Millions of unmarried couples are walking into a legal trap by assuming living together gives them the same rights as marriage, but family lawyers warn this is not true. When relationships break down or a partner dies, many discover that years of sharing a home and finances count for far less in law than expected.
The warning applies to older readers starting new relationships after bereavement or divorce, as well as younger couples buying their first home. Petra van Dijk, director at SE-Solicitors, said the same mistakes appear "again and again" because couples assume the law will protect them without anything in writing.
Common Law Marriage Myth
Many couples still believe living together for long enough automatically gives them legal rights over property and financial support. Van Dijk said: "Couples often tell me they've been 'as good as married' for a decade, thinking that counts for something legally. It doesn't." Many are shocked to discover they have no automatic right to stay in the home or share its value if the relationship ends.
Paying Mortgage Without Agreement
It is common for one partner to pay the deposit while both contribute towards the mortgage or bills. Van Dijk said this can be a flashpoint after separation. "If your partner moves in and starts contributing to the mortgage, that does not automatically hand them a claim to your home, but it does create a legal grey area." Couples can spend vast sums arguing over ownership that could have been avoided with a simple legal agreement from the start.
Renovations and Wills
Many couples split the cost of improvements like a new kitchen or extension. Van Dijk said: "I've seen partners spend tens of thousands renovating a home they don't legally own without ever agreeing on what they'd get back." She recommends a Declaration of Trust to record contributions. Under intestacy rules in England and Wales, an unmarried partner has no automatic right to inherit if someone dies without a will. "If you want your partner to inherit your share of the home, you need a will that says so explicitly. Without it, the law will decide for you, and it will not decide in your partner's favour." This can leave the surviving partner facing buying out relatives or selling their home.
Trusting Promises
Vague promises to split everything can prove almost impossible to enforce years later. "A conversation is not a legal document. When money is on the table, memories change. What felt like a shared plan five years ago turns into two completely different stories in a courtroom," van Dijk said. Lawyers recommend a Declaration of Trust to record who owns what, a cohabitation agreement for broader financial arrangements, and an up-to-date will. These may not be romantic conversations, but they could spare a bitter legal dispute later.
