If you have seen the term "antenuptial agreement" and wondered whether it differs from a prenup in the UK — relax. They are two names for the same thing, used interchangeably, and the word you choose makes no difference to how the agreement is treated. This short guide explains where each term comes from, the other names you might run into, and what actually determines whether your agreement holds up.
Same document, different word
"Ante" and "pre" both mean before, so an antenuptial agreement and a prenuptial agreement are identical: an agreement made before marriage about how finances would be handled on divorce. "Prenuptial" (or simply "prenup") is the more common term in the UK today. For the full explainer, see what is a prenuptial agreement? and, for a glossary of the surrounding jargon, prenuptial agreement meaning.
Where you might see "antenuptial"
The word "antenuptial" turns up in older legal texts and in some other countries’ legal systems — South Africa and parts of the US, for example, use it routinely. You may also hear "marriage settlement", "premarital agreement" or simply "nuptial agreement". They all point to the same family of agreements, which we map out in nuptial agreements explained.
The other terms in the family
- Prenuptial agreement / prenup — the everyday UK term, made before the wedding.
- Antenuptial agreement — the same thing, older or overseas usage.
- Premarital agreement — the term more common in the United States (see UK vs US prenups).
- Postnuptial agreement / postnup — the equivalent made after the wedding (see postnuptial agreements).
Why the terminology varies
The mix of words is mostly a matter of era and geography. Older English legal writing favoured "antenuptial" and "marriage settlement"; modern practice has settled on "prenup". Some jurisdictions that inherited older legal language still use "antenuptial" as the standard term, which is why couples with an international background sometimes arrive with a different vocabulary. None of it changes the nature of the document. If you are marrying someone from abroad, or married abroad, the relevant questions are about recognition and jurisdiction (see is a UK prenup recognised abroad?), not the name on the cover.
What actually matters
The label is far less important than whether the agreement is made properly — with full disclosure, independent advice and fair terms — which is what gives it weight (see are prenups legally binding?). Whatever you call it, the substance is the same, the same Radmacher principles apply, and the same things belong in it. Spend your energy on the terms and the safeguards, not the wording of the title.
What to do if your documents use different words
Practical confusion sometimes arises when different documents in the same file use different labels — a solicitor’s letter might say "antenuptial", a template "premarital", and your own draft "prenuptial". This is harmless, but for tidiness it is worth being consistent within your own agreement: pick "prenuptial agreement" (the standard UK term) and use it throughout, including in the title and the signing clauses. If you are dealing with an overseas element — a partner from another country, or assets held abroad — the terminology genuinely can differ between systems, and there the important questions are about which country’s law applies and whether the agreement will be recognised (see international prenups and prenups and overseas assets). Within England & Wales, though, consistency of wording is purely cosmetic; it changes nothing about how the agreement is treated.
Antenuptial agreement vs prenup in the UK: any difference?
There is no real difference between an antenuptial agreement and a prenup — "ante" and "pre" both mean before, so both describe an agreement made before marriage. "Antenuptial" turns up in older texts and some other legal systems, while "prenup" is the everyday UK term. You may also see "marriage settlement". Whatever the label, what matters is that it is made properly — with disclosure, advice and fair terms.
Why the two words exist at all
The doubling-up of terms is really an accident of language history. English law borrowed heavily from Latin, and both "ante" and "pre" are Latin prefixes meaning "before" — so lawyers of different eras reached for whichever felt natural. "Antenuptial settlement" was standard in Victorian marriage law, when wealthy families used trusts and settlements to arrange property around a marriage. As plain-English drafting took over in the twentieth century, "prenuptial agreement" — and the breezy shorthand "prenup" — won out. The substance never changed; only the fashion in wording did. That is why you can safely treat the two as identical and ignore anyone who insists there is a hidden distinction.
