Buying ASX ETFs? Watch out for this red flag

You need to check this number before buying your next ETF.

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Investing in exchange-traded funds (ETFs) seems to grow more popular on the ASX with each passing year. ASX investors seem to love buying ASX ETFs, likely for their simple, hands-off nature and cheap market access, which they are well known for.

The ASX's most popular ETFs, such as the Vanguard Australian Shares Index ETF (ASX: VAS), seem to increase their assets under management like clockwork every month. And the number of smaller, thematic ETFs has exploded in recent years. These days, you can pretty much find any ETF you can think of on the ASX.

This trend, in my view, is largely a happy one. ETFs can give ASX investors cheap access to industries and markets that were previously unavailable (or available but prohibitively expensive) to Australian investors. Australians who might have never taken the plunge of buying individual ASX shares are happy to part with their dollars when offered cheap, market-wide index funds that can simply be put into the proverbial bottom drawer and never touched again.

However, ETF investing is not without its potential risks and downsides. Today, I'm going to discuss what I consider the biggest red flag for ASX investors to watch out for when considering an ETF investment.

A businesswoman looks unhappy while she flies a red flag at her laptop.

Image source: Getty Images

A big red flag when buying ASX ETFs

Any ASX ETF can theoretically find a happy place in an investor's portfolio. Provided it aligns with their goals and risk tolerances, of course. However, I think there is one factor that should be assessed above all else when analysing your next ETF investment. That factor is the fee that the ETF will charge you.

All ASX ETFs charge their investors an annual fee for their services. That's fair enough. After all, ETFs need to be maintained, their portfolios kept in line, their dividends distributed, and their investors kept informed. That doesn't come free.

But although all ETFs are equal when it comes to imposing these fees, some are more equal than others. It is this fee that ASX ETF investors need to be discerning about.

Fees on ASX ETFs are wide-ranging. Some of the cheapest on the market go for under 0.05% per annum. That's $5 a year for every $10,000 invested. Others are as high as 1%, or even greater.

Whether an ETF charges a fee of 0.05%, 0.5%, or 1% might not sound like a matter of great importance. But it is if you value your cash. Sure, that kind of difference isn't enough to make a meaningful difference to one's returns over a year or two. But it certainly starts to add up over five, ten, or 20 years.

When paying 1% can cost you a fortune

Just as returns from investments compound, so too do the lost potential returns of money that is eaten up by these fees. To illustrate, let's assume one investor puts $100,000 into one ETF that is fee-free. Another investor puts the same amount into a fund that asks 1% per annum. If both ETFs return an average of 10% over 20 years, our 1% fund will turn that $100,000 into just over $600,000. But our fee-free fund will yield almost $730,300.

Yep, that 1% difference is worth more than $130,000 over two decades.

As such, all ASX investors who are thinking about buying an ASX ETF need to consider how much dead money their fund will take from them. A high fee, particularly one over 1% per annum, is, in my view, one of the biggest red flags an ETF can wave at us as investors. Ignore it at your money's peril.

Motley Fool contributor Sebastian Bowen has positions in Vanguard Australian Shares Index ETF. The Motley Fool Australia's parent company Motley Fool Holdings Inc. has no position in any of the stocks mentioned. The Motley Fool Australia has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Scott Phillips.

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