£20k to invest? Here’s how I’d aim to turn it into £100k using Warren Buffett’s strategy

Warren Buffett has generated extraordinary returns over the long term. Here, Ed Sheldon explains how he’d invest £20k today using Buffett’s approach.

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.

Middle-aged black male working at home 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.

It’s fair to say that Warren Buffett knows how to invest. Since 1965, the stock market guru has generated a return of around 20% a year for his investors.

Here, I’m going to discuss how I’d invest £20k today using Buffett’s strategy. With a disciplined approach, I reckon I could turn the capital into £100k over time.

He focuses on quality

Buffett is often thought of as a value investor. However, these days, he is more of a ‘quality’ investor.

It’s far better to buy a wonderful company at a fair price than a fair company at a wonderful price,” he’s has famously said.

Now, when it comes to finding high-quality companies, one thing he looks for is long-term growth potential.

Your goal as an investor should be simply to purchase, at a rational price, a part interest in an easily understood business whose earnings are virtually certain to be materially higher, five, 10, and 20 years from now,” he adds.

Another thing is a high return on capital (a measure of profitability). Companies that generate these consistently over time tend to be great long-term investments due to the fact they can compound their earnings.

As Buffett’s business partner Charlie Munger says: “If a business earns 18% on capital over 20 or 30 years, even if you pay an expensive looking price, you’ll end up with one hell of a result.”

Finding Buffett-type stocks

Putting all this together, if I was to apply Buffett’s strategy today, my goal would be to find, and invest in, high-quality businesses that are very profitable and have substantial long-term growth potential.

Now, the good news is that one doesn’t need to look too far to find these kinds of companies. A great example, in my view, is alcoholic beverages giant Diageo (which Buffett owns).

It has plenty of growth potential due to the fact that it generates around 40% of its revenues in the emerging markets where wealth is growing rapidly.

It’s also very profitable. Over the last five years, return on capital has averaged 14.3%. And with the stock trading on a forward-looking P/E ratio of 19, it can be purchased at a ‘rational’ price.

Another good example is Visa (which Buffett also owns).

With trillions of transactions set to go digital in the years ahead, it has plenty of growth potential. And like Diageo, it’s very profitable (five-year average return on capital of 24.3%).

Meanwhile, with a forward-looking P/E ratio of 23, it’s not particularly expensive.

Turning £20k into £100k

How long would it take me to turn £20k into £100k using Buffett’s approach?

Well, assuming I built a well-diversified portfolio with 20+ stocks (to minimise stock-specific risks), I reckon I could achieve a return of around 9% a year over the long run (returns would vary from year to year). History shows that’s possible with stocks.

With a 9% return a year (and no setbacks), it would take me about 19 years to grow my £20k into £100k.

Of course, if I was to add to my investment on a regular basis, I could shorten the time needed to reach £100k significantly.

For example, if I was to invest another £5k a year, I could potentially hit the £100k mark in less than nine years.

Edward Sheldon has positions in Diageo Plc and Visa. The Motley Fool UK has recommended Diageo 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

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 »