A quick reference table
| Term | When made | Where you see it |
|---|---|---|
| Prenuptial agreement / prenup | Before the wedding | Everyday UK usage |
| Antenuptial agreement | Before the wedding | Older texts, some overseas systems |
| Premarital agreement | Before the wedding | Mainly the United States |
| Postnuptial agreement / postnup | After the wedding | UK usage |
As the table shows, the only column that actually changes the document is "when made" — and there, the meaningful line is before versus after the wedding, which is the prenup/postnup distinction, not the prenup/antenuptial one (see prenup vs postnup).
The one distinction that does matter
If you are going to worry about terminology, worry about the right thing: timing relative to the wedding. A prenup and an antenuptial agreement are the same because both are made before marriage. What genuinely differs in law is an agreement made after the wedding — a postnuptial agreement — or when a couple is separating, which is a separation agreement. All are still treated on the same Radmacher principles, but the moment you make one can affect the practical weight it carries. Spend your attention there, not on whether to write "ante" or "pre" on the front page.
Other names you might encounter
Beyond "antenuptial" and "premarital", a few other labels float around, and it is worth knowing they all point back to the same core idea. A marriage contract is the everyday phrase in several European systems, where couples routinely choose a "matrimonial property regime" at the point of marrying. A marriage settlement is the older English term rooted in the Victorian practice of settling property in trust around a wedding. In some religious traditions there are parallel documents — such as a ketubah in Jewish practice or a nikah contract in Islamic practice — which serve a related purpose but are not the same as a civil prenup and are treated differently by the courts (see religious contracts vs prenups). If you are drawing on one of these traditions, it is usually sensible to have a civil prenup alongside, so your intentions are recorded in a form English law recognises.
Getting the terminology right in your own paperwork
When it comes to your own agreement, clarity beats cleverness. Whatever you have heard the document called, use a single, plain label — "this prenuptial agreement" — and stick to it throughout, so there is no ambiguity about what the document is. The substance that follows the title is what a court examines: the disclosure schedule, the clauses setting out separate and shared property, the declarations, and the signatures as a deed. A sound service handles this wording for you and keeps it consistent, so you never have to worry about whether "antenuptial" or "prenuptial" is the "correct" word — both are, and the agreement stands or falls on how it was made, not what it is headed (see how to get a prenup).
Don’t let terminology delay you
A surprising number of couples lose time worrying about whether they need an "antenuptial" or a "prenuptial" agreement, or whether a document labelled one way is somehow weaker than the other. It is not — and that time is far better spent on the things that genuinely affect the outcome: gathering your financial disclosure, agreeing fair terms, arranging independent advice for each of you, and leaving enough time to sign well before the wedding (see when to sign a prenup). If you catch yourself stuck on vocabulary, take it as a sign to move on to substance. Whatever the document is called, the route to a strong one is the same (see how to get a prenup).
Antenuptial agreement: FAQs
Is an antenuptial agreement legally binding in the UK?
Same as a prenup — not automatic, but given weight when fair (see are prenups legally binding?).
Which term should I use?
Either; "prenup" is the common UK term today.
Is an antenuptial agreement the same as a premarital agreement?
Yes — "premarital" is simply the more American term (see UK vs US prenups).
What is an antenuptial agreement made after marriage called?
That would be a postnuptial agreement — the same idea, made after the wedding.
Does the choice of word affect how a court treats it?
No — the court looks at how the agreement was made, not what it is called (see what makes a prenup invalid).
My partner is from a country that uses “antenuptial” — does that matter?
Only in that you may need to think about recognition and jurisdiction, not the name (see is a UK prenup recognised abroad?).
Is a “marriage settlement” the same thing?
It is an older term for arrangements made around a marriage; a modern prenup does the same job in plain-English form (see what is a prenuptial agreement?).
Should I be worried if a template calls it an antenuptial agreement?
Not about the name — but do check it includes disclosure and fair terms, which templates often miss (see prenup templates: what to watch for).
Create your prenuptial agreement online
UK Prenup lets couples in England & Wales create a clear, fair prenuptial agreement online from £199, with your document generated instantly as a PDF. See how it works or get started.
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.