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

Here’s proof that Cash ISAs destroy your wealth! I’d rather buy stocks to fund my retirement

Thinking of putting your money away in a Cash ISA or similar product? Well I’d think again, 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.

Broadly speaking, there are very few mistakes a saver can make that are worse than putting their money in a low-yielding account like a Cash ISA and expecting to make decent returns.

I’m not going to say that cash accounts don’t have their uses. It’s always a sensible idea to have capital set aside for a rainy day and for emergency costs. Products like Cash ISAs are also a handy temporary destination for money you’ve earmarked for a big purchase like a car or a holiday.

Putting the lion’s share of your hard-earned savings in one of these accounts can seriously destroy your wealth on a long-term basis, however. Research just released from Sourced Capital underlines the massive impact they can have on your financial health.

Bad returns

The peer-to-peer lending platform looked at the annual rate of inflation since 2012. It then compared this with the annual interest rate on an average savings account and the rate on an average one-year, fixed-rate ISA too.

It first looked at the rate of consumer price inflation (or CPI, the main inflation gauge) over the past eight years to get a guide to the rising cost of living. Sourced Capital then calculated that £1,000 worth of goods on the high street in 2012 would have risen to £1,153 today.

So what about theoretical returns from those aforementioned accounts in that time? If you had parked £1,000 in the average savings account in 2012 this would now be worth just £1,048. And things are hardly better for those who’d put their money in one of those fixed-rate ISAs. A grand stashed away in one of those would have made you a mere £1,126 today.

Clearly those hoping to have made big returns on their saved-up cash would likely have ended up disappointed by the end of the decade. But this is only half of the problem. As Sourced Capital comments: “The interest earned on these savings options would have been wiped out due to the increasing cost of inflation.”

Stick with stocks

Those looking to build a handsome nest egg for retirement would be better off investing in shares. Doing this through a Stocks and Shares ISA also allows individuals to shield their returns from the gaze of the taxman too.

There’s a wealth of information out there showing how stock markets can make savers a fortune. They have even made many Stocks and Shares ISA investors millionaires. Studies show that long-term share owners can make an average return of 8% to 10% per year.

So what would someone who put £1,000 to work in a Stocks and Shares ISA in 2012 now be looking at returns-wise? Well, based on those figures above, an individual would have seen the value of their savings risen to anything between £1,851 and £2,144. This represents a difference of up to £1,000 versus total returns from one of those fixed-rate ISAs.

The coronavirus outbreak has made share markets more volatile of late. But with the right guidance, it’s still possible to snap up some terrific stocks today, shares that could make you a fortune by the time you come to retire.

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

Young woman holding up three fingers
Investing Articles

Want to start investing in 2026? 3 things to get ready now!

Before someone is ready to start investing in the stock market, our writer reckons it could well be worth them…

Read more »

Investing Articles

Can the stock market continue its strong performance into 2026?

Will the stock market power ahead next year -- or could its recent strong run come crashing down? Christopher Ruane…

Read more »

Businessman hand stacking money coins with virtual percentage icons
Investing Articles

Here’s how someone could invest £20k in an ISA to target a 7% dividend yield in 2026

Is 7% a realistic target dividend yield for a Stocks and Shares ISA? Christopher Ruane reckons that it could be.…

Read more »

A quiet morning and an empty Victoria Street in Edinburgh's historic Old Town.
Investing Articles

How little is £1k invested in Greggs shares in January worth now?

Just how much value have Greggs shares lost this year -- and why has our writer been putting his money…

Read more »

Businessman using pen drawing line for increasing arrow from 2024 to 2025
Investing Articles

This cheap FTSE 100 stock outperformed Barclays, IAG, and Games Workshop shares in 2025 but no one’s talking about it

This FTSE stock has delivered fantastic gains in 2025, outperforming a lot of more popular shares. Yet going into 2026,…

Read more »

Close-up of British bank notes
Investing Articles

100 Lloyds shares cost £55 in January. Here’s what they’re worth now!

How well have Lloyds shares done in 2025? Very well is the answer, as our writer explains. But they still…

Read more »

Thoughtful man using his phone while riding on a train and looking through the window
Investing Articles

How much do you need in an ISA to target £2,000 a month of passive income

Our writer explores a passive income strategy that involves the most boring FTSE 100 share. But when it comes to…

Read more »

Investing Articles

£5,000 invested in a FTSE 250 index tracker at the start of 2025 is now worth…

Despite underperforming the FTSE 100, the FTSE 250 has been the place to find some of the UK’s top growth…

Read more »