No — a purely verbal “agreement” will not work as a prenup. A prenuptial agreement needs to be in writing and properly signed to carry any weight in England & Wales. A promise made over dinner, however sincere, is not something a court can give effect to — because there is no record of what was agreed, no evidence of disclosure or advice, and nothing to show either of you truly understood the consequences.
Why writing matters so much
A prenup is normally executed as a deed — a formal written document, signed by each partner in front of an independent witness. That formality is not bureaucracy for its own sake; it is what makes the agreement provable and reliable years later. A spoken understanding fails on every front that gives a prenup its weight:
- No record of the terms. Memories differ, and there is no document to point to.
- No evidence of disclosure. Nothing shows what each partner knew about the other’s finances.
- No proof of advice. Nothing shows either of you understood your rights.
- No signatures or witness. Nothing shows you both freely committed to it.
Without those, a court has nothing concrete to give weight to (see are prenups legally binding? and what makes a prenup invalid).
The conversation still matters — it just is not the agreement
None of this means talking about money before marriage is pointless — quite the opposite. An honest conversation about finances and expectations is the essential first step, and often the hardest one (see how to talk about a prenup and money talks before marriage). The point is simply that the conversation has to be turned into a proper written agreement to have legal effect. The talk is the beginning; the signed deed is what counts.
What you need instead of a verbal understanding
To have any effect, a prenup must be written down, set out both partners’ finances, record fair terms, and be signed properly as a deed with a witness. That is exactly what a structured agreement gives you — and it need not be expensive or complicated (see what to include in a prenup, how to get a prenup and how to sign a prenup).
A worked example of why a spoken promise fails
Imagine a couple who, before marrying, agree over dinner that “whatever you bring in stays yours”. Ten years on the marriage ends. One partner remembers the promise clearly; the other insists it was loose talk, never meant to bind them, and points out that their finances have thoroughly merged since. There is no document, no record of what each of them actually owned back then, and no proof either took advice. A court has nothing concrete to hold on to, so it decides the finances under the ordinary law as if no agreement existed (see what happens without a prenup). The very certainty the couple thought they had created evaporates precisely because it was never written down.
Why writing protects both of you, not just one
It is tempting to see the formality of a written prenup as protecting the wealthier partner, but a proper document protects both sides. The written agreement records what each person disclosed, so neither can later be accused of hiding assets; it captures the terms so there is no dispute about what was promised; and it shows both took advice, so neither can claim they were kept in the dark. A vague spoken understanding, by contrast, can be remembered quite differently by two people acting in good faith. Putting it in writing is not about mistrust — it is about sparing both of you an argument years later when memories have drifted (see full and frank disclosure and how to make a prenup fair).
Turning the conversation into a real agreement
If you have talked it through and reached an understanding, the good news is that turning that into a proper agreement is straightforward:
- Write down what you agreed — the terms, in plain language (see what to include).
- Exchange disclosure — each set out your assets, income and debts.
- Take advice — each partner reviews the document with their own adviser.
- Sign it as a deed, witnessed, well before the wedding (see how to get a prenup).
None of this is expensive or drawn out, and it converts a fragile spoken promise into something a court can actually give weight to.
What the leading case actually asks for
It helps to see why writing is not just a nicety. The modern approach to nuptial agreements comes from Radmacher v Granatino (2010), in which the Supreme Court said a court should give effect to an agreement that was freely entered into by each party with a full appreciation of its implications, unless in the circumstances it would not be fair to hold them to it. Read that test back against a dinner-table promise and it collapses at once. How does anyone show what was “freely entered into” when there is no signed document? How is a “full appreciation of the implications” demonstrated with no disclosure and no advice? A prenup earns its weight by producing evidence on each of those points; a conversation produces none. That is the real reason a spoken understanding cannot do the job, however genuine it was (see are prenups legally binding?).
Could a verbal agreement ever count as evidence?
There is a narrow, honest answer here worth giving. A conversation is not a prenup, but in a divorce a court looks at all the circumstances, and evidence that a couple discussed and understood how they wanted their money handled is not completely irrelevant. The trouble is that it is weak, disputed and unreliable — one partner remembers a firm agreement, the other a passing remark, and there is nothing to break the tie. You cannot plan your family’s financial security around evidence that may be waved away in a sentence. So while a spoken understanding is not literally worthless, it is nowhere near a substitute for a properly executed agreement, and it should never be relied on as one (see what makes a prenup invalid).
What about texts, emails and notes?
Some couples assume that because they put something in a message, they have satisfied the “in writing” requirement. Unfortunately a string of texts or an email exchange is not the same as an agreement executed as a deed. Messages may help show that a conversation happened and roughly what was said, but they are usually incomplete, informal, and lack signatures, a witness and any evidence of disclosure or advice. Treating them as a prenup would be a serious mistake. If you have reached an understanding by message, the sensible next step is to convert it into a proper document rather than leave it scattered across a chat thread (see how to get a prenup).
Why this catches so many couples out
The gap between a heartfelt promise and a legally weighty agreement is exactly where people come unstuck, because in daily life a promise between two people who trust each other feels binding enough. Marriage, though, brings a whole framework of financial claims into being, and the law does not let those claims be signed away casually — precisely because they matter so much (see what happens without a prenup). The formalities that can feel fussy are there to make sure nobody gives up important rights without genuinely understanding what they are doing. Far from being red tape, they are the safeguard that lets a court trust the agreement years later. That is why the honest advice is always the same: have the conversation, then write it down properly (see how to make a prenup fair).
Why a verbal prenup carries no weight
A verbal prenup — a spoken understanding about money before marriage — will not carry weight in England & Wales. A prenup is normally executed as a deed: a written document signed by each partner in front of a witness. A conversation leaves no record of what was agreed, no evidence of financial disclosure or legal advice, and nothing concrete for a court to give effect to. The talk is a good start, but it has to become a proper written agreement to count.
Frequently asked questions
Does a verbal prenup count in court?
No — a prenup must be in writing and signed to carry weight (see are prenups legally binding?).
What makes a prenup valid instead?
Writing, full disclosure, independent advice and proper signing as a deed (see what to include).
Is a written but unsigned prenup any better?
It is a start, but without proper signing as a witnessed deed it is far weaker than a fully executed agreement (see executed as a deed).
Can text messages or emails count as a prenup?
They may evidence a conversation, but they are not a properly executed agreement and should not be relied on as one.
We only shook hands on it — is that binding?
No — a handshake understanding has no formal effect; you need a signed written agreement (see what makes a prenup invalid).
We are already married — is it too late to write it down?
No — you can record your intentions in a postnuptial agreement after the wedding.
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UK Prenup is not a law firm and does not provide legal advice. A prenuptial agreement in England & Wales is not automatically binding, and both partners should take independent legal advice before signing.