Best ASX ETFs to Build a Diversified Portfolio

The best ASX ETFs for building a diversified portfolio in 2026 are Vanguard’s VAS and VGS, BetaShares’ A200 and NDQ, and iShares’ IVV — depending on how much local versus global exposure you want. Most Australian investors can cover the bulk of what they need with just two or three of these, at fees so low they’re barely worth stressing over.

General information only. This article does not constitute financial advice. Consider your own circumstances before making investment decisions.

Why ETFs Make Sense for Australian Investors

An ETF (exchange-traded fund) trades on the ASX like a regular share, but holds a basket of dozens or hundreds of companies underneath. You get instant diversification, no stock-picking required, and management fees that are a fraction of what active fund managers charge.

The cost difference is significant. The average Australian active managed fund charges around 0.85% per year in fees. The best index ETFs on the ASX charge as little as 0.04%. On a $100,000 portfolio held for 20 years, that fee gap alone could cost you over $30,000 in foregone returns — compounding quietly in the background.

ETFs also suit Australians specifically because the best local options distribute dividends with franking credits attached, which can offset or eliminate your dividend tax depending on your marginal rate.

The Australian Core — VAS vs A200

If you want broad Australian share exposure, you’re choosing between two funds:

Vanguard Australian Shares Index ETF (VAS) tracks the S&P/ASX 300 — the 300 largest companies on the ASX. Management expense ratio (MER): 0.07% per year. It pays quarterly distributions, most of which come with partial franking. Top holdings include BHP, Commonwealth Bank, CSL, NAB, and Westpac — in other words, a heavy dose of financials and resources.

BetaShares Australia 200 ETF (A200) tracks the ASX 200 and charges just 0.04% per year, making it the cheapest broad Australian ETF on the market. The practical difference between tracking 200 versus 300 companies is minimal — the extra 100 smaller companies in VAS add very little diversification given how dominated the index is by the top 20 stocks.

For pure cost efficiency, A200 wins. For slightly more small-cap exposure and Vanguard’s institutional reputation, VAS is hard to argue against either.

Adding Global Exposure — VGS and IVV

Holding only Australian shares means your portfolio is heavily concentrated in financials, materials, and energy — sectors that make up over 50% of the ASX. Adding global exposure fixes this immediately.

Vanguard MSCI Index International Shares ETF (VGS) tracks approximately 1,500 companies across developed markets — the US, Europe, Japan, and Canada. MER: 0.18% per year. It excludes Australia, so it pairs cleanly with VAS or A200. About 70% of VGS sits in US companies, which gives you natural exposure to tech giants like Apple, Microsoft, and Nvidia.

iShares S&P 500 ETF (IVV) is pure US exposure at 0.04% per year — the same fee as A200. If you believe in US equity markets specifically and want the tightest cost structure, IVV is worth considering over VGS, though you sacrifice the European and Japanese diversification.

A straightforward starting allocation for many Australian investors is 40% Australian ETF (VAS or A200) plus 60% international (VGS or IVV). The Australian portion delivers franking credits; the international portion delivers growth diversification.

Sector and Thematic ETFs Worth Considering

Once you have a core in place, thematic ETFs let you tilt toward specific growth areas:

BetaShares NASDAQ 100 ETF (NDQ) tracks the 100 largest non-financial companies on the NASDAQ — overwhelmingly US tech. MER: 0.48%. It’s a concentrated bet on innovation, not a diversifier. It held up remarkably through the 2025 AI infrastructure wave, but that concentration cuts both ways.

BetaShares Global Sustainability Leaders ETF (ETHI) applies an ESG screen to global large-caps and excludes fossil fuel companies. MER: 0.59%. For investors who care about where their money ends up, it’s one of the more credible ethical options on the ASX.

Keep thematic ETFs to no more than 20% of your portfolio if you’re using them — they’re seasoning, not the main meal.

A Simple Two-ETF Starting Portfolio

You don’t need complexity. A straightforward starting point that covers the world at very low cost:

• 40% A200 — cheap Australian exposure, franking credits, quarterly income
• 60% VGS — global developed market diversification, ~1,500 companies

Rebalance once a year by adding to whichever has fallen behind its target weighting. That’s it. This approach beats most active funds over 10-year-plus horizons, costs under 0.13% blended per year, and takes about 15 minutes to review annually.

Frequently Asked Questions

What is the cheapest ETF on the ASX?

BetaShares Australia 200 ETF (A200) and iShares S&P 500 ETF (IVV) are tied for the lowest management expense ratio on the ASX at 0.04% per year. For a blended global portfolio, VGS at 0.18% is also extremely competitive.

Can I build a complete portfolio using only ASX-listed ETFs?

Yes. Using a combination of a domestic ETF (VAS or A200) and an international ETF (VGS or IVV), you can gain exposure to thousands of companies across Australia and global developed markets without needing a separate international broker account. Adding a bond ETF like Vanguard’s VAF can round out the portfolio for more conservative investors.

How do I buy ETFs on the ASX?

You buy ASX ETFs through any standard Australian share trading platform — CommSec, Selfwealth, Stake, or SelfWealth are popular choices. You search for the ETF ticker (e.g. VAS, VGS, A200), place a market or limit order during ASX trading hours (10am–4pm AEST), and the units settle in two business days. Brokerage typically ranges from $0 to $9.50 per trade depending on the platform.