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

ISA inflows are booming! But are savers making a fatal mistake?

Cash ISA savings have surged since the start of the year. But could investing in a Stocks & Shares ISA be a better option to consider?

| More on:

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.

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

Image source: Getty Images

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.

We’re huge fans of the Individual Savings Account (ISA) here at The Motley Fool.

With generous annual allowances — £20,000 for both the Cash ISA and the Stocks and Shares ISA — and protection from capital gains and dividend tax, they provide an excellent way for Brits to build long-term wealth.

So recent data showing that savers are turning their backs on standard savings accounts for ISAs is encouraging.

But on the other hand, could people be missing a trick by prioritising Cash ISAs over their share-based equivalents?

Please note that tax treatment depends on the individual circumstances of each client and may be subject to change in future. The content in this article is provided for information purposes only. It is not intended to be, neither does it constitute, any form of tax advice. Readers are responsible for carrying out their own due diligence and for obtaining professional advice before making any investment decisions.

The ISA boom

Studying data from savings specialist CACI, Paragon Bank calculates that adult ISA cash balances totalled £359.2bn as of September. This reflects growth of 11.7%, or £37.7bn, since the end of January.

By comparison, balances on non-ISA savings accounts have risen by a modest £0.4%, or £3bn.

Paragon says that “savers have increasingly focused on ISAs as savings rates have moved higher, leaving more exposed to potential tax bills“.

These tax liabilities are quite shocking too. Using figures from HM Revenue and Customs, it notes that “£10.4bn is expected to be generated from savings interest in the 2024/25 tax year, ten times the £1.4bn raised in the 2021/22 tax year.”

Big mistake?

While the rise in ISA activity is a good thing for investors, I still worry that savers are making a big mistake, one that could cost them a comfortable (or even luxurious) retirement.

Although Cash ISAs can save individuals a fortune in tax, the returns they offer are poor compared with those that a Stocks and Shares ISA can provide. And with interest rates coming down, the savings rate on Cash ISAs is following suit.

Making better returns

I own both a Cash ISA and Stocks and Shares ISA. But the amount of my money invested in the latter is far higher. Let me show you why.

If someone invested £250 a month in a 5%-yielding Cash ISA, after 30 years they’d have a retirement pot of £208,065. By comparison, if they’d put that in a Stocks and Shares ISA providing an average annual return of 9%, they’d have a balance of £457,686.

Past performance is no guarantee of future returns. But history shows that an equal mix of FTSE 100 and FTSE 250 shares could allow me to hit that 9% target.

Targeting trusts

Buying shares rather than holding cash on account involves greater risk. But purchasing a trust like the F&C Investment Trust (LSE:FCIT) can significantly reduce the danger.

Dating back more than 150 years, this particular trust clearly has a strong record of delivery. In fact, with an average annual return above 11.4% since 2014, it’s provided a better return than both FTSE 100 and FTSE 250 shares.

In total, the F&C Investment Trust has holdings in around 400 countries across the globe. And so it offers investors excellent diversification across different industries and regions.

The trust has a larger weighting of tech stocks like Nvidia and Apple than some others. This could impact total performance during tough times when consumers and businesses trim spending. However, it also provides exposure to rising growth sectors like artificial intelligence (AI) and quantum computing.

On balance, I think it’s a great investment to consider for a Stocks and Shares ISA. It’s just one of many top trusts to choose from today.

Royston Wild has no position in any of the shares mentioned. The Motley Fool UK has recommended Apple and Nvidia. 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

Warren Buffett at a Berkshire Hathaway AGM
Investing Articles

3 Warren Buffett investing ideas I plan to use in 2026

After decades in the top job at Berkshire Hathaway, Warren Buffett is preparing to step aside. But this writer will…

Read more »

Close-up of a woman holding modern polymer ten, twenty and fifty pound notes.
Investing Articles

Looking to earn a second income next year (and every year)? Here’s one approach.

Christopher Ruane explains how some prudent investment decisions now could potentially help set someone up with a second income in…

Read more »

Senior woman potting plant in garden at home
Investing Articles

Could a 10%+ yielding dividend share like this make sense for a retirement portfolio?

With a double-digit percentage yield, could this FTSE 250 share be worth considering for a retirement portfolio? Our writer weighs…

Read more »

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

Forget Rigetti and IonQ: here’s a quantum computing growth stock that actually looks cheap

Edward Sheldon has found a growth stock in the quantum computing space with lots of potential and a really attractive…

Read more »

UK money in a Jar on a background
Investing Articles

Here’s a £3 a day passive income plan for 2026!

Looking for a simple and cheap plan to try and earn passive income in 2026 and beyond? Christopher Ruane shares…

Read more »

Blue NIO sports car in Oslo showroom
Investing Articles

NIO stock’s down 35% since October. Time to buy?

NIO stock has had a roller coaster year so far! Christopher Ruane looks at some of the highs and lows…

Read more »

Investing Articles

By December 2026, £1,000 invested in BAE Systems shares could be worth…

Where will BAE Systems shares be in a year's time? Here is our Foolish author's review of the latest analyst…

Read more »

Mature people enjoying time together during road trip
Investing Articles

Keen for early retirement with a second income from dividends? Here’s how much you might need to invest

Ditching the office job early is a dream of many, but without a second income, is it possible? Here’s how…

Read more »