Open Marriage in India: What the Law Actually Says
Riya and Karan have been married for nine years. They have a child, a home loan and a shared Netflix password. After many long, sometimes difficult conversations, they have also agreed that either of them can see other people, as long as everything is honest and out in the open. They call it an open marriage.
So is that legal in India?
The short answer: nobody is going to arrest you for it, but the law does not recognise it either. Indian marriage law was written with one assumption in mind, that two people marry, stay loyal to each other and that is that. An open marriage sits in the gap between what the law forbids and what the law has bothered to think about. That gap is where the problems show up: in divorce, maintenance, child custody, inheritance and the position of the outside partner.
This guide walks through each of those areas in simple language. It is general information, not legal advice, and it ends with a checklist you can actually use.
What 'open marriage' means (and what it doesn't)
An open marriage is one where a married couple agrees, with full and informed consent from both sides, that either of them may have romantic or sexual relationships with other people. The word that matters is agreement.
It helps to separate it from a few things it is often confused with.
Cheating or infidelity happens in secret, without the other spouse's consent.
Bigamy means marrying a second person while your first marriage is still valid. An open marriage involves no second marriage.
Polyamory means having more than one loving relationship at the same time. A married couple can be polyamorous, but polyamory does not require marriage at all.
Swinging usually means a couple having sexual encounters with others, often together and often only for sex.
Indian courts do not use any of these labels. When a dispute reaches a judge, the questions are much more basic. Is there a valid marriage? Did either person marry someone else? Did one spouse have sex outside the marriage, and did the other spouse agree to it? So whatever name you give your arrangement, the law looks at what actually happened.
Is open marriage legal in India?
Nothing in Indian law makes it a crime for two consenting adults to agree to an open marriage. The Supreme Court has also been protective of personal choices in intimate matters. In K.S. Puttaswamy v. Union of India (2017), it held that privacy, including decisions about intimate life, is part of the right to life under Article 21. In Navtej Singh Johar v. Union of India (2018), it struck down the criminal ban on consensual same-sex relations. And in Shafin Jahan v. Asokan K.M. (2018), it said an adult's choice of partner is part of personal liberty.
But 'not a crime' is not the same as 'legally recognised'. No Indian statute gives any legal effect to an agreement to be non-monogamous. Your marriage remains an ordinary marriage under whichever law governs you, whether that is the Hindu Marriage Act, 1955, the Special Marriage Act, 1954, the Muslim personal law, the Indian Divorce Act, 1869 or the Parsi Marriage and Divorce Act, 1936. All the usual rights and duties continue to apply.
Adultery is no longer a crime, but it still matters
Until 2018, Section 497 of the Indian Penal Code made adultery a criminal offence, but in a strangely one-sided way. Only a man who slept with another man's wife could be punished. The wife could not be prosecuted, and a husband who slept with an unmarried woman committed no offence at all.
In Joseph Shine v. Union of India (2018), a five-judge Constitution Bench struck the provision down. The court said it treated a wife as her husband's property and was unfair to women. When the Bharatiya Nyaya Sanhita (BNS), 2023 replaced the IPC, it did not bring adultery back as a crime.
That is the good news for open marriages. Two spouses, or a spouse and an outside partner, cannot be sent to jail for adultery.
The catch is that the Supreme Court said clearly that adultery can still be a ground for divorce. It remains a civil wrong inside a marriage, even though it is no longer a crime against the state.
Bigamy: the real red line
If there is one legal risk that couples in open marriages must take seriously, it is bigamy.
Under Section 5(i) of the Hindu Marriage Act, a marriage is valid only if neither person has a living spouse at the time. A second marriage during the first is void under Section 11. Section 17 makes it a crime, and the offence is now in Section 82 of the BNS. Marrying again while your spouse is alive can mean up to seven years in prison and a fine. If you hide the first marriage from the new partner, the punishment goes up to ten years.
An open marriage does not become bigamy just because you have another partner. It becomes bigamy when you go through a marriage with that partner.
Courts have said that for a Hindu marriage to count, the essential ceremonies must be performed, usually including the saptapadi (seven steps around the sacred fire) where custom requires it. A relationship without a wedding is not a second marriage. But do not take chances with anything that looks like a wedding. A temple ceremony, an exchange of garlands or a registered marriage with the outside partner can all be used as evidence in a bigamy complaint.
Two more points are worth knowing.
