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.

Turning a £10k ISA into a second income worth £8k a year!

Dr James Fox details his plans for transforming an ISA allowance into a second income to help fund his lifestyle. So what’s the catch? Well, it’s time.

Black father and two young daughters dancing at home

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.

We’d all love a second income. And with interest rates pushing higher and UK stocks offering some enticing dividend yields, we’re presented with a host of opportunities to generate a second income — notably a passive one.

But when it comes to investing, we need money to generate money. So either we’ve got the cash, or we need time to create a bigger pot.

XXX

The ISA

The Stocks and Shares ISA is a tax-free vehicle for our investments. More than 3.5m of us have an ISA — it should be more — which can be used for capital growth or income generation. Every year I can put away as much asa £20,000 in the ISA wrapper.

But today, I’m going to use £10,000 as my starting point. That’s half the allowance for a single year. This could represent a single cash injection or funds built up over a number of years.

So personally, I believe the highest sustainable yield currently available is around 8%. That involves investing in companies like Phoenix Group and Barratt Developments.

But if I only had £10,000, investing in companies averaging an 8% yield would only give me £800. That’s fine, but it’s not going to impact my life hugely.

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.

Building a bigger pot

In order to achieve £8,000 in dividends a year, I need to turn my £10,000 into £100,000. So how do I do this?

Well, it’s going to take time. Unfortunately, that’s normally the way with investing. Some investors can be attracted to the potential of growth stocks, but it’s worth remembering that many companies never deliver the promised growth — in fact, many fail entirely.

For my sins, I used to trade Novavax shares. Back then, the biotech firm was trading between $130-$300. Today, it’s worth just $8. I didn’t lose money, but many people did. This is just one of the companies that enticed novice investors as the price soared.

Instead, I’m using a compound returns strategy to try to turn £10,000 into £100,000. This is the process of reinvesting my dividends year after year.

Essentially, people who already have money find it easier to get more money just by leaving their investments to grow. It’s very much like a rolling snowball effect. The longer I leave it, the larger the pot becomes. 

So if I invested in stocks with 8% yields, and reinvested over 29 years, I’d potentially have £100,000.

But if I wanted to get there quicker, I could make regular contributions. If I contributed an additional £200 a month and increased my contributions by 5% a year, it would only take me 13 years to reach £100,000. In fact, after 30 years I’d have over £600,000. But of course, I might not manage those percentages and could even lose money.

Patience

Assuming it works, this investment strategy takes time and patience, as well as frequent contributions. But it’s one that can be hugely rewarding over time. With £100,000, I could draw down £8,000 a year, or, if I don’t need it, continue to reinvest.

James Fox has positions in Barratt Developments Plc and Phoenix Group Holdings. 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 »