction between a claim in debt and a claim in damages is of considerable practical significance. A debt claim – for a liquidated sum due under the contract — does not require proof of loss, is not subject to the duty to mitigate, and is not assessed on the basis of the claimant’s expectation interest. It is simply a claim for the price agreed.

As the Supreme Court emphasised in King Crude Carriers [2025] UKSC 39 at [14]:

“It is trite law that, at least in general, a debt claim entitles the creditor to the payment of the sum promised irrespective of whether the creditor has suffered a loss of bargain or whether any loss could reasonably have been mitigated by the creditor.”

This made the distinction between debt and damages pivotal in that case. The sellers’ practical difficulty was that, because vessel prices had risen, they suffered no loss — only nominal damages would have been recoverable. Hence the importance (ultimately unsuccessful) of their attempt to characterise the claim as one in debt.

6.5 Specific performance and injunctions

Specific performance is an equitable remedy, discretionary in nature, and available only where damages would be an inadequate remedy. It is most commonly granted in relation to contracts for the sale of land, but may also be available in respect of unique goods or where the subject matter is otherwise irreplaceable: Beswick v Beswick [1968] AC 58. The court will not grant specific performance where constant supervision would be required (Co-operative Insurance Society Ltd v Argyll Stores (Holdings) Ltd [1998] AC 1), nor where it would cause disproportionate hardship.

Injunctions may be granted to restrain breach of a negative covenant in a contract, even where specific performance of the positive obligation would not be ordered: Doherty v Allman (1878) 3 App Cas 709.

6.6 Agreed remedies: liquidated damages and penalties

Parties frequently include clauses specifying the sum payable upon breach. Such clauses are enforceable as liquidated damages provided they do not constitute penalties. The test for penalties was fundamentally restated by the Supreme Court in Cavendish Square Holding BV v Makdessi [2015] UKSC 67 (heard jointly with ParkingEye Ltd v Beavis), which departed from the old Dunlop Pneumatic Tyre Co Ltd v New Garage and Motor Co Ltd [1915] AC 79 test of whether the sum was a “genuine pre-estimate of loss.” The new test is:

1. Is the clause a secondary obligation engaged on breach of a primary contractual obligation?
2. If so, does it impose a detriment which is out of all proportion to any legitimate interest of the innocent party in the performance of the primary obligation?

Only if the clause is extravagant, exorbitant, or unconscionable in comparison to the legitimate interest protected will it be struck down as a penalty.

In Houssein v London Credit Ltd [2024] EWCA Civ, the Court of Appeal emphasised that courts must carefully apply this two-stage test: first identifying the legitimate interest, and then separately considering whether the provision is extortionate — not merely looking for a “justification” for the higher rate.

7. Modern developments and continuing themes

7.1 Force majeure and breach

The interplay between force majeure clauses and breach was considered by the Supreme Court in RTI Ltd v MUR Shipping BV [2024] UKSC 18, which held that a party relying on a force majeure clause is not required, as part of its “reasonable endeavours” obligation, to accept an offer of non-contractual performance (in that case, payment in euros rather than the contractually stipulated US dollars). Lord Hamblen, delivering the leading judgment, emphasised that “reasonable endeavours” should not be allowed to “ride roughshod over the required contractual performance” and that freedom of contract includes “freedom not to contract – which includes freedom not to accept the offer of a non-contractual performance.”

7.2 Exclusion and limitation clauses

The effectiveness of clauses excluding or limiting liability for breach remains a major area of commercial practice. In Costcutter Supermarkets Group Ltd v Vaish [2024], the High Court confirmed the important distinction between primary obligations (such as the obligation to pay for goods received) and secondary obligations (such as liability to pay damages for breach). A broadly drafted limitation clause was held not to excuse performance of the primary obligation to pay.