Changing your religion does not get you around the bigamy law. In Sarla Mudgal v. Union of India (1995) and Lily Thomas v. Union of India (2000), the Supreme Court held that converting to marry again is no defence.
Muslim personal law allows a man to have up to four wives, so the bigamy offence does not apply to him in the same way. Some states are moving to change this. Uttarakhand's Uniform Civil Code, which came into force in January 2025, bars marrying while a spouse is living, across communities, in that state. Check the law of your own state.
What an open marriage means for divorce
Under the Hindu Marriage Act (Section 13(1)(i)) and the Special Marriage Act (Section 27(1)(a)), a spouse can seek divorce if the other has had voluntary sexual intercourse with someone outside the marriage. Other personal laws have their own grounds, and conduct of this kind usually features in them. Persistent behaviour that hurts a spouse can also be argued as cruelty, which is a separate ground.
So what happens if the spouse agreed to the arrangement?
Here the law actually helps. Section 23(1)(b) of the Hindu Marriage Act says that where the ground for divorce is adultery, the court should not grant the decree if the petitioner was an accessory to the act, connived at it or condoned it. In plain words, if you knew about it and agreed to it, you may not be able to turn around and use it as a reason for divorce.
Before you rely on this, three cautions.
Consent can be withdrawn. A spouse who agreed in 2022 can say in 2025 that they no longer agree. Courts will look at whether consent was free, informed and still in place when the act took place.
Proof is hard. A verbal understanding between two people at home is very difficult to prove in court.
Other grounds remain. Even if the adultery argument fails, the unhappy spouse might file for cruelty or desertion instead.
If an open marriage ends and both of you agree to separate, you can also go for divorce by mutual consent under Section 13B. The Supreme Court has said the usual six-month waiting period can be waived in suitable cases, as in Amardeep Singh v. Harveen Kaur (2017).
Can you sign an open marriage agreement?
You can write one, but do not expect a court to enforce it.
Indian courts have long treated agreements between spouses about domestic life as personal arrangements rather than binding contracts. The Indian Contract Act also treats agreements against public policy as void (Section 23), and a court is unlikely to order a husband or wife to follow rules about who they may see and when.
That said, a written note is not useless. Dated emails, WhatsApp messages or a signed statement of your understanding can later serve as evidence that your spouse knew and agreed. That evidence may matter in a divorce case, where connivance or condonation is the question.
One honest warning: such a document should record a genuine, mutual understanding. It should never be used to pressure a reluctant spouse into agreeing.
Maintenance, alimony and property
This is the area where open marriages carry the most financial risk, especially for women.
Maintenance for a wife. Under Section 125 of the old Code of Criminal Procedure (now Section 144 of the Bharatiya Nagarik Suraksha Sanhita, 2023), a wife cannot claim maintenance if she is living in adultery, or if she and her husband are living separately by mutual consent. Courts have generally read 'living in adultery' as an ongoing course of conduct and not a single lapse, but the provision exists and can be used against her.
Alimony after divorce. Under Sections 24 and 25 of the Hindu Marriage Act, courts decide interim and permanent alimony, and a spouse's conduct can be taken into account.
Property. India has no general law that splits all property equally on divorce. A court looks at what each person owns, earns and needs. During the marriage, each spouse generally owns what is in their own name.
Inheritance. A spouse is a first-class heir under the Hindu Succession Act. An outside partner has no right to inherit unless you leave them something by will or name them as nominee. Equally, if you die without a will, your spouse and children can claim your estate no matter what your arrangement was.
The practical lesson is to keep your finances clean. Make a will, update nominees on bank accounts, insurance and provident fund, and be clear about who owns what.
What happens to the children
Children are the part of this topic where the law is most protective, and rightly so.
A child born during a valid marriage is presumed by law to be the legitimate child of the husband. This presumption used to sit in Section 112 of the Indian Evidence Act and is now in Section 116 of the Bharatiya Sakshya Adhiniyam, 2023. It is strong, and courts are cautious about ordering DNA tests that would question it.
Children born from a relationship outside marriage are not left without rights either. In Tulsa v. Durghatiya (2008) and Revanasiddappa v. Mallikarjun (2011), the Supreme Court held that children born of long-term relationships or void marriages should not suffer for what their parents did, and can claim a share in their parents' property.
For custody, courts decide on one test: what is best for the child. A parent's lifestyle is not automatically held against them, but it can be raised if it affects the child's safety, stability or upbringing. In practice, a calm and stable home counts for a lot.
The outside partner's legal position
If you are the third person in an open marriage, you should know that your legal protection is thin.
