Forget a Cash ISA! I’d buy the best UK shares to make a million from the stock market crash

Cash ISA rates are quite frankly atrocious. Here’s why I think you’re far more likely to build serious wealth by investing in the best UK shares.

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.

When the FTSE 100 tumbled 32% in the depths of the sell-off, many investors got cold feet. The mass exodus away from the stock market and into alternative assets and savings accounts was prompted by plunging share prices and economic uncertainty. But while accounts such as a Cash ISA offer certainty and safety, they certainly won’t enable you to effectively grow your wealth. Instead, I’d invest in the best UK shares on the market to build a tidy retirement pot.

Abysmal Cash ISA rates

Don’t get me wrong. A Cash ISA can come in extremely handy when saving for short-term goals such as a house deposit. But for anything above and beyond that, they are practically useless.

The atrocious interest rates on most of these savings accounts means that, in real terms, your hard-earned money is actually losing its purchasing power. Over time, this can have a seriously damaging effect on your savings. Moreover, expect a far smaller retirement pot than if you directed your cash elsewhere.

What’s more, the UK bank rate looks set to remain at rock-bottom in order to bolster economic recovery. So, it doesn’t look like the rates on the majority of Cash ISAs will be improving any time soon. With that in mind, I urge those saving for the long term to consider investing in a Stocks and Shares ISA. But why?

Buying the best UK shares in a S&S ISA

Historically, the stock market has delivered a far superior return than a Cash ISA over lengthy periods. For example, over the last 30 years, the FTSE 100 Index has averaged an 8% annualised return.

While investing in shares is almost guaranteed to be more volatile, those who stomached the additional risk in the past have always been rewarded handsomely in the long run. For example, let’s say you invest £500 a month for exactly 30 years. Assuming an annual return of 8%, your investment pot will have grown in value to £708,821.

To make a million, however, you’re going to have to beat the average return of the FTSE 100, which is easier said than done. To illustrate though, after 34 years of investing £350 a month, with an annual return of 10%, your investment would be worth £1,086,038.

Although remember, you should only invest in shares if you’re willing to hold for the long term. That’s at least five years, but ideally even longer. The larger your investment horizon, the more time you have to ride out temporary market downswings. Additionally, a longer time frame aids the process of compounding, which has a huge impact on returns, as illustrated above.

As such, buying some of the UK’s best shares and holding them in an investment ISA is a far superior way to build long-term wealth, in my view. Money in a Cash ISA seems wasted when it could work much harder for you in the stock market.

Matthew Dumigan 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

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 »

Two white male workmen working on site at an oil rig
Dividend Shares

More oil wobbles as the BP share price dives 7% in a day!

The BP share price has been wildly volatile in 2026, bouncing around with each new move in the US-Iran war.…

Read more »

British bank notes and coins
Investing Articles

Meet the 9.6%-yielding income share that could keep growing its payout!

This income share yields close to 10% -- and has grown its dividend per share year after year for well…

Read more »

Fireworks display in the shape of willow at Newcastle, Co. Down , Northern Ireland at Halloween.
Investing Articles

When will Barclays shares hit £10?

Barclays shares were close to £1 not so long ago, but could they do the unthinkable and make it to…

Read more »

Picture of an easyJet plane taking off.
Investing Articles

easyJet shares have bounced back before. On a P/E ratio of 6, could they do it again?

Our writer thinks easyJet shares could turn out to be a terrific bargain from a long-term perspective. So is he…

Read more »

Stack of British pound coins falling on list of share prices
Investing Articles

Could National Grid shares offer me a dividend that won’t be hurt by inflation?

National Grid aims to inflation-proof its dividend per share with a policy of annual rises that match inflation. Is our…

Read more »