How Relationship Property Law Affects Your Retirement Savings

Sarah had contributed to her KiwiSaver for 18 years, diligently building a balance of $127,000. Her partner, Mark, had opted out early in their relationship and contributed nothing. When they separated after 14 years together, Sarah was shocked to learn that half of her KiwiSaver growth during their relationship belonged to Mark under New Zealand law.

This scenario plays out regularly across New Zealand. The Property (Relationships) Act 1976 treats most assets acquired during a relationship as shared property, regardless of whose name they're in or who earned the money. For couples planning retirement, these rules can significantly reshape your financial landscape.

The Property (Relationships) Act defines relationship property broadly. After three years of living together (or immediately if you have a child together), the default position is equal sharing of relationship property.

Relationship property typically includes:

• The family home, regardless of whose name is on the title
• Household chattels and vehicles used by the family
• KiwiSaver and other retirement savings accumulated during the relationship
• Shares, investments, and business assets acquired during the relationship
• Debt incurred for relationship purposes

Separate property includes:

• Assets owned before the relationship began
• Gifts or inheritances received by one partner
• Personal injury compensation payments
• Property acquired through separate property (though this gets complicated)

The challenge comes when separate and relationship property become intermingled. If you used an inheritance to reduce the mortgage on your shared home, or if your KiwiSaver balance has grown from both pre-relationship and relationship contributions, determining what's separate becomes complex.

KiwiSaver division follows specific rules that many New Zealanders misunderstand. The key principle: only the portion accumulated during the qualifying relationship period is subject to division.

Here's the calculation process:

Step 1: Establish the relationship period
Count from when you began living together in a marriage, civil union, or de facto relationship. For property division purposes, the relationship must have lasted at least three years (unless you have children together).

Step 2: Determine pre-relationship balances
Your KiwiSaver balance on the day your relationship began remains your separate property. Request a statement from your provider showing your balance at that specific date.

Step 3: Calculate relationship property portion
The growth from the relationship start date to the separation date is relationship property. This includes your contributions, employer contributions, government contributions, and investment returns during this period.

Step 4: Apply the 50/50 division
The relationship property portion is generally split equally, regardless of who contributed more or earned more during the relationship.

Example calculation:
Emma's KiwiSaver balance when she met James: $35,000
Emma's balance at separation (12 years later): $142,000
Relationship property portion: $107,000
James's entitlement: $53,500
Emma retains: $88,500 ($35,000 separate property + $53,500 relationship property share)

Unlike other assets that can be sold or transferred immediately, KiwiSaver funds remain locked until you meet withdrawal conditions (typically age 65, first home purchase, significant financial hardship, or permanent emigration). This creates unique challenges for property division.

Option 1: Family Court order for immediate transfer
You can apply to the Family Court for an order under Section 44C of the Property (Relationships) Act to transfer KiwiSaver funds between partners' accounts. This allows the receiving partner's share to be moved into their own KiwiSaver account, where it continues growing until they can access it. The transferred amount remains subject to the same withdrawal restrictions.

Option 2: Offset against other assets
Many couples choose to offset KiwiSaver entitlements against other relationship property. For instance, one partner might retain their full KiwiSaver balance while the other receives a larger share of home equity or other accessible assets. This approach requires agreement or mediation but avoids the complexity of actual KiwiSaver transfers.

Option 3: Deferred division
Some separation agreements specify that KiwiSaver will be divided when one or both partners become eligible to withdraw funds. This delays the division but can be simpler administratively.

Each option has tax implications and practical considerations worth discussing with a family lawyer experienced in property matters.

KiwiSaver isn't the only retirement asset subject to relationship property rules. The same principles apply to:

Other superannuation schemes
If you belong to an employer superannuation scheme or have a private retirement fund, the portion accumulated during the relationship is typically relationship property. Some schemes have specific rules about transferring benefits, which may require specialist legal advice.

Investment properties intended for retirement
Rental properties purchased during the relationship, even if explicitly intended to fund retirement, are generally relationship property. The division includes both equity and any rental income streams, which can significantly impact retirement planning for both partners.

Shares and managed funds
Investment portfolios built during the relationship fall under the same division rules, regardless of whether they're earmarked for retirement. One partner might have managed all investments, but both typically share equally in the relationship property portion.

Business assets and goodwill
If you're self-employed or own a business that represents your retirement plan (such as a medical practice or trade business you plan to sell), the increase in value during the relationship may be relationship property, even if only one partner worked in the business.

