Unmarried couples who choose to build a life together without formal marriage are increasingly finding themselves in a precarious financial position, with a lack of automatic legal, financial, and inheritance rights that can lead to significant hardship if a relationship ends or a partner dies. Despite cohabitation becoming more common, with millions of couples living together and a substantial percentage of children born outside of wedlock, many remain unaware of the financial protections that marriage provides and the risks they face without it.

Experts warn that cohabiting couples could see their finances seriously damaged. Unlike married couples, unmarried partners have no automatic rights to their partner's assets, pensions, or even their shared home. This can result in a surviving partner being left with nothing, being forced out of their home, or facing substantial inheritance tax bills.

Recent proposals by the government aim to update cohabitation laws, acknowledging that the current legal framework has not kept pace with modern family structures. These proposed reforms, which were open for public consultation, intend to provide a safety net for couples who split up or for those who survive their partner. The changes would apply to couples who have lived together for at least three years or those who live together and have children. Key provisions include granting cohabiting couples similar intestacy rights to spouses when a partner dies without a will, and allowing partners to claim a share in the sale of a home owned in the other's name during a separation. However, these reforms are designed to maintain distinctions from marriage, with courts only intervening to meet an individual's specific needs, such as a parent who gave up their career to care for children.

A significant financial pitfall for unmarried couples is inheritance tax (IHT). Married couples can pass wealth to each other tax-free and can utilize unused allowances, potentially allowing a surviving spouse to inherit up to £1 million tax-free. Unmarried couples do not receive these benefits. For instance, comedian Ricky Gervais announced he would marry his partner of 44 years to avoid a substantial IHT bill on his £141 million fortune, which would otherwise incur a tax of over £56 million. Even for couples with more modest assets, the tax implications can be severe. Without marriage, assets passed to a surviving partner can be subject to a 40% tax on amounts exceeding certain thresholds, significantly reducing the inheritance compared to a married couple.

The proposed reforms, while aiming to offer some protection, also introduce new risks. Concerns have been raised that these changes could inadvertently lead to wealth falling into the wrong hands. For example, gifts from parents towards a child's first home could be at risk of being claimed by an ex-partner if the couple splits up, even if they are not married. Additionally, it could complicate inheritance for children from previous relationships, as an estate might be partially inherited by a current cohabiting partner if there is no will.

To mitigate these risks, experts advise unmarried couples to take proactive steps. Writing a will is crucial to ensure assets are distributed according to their wishes. Cohabitation agreements, legally binding documents outlining ownership and asset division in case of a split, can also provide clarity. Nominating a partner as a beneficiary for pension savings is another important measure. For those seeking to minimize IHT without marrying, strategies such as making gifts more than seven years before death or utilizing the 'gifts out of normal expenditure' allowance can be considered. Ultimately, while marriage offers the most comprehensive financial protections, couples are cautioned to weigh the implications of marriage against potential tax benefits, considering the responsibilities and risks associated with divorce.

It is also noted that in Scotland, unmarried couples have some rights to address financial imbalances after a split, and there is a possibility for couples to opt out of future cohabitation reforms if they mutually agree, although the mechanism for this is not yet fully defined.