Share your opinion and earn yourself a free Motley Fool premium report!

We are looking for Fools to join a 75 minute online independent market research forum on 15th / 16th December.

To find out more and express your interest please click here

What is the best way to invest £100k?

Harvey Jones shows how you can turn £100,000 into a far bigger sum.

| 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.

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.

If you’ve got a large sum to invest like £100,000, then lucky you. However, that kind of money is quite a responsibility. You have to invest it wisely, otherwise you risk frittering it away.

Start safe

One option may be to simply leave it in the bank. That’s certainly likely to be your first port of call, while you work out what to do with your good fortune.

Your money is safe in cash because the government-backed Financial Services Compensation Scheme (FSCS) protects the first £85,000 of savings in your account (doubled to £170,000 for joint accounts). If it’s a windfall you may have even more protection, through something called FSCS temporary high balance protection.

This lifts FSCS protection to £1m for a six-month period, if you have more in your account due to ‘certain life events’ such as a property sale, insurance payout, personal injury compensation, divorce, redundancy, retirement, or an inheritance.

Cash will shrink your money

Cash is the obvious short-term home for your money but you don’t want to leave it sitting there for years. The best you can get on easy access right now is less than 1.5%, and then only if you shop around.

After five years at that rate, your money will have grown to £107,278. However, if inflation averages 2.7%, the value of your money in real terms will have fallen to just £94,293.

That’s why, if saving for five years or longer, you should consider putting a large chunk of your money into the stock market, using your Stocks and Shares ISA allowance to take all your returns free of tax.

Over the longer run, the average annual return of the FTSE 100 is 7%, but with hefty volatility in between, as the table below shows. In 2016 and 2017, the index grew 19.07% and 11.95%, respectively, whereas last year it fell by 8.73%. Growth in 2015 and 2014 was negligible.

FTSE 100 Total annual return
2018 -8.73%
2017 11.95%
2016 19.07%
2015 -1.32%
2014 0.73%

Don’t let that volatility put you off. The longer you are able to keep your money invested, the more stock markets makes sense. Measured over decades, short-term volatility has minimal impact, whereas the higher returns steadily roll up, especially if you reinvest your dividends for growth.

Spread your wealth around

Personally, I wouldn’t invest a large sums like £100,000 all in one go, that will backfire if share prices crash next day. Instead, I would steadily feed it in over a number of months, taking advantage of any stock market dips.

So where do you put your money? You could keep things simple and spread your risk by investing in a FTSE 100 tracker, which gives you exposure to the largest blue-chip companies in the UK.

As you become more confident, you could look to generate a higher return, by investing in individual company stocks and shares. This is riskier, but can be more rewarding. Motley Fool is crammed full of stock tips to guide your choice.

With the right approach, and a bit of patience, you could even turn your £100,000 into a £1m investment portfolio.

Harvey Jones has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. 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

Investing Articles

The BP share price could face a brutal reckoning in 2026

Harvey Jones is worried about the outlook for the BP share price, as the global economy struggles and experts warn…

Read more »

Midnight is celebrated along the River Thames in London with a spectacular and colourful firework display.
Investing Articles

How on earth did Lloyds shares explode 75% in 2025?

Harvey Jones has been pleasantly surprised by the blistering performance of Lloyds shares over the last year or two. Will…

Read more »

Group of four young adults toasting with Flying Horse cans in Brazil
Investing Articles

Down 56% with a 4.8% yield and P/E of 13 – are Diageo shares a generational bargain?

When Harvey Jones bought Diageo shares he never dreamed they'd perform this badly. Now he's wondering if they're just too…

Read more »

Number three written on white chat bubble on blue background
Investing Articles

Could these 3 holdings in my Stocks and Shares ISA really increase in value by 25% in 2026?

James Beard’s been looking at the 12-month share price forecasts for some of the positions in his Stocks and Shares…

Read more »

National Grid engineers at a substation
Investing Articles

2 reasons I‘m not touching National Grid shares with a bargepole!

Many private investors like the passive income prospects they see in National Grid shares. So why does our writer not…

Read more »

Number 5 foil balloon and gold confetti on black.
Investing Articles

£10,000 invested in Greggs shares 5 years ago would have generated this much in dividends…

Those who invested in Greggs shares five years ago have seen little share price growth. However, the dividends have been…

Read more »

Rolls-Royce Hydrogen Test Rig at Loughborough University
Growth Shares

Here is the Rolls-Royce share price performance for 2023, 2024, and 2025

Where will the Rolls-Royce share price be at the end of 2026? Looking at previous years might help us find…

Read more »

Investing Articles

This FTSE 250 stock could rocket 49%, say brokers

Ben McPoland takes a closer look at a market-leading FTSE 250 company that generates plenty of cash and has begun…

Read more »