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.

Building a £100k ISA from scratch

Edward Sheldon shows how it’s possible to build up a six-figure ISA in less than 10 years by saving regularly and investing in the stock market.

Young black woman walking in Central London for shopping

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!.

Building up £100k in an ISA is a common goal. With that kind of money, one has a lot of options financially.

The good news is that with a long-term perspective, a regular savings plan, and a sound investment strategy, it’s definitely achievable. With that in mind, here’s how I’d aim to build a six-figure ISA from scratch today.

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.

Opening the right type of ISA

If I was just starting my wealth-building journey today, and my goal was to build up £100k, I’d start by opening a Stocks and Shares ISA, and maybe also a Lifetime ISA if I was under 40.

The advantage of these ISAs is that they offer access to a wide range of investments including stocks, funds, exchange-traded funds (ETFs), and investment trusts. This means they could help me grow my money much faster than a Cash ISA could.

Meanwhile, contributions into a Lifetime ISA come with a 25% bonus from the government, which again, could help me grow my wealth faster.

Making regular contributions

Once my ISA was open, I’d start a regular savings plan.

Here, I’d work out how much I could afford to contribute to my account every month. And then I’d pay in this amount as soon as I was paid.

This approach would help me save consistently. Even if I was only able to save a little bit of money every month, it would add up over time.

Investing in the stock market

Finally, I would put my money to work by investing it in the stock market. Over the long term, the stock market tends to outperform other assets such as bonds and cash savings.

Now, there are many different approaches to investing I could pursue.

I could invest in index funds such as Vanguard’s FTSE Global All Cap Index. This is a diversified product that provides exposure to over 7,000 stocks globally for a low fee.

Or, I could invest in actively-managed funds such as Fundsmith Equity and Lindsell Train UK Equity. These products are managed by portfolio managers, who try to outperform the market.

Alternatively, I could invest in individual stocks. This approach is higher risk but the potential rewards are greater.

For example, had I invested $5k in Apple shares 10 years ago, I’d now have about $50k (not including dividends). There are unlikely to be many funds that have produced that kind of return for investors over the last decade.

Personally, I’d use a mix of all three approaches. This would lower my overall risk while also giving me the chance to generate high returns.

Hitting £100k

How long would it take me to hit £100k with this approach?

Well, that would depend on my level of contributions and the returns I was able to generate from the stock market.

However, as an example, if I contributed £600 a month into my ISA and generated a return of 9% per year on my money over the long term, I’d hit the £100k mark in less than 10 years.

Edward Sheldon has positions in Apple and Fundsmith Equity. The Motley Fool UK has recommended Apple. 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 »