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.

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.

You’re reading a free article with opinions that may differ from The Twelfth Magpie’s Premium Investing Services. Become a member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn more, and get a free 'Best Buy Now' stock!.

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).

Should you buy Rolls Royce shares today?

Before you decide, please take a moment to review this report first. Despite ongoing uncertainties from US tariffs to global conflicts, Mark Rogers and his team believe many UK shares still trade at substantial discounts, offering savvy investors plenty of potential opportunities to learn about.

That’s why this could be an ideal time to secure this valuable research – Mark’s analysts have scoured the markets to reveal 5 of his favourite long-term ‘Buys’. Please, don’t make any big decisions before seeing them.

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

Abstract bull climbing indicators on stock chart
Investing Articles

FTSE 250 stock CMC’s shares have rocketed 51%! What’s going on?

CMC Markets' shares have surged by double-digits today after a strong full-year trading update. Is the FTSE 250 company now…

Read more »

A row of satellite radars at night
Investing Articles

Will I buy SpaceX at £100 a share in my SIPP?

Ben McPoland is considering adding SpaceX stock to his SIPP on 12 June. Might this be a no-brainer buy-and-hold opportunity?

Read more »

Young brown woman delighted with what she sees on her screen
Investing Articles

Aberdeen shares are back in the FTSE 100 — is this turnaround stock just getting started?

Following its return to the FTSE 100, Andrew Mackie examines whether Aberdeen's shares could be on the cusp of a…

Read more »

Shot of an young mixed-race woman using her cellphone while out cycling through the city
Investing Articles

Down 65% with a 5.65% yield! Is this dividend share a once-in-a-decade buy? 

Harvey Jones says this dividend share is still posting decent profits at a challenging time. Its low valuation and high…

Read more »

Portrait of elderly man wearing white denim shirt and glasses looking up with hand on chin. Thoughtful senior entrepreneur, studio shot against grey background.
Dividend Shares

This is the worst FTSE 100 share over 5 years. Should I sell it?

The worst-performing share in the FTSE 100 has lost two-thirds of its value in the past five years. I own…

Read more »

Arrow symbol glowing amid black arrow symbols on black background.
Investing Articles

Microsoft’s share price is storming back and it’s not too late to consider buying

Microsoft’s share price has jumped 20% in the blink of an eye. Edward Sheldon believes it can go higher, however,…

Read more »

British pound data
Investing Articles

What’s your plan for a stock market crash?

The stock market might be flying, but the time to think about a crash is before it happens. Fortunately, it…

Read more »

Investing Articles

Will SpaceX stock explode on entry?

The SpaceX IPO is just days away and excitement about the stock has gone into orbit. Harvey Jones is urging…

Read more »