3 reasons why I think the FTSE 100 is the best way to save for retirement

You don’t need much more than the FTSE 100 (INDEXFTSE: UKX) and a strict savings plan if you want to retire rich says, Rupert Hargreaves.

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’re saving for retirement, the fastest way to grow your money is to invest it, and today I’m going to explain the three reasons why I think the FTSE 100 could be the only investment you’ll ever need for your retirement portfolio.

1. Income

Studies show that over the long term, dividends account for the bulk of investors’ profits and the FTSE 100 is one of the best dividend indexes in the world. At the time of writing this blue-chip index supports a dividend yield of around 4.4%.

The distribution is an aggregation of the dividends paid by stocks in the index, which makes it relatively safe in my opinion. Indeed, for the yield to drop to zero, every single company in the FTSE 100 would have to eliminate their dividends. I think it is highly unlikely this will ever happen.

2. Diversification

As well as a 4.4% dividend yield, any investor buying the FTSE 100 today will also get a well-diversified portfolio of 100 stocks operating in different sectors, industries and countries around the world. It would be difficult for the average investor to build a portfolio that is just as well diversified themselves without incurring substantial transaction costs, which would depress long-term returns.

Trying to pick which stocks will succeed over the next five or 10 years is exceptionally difficult and even the experts get it wrong most of the time. If you buy the FTSE 100, you don’t need to worry about this issue. All you need to do is click ‘buy’, sit back and relax because the index will give you exposure to some of the largest companies in the world today.

What’s more, several times a year the index is rebalanced, and struggling businesses are kicked out. To put it another way, the FTSE 100 will give you a managed portfolio of some of the world’s largest companies without you having to put in any extra effort.

3. Low cost

The third and final reason why I believe the FTSE 100 is the best way to save for retirement is cost.

Because the FTSE 100 is one of the world’s leading stock indexes, investors all around the world with hundreds of billions of dollars to invest are looking for exposure. This demand means that fund providers can offer exposure at a relatively low-cost, which is excellent news for average investors such as us.

Today, the cheapest FTSE 100 tracker on the market charges just 0.04% per annum in fees. The impact low fees have on your portfolio over the long term cannot be understated.

Assuming an average annual return of 7%, £10,000 invested for 10 years with an annual management charge of 0.04%, will grow into £19,592 according to my calculations. However, the same investment growing at the same rate over the same time frame would be worth just £17,798 with an annual fee of 1%, that is a difference of £1,794 or 10%.

The bottom line

So overall, based on the reasons outlined above, I believe an investment in the FTSE 100 could be the best way to prepare yourself for retirement.

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

Close-up of British bank notes
Investing Articles

£5,000 invested in Greggs shares at the start of 2025 is now worth…

This year's been extremely grim for FTSE 250-listed Greggs -- but having slumped more than 40%, could its shares be…

Read more »

Investing Articles

Looking for shares to buy as precious metals surge? 3 things to remember!

Gold prices have been on a tear. So has silver. So why isn't this writer hunting for shares to buy…

Read more »

British Pennies on a Pound Note
Investing Articles

Up 27% in 2025, might this penny share still be a long-term bargain?

Christopher Ruane's happy that this penny share he owns has done well in 2025. But it's still cheaper now than…

Read more »

Two employees sat at desk welcoming customer to a Tesla car showroom
Investing Articles

Here’s what a single share of Tesla stock cost in January – and what it’s worth now!

Tesla stock's moved up this year -- and it's had a wild ride along the way. Christopher Ruane explains why…

Read more »

Rolls-Royce's Pearl 10X engine series
Investing Articles

Rolls-Royce shares have done it again in 2025! But could the party be over?

2025's been another storming year for Rolls-Royce shares -- and this writer missed out! Might it still be worth him…

Read more »

Businessman with tablet, waiting at the train station platform
Investing Articles

Is this the last chance to buy these FTSE 100 shares on the cheap?

Diageo and Barratt Redrow's share prices have tanked. Is this the opportunity investors seeking cheap FTSE 100 shares have been…

Read more »

Young mixed-race woman jumping for joy in a park with confetti falling around her
Investing Articles

Legal & General shares yield a staggering 8.7% – will they shower investors with income in 2026?

Legal & General shares pay the highest dividend yield on the entire FTSE 100. Harvey Jones asks whether there is…

Read more »

A pastel colored growing graph with rising rocket.
Investing Articles

With its 16% dividend yield, is it time for me to buy this FTSE 250 passive income star?

Ithaca Energy’s 16% dividend yield looks irresistible -- but with tax headwinds still blowing strong, can this FTSE 250 passive…

Read more »