I’d try to turn a £20k ISA into a £3,815 second income like this

Christopher Ruane explains how he’d aim to generate sizeable passive income streams by investing a £20k ISA into carefully-chosen dividend shares.

| 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.

Man writing 'now' having crossed out 'later', 'tomorrow' and 'next week'

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.

One way I use a Stocks and Shares ISA is to generate a passive income. That lets me benefit from the success of blue-chip companies without needing to do the hard work myself. Over the course of time, I think this approach could prove to be fairly lucrative.

If I had a spare £20k today to invest in a Stocks and Shares ISA with the objective of generating a second income of £3,815 a year, here is the plan of action I would adopt.

Choosing the right ISA

My first move would be to pick a Stocks and Shares ISA that suited my personal financial circumstances. There are lots of different options available, so I would want to pick the right one for me.

I could then put my £20k into it and get ready to start investing.

Setting a strategy

Next I would decide how I wanted to invest the money. If I was a novice investor, it Is at this point that I would learn the basics of how the stock market works.

Then I would decide my strategy. That does not need to be complicated, but I think having a sense of what I want to do could help guide my investment choices.

In all cases I would be looking for a great business selling at an attractive valuation. Only after establishing that would I then consider the dividend yield.

Finding shares to buy

Even the best business can run into unforeseen difficulties however, so I would diversify my ISA across a number of different shares. With £20k, I could comfortably spread my choices over five to 10 shares.

I would stick to business areas I felt I understood, so I could assess the prospects of the businesses in which I was thinking about investing.

The sort of income share I own in my portfolio is British American Tobacco (LSE: BATS). I like the multinational tobacco manufacturer’s portfolio of premium brands, its strong market position and large customer base. The company is a free cash flow machine and has raised its dividend annually for decades.

Hopefully, the juicy yield of 9.7% may not even fully reflect what I earn, if the dividend keeps growing.

But with cigarette sales declining and British American having a lot of debt, the dividend could go into reverse at some point and may even be cancelled if things get bad enough.

This illustrates why, as an investor, I need to consider seriously the risks of a share before I buy it. My hope for British American is that cigarette sales decline but still continue for decades, while the business grows its non-cigarette business.

Targeting income

Investing a £20k ISA at an average yield of 9.7% should earn me £1,940 in dividends annually. If I reinvest the dividends at first though, a 9.7%-yielding £20k ISA ought to let me hit my second income target of £3,815 annually after seven years.

If my average yield was lower, I could still aim to follow the same strategy but it would take me longer to hit my target.

C Ruane has positions in British American Tobacco P.l.c. The Motley Fool UK has recommended British American Tobacco P.l.c. 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

Bearded man writing on notepad in front of computer
Investing Articles

Have a £20,000 lump sum? Here’s how to target a £8,667 yearly passive income

How to turn £20,000 into a £8,667 passive income? Our Foolish author explains one counterintuitive strategy to build such an…

Read more »

British coins and bank notes scattered on a surface
Dividend Shares

2 dividend stocks that yield double the current UK interest rate

Following the latest UK interest rate cut, Jon Smith points out a couple of options that offer generous income relative…

Read more »

Investing Articles

A 9% yield and now this! Check out the stunning Taylor Wimpey share price forecast for 2026

Harvey Jones has kept the faith in Taylor Wimpey shares despite a difficult run, bolstered by their incredible yield. Next…

Read more »

Investing Articles

How much do you need in an ISA to aim for a life-changing passive income of £30,000 a year?

Harvey Jones says ISA savers can transform their futures in 2026 by investing in FTSE 100 dividend stocks with huge…

Read more »

Investing Articles

My top 10 ISA and SIPP stocks in 2026

Find out why a FTSE 100 investment trust is now this writer's top holding across his Stocks and Shares ISA…

Read more »

Rolls-Royce's Pearl 10X engine series
Investing Articles

£10,000 invested in Rolls-Royce shares 5 Christmases ago is now worth…

James Beard reflects on the post-pandemic Rolls-Royce share price rally and whether the group could become the UK’s most valuable…

Read more »

Investing Articles

Will Nvidia shares continue their epic run into 2026 and beyond?

Nvidia shares have an aura of invincibility as an AI boom continues to benefit the chipmaker. Can anything stop the…

Read more »

Investing Articles

Can Babcock’s and BAE Systems’ shares blast off again in 2026?

The defence sector has been going great guns in 2025, so Harvey Jones looks at whether BAE systems’ and Babcock’s…

Read more »