7.3 Contractual interpretation and breach

The modern approach to contractual interpretation, articulated in Arnold v Britton [2015] UKSC 36 and Wood v Capita Insurance Services Ltd [2017] UKSC 24, applies equally to the construction of breach-related provisions – including termination clauses, cure provisions, and conditions precedent. Courts adopt an iterative process, considering the natural meaning of the words in their documentary and commercial context. As the Supreme Court observed in King Crude Carriers [2025] at [67]:

“English contract law in this area proceeds on the basis of the terms of the contract, express and implied, and their proper interpretation rather than by way of fictional fulfilment of a condition precedent. This is consistent with the importance which English law attaches to freedom of contract.”

8. Summary: a framework for analysis

The following analytical framework may assist practitioners and students in approaching problems of breach of contract:

Step	Question	Key authorities
1. Identify the term breached	Is it a condition, warranty, or innominate term?	Hong Kong Fir [1962]; Bunge v Tradax [1981]; SGA 1979 ss 12–15
2. Classify the breach	Is it actual or anticipatory? Express repudiation or by conduct?	Hochster v De La Tour (1853); Woodar v Wimpey [1980]
3. Assess gravity	Does the breach deprive the innocent party of substantially the whole benefit?	Hong Kong Fir [1962]; Photo Production [1980]
4. Election	Accept the repudiation and terminate, or affirm?	White & Carter v McGregor [1962]; Johnson v Agnew [1980]
5. Consider remediability	Is there a contractual cure provision? Is the breach capable of remedy?	Kulkarni v Gwent Holdings [2025]; Schuler v Wickman [1974]
6. Assess damages	What is the expectation interest? Is the loss too remote? Has the claimant mitigated?	Robinson v Harman (1848); Hadley v Baxendale (1854); The Heron II [1969]
7. Debt vs damages	Has the condition precedent to the debt obligation been fulfilled?	King Crude Carriers v Ridgebury [2025] UKSC 39
8. Penalties	Is any agreed damages clause enforceable?	Cavendish Square v Makdessi [2015] UKSC 67

9. Conclusion

The law of breach of contract in England and Wales is both deeply rooted in history and dynamically responsive to contemporary commercial needs. From the old forms of action to the Supreme Court’s 2025 rejection of the Mackay v Dick principle of deemed fulfilment, the trajectory has been consistently towards greater transparency of reasoning, fidelity to the language of the bargain, and rejection of legal fictions.

The practitioner advising on breach of contract must attend simultaneously to the classification of terms, the gravity of the breach, the availability and desirability of termination, and the quantification of loss. The researcher will find in this area a rich seam of doctrinal debate – on the boundaries of the innominate term, the scope of anticipatory breach, the proper role of the “assumption of responsibility” test for remoteness, and the appropriate limits of the penalty doctrine. The student will discover that mastery of breach of contract requires not merely the learning of rules but the cultivation of judgment: the ability to weigh competing considerations and to advise, often under time pressure, on the most prudent course.

What unites all three audiences is the recognition that breach of contract is not a static body of law. It is, as the common law has always been, a living system — one which continues to grow, refine itself, and occasionally, as Lord Hamblen and Lord Burrows put it in King Crude Carriers, to bury its ancestors.

See also: Breach of contract cases

Principal sources and further reading

• Chitty on Contracts, 35th edn (Sweet & Maxwell, 2024), especially Part 8 (Performance and Breach) and Part 9 (Remedies)
• Treitel, The Law of Contract, 16th edn (Sweet & Maxwell, 2025), chapters 17–22
• Lewison, The Interpretation of Contracts, 8th edn (Sweet & Maxwell, 2023)
• Peel, Treitel on the Law of Contract, 16th edn (Sweet & Maxwell, 2025)
• McGregor on Damages, 21st edn (Sweet & Maxwell, 2021)
• English, Discharge of Contractual Obligations (Hart, 2025)
• Lord Burrows, Remedies for Torts, Breach of Contract, and Equitable Wrongs, 4th edn (OUP, 2019)
• Strong & Herring, Sale of Ships, 3rd edn (Sweet & Maxwell, 2016)
• King Crude Carriers SA v Ridgebury November LLC [2025] UKSC 39 — full judgment available at supremecourt.uk