Here’s how I’d invest £20,000 in a Stocks and Shares ISA to target a second income for life

Using a Stocks and Shares ISA to shield a second income from the taxman makes perfect sense. But how would our writer go about picking investments?

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.

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

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.

Opening a Stocks and Shares ISA makes perfect sense to me if I’m trying to build a second income stream for life. Thanks to its tax-efficient status, I pay nothing on any dividends I receive.

The question is, what do I fill it with if I had £20,000 to put to work? Well, no two investors are the same. But I can tell you exactly what I’d be looking for.

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.

Increasing the odds

From the outset, I must remember that no income stream is guaranteed. But I reckon there are a few simple ways of increasing my chances of getting paid every year.

First, I try to identify companies in resilient parts of the market. One example of this would be healthcare. It’s just a fact of life that all of us will get ill from time to time and require treatment. This means that earnings will stay pretty steady for companies operating in this sector.

The same goes for utilities. We all need access to gas, electricity and water.

A third industry I like is consumer goods — those things we buy out of habit or necessity. Food and drink are the obvious examples. Contrast this with luxury or tech goods where demand might wax and wane.

What I’m looking for

Having identified the most stable industries, I need to pick the best stocks within them. There are a couple of things I look for, both of which can often be found in a firm’s annual report.

For example, I want to see some evidence that a company has a decent history of delivering passive income. The odd missed year is acceptable, but consistency is the name of the game. Encouragingly, some UK stocks have paid out for decades without a gap.

I also like firms that have a track record of increasing dividends every year. As well as sending a message that trading is healthy, this can help to reduce the impact of inflation.

Don’t get greedy

At this point, there’s a really important thing I need to highlight. Neither of the things mentioned above tell me anything about whether a business will continue to send me cash. It’s for this reason that spreading my ISA allowance around the market remains a priority.

This is particularly the case if I’m seeking above-average dividend yields. As many experienced Fools will know, what looks too good to be true often is.

There’s no perfect percentage here. However, anything over, say, 6% would push me to do some extra research and check it’s likely to be paid.

And if all this sounds like too much work, there is another option. An index fund that just tracks the market returns (like the FTSE 100) will also generate income.

The first step

Few people — including me — have £20,000 hiding down the back of the sofa. But that’s not the point.

Owning a single share in a company still means I’m entitled to dividends, assuming it has a policy of distributing this cash (some companies will prefer to use it for other things).

This is why it makes sense for me to use up whatever amount of my ISA allowance I can.

The first step is always the hardest, but what better time to get started than right at the beginning of the year?

Paul Summers 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

Group of young friends toasting each other with beers in a pub
Investing Articles

FTSE 100 shares: has a once-a-decade chance to build wealth ended?

The FTSE 100 index has had a strong 2025. But that doesn't mean there might not still be some bargain…

Read more »

Passive income text with pin graph chart on business table
Investing Articles

I asked ChatGPT for its top passive income ideas for 2026 and it said…

Stephen Wright is looking for passive income ideas for 2026. But can asking artificial intelligence for insights offer anything valuable?

Read more »

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

Here’s how a 10-share SIPP could combine both growth and income opportunities!

Juggling the prospects of growth and dividend income within one SIPP can take some effort. Our writer shares his thoughts…

Read more »

Tabletop model of a bear sat on desk in front of monitors showing stock charts
Investing Articles

The stock market might crash in 2026. Here’s why I’m not worried

When Michael Burry forecasts a crash, the stock market takes notice. But do long-term investors actually need to worry about…

Read more »

Person holding magnifying glass over important document, reading the small print
Investing Articles

Is this FTSE 250 retailer set for a dramatic recovery in 2026?

FTSE 250 retailer WH Smith is moving on from the accounting issues that have weighed on it in 2025. But…

Read more »

Young Black woman using a debit card at an ATM to withdraw money
Investing Articles

I’m racing to buy dirt cheap income stocks before it’s too late

Income stocks are set to have a terrific year in 2026 with multiple tailwinds supporting dividend growth. Here's what Zaven…

Read more »

ISA Individual Savings Account
Investing Articles

Aiming for a £1k passive income? Here’s how much you’d need in an ISA

Mark Hartley does the maths to calculate how much an investor would need in an ISA when aiming for a…

Read more »

Two business people sitting at cafe working on new project using laptop. Young businesswoman taking notes and businessman working on laptop computer.
Investing Articles

Is investing £5,000 enough to earn a £1,000 second income?

Want to start earning a second income in the stock market? Zaven Boyrazian breaks down how investors can aim to…

Read more »