If you’re looking to buy an ASX ETF, you’re hardly alone. Australia’s ETF market ended 2025 at a record A$330.6bn in funds under management, having attracted A$53bn in net inflows during the year alone, nearly double the previous record set in 2024.
With 545 funds now available across the ASX and Cboe, and nearly 3 million Australians owning at least one, the decision of which ETF to buy has never been more consequential, or more confusing. More choice does not automatically mean better outcomes. Here are six things every Australian investor should work through before committing capital.
6 Things Investors Need to Consider If You Want To Buy An ASX ETF
1. The Management Expense Ratio Compounds Over Time
The management expense ratio (MER) is the annual fee charged by the ETF provider, expressed as a percentage of the fund’s value. It is deducted from the fund continuously, meaning investors never write a cheque; the cost simply drags on returns each year. That subtlety is what makes it easy to underestimate.
On a A$100,000 portfolio held for 20 years, the difference between a 0.04% MER and a 0.50% MER — both of which exist on the ASX — compounds to tens of thousands of dollars in foregone returns, assuming equivalent pre-fee performance. For broad market index ETFs, where the underlying portfolios are nearly identical, the MER is often the single most important variable distinguishing one product from another.
The fee war in Australian ETFs has been fierce. Betashares cut its A200 Australian shares ETF to 0.04% in 2023, the cheapest broad domestic equity product on the market. iShares’ IVV, which tracks the S&P 500, charges just 0.04%. Vanguard’s VAS, tracking the ASX 300, sits at 0.07%.
These are genuinely low-cost products. However, thematic ETFs (i.e. those targeting sectors like artificial intelligence, clean energy, or robotics) routinely charge between 0.40% and 0.69%, and a handful of active ETFs exceed 1%. We’re not saying there is anything inherently wrong with paying a higher fee for a product with differentiated exposure, but investors should satisfy themselves that the anticipated return premium is plausible net of the additional cost.
2. Fund Size and Liquidity Are Not Interchangeable Risks
An ETF’s assets under management (AUM) matters in two distinct ways.
First, larger funds tend to trade with tighter bid-ask spreads, meaning the price investors pay when buying and receive when selling is closer to the fund’s net asset value. A fund with A$10bn in AUM will generally have more market makers and more active secondary market trading than one with A$50m.
Second, very small funds carry closure risk. ETF providers are businesses, and a fund that fails to reach critical mass may be wound up and returned to investors, creating an unplanned taxable event. In our view, investors should generally look for a minimum of A$100–200m in AUM before committing to a product, particularly for thematic or niche exposures.
This does not mean newly launched funds should be ignored entirely. Betashares’ A200 and BGBL both launched with modest AUM and grew rapidly, ultimately becoming highly liquid products. However, that growth was not guaranteed at launch, and investors who entered early accepted closure risk in exchange for access to lower fees. It is a trade-off worth acknowledging explicitly rather than discovering retrospectively.
3. What the ETF Actually Tracks Matters as Much as What It Claims to Track
Two ETFs with identical names can hold materially different portfolios, and two ETFs with different names can hold nearly identical ones. The index methodology is what determines the portfolio, and reading it carefully is essential.
Consider two ETFs both described as tracking “global equities.” One may track the MSCI World Index, which covers approximately 23 developed markets and excludes emerging economies entirely. Another may track the MSCI All Country World Index (ACWI), which adds emerging markets including China, India, and Brazil — a materially different risk and return profile. Neither is inherently superior, but they are not the same product.
Similarly, within Australian equities, the ASX 200, the ASX 300, and equal-weight variants of each produce meaningfully different portfolios. VanEck’s MVW applies equal weighting across ASX 200 constituents rather than market-cap weighting, reducing concentration in the big four banks and BHP but also introducing different volatility characteristics. MVW returned significantly less than the ASX 200 in the year to Q1 2026 as the banks-led rally accentuated the performance gap between market-cap and equal-weight approaches. Investors who chose MVW without understanding this distinction may have been surprised.
4. Provider Differences Can Be Significant Even for the Same Thematic
It is tempting to treat ETF providers as largely interchangeable, particularly when two funds appear to offer the same exposure. They are not interchangeable, and the differences can affect both cost and long-term performance in ways that are not immediately obvious.
