Why it’s always a great time to drip £100 a month into the FTSE 100

I reckon compounding and pound/cost averaging could work to drive a decent investing return with the Footsie.

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 have a long-term investing horizon in mind I think there’s a good chance that investing regularly in an accumulation FTSE 100 index tracker fund will give you a better total return than investing money in an interest-paying bank account.

The ‘accumulation’ part of the description means that the dividends you earn from the fund are automatically reinvested back into the fund. If you reinvest your dividends like that, you’ll be on the road to compounding your money, and compounding is key to building wealth.

Smoothing out some of the ups and downs

Right now, the FTSE 100 has a dividend yield running above 4%, which is a better return than many bank accounts pay in interest. That’s a good start. But the value of your invested money will go up and down with the value of the index as the 100 or so shares making up the index fluctuate.

But if you invest, say, £100 every month, you’ll be able to smooth out some of the volatility because of pound/cost averaging. In other words, when the index cycles down, you’ll be getting more for your money, and when the index cycles up, you won’t be investing all your money near the highs.

Over the long haul, I think your FTSE 100 investment could do well. For example, even in the 10-year period between 2008 and 2017 when there was a lot of volatility in the FTSE 100, it delivered a total return of 74%, which works out at 5.7% a year, beating most bank accounts hands down.

The total returns over the period looked like this:

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

(28.3%)

27.3%

12.6%

(2.2%)

10%

18.7%

0.7%

(1.3%)

19.1%

11.9%

The figures in brackets represent a negative return during the year, so the volatility looks frightening. But even though the index lurched through last decade’s credit-crunch, it still managed that 74% total return over 10 years. Imagine how good the total returns might be if things go well.

The next 10 years could be even better

In the past, the FTSE 100 has trebled in value over a 10-year period and some believe it could do so again. I think the theory is attractive because it makes sense to me that we could be entering a new period of prosperity and economic growth after what has been a long period of economic recovery since the financial crisis around 2008/9.

Imagine what your FTSE 100 investment could look like if the index trebles in value and you’ve compounded your gains along the way by reinvesting the dividends in an accumulation fund.

However, even if the FTSE 100 falls short of that kind of performance in the years to come, I think that the twin weapons of compounding and pound/cost averaging could work to drive a decent investing return if you make regular payments into a tracker fund.

With a 10-year-plus investment time horizon in mind, I reckon it’s always a great time to drip £100 a month into the FTSE 100.

Kevin Godbold has no position in any 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 3d arrows with rocket
Investing Articles

Up 25% YTD! Is this red-hot penny stock still ‘cheap’?

This penny stock has been on fire in 2026. Ken Hall takes a closer look at the investment story behind…

Read more »

Man smiling and working on laptop
Investing Articles

Stock market correction? A passive income opportunity!

Looking to turbocharge your passive income? The stock market correction could be a once-in-a-decade chance to do just that, says…

Read more »

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

Are investors running scared of Babcock and BAE Systems shares?

BAE Systems shares have had a brilliant run, and other UK defence stocks have been flying too. But Harvey Jones…

Read more »

Mature black woman at home texting on her cell phone while sitting on the couch
Investing Articles

As the FTSE 100 falls, savvy investors are looking for stocks to buy for the rebound

Many FTSE stocks have now fallen 10% or more from their 2026 highs. For long-term investors, exciting opportunities are emerging.

Read more »

Portrait Of Senior Couple Climbing Hill On Hike Through Countryside In Lake District UK Together
Investing Articles

Should investors consider buying resilient Admiral Group and Tesco shares as markets wobble?

Harvey Jones is impressed by how Tesco shares have held up in the current market volatility, while Admiral has been…

Read more »

DIVIDEND YIELD text written on a notebook with chart
Investing Articles

Down 15% in a month and yielding 7.5%! Should I buy even more of my favourite dividend stock?

Harvey Jones says this brilliant FTSE 100 dividend stock is suddenly cheaper due to recent market volatility. And the yield…

Read more »

Abstract bull climbing indicators on stock chart
Growth Shares

3 growth shares for an ISA that have beaten the FTSE 100 for the past 5 years

Jon Smith points out several growth shares that have outperformed the broader market over a long period of time, with…

Read more »

Calendar showing the date of 5th April on desk in a house
Investing Articles

Time’s running out for our 2025/26 Stocks and Shares ISA plans!

Never mind the stock market wobble, it's time to turn our attention to our Stocks and Shares ISA investments for…

Read more »