How an ETF expense ratio eats into long-run returns.
Lost to fees
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Value with no fees
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Value after fees
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Your breakdown
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A fee charged every year is not a small thing
An expense ratio looks tiny on paper. Half a percent, a fifth of a percent, the difference barely registers when you are choosing a fund. The problem is that it is not charged once. It is skimmed off your holding every single year, and it compounds against you in exactly the same way returns compound for you. Over a working lifetime, the gap between a cheap tracker and a pricey one is not a rounding error. It can be a six-figure sum. This calculator runs your money twice, once at the gross return and once at the return after the fee, and shows the difference as the drag in dollars.
The tool is aimed at anyone choosing between Hong Kong-listed or globally listed ETFs, or comparing a low-cost index fund against an actively managed one. It strips the decision down to the one variable that is fully within your control: cost.
How the drag compounds
Each year the fund grows at the gross return, then the expense ratio is effectively deducted, leaving a net return. The calculator models this as growth at the gross rate for the fee-free path and growth at the gross rate minus the expense ratio for the real path. Because the fee comes out of a balance that would otherwise have kept compounding, every dollar lost to fees this year is also a dollar that never earns returns in all the years that follow. That is why the drag grows faster than the headline fee suggests, and why it widens most in the later years when the balance is largest.
There is a distinctly Hong Kong advantage layered on top. The territory levies no capital gains tax and does not tax dividends, so your investment growth is not eroded by tax the way it would be elsewhere. That makes keeping costs low even more powerful here, because fees become the single biggest controllable leak in the bucket. Tax is not taking a slice, so the fund manager's charge stands out all the more.
$500,000 over 25 years at a half-percent fee
Picture $500,000 invested for 25 years, growing at a 7 percent gross annual return, in a fund charging a 0.5 percent expense ratio. The net return becomes 6.5 percent. Compounding the lump sum at each rate over the 25 years produces two end values, and the difference is what the fee cost you.
A half-percent charge quietly erased roughly $300,000, which is more than half of what you originally put in. That is the cost of one fee decision, repeated annually for 25 years. The chart shows the two paths fanning apart as the years pass.
What investors ask about fund costs
Is a 0.5 percent fee really worth worrying about?
Over a year or two, barely. Over decades, very much so. In the example above, dropping from 0.5 percent to a more typical index-tracker fee near 0.1 percent would hand most of that $300,000 back to you. The longer your horizon and the larger your balance, the more a small fee difference matters, which is why young investors with forty years ahead should be the most cost-conscious of all.
Does the calculator account for trading costs and stamp duty?
No, it isolates the ongoing expense ratio so you can see its pure effect. Buying and selling shares in Hong Kong can attract brokerage and stamp duty, but those are one-off transaction costs rather than the annual drag this tool measures. For a buy-and-hold ETF investor, the recurring expense ratio is usually the dominant long-run cost, which is why it gets the spotlight here.
Will the fund's dividends be taxed in Hong Kong?
Dividends are not taxed in the hands of a Hong Kong investor, and there is no local capital gains tax when you sell at a profit. Note that some funds hold foreign shares that suffer withholding tax at source before the dividend ever reaches the fund, which is a separate matter from Hong Kong tax. Within Hong Kong itself, the growth and income are not taxed, so fees remain your main leakage.