What Happens to Your KiwiSaver When You Separate?

Your KiwiSaver Scheme investments are probably relationship property. Here’s exactly how the split works, what it costs, and how to rebuild afterwards.

If you separate in New Zealand, the part of your KiwiSaver Scheme balance built up during the relationship is usually shared equally with your former partner. What matters is when contributions were made, not whose name the account is in. Your ex cannot simply “take” your KiwiSaver; it must be dealt with as part of a formal property settlement, and the process requires agreement or a court order.

In 2024, the Family Court granted 7,497 divorces, according to Stats NZ. The number of de facto relationships ending in the same year is uncounted and almost certainly larger. For most of these couples, KiwiSaver represents the second-largest asset after the family home, yet the way it is treated on separation trips up even well-informed people. In our advisory work, KiwiSaver is one of the most common, and most misunderstood, assets in relationship property settlements.

This guide covers how the law classifies your KiwiSaver Scheme investments on separation, how to value the split, three ways to settle it, and what to do with your retirement savings once the dust clears. The law determines entitlement, but couples still choose how to implement the settlement. Those choices have real consequences for your finances in retirement. For the broader financial picture of divorce, including housing, debt, insurance, and budgeting, see our companion article: your financial roadmap for divorce.

The Legal Framework

The Property (Relationships) Act 1976 governs how assets and debts are divided when a qualifying relationship ends. A qualifying relationship means a marriage, civil union, or de facto relationship of three years or more. The default position is a 50/50 split of all relationship property.

Two common misconceptions are worth clearing up immediately.

1. First, de facto couples are subject to the same rules as married couples once the three-year threshold is crossed. If you have been living together as a couple for three years, you are in, regardless of whether you ever signed a marriage certificate.
2. Second, even relationships shorter than three years can trigger the equal-sharing rules if there is a child of the relationship or if one partner has made a substantial contribution (section 14A of the Act).

Relationship property includes the family home, vehicles, savings, investments, and debts accumulated during the relationship. Separate property, meaning assets owned before the relationship, inheritances, and gifts, is generally excluded from the split, provided it has been kept genuinely separate. Mix an inheritance into a joint account or use it to pay down the mortgage, and it risks losing its separate status.

Is Your KiwiSaver Relationship Property?

Almost certainly, in part. The rule is straightforward: any contributions made to your KiwiSaver Scheme during the relationship are relationship property. This includes your employee contributions, your employer contributions, the government’s member tax credit, and any voluntary contributions you made from relationship income. The growth on those contributions is also relationship property.

Pre-relationship balances are a different story. If you opened your KiwiSaver account before the relationship began, the balance at the point the relationship started, and any growth on those pre-relationship units, remains your separate property. This is the nuance most guides either miss or explain badly. The pre-relationship portion is not frozen at its original dollar value. It continues to earn returns, and those returns belong to you.

A Worked Example

Emma opened a KiwiSaver account in 2014 with a balance of $15,000. She entered a de facto relationship with Tom in 2017, at which point her balance was $22,000 and she held 8,000 units in a growth fund. They separated in 2025 with her total balance at $68,000 and 18,000 units.

Emma’s 8,000 pre-relationship units (and their current value) remain her separate property. Only the 10,000 units accumulated during the relationship, and their current value, form part of the relationship property pool. Tom’s entire KiwiSaver balance, because he joined after they got together, is relationship property. Both accounts are pooled alongside all other relationship assets and divided equally.

If Emma had withdrawn KiwiSaver funds during the relationship for a first home purchase, the withdrawn amount may need to be accounted for in the property settlement. Each situation turns on the specific facts, and a family lawyer should confirm the classification in any disputed case.

Contributions from Separate Property

If you made voluntary contributions to KiwiSaver using money classified as separate property, such as an inheritance kept in a separate account, those contributions may retain their separate status. The burden of proving the money trail rests with the person claiming the separate classification. To make this work, you need to keep clear records: the bank statement showing the deposit from the original source (such as a will or gift), the transfer record into your KiwiSaver account, and ideally a copy of the relevant will, estate distribution letter, or gift documentation. Without this paper trail, proving the separate origin becomes difficult, expensive, or impossible.

