Is an inheritance relationship property in NZ
Updated 2026-08-09. General information, not legal advice.
Not when you receive it. An inheritance is your separate property under the Property (Relationships) Act 1976, and it stays separate for as long as it stays genuinely separate. It becomes relationship property, shareable 50/50, through what you do with it: pay it into the joint account that runs the household, put it into the family home or its mortgage, or otherwise mix it with the couple's shared finances, and its separate character dissolves, usually permanently.
How inheritances lose their separate status
Three ordinary moves do most of the damage. Mixing: the money lands in the joint account and shared living flows through it. Application to the family home: paying down the mortgage or funding the renovation converts the inheritance into the most shared asset there is. And use for the family's common benefit generally: the more the inheritance behaves like family money, the more the law treats it as family money. None of this requires intent; it happens by default, one transfer at a time.
Keeping an inheritance separate
The self-help version: keep it in an account in your sole name, invest it in your sole name, and never route it through shared finances or the home. That works while discipline holds, but it makes the inheritance unusable for the things families actually want, the house, the renovation, and one lapse can undo years of care.
The robust version: a contracting out agreement classifying inheritances, current and future, and whatever they are converted into, as separate property even when used for shared purposes. That is the only way to put an inheritance into the family home and keep its value protected, and it is equally available for family money in a house deposit. Parents leaving significant inheritances increasingly ask their adult children to have one.
Common questions
- Is an inheritance relationship property in NZ?
- No, it starts as separate property. It converts to relationship property if mixed with shared finances or applied to the family's benefit, most commonly by going into the joint account or the family home.
- My partner used their inheritance on our house. Whose is it now?
- Money applied to the family home generally takes on the home's character, and the family home is usually shared equally once the Act applies, unless an agreement protects the contribution. This is one of the most common hard lessons in relationship property.
- Can a prenup protect an inheritance I have not received yet?
- Yes. Agreements routinely classify future inheritances, and everything they are converted into, as separate property, which protects them even if they are later used for shared purposes.
Sources
All information published on prenup.nz, including this guide, is general information only and is not to be construed as legal advice. We strongly recommend seeking independent legal advice about your own situation. A contracting out agreement only binds you once each partner has taken independent legal advice and a lawyer has witnessed and certified each signature, as section 21F of the Property (Relationships) Act 1976 requires.