Intention to create legal relations is what separates a binding contract from a friendly promise or a family arrangement. It is tested objectively — by what the parties' words and conduct would convey to a reasonable person, not by their private, unexpressed states of mind (Smith v Hughes (1871) LR 6 QB 597 Persuasive (Eng)).
Social and domestic agreements
Agreements between family members or friends are presumed not to be intended as legally binding. The classic authority is Balfour v Balfour [1919] 2 KB 571 Persuasive (Eng), where a husband's promise of a monthly allowance to his wife was held unenforceable — a domestic arrangement, not a contract. Irish courts apply the same approach; in Coleman v Mullen Irish a family/friendship arrangement was treated as lacking the intention to create legal relations.
But the presumption is rebuttable. Where the relationship has broken down (for example, spouses who have separated and are dealing at arm's length), or where one party has clearly relied on the promise, the courts are far more willing to find that legal relations were intended.
Commercial agreements
In a business or commercial context the presumption flips: the parties are presumed to intend legal consequences, and the burden of rebutting that is heavy. It can be displaced by clear words — for example an express "honour clause" stating that the arrangement is binding in honour only and not intended to be legally enforceable.
Why it matters
Intention is a distinct, essential ingredient of a contract. A promise can have every other element — a clear offer, acceptance and even consideration — and still fail if a court concludes the parties never intended to be legally bound. Spotting which presumption applies, and whether the facts rebut it, is usually the first move in an enforceability problem.
The full, exam-ready version
Enforceability: intention to create legal relations, consideration, promissory estoppel and privity — with the full case table, worked problems and a model-answer skeleton. Checked against the primary sources.
or browse all modules →Frequently asked questions
What is intention to create legal relations?
It is the requirement that the parties intended their agreement to be legally binding. Without it, even an agreement supported by consideration is not an enforceable contract.
Are family agreements legally binding?
Usually not — social and domestic agreements are presumed not to be intended as legally binding (Balfour v Balfour; Coleman v Mullen). The presumption can be rebutted, for example where spouses have separated or a party has relied on the promise.
Is the test subjective or objective?
Objective. The court asks what the parties' words and conduct would convey to a reasonable person, not their private intentions (Smith v Hughes).