Valuing the Split

The date of separation is typically used as the valuation date for KiwiSaver. Each partner should contact their KiwiSaver provider and request a balance statement as at the separation date, specifying the total balance, the unit breakdown, and, if relevant, the balance at the date the relationship began. Not all providers use the same terminology for this report; asking for a “relationship property valuation” or a “historical balance statement” will generally be understood. If there is a dispute about when the relationship actually ended, the valuation date itself can become contested, and an independent valuation may be needed.

A poorly chosen or poorly documented valuation date can shift tens of thousands of dollars between partners without anyone realising it until the settlement is signed. Lock it down early, ideally with provider statements in hand, and agree on the date before negotiating numbers.

Once the relationship property component of each partner’s KiwiSaver is established, those amounts are added to the total pool of relationship property alongside everything else: the family home, savings, debts, vehicles, and other investments. The pool is then divided equally.

Three Ways to Settle the KiwiSaver Split

1. Offset Against Other Assets

This is the most common approach and suits couples with enough other assets to absorb the adjustment. Both partners keep their KiwiSaver accounts intact, and the difference is settled through other property. If one partner’s relationship KiwiSaver balance exceeds the other’s by $30,000, the partner with the larger balance might receive $15,000 less from the sale of the family home, or the other partner keeps the car, or the difference is paid in cash.

The advantage is simplicity: no court involvement is required for the KiwiSaver portion, no filing fees, and both partners retain their retirement savings in full. The disadvantage is it requires enough other assets to absorb the adjustment. If KiwiSaver is the couple’s dominant asset and there is little else to trade, offsetting may not be possible.

2. Direct Transfer Between KiwiSaver Accounts

This option suits couples who want to keep all retirement savings within KiwiSaver but cannot offset through other assets. Funds are transferred from one partner’s KiwiSaver account directly into the other’s. This requires a Family Court order. The process preserves the retirement savings purpose: money stays locked in KiwiSaver and continues to grow until both partners reach 65.

The costs are a court filing fee (approximately $700) plus legal fees (typically $1,000 or more). Some KiwiSaver providers may also charge an administration fee to process the transfer. Not all providers support direct transfers, so check with your provider before committing to this option. The court process typically takes one to three months, and the judge reviews the application on the papers without requiring either party to appear.

3. Court-Ordered Withdrawal

This option is typically used when there are insufficient other assets and a direct transfer is not suitable, or when a clean cash settlement is preferred. The Family Court can order a KiwiSaver provider to release funds. The money can be paid into the other partner’s bank account or KiwiSaver account. This reduces the total pool of retirement savings permanently, so it carries the highest long-term cost. However, some couples choose it deliberately because a cash settlement is cleaner or fairer in their circumstances.

The costs and timeline are similar to a direct transfer: a filing fee, legal fees, and one to three months for the court to process the application. Your lawyer will handle the administration, and your KiwiSaver provider will need a copy of the court order before releasing funds. As with transfers, some providers may charge a processing fee.

If you are going through a separation and want to understand how your KiwiSaver and broader finances fit together, book a complimentary initial consultation with one of our advisers.

Protecting Your KiwiSaver Before It Becomes an Issue

A contracting out agreement (section 21 of the PRA, commonly known as a prenup) is the only way to override the default 50/50 split. The agreement can specify how KiwiSaver balances, including pre-relationship and relationship components, are treated on separation. It can also ring-fence future voluntary contributions from separate property.

For a contracting out agreement to be legally binding, both partners must receive independent legal advice from separate lawyers, and each lawyer must witness their client’s signature and certify they explained the agreement’s effect. Skip any step and the agreement is void. The cost is typically $2,000 to $5,000 for the couple.

