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

£100k in savings? Here’s how that could be a starting point for £10k of monthly passive income

Millions of Britons invest for a passive income. Dr James Fox suggests a formula to try and turn a significant pot into a life-changing 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.

Pakistani multi generation family sitting around a table in a garden in Middlesbourgh, North East of England.

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.

Earning passive income through investing is an achievable goal, especially when starting with £100,000 — enough for a large house deposit.

While this amount might not create instant passive income wealth, it serves as a strong foundation to build a steady income stream over time. The key lies in starting smart, staying consistent, and allowing time and compounding to work their magic.

With £100k, a variety of investment options can generate passive income. Dividend-paying stocks provide regular payouts, while bonds offer stable interest payments. Real estate investments, whether through rental properties or REITs, can deliver consistent cash flow. Index funds, with their low fees and steady growth, also present a reliable way to grow wealth.

The secret to success involves reinvesting earnings early on. By investing in growth, redirecting dividends, interest, or rental income back into the portfolio, growth accelerates. Over time, this compounding effect can transform £100k into a much larger sum, significantly increasing passive income potential.

Using an ISA to compound wealth

The Stocks and Shares ISA is an excellent vehicle for building wealth. That’s because income and gains from investments within the ISA are shielded from UK taxes, including income tax and capital gains tax. In other words, if an investors sells a stock that’s surged 100%, they keep all the profits. This allows investments to compound much faster.

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.

In short, £100,000 could compound into something much larger over the long run when invested wisely. Combined with £200 of monthly contributions and 10% annualised growth, £100,000 could become £2.4m in 30 years. Assuming a withdrawal rate around 5%, this pot could generate around £10,000 a month.

An investments for the job?

Investors favouring a more hands-off approach may turn to a trust for diversification, and The Monks Investment Trust‘s (LSE:MNKS) certainly an interesting prospect to consider with its focus on global equity investments aimed at delivering above-average long-term returns.

Managed by Baillie Gifford — which also runs the popular Scottish Mortgage Investment Trust — the trust employs a patient, active management strategy, targeting companies that address crises innovatively to reduce costs or improve service quality.

The trust’s portfolio is diversified across regions, including North America (62%), Europe (14.5%), and the UK (3.3%), and sectors such as technology, healthcare, and consumer goods. And with a low ongoing charge of 0.44% and no performance fees, it offers cost efficiency.

Over the past decade, Monks has delivered strong performance, with a 246.2% share price growth, reflecting its ability to weather market volatility while focusing on capital growth. This also reflects the strong performance of tech stocks over the period.

Source: The Monks Investment Trust

Understandably, some investors may be concerned about its weighting towards big tech, which has underperformed over the past month and has plenty of company-specific risk. Yet the trust’s portfolio is balanced, offering a low-maintenance option with a proven track record.

James Fox has positions in The Monks Investment Trust Plc and Scottish Mortgage Investment Trust Plc. The Motley Fool UK has no position in any of the shares mentioned. 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 »