Here’s how much a £20,000 Stocks and Shares ISA can be worth after 10 years of investing

Not using the Stocks and Shares ISA annual allowance is a critical mistake that could cost investors over £340,000 in wealth over the course of a decade!

| More on:
Smartly dressed middle-aged black gentleman working at his desk

Image source: Getty Images

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, British investors get up to £20,000 they can invest in the stock market entirely tax-free using a Stocks and Shares ISA. It’s one of the most powerful wealth-building tools in the country. And using as much of this annual allowance each year is crucial for those aiming to get seriously richer.

Even when following the basic strategy of investing in index funds, £20,000 left to compound for a decade grows to more than double at an 8% annualised rate. And by maxing out the ISA allowance every year during this decade, this amount surges to just over £300,000!

Yet, this could be just the tip of the iceberg. For successful stock pickers, even without making any extra contributions, a £20,000 Stocks and Shares ISA 10 years ago could now be worth more than £340,000. Here’s how.

A quiet multi-bagger

With most investors distracted by prominent FTSE 100 stocks such as Lloyds or Rolls-Royce, not many investors have Goodwin (LSE:GDWN) on their radars. Yet, despite this lack of popularity, Goodwin shares have been among the best-performing investments of the last decade.

As a quick introduction, Goodwin is a UK-based specialist engineering group manufacturing high-integrity machined castings and mineral-based powders. It’s certainly not an institution most people encounter every day. But for the energy, jewellery, defence, mining, and steel industries, Goodwin sits at the heart of the value chain.

Since 2015, management’s shifted focus away from the cyclical oil & gas sector to capitalise on more consistent opportunities within the defence and nuclear sectors. And through a series of substantial contract wins as well as cornering the jewellery market among emerging countries, the profits have just continued to quietly compound.

The result? A 1,603.6% total return since December 2015. That’s the equivalent of 32.8% a year – 4.1 times more than the UK stock market’s average performance!

Still worth considering?

The result of all this phenomenal success is that Goodwin shares are now trading close to an all-time high. And yet, with a market-cap of just £1.55bn, the group still has plenty of momentum in its growth engine.

After securing lengthy submarine and nuclear contracts, its order book stretches out for years, not months. Goodwin’s recent partnership with Northrop Grumman has opened the door to the US defence supply chain. And with manufacturing efficiency on the rise, profit margins are seemingly set to expand even further.

This growth trajectory’s only being accelerated by the rise in global defence spending, particularly within the UK and Europe.

However, this also serves as a double-edged sword. If political priorities shift, defence spending could suffer, reducing opportunities for expansion. What’s more, it’s important to highlight that the Goodwin family still control the lion’s share of voting power, with the governance often being criticised for the lack of independent directors.

Put simply, if the Goodwin family start making questionable decisions, there’s little recourse available for shareholders.

Obviously, not everyone has the risk tolerance for investing in what essentially amounts to a private fiefdom.

Nevertheless, the Goodwin family have proven to be excellent stewards of their engineering empire. And with such an impressive track record combined with ample growth opportunity, it’s a business I’m currently considering for my own Stocks and Shares ISA.

Zaven Boyrazian has no position in any of the shares mentioned. The Motley Fool UK has recommended Goodwin Plc, Lloyds Banking Group Plc, and Rolls-Royce Plc. 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

Investing Articles

Want to start buying shares next week with £200 or £300? Here’s how!

Ever thought of becoming a stock market investor? Christopher Ruane explains how someone could start buying shares even on a…

Read more »

Rear view image depicting a senior man in his 70s sitting on a bench leading down to the iconic Seven Sisters cliffs on the coastline of East Sussex, UK. The man is wearing casual clothing - blue denim jeans, a red checked shirt, navy blue gilet. The man is having a rest from hiking and his hiking pole is leaning up against the bench.
Investing Articles

2 ideas for a SIPP or ISA in 2026

Looking for stocks for an ISA or SIPP portfolio? Our writer thinks a FTSE 100 defence giant and fallen pharma…

Read more »

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

Could buying this stock at $13 be like investing in Tesla in 2011?

Tesla stock went on to make early investors a literal fortune. Our writer sees some interesting similarities with this eVTOL…

Read more »

Close-up of British bank notes
Investing Articles

3 reasons the Lloyds share price could keep climbing in 2026

Out of 18 analysts, 11 rate Lloyds a Buy, even after the share price has had its best year for…

Read more »

Chalkboard representation of risk versus reward on a pair of scales
Growth Shares

Considering these UK shares could help an investor on the road to a million-pound portfolio

Jon Smith points out several sectors where he believes long-term gains could be found, and filters them down to specific…

Read more »

Close-up image depicting a woman in her 70s taking British bank notes from her colourful leather wallet.
Investing For Beginners

Martin Lewis is embracing stock investing, but I think he missed a key point

It's great that Martin Lewis is talking about stocks, writes Jon Smith, but he feels he's missed a trick by…

Read more »

House models and one with REIT - standing for real estate investment trust - written on it.
Investing Articles

This 8% yield could be a great addition to a portfolio of dividend shares

Penny stocks don't usually make for great passive income investments. But dividend investors should consider shares in this under-the-radar UK…

Read more »

Queen Street, one of Cardiff's main shopping streets, busy with Saturday shoppers.
Investing Articles

Why this 9.71% dividend yield might be a rare passive income opportunity

This REIT offers a 9.71% dividend yield from a portfolio with high occupancy, long leases, and strong rent collection from…

Read more »