Here’s how I’d aim for a million, by investing £150 a week

Our writer outlines how he’d aim for a million in the stock market through regular saving, disciplined investing, and careful share selection.

| 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.

Warren Buffett at a Berkshire Hathaway AGM

Image source: The Motley Fool

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.

Becoming a stock market millionaire is not easy. Sure, there are some shares with amazing stories like Amazon or Tesla. But a lot of shares also go nowhere fast, or even destroy value, over time. To aim for a million from a standing start takes careful selection of shares.

It also takes money, of course. But that can be broken down into a manageable regular contribution.

What is “manageable” for any specific person will depend on their own financial circumstances. Here, I outline how I would aim for a million by investing £150 a week into carefully selected blue-chip UK shares.

Saving regularly to invest

£150 might not sound like the foundation of a seven-figure fortune (although the first stock purchase by billionaire investor Warren Buffett was three preferred shares in a company then known as Cities Service, for $38 apiece).

But patience and time can reward the long-term investor. £150 week after week adds up. In a year, it would be £7,800. Save like that for a decade and there would be close to £80,000 available to invest.

But that is far from a million pounds. Still, I would take the first step of setting up a share-dealing account or Stocks and Shares ISA and putting £150 into it each week. Clearly however, some magic sauce is needed.

Magic sauce – and more magic sauce

In fact, I would use two investing techniques to add some of that magic sauce to my ISA, that I think could help me realistically aim for a million.

The first is simple. Reinvesting my returns, just like Buffett does. Leaving capital gains and dividends inside my ISA to fund more share purchases is known as compounding.

If I invested £150 a week and compounded my ISA value at 10% a year, after a decade I would have an ISA worth around £130,000.

Focusing on great companies

Good — but still far from a million! So what is the second magic sauce alongside compounding?

Basically, I would aim to invest in just five to 10 superb companies rather than a wider selection of mediocre companies.

The maths here are straightforward. If I bought shares in 20 companies that had a compound annual return of 10% (that is already strong, in my view), I would have earned a million after 28 years.

Investing in just the best of those, achieving a 20% compound annual return, it would take just 18 years.

Learning from Warren Buffett

But finding truly great businesses that compound at 20% annually over decades is rare. Buffett’s Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B) though has seen its per-share market value compound annually at 19.8% since 1965.

How? Berkshire compounds its earnings. It buys into businesses with large user bases that look set to endure, from railways to insurers.

Its portfolio of businesses involves capital-intensive and capital-light firms but what they all have in common is significant cash generation potential.

Buffett looks for competitive advantages when Berkshire invests in a firm. He also focuses on valuation.

I would follow the same principles as I aim for a million. My approach would be to use the principles Buffett has employed at Berkshire to help me identify a few brilliant businesses with attractive share prices.

John Mackey, former CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool’s board of directors. C Ruane has no position in any of the shares mentioned. The Motley Fool UK has recommended Amazon and Tesla. 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

Close-up of British bank notes
Investing Articles

£20,000 for a Stocks and Shares ISA? Here’s how to try and turn it into a monthly passive income of £493

Hundreds of pounds in passive income a month from a £20k Stocks and Shares ISA? Here's how that might work…

Read more »

Snowing on Jubilee Gardens in London at dusk
Investing Articles

£5,000 put into Nvidia stock last Christmas is already worth this much!

A year ago, Nvidia stock was already riding high -- but it's gained value since. Our writer explores why and…

Read more »

Investing Articles

Are Tesco shares easy money heading into 2026?

The supermarket industry is known for low margins and intense competition. But analysts are bullish on Tesco shares – and…

Read more »

Smiling black woman showing e-ticket on smartphone to white male attendant at airport
Investing Articles

Can this airline stock beat the FTSE 100 again in 2026?

After outperforming the FTSE 100 in 2025, International Consolidated Airlines Group has a promising plan to make its business more…

Read more »

Investing Articles

1 Stocks and Shares ISA mistake that will make me a better investor in 2026

All investors make mistakes. The best ones learn from them. That’s Stephen Wright’s plan to maximise returns from his Stocks…

Read more »

Portrait Of Senior Couple Climbing Hill On Hike Through Countryside In Lake District UK Together
Investing Articles

I asked ChatGPT if £20,000 would work harder in an ISA or SIPP in 2026 and it said…

Investors have two tax-efficient ways to build wealth, either in a Stocks and Shares ISA or SIPP. Harvey Jones asked…

Read more »

Investing Articles

How much would I need invested in an ISA to earn £2,417 a month in passive income?

This writer runs the numbers to see what it takes in an ISA to reach £2,417 a month in passive…

Read more »

Investing Articles

Rolls-Royce shares or Melrose Industries: Which one is better value for 2026?

Rolls-Royce shares surged in 2025, surpassing most expectations. Dr James Fox considers whether it offers better value than peer Melrose.

Read more »