How do I build a million pound Stocks and Shares ISA?

With a regular savings plan, a decent investment strategy, and a long-term mindset, a £1m Stocks and Shares ISA may be achievable.

| More on:

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.

ISA Individual Savings Account

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.

Creating a million-pound Stocks and Shares ISA is quite a common financial goal these days. With a seven-figure tax-free investment portfolio, an investor could be set up for life.

It could be an achievable goal. Here’s a look at how one could aim at getting there.

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.

Prioritising ISA savings

To my mind, there are two crucial things to consider when aiming to build a £1m ISA. The first is make regular contributions into their account.

Now this doesn’t necessarily mean maxing out the £20k annual allowance every year. Across the UK, only around 800,000 people can afford to do this on a regular basis.

What it does mean however, is prioritising ISA savings (ie paying into an ISA on payday).

Whether it’s £3k invested a year or £10k, it all adds up. Especially if the money’s working hard for you. Though, of course, investing puts your capital at risk and returns are never guaranteed.

Developing a proper investing strategy

This brings me to the next step, which is putting a proper investment strategy in place. This is the really important part of the process.

By investing properly, and taking advantage of the power of compounding, the potential’s there to hit that £1m mark possibly sooner.

Now there are many different strategies investors can pursue within a Stocks and Shares ISA.

One straightforward strategy is to just invest in a low-cost global index fund, such as the iShares Core MSCI World UCITS ETF (LSE: SWDA). This is a simple index tracker product that provides exposure to around 1,500 companies from 23 developed countries.

This allows access to a lot of top companies. For example, Apple, Microsoft, and Alphabet (Google) are all among the top 10 holdings.

Over the last five years (to the end of March), this ETF has returned about 77%, which translates to an annual return of about 12%.

However, as always, past performance isn’t an indicator of future returns. If we were to see a stock market wobble in the years ahead due to geopolitical or economic issues the ETF could provide lower returns.

Another option is to invest in a selection of high-quality individual stocks in the hope of achieving higher returns than a tracker fund.

Now this is a riskier approach to investing. It’s also more time consuming. However, pick the right stocks, and the rewards can be worth it.

Just a look at the gains delivered by Amazon over the last decade. Had I invested £10,000 in this company 10 years ago, I’d now have around £150,000.

Of course, investors don’t have to choose between these approaches. Personally, I like the idea of doing both.

By putting a large chunk of my Stocks and Shares ISA capital into tracker funds, but also allocating some money to stocks, I could potentially generate excellent returns while keeping my risk levels lower.

How long would it take?

How long would it take me to build a £1m ISA using this approach? Well, it would depend on how much I put into my account and the returns I was able to achieve. After all, I could lose money as well as make it.

But I calculate that if I put £1,000 a month into my ISA and I made a 10% return over the long term (acknowledging that the average return on ISAs over the past 10 years has been less than 10%), I could hit the £1m mark in around 23 years.

Ed Sheldon has positions in Alphabet, Amazon, Apple, and Microsoft. The Motley Fool UK has recommended Alphabet, Amazon, Apple, and Microsoft. Suzanne Frey, an executive at Alphabet, is a member of The Motley Fool’s board of directors. John Mackey, former CEO of Whole Foods Market, an Amazon subsidiary, 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

Warren Buffett at a Berkshire Hathaway AGM
Investing Articles

Can someone invest like Warren Buffett with a spare £500?

Christopher Ruane explains why an investor without the resources of billionaire Warren Buffett could still learn from his stock market…

Read more »

Investing Articles

Can these 2 incredible FTSE 250 dividend stocks fly even higher in 2026?

Mark Hartley examines the potential in two FTSE 250 shares that have had an excellent year and considers what 2026…

Read more »

Thoughtful man using his phone while riding on a train and looking through the window
Investing Articles

Is 45 too late to start investing?

Investing at different life stages can come with its own challenges -- and rewards. Our writer considers why a 45-year-old…

Read more »

Hand of person putting wood cube block with word VALUE on wooden table
Investing Articles

UK shares look cheap — but the market might be about to take notice

UK shares have traded at a persistent discount to their US counterparts. This can create huge opportunities, but investors need…

Read more »

Investing Articles

This FTSE 100 growth machine is showing positive signs for a 2026 recovery

FTSE 100 distributor Bunzl is already the second-largest holding in Stephen Wright’s Stocks and Shares ISA. What should his next…

Read more »

Investing Articles

I asked ChatGPT for the best FTSE 100 stocks to buy for passive income in 2026 and it said…

Paul Summers wanted to learn which dividend stocks an AI bot thinks might be worth buying for 2026. Its response…

Read more »

ISA Individual Savings Account
Investing Articles

Stop missing out! A Stocks and Shares ISA could help you retire early

Investors who don't use a Stocks and Shares ISA get all the risks that come with investing but with less…

Read more »

Investing Articles

Will Greggs shares crash again in 2026?

After a horrible 2025, Paul Summers takes a look at whether Greggs shares could sink even further in price next…

Read more »