In Balfour v Balfour [1919] 2 KB 571, the English Court of Appeal held that a husband’s verbal promise to pay his wife £30 a month while she remained in England for her health was not an enforceable contract. The reason: promises made between spouses living in an ordinary domestic relationship are presumed not to be intended to create legal relations, and without that intention there is no contract to enforce.
What Happened Between the Balfours
Mr. Balfour was a government official posted in Ceylon. In 1915, he and his wife traveled to England during a period of leave. When it was time to return to Ceylon, doctors advised Mrs. Balfour to stay behind for health reasons. Before her husband left, he verbally agreed to send her £30 each month to cover her living costs.
The arrangement worked for a while. Then the marriage deteriorated, the payments stopped, and Mrs. Balfour sued to recover what she said she was owed under the promise.
How the Case Was Decided
The trial court sided with Mrs. Balfour, treating the promise as an enforceable obligation. Mr. Balfour appealed. Three judges of the Court of Appeal reviewed the promise and the state of the marriage at the time it was made, and reversed. No contract existed, they held, and the husband was not bound to keep sending the allowance.
Atkin LJ and the Intention to Create Legal Relations
Lord Justice Atkin gave the reasoning that turned this case into a fixture of contract law. Most agreements between spouses, he explained, are not meant to carry legal consequences. They concern domestic matters, and the parties do not expect a courtroom to be involved if a promise is broken. The law therefore presumes that social and domestic promises do not create binding contracts.
Atkin also raised a practical concern. If every promise between a husband and wife were treated as a contract, the courts would be flooded with private household disputes they were never built to resolve. Family life runs on trust, not on the threat of litigation.
Intention to create legal relations sits alongside the other requirements of a contract. Without some sign that the parties meant their arrangement to have legal force, it stays a social promise. Mrs. Balfour offered no evidence that either she or her husband viewed the £30 as a formal commercial deal, so the agreement fell short of an enforceable contract.
When a Promise Between Family Members Can Be Binding
The presumption against enforceability is not absolute. Certain evidence can show that a family agreement really was intended to have legal weight.
The State of the Relationship
Timing matters. When a couple is already separated, or in the process of a permanent split, courts are more willing to treat their promises as binding. At that point the parties are negotiating their futures as independent people rather than running a shared household, and the domestic presumption loses much of its force.
Formalities
Formalities signal seriousness. A deed, for example, has to follow specific rules to be valid: it must be clear on its face that it is a deed, and it must be signed in front of a witness.1Law of Property (Miscellaneous Provisions) Act 1989. Law of Property (Miscellaneous Provisions) Act 1989 § 1 A significant financial sacrifice or a transfer of property can also point away from a casual domestic gesture, and where one person has relied on a promise to their detriment a court may reach for other legal doctrines to intervene.
Certainty of Terms
Vague promises of support are hard to enforce. Specific amounts, clear dates, a defined duration, and stated consequences for non-payment give a court the structure it needs to identify a real commitment and to move the arrangement out of the shadow of Balfour.