How I’d invest £300 each month in shares to target lifelong passive income

Our writer thinks buying dividend shares could help him set up passive income streams for the coming decades.

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 mixed-race woman looking out of the window with a look of consternation on her face

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 money without having to work for it is appealing. But a lot of people dream about passive income without ever making a move to turn the aspiration into reality.

One of my favourite passive income ideas is investing money in dividend shares. Here is how I would use £300 a month to do that.

The power of regular saving

Some passive income ideas require a lot of money upfront, like a deposit for buying a rental property. I like investing in shares partly because that is not necessary. In fact, I can start with very little money. By putting aside what I can afford on a regular basis, I should soon start to build up funds I can use to purchase shares.

But other spending priorities often pop up in life. That could derail my plan. So I would discipline myself to set aside the same amount each month, on a regular basis. My goal of £300 is substantial – it would give me £3,600 each year to invest in shares.

Dividend shares as passive income ideas

So, in practice how would that £3,600 help me to earn money?

Many shares pay out dividends, which are basically a tiny sliver of their profits. So if I owned those shares, I ought to earn such dividends. As they are never guaranteed, I would spread my funds over a range of shares. Owning shares in other companies could reduce the overall impact on my income streams if one unexpectedly cut its dividend.

How much might I earn? That will depend on what is known as the dividend yield of the shares I buy. Basically, that is the dividend expressed as a percentage of what I pay for the shares. So if I invest £3,600 into shares with an average dividend of 5%, I would hopefully earn £180 in a year.

Once I own shares, I get any dividends they pay until I sell them. So, over time, my income ought to grow. Not only would I get dividends from shares I had recently purchased, I should also receive them from shares I bought in previous years. With a broad portfolio of dividend shares, I think I could realistically target earning passive income for life.

How to find shares to buy

At the core of this plan is finding shares to buy that will pay me dividends in future. But that requires judgment as nobody really knows what will happen in future. For example, miner Rio Tinto has a 12% dividend yield right now. But if metal prices fall and Rio Tinto’s profit declines, will that still be the case next year, or the year after that?

To manage this uncertainty, I try to buy shares in companies that have a competitive advantage in a market I expect to keep seeing strong demand. I also like companies that live within their means. Very high debt can mean that even a profitable firm has little spare cash to pay dividends after servicing its borrowings.

I think I can find such companies for my income portfolio, as long as I am not greedy and instead focus on searching for businesses with strong financial prospects.

Christopher Ruane 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

Yellow number one sitting on blue background
Investing Articles

I asked ChatGPT to pick 1 growth stock to put 100% of my money into, and it chose…

Betting everything on a single growth stock carries massive danger, but in this thought experiment, ChatGPT endorsed a FTSE 250…

Read more »

Portrait of pensive bearded senior looking on screen of laptop sitting at table with coffee cup.
Investing Articles

How little is £1,000 invested in Diageo shares at the start of 2025 worth now?

Paul Summers takes a closer look at just how bad 2025 has been for holders of Diageo's shares. Will things…

Read more »

Aston Martin DBX - rear pic of trunk
Investing Articles

After a terrible 2025, can the Aston Martin share price bounce back?

The Aston Martin share price has shed 41% of its value in 2025. Could the coming year offer any glimmer…

Read more »

Close-up of British bank notes
Investing Articles

How much do you need in an ISA to target £3,000 per month in passive income?

Ever thought of using an ISA to try and build monthly passive income streams in four figures? Christopher Ruane explains…

Read more »

piggy bank, searching with binoculars
Investing Articles

Want to aim for a million with a spare £500 per month? Here’s how!

Have you ever wondered whether it is possible for a stock market novice to aim for a million? Our writer…

Read more »

Investing Articles

Want to start buying shares next week with £200 or £300? Here’s how!

Ever thought of becoming a stock market investor? Christopher Ruane explains how someone could start buying shares even on a…

Read more »

Rear view image depicting a senior man in his 70s sitting on a bench leading down to the iconic Seven Sisters cliffs on the coastline of East Sussex, UK. The man is wearing casual clothing - blue denim jeans, a red checked shirt, navy blue gilet. The man is having a rest from hiking and his hiking pole is leaning up against the bench.
Investing Articles

2 ideas for a SIPP or ISA in 2026

Looking for stocks for an ISA or SIPP portfolio? Our writer thinks a FTSE 100 defence giant and fallen pharma…

Read more »

Midnight is celebrated along the River Thames in London with a spectacular and colourful firework display.
Investing Articles

Could buying this stock at $13 be like investing in Tesla in 2011?

Tesla stock went on to make early investors a literal fortune. Our writer sees some interesting similarities with this eVTOL…

Read more »