The FTSE 100 could make you a millionaire!

How the FTSE 100 (INDEXFTSE: UKX) can make you 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.

When most people think about the stock market and investing, they think of fast-paced trading and get-rich-quick stories. However, as any seasoned investor will know, the key to long-term sustainable wealth creation isn’t a get-rich-quick strategy and fast-paced trading can be extremely damaging to returns. 

For most investors, slow and steady wealth accumulation using a diversified portfolio is the best way to generate the greatest long-term returns with minimal effort.

A FTSE 100 tracker fund ticks all the boxes here. Over the past few decades, the FTSE 100 (INDEXFTSE: UKX) has generated an average annual return of 5.4% (although the FTSE 100’s current dividend yield is 3.6%), excluding fees, dividends and inflation. 5.4% per annum may not seem like a millionaire-making return at first glance, but if you include dividends, the annual return shoots up to around 9%.

The magic of compounding 

The power of compounding is a beautiful thing. If you invested £10,000 in a FTSE 100 tracker and the index returned a consistent percentage per annum, it would take 54 years to grow your principle into £1m. If you started off with £10,000 and added an extra £1,000 per annum, it would only take 45 years to reach the £1m mark. 

Contributions of £200 a month, or £2,400 per annum would lead to £1m in 38 years and if you added £10,000 a year it would only take 25 years to reach £1m. 

If you topped up a stocks and shares ISA every year with the full allowance of £15,000, it would only take 21 years at an average annual growth rate of 9% to hit the £1m mark.

Don’t lose money 

One of the reasons why such a strategy is best for most investors is the lack of risk. You see, while losing even one or two percentage points of performance per annum can be hugely detrimental to long-term investment performance, a FTSE 100 tracker is so well diversified that there’s almost zero risk of permanent capital impairment. With this being case, tracker investors are more likely to see a steady return on their capital with almost no input on their part.

A £10,000 investment in the FTSE 100 30 years ago would be worth just over £48,441 today assuming a basic growth rate of 5.4%. Let’s say you’re running a portfolio of 30 stocks, which are producing the same returns as the FTSE 100. If in year two, one of the positions goes to zero giving a loss of 3.3%, you only lose £370 at the time but at the end of the three-decade period, the total portfolio value will be only £45,959, an ultimate cost of £2,482. Clearly, this back-of-the-envelope calculation doesn’t reflect the whole picture. There are other things to consider here, but it does highlight a key point. Investors should seek to avoid a permanent capital loss at all costs, and a tracker fund is probably the best way to do this.

Overall, the FTSE 100 could make you a millionaire if you buy a low-cost tracker fund and invest with a long-term outlook.

Rupert Hargreaves has no position in any shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors.

More on Investing Articles

A senior man and his wife holding hands walking up a hill on a footpath looking away from the camera at the view. The fishing village of Polperro is behind them.
Investing Articles

Is 50 too old to start buying shares?

Christopher Ruane explains why 'better late than never' is key to his thinking about whether 50's too old to start…

Read more »

Two male friends are out in Tynemouth, North East UK. They are walking on a sidewalk and pushing their baby sons in strollers. They are wearing warm clothing.
Investing Articles

Here’s what £150 a month in a Junior ISA could be worth by 2045…

You might be surprised to learn by how large a Junior ISA portfolio could become inside 20 years from modest…

Read more »

Investing Articles

This red hot equity fund in my SIPP returned 12.6% in the first 2 months of 2026

This global equity fund is delivering huge returns for Edward Sheldon’s SIPP in 2026, despite all the risks and uncertainty…

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

Want to retire richer? Here’s Warren Buffett’s golden rule to build wealth

If you want to build wealth for a richer retirement, then following Warren Buffett’s golden rule might be the best…

Read more »

Black woman using smartphone at home, watching stock charts.
Investing Articles

Get ready for stock market volatility…

As conflict in the Middle East makes share prices fluctuate, what strategies can investors use to try and find opportunities…

Read more »

British Isles on nautical map
Investing Articles

Why the FTSE 100 fell almost 5% this week

Declines in mining shares dragged the FTSE 100 down after a strong start to the year. Is the pullback an…

Read more »

Middle aged businesswoman using laptop while working from home
Investing Articles

How much do you need to invest in US stocks to earn a £2,000 monthly passive income?

Is it possible to target several thousand pounds of passive income each month by buying US growth stocks? Absolutely –…

Read more »

A mature woman help a senior woman out of a car as she takes her to the shops.
Investing Articles

How big does your ISA need to be to earn £1,000 a month in passive income?

Andrew Mackie explains how a long-term ISA strategy can help investors build a chunky £12,000 passive income in less than…

Read more »