We have some exciting news to share! The Motley Fool UK has now become The Twelfth Magpie -- an independent, UK-owned company, led by our long-serving UK management team — Mark Rogers, Chris Nials and Heather Adlington. In practical terms, it’s the same team you know, now fully focused on serving our UK readers and members.

Just as importantly, our approach remains unchanged: long-term, jargon-free, and on your side. This site is our new home, and there will be extra tweaks made across the coming few days as we settle in. So if anything looks a little off, please bear with us!

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.

£10k in an ISA? Here’s how I’d aim to turn it into £100k

With a regular savings plan, a sound investment strategy, and a long-term mindset, it’s possible to build up a huge ISA, says Edward Sheldon.

Smiling young man sitting in cafe and checking messages, with his laptop in front of him.

Image source: Getty Images

You’re reading a free article with opinions that may differ from The Twelfth Magpie’s Premium Investing Services. Become a member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn more, and get a free 'Best Buy Now' stock!.

ISAs (Individual Savings Accounts) are a great wealth-building tool. With these tax-efficient accounts, even a small amount of money can grow into a large sum, over time.

Here, I’m going to explain how I’d aim to turn £10k in an ISA into £100k. These are the moves I’d make to build up a six-figure account.

Should you buy Rolls Royce shares today?

Before you decide, please take a moment to review this report first. Despite ongoing uncertainties from US tariffs to global conflicts, Mark Rogers and his team believe many UK shares still trade at substantial discounts, offering savvy investors plenty of potential opportunities to learn about.

That’s why this could be an ideal time to secure this valuable research – Mark’s analysts have scoured the markets to reveal 5 of his favourite long-term ‘Buys’. Please, don’t make any big decisions before seeing them.

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.

The best way to build wealth

In my view, the best way to build up a large amount of capital within an ISA is to adopt a strategy that incorporates both saving and investing.

To state the obvious, saving is the process of putting some money away for the future. But investing, on the other hand, is the process of putting saved money to work in the hope of generating high long-term returns (above those on offer from savings accounts).

The secret to successful investing

Now, for the investing side of things, I’d put my money in the stock market (I’d need either a Stocks and Shares ISA or a Lifetime ISA to do this).

Over the long run, it has delivered returns of around 7-10% per year. That’s way higher than the returns generated by bonds and savings accounts.

However, to achieve these kinds of returns, one needs to build a decent investment portfolio.

History shows that not every stock is going to do well. So it’s important to diversify one’s capital over a range of different companies. That way, if a few shares underperform, one can still potentially generate solid long-term returns.

Building a top portfolio

The good news is that building a diversified stocks portfolio is very easy. Not only are there products like index funds that provide exposure to lots of different stocks for a low cost but there are also high-quality research services (like The Motley Fool) that can help investors build top-notch portfolios.

So I’d do my research – with the help of some experts – and set about building a diversified stocks portfolio that has exposure to a range of different companies.

I’d aim to invest in world-class businesses such as financial markets powerhouse London Stock Exchange Group, tech giant Alphabet (Google), Johnnie Walker and Tanqueray owner Diageo, and payments firm Mastercard.

All of these companies have amazing track records when it comes to generating wealth for investors over the long run.

Getting to £100k

How long would it take me to turn £10k into £100k using this strategy?

Well, it would depend on how much I saved every month and the level of return I was able to generate from my investments.

However, I calculate that if I saved £500 a month into a Stocks and Shares ISA and generated a return of 9% a year on my money over the long term, I could turn £10k into £100k in less than nine years.

Ed Sheldon has positions in Alphabet, Diageo Plc, London Stock Exchange Group Plc, and Mastercard. The Motley Fool UK has recommended Alphabet, Mastercard, and Diageo Plc. Suzanne Frey, an executive at Alphabet, is a member of The Motley Fool’s board of directors. 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

Curtains, happy woman and thinking of future in home, planning and reflection of mindset with view. Window, smile and African girl with vision, ideas and dream for morning inspiration in living room.
Investing Articles

Up 50% in a year! That’s not the only reason I’d consider buying Barclays over Nvidia stock today

Harvey Jones says that Nvidia stock is probably one of the safer ways to play the artificial intelligence revolution. But…

Read more »

Happy senior couple hugging and enjoying retirement at home
Investing Articles

Here’s why I bought this 7.6%-yielding FTSE 100 dividend stock instead of saving in a Cash ISA

Harvey Jones crunches the numbers to show how investing in stocks and shares can be much more profitable than saving…

Read more »

Young Asian woman holding a cup of takeaway coffee and folders containing paperwork, on her way into the office
Investing Articles

Here’s how much passive income 1,000 Greggs shares could pay…

Greggs shares have lost nearly 50% of their value inside the past two years. Is this out-of-favour passive income stock…

Read more »

Overjoyed exited middle aged married couple giving high five, finishing doing domestic paperwork together at home. Euphoric happy older mature spouses celebrating successful investment or purchase.
Investing Articles

This beaten-down FTSE 100 dividend share just jumped 11% in a week but still yields almost 5%

Harvey Jones has been highlighting this dividend share opportunity for weeks and suddenly it's showing signs of life. Can the…

Read more »

Investing Articles

Down 53% since May, is this SpaceX-backed UK stock now in the bargain bin?

The Filtronic (LSE:FTC) share price has come crashing back down to earth in recent weeks. Has the selling gone too…

Read more »

Close-up as a woman counts out modern British banknotes.
Investing Articles

3,566 shares in this FTSE 100 stalwart earns a £1,443 second income

Stephen Wright sees Unilever's battered share price as an attractive option for investors looking for a second income to consider.

Read more »

Bus waiting in front of the London Stock Exchange on a sunny day.
Investing Articles

3 stocks I’m looking to buy in July

Stephen Wright’s stocks to buy list for July includes a specialist chemicals recovery play, a quiet infrastructure compounder, and an…

Read more »

ISA Individual Savings Account
Investing Articles

How do the government’s latest changes affect your Stocks and Shares ISA?

Stephen Wright explains what the new anti-circumvention rules mean for investors with uninvested cash in their Stocks and Shares ISAs.

Read more »