We have some exciting news to share! The Motley Fool UK has now become The Twelfth Magpie -- an independent, UK-owned company, led by our long-serving UK management team — Mark Rogers, Chris Nials and Heather Adlington. In practical terms, it’s the same team you know, now fully focused on serving our UK readers and members.

Just as importantly, our approach remains unchanged: long-term, jargon-free, and on your side. This site is our new home, and there will be extra tweaks made across the coming few days as we settle in. So if anything looks a little off, please bear with us!

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.

If a 40-year-old puts £500 a month into a Stocks & Shares ISA, here’s what they could have to retire on

The tax-efficient Stocks and Shares ISA can be a powerful weapon in helping Britons to build long-term wealth, as I’ll now demonstrate.

| More on:
A senior man and his wife holding hands walking up a hill on a footpath looking away from the camera at the view. The fishing village of Polperro is behind them.

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.

The Stocks and Shares ISA has, since its introduction in 1999, provided a vital tool in helping Brits to create wealth for retirement. Their importance could rise still further if — as expected — major changes are announced to the Cash ISA next month.

Rumour has it the Treasury will cut annual allowances on these cash products to boost inflows into their share-based equivalents. I’m not totally opposed to this idea, as history shows that investing in equities typically delivers far better returns.

XXX

With this in mind, here’s how much money a 40-year-old could have by retirement if they invested £500 in a Stocks and Shares ISA.

A 9.64% return

Unlike with a Cash ISA, users of these products don’t enjoy the luxury of a guaranteed return. In fact, returns can fluctuate wildly according to stock market conditions. In theory, their value can also decline all the way to zero.

Yet over the long term, Stocks and Shares ISAs continue to provide greater gains that cash-based products. Past performance doesn’t always provide a reliable guide to the future. But it is certainly worth paying serious attention to.

According to Moneyfarm, the average annual return on a Stocks and Shares ISA over the last decade is 9.64%. That’s significantly higher than the 1.21% that Cash ISAs have provided.

If this continues, someone who invested £500 a month between 40 and the retirement age of 68 would have a healthy retirement fund of £853,217.

Conversely, that amount put into a low-yielding Cash ISA would have turned into just £199,846.

It’s possible that cash savers will get an improved return over the next 10 years, as the era of ultra-low interest (and therefore savings) rates appears over. Yet it’s still likely, in my opinion, that Stocks and Shares ISAs will provide far better gains.

Taking the right path

With all capital gains and dividend income tax free, a Stocks and Shares ISA can be a far more effective way to build wealth than a general investment account (GIA). Yet investing without a sound strategy can result in an annual return far below than 9.64% average.

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.

A key tool to target high annual returns is to build a diversified portfolio of assets. Owning a range of shares allows risk to be effectively spread, and for individuals to capture a variety of growth and income opportunities.

Investors can also buy investment trusts or exchange-traded funds (ETFs) to achieve this diversification effect. The Polar Capital Technology Trust (LSE:PCT) is one such security I think is worth a close look.

On one hand, its narrow focus on tech shares can leave it vulnerable during economic downturns. But over the long term, it has the potential to surge in value thanks to fast-growing segments like artificial intelligence (AI), quantum computing, robotics, and cloud infrastructure.

With holdings in more than 100 companies (including sector giants Nvidia, Microsoft, and Apple), it provides a multitude of ways for investors to profit from the ongoing digital revolution. Since 2015, it’s delivered an average annual return of roughly 20.6%.

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

Friends and sisters exploring the outdoors together in Cornwall. They are standing with their arms around each other at the coast.
Investing Articles

£503 buys 14 shares in this FTSE 250 stock that returned 23.9% annually for the last 15 years

This FTSE 250 stock has averaged a huge return for 15 years. At today's price, £503 buys 14 shares. But…

Read more »

Black woman using loudspeaker to be heard
Investing Articles

£1,000 buys 25 shares in this FTSE 100 stock that’s returned 29.2% annually for the last 10 years

This FTSE 100 mining stock has returned close to 30% a year for a decade. At 3,995p, £1,000 buys 25…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

Down 47%, is this growth stock finally worth buying in May?

With a £288m order book and a hidden pipeline of defence and nuclear contracts, is this growth stock now too…

Read more »

House models and one with REIT - standing for real estate investment trust - written on it.
Investing Articles

2 REITs yielding 7%+ to consider for passive income in 2026

A REIT backed by the NHS and another backed by Tesco and Sainsbury's with both yielding 7%+. Here's why I'm…

Read more »

Woman riding her old fashioned bicycle along the Beach Esplanade at Aberdeen, Scotland.
Investing Articles

Just 97 shares of this UK dividend stock generate £238 in passive income

A 5.7% yield, £238 in passive income from just 97 shares, and one of the most divisive dividend stocks on…

Read more »

ISA coins
Investing Articles

£10,000 in an ISA generates a second income of…

The London Stock Exchange is home to some of the world's most generous dividends. But how big a second income…

Read more »

Shot of a senior man drinking coffee and looking thoughtfully out of a window
Investing Articles

Expert recommendations: 2 top income stocks yielding 7%+!

With yields of 7.2% and 7.8% respectively, these two income stocks are catching the eyes of institutional analysts. Should investors…

Read more »

Illustration of flames over a black background
Investing Articles

3 top income-focused stocks to buy in May 2026, according to experts

Looking for a stock to buy for income in May 2026? Experts have flagged these three UK dividend shares as…

Read more »