If I’d put £20,000 into a FTSE 100 tracker a year ago, here’s what I’d have now

The FTSE 100 is having a great year so far this year, and it seems overdue. What’s the best way to benefit from long-term gains?

| More on:

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.

Young Caucasian woman with pink her studying from her laptop screen

Image source: Getty Images

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.

I’m tempted by the thought of putting my cash into a FTSE 100 tracker fund, and then just sitting back and watching.

The FTSE 100 is up 11.7% in the past 12 months, so it seems like a good idea. But it’s been a good year, after a few pretty bad ones.

Still, over the past 20 years (which includes the pandemic crisis, and a load of global economic woes), we’ve seen an average annualised FTSE 100 return of 6.9%.

Over the long term, I reckon that would be pretty good for no effort on my part.

Tracker fund

What might a full year’s Stocks and Shares ISA allowance of £20,000 be worth today, if I’d invested it 12 months ago?

Here’s what the share price of the iShares Core FTSE 100 UCITS ETF (LSE: ISF) looks like over time:

Scary name

Don’t be put off by that complicated long name, as it’s a popular FTSE 100 tracker. The ‘ETF’ part means it’s an exchange-traded fund. And all that means is we can buy and sell shares on the stock market whenever we like, just like any other stock. What could be better?

Anyway, over the past 12 months, the share price is up 11.1%. It’ll always vary a bit from the index, as no tracker can be 100% precise. There are charges to cover too, though they’re modest. And the vagaries of people buying and selling will move it around too.

So that gain alone would have turned £20,000 to £22,220.

Dividends too

But most FTSE 100 companies also pay dividends, and the iShares FTSE 100 is on a forecast 3.8% dividend yield this year.

It could add £762 to the pot.

Now, I must raise some cautions here. This ETF invests its cash across a wide range of the top FTSE 100 stocks. That provides safety in diversification, which I rate as essential for investors.

But even with that, the UK stock market still goes through bad patches. The average Stocks and Shares ISA lost 13.3% in the 2019-20 year. And I think we got off very lightly from the 2020 stock market crash with such a quick rebound. There have been longer ones, and I expect we’ll see more.

Starting out

But the longer we invest in the UK stock market, the better and less volatile our returns are likely to be. At least, that’s what nearly 150 years of experience has shown us. It could change in the future, but I think it’s unlikely.

Going for a FTSE 100 ETF like the iShares one is, I think, a great approach for a new investor to consider.

It’s straightforward, and avoids all the research and head-scratching needed to dig out and buy our own individual shares.

Doing all that for me is part of the fun. But we can learn and do as much, or as little, as we want in our next ISA year. Or the one after that.

Alan Oscroft has no position in any of the shares 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

Businessman hand stacking money coins with virtual percentage icons
Investing Articles

£5,000 invested in Tesco shares 5 years ago is now worth this much…

Tesco share price growth has been just part of the total profit picture, but can our biggest supermarket handle the…

Read more »

Investing Articles

Here’s why I’m bullish on the FTSE 100 for 2026

There's every chance the FTSE 100 will set new record highs next year. In this article, our Foolish author takes…

Read more »

Thoughtful man using his phone while riding on a train and looking through the window
Growth Shares

UK interest rates fall again! Here’s why the Barclays share price could struggle

Jon Smith explains why the Bank of England's latest move today could spell trouble for the Barclays share price over…

Read more »

Man hanging in the balance over a log at seaside in Scotland
Investing Articles

2 out-of-favour FTSE 250 stocks set for a potential turnaround in 2026

These famous retail stocks from the FTSE 250 index have crashed in 2025. Here's why 2026 might turn out to…

Read more »

Young female business analyst looking at a graph chart while working from home
Investing Articles

Down over 30% this year, could these 3 UK shares bounce back in 2026?

Christopher Ruane digs into a trio of UK shares that have performed poorly this year in search of possible bargains…

Read more »

Mature people enjoying time together during road trip
Investing Articles

Yields up to 8.5%! Should I buy even more Legal & General, M&G and Phoenix shares?

Harvey Jones is getting a brilliant rate of dividend income from his Phoenix shares, and a surprising amount of capital…

Read more »

Light trails from traffic moving down The Mound in central Edinburgh, Scotland during December
Investing Articles

Up 7.5% in a week but with P/Es below 8! Are JD Sports Fashion and easyJet shares ready to take off?

easyJet shares have laboured in 2025, but suddenly they're flying. The same goes for JD Sports Fashion. Both still look…

Read more »

US Stock

I think this could be the best no-brainer S&P 500 purchase to consider for 2026

Jon Smith reveals a stock from the S&P 500 that he feels has the biggest potential to outperform the index,…

Read more »