Forget a Cash ISA! I’d buy cheap UK shares in a Stocks & Shares ISA as the economy crashes

Thinking of investing your money in a Cash ISA as UK share markets shake? This could be one of the biggest mistakes you ever make, says Royston Wild.

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.

To say the world economy faces significant challenges would be an understatement. A blend of extreme Covid-19-related turbulence, Brexit, and growing trade tensions has given investors plenty to chew over. Clearly, the outlook for many UK shares is less than rosy.

In this environment, you’d be better off parking their money in something like a Cash ISA, right? Unlike UK share investors, savers in cash products like these don’t have to worry about the broader economic landscape and, therefore, the prospect of fresh stock market crashes. The value of our money is unaffected whatever the weather.

Nope!

It’s not a sentiment which I share though. You might think your money is only in danger in the event of your bank or building society going bust. And even then, the first £85,000 of your savings are protected under the Financial Services Compensation Scheme.

The letters ISA (Individual Savings Account) on dice on stacks of gold coins on a white background.

But this couldn’t be further from the truth. This is because products like Cash ISAs don’t protect your money from the ravages of inflation. UK inflation rang in at 1.7% in 2019, far exceeding the interest rates of even the best-paying Cash ISAs. So, rather than make a real-world return on their savings, Cash ISA customers effectively saw the value of their money fall.

Inflation threats

Things are unlikely to get any better for Cash ISA savers either. Fresh rounds of Bank of England base rate cutting has pulled the potential returns on these products even lower. And even more central bank rate reductions could be in the offing as Britain responds to Brexit and Covid-19. It’s a situation that threatens to push inflation higher over the medium term as well.

I believe Cash ISAs are an awful way for individuals to invest their cash. I hold money in one of these low-paying products, but it’s not because of the return. I use them as a tax-efficient way to hold cash I might need at short notice. Instead, I buy UK shares in a Stocks and Shares ISA in order to build a handsome nest egg for retirement.

Making fortunes with UK shares

And let me show you why. The average annual return that a long-term investor in UK shares receives is between 8% and 10%. Clearly, over the long run, these investors still make returns that outstrip those on offer from other savings or investment methods. Indeed, compare that with the paltry sub-1% interest rates that Cash ISA investors receive.

Based on those rates of return, I can expect £200 invested each month in UK shares in my Stocks and Shares ISA to make me between £281,000 and £412,000 over 30 years. I would have made just £83,866 had I decided to park my money in a 1%-paying Cash ISA instead of buying UK shares.

So don’t stop buying stocks because of the uncertain economic environment. There are still plenty of cheap UK shares that could help you make an ISA fortune over the long run. And The Motley Fool can help you to dig these out.

Royston Wild 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

Close-up image depicting a woman in her 70s taking British bank notes from her colourful leather wallet.
Investing Articles

How much do I need in an ISA for a £668 monthly second income?

One popular approach to building a second income is through becoming a landlord. But how does that compare to using…

Read more »

Happy woman commuting on a train and checking her mobile phone while using headphones
Investing Articles

In just 2 years, Vodafone shares would have turned £10,000 into this much…

The Vodafone transformation is going well, and the shares have had a brilliant couple of years. Can the momentum and…

Read more »

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

Down 9%! Here are 3 dangers that are emerging for Rolls-Royce shares

What has sent Rolls-Royce shares down sharply in the FTSE 100 over the past couple of days? Ben McPoland takes…

Read more »

Businessman with tablet, waiting at the train station platform
Growth Shares

Here’s what fresh legal news could mean for Lloyds shares

Jon Smith digests the latest news about the UK car loan scandal and outlines what it means for Lloyds shares,…

Read more »

Middle-aged white man wearing glasses, staring into space over the top of his laptop in a coffee shop
Investing Articles

A new risk has emerged for Rolls-Royce and it could send the share price back to 1,010p

All of a sudden, the Rolls-Royce share price is falling. Edward Sheldon believes that it could go lower before it…

Read more »

Night Takeoff Of The American Space Shuttle
Investing Articles

Here’s how Britons can invest in SpaceX on the FTSE 100

Mark Hartley takes a look at the various options available to UK investors keen on SpaceX exposure, and details one…

Read more »

Investing Articles

The BT share price is on fire in 2026. Is there still time to buy?

The BT share price has had a cracking couple of years, as the company heads towards escalating free cash flow…

Read more »

Illustration of flames over a black background
Investing Articles

These 2 Stocks and Shares ISA buys are on fire in 2026

The new Stocks and Shares ISA season is seeing a few interesting changes to the companies making up investors' latest…

Read more »