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

DIVIDEND YIELD text written on a notebook with chart
Dividend Shares

How this stock market correction can help boost a second income by 25%

Jon Smith explains how rising dividend yields across some existing income shares can be seen as an opportunity to grow…

Read more »

Middle-aged Caucasian woman deep in thought while looking out of the window
Investing Articles

Considering a SIPP? Today’s market could provide an excellent opportunity to start

Mark Hartley breaks down the benefits of using a SIPP for retirement, and how current market conditions could offer a…

Read more »

Calendar showing the date of 5th April on desk in a house
Investing Articles

Looking for last-minute ISA ideas? Check out these UK stocks before April 3

Easter bank holidays mean the deadline to put cash into a Stocks and Shares ISA might be closer than UK…

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

£20k in a Stocks & Shares ISA? Here’s how to target a £3,854 monthly passive income

Royston Wild explains how Stocks and Shares ISA investors can target a huge passive income -- and reveals a top…

Read more »

piggy bank, searching with binoculars
Investing Articles

Stock market correction: time to create that £1,000-a-month passive income portfolio?

Millions of Britons invest for passive income. Dr James Fox believes they should always look to do so when others…

Read more »

Thoughtful man using his phone while riding on a train and looking through the window
Investing Articles

Correction territory: the FTSE 100’s best bargain right now could be…

The FTSE 100 has entered correction territory and that could mean it's a good opportunity to buy our favourite stocks…

Read more »

UK financial background: share prices and stock graph overlaid on an image of the Union Jack
Dividend Shares

1 extraordinary chance to buy this FTSE 100 share?

After the US attacked Iran, the FTSE 100 crashed 11.6% from its 2026 high before bouncing back. However, this major…

Read more »

Man writing 'now' having crossed out 'later', 'tomorrow' and 'next week'
Investing Articles

The best time to buy stocks? It might be right now

Short-term issues that delay long-term trends create opportunities to buy stocks. And that could be happening right now with a…

Read more »