Could a FTSE 100 tracker make you a millionaire?

How the FTSE 100 (INDEXFTSE:UKX) could help you secure your financial future.

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.

The easiest way to invest in the elite blue chip companies of the UK stock market is to buy a FTSE 100 (INDEXFTSE: UKX) tracker fund. Such a fund simply tracks the performance of the UK’s biggest 100 companies — the likes of Lloyds, BP, GlaxoSmithKline and Vodafone — earning you the ‘market return’ (minus charges).

Investing in a tracker requires virtually no knowledge, skill or time. It’s dead easy. Anyone can do it. But can such a simple way of investing make you a millionaire? And how long do you need to invest for?

The most powerful force in the universe

One of the oldest trackers around is the HSBC FTSE 100 Index Fund (Accumulation). Accumulation simply means that dividends received from the companies are reinvested to buy more shares. This ‘compounding’ as it’s called has been described by Einstein as “the most powerful force in the universe”.

The HSBC tracker was launched in 1994 and had its 22nd anniversary last Friday (30 September). I’ve calculated some returns for various holding periods, shown in the table below.

Holding period (years) No. of periods No. of positive periods No. of negative periods Best return (%) Worst return (%) Average return (%)
5 18 13 5 124.3 (26.5) 31.2
6 17 14 3 138.8 (17.0) 32.5
7 16 15 1 83.2 (5.9) 33.4
8 15 14 1 85.1 (10.4) 38.0
9 14 12 2 81.2 (4.6) 45.2
10 13 13 0 105.4 5.3 56.4
15 8 8 0 137.4 40.9 80.4
22 1 1 0 296.2 296.2 296.2

As you can see, investing over the shorter timescales was risky. In five out of the 18 five-year periods you’d have lost money. And returns were volatile. If you were lucky you’d have made a 124.3% profit; if you were unlucky you’d have lost 26.5% of your investment.

Over short timescales, investing in the stock market is a pure gamble. In the case of the HSBC tracker, there was the risk of a loss all the way up to and including the nine-year holding periods. However, the longer you’re in the market, the less of a gamble it becomes. The tracker produced positive returns for holding periods of 10 years plus.

Furthermore, you can see from the average return how ‘compounding’ really took off as the investment timescale lengthened.

Aiming for a million

How much would you have needed to invest in the HSBC tracker fund when it launched 22 years ago to be a millionaire today? The answer’s just over a quarter of a million quid — a substantial sum.

However, double the holding period to 44 years at the same compound annual growth rate (CAGR) of 6.46% and the initial investment required to reach the magic million would come down to £64,000. For a 66-year holding period — we might imagine grandparents investing in a tracker for their newborn grandchild — just £16,100 would be enough to do the trick.

Of course, most people don’t have such an investment made on their behalf at birth. Nor do they have a spare quarter of a million quid or even £64,000 to invest in early adulthood.

However, a million-pound pot should be achievable for many of us. By regularly investing what we can from as early as we can to benefit from long-term compounding, and upping our investment significantly in later life as children leave home, our earnings reach their peak and as we become mortgage-free, we should be able to look forward to a well-funded retirement.

What’s more, tracker fund charges have come down massively in recent years. As such, it’s entirely possible that the 6.46% CAGR achieved over the last 22 years will be higher going forward. Which means that with disciplined investing a well-funded retirement could come all the sooner.

G A Chester has no position in any shares mentioned. The Motley Fool UK owns shares of and has recommended GlaxoSmithKline. The Motley Fool UK has recommended BP. 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 »