How much do you need in an ISA to aim for a £10k annual passive income?

Jon Smith points out why patience is needed when trying to build a passive income and outlines one idea to consider.

| 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.

Close-up image depicting a woman in her 70s taking British bank notes from her colourful leather wallet.

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 Stocks and Shares ISA remains one of the most tax-efficient ways for millions of Britons to invest. A goal that many of us have is to buy dividend shares that can contribute towards a passive income. Of course, it’s not as easy as just buying a stock then sitting back and relaxing. Here are some key points to bear in mind.

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.

Different considerations

It’s essential to note that the maximum amount that can be invested in an ISA per year is £20k. Therefore, if an investor had a large lump sum, it might not be possible to allocate all of this in one year. What’s more likely to happen is to invest some funds each month and gradually build up the size of the portfolio to its desired level.

When discussing time, it’s also crucial to consider that generating £10k a year in income would logically require an ISA size of over £100k. Therefore, it’s a game of patience, given the timeframes involved. This isn’t a get-rich-quick scheme!

Next, the focus is on what yield is on offer. Of course, an investor could buy a FTSE 100 tracker fund that pays out dividends. This would currently yield 3.16%. Alternatively, being active in stock selection could see someone pick up a yield in the 6%-8% range by holding a dozen or so shares. I think this is realistic, with the portfolio still benefitting from diversification.

Looking for stocks

One stock for consideration is MONY Group (LSE:MONY). The company is a UK-based fintech specialising in comparison services. It basically helps customers compare prices for things like insurance and banking products. It makes money from taking fees and commissions from financial firms for customer referrals and switching.

Over the past year, the share price is down, but by a fairly modest 6%, with a current dividend yield of 6.28%. I think the dividend is sustainable for a few reasons. Firstly, the dividend policy states that it “seeks to pay annual dividends in excess of 55% of the group’s annual profits after tax.” This provides a benchmark for investors, meaning that it’s clear when to expect a dividend and roughly the amount.

Further, the business has good cash generation given the nature of its operations. It also has a fairly low-risk model, in that there are very limited outcomes where the company is exposed to any shocks or significant losses. As a result, this makes the chances of it cutting the dividend quite low.

Looking forward, the management team has been investing more in automation. This should not only aid cost reduction for the future, but also make the company less sensitive to wage inflation. Ultimately, this should help to support profitability in the long run.

As a risk, the business is exposed to changes in financial regulation, marketing rules, or competition. Any of these factors could erode margins. Yet based on the current situation, I think it’s a stock for investors to consider.

Talking numbers

If someone had an average dividend yield of 7% and invested £500 a month in an ISA, this could compound to a portfolio value of £143,346 after 14 years. In the following year, this could generate just over £10k in passive income.

Jon Smith has no position in any of the shares mentioned. The Motley Fool UK has recommended Mony 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 For Beginners

Investing Articles

I asked ChatGPT whether it’s better to invest £20k in a SIPP or an ISA and it said…

Investing in a spread of UK shares is a brilliant way to build wealth, but should investors do it inside…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

Here’s how to invest £7,000 in an ISA for a £500 passive income

Ben McPoland picks out a cheap dividend stock from the FTSE 250 that could generate chunky passive income in an…

Read more »

A quiet morning and an empty Victoria Street in Edinburgh's historic Old Town.
Investing Articles

£500 buys 595 shares in this 7.3%-yielding REIT!

Got a small lump sum to invest? Here's one real estate investment trust (REIT) offering a chunky payout to start…

Read more »

Investing Articles

With zero savings, how you could follow Warren Buffett and start building wealth today

Warren Buffett generated two thirds of his immense wealth after the age of 65. And his simple investment lesson can…

Read more »

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

After rising 64%, is the Lloyds share price on course for 120p?

Lloyds' share price has risen by almost two-thirds since early 2025. Can it continue rising? Or is the FTSE 100…

Read more »

Middle-aged white man wearing glasses, staring into space over the top of his laptop in a coffee shop
Investing Articles

No savings at 45? UK dividend shares could help you build wealth while earning extra income

Investing can be a great way to build long-term wealth. And the cash distributed by dividend shares can be a…

Read more »

Young female hand showing five fingers.
Investing Articles

The 5 most popular ETFs on AJ Bell to start 2026

Our writer highlights a handful of ETFs that have been popular among UK investors recently. Will he buy any of…

Read more »

Investing Articles

It’s already the last week of January! Time to start investing?

What's happened to those New Year's Resolutions so far in January? Our writer explains why it's never too late for…

Read more »