Stop saving and start investing! How the FTSE 100 could turn £100 per week into a £1m ISA

I think the FTSE 100 (INDEXFTSE:UKX) offers strong long-term growth potential.

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.

When investing, your capital is at risk. The value of your investments can go down as well as up and you may get back less than you put in.

Read More

The content of this article is provided for information purposes only and is not intended to be, nor does it constitute, any form of personal advice. Investments in a currency other than sterling are exposed to currency exchange risk. Currency exchange rates are constantly changing, which may affect the value of the investment in sterling terms. You could lose money in sterling even if the stock price rises in the currency of origin. Stocks listed on overseas exchanges may be subject to additional dealing and exchange rate charges, and may have other tax implications, and may not provide the same, or any, regulatory protection as in the UK.

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.

Investing £100 per week and ending up with a seven-figure portfolio may sound like a pipe dream to most people. However, it could be a much more attainable goal than it first seems due to the long-term growth potential of the FTSE 100.

By investing in a range of large-cap shares, holding them over the long run and reinvesting your dividends, you could end up with a £1m+ portfolio. By contrast, investing in a Cash ISA or savings account may mean that you experience disappointing returns that fail to improve your long-term financial situation.

FTSE 100 potential

The FTSE 100’s total annual returns since its inception 36 years ago have been around 9%. Assuming a similar rate of growth in future, a £100 investment in the index could be worth over £1m over a 34-year period. This assumes that dividends are reinvested, and that no capital is withdrawn from your portfolio.

With the FTSE 100 currently appearing to offer good value for money, its future returns could prove to be relatively impressive. For example, it has a dividend yield of 4.4%, which is above its long-term average, while major sectors such as resources, energy and financial services appear to offer many stocks that trade on low ratings compared to their historic averages. Over the long run, those valuations may revert towards their averages, which may lead to higher returns for investors in the FTSE 100.

Cash prospects

While the FTSE 100 could catalyse your portfolio’s performance, holding cash or investing in a Cash ISA may not. At the present time, savers may struggle to obtain an income return above 1.5%. Assuming such a rate of return over the same 34-year period discussed above, paying £100 per week into a savings account would lead to a total balance of £228,000.

Clearly, there is scope for interest rates to rise over the coming decades. But history shows that cash returns have lagged the stock market’s returns, due to the lower risk of cash, which may mean that a higher regular investment than £100 per week is required to generate a £1m+ portfolio.

Risk/reward

While the FTSE 100 is a riskier place to invest compared to cash, investors with a long-term outlook are likely to have sufficient time to enable their short-term paper losses to recover. This could mean that, while holding a modest amount of cash for emergencies is a sound move, focusing your capital on the FTSE 100 is a better idea when it comes to improving your long-term financial situation.

Of course, buying high-quality shares while they trade at low prices could enable you to beat the FTSE 100 and generate even higher returns. This could shorten the amount of time it takes to produce a £1m+ portfolio, and may lead to greater financial freedom in older age.  

Should you invest, the value of your investment may rise or fall and your capital is at risk. Before investing, your individual circumstances should be assessed. Consider taking independent financial advice.

Peter Stephens 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

Investing Articles

£3,000 in savings? Here’s how I’d use that to start earning a monthly passive income

Our writer digs into the details of how spending a few thousand pounds on dividend shares now could help him…

Read more »

Investing Articles

Here’s what dividend forecasts could do for the BP share price in the next three years

I can understand why the BP share price is low, as oil's increasingly seen as evil. But BP's a cash…

Read more »

Man writing 'now' having crossed out 'later', 'tomorrow' and 'next week'
Investing Articles

This FTSE 100 Dividend Aristocrat is on sale now

Stephen Wright thinks Croda International’s impressive dividend record means it could be the best FTSE 100 stock to add to…

Read more »

Investing Articles

3 shares I’d buy for passive income if I was retiring early

Roland Head profiles three FTSE 350 dividend shares he’d like to buy for their passive income to support an early…

Read more »

Investing Articles

Here’s how many Aviva shares I’d need for £1,000 a year in passive income

Our writer has been buying shares of this FTSE 100 insurer, but how many would he need to aim for…

Read more »

Female Doctor In White Coat Having Meeting With Woman Patient In Office
Investing Articles

1 incredible growth stock I can’t find on the FTSE 100

The FTSE 100 offers us a lot of interesting investment opportunities, but there's not much in the way of traditional…

Read more »

Mature Caucasian woman sat at a table with coffee and laptop while making notes on paper
Investing Articles

With an £8K lump sum, I could create an annual second income worth £5,347

This Fool explains how a second income is achievable by using a lump sum, investing in stocks, and the magic…

Read more »

Investing Articles

Here’s what dividend forecasts could do for the BT share price in the next 3 years

With the BT share price down so low, the dividend looks very nice indeed. The company's debt is off-putting, though.…

Read more »