Share your opinion and earn yourself a free Motley Fool premium report!

We are looking for Fools to join a 75 minute online independent market research forum on 15th / 16th December.

To find out more and express your interest please click here

How much do you need in an ISA to target £4,000 in monthly passive income?

Millions of us invest for passive income. Dr James Fox details one stock that could one day help him earn a significant income from his investments.

| 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.

Businessman with tablet, waiting at the train station platform

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.

Many investors dream of generating enough passive income to cover living costs or more. A monthly income of £4,000 — or £48,000 a year — might seem ambitious, but it’s entirely possible with a disciplined long-term approach and, importantly, the power of compounding inside a Stocks and Shares ISA.

To begin, let’s get the numbers straight. To sustainably draw £48,000 annually from investments yielding 5% would need a portfolio worth around £960,000. While that’s a substantial figure, it can be achieved by steadily investing over time — and reinvesting dividends along the way.

Let’s assume an investor is starting with £20,000, and they decide they’re going to contribute £500 monthly in order to help the portfolio grow. Now assuming a 10% annualised growth rate, that portfolio could hit £1m in 26 years.

Of course, 10% might sound like overly strong growth, but it’s achievable. However, investors should be wary that poor investment decisions typically result in losing money. An investor may be able to reach that £1m mark sooner by contributing more to their portfolio, even with a more conservative targeted growth rate.

Making it work

Naturally, the required capital depends on the yield. Higher-yielding investments may reduce the capital needed, but they often come with more risk. A portfolio yielding 6% would need around £800,000 to generate £48,000 annually. However, total return and capital preservation should always be prioritised over yield alone.

Diversification’s also key. The FTSE 100 offers a host of strong dividend paying stocks, but investors should consider various income opportunities when they’re looking to withdraw a passive income from their portfolio. This includes exploring various geographies, not just the UK.

What’s more, doing this through a Stocks and Shares ISA means everything is shielded from taxation. No tax on capital gains and no tax on income.

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.

Investing for growth

Most of us aren’t going to be anywhere near having £1m in our ISAs. So how do we get there? Well, a popular strategy would be to start investing in one or two handpicked stocks each month. This approach strives for diversification but gives investors a chance to beat the market.

Melrose Industries (LSE:MRO) looks like a stock with real potential and worthy of consideration. It’s a supplier in the aerospace industry, with sole source positions on 70% of its sales.

The company doesn’t usually make headlines, but that’s part of the appeal. It’s steadily growing its high-margin aftermarket revenues, and it’s benefiting from many of the supportive trends that have taken Rolls-Royce shares higher in recent years.

The shares are trading much cheaper than giants like Rolls-Royce and GE, even though Melrose’s management expects its earnings to grow at 20% annualised growth in the years through to 2029.

However, challenges remain, including supply chain issues and some hefty net debt. But with a strong business model and clear economic moat, this is a stock that deserves a close look for anyone interested in steady, long-term growth. It’s now my largest holding.

James Fox has positions in Melrose Industries Plc and Rolls-Royce Plc. The Motley Fool UK has recommended Melrose Industries Plc 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

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

Here’s how much passive income someone could earn maxing out their ISA allowance for 5 years

Christopher Ruane considers how someone might spend a few years building up their Stocks and Shares ISA to try and…

Read more »

Man putting his card into an ATM machine while his son sits in a stroller beside him.
Investing Articles

Was I wrong about Barclays shares, up 196%?

Our writer has watched Barclays shares nearly triple in five years, but stayed on the sidelines. Is he now ready…

Read more »

Wall Street sign in New York City
Investing Articles

Up 17% in 2025, can the S&P 500 power on into 2026?

Why has the S&P 500 done so well this year against a backdrop of multiple challenges? Our writer explains --…

Read more »

National Grid engineers at a substation
Investing Articles

National Grid shares are up 19% in 2025. Why?

National Grid shares have risen by almost a fifth this year. So much for it being a sleepy utility! Should…

Read more »

Road 2025 to 2032 new year direction concept
Investing Articles

Here are the potential dividend earnings from buying 1,000 Aviva shares for the next decade

Aviva has a juicy dividend -- but what might come next? Our writer digs into what the coming decade could…

Read more »

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

Just released: our top 3 small-cap stocks to consider buying in December [PREMIUM PICKS]

Small-cap shares tend to be more volatile than larger companies, so we suggest investors should look to build up a…

Read more »

This way, That way, The other way - pointing in different directions
Investing Articles

Is the unloved Aston Martin share price about to do a Rolls-Royce?

The Aston Martin share price has inflicted a world of pain on Harvey Jones, but he isn't giving up hope…

Read more »

Surprised Black girl holding teddy bear toy on Christmas
Investing Articles

How much do you need in a Stocks and Shares ISA to raise 1.7 children?

After discovering the cost of raising a child, James Beard explains why he thinks a Stocks and Shares ISA is…

Read more »