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.

A second income of £500 per month for £25 a week? Here’s how!

Christopher Ruane sets out a long-term approach to building a second income for himself that he thinks could prove lucrative.

Close-up of British bank notes

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.

Setting up additional income streams without having a second job could be a positive thing when it comes to personal finance. If I wanted to build a second income, I would aim to do so through investing in shares.

I think that could be lucrative: indeed, I think I might be able to hit a £500 monthly income target by investing £25 each week. But that is because, as a long-term investor, my timeframe stretches to decades not just years or months.

XXX

Even with a shorter timeframe, I think I could still aim to build up a more modest second income through this approach. Here’s how.

The basics

Shares are like a tiny sliver of a company. In this case I am not thinking about small companies like a local chemist or a car hire centre. Instead, my sights are set on the sorts of blue-chip businesses that sit in the benchmark FTSE 100 index of leading shares, or the smaller firms in the FTSE 250 index.

What I hope is that, by owning even a very minor piece of such firms, I can benefit from their business success when they pay out dividends.

I might make some bad choices or have unfortunate luck along the way, so I would invest in a range of companies to help reduce my risk.

As my focus in building a second income is dividends, I would also look not only for great businesses but for great businesses that look likely to share excess cash with shareholders.

Google parent Alphabet, for example, is massively profitable – but does not currently pay a dividend.

By contrast, Vodafone has a dividend yield of 9.6%. That means that, for every £100 I put into its shares today, I would hopefully earn £9.60 annually in dividends. That is, as long as the dividends stay at the current level (which is never guaranteed and one reason I am very careful when choosing the shares to buy).

Working towards a target

I could take any such dividends out as cash to give me a second income.

Imagine I earn an average yield of 8%. Investing £25 a week like that, I would already be earning £10 per week on average in dividends after five years.

But while that would be welcome, it is a long way off my second income target!

The power of compounding

That is why, taking the long-term view, I would compound my dividends. That simply means reinvesting them in buying more shares.

Imagine I put the same amount away each week in identical shares to my above example, but compounded the dividends. After five years, my portfolio would be worth £7,900 and would generate an annual second income of £632.

But what if I could manage a higher average dividend yield, of 10%?

In that case, after 18 years of investing £25 weekly, my Stocks and Shares ISA would be throwing off £500 per month on average in dividends.

Finding high-quality shares that yield 10% is not easy. It takes time, effort, and research. But if I could manage to do it, my second income goal could come closer into view!

Suzanne Frey, an executive at Alphabet, is a member of The Motley Fool’s board of directors. C Ruane has positions in Vodafone Group Public. The Motley Fool UK has recommended Alphabet and Vodafone Group Public. 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

Friends and sisters exploring the outdoors together in Cornwall. They are standing with their arms around each other at the coast.
Investing Articles

£503 buys 14 shares in this FTSE 250 stock that returned 23.9% annually for the last 15 years

This FTSE 250 stock has averaged a huge return for 15 years. At today's price, £503 buys 14 shares. But…

Read more »

Black woman using loudspeaker to be heard
Investing Articles

£1,000 buys 25 shares in this FTSE 100 stock that’s returned 29.2% annually for the last 10 years

This FTSE 100 mining stock has returned close to 30% a year for a decade. At 3,995p, £1,000 buys 25…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

Down 47%, is this growth stock finally worth buying in May?

With a £288m order book and a hidden pipeline of defence and nuclear contracts, is this growth stock now too…

Read more »

House models and one with REIT - standing for real estate investment trust - written on it.
Investing Articles

2 REITs yielding 7%+ to consider for passive income in 2026

A REIT backed by the NHS and another backed by Tesco and Sainsbury's with both yielding 7%+. Here's why I'm…

Read more »

Woman riding her old fashioned bicycle along the Beach Esplanade at Aberdeen, Scotland.
Investing Articles

Just 97 shares of this UK dividend stock generate £238 in passive income

A 5.7% yield, £238 in passive income from just 97 shares, and one of the most divisive dividend stocks on…

Read more »

ISA coins
Investing Articles

£10,000 in an ISA generates a second income of…

The London Stock Exchange is home to some of the world's most generous dividends. But how big a second income…

Read more »

Shot of a senior man drinking coffee and looking thoughtfully out of a window
Investing Articles

Expert recommendations: 2 top income stocks yielding 7%+!

With yields of 7.2% and 7.8% respectively, these two income stocks are catching the eyes of institutional analysts. Should investors…

Read more »

Illustration of flames over a black background
Investing Articles

3 top income-focused stocks to buy in May 2026, according to experts

Looking for a stock to buy for income in May 2026? Experts have flagged these three UK dividend shares as…

Read more »