Australia’s ETF market is dominated by a small number of providers. Vanguard leads by FUM at approximately A$90.6bn, ahead of Betashares at A$64.1bn and iShares (BlackRock) at A$55.4bn. Together they capture over 70% of industry flows. But scale at the provider level does not guarantee the best outcome at the fund level, and investors comparing seemingly similar products across providers will frequently find meaningful differences in fees, index methodology, distribution policy, and track record.
A Concrete Example
Vanguard’s VGS and Betashares’ BGBL offer perhaps the clearest illustration of how two broadly similar ETFs from different providers can differ in important ways. Both provide exposure to international developed-market equities outside Australia, the kind of core global allocation that sits in millions of Australian portfolios.
The fee difference of 0.10% per annum is meaningful over time; on a A$200,000 holding held for 20 years, it represents a significant compounding advantage to BGBL, all else being equal. VGS has historically tracked slightly ahead of its index due to a combination of securities lending income and tax treaty benefits on US dividend withholding, which has partially offset its higher MER. BGBL is newer and has a shorter return history, which limits the ability to verify whether its lower cost fully compensates for the absence of that track record.
The choice between the two is not obvious, which is precisely the point. Investors who simply select the product with the more familiar brand name, or the lower sticker price, without understanding the nuances, may be making a suboptimal decision. Provider selection requires the same diligence as index selection.
5. Currency Exposure Is a Hidden Variable
For any ETF investing in assets denominated in foreign currencies, the Australian dollar’s movements will affect returns regardless of how the underlying assets perform. This is a dimension of risk that many investors underestimate, particularly when global equity ETFs have delivered strong returns in recent years.
When the Australian dollar weakens against the US dollar, unhedged international ETFs receive a return tailwind; the foreign assets are worth more in Australian dollar terms. When the Australian dollar strengthens, the reverse applies. Over long periods, currency movements tend to mean-revert, and most academic evidence suggests unhedged international exposure is appropriate for long-term investors. However, sequence-of-returns risk is real: a retiree drawing down on an unhedged global equity portfolio during a period of Australian dollar appreciation faces a double headwind.
Most major international ETFs available on the ASX offer both hedged and unhedged variants. Vanguard’s VGAD hedges VGS’s currency exposure back to Australian dollars; Betashares offers HGBL as the hedged counterpart to BGBL. Hedged versions typically carry a small additional cost of between 0.10% and 0.20% per annum. In our view, the decision between hedged and unhedged should be made deliberately based on the investor’s time horizon, drawdown profile, and view on the Australian dollar, rather than by default.
6. Tax Treatment Can Vary Meaningfully Between Structures
Australian investors should pay close attention to how an ETF distributes income, handles withholding tax on foreign dividends, and whether the underlying structure creates tax drag. Several important distinctions are worth understanding.
First, distributions from Australian-focused ETFs may carry franking credits, which offset Australian income tax liability for eligible investors. ETFs providing exposure to ASX-listed companies, particularly the major banks and miners, are likely to pass through franked dividends, creating a meaningful after-tax advantage for investors in lower and middle tax brackets.
Second, some ETFs (particularly those structured as managed investment trusts rather than traditional trusts), can distribute tax components in complex ways, including capital gains, foreign income, and interest. The tax treatment of an ETF should be reviewed in each investor’s individual circumstances, particularly those holding ETFs inside or outside superannuation, where the applicable tax rates differ substantially (broadly 15% in accumulation phase versus marginal rates outside super).
Third, ETFs that access foreign markets may be subject to withholding tax on dividends at the source country level. This can reduce the income an ETF actually passes through to unitholders relative to what a direct investor holding the same securities might receive. Some providers manage this more efficiently than others, Vanguard’s VGS, for instance, has benefited from a favourable US-Australia tax treaty arrangement that reduces the withholding tax drag compared to the MSCI World Index’s standard assumption.
None of this constitutes a reason to avoid international ETFs, but it does reinforce the principle that the headline MER and stated index are only part of the picture. Investors, particularly those with meaningful portfolios, should consider seeking advice from a tax professional before selecting ETF structures that carry material cross-border income components.
The Bottom Line
Australia’s ETF market is deep, competitive, and increasingly well-priced. For most long-term investors, a small number of low-cost, broadly diversified products will do most of the heavy lifting in a portfolio. The considerations above are not intended to complicate a decision that is genuinely simpler than stock selection; they are intended to ensure that simplicity is chosen deliberately rather than stumbled into.
The investor who understands why they own what they own is, in our experience, significantly better placed to hold it through difficult periods than one who simply bought the most popular ticker.
