I’d invest £300 each month to target a £20,000 second income

By putting aside a few hundred pounds each month, our writer thinks he can build a sizeable second income. Here’s how he’d go about it.

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.

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.

Close-up of British bank notes

Image source: Getty Images

No matter how hard one works, there are only so many hours in the day. That is not about to change! That helps explain why many people aim to build a second income by doing something other than taking on an additional job.

My own approach is to build a portfolio of shares that pay me dividends that I can then invest in buying more shares. Over time, I reckon that can help me build a substantial additional income stream.

I do not need any money to begin, as I can put a regular saving programme in place and use that to start buying shares.

As an example, here is how I could target a £20,000 annual second income by investing £300 each month.

Getting into the habit

I do not have to go for £300 each month. The same approach could work with £1,000 each month or £50. Although the speed at which I hit my target would change accordingly, the basic principles apply no matter how much I invest.

I would invest a regular amount based on what suits my own financial circumstances. I would put the money into a share-dealing account or Stocks and Shares ISA. By doing so on a regular basis, hopefully I could get into an investment habit that may last for decades and help me build wealth.

Buying dividend shares

Simply having money in an investment account is not going to generate the second income I am aiming for. Instead, I would invest it in shares I think can pay me dividends in future.

In doing so, I would follow four key rules.

Four investment rules

First, I would only invest in businesses I understand. That is important because it gives me the ability to assess the prospects for the companies in which I invest.

Secondly, I would only buy shares I thought had the potential to pay sizeable dividends for a long time to come. Past performance does not necessarily indicate what will happen next. So I look for businesses with a competitive advantage in an area in which I expect to see long-term customer demand, such as Unilever or National Grid.

Thirdly, like any investor I might get things wrong. A company can be blindsided by some unforeseen event, leading to it cancelling dividends. So I always diversify across a range of companies.

And I pay attention to the price I pay for shares. If I overpay, then even if I earn juicy dividends, I could end up losing money from my investment.

Hitting my second income target

Taking that approach, I could hopefully start to earn dividends.

Rather than using them as extra income immediately, I would reinvest them so they could start earning dividends themselves. That is known as compounding and could help me reach my target faster.

If I can earn an overall average compound growth rate on my whole portfolio of 5%, investing £300 each month should earn me a £20,000 annual dividend income after 39 years.

That may sound like a long time to wait. But I could also decide not to compound and simply take the dividends as cash when they are paid. That way, hopefully, I would grow my second income in coming years.

C Ruane has no position in any of the shares mentioned. The Motley Fool UK has recommended Unilever Plc. 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

Mature black woman at home texting on her cell phone while sitting on the couch
Investing Articles

Down 32% and with a P/E of 9.5, is this FTSE 250 share too cheap to ignore?

This FTSE 250 share is in freefall after slashing guidance for this financial year. But Royston Wild eyes a potential…

Read more »

Chalkboard representation of risk versus reward on a pair of scales
Growth Shares

Why high oil prices could be good news for Lloyds shares

Jon Smith talks through the implications of elevated oil prices and translates that through to the potential impact on Lloyds'…

Read more »

Investing Articles

Lists of income stocks to buy almost never include this one — but with a forecast 8.2% yield, I think they should!

This FTSE firm, not always seen as an income play, has a forecast yield of 8.2%, underlining why it's one…

Read more »

Person holding magnifying glass over important document, reading the small print
Investing Articles

Aviva’s share price is down 13% to under £7, despite outstanding 2025 results! Time for me to buy more?

I think Aviva’s share price reflects an outdated view of the business, and that gap between perception and reality is…

Read more »

Arrow symbol glowing amid black arrow symbols on black background.
Investing Articles

Shell’s £33+ share price is near an all-time high, so why am I going to buy more as soon as possible?

Shell's strong cash generation and improving growth drivers contrast with a share price well below my valuation, suggesting major long‑term…

Read more »

DIVIDEND YIELD text written on a notebook with chart
Investing Articles

An 8.4% forecast yield but down 16%! Time for me to buy more of this FTSE 100 passive income star?

This FTSE 100 passive‑income machine is delivering rising payouts and strong forecasts, and its share price suggests the market hasn’t…

Read more »

CEO Mark Zuckerberg at F8 2019 event
Investing Articles

£10,000 invested in Meta Platforms Stock 5 years ago is now worth…

Meta Platforms has been throwing good money after bad at Reality Labs since 2021, but the stock has more than…

Read more »

Middle-aged white man pulling an aggrieved face while looking at a screen
Investing Articles

£7,500 invested in Diageo shares 5 weeks ago is now worth…

Our writer wonders if Diageo shares are worth a look at a 14-year low, or whether this FTSE 100 spirits…

Read more »