We have some exciting news to share! The Motley Fool UK has now become The Twelfth Magpie -- an independent, UK-owned company, led by our long-serving UK management team — Mark Rogers, Chris Nials and Heather Adlington. In practical terms, it’s the same team you know, now fully focused on serving our UK readers and members.

Just as importantly, our approach remains unchanged: long-term, jargon-free, and on your side. This site is our new home, and there will be extra tweaks made across the coming few days as we settle in. So if anything looks a little off, please bear with us!

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.

How to turn an ISA into £10k of annual passive income

Jon Smith cuts through the waffle and explains the steps and numbers involved in turning an ISA into a passive income machine.

View of Lake District. English countryside with fields in the foreground and a lake and hills behind.

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.

The new Stocks and Shares ISA year is underway, allowing investors to park £20k there over the next 12 months. The benefits of investing via an ISA are numerous, including the ability to avoid capital gains and dividend tax when selling a stock or getting income.

As a result, an ISA can be a great source to build up high levels of passive income further down the line. Here’s how to nail it.

XXX

Starting by working backwards

To reach a target of £10k of annual passive income, I need to work backwards. What does the total ISA pot need to be in order to reasonably expect to generate this kind of cash?

It all hinges on the average dividend yield I can get from the market. At the moment, the FTSE 100 average yield is 3.55%. But if I discount some stocks that don’t pay any income at the moment, and tilt to a more active portfolio, I can increase this to 5-7%.

Let’s take 6% as a figure for my forecasts. Using this number, an investor would need to have an ISA with a value of £166.6k. In the following year, they could expect to earn a 6% yield in income, totalling £10k.

Maximising investment potential

Now that we know the number we’re aiming for, it’s easier to work towards it. The first element to focus on is growing the dividend portfolio to a value of £166.6k. Given the contribution limit of £20k a year, it’s obviously going to take several years to reach this goal, even if the allowance is used up fully each time.

To help speed up the process, investors can reinvest the dividend income received in the early years. This allows the money to compound. For example, if I have £1,000 in a stock that pays me £60 in income, I can reinvest and have £1,060 in the company. The following year, I should earn £63.60. Over time, this can make a large difference, although I have to accept that dividends aren’t guaranteed and could be cut.

Being smart in dividend stock picks

The second element is how to yield 6% each year. This is hard, because dividends aren’t guaranteed. If a business has a bad year, there might be no income to pay out from earnings. This is a key risk to this overall idea.

Investors can try and minimise the impact of this. A good way is to diversify holdings, to include a dozen or more stocks within the ISA. Another way is to look at the track record over the past decade of income payments from a particular company. Although this doesn’t predict the future perfectly, it gives me a good indication of sustainability.

Goals for the future, starting now

An ISA is a great investment tool for the retail market. Over the space of a decade, it’s entirely reasonable to have the goal of reaching a stage to enjoy £10k in passive income.

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.

Jon Smith has no position in any of the shares mentioned. 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

Friends and sisters exploring the outdoors together in Cornwall. They are standing with their arms around each other at the coast.
Investing Articles

£503 buys 14 shares in this FTSE 250 stock that returned 23.9% annually for the last 15 years

This FTSE 250 stock has averaged a huge return for 15 years. At today's price, £503 buys 14 shares. But…

Read more »

Black woman using loudspeaker to be heard
Investing Articles

£1,000 buys 25 shares in this FTSE 100 stock that’s returned 29.2% annually for the last 10 years

This FTSE 100 mining stock has returned close to 30% a year for a decade. At 3,995p, £1,000 buys 25…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

Down 47%, is this growth stock finally worth buying in May?

With a £288m order book and a hidden pipeline of defence and nuclear contracts, is this growth stock now too…

Read more »

House models and one with REIT - standing for real estate investment trust - written on it.
Investing Articles

2 REITs yielding 7%+ to consider for passive income in 2026

A REIT backed by the NHS and another backed by Tesco and Sainsbury's with both yielding 7%+. Here's why I'm…

Read more »

Woman riding her old fashioned bicycle along the Beach Esplanade at Aberdeen, Scotland.
Investing Articles

Just 97 shares of this UK dividend stock generate £238 in passive income

A 5.7% yield, £238 in passive income from just 97 shares, and one of the most divisive dividend stocks on…

Read more »

ISA coins
Investing Articles

£10,000 in an ISA generates a second income of…

The London Stock Exchange is home to some of the world's most generous dividends. But how big a second income…

Read more »

Shot of a senior man drinking coffee and looking thoughtfully out of a window
Investing Articles

Expert recommendations: 2 top income stocks yielding 7%+!

With yields of 7.2% and 7.8% respectively, these two income stocks are catching the eyes of institutional analysts. Should investors…

Read more »

Illustration of flames over a black background
Investing Articles

3 top income-focused stocks to buy in May 2026, according to experts

Looking for a stock to buy for income in May 2026? Experts have flagged these three UK dividend shares as…

Read more »