Balfour v Balfour [1919] 2 KB 571 is the English Court of Appeal decision that established the presumption that promises between spouses living in harmony are not intended to be legally binding contracts. A husband promised his wife £30 a month while she stayed in England for her health; when the marriage later broke down and he stopped paying, the court held there was no contract to enforce. The case is the standard authority on intention to create legal relations in a domestic setting.
The Facts of the Case
Mr. Balfour was the Director of Irrigation for the government of Ceylon (now Sri Lanka). In November 1915 he and his wife traveled to England while he was on leave. When the leave ended, Mrs. Balfour’s doctor advised her to stay in England because she had rheumatic arthritis and could not tolerate Ceylon’s tropical climate.1Open Casebook. Balfour v. Balfour
Before sailing back on 8 August 1916, Mr. Balfour verbally promised his wife £30 a month to cover her living expenses until she could rejoin him. Mrs. Balfour later described it this way: “He gave me a cheque from 8th to 31st for £24, and promised to give me £30 per month till I returned.”1Open Casebook. Balfour v. Balfour There was no written document. The couple was on good terms at the time, and payments began as agreed.
The relationship deteriorated. Mr. Balfour eventually wrote to his wife suggesting they remain apart permanently. Mrs. Balfour obtained a decree nisi and sued, arguing the monthly promise was a binding contract her husband had breached. At trial, Sargant J agreed and ruled in her favor, treating her willingness to live on £30 without pursuing further maintenance as consideration.2Sterling Law QLD. Balfour v Balfour 1919 2 KB 571 Mr. Balfour appealed.
What the Court of Appeal Decided
A three-judge panel (Warrington LJ, Duke LJ, and Atkin LJ) unanimously reversed the trial decision. The arrangement was an ordinary domestic understanding between spouses, not a contract.1Open Casebook. Balfour v. Balfour
Atkin LJ delivered the reasoning the case is now known for. Not every agreement is a contract, he observed, even when offer and acceptance are technically present. Two friends who plan a walk have an arrangement, not a contract, and everyday promises between spouses about money and household matters work the same way. The consideration behind them, he wrote, “is that natural love and affection which counts for so little in these cold Courts.”3Lawprof. Balfour v Balfour 1919 2 KB 571
His point was also practical. If courts enforced every promise a spouse made to another spouse, the judiciary would be flooded with cases and would intrude on family life in an unworkable way. “The principles of the common law,” he said, “find no place in the domestic code.”3Lawprof. Balfour v Balfour 1919 2 KB 571 Mrs. Balfour carried the burden of proving that a contract existed, and nothing in the circumstances suggested the couple had intended legal consequences.
The court also rejected the trial judge’s view on consideration. Duke LJ noted that a husband at that time already had the legal right to withdraw his wife’s authority to pledge his credit, so her agreement to forgo further support was not giving up anything she truly held. There was nothing of value flowing from her side.1Open Casebook. Balfour v. Balfour That gave the court a second, independent basis to dismiss the claim.
The Presumption the Case Created
Balfour’s lasting contribution is the presumption that agreements made in a domestic setting are not intended to be legally binding. The presumption is rebuttable. It can be overcome with sufficient evidence, but the starting point favors treating family arrangements as informal.4Australian Contract Law. Balfour v Balfour
The burden sits on the person claiming a contract exists. They must show that both parties, despite their domestic context, actually meant to be legally bound. Casual promises made while a couple is getting along will almost never clear that bar. The rule filters out the enormous volume of everyday family promises before they can become lawsuits.
When the Presumption Can Be Rebutted
The rule does not mean family members can never form binding contracts. The presumption is strongest when the relationship is harmonious. Once a couple is separating or has already separated, courts treat their dealings very differently.
Merritt v Merritt
The clearest counterexample is Merritt v Merritt [1970] 1 WLR 1211. A husband had left his wife for another woman. The couple met outside their matrimonial home, and the husband signed a written note promising that if the wife paid off the remaining mortgage, he would transfer the house into her sole name. She paid off the mortgage. When he refused to transfer the property, she sued.5CaseMine. Merritt v Merritt
The Court of Appeal held the agreement was binding. The decisive point was that the couple had already separated. When spouses negotiate at arm’s length during or after a breakup, the domestic presumption falls away and their agreements are treated more like commercial dealings. The wife’s mortgage payments were clear consideration, and the signed note showed intent. The husband was ordered to transfer the house.5CaseMine. Merritt v Merritt
What Points Toward Legal Intent
Separation is not the only factor courts weigh. Several circumstances can pull a family arrangement into enforceable territory:
- A written and signed document, which signals seriousness a conversation does not.
- Significant financial stakes, such as property transfers, large sums, or business arrangements, rather than everyday household spending.
- Clear and specific terms. Vague promises cut the other way; in Jones v Padavatton [1969], ambiguity about a housing arrangement was one reason the court found no contract.
- Reliance and performance, especially where one party has already paid or acted at real cost.
The underlying question is whether a reasonable outside observer, looking at what the parties said and did, would conclude they meant to create a legal obligation.
Domestic Agreements Compared to Commercial Ones
Balfour makes more sense against the opposite presumption that governs commercial dealings. When businesses strike a deal, the law presumes they intend it to be binding, and a commercial party arguing the arrangement was a casual understanding faces a difficult task. Explicit language is generally needed to opt out. In Rose and Frank Co v JR Crompton and Bros Ltd [1925] AC 445, an “honourable pledge clause” stating the agreement was “not subject to legal jurisdiction” successfully kept a contract from forming.
The two presumptions form a simple framework. Domestic promises are presumed non-binding unless proven otherwise. Commercial promises are presumed binding unless the parties clearly opt out. Balfour sits on one side of that line; almost every business deal sits on the other.
How the Case Is Viewed Today
Balfour v Balfour has been a fixture of contract law teaching across common law jurisdictions for more than a century, and courts still cite it when deciding whether a family arrangement was meant to be legally binding.
The principle has not been adopted identically everywhere. In Australia, there is no automatic presumption against legal intent in domestic agreements. Australian courts place the burden on whichever party claims a contract exists to prove intention objectively, without starting from a presumption in either direction.4Australian Contract Law. Balfour v Balfour
Modern practice has also shifted the ground beneath the case. Separating spouses today routinely sign formal separation agreements drafted with legal advice on both sides, designed from the start to be enforceable. Those documents sit outside the Balfour presumption entirely. The case was always aimed at the informal, unwritten promise between a couple getting along, and that is where it still does its work.