I’d aim to turn a £20,000 ISA into £28,133 of passive income

Investing can certainly be daunting for those with no experience. So here’s how I’d invest £20,000 and aim for a substantial passive income.

| More on:

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 black colleagues high-fiving each other at work

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.

I’ve a little bit of money in an HSBC active savings account — the type you can withdraw from immediately — and, for the first time in 12 years, I’m actually getting some noteworthy interest. However, this isn’t going to last for long. With a couple over years, interest on this account will be close to zero. It’s not a long-term passive income option.

So what’s the alternative? Well, personally, I have the majority of my wealth in a Stocks and Shares ISA. Through this tax-efficient vehicle — I pay no tax on capital gains or dividends earned within the wrapper — I invest in stocks with the long-term objective of earning a passive income.

Time + contributions = growth

The reality is, that even with £20,000 invested in stocks, I’m not going to be able to generate a particularly large passive income. Taking 8% as the very best dividend yield achievable, I’d only be able to earn around £1,600 a year.

This is where time and regular contributions are phenomenally important. When we invest, and then reinvest our returns, we allow our money to grow. And the longer we leave it, the faster it grows because we start earning interest on our interest. As highlighted by the below, interest compounds.

Created at thecalculatorsite.com

Next, I’ve got to think about making regular contributions. This is another way to get my portfolio growing, even if it’s just £100 a month. Collectively, over time, reinvesting and making monthly contributions will see my portfolio grow significantly.

In fact, keeping the annual return/dividend at 8%, after 30 years, including a £100 monthly contribution, I’d have £390k! That could generate £28,133 of passive income in the 30th year.

The growth phase

I’ve used 8% as an example throughout because it happens to be a strong return for a novice investor. But it’s also, as mentioned, pretty much the best dividend yield I could receive right now when investing in a handful of stocks.

Personally, I’m looking to grow my portfolio faster than 8% annually. This involves investing in a diverse portfolio of stocks, many of which have great growth prospects and excellent metrics. In turn, that means I should have a large pot for generating passive income in the future.

One of these companies is Super Micro Computer (NASDAQ:SMCI). I’ve jumped in and out of this stock, but up 748% over the past 12 months — yes 748% — I think it’s still got further to go.

Super Micro is one of the enablers of the artificial intelligence (AI) revolution, providing high-performance, application-optimised server and storage solutions. These solutions, enhanced by proprietary-cooling technology, allow powerful semiconductors to work at peak efficiency.

Of course, there’s a risk other companies will enter the market. But, for the foreseeable future, Super Micro has the market cornered, while benefitting from key partnerships with Nvidia and AMD.

Looking at the metrics, the stock still looks undervalued. It has a price-to-earnings-to-growth ratio of 0.86. Anything under one infers a company is undervalued. And remember, this stock keeps on beating expectations.

Not every pick will be a winner, but the big winners certainly help my aggregated performance. In the last few months I’ve been fortunate with Super Micro, Nvidia, Rolls-Royce, GigaCloud, Powell Industries, Meta, and Celestica all up more than 30%.

Randi Zuckerberg, a former director of market development and spokeswoman for Facebook and sister to Meta Platforms CEO Mark Zuckerberg, is a member of The Motley Fool's board of directors. James Fox has positions in Celestica Inc, GigaCloud Technologies, Powell Industires, Nvidia, Meta Platforms and Rolls-Royce Plc. The Motley Fool UK has recommended Meta Platforms, Nvidia, and Rolls-Royce 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

Warren Buffett at a Berkshire Hathaway AGM
Investing Articles

Want to be a hit in the stock market? Here are 3 things super-successful investors do

Dreaming of strong performance when investing in the stock market? Christopher Ruane shares a trio of approaches used by some…

Read more »

Two white male workmen working on site at an oil rig
Investing Articles

The BP share price has been on a roller coaster, but where will it go next?

Analysts remain upbeat about 2026 prospects for the BP share price, even as an oil glut threatens and the price…

Read more »

Investing Articles

Prediction: move over Rolls-Royce, the BAE share price could climb another 45% in 2026

The BAE Systems share price has had a cracking run in 2025, but might the optimism be starting to slip…

Read more »

Tesla car at super charger station
Investing Articles

Will 2026 be make-or-break for the Tesla share price?

So what about the Tesla share price: does it indicate a long-term must-buy tech marvel, or a money pit for…

Read more »

Portrait of elderly man wearing white denim shirt and glasses looking up with hand on chin. Thoughtful senior entrepreneur, studio shot against grey background.
Investing Articles

Apple CEO Tim Cook just put $3m into this S&P 500 stock! Time to buy?

One household-name S&P 500 stock has crashed 65% inside five years. Yet Apple's billionaire CEO sees value and has been…

Read more »

Dividend Shares

How much do you need in an ISA to make £1,000 of passive income in 2026?

Jon Smith looks at how an investor could go from a standing start to generating £1,000 in passive income for…

Read more »

Investing Articles

Can the Lloyds share price hit £1.30 in 2026?

Can the Lloyds share price reproduce its 2025 performance in the year ahead? Stephen Wright thinks investors shouldn’t be too…

Read more »

Young woman working at modern office. Technical price graph and indicator, red and green candlestick chart and stock trading computer screen background.
Investing Articles

Down 45%, is it time to consider buying shares in this dominant tech company?

In today’s stock market, it’s worth looking for opportunities to buy shares created by investors being more confident about AI…

Read more »