Is a Polygamous Marriage Recognised in the UK?

Polygamous Marriage in the UK: What Is Recognised

Part of: Marriage Annulment

You cannot validly enter a polygamous marriage in England and Wales. A wedding here creates a void marriage where either party already had a living husband, wife or civil partner (Matrimonial Causes Act 1973, s.11(b)). A marriage that another country’s law allowed is a different question. The law here may still recognise it. That recognition decides whether a court can divide money, who inherits, and where the children stand. Whether it applies turns on three facts: where the wedding took place, whether either of you already had a spouse that day, and where each of you belonged in law at the time. Our divorce specialists assist and advise when the answer matters.

This guide covers England and Wales. It sets out what the statute says and what recognition changes in practice. Sometimes the honest answer is “it depends on where and how you married”, and this page says so. Scotland and Northern Ireland run their own rules. Nothing here suggests that anyone has done anything wrong.

Is polygamy legal in the UK?

No, not as a route to marrying here. The ceremony itself cannot create a second valid marriage. Section 11(b) makes a marriage void where either party already had a living husband, wife or civil partner. So a second wedding in England and Wales produces nothing the law will count, however sincerely everyone meant it.

A second ceremony here also has a criminal side, and our guide to bigamy covers it. This page is not about that. It is about the far more common situation. A marriage took place lawfully somewhere else, under a law that allows a person to have more than one spouse, and the family now lives here and needs to know what it is worth.

Being in that position is not an offence, and nothing on this page says otherwise. Recognition is the real question behind most searches for polygamy in the UK. It is a technical question, and technical questions have technical answers.

When does England and Wales recognise a polygamous marriage?

Recognition starts with where you married and where you each belonged in law at the time. Section 11(d) voids such a marriage from outside England and Wales on one ground only: that either party had a domicile here when it took place. Read that the other way round and it becomes the key to the page. If neither of you belonged here on the wedding day, section 11(d) has nothing to bite on.

Domicile is not the same as where you live, and it is not nationality either. It is a private international law connection to a legal system, and it can survive years abroad. Because so much rides on it, domicile is usually the first thing a specialist wants to unpick. It is rarely obvious from the outside.

Two other conditions sit behind all of this. The law of the country where you married must have treated the wedding as valid, and you must each have had capacity to marry. The 1995 Act is explicit about that. Section 5 “does not affect the determination of the validity of a marriage by reference to the law of another country to the extent that it falls to be so determined in accordance with the rules of private international law” (PIL(MP)A 1995, s.5(2)). So this guide cannot tell you whether your own marriage is valid, and any page that claims to is guessing. GOV.UK’s guidance on marrying abroad makes the same point from the practical end: local law governs how you marry there. Since that is a question about foreign law, you answer it with evidence rather than assumption.

Is your marriage actually or potentially polygamous?

This is the distinction that decides most cases, and most people have never heard of it. A marriage is actually polygamous when one party already had another spouse at the time. It is potentially polygamous when neither party did, but the law of the place allowed a further spouse later.

Parliament closed the argument in 1995. Section 5 of the Private International Law (Miscellaneous Provisions) Act 1995 says that a marriage entered into outside England and Wales between parties neither of whom is already married is not void here on the ground that it was entered into under a law which permits polygamy and that either party is domiciled in England and Wales. Parliament amended section 11 of the 1973 Act to match, so for the purposes of paragraph (d) it now records that a marriage “is not polygamous if at its inception neither party has any spouse additional to the other”.

So section 11(d) does not catch a first-and-only marriage abroad, even where the local law would have allowed a second one. That holds however long ago it happened, because section 6 deems section 5 to apply, and always to have applied, to marriages entered into before the Act commenced. Section 6 sets limits, though. It does not reach a marriage annulled before commencement, or one where a party had already entered a later marriage by then. Where it does reach back, section 5 gives or affects no entitlement to an interest under the will or on the intestacy of a person who died before commencement, no entitlement to a benefit, allowance or pension payable for an earlier period, and it does not affect tax in respect of an earlier period or event.

Which side of the line is your marriage on?

Can a court here grant financial relief on a polygamous marriage?

Yes, and the statute is unusually direct about it. A court in England and Wales “shall not be precluded from granting matrimonial relief or making a declaration concerning the validity of a marriage by reason only that either party to the marriage is, or has during the subsistence of the marriage been, married to more than one person” (MCA 1973, s.47(1)).

