Is Inherited Money Relationship Property in New Zealand?

Money you inherit is generally classified as your separate property under the Property (Relationships) Act 1976, meaning it belongs to you alone, not to both partners. Section 10 of the Act specifically classifies property acquired by succession (inheritance) as separate property, excluded from the equal sharing regime. But this protection is not bulletproof. The moment you mix inherited money with relationship property, whether by depositing it into a joint account, using it to pay down the mortgage on the family home, or renovating a shared asset, you risk converting it into relationship property that your partner has a claim to.

This is one of the most common and costly mistakes we see in relationship property disputes. The legal principle is straightforward: separate property remains separate only for as long as you keep it separate. Once inherited funds lose their identity by being intermingled with relationship property, section 10(2) of the Act can reclassify them. The consequences are significant. Inheritances worth hundreds of thousands of dollars can become subject to 50/50 division if they have been absorbed into the shared pool.

Understanding how and when this happens is critical for anyone who has received an inheritance, expects to receive one, or is separating from a partner and needs to trace what is rightfully theirs.

What Does the Law Say About Inherited Money?

The Property (Relationships) Act 1976 draws a clear line between relationship property (shared equally) and separate property (kept by the owner). Inherited money falls squarely into the separate property category under section 10, which deals specifically with property acquired by succession.

The equal sharing rules in section 11 of the Act, which divide the family home, family chattels, and relationship property 50/50, do not apply to separate property. This means that in principle, if you inherit $200,000 from a parent, that money is yours and yours alone.

However, the Act also contains section 10(2), which is the provision that catches most people out. Section 10(2) states that where separate property acquired by succession has been intermingled with relationship property, the whole or part of that property may be treated as relationship property.

This creates a tension at the heart of relationship property law: the Act protects your inheritance, but the protection evaporates the moment you treat the money as shared.

How Does Inherited Money Become Relationship Property?

There are several common scenarios where an inheritance loses its separate property status. Each involves some form of intermingling or blending with shared assets.

Paying Down the Joint Mortgage

This is the most frequent trap. You inherit money and use it to reduce the mortgage on the family home. The family home is relationship property under section 8(1)(a) of the Act, regardless of whose name is on the title. Once your inheritance is absorbed into the home’s equity, it becomes extremely difficult to argue it should be carved out as separate property.

Once inherited money is applied to the family home, it is absorbed into a relationship property asset. The family home is relationship property by statute, and tracing does not change that classification. The inheritance loses its separate character entirely. The only potential avenue is a section 13 argument for an unequal division based on extraordinary circumstances, but that is a high threshold and a different exercise from tracing.

Leaving Inherited Money in a Joint Account

Depositing inherited money into a joint bank account does not automatically convert it into relationship property. If the funds can be traced, for example where a lump sum was deposited and is still identifiable, the inheritance retains its separate character. The problem arises when inherited money is left in a joint account over time and mixed with salary, household spending, and other transactions to the point where it can no longer be identified. At that point, the funds lose their separate identity and become relationship property.

Buying Family Chattels Including Vehicles

Family chattels, including cars, boats, furniture, and other household items, are relationship property under the Act in the same way the family home is. If you use inherited money to buy a vehicle that both partners use, or to furnish the family home, the inheritance is absorbed into a relationship property asset. As with the family home, tracing does not change the statutory classification. The inheritance loses its separate character once it is applied to a family chattel.

Renovating the Family Home

Using inherited money to renovate or improve the family home effectively converts it into an increase in the value of relationship property. A $100,000 kitchen renovation funded entirely by your inheritance becomes part of the home’s value, which is divided equally on separation.

Investing Jointly

If inherited funds are used to purchase a shared investment property, contribute to a joint share portfolio, or fund a business operated by both partners, the inheritance becomes part of the relationship property pool.

Can You Trace Your Inheritance Back?

