How UK investors can use Warren Buffett’s winning strategy to aim for a £1m ISA

Warren Buffett’s investment strategy isn’t that complicated. It comes down to one simple concept that anyone can take advantage of.

| 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.

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

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.

Over the last 60 years, Warren Buffett has generated a return of about 20% per year from the stock market. This has led to an extraordinary level of wealth for both him and his long-term investors.

What’s interesting is that Buffett’s strategy really isn’t that complicated (it’s actually very simple). So UK investors could potentially clone it and aim for an enormous ISA.

The secret is…

The secret to Buffett’s success really comes down to one key concept – compounding. This is the process of earning a return on previously generated returns.

A lot of investors understand the importance of compounding and use it themselves. What has set Buffett apart, however, is that he has used this process in two distinct ways. Let me explain.

A focus on ‘compounders’

Buffett started off as a value investor. And he had a lot of success with this approach. Yet over time, he realised that he could generate higher returns by investing in companies known as ‘compounders’. These are high-quality businesses that can continually reinvest their profits to generate growth and get bigger and bigger.

With these kinds of stocks, gains can be absolutely epic over the long term (unlike a typical value stock where gains drop off when the fair value is achieved). So he shifted his focus to these types of businesses (eg Apple) and held on to them for the long term while they compounded their returns internally.

Reinvesting success

Additionally, he compounded his own portfolio returns. Instead of paying dividends to investors (he only ever paid one from his company Berkshire Hathaway), he would reinvest all his gains.

This double use of compounding has paid off in a big way. Over the long term, it has led to gigantic returns.

My life has been a product of compound interest.
Warren Buffett

Copying Buffett

Given the simplicity of Buffett’s strategy, UK investors could easily replicate it. All they’d really need to do is put together a portfolio of high-quality compounders and hold the stocks for the long term while they get bigger and bigger.

Over the long run, this approach could lead to substantial wealth. Let’s say that an investor was to start out with £20,000 in an ISA, they added in another £10,000 every year, and they were able to generate a 9% return a year after fees. In this scenario, they’d get to £1m in about 25 years.

A Buffett-style stock

As for stock ideas, one compounder that could be worth considering today is Amazon (NASDAQ: AMZN). This is a stock Buffett currently holds in his Berkshire Hathaway portfolio.

Previously, Amazon has continually generated strong growth and then reinvested for future growth (expanding into new areas such as cloud computing, artificial intelligence (AI), streaming, and digital advertising). This had led to a huge increase in market-cap and exponential gains for investors.

Over the last decade, for example, the stock has risen about 10-fold. So anyone who has been in it for the long term has done well.

Of course, there are no guarantees that Amazon will be able to continue on this growth trajectory. Today, the company is facing plenty of competition in both e-commerce and cloud computing.

I’m optimistic about its long-term prospects however, given the company’s diversified nature. I’ve made the growth stock one of my largest holdings.

Edward Sheldon has positions in Apple and Amazon. The Motley Fool UK has recommended Apple and Amazon. 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

Businessman hand stacking money coins with virtual percentage icons
Investing Articles

£5,000 invested in Tesco shares 5 years ago is now worth this much…

Tesco share price growth has been just part of the total profit picture, but can our biggest supermarket handle the…

Read more »

Investing Articles

Here’s why I’m bullish on the FTSE 100 for 2026

There's every chance the FTSE 100 will set new record highs next year. In this article, our Foolish author takes…

Read more »

Thoughtful man using his phone while riding on a train and looking through the window
Growth Shares

UK interest rates fall again! Here’s why the Barclays share price could struggle

Jon Smith explains why the Bank of England's latest move today could spell trouble for the Barclays share price over…

Read more »

Man hanging in the balance over a log at seaside in Scotland
Investing Articles

2 out-of-favour FTSE 250 stocks set for a potential turnaround in 2026

These famous retail stocks from the FTSE 250 index have crashed in 2025. Here's why 2026 might turn out to…

Read more »

Young female business analyst looking at a graph chart while working from home
Investing Articles

Down over 30% this year, could these 3 UK shares bounce back in 2026?

Christopher Ruane digs into a trio of UK shares that have performed poorly this year in search of possible bargains…

Read more »

Mature people enjoying time together during road trip
Investing Articles

Yields up to 8.5%! Should I buy even more Legal & General, M&G and Phoenix shares?

Harvey Jones is getting a brilliant rate of dividend income from his Phoenix shares, and a surprising amount of capital…

Read more »

Light trails from traffic moving down The Mound in central Edinburgh, Scotland during December
Investing Articles

Up 7.5% in a week but with P/Es below 8! Are JD Sports Fashion and easyJet shares ready to take off?

easyJet shares have laboured in 2025, but suddenly they're flying. The same goes for JD Sports Fashion. Both still look…

Read more »

US Stock

I think this could be the best no-brainer S&P 500 purchase to consider for 2026

Jon Smith reveals a stock from the S&P 500 that he feels has the biggest potential to outperform the index,…

Read more »