You won’t make a million with a Cash ISA! But £300 a month in a Stocks & Shares ISA may do it

I want to make a million from my hard-earned cash. Here I explain why I’m largely avoiding Cash ISAs and putting my money to work elsewhere.

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.

Want to get rich? Perhaps even make a million and retire early? It’s a dream that most of us have, and yet one that very few of us give ourselves a chance of realistically achieving. If you’re one of those people who simply lock their monthly savings up in something like a Cash ISA, I have bad news for you — you’ll likely be working right up until your mid-60s. Maybe even longer.

Forget about joining the millionaires club. Interest rates are so low on cash accounts that the prospect of making any sort of decent return is dead in the water. Ultra-low Bank of England base rates means that the yield on Cash ISAs is quite pathetic. And rates are in danger of falling further given the high chance of more rate cuts during the 2020s to support the UK economy.

Don’t despair, though. It’s pretty straightforward for the average Joe to make changes to their savings strategy with a view to getting rich and possibly even making that million. It means casting aside that Cash ISA and investing the bulk of your money in great UK shares via a Stocks and Shares ISA instead.

Couple relaxing on a beach in front of a sunset

Bad returns

Let me crunch some numbers to show you what you could be missing out on by sticking with a Cash ISA. Consider someone aged 30 who saves £300 a month, every month, up until the age of 65. Based on the best-paying rate of 0.9% today, that person would have made £148k.

It’s not too bad a figure at face value. But dig a little deeper and the pitfalls of the Cash ISA become apparent. For the £126,000 that the saver squirreled away over three-and-a-half decades they’d have made a paltry profit of just £21,939. In my book that seems to be a small return for half a lifetime of financial sacrifices and hard work. 

Make a million with UK shares

This is where the beauty of investing in UK shares comes in. Studies show us that the average long-term investor can expect to make a return of between 8% and 10% per year. Based on these figures, that person who invested £300 each month from the age of 30 to 65 would make a total return of between £643,000 and £1.02m. Yes, they really could have realised their goal to make a million.

Investing in a Stocks and Shares ISA improves your chances of becoming a millionaire with UK shares. These particular products save you having to pay anything to the taxman. And with a maximum annual investment allowance of £20k, these ISAs meet the needs of the vast majority of people.

We here at The Motley Fool believe that share investing is the best way to make your money work for you. The recent stock market crash provides a way to turbocharge the returns on your hard-earned savings too, by allowing you to buy UK shares at low prices and then watching them rise in value as the economic recovery takes hold. And there’s a wealth of top quality stocks out there to help you make a fortune.

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

UK coloured flags waving above large crowd on a stadium sport match.
Investing Articles

Investors tempted by beaten-down Diageo shares should mark 6 May on their calendars now

Diageo is a top British blue-chip but its shares have come under fire in recent years. Harvey Jones hopes investors…

Read more »

Close up of manual worker's equipment at construction site without people.
Investing Articles

Are Taylor Wimpey shares just too cheap to ignore?

Times have been tough for holders of Taylor Wimpey shares. But Paul Summers wonders whether a lot of bad news…

Read more »

This way, That way, The other way - pointing in different directions
Investing Articles

Here’s how to target a £50 monthly passive income in a Stocks and Shares ISA

How easy or hard is it to start building a £50 monthly passive income in a Stocks and Shares ISA?…

Read more »

Edinburgh Cityscape with fireworks over The Castle and Balmoral Clock Tower
Investing Articles

£7,500 invested in Scottish Mortgage shares 3 years ago is now worth…

Scottish Mortgage shares have the wind in their sails and have delivered excellent returns since 2023. Is this FTSE 100…

Read more »

Belfast City Sunset with colorful twilight over Lagan Weir Pedestrian and Cycle Bridge spanning over the Lagan River in downtown Belfast
Investing Articles

Up 1,164%! Here’s how the Rolls-Royce share price might keep surging

The Rolls-Royce share price has been flying of late. But here's one reason why the next few years could see…

Read more »

Midnight is celebrated along the River Thames in London with a spectacular and colourful firework display.
Investing Articles

Down 90% and 93%! Are Ocado Group and Aston Martin shares set for a mind-blowing recovery?

Aston Martin shares have been a complete disaster and Ocado has done just as badly. But are these FTSE 250…

Read more »

Amazon Go's first store
Investing Articles

How this £6.24 UK stock is copying Amazon’s winning tactics

Amazon’s success has been built on using its scale to earn high-margin subscription revenues. And a FTSE 250 stock is…

Read more »

Black woman using smartphone at home, watching stock charts.
Growth Shares

Should I sell FTSE 100 stocks ahead of May and go away?

Jon Smith reviews an old market adage but questions whether this still applies against the backdrop in 2026 and the…

Read more »