You are not a spouse. You have no automatic claim to maintenance or inheritance. The Domestic Violence Act, 2005 protects women in a 'relationship in the nature of marriage', but in Indra Sarma v. V.K.V. Sarma (2013) the Supreme Court set a high bar. It looked at things like how long the couple lived together, whether they shared a household and whether they presented themselves to society as a couple. It also noted that a partner who knew the man was already married was not in the same position as one who was deceived. Later cases have not all followed the same line, so this area remains uncertain.
There is one more provision to be aware of. Section 84 of the BNS (earlier Section 498 of the IPC) punishes a person who takes away or entices a married woman with the intention that she have illicit intercourse. The punishment is up to two years. Prosecution normally needs a complaint from her husband or the person caring for her. If the husband knows and agrees, a complaint is unlikely, but relationships can turn bitter, and agreements made in good times are sometimes denied in bad ones.
Health, privacy and safety
Some legal risks have nothing to do with marriage law at all.
Sexual health. The BNS punishes acts that negligently or knowingly spread a disease dangerous to life. The HIV and AIDS (Prevention and Control) Act, 2017 protects the privacy of people living with HIV and bans discrimination against them. Regular testing and protection are good practice and also protect you legally.
Intimate images. Recording someone without consent, or sharing private images, can be an offence under the BNS (voyeurism) and the Information Technology Act (Sections 66E, 67 and 67A). This applies to your spouse and your other partners alike.
Everyday life. Housing societies, workplaces and relatives are not bound by your private agreement. No law bars your arrangement, but social and family reactions in India can be harsh, and it is wise to think about who will know and how you will handle it.
What the courts have said so far
To date, there is no reported Supreme Court judgment that deals directly with open marriage. What exists is a set of rulings on neighbouring subjects: privacy, adultery, live-in relationships, bigamy and personal liberty.
On live-in relationships, for example, the Supreme Court has said in Lata Singh v. State of U.P. (2006) and S. Khushboo v. Kanniammal (2010) that living together as adults is not an offence. At the same time, courts continue to describe marriage as an important social institution, and different High Courts and judges can take quite different views. If your case ever reaches court, the outcome may depend on your state, your judge and the facts. It is sensible to plan for that uncertainty.
A practical checklist for couples
Talk first, and keep talking. Consent should be informed, enthusiastic and ongoing. If one of you wants to stop, the arrangement stops.
Keep a record. Save messages or emails that show what you both agreed to and when.
Never marry again. Do not go through a wedding-style ceremony or register a marriage with another partner while your marriage subsists.
Sort out money. Make a will, review nominees, and keep clear records of property and savings.
Protect your health. Use protection and get tested regularly.
Respect privacy. Never record or share intimate content without clear permission.
Put children first. Keep their routine stable and their exposure to conflict low.
Speak to a family lawyer. Because the law here is unsettled, a lawyer in your city can advise on your personal law and your state's rules.
Frequently asked questions
Is open marriage legal in India?
It is not illegal for consenting adults to agree to one, but it has no legal recognition. Your marriage continues under the same laws as any other marriage.
Can I go to jail for having an affair in India?
Not for adultery. The Supreme Court struck down the adultery offence in 2018 and the BNS does not revive it. You can, however, face a divorce case. Marrying a second person while your spouse is alive is bigamy, and that is a crime.
If my spouse agreed to an open marriage, can they still divorce me for adultery?
Possibly, if they withdraw their consent or choose another ground such as cruelty. But under Section 23(1)(b) of the Hindu Marriage Act, a spouse who connived at or condoned the act may find it hard to succeed on the ground of adultery.
Is a written open marriage agreement valid?
It will not be enforced like an ordinary contract, but it can serve as evidence of what both of you understood.
Is polyamory legal in India?
Having several consenting relationships is not a crime. Marrying more than one person is bigamy for most Indians, and there is no legal recognition for multi-partner families.
Do I need to register an open marriage?
No. There is no such registration. You only register your legal marriage, as usual.
Final thoughts
Indian law has moved towards treating adults as capable of running their own intimate lives. It no longer jails people for adultery, and it protects privacy and choice. But the law of marriage itself has barely changed. It still talks in terms of one husband, one wife and fidelity as a duty, and that mismatch is what open marriages run into.
If you choose this path, the legal protections are mostly the ones you build yourself: clear consent, honest records, tidy finances, a valid will and a lawyer you can call when things get complicated.
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