UK England and Wales: far less protection than people assume
No amount of time living together creates a legal relationship. On separation there is no claim for maintenance for yourself, no automatic share of your partner's assets, and no right to a share of a property held in their sole name simply because you lived there.
What does exist is property law. Under the Trusts of Land and Appointment of Trustees Act 1996, you may be able to establish a beneficial interest in a property — but you generally have to prove a common intention to share and that you acted to your detriment in reliance on it. Paying rent, or paying for the food shop while the other paid the mortgage, is usually not enough. These cases are notoriously difficult and expensive.
Where there are children, Schedule 1 of the Children Act 1989 allows applications for financial provision for the child's benefit, which can include housing until the child finishes education. That is provision for the child, not for you, and it typically reverts afterwards.
Scotland: real but time-limited claims
The Family Law (Scotland) Act 2006 gave cohabitants rights that have no equivalent south of the border. On separation, a former cohabitant can apply to the court for a capital payment where they have suffered economic disadvantage in the interests of the other person or a child, or where the other person has gained an economic advantage from their contributions.
The time limit is short and unforgiving: one year from the date the cohabitation ends. Miss it and the claim is gone. This is the single most important practical fact in this guide, and the reason Scottish cohabitants should take advice quickly rather than waiting to see how things settle.
Where a cohabitant dies without a will, a survivor can apply to the court for provision from the estate, but that window is even shorter — six months. Again, missing it ends the claim.
The claims are discretionary and generally more modest than what a spouse would receive. They are compensation for imbalance, not an equal share.
Northern Ireland
Northern Ireland's position is closer to England and Wales: there is no cohabitant financial claim regime equivalent to the Scottish one, and separating cohabitants are largely thrown back on property law and on provision for children.
What actually protects you
A cohabitation agreement. A written agreement recording what each of you owns, how outgoings are shared, and what happens to the property if you separate. Unromantic, comparatively cheap, and vastly cheaper than litigating the same questions later.
Getting the title right. If you are buying together, how the property is held — and in what shares — is recorded at the point of purchase. A declaration of trust setting out unequal contributions is far more reliable than trying to prove intentions years later.
Making a will. Cohabitants do not inherit automatically anywhere in the UK. Without a will, your partner may receive nothing at all under the intestacy rules, regardless of how long you were together. Citizens Advice sets out the basics free of charge.
Checking pension nominations. Many schemes will pay a death benefit to a cohabiting partner, but usually only if nominated. See our guide to pensions for why nomination forms matter.
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