New Zealand courts do allow tracing, which is the process of following the path of separate property to demonstrate that it retains its separate character. Tracing is a well-established principle in New Zealand relationship property law. It works where inherited funds can be identified and followed through accounts or into assets that are not classified as relationship property by statute. For example, inherited money deposited into a joint bank account can potentially be traced if the amounts are identifiable and the funds have not been dissipated through general spending.

However, tracing has a hard limit: it does not work where inherited money has been applied to the family home. The family home is relationship property under section 8, and that statutory classification overrides any tracing argument. Once inherited money goes into the mortgage or purchase of the family home, it is absorbed into a relationship property asset and loses its separate character. The only potential route in that scenario is a section 13 argument for an unequal division based on extraordinary circumstances, which is a high threshold and a fundamentally different exercise from tracing.

Tracing works best when:

• The inherited funds were kept in a separate account and can be clearly identified
• Bank statements, estate records, and transaction histories demonstrate the flow of money
• The funds were applied to an asset that is not relationship property by statute
• The amount of the inheritance can be precisely identified and has not been dissipated

Tracing does not work when:

• Inherited money has been applied to the family home or family chattels including vehicles (which are relationship property under the Act regardless of who funded them)
• The funds were deposited into a joint account and mixed with other funds over time beyond identification
• The money was used for general living expenses rather than a specific identifiable asset
• Years have passed and records are incomplete

“The single most important piece of advice I give clients who are about to receive an inheritance is this: keep it separate. Open a dedicated account in your name only, deposit the funds there, and do not mix them with anything else. The cost of maintaining a separate account is trivial compared to the cost of losing half an inheritance in a property dispute.”
Andy Bell, Partner, Lane Neave (Legal 500 Asia Pacific Recommended Lawyer)

What About the Family Home Bought With Inherited Money?

A particularly painful scenario arises when one partner’s inheritance was used as the deposit on the family home. Under section 8(1)(a) of the Property (Relationships) Act 1976, the family home is relationship property regardless of who paid for it or whose name is on the title. This is a bedrock principle of the Act. The home where the couple lives together is shared equally.

However, the partner who contributed the inheritance may be able to argue for an unequal division under section 13 of the Act. Section 13 provides an exception to equal sharing where the court is satisfied that there are “extraordinary circumstances” that would make equal sharing “repugnant to justice.” In that case, the court can divide the property according to each partner’s respective contributions, as defined in section 18 of the Act. This is a high threshold. The courts do not apply section 13 lightly, and a large inheritance used as the deposit on the family home, particularly in a shorter relationship, is among the strongest type of scenario where section 13 may apply. In longer relationships, courts are far less likely to find that equal sharing is repugnant to justice.

The key factors the court considers include:

• The size of the inheritance relative to the total value of the home
• Whether the contribution can be clearly traced and quantified
• The length of the relationship after the contribution was made
• Whether both partners contributed to the home in other ways (mortgage payments, maintenance, renovations)
• Whether equal sharing would produce a result that is repugnant to justice in the circumstances

In practice, section 13 claims are strongest when the inheritance was a large, identifiable lump sum applied directly to the purchase in a relatively short relationship. They are weakest when a modest amount was mixed into a long relationship’s shared finances over many years, where both partners made significant contributions.

Does the Length of the Relationship Matter?

Yes, practically if not strictly legally. While the Act does not contain a specific rule that inheritances become “more shared” over time, the courts take a pragmatic view. An inheritance contributed to the family home two years into a relationship is easier to trace and argue for than one contributed 25 years ago where both partners have since made substantial contributions to the same asset.

How Can You Protect an Inheritance?

The most effective protection is a contracting out agreement (often called a prenup or postnup) under section 21 of the Property (Relationships) Act 1976. A contracting out agreement allows partners to agree in advance that specific assets, including inheritances, will remain separate property regardless of how they are used during the relationship.

A valid contracting out agreement requires:

1. The agreement must be in writing
2. Each partner must receive independent legal advice from separate lawyers
3. Each lawyer must certify that they explained the effect and implications of the agreement to their client
4. The agreement must not be set aside as seriously unjust under section 21J

For people who have already received an inheritance or expect to receive one, a contracting out agreement is the gold standard of protection. It removes the uncertainty of tracing claims and section 13 arguments entirely.

