How much should a 40-year-old put in an ISA to earn monthly passive income of £1k by retirement?

Mark Hartley considers how much someone should invest in an ISA every month to secure a decent passive income stream before retiring.

| 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.

Senior couple are walking their dog through a public park in Autumn.

Image source: Getty Images

I remember when I turned 40, the concept of retirement suddenly became all the more real. I had a pension, but I hadn’t planned much else and felt the need to secure a passive income stream.

Was I too late to start? Even though I still had 25 years to build my strategy, I was worried it might not be enough. However, that’s not necessarily the case. Here’s a plan that a 40-year-old investor may want to consider with the aim to secure a more comfortable retirement.

The target: £12,000 a year

Dividend stocks are usually the go-to option for income investors, paying out regular income on a quarterly, semi-annual, or annual basis.

To secure £1k a month, the annual dividends would need to amount to £12k.  Assuming an achievable average dividend yield of 6%, the required portfolio size would be £200,000.

To work out how much a 40-year-old would need to invest each month to build a £200,000 portfolio by age 65, we can use compound growth assumptions. Assuming a conservative average annual return of 8% (including capital growth and reinvested dividends), the investor would need to contribute around £210 a month.

It’s worth taking into account that with inflation, £1k in 25 years’ time may not be worth much. It would be wise to increase the monthly contributions each year to match inflation.

A portfolio strategy

First, investing via a Stocks and Shares ISA will help reduce tax obligations. It allows a UK resident to invest £20k worth of stocks a year with no tax charged on the capital gains.

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.

To secure the required growth and stability, a mix of stocks is best practice. Initially, it would be wise to include mostly growth stocks and defensive stocks. After retirement, this can be shifted towards high-yield dividend stocks.

It may even be worth considering a diversified fund like F&C Investment Trust (LSE: FCIT). It’s been going since 1868 and has enjoyed annualised growth of 7% a year for the past three decades. Although its yield’s low at only 1.5%, it’s grown consecutively for 50 years. This shows a consistent and reliable commitment to shareholder returns. 

Extensive diversification

The trust’s portfolio is highly diversified, including both public and private companies spread across several sectors and regions. However, it’s top holdings lean strongly towards US tech stocks such as Nvidia, Microsoft, Apple, Amazon and Meta. This puts it at risk from a downturn in this area — as shown by an 8.3% decline this past month due to US trade tensions.

Global diversification also adds a risk of currency devaluations, which can impact overall returns.

However, only 58.9% of the portfolio is based in North America, with 14.1% in Asia and 9.3% in Europe. Sector-wise, it’s 22.6% focused on Technology, 14% in Financial Services and 10.9% in Consumer Cyclical. The rest is spread over Industrials, Healthcare, Energy and other sectors.

Overall, F&C’s both a stock worth considering for an ISA and a good example of how to diversify a portfolio for stable growth. 

John Mackey, former CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool’s board of directors. 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. Mark Hartley has no position in any of the shares mentioned. The Motley Fool UK has recommended Amazon, Apple, Meta Platforms, Microsoft, and Nvidia. 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
Growth Shares

What are the best growth shares to try and double your money?

Jon Smith points out several key characteristics of growth shares to differentiate the good from the bad, and highlights one…

Read more »

Young mixed-race woman jumping for joy in a park with confetti falling around her
Investing Articles

I asked ChatGPT for the best FTSE 100 stock for total returns in 2026, and guess what it said…

Are AI chatbots any better than humans at digging out the best value FTSE 100 stocks to consider buying? They…

Read more »

UK money in a Jar on a background
Investing Articles

How much should someone invest to target a £100 weekly second income?

Bringing in a second income can spell the difference between comfort or crisis when an emergency happens. Mark Hartley breaks…

Read more »

Emma Raducanu for Vodafone billboard animation at Piccadilly Circus, London
Investing Articles

Is now the time to consider buying Vodafone shares?

Vodafone shares have been on a roll, transforming a £5,000 investment 12 months ago into £8,455 today. But is the…

Read more »

Female Tesco employee holding produce crate
Investing Articles

Is now the time to consider buying Tesco shares?

Tesco shares have been a stellar performer over the last 12 months, but can this momentum continue? Or is it…

Read more »

Finger clicking a button marked 'Buy' on a keyboard
Investing Articles

Is this the perfect time to consider buying Legal & General shares?

Legal & General shares have one of the FTSE 100's biggest forecast dividend yields for 2026. Maybe we should think…

Read more »

Passive income text with pin graph chart on business table
Investing Articles

These are the FTSE 100’s 5 biggest passive-income streams!

These five FTSE 100 firms are expected to pay out £30.5bn in cash dividends in 2026. I'm a huge fan…

Read more »

Investing Articles

Up 50% in a year! Now check out the intriguing BP share price forecast for the next 12 months

The BP share price is up one day, down the next, as geopolitical uncertainty rattles the FTSE 100. Harvey Jones…

Read more »