How I’d invest a £20,000 Stocks and Shares ISA to try and build long-term wealth

Christopher Ruane reckons he could aim for big rewards by investing a £20,000 Stocks and Shares ISA in the right way. Here he shares his thinking.

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.

Businessman use electronic pen writing rising colorful graph from 2023 to 2024 year of business planning and stock investment growth concept.

Image source: Getty Images

Different people have their own investment objectives when it comes to their Stocks and Shares ISA. As a long-term investor, I think an ISA can be a good vehicle to try and build wealth over the course of years or decades.

If I had £20,000 to put into a Stocks and Shares ISA at the moment, with that goal, here is how I would go about it.

Setting objectives: growth, income, or both

My first move would be to get clear on what I really wanted my ISA to do for me. Simply imagining buying good shares is not an objective in itself.

Rather, I would decide what my focus was. Do I want to zoom in on shares I think could benefit from strong growth of the business in years to come? Should I instead concern myself less with growth and go for some big dividend payers? Or might a balance of growth and income shares make sense for me?

Right now, there are certainly some strong dividend payers even among the ranks of blue-chip FTSE 100 shares. Vodafone announced its latest dividend this week, for example, maintaining its 10.8% yield.

But while I would be happy to have some juicy dividend payers in my Stocks and Shares ISA, I am also keen to tap into some growth opportunities. So as with my current ISA, I would invest in both growth and income shares.

Compounding dividends

If I make the right choices, hopefully the growth shares can increase in value over time.

If my investment thesis about any of them changes at some point, I may sell them and use the proceeds to buy others. At all times, I would maintain a diversified Stocks and Shares ISA.

But what about the income I earn from dividend shares? It could be tempting to take this out of the ISA as I go and use it as a form of passive income.

But with the objective of building wealth, I think it makes more sense to keep the dividends inside the ISA and use them to buy more shares.

That is known as compounding and could be a powerful way to build wealth.

Take that 10.8% dividend yield for example. If I compound £1,000 at 10.8% for a decade, it would be worth almost £2,800. Over two decades that sum would jump to over £7,700 and after three decades, over £21,000!

Compounding can illustrate the value of a long-term approach to investing.

Building wealth from an ISA

What if I compounded the whole £20,000 at 10.8% for three decades? After 30 years, my ISA would be worth over half a million pounds. That would be despite me only having invested £20,000 in it, as well as reinvesting dividends.

A compound annual growth rate of 10.8% is not easy to achieve over a 30-year period, admittedly. But if I can focus on finding the right mixture of high-quality shares at good prices, my Stocks and Shares ISA could put me over halfway towards being a millionaire!

C Ruane has positions in Vodafone Group Public. The Motley Fool UK has recommended Vodafone Group Public. 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

Mature black woman at home texting on her cell phone while sitting on the couch
Investing Articles

Could this cheap FTSE 100 stock be the next Rolls-Royce?

Paul Summers casts his eye over a battered-but-high-quality FTSE 100 stock. Is this the next top-tier company to stage a…

Read more »

ISA Individual Savings Account
Investing Articles

Hesitant over a Stocks and Shares ISA? Here’s a way to deal with scary markets

Volatile stock markets are scaring potential investors away from getting started with their first Stocks and Shares ISA in 2026.

Read more »

This way, That way, The other way - pointing in different directions
Market Movers

Standard Life’s announced a £2bn deal but its share price is largely unchanged. Why?

James Beard considers why the Standard Life share price didn’t take off today (15 April) after the group announced it…

Read more »

Happy parents playing with little kids riding in box
Investing Articles

Up 12% in a month, Hollywood Bowl is a UK dividend stock on a roll

This 5%-yielding dividend stock was one of the top performers in the FTSE 250 index today. What sent it flying…

Read more »

Close-up of children holding a planet at the beach
Investing Articles

Young investors are taking the stock market on a rollercoaster ride. Here’s how retirees can buckle up

Mark Hartley reveals the volatile impact that younger investors are having on the stock market and how UK retirees can…

Read more »

Two female adult friends walking through the city streets at Christmas. They are talking and smiling as they do some Christmas shopping.
Investing Articles

£7,500 invested in Aviva shares 5 years ago is now worth…

A lump sum pumped into Aviva shares half a decade ago has grown a lot. Andrew Mackie looks at the…

Read more »

Young female hand showing five fingers.
Investing Articles

Could £20,000 invested in these 5 dividend shares produce £14,760 of passive income over the next 10 years?

James Beard considers the potential of dividend shares to deliver amazing levels of passive income. Here are five that have…

Read more »

Workers at Whiting refinery, US
Investing Articles

At 570p, is it too late to consider buying BP shares?

Since the end of February, when the conflict in the Middle East started, BP shares have soared nearly 20%. But…

Read more »