How I’d invest £20k in a Stocks and Shares ISA to try and double my money

Our writer considers how best to invest a Stocks and Shares ISA to try to double his money over the coming years.

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.

Happy young plus size woman sitting at kitchen table and watching tv series on tablet computer

Image source: Getty Images

When investing, your capital is at risk. The value of your investments can go down as well as up and you may get back less than you put in.

Read More

The content of this article is provided for information purposes only and is not intended to be, nor does it constitute, any form of personal advice. Investments in a currency other than sterling are exposed to currency exchange risk. Currency exchange rates are constantly changing, which may affect the value of the investment in sterling terms. You could lose money in sterling even if the stock price rises in the currency of origin. Stocks listed on overseas exchanges may be subject to additional dealing and exchange rate charges, and may have other tax implications, and may not provide the same, or any, regulatory protection as in the UK.

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.

Every year I try to maximise my Stocks and Shares ISA. That’s because I want to make my money work harder so I don’t have to.

Investing in shares can be lucrative, but there are risks too. Ideally, I’d like to maximise my returns and minimise my risk. Here’s how I’d get started.

Doubling a Stocks and Shares ISA

First, the simplest option could be for me to buy a FTSE 100 tracker fund. This would track the performance of the UK’s leading stock index.

The long-term performance for this large-cap index looks promising. On average, it has gained by 8% a year.

Note that if I achieve the same performance over the coming decade (and that’s not guaranteed), I’d double my money in nine years.

That’s not too bad, but what if I want to double my money in five years instead? To do that, I’d need to earn 15% a year. But just how likely is that?

It’s interesting to see that 25% of FTSE 100 shares achieved this return over the past decade, so it’s certainly not impossible.

Winning shares

For the best chance of finding these winners, I’d look for certain characteristics. First, I think smaller companies stand a better chance of achieving double-digit share price returns. That’s because they can often grow faster than larger and more mature businesses.

Many of the biggest winners from the FTSE 100 may have spent time as mid-cap companies in the FTSE 250 index, so I’d look there too.

I’d look for businesses that are experiencing earnings growth. I want to see companies that are steadily growing both sales and profits over several years.

But I also want them to make efficient use of their capital. That’s why I’d prefer companies that demonstrate double-digit return on capital employed (ROCE). This is a good measure of business quality, in my opinion.

Right now, a few shares stand out to me. These include Softcat, Games Workshop, Dunelm, Safestore Holdings and Greggs. I’d happily buy all of these shares for my Stocks and Shares ISA.

Growth with technology shares

To target 15%, I’d also look abroad to capture the largest technology companies. The past decade has been particularly kind to tech shares. In fact, the Nasdaq 100 achieved an annual return of 17%.

A word of warning, however. This tech-filled index might not perform as well over the coming decade. The US federal reserve has embarked on a journey of higher interest rates to tackle surging inflation. That’s typically not the best environment for high-growth shares.

That said, it includes many fast-growing and innovative companies like Tesla and Nvidia. It also includes the world’s technology behemoths that are superb, high-quality businesses. These include Microsoft, Apple, Amazon and Alphabet.

Overall, were I investing £20,000 in my Stocks and Shares ISA today, I’d split it into four parts. I’d invest £3,000 in a FTSE 100 index tracker, £3,000 in a FTSE 250 index tracker, £10,000 into my selected top picks, and the remaining £4,000 in a Nasdaq 100 index tracker. That may make a 15% target harder to achieve, but it should spread my risk sufficiently and avoid me putting all my eggs in one basket.

Should you invest, the value of your investment may rise or fall and your capital is at risk. Before investing, your individual circumstances should be assessed. Consider taking independent financial advice.

John Mackey, CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool’s board of directors. Suzanne Frey, an executive at Alphabet, is a member of The Motley Fool’s board of directors. Harshil Patel has positions in Amazon, Apple, Microsoft, and Tesla. The Motley Fool UK has recommended Alphabet (A shares), Alphabet (C shares), Amazon, Apple, Games Workshop, Microsoft, Safestore Holdings, Softcat, and Tesla. 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 Black man sat in front of laptop while wearing headphones
Investing Articles

Down 53% in a year! I reckon this oversold FTSE 100 stock is now ripe for a comeback

This FTSE 100 stock has fallen out of fashion with investors, but Harvey Jones reckons the sell-off has gone too…

Read more »

Young Asian man drinking coffee at home and looking at his phone
Investing Articles

How much second income would I get if I put £10k into dirt cheap Centrica shares?

Centric shares have been looking incredibly cheap despite rocketing in recent years. Harvey Jones wonders whether this is an opportunity…

Read more »

artificial intelligence investing algorithms
Investing Articles

If I’d invested £10k in AstraZeneca shares three months ago here’s what I’d have now

Harvey Jones is kicking himself for failing to buy AstraZeneca shares before the took off. Is there still a decent…

Read more »

A senior group of friends enjoying rowing on the River Derwent
Investing Articles

How I’d find shares to buy for an early retirement

Christopher Ruane explains some of the factors he considers when looking for shares to buy that could potentially help him…

Read more »

Investing Articles

Why I’d snap up bargain UK shares to try and build wealth

Christopher Ruane explains how he hopes to find high-quality UK shares selling at attractive prices, to help him build wealth…

Read more »

Young Caucasian woman at the street withdrawing money at the ATM
Investing Articles

Here’s how I’d target a £2k annual second income from a £20k Stocks & Shares ISA

Our writer explains how he’d try to earn thousands of pounds annually in dividends by investing a £20k ISA in…

Read more »

Mother and Daughter Blowing Bubbles
Investing Articles

5 stocks that Fools have been buying!

Our Foolish freelancers are putting their money where their mouths are and buying these stocks in recent weeks.

Read more »

Investing Articles

The £20k Stocks and Shares ISA might be one of the better things about living in the UK

The £20k Stocks and Shares ISA doesn't have many equivalents in other countries. Here's why these accounts can help UK…

Read more »