$100,000 is a six-figure milestone that opens all investment options in New Zealand and where the decisions you make about fees, tax, and allocation have the largest absolute impact.
At $100,000, NZ-domiciled PIE funds avoid FIF tax complexity. Low-fee diversified options include the Simplicity Growth Fund (0.23% p.a., no member fee), InvestNow's Foundation Series (fees vary by fund, from ~0.03% up to 0.37%) and Kernel (0.25%). Consider a fee-only financial adviser: the fee is justified at this scale. Splitting across too many funds or platforms adds complexity without much benefit. Investing in a lump sum or over 6 months is more common than spreading it over 12+ months.
The FIF Decision Is Clear at $100,000
At $100,000, the case for NZ-domiciled PIE funds over direct US ETF purchases (VOO, SPY) is overwhelming:
| Strategy | Annual fee | FIF tax (33% marginal rate) | Total annual cost |
|---|---|---|---|
| NZ PIE fund (Simplicity 0.23%) | $230 | $0 | ~$230 |
| NZ PIE fund (InvestNow Foundation Series Total World Fund, 0.06%) | $60 | $0 | ~$60 |
| Direct VOO via Hatch (0.03%) | $30 | $1,650 (5% × $100k × 33%) | ~$1,680 |
The 0.03% expense ratio of VOO appears cheap. But FIF tax makes the total cost roughly 7–8× more expensive than a NZ PIE fund. This is one of the most important NZ-specific investing insights for portfolios above $50,000.
→ See: FIF Tax NZ — Complete Guide
Example Allocations at $100,000
These are illustrative structures, not recommendations; the funds named are examples with their fees.
For long time horizon (10+ years, age under 55)
Option A — Single fund (simplest)
| Fund | Platform | Fee | Annual cost |
|---|---|---|---|
| Simplicity Growth Fund | Simplicity | 0.23% | $230/year |
Simplicity’s Growth Fund invests in global shares, bonds, and NZ shares in a single diversified fund. Its fee was cut from 0.25% to 0.24% on 1 September 2025 and to 0.23% from 1 October 2026 (Simplicity’s eighth fee cut since 2016), with no member fee, making it one of the cheapest diversified funds available in NZ. The worked figures on this page use the 0.23% rate.
Option B — Two funds (slightly more control)
| Allocation | Fund | Platform | Fee |
|---|---|---|---|
| $80,000 (80%) | Foundation Series Total World Fund | InvestNow | 0.06% |
| $20,000 (20%) | Kernel NZ 20 Fund | Kernel | 0.25% |
Blended: ~0.10% = $98/year. More control over geographic split — though it now spans two platforms, since InvestNow’s Foundation Series range doesn’t include a dedicated NZ-shares fund. (Foundation Series funds also carry a 0.50%/0.50% buy-sell transaction fee on top of the annual fee.)
Option C — Kernel combination
| Allocation | Fund | Platform | Fee |
|---|---|---|---|
| $60,000 (60%) | Kernel Global 100 Fund (unhedged) | Kernel | 0.25% |
| $20,000 (20%) | Kernel Hedged Global 100 Fund | Kernel | 0.25% |
| $20,000 (20%) | Kernel S&P 500 Fund | Kernel | 0.25% |
Provides global exposure with partial currency hedge. Blended: 0.25% = $250/year (Kernel currently charges the same 0.25% fee on its hedged and unhedged Global 100 funds).
For medium time horizon (5–10 years) or moderate risk tolerance
A lower growth exposure of 60–70% is common:
| Allocation | Asset class |
|---|---|
| 60–70% | Global / NZ shares (growth) |
| 20–25% | Bonds (defensive) |
| 10–15% | Conservative / balanced fund |
Most PIE fund providers (Simplicity, InvestNow, Kernel) offer balanced or conservative fund options.
Should You Use a Financial Adviser?
At $100,000, the fee for a single session with a fee-only financial adviser ($200–$500/hour) is absolutely justified. A good adviser can:
- Confirm appropriate asset allocation for your situation
- Review tax structure (PIR rate, trust structure, joint ownership)
- Integrate with your KiwiSaver, mortgage, and insurance picture
- Provide a written Investment Policy Statement (IPS)
Fee-only advisers charge by the hour and have no incentive to sell products. Search the Financial Advice Provider register (FMA) or ask for referrals. Avoid commission-based advisers for straightforward index fund investing.
Lump Sum or Spread Over Time?
Research favours lump sum at all amounts — but at $100,000, the emotional stakes are higher. Options:
- Invest all at once → mathematically optimal two-thirds of the time
- Invest $50k now, $50k over 6 months → reduces worst-case psychological outcome
- Invest over 12 months → usually too long; 12 months of partial investment significantly reduces compounding
For most investors at this amount, the 50% now / 50% over 6 months approach is a reasonable balance.
What $100,000 Grows To
| Return p.a. | 10 years | 20 years | 30 years |
|---|---|---|---|
| 5% | $162,889 | $265,330 | $432,194 |
| 8% | $215,892 | $466,096 | $1,006,266 |
| 10% | $259,374 | $672,750 | $1,744,940 |
Pre-tax, pre-fee, illustrative only.
Adding $1,000/month at 8% return after the initial $100,000: approximately $1.06 million after 20 years.
Annual Fee Impact on $100,000
| Fee | Annual cost | 20-year cost (money lost to fees) |
|---|---|---|
| 0.23% (Simplicity) | $230 | ~$19,500 |
| 0.06% (InvestNow Foundation Series Total World Fund) | $60 | ~$5,200 |
| 0.25% (Kernel) | $250 | ~$21,100 |
| 1.10% (active fund) | $1,100 | ~$86,300 |
| 1.50% (active fund) | $1,500 | ~$113,700 |
Assumes 8% gross return, compounding, no additional contributions. Fee drag compounds over time. Recomputed as FV(gross return) − FV(gross return − fee) over 20 years.
The difference between a 0.23% fund and a 1.10% active fund is roughly $67,000 in fees over 20 years on a $100,000 initial investment.
Tax Check at $100,000
PIR rate: Ensure this is set correctly. On $100,000 earning a 5% PIE return ($5,000), the tax difference between PIR 17.5% ($875) and PIR 28% ($1,400) is $525/year — check PIR Rate NZ.
FIF: Avoided entirely through NZ PIE funds — the key decision at this amount (as shown in the table above).
What to Avoid
- Splitting across 10+ funds “for diversification” — a global index fund is already diversified across 1,500+ companies
- Investing in direct property with $100,000 as a deposit — the leverage and illiquidity risks need careful consideration at this scale
- Keeping any amount above $50,000 in a savings account long-term — the real return after inflation is negative
- Making investment decisions based on recent news or market predictions
Where to check the latest data
Rates, fees and returns change often. Before deciding, check current figures yourself:
- Sorted Smart Investor: compares fees, returns and risk levels of KiwiSaver and managed funds.
- Disclose register: holds each fund's product disclosure statement and quarterly fund updates.
- Financial Service Providers Register: shows whether a provider is registered to offer financial services in New Zealand.
- The provider's own website: has its current rates, fees and full terms; these change more often than any comparison page.