Share your opinion and earn yourself a free Motley Fool premium report!

We are looking for Fools to join a 75 minute online independent market research forum on 15th / 16th December.

To find out more and express your interest please click here

The Cash ISA is a huge risk to your wealth. Here’s what I’d do instead

Forget stock market volatility, this Fool thinks the Cash ISA is the biggest threat to your wealth.

The content of this article was relevant at the time of publishing. Circumstances change continuously and caution should therefore be exercised when relying upon any content contained within this article.

You’re reading a free article with opinions that may differ from The Motley Fool’s Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn More.

The Cash ISA remains alarmingly popular in the UK. I say ‘alarmingly’ for the simple reason that these accounts still offer a paltry return (1.44% at best) that’s below inflation (2%). Assuming interest rates don’t jump any time soon, money stored in this kind of account will be losing value.

The eroding impact of inflation is why it makes little sense to hold cash beyond having an emergency fund for when the going gets tough. A rough rule of thumb is anywhere between three-to-six months’ worth of living costs — enough to get you through a short period of unemployment. Anything beyond this and you’re drastically reducing your chances of building any kind of wealth in your lifetime.

To achieve the latter, you’re going to need a generous proportion of whatever money you do have in assets that have been shown to outperform. And that means equities.

But isn’t investing risky?

One of the biggest misunderstandings of those who keep all their cash stored in a Cash ISA is that investing — as opposed to saving — is always riskier. News of household names going bust or investors being prevented from withdrawing their money from funds only serve to perpetuate this belief.

It’s true that cash offers far more security. After all, the first £85,000 of anyone’s savings are guaranteed by the Financial Services Compensation Scheme in the event of their bank going bust.

But while stocks and shares carry more risk in the near term, it’s also vital to recognise that the reverse is true as the years pass.

Research has consistently shown that equities outperform all other asset classes if held long enough. The most recent Barclays Equity Gilt Study, for example, revealed that UK stocks had returned 5.8% a year over the last decade compared to -2.5% for cash. It also showed that an investment held for 10 years at any point between 1899 and 2018 would have outperformed cash 91% of the time.

While there can be no guarantees that future returns will be similar to those of the past, that’s the sort of probability I’d be looking for when it comes to determining what to do with my money. 

Don’t forget the dividends

Of course, looking one year ahead is difficult enough for most of us, let alone talk of leaving money to grow for decades. Add to this the fact that there’s always the potential for markets to be volatile over a short period of time (the FTSE 100 fell around 40% in value between 2007 and 2009) and it’s no wonder many people in the UK still shun the former. 

That said, there is a silver lining to this cloud of unpredictability in the form of dividends. Receiving bi-annual or quarterly payouts from companies can be soothing, especially if the value of their shares have temporarily fallen as a result of a market crash. And if you don’t feel comfortable buying individual stocks, a low-cost exchange-traded fund tracking the FTSE 100 is a good alternative. It yields 4.4% — three times the interest of the top instant access Cash ISA.

But the power of dividends goes beyond the relief they provide in difficult times. £100 invested at the end of the Second World War would now be worth £244 after inflation. With all income reinvested, however, that same £100 would be worth £5,573 — another reminder to ignore the power of compounding at your peril.

Paul Summers has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors.

More on Investing Articles

Rolls-Royce's Pearl 10X engine series
Investing Articles

Can the Rolls-Royce share price do it again in 2026?

Can the Rolls-Royce share price do it again? The FTSE 100 company has been a star performer in recent years…

Read more »

Businessman hand flipping wooden block cube from 2024 to 2025 on coins
Investing Articles

After huge gains for S&P 500 tech stocks in 2025, here are 4 moves I’m making to protect my ISA and SIPP

Gains from S&P tech stocks have boosted Edward Sheldon’s retirement accounts this year. Here’s what he’s doing now to reduce…

Read more »

View of Lake District. English countryside with fields in the foreground and a lake and hills behind.
Investing Articles

With a 3.2% yield, has the FTSE 100 become a wasteland for passive income investors?

With dividend yields where they are at the moment, should passive income investors take a look at the bond market…

Read more »

Smart young brown businesswoman working from home on a laptop
Investing Articles

Should I add this dynamic FTSE 250 newcomer to my Stocks and Shares ISA?

At first sight, a UK bank that’s joining the FTSE 250 isn’t anything to get excited by. But beneath the…

Read more »

Investing Articles

£10,000 invested in BT shares 3 months ago is now worth

BT shares have been volatile lately and Harvey Jones is wondering whether now is a good time to buy the…

Read more »

Person holding magnifying glass over important document, reading the small print
Investing Articles

After a 66% fall, this under-the-radar growth stock looks like brilliant value to me

Undervalued growth stocks can be outstanding investments. And Stephen Wright thinks he has one in a company analysts seem to…

Read more »

Content white businesswoman being congratulated by colleagues at her retirement party
Investing Articles

Don’t ‘save’ for retirement! Invest in dirt cheap UK shares to aim for a better lifestyle

Investing in high-quality and undervalued UK shares could deliver far better results when building wealth for retirement. Here's how.

Read more »

Black woman using smartphone at home, watching stock charts.
Investing Articles

1 growth and 1 income stock to kickstart a passive income stream

Diversification is key to achieving sustainable passive income. Mark Hartley details two broadly different stocks for beginners.

Read more »