I’d use my £20k ISA to build a second income of £100 a month

I’m looking to build a second income stream to fund my retirement by investing in FTSE 100 dividend stocks. How much can I generate?

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.

Long-term vs short-term investing concept on a staircase

Image source: Getty Images

I think the best use of my Stocks and Shares ISA allowance is to generate a second income to secure myself a comfortable retirement.

I will do this by investing in the shares of individual FTSE 100 stocks, targeting those that pay some of the most generous yields. I will favour companies with a good track record of increasing shareholder payouts every year, as this should give me a rising income, over time.

I’m after top dividend stocks

Obviously, there are dangers to this strategy. Dividends are not guaranteed and can be cut if a company runs into trouble. I aim to get around this by investing in a minimum of 15 different shares, to spread my risk.

If I had £20,000 to invest in a Stocks and Shares ISA before the 5 April deadline, and was targeting a monthly income of £100 in year one, I would need to generate a yield of 6%.

I couldn’t do that by investing in a FTSE 100 tracker, because the index currently yields too little, at 4%. My £20,000 would only generate income of £800 a year, or £67 a month. 

That’s still a good return, especially since that income will rise over time. But I reckon I can do better today.

A quick glance at constituent members of the index shows that a string of stocks already yield more than 6%. I’m looking at fund manager abrdn (6.30%), insurer Aviva (6.47%), general insurer Admiral Group (7.44%), housebuilder Taylor Wimpey (7.96%), and telecoms giant Vodafone Group (7.98%).

Even better, these stocks operate across a range of different sectors, giving my £20,000 ISA portfolio instant balance. If I split my money equally between all five of them, investing £4,000 in each, I would easily hit my income target. A crude calculation suggests my yield would be 7.23%, giving me £1,446 annually, or £120 in monthly passive income.

I can beat my income target

I’m a bit wary about Vodafone, whose dividend is only covered 1.1 times by earnings, and I might substitute that with, say, fund manager M&G, which yields a stonking 8.34%. Before I buy any of these stocks, I will pore over their recent reports and trading statements to search for both opportunities and threats.

I’m particularly keen to check whether my stock picks will continue to generate sufficient cash to provide a smooth supply of growing dividends year after year.  

My 7% passive income target is only for the first year. As my chosen companies steadily hike their dividends (with luck), and I reinvest them back into my portfolio, both the capital value of my portfolio and the passive income stream it produces should rise over time. 

Retirement is still 15 years away. If my £20,000 ISA delivered a total average return of 7% a year, it would be worth a pretty decent £55,181 when I started to draw the dividends as income. If it still yields 7% at that point it will generate income of £3,863 a year, or £321 a month.

As ever, there are no guarantees, but I still think that’s a pretty good potential reward for one year’s worth of Stocks and Shares ISA investing.

Harvey Jones has no position in any of the shares mentioned. The Motley Fool UK has recommended Admiral Group Plc 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

Close-up of British bank notes
Investing Articles

£9,000 in savings? Here’s how to try and turn that into a £193 monthly second income

With a long-term approach and applying basic principles of good investment, our writer reckons someone with under £10k could earn…

Read more »

Investing Articles

A 2026 stock market crash could be a rare passive income opportunity

If a stock market crash comes our way then it might throw up plentiful opportunities for investors to secure a…

Read more »

Tesla car at super charger station
Investing Articles

£10,000 invested in Tesla stock 1 year ago is now worth…

Dr James Fox takes a closer look at Tesla stock with the incredibly volatile mega-cap company surging and pulling back…

Read more »

British pound data
Investing Articles

My personal warning for anyone tempted by the plunging Aston Martin share price

Harvey Jones was so captivated by the plunging Aston Martin share price that he ignored an old piece of investment…

Read more »

Stacks of coins
Investing Articles

This penny share just crashed 13% to 19p! Time to buy?

After another fall today, this penny stock has now crashed 70% since April 2021. Is it one that should be…

Read more »

Trader on video call from his home office
Investing Articles

Down 19%! Here’s why Barclays shares look a serious bargain to me right now

Barclays shares have slumped recently, but a big gap between price and fair value has opened, offering nimble long-term investors…

Read more »

CEO Mark Zuckerberg at F8 2019 event
Investing Articles

Why Meta Platforms shares fell 12.5% in March

Historically, investors have done well by buying Meta Platforms shares when the price has fallen. But is the latest legal…

Read more »

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

£20,000 invested in BAE Systems shares 4 years ago is now worth…

BAE Systems' shares have soared since 2022, yet rising NATO budgets are just starting to feed through, so the real…

Read more »