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.

Here’s how I’d invest £20k in 2021 to make a million

I think the best way to invest £20k is across a range of diversified investments. That’s how I’d structure my portfolio on my quest to make a million.

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.

I think the best way to invest £20k is in the stock market, particularly if I hope to make a million. I like to follow in the footsteps of billionaire investor Warren Buffett. Both he and his friend and colleague, Charlie Munger, advocate a buy and hold approach to investing. This is a tried and tested method first made famous by value investor Benjamin Graham in his 1934 book, The Intelligent Investor.

Deciding where and how to invest £20k

£20k is a lot of money, so to put it to work I need to consider my options. I’d begin by deciding where to buy my stocks. I think a Stocks and Shares ISA or Self-invested Personal Pension (SIPP), through a reputable broker such as Hargreaves Lansdown or AJ Bell, is the best starting point.

XXX

There will be fees incurred on each transaction, but fees on funds are lower than on individual equities. I’d probably allocate £3,000 to five individual stocks and the remaining £5k I’d split into five funds. If I hope to make a million, these need to be held for a minimum of five years, preferably many more.

Make a million

If I could guarantee a 12% effective annual return on my investment, I could invest £20k, leave it for 35 years and I’d be a millionaire, with a total sum of £1,055,992 accumulated. However, 12% every year for 35 years is pretty difficult to achieve. Therefore, if I could afford to top up my initial £20k investment, with a regular monthly sum, then I could achieve the millionaire mark at a lower interest rate.

With a 9% effective annual rate, £230 a month deposit for 30 years, on top of my initial £20k investment, would result in a final sum of £1,032,282. Or, by upping the timeline and monthly amount to 43 years at £450 respectively, I’d bring the interest rate right down to a very achievable 5% and the final sum would be £1,008,775.

While time, patience, and cash are a given, this goes to show it’s possible for ordinary people to become ISA millionaires.

What stocks should I buy in 2021?

With the likelihood of a vaccine rollout and normality returning in 2021, there may be less volatility in the UK stock markets. However, I don’t think that will be the case until later in the year. I believe the best way to invest £20k is to diversify my portfolio with a mixture of sectors and possibly countries, which may mean choosing an emerging markets fund or solid US stock. But with Brexit out of the way, the UK government wants to focus its efforts on ensuring the UK remains a financial hub of excellence. For this it will encourage investment in technology and financial stocks.

Micro Focus is a tech company that helps companies upgrade and secure their systems. Security is a big issue as cyber attacks have massively increased during the pandemic and I think this will continue to be an area of growth next year. Augmentum Fintech is a venture capital company investing in fast growing fintech businesses. So, I might consider one of these.

It can be difficult to know the best UK shares to buy now on my quest to make a million. I’d probably choose to invest £20k across fintech, oil, pharmaceuticals and emerging markets to ensure diversified exposure to several areas of growth.

Kirsteen has no position in any of the shares mentioned. The Motley Fool UK has recommended Hargreaves Lansdown and Micro Focus. 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

Friends and sisters exploring the outdoors together in Cornwall. They are standing with their arms around each other at the coast.
Investing Articles

£503 buys 14 shares in this FTSE 250 stock that returned 23.9% annually for the last 15 years

This FTSE 250 stock has averaged a huge return for 15 years. At today's price, £503 buys 14 shares. But…

Read more »

Black woman using loudspeaker to be heard
Investing Articles

£1,000 buys 25 shares in this FTSE 100 stock that’s returned 29.2% annually for the last 10 years

This FTSE 100 mining stock has returned close to 30% a year for a decade. At 3,995p, £1,000 buys 25…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

Down 47%, is this growth stock finally worth buying in May?

With a £288m order book and a hidden pipeline of defence and nuclear contracts, is this growth stock now too…

Read more »

House models and one with REIT - standing for real estate investment trust - written on it.
Investing Articles

2 REITs yielding 7%+ to consider for passive income in 2026

A REIT backed by the NHS and another backed by Tesco and Sainsbury's with both yielding 7%+. Here's why I'm…

Read more »

Woman riding her old fashioned bicycle along the Beach Esplanade at Aberdeen, Scotland.
Investing Articles

Just 97 shares of this UK dividend stock generate £238 in passive income

A 5.7% yield, £238 in passive income from just 97 shares, and one of the most divisive dividend stocks on…

Read more »

ISA coins
Investing Articles

£10,000 in an ISA generates a second income of…

The London Stock Exchange is home to some of the world's most generous dividends. But how big a second income…

Read more »

Shot of a senior man drinking coffee and looking thoughtfully out of a window
Investing Articles

Expert recommendations: 2 top income stocks yielding 7%+!

With yields of 7.2% and 7.8% respectively, these two income stocks are catching the eyes of institutional analysts. Should investors…

Read more »

Illustration of flames over a black background
Investing Articles

3 top income-focused stocks to buy in May 2026, according to experts

Looking for a stock to buy for income in May 2026? Experts have flagged these three UK dividend shares as…

Read more »