Choosing the right KiwiSaver provider is a decision that can be worth tens of thousands of dollars over your saving lifetime — primarily through the compounding effect of fees and long-term investment returns. With over 20 providers in New Zealand, the choice can feel overwhelming.
This guide cuts through the noise: we compare the major NZ KiwiSaver providers across the metrics that actually matter — fees, long-term performance, fund range, ethical options, and usability — so you can find the right provider for your situation.
How to use this guide: We cover the key providers in detail below. For individual deep-dives, see the dedicated review for each provider. For the full framework on choosing between fund types, see How to Choose a KiwiSaver Fund.
What to Compare When Choosing a KiwiSaver Provider
Before diving into provider rankings, it helps to understand what the key variables are — because the “best” provider depends on what you value.
1. Annual fees
Fees are the single most controllable factor in your long-term KiwiSaver balance. Two types matter:
- Management fee (% of balance): charged as a percentage of your total balance each year. A 0.5% difference on a $100,000 balance is $500/year — money not compounding.
- Member fee ($): a fixed annual dollar fee, regardless of your balance. At small balances, this can represent a high effective percentage. At large balances, it becomes relatively insignificant.
2. Long-term investment performance
Past returns do not guarantee future results, but 5–10 year annualised returns (net of fees) are a useful indicator of how well a fund has been managed. Always compare returns after fees — a high-return fund that charges 1.5% may underperform a lower-return fund charging 0.3%.
3. Fund range
Does the provider offer the fund type you need? Some providers offer only a handful of funds; others offer 10+ options across cash, conservative, moderate, balanced, growth, aggressive, and specialised ethical funds.
4. Ethical / ESG options
If you care about where your money is invested, check whether the provider offers ethical screening. Providers like Pathfinder, Simplicity, and Kernel have strong ESG credentials; the big banks vary significantly.
5. Digital tools and usability
How easy is it to check your balance, switch funds, make voluntary contributions, or contact support? Digital-first providers (Kernel, Koura, Summer) typically have the most modern interfaces.
KiwiSaver Provider Comparison — Growth Funds (2026)
Growth funds are the most widely chosen fund type for working-age members. Here is how the major providers’ growth funds compare on fees and 5-year performance:
Data as at April 2026. Past performance is not a guarantee of future returns. Management fees are approximate annual percentages. Always verify current fees and returns directly with the provider before making a decision.
| Provider | Fund name | Mgmt fee (approx) | Member fee | 5-yr return (p.a., est.) |
|---|---|---|---|---|
| Simplicity | Growth | 0.31% | $30/yr | ~9.5% |
| Kernel | High Growth | 0.25%–0.45% | $60/yr (waived under $5k) | ~10.2% |
| Milford | Active Growth | 0.85% | $0 | ~11.5% |
| Pathfinder | Growth | 0.89% | $30/yr | ~8.8% |
| Fisher Funds | Growth | 0.99% | $36/yr | ~9.1% |
| Booster | Growth | 0.69% | $21/yr | ~9.0% |
| Koura | Growth | 0.63% | $0 | ~8.7% |
| ANZ | Growth | 0.85% | $24/yr | ~8.9% |
| ASB | Growth | 0.88% | $30/yr | ~8.6% |
| BNZ | Growth | 0.49% | $18/yr | ~8.8% |
| Westpac | Growth | 0.60% | $0 | ~8.4% |
| Kiwibank | Growth | 0.55% | $30/yr | ~8.5% |
| SuperLife | Growth | 0.60% | $12/yr | ~9.0% |
Fees and returns are indicative only and change regularly. This table is for comparative orientation, not investment advice. Verify all figures at sorted.org.nz/tools/kiwisaver-fund-finder and directly with each provider.
Our Picks by Category
Best for low fees: Kernel and Simplicity
Both Kernel and Simplicity use passive index investing, which keeps costs low. Kernel’s management fee starts at 0.25% for some funds, with a $60/year member fee waived for balances under $5,000. Simplicity charges 0.31% with a $30/year member fee, and donates 15% of management revenue to charity.
For large balances (over $100,000), both represent exceptional value compared to the bank providers. For small balances (under $10,000), the fixed member fee matters more — Milford and Westpac’s $0 member fee becomes relevant.
See individual reviews: Kernel KiwiSaver Review | Simplicity KiwiSaver Review
Best for long-term performance: Milford
Milford’s Active Growth fund has been among the top-performing KiwiSaver growth funds over 5 and 10 year periods. Their active management approach has historically justified the higher fee for long-term investors. However, past outperformance is not guaranteed to continue, and the 0.85% management fee is meaningfully higher than passive alternatives.
See: Milford KiwiSaver Review 2026
Best for ethical investing: Pathfinder
Pathfinder is a specialist ethical investment manager. Their KiwiSaver funds apply rigorous ESG (environmental, social, governance) screening — avoiding fossil fuels, weapons, gambling, tobacco, and other excluded sectors. Returns have been competitive with growth peers while maintaining strong ethical credentials.
See: Pathfinder KiwiSaver Review
Best for bank convenience: BNZ or Kiwibank
If you want your KiwiSaver with your main bank — and you bank with BNZ or Kiwibank — both offer competitive fees relative to the other bank providers. BNZ’s growth fund fee of 0.49% is notably lower than ANZ (0.85%) and ASB (0.88%). Kiwibank at 0.55% is also competitive.
