The median household net worth for New Zealanders aged 35–44 is approximately NZ$280,000 in 2025-26. By 40, the wealth divide between homeowners and renters is near its widest — those who entered the property market in their late 20s or early 30s are now seeing compounding benefits from both capital appreciation and mortgage paydown, while those who haven’t yet entered the market are building wealth primarily through KiwiSaver and savings alone.
This is also the decade where KiwiSaver starts to become a meaningful number. A 40-year-old who joined KiwiSaver at launch in 2007 has had nearly 19 years of contributions — enough for a balance that is beginning to make a visible difference to their financial position.
For a personalised comparison, use our New Zealand net worth percentile calculator.
Net Worth Benchmarks at Age 40
| Scenario | Estimated Net Worth | Approx. Percentile (35–44) |
|---|---|---|
| Long-term homeowner (bought pre-2015, minimal mortgage remaining) | ~NZ$700,000–$950,000 | 88th–95th |
| Homeowner (bought 2018–2020, significant equity built) | ~NZ$450,000–$600,000 | 65th–78th |
| Homeowner (bought 2022–2023, limited equity) | ~NZ$150,000–$280,000 | 40th–58th |
| Renter: consistent saver, NZ$65K KiwiSaver + NZ$40K investments | ~NZ$110,000–$140,000 | 28th–35th |
| Renter: average saver, NZ$45K KiwiSaver + NZ$15K savings | ~NZ$60,000–$80,000 | 18th–24th |
Source: Estimated from Stats NZ Survey of Household Net Worth 2021 adjusted to 2025-26.
Net Worth by Homeownership Status at 40
| Tenure | Estimated Median Net Worth (35–44) |
|---|---|
| Outright homeowner | ~NZ$700,000+ |
| Mortgaged homeowner | ~NZ$410,000–$480,000 |
| Renter | ~NZ$45,000–$75,000 |
The NZ$350,000–$400,000 gap between the median mortgaged homeowner and median renter at this age reflects roughly a decade of property equity accumulation. On a NZ$800,000 home (typical Auckland/Wellington area), a 40-year-old who bought at 30 has paid down approximately NZ$80,000–$120,000 in principal and benefited from capital appreciation of varying magnitude depending on timing.
Worked example — 40-year-old homeowner (bought 2018):
- Home value: NZ$850,000
- Mortgage outstanding: NZ$460,000
- Property equity: NZ$390,000
- KiwiSaver: NZ$55,000
- Term deposits and savings: NZ$22,000
- Shares: NZ$12,000
- Car: NZ$25,000
- Credit card: −NZ$4,000
- Net worth: NZ$500,000 (~68th percentile for 35–44; ~64th percentile overall)
Worked example — 40-year-old renter:
- KiwiSaver: NZ$48,000
- Term deposits: NZ$25,000
- Shares and ETFs: NZ$18,000
- Car: NZ$20,000
- Student loan: −NZ$5,000
- Net worth: NZ$106,000 (~27th percentile for 35–44; ~26th percentile overall)
KiwiSaver at 40: Where Should You Be?
By 40, KiwiSaver should be a meaningful component of your financial picture. The average balance for 40–49-year-olds is approximately NZ$52,000 — but this average includes many who joined late, contributed minimally, or withdrew for a first home.
Realistic targets by contribution history:
| Contribution Rate | Years Contributing | Estimated Balance at 40 | Projected Balance at 65 |
|---|---|---|---|
| 3% (employee) on NZ$72,000 salary since age 22 | 18 years | ~NZ$55,000 | ~NZ$350,000 |
| 6% on NZ$72,000 since age 22 | 18 years | ~NZ$80,000 | ~NZ$520,000 |
| 3%, but joined at 35 | 5 years | ~NZ$18,000 | ~NZ$220,000 |
Assumptions: 7% annual growth (growth fund); employer matching at 3%; government MTC included. All figures approximate.
The 40-year-old KiwiSaver catch-up: If you are 40 with a low balance, increasing your contribution rate now has the highest remaining impact — you still have 25 years of compounding ahead. The difference between 3% and 6% contributions on a NZ$72,000 salary is approximately NZ$40/week in take-home pay, but adds roughly NZ$175,000 to your KiwiSaver balance at 65 (at 7% growth).
Fund type audit: If you are in a conservative or default balanced fund, consider whether a growth fund is more appropriate. At 40, you have 25 years until you can access KiwiSaver — more than enough time to ride out market volatility. The long-term return difference between a conservative fund (~4% average) and a growth fund (~7% average) on a NZ$50,000 balance over 25 years is approximately NZ$200,000.
Building Net Worth Outside KiwiSaver at 40
KiwiSaver is locked until 65. Building assets outside it gives you accessible wealth for opportunities, emergencies, or early retirement.
Term deposits: Current NZ term deposit rates of 4.5–5.5% for 6–12 months make them a competitive low-risk option. A laddered term deposit strategy — spreading money across different maturity dates — provides both yield and periodic liquidity.
Index funds: Platforms like Sharesies, InvestNow, and Simplicity allow New Zealanders to invest in low-cost NZX 50 and global equity ETFs. NZ$500/month invested at 7% annual return for 25 years (to age 65) grows to approximately NZ$407,000. This builds a retirement asset that is accessible before 65 and is not subject to KiwiSaver withdrawal rules.
Investment property: If you own your home and have equity, some 40-year-olds leverage that equity to purchase an investment property. This is a leveraged investment and carries risk — mortgage costs, vacancy, maintenance, and the Brightline Test implications — but has historically been one of the highest-returning strategies available to New Zealanders with access to capital. Interest deductibility for investment properties has been restored in stages from 2024, improving the economics somewhat.
What to Prioritise at 40
1. KiwiSaver rate and fund review. If you haven’t reviewed your contribution rate and fund type recently, do so now. Increasing from 3% to 6% and moving to a growth fund are the two highest-impact decisions available.
2. Mortgage strategy. If you own, consider overpaying your mortgage. Every NZ$10,000 extra on a 6.5% mortgage saves approximately NZ$6,500 in interest and reduces the loan term. Overpayments directly increase equity and net worth.
3. Accessible savings and investments. Build a portfolio outside KiwiSaver. You may want to retire before 65, fund a business, or have a major expense arise — KiwiSaver won’t help with these. A diversified index fund portfolio gives you flexibility.
4. Income growth. The 35–44 age group earns a median of approximately NZ$72,000 (Stats NZ). If you are below this, consider whether skills investment, sector change, or negotiation could move you up — higher income is the most direct lever on net worth growth at this stage.
5. Debt management. At 40, any student loan should be well advanced (automatic repayments via PAYE). Focus on eliminating any personal loans or credit card debt before investing outside KiwiSaver.
Sources
- Stats NZ. “Survey of Household Net Worth: 2021.” stats.govt.nz
- Stats NZ. “Household income and housing-cost statistics: Year ended June 2025.” stats.govt.nz
- Financial Markets Authority. “KiwiSaver Annual Report 2024.” fma.govt.nz
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