Standish v Standish- The Supreme Court provides clarity on “matrimonalisation” of assets

On 2 July 2025, the Supreme Court delivered a unanimous judgment dismissing the wife’s appeal in the landmark case of Standish v Standish. This decision has brought significant clarity to the field of matrimonial finance, notably in relation to high-value cases, by providing authoritative guidance on the clarification of assets as matrimonial property.

The Facts

Standish v Standish

The case relates to Husband (72) and Wife (57) who were involved in contested financial remedy proceedings.  The parties began their relationship in 2003, married in 2005 and separated in 2020. They had two children and spent much of their time residing abroad, primarily in Australia.

Husband had acquired his significant wealth prior to the relationship commencing, having built a successful career in the financial sector.  Wife, by contrast, had primarily taken on the role of homemaker and primary caregiver to the children.

In 2017, as part of a tax planning strategy, Husband, acting on expert advice, transferred approximately £80 million from his sole name into Wife’s name. Husband’s case was that this was not for the Wife to benefit from personally, but rather to facilitate the creation of discretionary trusts for the children. From Husband’s point of view, the money transferred to Wife was non-matrimonial funds, and he had expected Wife to make suitable arrangements to set up the necessary discretionary trusts for the children in line with the professional advice received.

The Court Applications

Unfortunately, by the time the parties entered litigation, Wife had not carried out the request to set up the trust funds for the children. The funds, on paper, remained in her sole name, having been transferred to her in 2017 by Husband. Wife argued that this money was hers, despite Husband’s earlier intention and the specific advice he had received.

The court initially determined that there should be a 60:40 division of the funds, allowing Wife to retain £45 million of the amount transferred.

Both parties appealed the decision. Wife sought a greater share of the overall asset pot, while Husband maintained that the majority of the assets constituted pre-marital wealth and should not be subject to the sharing principle.

The Court of Appeal subsequently heard the case and determined that Wife’s award should be reduced to £22 million, a significant reduction to her earlier award and departure from her request for nearly £66 million. The court concluded that only 25% of the funds in question should be treated as matrimonial property, given that the majority had been acquired by Husband before the marriage. Accordingly, Wife was awarded half the assets deemed matrimonial. Wife sought to appeal this decision.

The Supreme Court

At the Supreme Court sitting on 2 July 2025, the case was determined, and a unanimous decision reached. Lord Burrows delivered the Court’s judgment and dismissed Wife’s appeal.

The Court helpfully outlined the reasoning behind its conclusion, offering much-needed clarity for family law practitioners on how key principles should be applied, particularly in relation to how assets can become “matrimonialised.” This term was accepted by the Court as a “useful shorthand term” in cases of this nature.

The Conclusion and Its Impact

The Court confirmed that the distinction between matrimonial and non-matrimonial assets will “turn on the source of the assets”. It further clarified that assets will be considered “matrimonial” if they were “the fruits of the marriage, or a product of common endeavour.”

The Court reiterated that property deemed matrimonial should ordinarily be shared equally. Crucially, the judgement provides clarity that non-matrimonial assets should not be subject to the sharing principle.

In addition, the Court acknowledged that assets may become matrimonial over time, depending on how they are treated by the parties. If assets are used or regarded as shared, they may acquire a matrimonial character. However, the mere fact of marriage does not automatically convert non-matrimonial assets into matrimonial property.

What next?

It will be important for family law practitioners advising on separation, as well as those drafting pre-nuptial agreements, to take careful note of the Supreme Court’s conclusions in Standish v Standish. The Court’s clear and structured approach offers valuable guidance on the treatment of non-matrimonial assets and circumstances under which assets become matrimonialised.

For the full judgment, please visit this article on the Supreme Court’s website. If you would like to discuss any matrimonial matters or seek advice tailored to your situation, please don’t hesitate to contact us.