ANZ and ASB dominate KiwiSaver membership by number, but not by fee competitiveness. If you are currently with ANZ or ASB purely out of default inertia, it may be worth reviewing.
See: BNZ KiwiSaver Review | Kiwibank KiwiSaver Review | ANZ KiwiSaver Review | ASB KiwiSaver Review
Best for personalised portfolios: Koura and Summer
Koura and Summer are digital-first providers that build customised portfolios based on your individual preferences — time horizon, risk tolerance, and values. Both are relatively new but have grown quickly. Their fees are competitive with the mid-range providers.
See: Koura KiwiSaver Review | Summer KiwiSaver Review
Best for Islamic-compliant investing: Amanah
Amanah KiwiSaver is designed for Muslim New Zealanders seeking Shariah-compliant investment options — avoiding interest (riba), pork, alcohol, gambling, and weapons industries. It is the only dedicated Islamic KiwiSaver scheme in NZ.
Bank vs Independent Provider: What’s the Difference?
Many New Zealanders default to the same KiwiSaver provider as their bank. Here is the honest comparison:
Bank providers (ANZ, ASB, BNZ, Westpac, Kiwibank):
- Convenient — integrated with your bank app and accounts
- Familiar brand and customer service
- Generally higher fees than independent providers (ANZ, ASB in particular)
- Large fund ranges with multiple fund type options
- Strong first home withdrawal support via existing banking relationships
Independent providers (Milford, Simplicity, Kernel, Fisher, Booster, Pathfinder):
- Often lower fees — especially passive providers
- Specialist focus on investment outcomes
- Some have stronger long-term performance track records
- Switching to one is straightforward and free — see Switching KiwiSaver Providers
- No penalty for changing — your employer contributions redirect automatically
The most important question is not which bank you use — it is whether your current provider’s fees and fund type are appropriate for your age and goals.
The Fee Drag Effect — Why It Matters
To illustrate the cumulative cost of higher fees, consider two investors with identical contributions over 30 years:
| Scenario | Balance at start | Monthly contribution | Annual return (gross) | Fee | Balance at 30 years |
|---|---|---|---|---|---|
| Low fee | $10,000 | $300 | 8% | 0.35% | ~$452,000 |
| High fee | $10,000 | $300 | 8% | 1.20% | ~$380,000 |
Difference: ~$72,000 — from fees alone, with identical contributions and gross returns.
This is why fee comparison is so important, and why passive low-fee providers like Simplicity and Kernel have attracted so many members despite being smaller and newer than the banks.
How to Switch KiwiSaver Providers
Switching is free, simple, and takes 2–4 weeks. You do not need to contact your old provider — the new one handles everything.
Steps:
- Choose your new provider and fund type
- Apply online through the new provider’s website
- Provide your IRD number and confirm your details
- The new provider notifies IRD and initiates the transfer
- Your balance transfers within 2–4 weeks
- Future employer contributions redirect automatically
There are no exit fees, no tax events triggered, and no gaps in investment — your money stays invested throughout the transfer period.
For full detail, see Switching KiwiSaver Providers Guide.
Frequently Asked Questions
Is there one “best” KiwiSaver provider in NZ?
No. The best provider depends on your balance, age, fund type preference, ethical priorities, and whether you value digital tools or branch access. Kernel and Simplicity are hard to beat on fees; Milford has the strongest performance track record; Pathfinder leads on ethics. The big banks offer convenience but generally charge more.
Should I stay with my bank’s KiwiSaver?
Only if it genuinely offers competitive fees and a fund that suits your time horizon. ANZ and ASB have the most KiwiSaver members in NZ, but their growth fund fees (0.85%–0.88%) are among the highest in the market. If you have been with them by default rather than by choice, it is worth reviewing.
Does switching KiwiSaver providers affect my first home withdrawal eligibility?
No. Your 3-year eligibility clock is based on your total KiwiSaver membership, not your membership with any single provider. Switching does not reset the clock.
Can I have more than one KiwiSaver account?
No — you can only have one active KiwiSaver account at a time. If you accidentally enrol with a second provider, IRD will consolidate them.
How often should I review my KiwiSaver provider?
A meaningful review every 3–5 years is reasonable, or whenever you hit a major life milestone (approaching retirement, first home purchase, significant salary increase). Fee structures and fund ranges do change over time.
Are independent providers safe? Are they regulated?
Yes — all KiwiSaver providers must be licensed by the Financial Markets Authority (FMA) under the Financial Markets Conduct Act 2013. They are also required to have a supervisor (an independent trustee company) holding assets on behalf of members. Your KiwiSaver savings are held separately from the provider’s own assets — if a provider became insolvent, your funds are protected.
Summary — Provider Recommendations by Priority
| Priority | Recommended providers |
|---|---|
| Lowest fees | Kernel, Simplicity |
| Best long-term performance | Milford, Fisher Funds |
| Ethical investing | Pathfinder, Simplicity, Kernel |
| Bank convenience | BNZ, Kiwibank (most competitive on fees among banks) |
| Personalised / digital | Koura, Summer |
| Islamic-compliant | Amanah |
| Large balance, passive | Kernel, Simplicity, SuperLife |
| Small balance, no member fee | Milford, Westpac |
This guide provides general information only and does not constitute personalised financial advice. For advice specific to your situation, speak with a licensed financial adviser. Find one through the FMA’s adviser register or sorted.org.nz. Fee and performance data should be verified directly with providers and at sorted.org.nz before making any decision.