We have some exciting news to share! The Motley Fool UK has now become The Twelfth Magpie -- an independent, UK-owned company, led by our long-serving UK management team — Mark Rogers, Chris Nials and Heather Adlington. In practical terms, it’s the same team you know, now fully focused on serving our UK readers and members.

Just as importantly, our approach remains unchanged: long-term, jargon-free, and on your side. This site is our new home, and there will be extra tweaks made across the coming few days as we settle in. So if anything looks a little off, please bear with us!

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.

How much passive income could someone earn by investing £100 a month in a Stocks and Shares ISA?

An ISA’s a great way of building a second income stream. James Beard looks at what could be achieved by an investor taking a long-term view.

| More on:
Night Takeoff Of The American Space Shuttle

Image source: Getty Images

You’re reading a free article with opinions that may differ from The Twelfth Magpie’s Premium Investing Services. Become a member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn more, and get a free 'Best Buy Now' stock!.

With an increasing number of providers, using a Stocks and Shares ISA to earn a second income is now easier than ever. And with the government cutting the amount that can be invested each year in a Cash ISA, now could be an ideal time for savers with a bit left over each month to consider investing in the stock market.

Here’s one possible approach.

Should you buy Legal & General Group Plc shares today?

Before you decide, please take a moment to review this report first. Despite ongoing uncertainties from US tariffs to global conflicts, Mark Rogers and his team believe many UK shares still trade at substantial discounts, offering savvy investors plenty of potential opportunities to learn about.

That’s why this could be an ideal time to secure this valuable research – Mark’s analysts have scoured the markets to reveal 5 of his favourite long-term ‘Buys’. Please, don’t make any big decisions before seeing them.

Keep on buying

My preferred method of earning passive income is to buy stocks that have a solid track record of paying above-average dividends. But instead of spending the money received on something non-essential, I reinvest the cash to buy yet more shares. Of course, there can never be any guarantees when it comes to investing but, if all goes to plan, the dividends received should increase each year.

This technique’s known as compounding. And by adopting this approach for several years – supplemented by a small monthly investment — it could be transformational. Let’s take a look at some examples.

A few numbers to ponder

The table below shows how much an ISA would be worth after investing £100 a month for either 20, 25 or 30 years, at various rates of return.

Years/Return5%6%7%8%
20 £40,745£45,564£51,040£57,266
25£58,812£67,958£78,746£91,483
30£81,869£97,925£117,606£141,761
Source: Hargreaves Lansdown’s regular investment calculator

Looking at the most favourable result, a £141,761 ISA could generate £11,341 in passive income each year from dividend shares yielding 8%. But is it possible to achieve a return like this? Personally, I think it is.

For example, the 10 highest-yielding shares on the FTSE 350 are currently (23 January) offering a return of 10.6%. Having said that, care needs to be exercised. A high yield could be too good to be true. In other words, a value trap.

One to consider

My favourite dividend share and one worth considering is Legal & General (LSE:LGEN). Based on amounts paid over the past 12 months, it’s presently yielding 8.3%.

The pensions and savings group’s generous payout’s particularly important because, over the past five years, its share price has done – literally – nothing. A £10,000 investment made in January 2021 would be worth the same today but, over the same period, an investor would have received an impressive 98.28p a share (£4,027) in dividends.

Dividend sustainability is an important consideration when deciding which shares to buy. History can help here, to some extent. Legal & General last cut its payout nearly 20 years ago, during the global financial crisis. It even managed to keep it unchanged at the height of the pandemic.

As for making future predictions, this is tricky. The directors have pledged to increase the 2025-2027 payout by 2% a year. This can only be achieved if earnings go in the right direction. Fortunately, analysts are forecasting some healthy earnings growth over the next three years.

Both dividend and earnings forecasts can be wrong but it feels to me as though the group’s operating in a sector that’s likely to grow over the coming decades. With the State Pension age increasing and more people being encouraged to save for their retirement, interest in private pensions is increasing.

Yes, this is making the industry more competitive which could pose a threat. And with its large exposure to bonds and equities, the group’s vulnerable to market volatility. However, with its healthy balance sheet and strong brand, I think Legal & General’s an excellent dividend share to consider for the long term.

James Beard has positions in Legal & General Group Plc. 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

Front view of a young couple walking down terraced Street in Whitley Bay in the north-east of England they are heading into the town centre and deciding which shops to go to they are also holding hands and carrying bags over their shoulders.
Investing Articles

How much is needed in an ISA for passive income that covers the UK’s monthly average rent of £1,381?

The UK’s monthly average rent for May 2026 is £1,381. Muhammad Cheema looks at how much is needed to aim…

Read more »

A rear view of a female in a bright yellow coat walking along the historic street known as The Shambles in York, UK which is a popular tourist destination in this Yorkshire city.
Investing Articles

How have BAE Systems shares become a dividend powerhouse? 5 reasons why!

Dividends on BAE Systems shares have risen every year without fail since the early 2000s. So what's the FTSE 100…

Read more »

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

Want to retire early? Here’s how a weak stock market could actually help

Christopher Ruane demonstrates with a real-world example how a tumbling stock market could potentially help someone who wants to retire…

Read more »

Tanker coming in to dock in calm waters and a clear sunset
Investing Articles

BP shares: still priced as an oil major — but the market may be behind the curve

Andrew Mackie looks at BP shares and why investors may be underestimating the quality and concentration of its underlying asset…

Read more »

A rear view of a female in a bright yellow coat walking along the historic street known as The Shambles in York, UK which is a popular tourist destination in this Yorkshire city.
Investing Articles

At 8.1%, are investors missing the bigger story behind Legal & General shares?

Andrew Mackie explores Legal & General shares and asks whether investors are still viewing it too narrowly as a yield…

Read more »

Young black female footballer training on stadium pitch
Investing Articles

How has this FTSE 250 share surged ANOTHER 7% today?

Applied Nutrition shares have soared on Monday after another brilliant trading update. So what's the FTSE 250 company's secret?

Read more »

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

The stock market game you’re actually playing (and why you might be losing)

Our writer recounts a painful experience of making a rash stock market decision based on emotions, not logic – and…

Read more »

Aerial shot showing an aircraft shadow flying over an idyllic beach
Investing Articles

Why is EasyJet stock suddenly a takeover target for US investors?

Andrew Mackie looks at easyjet shares jumping on US takeover talk — but is this a genuine re-rating or just…

Read more »