Private residential property. A transfer of a share between partners on separation is chargeable to stamp duty, because section 27 of the Stamp Duty Ordinance (Cap. 117) treats a voluntary disposition as a conveyance on sale; the agreement should state who bears that cost. A declaration of trust can be registered under the Land Registration Ordinance (Cap. 128), which gives it priority against later purchasers and chargees. Where the flat is held as joint tenants, the right of survivorship passes it entirely to the survivor on death unless the joint tenancy has been severed.
Subsidised housing. Home Ownership Scheme flats with the premium unpaid are subject to alienation restrictions under the Housing Ordinance (Cap. 283), and a promise to transfer a beneficial share may breach them. Public rental tenancies attach to the registered household, so a partner never added to it has no right to remain after a separation. Check the Housing Authority rules before promising any share in a subsidised flat.
Expatriate and cross-border couples. An unmarried partner generally cannot be sponsored for a dependant visa. In QT v Director of Immigration the Court of Final Appeal opened that route to partners in a civil partnership concluded abroad, but not to couples who never formalised their relationship. Assets in Mainland China or overseas follow the law where they sit, and a foreign court may apply its own cohabitation rules, so the template combines a Hong Kong governing law clause with an obligation to sign any local documents needed to implement the agreed division.
Same-sex couples. Following the Court of Final Appeal's decisions on intestacy and subsidised housing, couples married overseas now have limited recognition in those areas. Unmarried same-sex partners have none, and they are not treated as next of kin in hospital. For them the cohabitation agreement, an enduring power of attorney and a Hong Kong will under the Wills Ordinance are the only way to secure property, decision-making and inheritance.