General information only — not legal advice. The position of stepchildren in inheritance is fact-specific and can be complex, especially in blended families. This guide explains the general position in New Zealand. If stepchildren are part of your family, get advice from a qualified New Zealand lawyer.
The short answer
Yes — stepchildren can inherit if they are named in a will. But they do not have an automatic right to inherit under the intestacy rules, which generally focus on biological and adopted children. In some circumstances, a stepchild may be able to bring a claim against an estate under the Family Protection Act 1955 — but that depends on the facts and is never guaranteed.
Stepchildren and a will
If you want a stepchild to inherit, the reliable way is to name them in your will — as a specific beneficiary, a residuary beneficiary, or both. A will can provide for stepchildren exactly as it provides for anyone else. Without a will, or without naming them, there is no automatic entitlement.
Stepchildren and intestacy
If someone dies without a will, the intestacy rules in the Administration Act 1969 determine who inherits. Those rules generally provide for a spouse or partner and biological or adopted children — stepchildren are not included by default. A stepchild who is not legally adopted usually does not inherit under intestacy, even if they were raised as part of the family.
Claims under the Family Protection Act
The Family Protection Act 1955 allows certain people to claim that a will does not make adequate provision for their proper maintenance and support. Stepchildren can bring such a claim in some circumstances — for example, where they were treated as part of the family or dependent on the will-maker. Whether a claim succeeds depends on the nature of the relationship, the will-maker’s obligations, and the estate’s value.
A claim is not automatic, and it is never a substitute for being named in the will. Stepchildren who are not provided for may also need their own legal advice about whether they have a claim at all.
Why wills matter in blended families
Blended families are where stepchildren issues most often arise. The common problem: a will leaves everything to a new partner, on the assumption the partner will look after the stepchildren — but the partner later makes their own will that does not. If you want stepchildren to benefit, the will (and often a trust) should say so directly.
Common misconceptions
Two beliefs cause most of the trouble:
- “stepchildren inherit automatically if there’s no will” — generally false under the intestacy rules; and
- “a stepchild can easily claim if left out” — possible in some circumstances, but fact-specific and uncertain.
The bottom line
Stepchildren can inherit — but only if the will says so. Under intestacy they generally do not inherit automatically, and a Family Protection Act claim depends on the facts. If stepchildren are part of your family, provide for them deliberately in your will and get advice on the structure. Our guide on legal issues and guide on beneficiaries cover the surrounding questions.