For many couples, living together without marrying is a conscious choice. For others, marriage is simply not a priority. Whatever the reason, cohabitation has become one of the most common family arrangements in England and Wales.
Yet despite society changing, the law has not kept pace.
Many people are surprised to discover that there is no such thing as a “common law marriage”. No matter how long a couple have lived together, how many children they have, or how intertwined their finances have become, cohabiting partners have limited financial protection if their relationship breaks down.
This legal gap can leave many families vulnerable, but its impact is not felt equally. In practice, women and children often bear the greatest consequences.
Indeed, since 2021, more children have been born to unmarried parents than married parents. Yet despite this significant social shift, the law continues to provide markedly different protections depending on a parent’s marital status.
The Hidden Financial Risks of Cohabitation
During a relationship, it is common for one partner to take on a greater share of childcare responsibilities, reduce their working hours, or step away from their career altogether. Whilst these arrangements may benefit the family unit, they can create significant financial inequality between partners.
If a married couple separates, the court has wide-ranging powers to consider each party’s needs, contributions and future circumstances. However, if an unmarried couple separates, there is no equivalent system.
Instead, disputes are often governed by complex property and trust law principles. The focus is not on fairness but on ownership.
As a result, a partner who has spent years caring for children and supporting the family may find that they have little or no claim to assets held in the other partner’s sole name.
Economic Abuse and Financial Control
The absence of legal protection can be particularly acute where there has been economic abuse, now recognised as a form of domestic abuse. A financially controlling partner may restrict access to money, prevent the other from working or create financial dependency throughout the relationship. Whilst married spouses have access to financial remedies through the Family Court, cohabiting partners can find themselves relying on complex and costly property disputes, often at a time when they are already financially vulnerable.
Why Children Are Affected Too
The consequences do not stop with the adults.
Following separation, children are still statistically more likely to spend the majority of their time living with their mothers. Where a mother has reduced her earning capacity to care for children during the relationship, the absence of financial protection can have a direct impact on the stability and security available to those children after separation.
Whilst parents remain legally responsible for supporting their children, the law currently offers significantly less protection to families headed by unmarried parents than those whose parents are married.
Marriage, Wealth and Social Inequality
Research has increasingly shown that marriage is becoming associated with higher levels of education, income and financial security. Those who are financially secure are often more likely to marry, purchase property together and access professional advice about protecting their assets.
By contrast, many cohabiting families are less likely to have the resources available to absorb the financial consequences of a relationship breakdown. They are also less likely to have the means to pursue complex and costly litigation concerning property ownership and beneficial interests.
The result is that the absence of legal protection for cohabiting couples can reinforce existing economic inequalities. Families with the least financial resilience often have the least legal protection when relationships end.
This is particularly significant for children. If children born to unmarried parents are disproportionately represented in households with fewer financial resources, the law’s failure to provide meaningful remedies upon separation can have a lasting impact on housing stability, financial security and future opportunities.
In this way, the current legal framework risks creating a system in which those families most in need of protection are often the least protected.
The Case for Reform
For many years, lawyers, judges and campaign groups have called for reform of cohabitation law.
The proposed reforms currently being considered would recognise that many cohabiting couples organise their lives in much the same way as married couples. They share homes, raise children together, make financial sacrifices for one another and build assets as a family.
Under the proposals that have been discussed, qualifying cohabitants may acquire rights after a prescribed period of cohabitation, often suggested as three years, or where the parties have a child together.
The intention is not to replicate marriage, but to provide a fairer safety net where one party has suffered economic disadvantage during the relationship or where children are involved.
What Does This Mean for Couples?
If an opt-out system is ultimately introduced, many cohabiting couples may find themselves automatically covered by the new legal framework.
For some families, this will provide long-overdue protection and certainty.
Others may prefer to retain complete autonomy over their financial arrangements. In those circumstances, a Cohabitation Agreement is likely to become increasingly important.
A properly drafted Cohabitation Agreement enables couples to decide for themselves how assets, property and finances should be treated during the relationship and in the event of separation. Rather than relying on default legal provisions, couples can create a framework tailored to their own circumstances.
Looking Ahead
The law currently assumes that cohabiting couples should largely be left to resolve financial disputes through property law, regardless of the reality of their relationship. For many families, particularly those involving children or financial dependency, that approach can produce harsh and unfair outcomes.
As society continues to move away from traditional models of family life, there is growing recognition that legal protections should not depend solely upon whether a couple has married.
The proposed cohabitation reforms represent an important step towards addressing financial vulnerability and providing greater protection for children and financially weaker partners.
For decades, the law has lagged behind the reality of modern family life. If cohabitation reform is ultimately implemented, it may represent one of the most significant changes to family law in a generation. However, an opt-out system will also mean that couples need to be proactive in understanding their rights. For those who wish to retain control over their financial arrangements, obtaining legal advice and entering into a Cohabitation Agreement may become essential to ensuring that a couple’s intentions, rather than default legal provisions, determine their financial future.
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