Separating in New Zealand? 5 legal points you need to know

Last updated: 18 July 2026

Separation in New Zealand is a decision, not a court process. You are legally separated the moment one partner decides the relationship is over and acts on it, and you do not need a court order or a lawyer to make it official. What does need legal attention is everything that follows: dividing your property, sorting out care of the children, and making sure the final outcome is actually fair to you. The five points below cover what matters most.

The core law is the Property (Relationships) Act 1976, which generally divides relationship property equally between partners. It applies to married couples, civil union partners, and de facto couples who have lived together for three years or more. Alongside it, the Care of Children Act 2004 governs arrangements for children, always on the basis of the child’s best interests. Getting early advice, ideally before you move out or sign anything, is the single most useful thing you can do to protect yourself.

1. Separation is a decision, but divorce has a two-year wait

Separation and divorce are two different things in New Zealand law. You separate when one partner decides the relationship has ended and the couple stops living together as a couple. No paperwork, court application, or agreement from the other person is required. You can even be separated while living under the same roof if the relationship has genuinely ended.

Divorce, known formally as dissolution of marriage or civil union, is a separate legal step and only applies to married or civil union couples. The only ground is irreconcilable breakdown, proven by living apart for at least two years. You cannot shorten that two-year period, even if both of you agree you want it done sooner. Short attempts at reconciliation of up to three months in total do not reset the clock.

The date of separation still matters even if you never divorce. It generally fixes what goes into the shared property pool, because assets either of you acquire after separation are usually separate property. The value of that property, though, is normally assessed when it is actually divided, not as at the date you separated. Record your separation date clearly either way.

2. Relationship property is generally split 50/50

Under the Property (Relationships) Act 1976, relationship property is generally divided equally, regardless of who earned more or whose name is on the title. Relationship property usually includes the family home and its contents, the family car, KiwiSaver contributions made during the relationship, and most assets and debts acquired while you were together.

Equal sharing applies to marriages, civil unions, and de facto relationships of three years or more. For de facto couples together less than three years, the Act usually does not apply, though a court can still intervene if there is a child of the relationship or one partner made a substantial contribution and serious injustice would otherwise result.

Not everything gets split. Separate property, meaning assets one partner owned before the relationship, plus inheritances and gifts received during it, can be excluded. The catch is that separate property can lose that status if it is mixed with relationship property. An inheritance paid into a joint account, or used to pay down the mortgage on the family home, may become relationship property and fall into the 50/50 pool. This is one of the most common and costly misunderstandings people have when they separate.

Equal sharing is a strong presumption, not an absolute rule. In rare cases, where extraordinary circumstances would make an equal split seriously unjust, a court can order an unequal division under section 13 of the Act. That bar is high and rarely met, but the exception exists.

3. Equal sharing may not be the end of it

An equal split of property does not always produce a fair result, and the law recognises that. Where one partner is likely to be significantly worse off after separation because of the way roles were divided during the relationship, section 15 of the Property (Relationships) Act 1976 lets the Family Court order compensation. This is known as an economic disparity claim. The classic example is a partner who stepped back from a career to raise children or support the other’s earning power.

The compensation is paid out of the better-off partner’s share, as a lump sum or a transfer of assets, on top of the equal division rather than instead of it. To succeed, you need to show a significant disparity in income and living standards going forward, and that the disparity was caused by the division of functions during the relationship.

In practice, economic disparity claims are hard-fought. They usually rely on expert accounting evidence and remain highly discretionary, so a difference in income between the two of you is not on its own enough to succeed. They are worth exploring, not assuming.

Separate from that, spousal maintenance can provide ongoing financial support while a former partner gets back on their feet. Maintenance is claimed under the Family Proceedings Act 1980, looks to future income needs rather than past contributions, and is assessed differently from an economic disparity claim. Many people assume 50/50 is the whole story. Often it is not.

“Economic disparity is the most overlooked issue in a separation. I regularly see people accept a straight equal split and walk away, not realising that years out of the workforce raising children may entitle them to a further adjustment. If one of you gave up earning power for the relationship, that is exactly what section 15 is designed to address. Get it assessed before you sign anything.”

— Andy Bell, Partner, Lane Neave
Recommended lawyer in the Asia Pacific Legal 500 and Doyle’s Guide 2026

4. Care of the children is decided separately, on the child’s best interests

Arrangements for children are dealt with under the Care of Children Act 2004, entirely separately from how you divide your property. The governing principle is the welfare and best interests of the child, which the Act makes the paramount consideration. The law now speaks of day-to-day care and contact rather than the older language of custody and access, and it emphasises parental responsibilities over parental rights.

Most parents reach their own arrangement, often recorded in a parenting plan. If you cannot agree, you can attend Family Dispute Resolution mediation, and as a last resort apply to the Family Court for a Parenting Order. Where a marriage or civil union involves children under 16, a judge granting a dissolution must be satisfied that proper arrangements for their care and financial support are in place.

Child support is handled by Inland Revenue, not the Family Court. It is assessed using a formula based on each parent’s income, the number of children, and how much time each parent spends caring for them. Parents who prefer can also agree their own private arrangement.

5. You can agree your own terms, with independent legal advice

You do not have to leave your future to a court. The law lets couples make their own binding agreement about how to divide property. Made before or during a relationship, it is a contracting-out agreement under section 21 of the Property (Relationships) Act 1976, commonly called a prenup. Made when you separate, to settle how your property is actually divided, it is a settlement agreement under section 21A of the same Act.

For either to be legally binding, the same strict requirements apply under section 21F. The agreement must be in writing and signed by both partners, each partner must receive independent legal advice before signing, and each signature must be witnessed by a lawyer who certifies they explained its effect and implications. Skip these steps and the agreement can be challenged.

Even a valid agreement can be set aside by a court under section 21J if giving effect to it would cause serious injustice, so the terms need to be fair as well as properly executed. A section 21A settlement dealing with property, and a parenting plan dealing with the children, together let you settle matters on your own terms rather than a judge’s.

What you should do if you are separating

If you have decided to separate, or think you might, these steps protect your position.

Our team advises on both relationship property division and care of children and parenting arrangements, and where a separation overlaps with a workplace issue we can help on the employment side too.

Frequently asked questions

Do I need to go to court to separate in New Zealand?

No. You are legally separated as soon as one partner decides the relationship is over and the couple stops living together as a couple. You only need the court for a divorce (dissolution), which is a separate step available to married and civil union couples after two years apart.

How is the family home divided after separation?

The family home is usually relationship property and is generally shared equally under the Property (Relationships) Act 1976, regardless of whose name is on the title. Exceptions can apply, particularly where separate property was used to buy or pay down the home, so it is worth getting advice on your specific situation.

Can I get more than half if I gave up my career during the relationship?

Possibly. Section 15 of the Property (Relationships) Act 1976 lets the court order compensation where one partner will be significantly worse off after separation because of how roles were divided during the relationship. It is paid from the other partner’s share, on top of the equal split, and is separate from spousal maintenance.

What happens to KiwiSaver when a couple separates?

Contributions made to KiwiSaver during the relationship are generally treated as relationship property and can be divided. The portion built up before the relationship may be separate property. This is a common area of dispute, so get advice before assuming your KiwiSaver is untouchable.

Can we sort everything out without lawyers?

You can reach your own arrangements, but a separation settlement (a section 21A agreement under the Property (Relationships) Act 1976) is only legally binding if each partner has independent legal advice and the signatures are witnessed and certified by a lawyer. Informal agreements without these steps can be challenged and set aside.

Last updated: 18 July 2026. This article is general information, not legal advice. For advice on your own situation, speak with a family lawyer.