Quick Answer: Will disputes in blended families are among the most common and most contested estate conflicts in New Zealand. They arise most often when a surviving second spouse inherits the bulk of the estate, leaving children from the first marriage with little or nothing — or when step-children discover they have fewer legal rights than biological children despite years of being treated as family members.
Why Blended Families Create Estate Conflict
A blended family faces inherent estate planning tension. The most common conflict scenario: a person with children from a first marriage remarries. Their new will leaves everything to the second spouse. On the testator’s death, the second spouse inherits everything. The children from the first marriage receive nothing — and may be surprised to discover that their ability to challenge this outcome under NZ law is more limited than they expected.
What Rights Do Biological Children Have?
Biological children — including children born outside of marriage — are among those who can make an adequate provision claim under the Family Protection Act 1955 if they were inadequately provided for. This includes adult children, not just minors.
However, the strength of the claim depends on context — particularly the financial circumstances of the claimant child, the size of the estate, and the competing obligations the testator had to the surviving spouse.
What Rights Do Step-Children Have?
Step-children occupy a fundamentally different legal position from biological children. Step-children are not automatically entitled to make a claim under the Family Protection Act 1955 — that right is limited to biological and legally adopted children.
A step-child who lived with a step-parent, was supported by them, and was treated as a child of the family may discover they have no right to make a Family Protection Act claim. The only route available may be a dependency claim — arguing financial dependency on the deceased — which is more limited in scope and harder to establish.
The Second Spouse vs First Family Conflict
The most heavily contested blended family pattern: a surviving second spouse receives the entire estate, and children from the first marriage bring a claim under the Family Protection Act 1955. The court must balance the competing obligations to the surviving spouse and to the children.
- The surviving spouse’s right to be maintained in the lifestyle they enjoyed during the marriage is given significant weight
- Children from the first marriage must show genuine financial need or a particularly strong relationship to succeed
- Where the estate is large enough to meet both the spouse’s needs and make reasonable provision for the children, courts are more willing to award provision to the children
- Where the estate is modest, the spouse’s claim almost always prevails
Specific Risks for Families With International Connections
Overseas children who do not know NZ law: Children living in China, South Korea, or Southeast Asia often do not know their rights or the 12-month time limit under the Family Protection Act. By the time they become aware of the position, the window may have closed.
Assets held in trusts: In blended families where assets have been placed in trusts during the deceased’s lifetime, those assets are not part of the estate and cannot be claimed under the Family Protection Act. Children who expected to inherit may find the estate is significantly smaller than anticipated.
Different cultural expectations: Families from cultures where assets pass only within the bloodline may find NZ law treats their expectations differently from what they assumed.
Agile Legal advises blended families on estate planning that addresses these tensions before they become disputes, and advises parties — including overseas claimants — through our will dispute resolution service.
Legal Disclaimer: This article is for general informational purposes only and does not constitute legal advice. Every case is unique. If you require legal assistance, please contact Agile Legal for a confidential consultation.
Frequently Asked Questions
Can a step-parent leave everything to their biological children and nothing to step-children?
Yes, unless the step-children have been legally adopted or are financially dependent on the step-parent. NZ law does not require biological or step-parents to provide for step-children under the Family Protection Act 1955. However, step-children who were dependent on the deceased may have a limited dependency claim.
What happens if the testator made a mutual will agreement with their first spouse before remarrying?
If a person made a mutual will agreement with their first spouse and then remarried and made a new will without honouring that agreement, the first spouse’s estate or children may have a claim based on breach of the mutual will agreement. This area of law is unsettled in NZ and requires specific legal advice.
Should blended families use a trust instead of a will?
A trust-based structure is often more effective than a will alone for managing competing inheritance interests. A discretionary family trust can hold assets with a broad range of beneficiaries — including both biological children and step-children — and give trustees the flexibility to distribute based on need over time. Legal advice on the appropriate structure is essential.