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 an empty ISA into a second income of £40k a year!

Earning a second income is a key objective for many stock market investors. Here’s how our writer would aim for £40k a year starting from scratch.

Happy couple showing relief at news

Image source: Getty Images

You’re reading a free article with opinions that may differ from The Twelfth Magpie’s Premium Investing Services. Become a member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn more, and get a free 'Best Buy Now' stock!.

Investing in dividend stocks can be a great way to earn a second income. With no tax due on dividends or capital gains and a £20k annual allowance to take advantage of, I’d use a Stocks and Shares ISA to pursue this goal.

But, how long would it take me to generate £40k in dividends every year starting from zero? Let’s crunch the numbers.

Should you buy Rolls Royce shares today?

Before you decide, please take a moment to review this report first. Despite ongoing uncertainties from US tariffs to global conflicts, Mark Rogers and his team believe many UK shares still trade at substantial discounts, offering savvy investors plenty of potential opportunities to learn about.

That’s why this could be an ideal time to secure this valuable research – Mark’s analysts have scoured the markets to reveal 5 of his favourite long-term ‘Buys’. Please, don’t make any big decisions before seeing them.

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.

Buying dividend shares

Since earning passive income is my chief objective, I’d focus on maximising my portfolio’s yield by investing in dividend shares.

UK investors are spoiled for choice. Compared to other leading global stock market indexes, the FTSE 100 and FTSE 250 have some of the highest concentrations of income-producing companies.

When searching for dividend stocks to buy, it’s important to look beyond the headline yield figure. Robust dividend cover and a reliable history of shareholder payouts are crucial factors that influence my decision to invest.

That’s because I prioritise dividend sustainability. Although no distributions are guaranteed, some stocks carry lower risks than others. Generally, dividend cover of two times earnings or more is a good indicator of safety.

Examples of dividend shares I own include:

StockDividend YieldDividend Cover
Diageo2.4%2.0x
Lloyds5.6%3.0x
Tesco4.4%2.0x

I wouldn’t confine myself to British shores either. An attractive way to gain overseas exposure could be to invest in an exchange-traded fund (ETF), such as the ProShares S&P 500 Dividend Aristocrats ETF.

This fund tracks the performance of the S&P 500‘s Dividend Aristocrats — companies that have consistently hiked their dividends for 25+ years.

Compound returns

Imagine I secured a 4% dividend yield across my holdings. That means I’d need a £1m stock market portfolio to earn a second income of £40k per year.

If I maximised my ISA contributions every year starting with nothing, it would take me a little over 20 years to achieve that goal at an 8% compound annual growth rate (CAGR), accounting for capital gains and dividend reinvestments.

Although an 8% CAGR is in line with the stock market’s historic performance, it’s prudent to model different rates of return. After all, past performance doesn’t guarantee future returns.

For instance, at a 6% CAGR, I’d need to expand my investment horizon to over 23 years. And at a 4% CAGR, I’d need to wait nearly 28 years until my annual dividend haul reached £40k.

In addition, it would be challenging to contribute £20k every year to an ISA. But, for investors who can afford it, the tax-free rewards are potentially great.

Risk management

Dividend investing isn’t risk-free. As I’ve alluded to, companies can cut or suspend their dividends if they encounter financial difficulty — including the examples I’ve provided in this article.

If companies I owned reduced payouts or stopped paying me passive income altogether, that would derail my neat calculations.

Diversification is a useful way to manage these risks. By spreading my investments across different businesses and sectors, I wouldn’t be overly reliant on any single stock to earn a second income.

Plus, the potential rewards over time are significant. Cash savings have rarely kept pace with inflation over long periods, so I’m buying dividend stocks to meet my passive income needs.

Charlie Carman has positions in Diageo Plc, Lloyds Banking Group Plc, and Tesco Plc. The Motley Fool UK has recommended Diageo Plc, Lloyds Banking Group Plc, and Tesco 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

Image of happy young people man and woman in basic clothing thinking and touching chin while looking aside isolated over yellow background
Investing Articles

I asked ChatGPT where Greggs shares might go next and it said… 

Harvey Jones is in two minds about the outlook for Greggs shares and called in artificial intelligence for its view.…

Read more »

Happy senior couple hugging and enjoying retirement at home
Investing Articles

Up 1,320% in 5 years — now check out the Rolls-Royce share price forecast for August 2027

The Rolls-Royce share price has completely smashed it but the big question is where it goes in future. Harvey Jones…

Read more »

Elderly, couple hiking and bird watching with adventure outdoor, hike together and fitness for active lifestyle. Nature, trekking and senior man pointing and woman with binocular, freedom and travel.
Investing Articles

After it rocketed to a 19-year high, here’s what the experts say about the Barclays share price outlook…

Harvey Jones examines why the Barclays share price has been flying lately and what broker forecasts suggest for the year…

Read more »

Man hanging in the balance over a log at seaside in Scotland
Investing Articles

I asked ChatGPT if the Lloyds share price will crash in 2026. It said…

What probability of a Lloyds share price crash does the world's leading artificial intelligence chatbot give? The answer may surprise…

Read more »

UK financial background: share prices and stock graph overlaid on an image of the Union Jack
Investing Articles

Will this week bring more bad news for BP shareholders?

The retreat in the oil price is good news for the global economy but bad news for BP shares. Harvey…

Read more »

Image of happy young people man and woman in basic clothing thinking and touching chin while looking aside isolated over yellow background
Investing Articles

How do I maximise the value of my Stocks and Shares ISA over the next 5 years?

Edward Sheldon has money in a Stocks and Shares ISA. And he wants to see the value of his portfolio…

Read more »

Portrait of pensive bearded senior looking on screen of laptop sitting at table with coffee cup.
US Stock

I asked ChatGPT where the SpaceX share price will be at the end of 2026. It said…

Jon Smith decides to get another opinion on the direction of travel for the SpaceX share price, and ChatGPT is…

Read more »

Investing Articles

Are Scottish Mortgage shares an unmissable buy after the SpaceX stock crash?

Harvey Jones wonders whether investors have been given an opportunity to buy Scottish Mortgage shares at a decent price, as…

Read more »