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.

£20k for a Stocks and Shares ISA? Here’s how it could deliver a £1k monthly passive income!

By maxing out this year’s ISA allowance, here’s how someone could target a four-figure passive income for retirement.

| More on:
A senior group of friends enjoying rowing on the River Derwent

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.

A Stocks and Shares ISA can be an exceptional way to generate passive income. With tax benefits boosting capital gains and dividend income, a lump sum or a regular investment can deliver a life-changing second income in retirement.

If an investor parked £20,000 in one of these ISAs today, here’s how they could eventually enjoy a roughly £1,000 tax-free cash payment every month.

XXX

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.

Targeting £1k

There are multiple ways that individuals can target passive income in retirement.

They can draw down a set percentage from their portfolio, or switch into dividend shares that pay a regular income. They can also buy an annuity that provides a guaranteed sum for life. Or they can select a combination of some or all of the above.

I like the idea of buying dividend shares, as — over time — it can deliver a second income while still allowing scope for portfolio growth. It’s the path I plan to go down. So how large would my ISA need to be for an approximate £1,000 monthly income?

If I targeted dividend stocks with 6% yields, I’d need to have £218,715 sitting in my portfolio when I retire. That would provide me with £1,094 each month.

To achieve this with £20,000 in my ISA, I’d have to target an average annual return of 8% over 30 years.

Source: thecalculatorsite.com

But how realistic is this sort of return? ‘Very’ is the answer, if the long-term performance of the stock market’s anything to go by.

Robust returns

Stock Market Index10-Year Average Annual Return
FTSE 1006%
S&P 50011.7%
AVERAGE8.9%

As you can see, someone who invested in UK and US blue-chip shares would have enjoyed a near-9% annual average return over the last decade.

History isn’t always a reliable guide to future investment gains. But the broader stock market has, time and again, proved its ability to rebound from crises and deliver powerful returns over time.

An investor today could target a large income by investing in individual shares and buying an exchange-traded fund (ETF). The iShares S&P 500 ETF (LSE:CSPX), for instance, is worth considering as a direct way to harness the S&P 500’s brilliant long-term returns.

This is a fund I hold in my own portfolio. By spreading my cash across hundreds of US shares, I can capture the enormous growth potential of tech shares (like Nvidia and Apple) while also diversifying to mitigate risk.

Just under a third (31.6%) of the fund is dedicated to information technology companies. The remainder is spread across multiple sectors including financial services, consumer goods, communications and healthcare.

By reinvesting dividends, this fund uses the power of compounding — earning a return on all my past returns — to supercharge long-term growth as well.

Funds like this can deliver poor returns during economic downturns. But over time, they’ve been great ways to unlock a healthy income for retirement.

Royston Wild has no position in any of the shares mentioned. The Motley Fool UK has recommended Apple and Nvidia. 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 »