Here’s how you could reduce working hours by building a second income portfolio

Dr James Fox explains how someone could prepare themselves for an early semi-retirement by investing heavily in a Stocks and Shares ISA.

| 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.

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.

A close up side view of a father and his young daughter who is a wheelchair user having a cute affectionate moment with each other whilst on a family day out in a beautiful public park in Newcastle upon Tyne in the North East of England.

Image source: Getty Images

I thought I knew it all when it came to financial strategies, but one idea caught my eye this week, and I don’t think I’d given it much consideration before. The strategy revolves around investing heavily in our early working years to build a sizeable second income portfolio. However, instead of taking that second income, the investor could simply stop contributing to it.

Let me explain in more detail. Imagine an investor opens a Stocks and Shares ISA at 20 and commits to putting away £1,000 per month. That might sound like a lot, but where there’s a will, there a way. I’ve worked with lots of young people who live at home with their parents and spend all their money on having a good time. There’s nothing wrong with that, but putting into the stock market could be life changing.

So, what happened when someone puts £1,000 a month into the stock market for 20 years? Well, if the investor were to average 10% annualised returns — this is below the average return of the S&P 500 but would still reflect a strong return for novice investors — they’d have £759,000 after 20 years.

Source: thecalculatorsite.com — Age 20-40

This could generate around £33,000 per annum assuming an average dividend yield of 5%. That could allow the investor to work less and move towards a position of semi-retirement at just 40 years old. And it would be tax-free income as it’s from an ISA.

Please note that tax treatment depends on the individual circumstances of each client and may be subject to change in future. The content in this article is provided for information purposes only. It is not intended to be, neither does it constitute, any form of tax advice. Readers are responsible for carrying out their own due diligence and for obtaining professional advice before making any investment decisions.

Or, the investor could simply stop contributing. That would save them £1,000 per month, and it would allow the ISA to continue growing. In turn, this could allow the investor to reduce their working hours.

But what would happen to the ISA after the monthly contributions end? Well, with a sizeable principle, it would do just fine. Assuming no additional contributions, it would continue rising to £3.3m after another 15 years and £5.5m after 20 years. That’s compounding.

Source: thecalculatorsite.com — Age 40-60

Where to invest for outsized returns?

Novice investors may find it hard to beat the market — grow their portfolio’s faster than the market average. As such, they may wish to invest in trusts or funds, or maybe really focus on making informed stock picks.

Scottish Mortgage Investment Trust (LSE:SMT) is a key part of my portfolio. It’s not because I don’t back myself to beat the market, but it’s a sensible option for a certain degree of diversification.

The investment trust has a significant focus on technologies and transformative industries, investing in companies like SpaceX, MercadoLibre, and Meta. The technology-oriented investments are typically more volatile, and privately listed companies (there are a fair few in the portfolio) aren’t as easy to value. That’s a risk.

However, it’s generally a very attractive portfolio. The share price is up tenfold over the past 15 years and that’s driven by management’s desire to find the next bigger winners over and over again.

It’s probably the holding I tamper with the least in my portfolio, only adding to it on occasion. I certainly believe it deserves more consideration, especially with the current net asset value discount.

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 Scottish Mortgage Investment Trust Plc. The Motley Fool UK has recommended MercadoLibre, and Meta Platforms. 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

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 »

Queen Street, one of Cardiff's main shopping streets, busy with Saturday shoppers.
Investing Articles

Here’s why Next stock rose 5% and topped the FTSE 100 today

Next was the leading FTSE 100 stock today, rising 5%. Our writer takes a look at why and asks if…

Read more »

Renewable energies concept collage
Investing Articles

Up 458% in a year, could the Ceres Power share price go even higher?

Christopher Ruane reviews some highs and lows of the Ceres Power share price over the years and wonders whether the…

Read more »

Rolls-Royce's Pearl 10X engine series
Investing Articles

Are the glory days over for Rolls-Royce shares?

Rolls-Royce shares have soared in recent years. Lately, though, they have taken a tumble. Could there be worse still to…

Read more »

Group of friends meet up in a pub
Investing Articles

Are ‘66% off’ Diageo shares a once-in-a-decade opportunity?

Diageo shares have taken another hit in the early weeks of 2026. Are we looking at a massive bargain or…

Read more »

Investing Articles

Meet the UK stock under £1.50 smashing Rolls-Royce shares over the past year

While Rolls-Royce shares get all the attention, this under-the-radar trust has quietly made investors a fortune. But is it still…

Read more »

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

Down 19%, the red lights are flashing for Barclays shares!

Barclays shares have fallen almost a fifth in value as the Middle East war has intensified. Royston Wild argues that…

Read more »

Aviva logo on glass meeting room door
Investing Articles

After falling another 5%, are Aviva shares too cheap to ignore?

£10,000 invested in Aviva shares five years ago would have grown 50% by now. But what might the future hold,…

Read more »