How to target big long-term wealth in a Stocks and Shares ISA

There are plenty of common mistakes investors make when building wealth in a Stocks and Shares ISA. Here’s how to avoid them.

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.

A senior group of friends enjoying rowing on the River Derwent

Image source: Getty Images

British investors are exceptionally fortunate to have access to a Stocks and Shares ISA. This special type of investment account protects all profits generated from capital gains and dividends from the grubby fingers of HMRC.

And when a portfolio is left to compound without taxes taking a chunk of capital each year, it can have a profound impact on wealth.

Of course, having access to an investment ISA and using it correctly are two very different things. The stock market is far from risk-free. And tax-free gains are ultimately irrelevant if a portfolio moves in the wrong direction.

With that in mind, let’s explore how to execute a long-term investment strategy to try to build substantial wealth.

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.

Focus on the business, not the stock

In the short term, the movement of shares is driven by mood and momentum. When the market is optimistic, valuations rise. When things take a turn for the worse, prices tumble and may even crash in more extreme cases.

But in the long run, this volatility may be irrelevant since the performance of a stock is ultimately determined by the underlying business.

Don’t forget each share represents a piece of equity in a company. That makes shareholders owners in the underlying firm and therefore have a claim on any profits generated.

So when stock prices begin to drop, a common mistake is to sell as quickly as possible to minimise losses. Instead, investors should be investigating why valuations are falling.

Suppose a fundamental problem has emerged that breaks an investment thesis. In that case, selling, even at a loss, maybe the wiser move. But if the volatility is being created by a short-term hurdle, then this may actually be a buying opportunity.

This concept also works in reverse. If a firm’s valuation is skyrocketing, investors typically start buying more in fear of missing out. But if the strong upward trajectory is being fuelled by unrealistic expectations of future performance, then it could be wise to cash out.

Risk vs reward

Executed poorly, an investment strategy can spectacularly backfire. And investors may be left with far less wealth than when they started.

But taking a patient and disciplined approach can propel a Stocks and Shares ISA to impressive heights. And by employing simple tactics like diversification and pound-cost averaging, it’s possible to keep risk in check at the same time.

Let’s say an investor only manages to match the FTSE 100’s average 8% gains in the long run. That’s still enough to reach millionaire territory within three decades when investing £500 each month in an ISA, not having to worry about taxes.

Meanwhile, this timeline can be significantly shorter for the investors who manage to achieve market-beating returns, even if it’s just by an extra 1%.

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

Artillery rocket system aimed to the sky and soldiers at sunset.
Investing Articles

£7,500 invested in BAE Systems shares 10 days ago is now worth…

Why have BAE Systems shares experienced a sudden double-digit pullback? And does this present a buying opportunity for my portfolio?

Read more »

Picture of an easyJet plane taking off.
Investing Articles

£10,000 invested in easyJet shares 4 weeks ago is now worth…

It's been a crazy month for easyJet shares. Here's what would have happened to an investor's £10,000 stake put to…

Read more »

CEO Mark Zuckerberg at F8 2019 event
Investing Articles

Down 31%, is this a rare chance to buy Meta stock for my ISA cheaply?

After rising to near $800 in 2025, Meta stock has pulled back to around $550. Edward Sheldon looks at whether…

Read more »

Santa Clara offices of NVIDIA
Investing Articles

18% off its peak, is Nvidia stock now attractively priced?

Nvidia stock has given up almost a fifth of the price it commanded at its peak over the past year.…

Read more »

Aston Martin DBX - rear pic of trunk
Investing Articles

The Aston Martin share price destruction helps illustrate 5 common investing mistakes!

The Aston Martin share price has been a disaster for investors. Christopher Ruane highlights a handful of lessons we can…

Read more »

DIVIDEND YIELD text written on a notebook with chart
Dividend Shares

How this stock market correction can help boost a second income by 25%

Jon Smith explains how rising dividend yields across some existing income shares can be seen as an opportunity to grow…

Read more »

Middle-aged Caucasian woman deep in thought while looking out of the window
Investing Articles

Considering a SIPP? Today’s market could provide an excellent opportunity to start

Mark Hartley breaks down the benefits of using a SIPP for retirement, and how current market conditions could offer a…

Read more »

Calendar showing the date of 5th April on desk in a house
Investing Articles

Looking for last-minute ISA ideas? Check out these UK stocks before April 3

Easter bank holidays mean the deadline to put cash into a Stocks and Shares ISA might be closer than UK…

Read more »