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Mercer KiwiSaver Review NZ 2026 — Fees, Funds and Performance

Updated

Mercer is a global investment consulting and funds management firm operating in over 40 countries. In NZ, Mercer operates the Mercer KiwiSaver scheme — one of the nine government-appointed default providers since 2021.


Mercer at a Glance

FeatureDetail
Provider typeGlobal investment manager (corporate/institutional focus)
Parent companyMercer (part of MMC global)
Default providerYes (from 2021)
Funds availableMultiple — including conservative, moderate, balanced, growth, high growth options
Growth fund fee~0.45–0.70%
Member feeVaries — check current PDS
PIE fundYes
FMA regulatedYes

Mercer’s Investment Approach

Mercer uses a multi-manager approach — investing across multiple underlying fund managers selected for their expertise in different asset classes. This means:

  • Your Mercer KiwiSaver fund invests through other fund managers, not directly in the market
  • Mercer acts as the “manager of managers”
  • Broad diversification across managers and asset classes
  • More complex structure than a simple index or single-manager fund

Mercer Fund Range

FundApprox. fee
Conservative~0.40%
Moderate~0.45%
Balanced~0.50%
Growth~0.60%
High Growth~0.65%
Shares~0.70%

Fees approximate — confirm in current PDS. Fund range and names may change.

Mercer’s fee range (0.40–0.70%) is notably lower than most active single-manager providers (Milford, Generate, Fisher Funds at 0.85–1.30%), making it a mid-market option.


Fees — How Mercer Compares

ProviderGrowth fund fee
Kernel~0.25%
Simplicity~0.31%
Mercer~0.60%
Booster~0.50%
ANZ~1.06%
Milford~1.05%

Mercer sits in a middle ground — more expensive than passive index funds, but significantly cheaper than high-fee active managers.


Default Provider Status

As a government-appointed default provider, Mercer must:

  • Offer a balanced fund as the default option
  • Meet FMA standards for fees, disclosure, and governance
  • Accept any member allocated to them by IRD

This doesn’t mean Mercer is the best option — but it has been vetted by the government as a suitable provider for members who make no active choice.


Pros

  • Mid-range fees (cheaper than most active managers)
  • Default provider status — government-vetted
  • Multi-manager diversification
  • Comprehensive fund range including moderate and high growth tiers
  • Global resources and expertise

Cons

  • More expensive than passive index providers
  • Multi-manager structure adds complexity and potential fee layers
  • Less NZ brand recognition vs bank providers
  • Less commonly reviewed or discussed in NZ media

Who Is Mercer Suited To?

Mercer is worth considering for:

  • Members who want a mid-range fee option with broader fund choice than bank providers
  • Corporate or employer scheme members (Mercer has strong corporate relationships)
  • Members who were allocated there as a default and find the fee and fund range acceptable

For most individual retail members comparing options, Simplicity or Kernel offer lower fees with comparable or better after-fee performance.


How to Join Mercer

Join or enquire at mercerkiwisaver.co.nz.