Expense Ratio (ETF): The Hidden Annual Fee Eating Into Your Returns

An ETF’s expense ratio is the annual percentage fee deducted from the fund’s net asset value to cover management, administration, and operating costs, charged continuously rather than billed separately, so investors never see the fee as a line item but feel it in slightly lower returns every year.

Not financial advice. All figures for educational reference only. Data as at November 2026.

Last updated: November 2026

Key Takeaways

• Expense ratios on Singapore-accessible ETFs typically range from about 0.07% for large US-domiciled broad-market ETFs to over 0.6% for niche thematic or actively managed ETFs.
• The fee is deducted daily from the fund’s NAV, which is why it never appears as a separate charge on a brokerage statement.
• A seemingly small difference in expense ratio compounds meaningfully over a long holding period — even 0.3% a year can cost tens of thousands of dollars over several decades on a large portfolio.
• Expense ratio is only one part of an ETF’s total cost of ownership; investors should also weigh bid-ask spread, tracking error, and brokerage commissions.
• Lower expense ratios generally favour passive, broad index-tracking ETFs over actively managed or niche thematic funds, which charge more for specialised management.

What Is Expense Ratio?

Every exchange-traded fund has running costs — paying the fund manager, custodian, auditor, index licensing fees, and administrative overhead — and the expense ratio is simply the shorthand for all of that, expressed as an annual percentage of the fund’s assets. Unlike a brokerage commission or a platform fee, the expense ratio is never billed to the investor directly. Instead, it is deducted continuously from the fund’s net asset value, meaning an ETF with a 0.1% expense ratio quietly reduces the fund’s daily NAV by roughly 1/365th of that 0.1% every single day, regardless of whether the market is up or down.

This is precisely why the expense ratio is one of the most important, and most frequently underestimated, numbers for a Singapore ETF investor to check before buying. Because the fee is invisible on a day-to-day basis — there is no line item on your brokerage statement that says ‘expense ratio charged: SGD X’ — it is easy to overlook in favour of more visible factors like an ETF’s recent performance or dividend yield. Yet over a multi-decade holding period, the difference between a 0.07% expense ratio and a 0.65% expense ratio compounds into a meaningfully different ending portfolio value, even if the two funds track similar underlying exposures.

Singapore investors building long-term portfolios through ETFs — whether via a brokerage, a robo-advisor like Syfe or Endowus, or directly on SGX — should treat expense ratio as a first-order filter when comparing funds with similar investment objectives, since it is one of the few variables an investor can know with certainty in advance, unlike future performance.

How Does Expense Ratio Work in Singapore?

In Singapore, ETFs are available from two main sources: those listed directly on SGX, and those listed on overseas exchanges (most commonly the US, London, or Hong Kong) that Singapore investors access through a brokerage or robo-advisor platform. Expense ratios vary meaningfully across both groups. Broad market index ETFs tracking something like the S&P 500 or the MSCI World Index, from large issuers like iShares or Vanguard, often carry expense ratios as low as 0.03% to 0.09% because they benefit from enormous economies of scale and simply replicate a well-defined index with minimal active decision-making.

By contrast, ETFs tracking Singapore REITs, dividend strategies, or thematic exposures (such as technology or clean energy) typically carry higher expense ratios, often in the 0.5% to 0.8% range, reflecting smaller fund sizes, more complex index methodologies, and sometimes higher trading costs for the underlying securities. Actively managed ETFs, which are a growing category globally, generally sit at the highest end, as they pay for a portfolio manager’s ongoing security selection rather than simply tracking a published index.

It is worth noting that expense ratio is not the only cost an ETF investor bears. Tracking error — how closely the ETF’s actual return matches its benchmark index after costs — and the bid-ask spread an investor pays when buying or selling on the exchange both add to the real, total cost of holding an ETF, meaning a fund with a slightly higher expense ratio but tighter tracking and spreads can sometimes be cheaper in practice than a lower-fee fund with poor liquidity.

Expense Ratio Example

A Singapore investor is deciding between two ETFs offering similar global equity exposure: Fund A has an expense ratio of 0.07% and Fund B has an expense ratio of 0.55%. Both are expected to deliver the same 7% gross annual return before fees, and the investor plans to invest SGD 100,000 and hold for 25 years without adding further contributions.

After fees, Fund A compounds at an effective 6.93% per year, growing SGD 100,000 to roughly SGD 541,000 over 25 years. Fund B compounds at an effective 6.45% per year, growing the same SGD 100,000 to roughly SGD 462,000 over the same period. The 0.48 percentage point difference in expense ratio costs this investor approximately SGD 79,000 in lost compounding over 25 years, purely from fee drag on an otherwise identical gross return.

Advantages of Expense Ratio

• Known and disclosed upfront. Unlike future performance, every ETF’s expense ratio is published in its fact sheet and prospectus, letting investors compare costs with certainty before investing.
• Automatically deducted, no action required. Investors never need to pay the fee separately or remember to settle an invoice — it is built into the fund’s daily NAV calculation.
• Competition has driven costs down over time. Growing ETF adoption globally has pushed expense ratios on major broad-market funds to historic lows, benefiting long-term investors.
• A clear, comparable metric across funds. Because it is standardised as an annual percentage, expense ratio makes it straightforward to rank similar ETFs by cost.

Risks and Limitations

• Compounds silently over time. Because the fee is invisible day-to-day, investors can underestimate its long-term impact on portfolio value, especially over multi-decade horizons.
• Not the only cost that matters. Focusing solely on expense ratio while ignoring tracking error, bid-ask spreads, or brokerage commissions can lead to a misleadingly low estimate of total holding cost.
• Lower cost does not guarantee better returns. A cheap ETF that poorly tracks its index, or that holds an underperforming market segment, can still deliver worse net returns than a slightly pricier, better-run fund.
• Niche and thematic ETFs can mask high fees behind exciting narratives. Investors chasing a hot theme may overlook an expense ratio several times higher than a broad-market alternative.
• Currency-hedged share classes often cost more. An ETF share class that hedges foreign currency exposure back to SGD typically carries a materially higher expense ratio than the unhedged version of the same fund, a cost investors sometimes overlook when comparing options.

Typical Expense Ratios by ETF Category

Source: Fund fact sheets of major Singapore-accessible ETFs, 2026.

The Bottom Line

The expense ratio is one of the few things about an ETF’s future an investor can actually know with certainty before buying, which makes it an unusually powerful variable to control in long-term portfolio construction. For Singapore investors building wealth over decades, consistently choosing lower-cost funds for a given exposure — without ignoring tracking quality and liquidity — is one of the simplest, most evidence-backed ways to improve long-run net returns.

Frequently Asked Questions

Related Terms

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• Leveraged ETF Singapore
• Actively Managed Fund vs Index Fund Singapore
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