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 I’d invest £100 a month in UK shares to build a £5,000 second annual income

By saving and investing in UK shares regularly, our writer thinks he could supplement his main income. Here is how he would go about it.

Young female analyst working at her desk in the office

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.

The idea of earning some extra money without working for it has appeal. That is one of the attractions for me of buying UK shares. If they pay dividends, I can put money into them today and hopefully set up second income sources for years to come.

I do not even need to start with a lot of money. Here is how I would go about putting £100 to work each month with the long-term goal of generating £5,000 in passive income annually.

XXX

How dividend shares work

The theory of trying to build a second income by investing in dividend shares is pretty straightforward.

When a company makes a profit, it can do different things with it. For example, it might fund expansion into a new market or developing new technology. But it could also distribute the profit among shareholders. That is basically what dividends are.

Dividends are never guaranteed, even when a company is highly profitable. Google parent Alphabet is an example — it has never paid a dividend despite mammoth earnings. So if I wanted to build a second income, I would look for shares in companies I hoped would be likely to pay dividends in future. So I would look for firms I felt had an enduring competitive advantage in a market with robust customer demand.

Saving to invest

By putting aside a certain amount on a regular basis, I can build up funds to invest.

For example, imagine I put £100 each month into a share-dealing account. That would add up to £1,200 a year that I could invest in dividend shares.

The amount I might earn would depend on what is known as the dividend yield of the shares I bought. If a share costs a pound and pays out 6p per year in dividends, for example, we say that it has a yield of 6%. A number of UK shares in my portfolio currently have a yield even higher than that.

So if I invested £1,200 at a dividend yield of 6%, I would hopefully earn £72 per year. That would certainly be welcome – but it is a long way off my £5,000 target. I could try and build up to that over time, though, by continuing to put aside my monthly £100 and also reinvesting the dividends. That is known as compounding.

Doing that, after 28 years I ought to own shares worth around £84,500 and generating a bit over £5,000 in dividends per year. That example presumes constant share prices and dividend yields. But it shows how regularly saving to invest in dividend shares could help me build a meaningful second income over the long term.

Finding UK shares to buy

I could start today, putting aside money regularly and buying UK shares. If I was a beginner, I would take time to learn how the stock market works, before hunting for shares that meet my criteria.

Then, hopefully, those shares could help me grow my income streams year on year.

Suzanne Frey, an executive at Alphabet, is a member of The Motley Fool’s board of directors. C Ruane has no position in any of the shares mentioned. The Motley Fool UK has recommended Alphabet (A shares) and Alphabet (C shares). 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 »