Beyond a contracting out agreement, practical steps to protect an inheritance include:

• Keep inherited funds in a separate bank account in your name only. Do not deposit them into a joint account.
• Maintain clear records. Keep the grant of probate, estate distribution letters, and bank statements showing the funds arriving and remaining separate.
• Get legal advice before using inherited money on a shared asset. Document the transaction and understand how to protect your position.
• Consider whether a family trust is an appropriate vehicle for holding inherited assets (though trusts bring their own relationship property complications, including the court’s power to compensate the other partner under section 44C where trust property has been used to defeat their claims).
• Talk to your partner. A contracting out agreement is most effective when entered into transparently and cooperatively, not imposed under pressure.

What Should You Do?

If you have inherited money, expect an inheritance, or are separating and need to argue that inherited funds should be treated as separate property, here are the key steps:

1. Get legal advice early. The earlier you act, the more options you have, whether that means setting up a contracting out agreement or establishing a clear paper trail for tracing purposes.
2. Keep inherited money separate. Open a dedicated bank account in your name only. Do not deposit inherited funds into any joint account, even temporarily.
3. Document everything. Keep copies of the will, grant of probate, estate distribution letters, and every bank statement that shows the movement of inherited funds.
4. Think carefully before using inherited money on the family home. If you do contribute inherited funds to a shared asset, get legal advice first about how to protect your position. A section 13 claim is possible but not guaranteed.
5. Consider a contracting out agreement. This is the most reliable way to protect an inheritance from equal sharing, and it can be entered into at any stage of a relationship.

Frequently Asked Questions

Is money I inherit automatically shared with my partner?

No. Under section 10 of the Property (Relationships) Act 1976, money received by succession (inheritance) is classified as separate property. It belongs to you alone and is not subject to equal sharing. However, if you intermingle the inheritance with relationship property, for example by leaving it in a joint account until it can no longer be identified, or using it on the family home, it may lose its separate status under section 10(2).

What happens if I used my inheritance to buy our family home?

The family home is always relationship property under the Act, regardless of who funded the purchase. Your inheritance is absorbed into that asset and loses its separate character. Tracing does not override the statutory classification of the family home. However, you may be able to argue for an unequal division under section 13 of the Act, which allows the court to depart from equal sharing in extraordinary circumstances. This is a high threshold, and the strength of the claim depends on the size of the contribution, the length of the relationship, and the overall circumstances.

Can a contracting out agreement protect my inheritance?

Yes. A contracting out agreement under section 21 of the Act is the most effective way to protect an inheritance. It allows you and your partner to agree that specific assets will remain separate property. Both partners must receive independent legal advice for the agreement to be valid. A contracting out agreement can be entered into before or during a relationship.

How long do I have to make a claim about my inheritance after separation?

The time limits depend on the type of relationship. For married couples and civil union partners, you must apply within 12 months of the dissolution (divorce) order, not from the date of separation. For de facto couples, you must apply within three years of ceasing to live together. The court can grant leave to file late in both cases, but delays weaken your position. Records become harder to obtain, assets may be disposed of, and the court may view a long delay unfavourably.

Does it matter whether we are married or de facto?

No. The Property (Relationships) Act 1976 applies equally to married couples, civil union partners, and de facto couples who have lived together for three years or more. Under section 14A, the Act can also apply to shorter de facto relationships where there is a child of the relationship or one partner has made a substantial contribution and serious injustice would result from excluding the relationship. The rules about separate property, intermingling, and tracing apply in exactly the same way regardless of the form of the relationship.

Written by Andy Bell, Partner at Lane Neave
LLB, BA (Psychology), Victoria University of Wellington
Recommended Lawyer, Legal 500 Asia Pacific

For a free 30-minute consultation about protecting your inheritance or any relationship property matter, contact us.

Related reading:

• Relationship Property Division
• Prenuptial Agreements & Contracting Out