Section 47(2) then spells out what “matrimonial relief” covers. It includes orders under Part I of the 1973 Act, which is where divorce, nullity and the financial orders that follow them live. It also covers financial provision under section 27 and orders altering a maintenance agreement under section 35. Part III of the Matrimonial and Family Proceedings Act 1984 is on the list too, the route for financial relief after an overseas divorce, as are orders under Part I of the Domestic Proceedings and Magistrates’ Courts Act 1978.

One detail matters more than it looks. Section 47(4) lets rules of court require that notice of such proceedings be served on any additional spouse of a party to the marriage, and confer on that spouse the right to be heard in them. In other words, the statute expects that another spouse may have something to add about the money. Families rarely plan for that, and it changes the shape of a case.

Section 47 removes a bar. It does not decide the outcome, and it does not tell you whether a court here can take your case at all. Where the marriage, the divorce or the assets sit abroad, our guide to divorce with an international element explains why the country you apply in changes the result.

What does a polygamous marriage mean for inheritance?

If the law here recognises the marriage, you are a spouse for tax. HMRC’s Inheritance Tax Manual lists “parties to a valid polygamous marriage” among those who count. It says the marriage “confers the IHTA84/S18 exemption on all transfers to all the spouses of the transferor or deceased who qualify” (IHTM11032). The same page puts the parties to a bigamous marriage outside that list, which shows how much the validity point carries.

Succession is a separate question from tax, and it causes the most distress. Whether you inherit on an intestacy, and whether you can claim as a spouse when a will leaves you out, both depend on whether the law here recognises the marriage at all. Families who assumed the paperwork was fine can therefore meet the problem at the worst possible moment.

Timing matters too. Under section 6(6) of the 1995 Act, the change section 5 made gives or affects no entitlement to an interest under the will or codicil of, or on the intestacy of, a person who died before that Part commenced. It leaves that estate as it was. So an old death and a recent one may not get the same answer.

Where do the children of a polygamous marriage stand?

Children are in the strongest position of anyone on this page. A child’s legal parentage, and the arrangements a court makes for them, do not depend on whether the marriage worked. When a court determines any question with respect to the upbringing of a child, the child’s welfare is its paramount consideration (Children Act 1989, s.1(1)). That test does not ask how the parents married.

Where a marriage turns out to be void, Parliament added a further protection. The law treats the child of a void marriage as the legitimate child of his parents where, at the relevant time, both or either of the parties reasonably believed the marriage was valid. For children born after the Family Law Reform Act 1987 came into force it presumes that belief unless the contrary is shown (Legitimacy Act 1976, s.1). That section applies only where the father was domiciled in England and Wales at the time of the birth, or immediately before his death where he died before it.

Both parents must still maintain their children whatever happens to the marriage: each parent of a qualifying child is responsible for maintaining that child (Child Support Act 1991, s.1(1)). So the money for the children and the validity of the wedding run on separate tracks. A worry about one should not stall the other.

Before you act on a polygamous marriage: what do you actually know?

Everything above forks on one fact. Choose the side you are on, then tick what you know for certain rather than what you have always assumed.

What goes wrong when people assume a polygamous marriage counts here?

The damage is almost never immediate. It arrives years later, attached to something else entirely, and by then the choices have narrowed.

• Someone remarries on the wrong assumption. A person who believes an earlier marriage never counted here, and is wrong, can build a whole second family on that belief.
• A family divides an estate on a guess. The validity question surfaces at probate, when the one person who could explain the wedding has died.
• A financial claim goes to the wrong country. Where more than one country could take it, the first application can shut out the better one.
• Another spouse appears mid-case. Section 47(4) contemplates exactly that, yet it still comes as a shock.
• Someone mistakes a religious ceremony for a marriage. A ceremony in England and Wales that misses the formal requirements may leave a couple with no marriage at all, as our guide to a religious ceremony and legal validity explains.

How do our specialists assist and advise?

Our specialists assist and advise from the first conversation. They work through where the wedding took place, what the position was that day, and what it means for a court here. They explain what evidence tends to matter, and what a court here can and cannot do about money, a home or an estate. Where the answer depends on foreign law, they say so plainly rather than guessing. A free initial consultation is a conversation with a specialist who gives you initial advice on your circumstances.

Frequently asked questions

Expert Tip

A marriage certificate proves that a ceremony took place. It does not answer the question section 11(d) actually asks, which is where each of you was domiciled that day. Before any meeting, write down for each spouse the country each of you treated as home at the time, where you were living and working, where family and property were, and whether either of you already had a living husband or wife. Those are the facts the statute turns on, and they are far easier to gather now than when a probate registry or a court asks for them.

Garry Steedman, Family Law Consultant (Divorce, Children & TOLATA)

General information about the law in England and Wales, not advice on your circumstances.