
About the Author
Daniel Chalmers
Partner, Edwards Family Law
Chambers HNW Ranked
Legal 500 Ranked
18+ years HNW family law
Formerly Clintons
Daniel Chalmers joined Edwards Family Law as a Partner in 2024, bringing over 18 years of family law experience. Prior to joining the firm, he led the family department at Clintons, one of London’s foremost media and entertainment law firms. Chambers High Net Worth 2026 Guide describes him as ‘phenomenal’. He advises on all aspects of financial remedy, pre and post-nuptial agreements, cohabitation agreements, civil partnership dissolution, and property disputes involving unmarried couples.
Q: What is the legal difference between cohabitation and marriage in England and Wales?
A: Married couples and civil partners have comprehensive legal protections covering property, finances, pensions, inheritance and maintenance. Cohabiting couples have almost none. There is no such thing as a common law marriage. The legal gap is significant and affects what happens on separation, on death, and in everyday financial matters.
The number of cohabiting couples in England and Wales has increased by 25% in the past decade, yet the law has not kept pace. Many couples who choose to live together without marrying assume they have similar legal protections. They do not. In my practice, I see the consequences of this assumption regularly – particularly when relationships end or when one partner dies unexpectedly.
In this article, I set out eight important legal differences between cohabitation and marriage, so that couples can make informed decisions about their living arrangements and take steps to protect themselves.
1. Property rights on separation
Married: The court has broad powers to divide property fairly, taking into account the parties’ needs, contributions and the welfare of any children. The court can transfer property from one spouse to the other regardless of whose name is on the title.
Cohabiting: Property belongs to whoever legally owns it. If you are not on the title, you must prove a beneficial interest through a TOLATA claim. The court cannot redistribute property based on fairness or need.
2. Maintenance and financial support
Married: Either spouse can claim maintenance from the other during and after divorce, based on their financial needs and the other’s ability to pay.
Cohabiting: There is no right to maintenance from a former cohabiting partner. You cannot ask the court to order financial support for yourself after separation, only for your children.
This is one of the most common misconceptions of clients in long-term unmarried relationships. Unmarried clients do not have a right to claim maintenance from their former partner.
3. Pensions

Married: Pensions are treated as a matrimonial asset and can be shared through the making of a Pension Sharing Order on divorce. Pensions are often the single most valuable asset in a marriage.
Cohabiting: There is no mechanism to share pensions between unmarried partners. Each partner’s pension remains entirely their own on separation.
4. Inheritance on death
Married: A surviving spouse inherits automatically under the rules of intestacy if there is no will. Even if there is a will that excludes the surviving spouse, they can make a claim under the Inheritance (Provision for Family and Dependants) Act 1975 with a strong presumption in their favour.
Cohabiting: A surviving cohabiting partner has no automatic right to inherit. Under the intestacy rules, the estate passes to children, parents, siblings or other relatives. A cohabiting partner can make an Inheritance Act claim, but the threshold is higher and the outcome less certain than for a spouse.
5. Tax
Married: Married couples benefit from the Marriage Allowance (a transfer of personal allowance worth up to £1,260 in tax savings), exemption from Capital Gains Tax on transfers between spouses, and exemption from Inheritance Tax on transfers between spouses.
Cohabiting: None of these tax advantages apply. Transfers of property or assets between unmarried partners may trigger Capital Gains Tax. There is no Inheritance Tax spousal exemption.
6. Parental responsibility
Married: Both parents automatically have parental responsibility for their children.
Cohabiting: Mothers automatically have parental responsibility. Unmarried fathers only have parental responsibility if they are named on the birth certificate (for births after 1 December 2003), have a Parental Responsibility Agreement, or have obtained a court order. This is an important distinction that many unmarried fathers are unaware of.
7. Decision-making in medical emergencies

Married: A spouse is automatically treated as next of kin for medical decisions and has the right to be consulted about treatment.
Cohabiting: A cohabiting partner has no automatic right to be consulted or to make decisions about their partner’s medical treatment. This can be addressed by executing a Lasting Power of Attorney.
8. Protection from domestic abuse
Married and cohabiting: Both married and cohabiting partners have the same rights to apply for a Non-Molestation Order or Occupation Order under the Family Law Act 1996. This is one of the few areas where the law treats married and cohabiting couples equally.
Both married and unmarried individuals have the right to apply for protective orders under the Family Law Act 1996. Like married individuals, those that are or have been cohabitants are also classified as “associated persons” and so can make the same applications to court.
What can cohabiting couples do to protect themselves?
If you choose to cohabit and not marry, you can still take steps to protect your legal and financial position:
- Enter into a cohabitation agreement setting out your financial arrangements and what happens on separation.
- Make a will leaving your partner the share of your estate you wish them to have.
- Ensure the legal title to any property reflects the true ownership, supported by a declaration of trust.
- Nominate your partner as a pension beneficiary.
- Consider a Lasting Power of Attorney for health and welfare decisions.
- Ensure unmarried fathers are named on the birth certificate.
If you are living with a partner and want to understand how the law applies to your situation, the team at Edwards Family Law can help. Contact us at edwardsfamilylaw.co.uk.
Frequently Asked Questions
A: That is a personal decision. What I would say is that the legal protections offered by marriage are significant and cannot be replicated by any other arrangement. A cohabitation agreement can close some of the gap, but it cannot provide you with pension sharing orders, spousal maintenance or the same inheritance protections.
A: Yes. A civil partnership provides the same legal rights and obligations as marriage in relation to property, finances, pensions, inheritance and children. The only differences are procedural and terminological.
A: The Women and Equalities Committee recommended reform in 2022, but as of April 2026 no legislation has been introduced. Cohabiting couples should plan on the basis that the law as it stands today will not change in the near term.
A: You can enter into a civil partnership or get married at any time. There is no formal ‘conversion’ process from cohabitation. You would simply register a civil partnership or marry.