Under Section 21 of the Act, couples can create a contracting out agreement (sometimes called a prenuptial or relationship property agreement) that overrides the default equal sharing rules.

These agreements might specify that:

• Each partner retains their own KiwiSaver and retirement savings
• Division occurs in different proportions than 50/50
• Certain assets remain separate property regardless of when acquired
• Different rules apply depending on relationship duration

Critical requirements for valid agreements:
Both partners must receive independent legal advice before signing. Each must have a different lawyer who explains the agreement's effects and implications. The agreement must be in writing and signed by both parties. Without these protections, courts can set agreements aside.

Contracting out agreements made under duress, without full financial disclosure, or when one partner didn't understand the implications can be challenged in court. The agreement must be fair at the time it's signed, though courts have limited power to intervene if circumstances change dramatically later.

Property division can significantly set back retirement plans, particularly for older New Zealanders who have less time to rebuild savings. If you're facing separation in your 50s or 60s, consider these factors when reconstructing your retirement strategy:

Reassess your retirement timeline
Losing half your KiwiSaver balance might mean working longer than originally planned. Run fresh calculations based on your post-division balance and current contribution rate. Our guide on calculating your personal retirement number can help you establish new targets.

Maximise remaining working years
If you're still employed, consider increasing your KiwiSaver contribution rate above the minimum. The sooner you increase contributions after separation, the more time compound growth has to work. Even an extra 1-2% can make meaningful differences over a decade.

Review your fund type
After division, your risk tolerance and time horizon might have changed. A conservative fund that made sense at 60 with a large balance might not suit a reduced balance that needs growth. However, remember that any fund changes should align with your personal circumstances, and you may want to discuss options with a licensed financial adviser.

Consider housing costs carefully
Many separating couples must sell the family home and purchase or rent separately, often at higher combined costs. Housing expenses in retirement deserve careful thought, as they're typically your largest fixed cost. Our comparison of renting versus owning as a retiree explores various scenarios.

Don't forget about NZ Super
Remember that NZ Superannuation eligibility isn't affected by relationship property division. You'll still receive NZ Super at 65 based on your residency, though your payment rate may change from the married/partnered rate to the single rate.

Misconception 1: "My partner never contributed, so they get nothing"
Equal sharing applies regardless of who earned income or made contributions. If one partner stayed home with children while the other worked and contributed to KiwiSaver, the law recognises the non-financial contributions to the relationship.

Misconception 2: "We were only together two years, so we don't divide anything"
While the three-year rule generally applies, if you have children together or one partner made substantial contributions to the other's property, courts can still order division. Additionally, the three years is cumulative, if you lived together, separated, then reconciled, the periods may count together.

Misconception 3: "KiwiSaver in my name is my separate property"
The name on the account is irrelevant. What matters is when the funds were accumulated and whether you were in a qualifying relationship at the time.

Misconception 4: "Once we separate, KiwiSaver is automatically divided"
Division doesn't happen automatically. You must either reach an agreement (documented in a separation agreement) or apply to the Family Court. Many separated couples leave property division unresolved for years, which can create complications later.

Misconception 5: "I can withdraw KiwiSaver early to prevent my partner getting half"
KiwiSaver withdrawal rules don't change because of separation. You still can't access funds until you meet standard criteria. Attempting to dispose of or waste relationship property before division can result in court orders compensating your partner.

Whether you're entering a new relationship, currently partnered, or facing separation, understanding these property rules helps you make informed decisions:

For new relationships:
If you've built substantial retirement savings before meeting your partner, consider discussing a contracting out agreement early. While not romantic, these conversations are increasingly common and can prevent misunderstandings later. Both partners should understand what they're agreeing to and receive proper legal advice.

For established relationships:
Keep records of your pre-relationship KiwiSaver balance and any separate property contributions. If you receive an inheritance during your relationship and want to keep it separate, document this clearly and avoid mixing these funds with relationship property.

For separating couples:
Seek legal advice early, preferably before agreeing to any property division. Many people make costly agreements informally, then discover they've given up entitlements they didn't know they had. Family lawyers can help you understand your rights and negotiate fair outcomes.

Property division also intersects with estate planning. Our article on blended families and retirement explores how relationship property rules affect estate planning when you have children from previous relationships.

This article is general information only and does not constitute personalised financial or legal advice. Relationship property law is complex and circumstances vary significantly. For advice tailored to your situation, speak with a family lawyer experienced in property matters. For financial planning assistance, consult a licensed Financial Advice Provider. You can find a registered adviser at fma.govt.nz.