How much do you need in an ISA to target a £1,000 monthly passive income?

Discover how UK investors can target a large passive income in an ISA — and one FTSE 100 growth share that’s crushed the market.

| 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.

A senior man and his wife holding hands walking up a hill on a footpath looking away from the camera at the view. The fishing village of Polperro is behind them.

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.

Building passive income with an ISA can be a powerful way to secure financial freedom in retirement. Rising living and social care costs mean many pensioners are feeling the financial squeeze. But by investing in a Stocks and Shares ISA, many thousands of people have managed to achieve a quality standard of living in later life.

Individuals can choose to save or invest in a Cash ISA, a Stocks and Shares ISA, or a Lifetime ISA. However, the greater annual allowance and stronger long-term returns mean that the investing ISA has proved the most effective choice for building wealth.

Annual returns here have averaged 9.6% over the last decade. With the Cash ISA, this sits way back at 1.2%, according to Moneyfacts.

Using an ISA to buy shares, trusts and funds involves greater risk. But it also provides a formidable chance to build a £1,000 second income in retirement

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.

Growth AND income

Of the many ways you can aim for a large passive income, investing in dividend shares is one path to consider. It’s the strategy I plan to follow, as it can provide a steady income as well as room for further portfolio growth.

Let’s say I choose to buy 6%-yielding dividend shares once I hit retirement. To make a monthly income of £1,000 a month, my Stocks and Shares ISA will need to be worth £200,000 by then.

That’s not a small sum. But it’s also isn’t one that’s necessarily out of reach for most people, thanks to the long-term performance of the stock market and the tax benefits of the ISA.

If I can hit that 9.6% average annual return I mentioned above, as little as £162 a month (excluding trading fees) over 25 years would let me reach that magic £200,000 portfolio.

How to target a £1k passive income with a £200k portfolio
Source: thecalculatorsite.com

Targeting quality shares

Choosing individual shares can be the most effective way to target blockbuster returns through regular investing. This strategy can deliver index-beating returns, helping individuals perhaps double or triple their money, perhaps more.

Take Ashtead Group (LSE:AHT) as one to consider. Rapid expansion during the 21st century has transformed it into a powerhouse in the North American rental equipment sector. It’s benefitted from the strength of the US economy, and the ongoing shift from ownership to rental for construction and industrial hardware.

Revenues have grown from £1.6bn in 2014 to £8.7bn last year (based on average exchange rates). And pre-tax profits have swelled from £357m to £1.7bn. This has translated into an average annual return of 18.8%, taking into account share price gains and dividends.

This is an industry that’s faced challenges due to higher interest rates and trouble in key end markets. But the long-term outlook remains robust, helped by plans for massive infrastructure upgrades in the US. With the marketplace still highly fragmented, Ashtead has scope for further earnings-boosting acquisitions as well.

Not all stocks are equal, and a diversified portfolio could contain winners like this alongside some much poorer performers. But careful analysis to identify quality companies like Ashtead can set ISA investors up for retirement.

Royston Wild has positions in Ashtead Group Plc. The Motley Fool UK has recommended Ashtead Group 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

Can someone invest like Warren Buffett with a spare £500?

Christopher Ruane explains why an investor without the resources of billionaire Warren Buffett could still learn from his stock market…

Read more »

Investing Articles

Can these 2 incredible FTSE 250 dividend stocks fly even higher in 2026?

Mark Hartley examines the potential in two FTSE 250 shares that have had an excellent year and considers what 2026…

Read more »

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

Is 45 too late to start investing?

Investing at different life stages can come with its own challenges -- and rewards. Our writer considers why a 45-year-old…

Read more »

Hand of person putting wood cube block with word VALUE on wooden table
Investing Articles

UK shares look cheap — but the market might be about to take notice

UK shares have traded at a persistent discount to their US counterparts. This can create huge opportunities, but investors need…

Read more »

Investing Articles

This FTSE 100 growth machine is showing positive signs for a 2026 recovery

FTSE 100 distributor Bunzl is already the second-largest holding in Stephen Wright’s Stocks and Shares ISA. What should his next…

Read more »

Investing Articles

I asked ChatGPT for the best FTSE 100 stocks to buy for passive income in 2026 and it said…

Paul Summers wanted to learn which dividend stocks an AI bot thinks might be worth buying for 2026. Its response…

Read more »

ISA Individual Savings Account
Investing Articles

Stop missing out! A Stocks and Shares ISA could help you retire early

Investors who don't use a Stocks and Shares ISA get all the risks that come with investing but with less…

Read more »

Investing Articles

Will Greggs shares crash again in 2026?

After a horrible 2025, Paul Summers takes a look at whether Greggs shares could sink even further in price next…

Read more »