How much do you need in an ISA to target £8,333 a month of passive income?

Our writer explores a potential route to earning double what is today considered a comfortable retirement and all tax-free inside an ISA.

| More on:
Female student sitting at the steps and using laptop

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.

A monthly income of £8,333 from dividends in a Stocks and Shares ISA would be a dream come true for many. Even in future, it would likely provide most with a more comfortable existence, especially if it’s supplemented other forms of income.

To put £8,333 a month into perspective, we’re talking about an annual tax-free income of £100,000. And according to the latest Retirement Living Standards (based on independent research by Loughborough University), this would be more than double what it officially defines as a ‘comfortable’ retirement for one person.

But how big would the ISA need to be to generate this level of income?

The miracle of compounding

The bad news is that the portfolio would need to be worth roughly £1.43m, assuming a 7% dividend yield. That’s not the sort of money that can be rustled up overnight or found down the back of the sofa.

The good news, though, is that it can be built over a long period of time. That’s especially so if some powerful methods are used along the way.

One is reinvesting dividends until the target is reached. This fuels compounding, as cash dividends are used to buy more dividends, and those then do the same, year after year.

Another smart thing to do is to have a separate rainy-day fund. This would be ready for emergencies (broken boiler, car repair, sudden redundancy, etc). This prevents the selling of shares and the interruption of the compounding process.

Finally, savvy investment decisions can generate superior returns, reducing the time it takes to reach that £100k annually. These include focusing on high-quality companies with durable cash flows, solid returns on capital, and strong balance sheets.

Gaining experience

Of course, not every investment will be successful. Individual dividends can be cut if a firm runs into difficulties. However, avoiding loss-making enterprises with questionable competitive positions and overvalued shares can help.

Over time, as research and stock-picking skills improve, I think it’s possible to aim for an 11% average annual return (although it isn’t guaranteed). If this were achieved, it would take roughly 27 years to reach £1.43m. That’s by investing £750 a month (excluding any platform fees).

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.

A global bottling giant

One FTSE 100 share to consider to help grow a portfolio is Coca-Cola HBC (LSE:CCH). This European business bottles and sells brands for Coca-Cola across parts of that continent and Africa.

We’re looking at brands like Fanta, Schweppes, Sprite, and of course, Coca-Cola. It also sells Costa-branded coffee products and Monster energy drinks.

These have helped drive 9%-11% growth in sales and profits for years now. This is reflected in a five-year 60% share price rise. That’s before dividends, which also grew strongly.

One thing that might hold the stock back is a spike in inflation. If this occurred, it might force the firm to up prices, potentially putting pressure on volume growth.

On balance though, I see this as an excellent UK stock for beginners to consider. The company has agreed to acquire a 75% controlling stake in Coca-Cola Beverages Africa. This is the continent’s largest Coca-Cola bottler, and the deal opens up long-term growth opportunities across 14 emerging and frontier markets. 

The stock is reasonably priced and offering a 3.1% dividend yield.

Ben McPoland has positions in Coca-Cola Hbc Ag. 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

Three signposts pointing in different directions, with 'Buy' 'Sell' and 'Hold' on
Investing Articles

Could these 3 FTSE 100 shares soar in 2026?

Our writer identifies a trio of FTSE 100 shares he thinks might potentially have more petrol in the tank as…

Read more »

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

How much do you need in a FTSE 250 dividend portfolio to make £14.2k of annual income?

Jon Smith explains three main factors that go into building a strong FTSE 250 dividend portfolio to help income investors…

Read more »

Tesla building with tesla logo and two teslas in front
Investing Articles

275 times earnings! Am I the only person who thinks Tesla’s stock price is over-inflated?

Using conventional measures, James Beard reckons the Tesla stock price is expensive. Here, he considers why so many people appear…

Read more »

Investing Articles

Here’s what I think investors in Nvidia stock can look forward to in 2026

Nvidia stock has delivered solid returns for investors in 2025. But it could head even higher in 2026, driven by…

Read more »

Investing Articles

Here are my top US stocks to consider buying in 2026

The US remains the most popular market for investors looking for stocks to buy. In a crowded market, where does…

Read more »

Investing Articles

£20,000 in excess savings? Here’s how to try and turn that into a second income in 2026

Stephen Wright outlines an opportunity for investors with £20,000 in excess cash to target a £1,450 a year second income…

Read more »

DIVIDEND YIELD text written on a notebook with chart
Investing Articles

Is a 9% yield from one of the UK’s most reliable dividend shares too good to be true?

Taylor Wimpey’s recent dividend record has been outstanding, but investors thinking of buying shares need to take a careful look…

Read more »

Snowing on Jubilee Gardens in London at dusk
Value Shares

Is it time to consider buying this FTSE 250 Christmas turkey?

With its share price falling by more than half since December 2024, James Beard considers the prospects for the worst-performing…

Read more »