Rebuilding Your KiwiSaver After Separation

Divorce does not just split assets. It disrupts compounding, and the longer you leave the disruption unaddressed, the harder it becomes to recover. The Retirement Commission’s 2025 analysis of more than 3.2 million KiwiSaver members found a 25% gender gap in balances overall, widening to 37% for those aged 56 to 65. Women approaching retirement carried roughly $20,000 less in their KiwiSaver accounts than men of the same age. Separation compounds this gap, particularly for women who took career breaks for caregiving.

One of our financial advisers, Jonny McNamee, puts it directly: ‍

“A divorce between 40 and 55 might delay retirement by a decade. You need to figure out where you can live, how you can save, and how to get some of those dreams back again.”

Three practical steps can meaningfully close the gap.

Review Your Contribution Rate

Default employee contributions rose to 3.5% on 1 April 2026, with a further increase to 4% from April 2028. If you can afford to contribute more, even an extra 1% of your salary, the compounding effect over 20 or 30 years is substantial. Voluntary lump-sum contributions are another lever, particularly if you receive a cash settlement from the separation.

Review Your Fund Selection

Post-separation is a natural moment to reassess whether your current fund type still matches your time horizon. If retirement is 15 or more years away, a growth or balanced fund will typically outperform a conservative fund over the long run, even accounting for short-term volatility. The Retirement Commission data shows women are more likely to select conservative funds, contributing to the gender gap in balances at retirement.

Consider Investments Outside KiwiSaver

KiwiSaver is locked until 65. If your separation has left you without a financial buffer, rebuilding liquid savings alongside KiwiSaver gives you flexibility for medium-term goals: a new home deposit, education costs, or simply a safety net while you reestablish yourself. A financial adviser can help you work out the right balance between KiwiSaver contributions and accessible investments.

Frequently Asked Questions

Is all of my KiwiSaver relationship property?

No. Only contributions made during the relationship (and their growth) are relationship property. Your pre-relationship balance, and the growth on those pre-relationship units, remains your separate property. If you joined KiwiSaver after the relationship started, the entire balance is likely relationship property.

What if only one of us has a KiwiSaver?

It does not matter. KiwiSaver balances are pooled with all other relationship property and divided equally. If only one partner has a KiwiSaver Scheme account, the relationship portion of it still forms part of the total asset pool to be split.

Can I change KiwiSaver providers during separation?

You can switch providers at any time. However, if you are in the middle of a property settlement, switching could complicate the valuation process. Notify your lawyer before making any changes to your KiwiSaver account during separation proceedings.

What happens if the market moves between separation and settlement?

This is a real risk, particularly in volatile markets. If months or years pass between the agreed separation date and the final settlement, KiwiSaver balances can shift meaningfully. Most settlements fix the valuation at the separation date, so subsequent gains or losses fall to the account holder. If both parties agree, a later valuation date can be used, but this introduces its own complications. The key is to agree on the valuation date early and document it clearly.

Do I need a lawyer?

For any settlement involving KiwiSaver division, legal advice is strongly recommended. A separation agreement must meet formal requirements under the PRA to be legally binding, and both partners need independent legal advice from separate lawyers. If a Family Court order is needed to transfer or withdraw KiwiSaver funds, a lawyer is practically essential, as some providers require legal representation.

What about overseas superannuation or retirement accounts?

Overseas retirement accounts, including Australian superannuation, are also captured by the PRA if the contributions were made during the relationship. The valuation and division mechanics are more complex, particularly where different jurisdictions have different lock-in rules. Specialist legal advice is essential.

Your KiwiSaver When You Separate

KiwiSaver is relationship property, and the law is clear on how it must be treated. The mechanics of settling it involve real choices with lasting consequences for your retirement. The single biggest risk is inaction: contributions you are not making, fund choices you are not reviewing, and settlement decisions you are deferring all compound in the wrong direction. If you are navigating a separation and want a clear picture of where your finances stand, talk to us.

Become Wealth provides financial advice and investment management, not legal advice. For guidance specific to your relationship property situation, consult a family lawyer.