This Practice Note considers the court’s approach to non-matrimonial or non-civil partnership assets when determining the extent of the assets to be divided, including how such assets are defined and the impact of whether they were acquired pre- or post- marriage or civil partnership and before or after separation. It also considers the concept of matrimonialisation and looks at different types of asset and the circumstances in which they may be regarded as non-matrimonial or non-civil partnership assets, including bonuses, compensation, damages, passive growth and the significance of the type and source of an asset. In this Practice Note the terms, non-matrimonial property and matrimonial property, should be taken respectively as including non-civil partnership property and civil partnership property. Matrimonial property is, in broad terms, property acquired by either party during the marriage otherwise than by gift or inheritance, plus (in almost all cases) the matrimonial home. The term ‘marital acquest’ may be applied to assets in this category. Non-matrimonial property is everything else, noting that non-matrimonial property can become matrimonial through a process known as matrimonialisation.