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

Want to become a stock market millionaire? Here’s what NOT to do

You need to avoid these mistakes if you want to become rich.

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.

Making a million in the stock market might seem like an impossible task at first. But, if you have a regular savings plan in place and invest your money sensibly, it is entirely possible to retire with a £1m pension pot.

For example, to build a pot of £1.1m all you need to do is put away £400 a month for 40 years and achieve an average annual return on investment of 7% (slightly below the FTSE 250 annual return for the past decade).

However, most investors fail to make the most of the opportunities offered to them by the market because they make a few critical mistakes.

So, if you want to retire a millionaire, here is what NOT to do with your money.

What NOT to do

In reality, there are only two things we can control as investors. When we buy and sell, and fees. We have no control over the global economy or day-to-day market movements. With this being the case, we have to make the most of what we can control.  

The simplest way to improve returns is to cut costs. Even though there has been an enormous shift away from high-cost investment funds over the past 10 years, there are still some investment managers out there who believe they can get away with charging 2% a year or more to look after your money — nothing short of daylight robbery.

The numbers say a thousand words. If you invest £10,000 of your hard earned cash into an FTSE 250 tracker fund with an expense ratio of 0.2%, assuming an average annual return of 7%, over an investment horizon of four decades, this initial £10,000 investment will grow to £145,000 including fees. 

In the same scenario where fees are 2% per annum rather than 0.2%, after 40 years compounding, the end value is only £72,000. A staggering difference of £73,000.

So, the first step to becoming a millionaire retiree is to search around for the cheapest funds and broker accounts.

You can’t control the market 

Tip number two is harder to implement. Most investors over trade, and not only does this increase your average cost, but studies have shown that overtrading usually results in investors missing the majority of market gains. 

Indeed, studies show that if investors try to time the market, 99% of the time they get out too soon or too late and don’t buy back in until the bottom has well and truly passed.

The best tactic to ensure you don’t make the same mistake, is to ignore the market on a day-to-day basis. Warren Buffett has always said he makes investments based on the assumption that the market will close tomorrow and not open again for another 10 years. If you are saving for retirement, it might be best to employ the same tactic.

These aren’t the only common mistakes investors make, but they are the easiest to prevent. Ignoring day-to-day market movements and finding the cheapest investment offerings will put you on the right track to making a million.

Rupert Hargreaves owns no share 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

Portrait of pensive bearded senior looking on screen of laptop sitting at table with coffee cup.
Investing Articles

From hero to zero: are Lloyds shares a ticking time-bomb after a 70% gain in 2025?

In 2025, Lloyds shares have produced around 10 years’ worth of average stock market gains. Could they be heading for…

Read more »

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

Which stock market is best: the UK or US? Here’s how British investors can benefit regardless

Stock market diversification helps spread risk and capitalise on growth and income. Mark Hartley considers the options for British investors.

Read more »

Exterior of BT Group head office - One Braham, London
Investing Articles

Will the epic BT share price surge 77% in 2026?

BT's share price is tipped to rise next year. Discover what could drive the FTSE stock higher -- and what…

Read more »

Friends at the bay near the village of Diabaig on the side of Loch Torridon in Wester Ross, Scotland. They are taking a break from their bike ride to relax and chat. They are laughing together.
Investing Articles

I asked ChatGPT for 5 world-class UK stocks for a retirement portfolio. Here’s what it gave me

Searching for top-quality UK stocks for a retirement portfolio? Here are some names that the world's most popular generative AI…

Read more »

Happy male couple looking at a laptop screen together
Investing Articles

I just asked ChatGPT a really stupid question about FTSE 100 stocks and it said…

Harvey Jones insulted artificial intelligence by asking it a very basic question about which FTSE 100 stocks to buy and…

Read more »

Road trip. Father and son travelling together by car
Growth Shares

The share price of my favourite FTSE 100 growth stock can’t stop falling. Time to buy?

Paul Summers loves the near-monopoly this FTSE 100 company enjoys. But he's also concerned its shares have tumbled over 20%…

Read more »

UK coloured flags waving above large crowd on a stadium sport match.
Dividend Shares

Shock news: over 1 year, the FTSE 100 is beating the S&P 500!

For most of the last 15 years, the US S&P 500 index has thrashed the UK's FTSE 100. However, this…

Read more »

Aerial shot showing an aircraft shadow flying over an idyllic beach
Investing Articles

Why are investors flooding into IAG shares this week?

In the last week, investors have been snapping up IAG shares like there's no tomorrow. What could have sparked the…

Read more »