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For a contract to be legally binding, the parties must have intended to create legal relations. Without this intention, an agreement — even one supported by offer, acceptance, and consideration — will not be enforceable. This lesson covers the two presumptions (domestic/social and commercial), the key cases, and the rules on contractual capacity that determine who can and cannot enter into binding contracts.
The courts use a system of rebuttable presumptions to determine whether the parties intended their agreement to be legally binding:
| Context | Presumption | Effect |
|---|---|---|
| Domestic and social agreements | No intention to create legal relations | Not legally binding (unless rebutted) |
| Commercial and business agreements | Intention to create legal relations | Legally binding (unless rebutted) |
In domestic and social agreements, the courts presume that the parties did not intend to create legal relations. This presumption can be rebutted if there is evidence to the contrary.
In Balfour v Balfour [1919], a husband working in Ceylon promised to pay his wife £30 per month while she remained in England for health reasons. When the marriage broke down, the wife sued for the money. The Court of Appeal held that the agreement was a domestic arrangement — there was a presumption against legal intention, and it had not been rebutted. The promise was not enforceable.
Lord Atkin stated that agreements between spouses living together in amity are not intended to be legally binding:
"The common law does not regulate the form of agreements between spouses."
However, this presumption is more easily rebutted where the spouses are separated or where the agreement concerns serious financial matters.
In Merritt v Merritt [1970], a husband and wife who had separated agreed that if the wife paid off the mortgage on their jointly-owned house, the husband would transfer his share to her. He signed a written note to this effect. The Court of Appeal held that the agreement was binding — the presumption was rebutted because:
In Simpkins v Pays [1955], a lodger, the homeowner, and the homeowner's granddaughter regularly entered a newspaper fashion competition. They agreed to share any winnings. When the grandmother won, she refused to share. The court held that the agreement was binding — despite the social context, the participation of an outsider (the lodger) and the mutual commitment to share winnings rebutted the presumption.
In Jones v Padavatton [1969], a mother promised to provide financial support for her daughter to study for the Bar examinations. The Court of Appeal held this was a family arrangement without legal intention — the presumption against legal relations had not been rebutted.
| Case | Parties | Binding? | Reason |
|---|---|---|---|
| Balfour v Balfour [1919] | Husband and wife (together) | No | Domestic arrangement; presumption not rebutted |
| Merritt v Merritt [1970] | Husband and wife (separated) | Yes | Separated; written agreement; serious financial matter |
| Simpkins v Pays [1955] | Homeowner, granddaughter, lodger | Yes | Outsider involved; mutual commitment to share |
| Jones v Padavatton [1969] | Mother and daughter | No | Family arrangement; no evidence of legal intention |
graph TD
A["Domestic/Social Agreement"] --> B{"Is the presumption<br/>against legal relations<br/>rebutted?"}
B -->|"Evidence of legal intent:<br/>- Separation (Merritt)<br/>- Written terms<br/>- Outsider involved (Simpkins)<br/>- Serious financial matter"| C["BINDING CONTRACT"]
B -->|"No evidence:<br/>- Spouses in harmony (Balfour)<br/>- Family arrangement (Jones)<br/>- Informal social plan"| D["NOT BINDING"]
style C fill:#27ae60,color:#fff
style D fill:#e74c3c,color:#fff
In commercial agreements, the courts presume that the parties did intend to create legal relations. This presumption can be rebutted, but it is difficult to do so.
In Edwards v Skyways Ltd [1964], an employer promised a redundant pilot an "ex gratia" payment. The employer argued that "ex gratia" meant there was no intention to be legally bound. The court rejected this argument — in a commercial context, the strong presumption is that agreements are intended to be binding. The word "ex gratia" merely meant the employer was not admitting any pre-existing liability, not that the promise was without legal effect.
In Esso Petroleum Co Ltd v Commissioners of Customs and Excise [1976], Esso offered a free World Cup coin with every four gallons of petrol. The House of Lords (by majority) held that there was intention to create legal relations — the offer was made in a commercial context to promote sales, and customers were induced to buy petrol by the prospect of receiving the coins.
The presumption can be rebutted by an express "honour clause" stating that the agreement is not intended to be legally binding.
In Rose and Frank Co v JR Crompton & Bros Ltd [1925], a commercial agreement contained a clause stating: "This arrangement is not entered into as a formal or legal agreement... but is only a definite expression of the purpose and intention of the parties." The House of Lords held that this honour clause effectively rebutted the presumption — the arrangement was not legally binding (though individual orders placed under the agreement were separate binding contracts).
Under s179 of the Trade Union and Labour Relations (Consolidation) Act 1992, collective agreements between employers and trade unions are presumed not to be legally binding unless the agreement is in writing and expressly states that it is intended to be binding.
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