How quickly could we build a £10k passive income from a Stocks and Shares ISA?

Doesn’t it take a lifetime to build a decent passive income by buying shares on the UK stock market? Potential investors might be surprised.

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.

Passive income text with pin graph chart on business table

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.

If I’m looking for a passive income of £10k a year, there’s one thing I need to be clear about up front. I won’t be trying any get-rich-quick schemes.

But I do think it’s possible to reach a target like this quicker than people might think, using a Stocks and Shares ISA. Maybe even a lot quicker.

Still, let’s look at the idea of finding short cuts via the occasional multi-bagger. It’s not something I’d ever plan for, but it’s nice if it happens.

Boom and bust

We’ve had a few stocks in the past few years that look like they made some people a lot of money. In each case it was a small-cap, and the share price took off like a rocket.

One stock soared nearly 1,000-fold, which could have made that £10k income target in just a few weeks. But only for those lucky enough to sell at the top, as it quickly plummeted.

There was an almost certain pump-and-dump scam going on. But I won’t name the stock, as the company itself had nothing to do with it.

Short-term gains

Someone asked me an interesting question a few weeks ago. They know I invest for the long term, and mainly for dividends. But they wanted to know how I’d go about it if I wanted to make some short-term profits from the stock market.

So which stocks would I buy, and how would I choose them? My answer was simple. I’ve no idea. And that’s why I don’t try it.

I suggested throwing darts at the Financial Times and buying whatever companies they hit.

The long term

Anyway, back to the long term, which might not be so long. The average annual Stocks and Shares ISA return over the past 10 years comes in at 9.6%. Isn’t that remarkable?

That’s a decade that saw a global pandemic and a stock market crash. Yet we still had big profits from shares.

This seems exceptional though. And my thought is that we’re more likely to see something around 7% a year as a long-term average.

How much cash?

To get £10k a year at that 7% rate, we’d need to build up a pot a bit over £140k. So let’s say £145k to give us a bit of breathing space.

Someone who could use up their whole ISA allowance (currently £20k a year) could get there in only six years.

Now, I don’t have that much to invest. But £10k invested each year could reach the goal in just over 10 years.

And then, an investor with just £5k a year could get there in about 16 years. That’s £417 a month.

Here’s my take

These are just some ‘what if?’ numbers, to give us an idea of what might be possible.

There’s no certainty with shares, and those wanting guaranteed returns might go for a Cash ISA. But that could take a lot longer.

For me, I just invest as much as I can and hope I’ll be pleasantly surprised at the end of it.

Alan Oscroft 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

Young female business analyst looking at a graph chart while working from home
Investing Articles

Down over 30% this year, could these 3 UK shares bounce back in 2026?

Christopher Ruane digs into a trio of UK shares that have performed poorly this year in search of possible bargains…

Read more »

Mature people enjoying time together during road trip
Investing Articles

Yields up to 8.5%! Should I buy even more Legal & General, M&G and Phoenix shares?

Harvey Jones is getting a brilliant rate of dividend income from his Phoenix shares, and a surprising amount of capital…

Read more »

Light trails from traffic moving down The Mound in central Edinburgh, Scotland during December
Investing Articles

Up 7.5% in a week but with P/Es below 8! Are JD Sports Fashion and easyJet shares ready to take off?

easyJet shares have laboured in 2025, but suddenly they're flying. The same goes for JD Sports Fashion. Both still look…

Read more »

US Stock

I think this could be the best no-brainer S&P 500 purchase to consider for 2026

Jon Smith reveals a stock from the S&P 500 that he feels has the biggest potential to outperform the index,…

Read more »

Surprised Black girl holding teddy bear toy on Christmas
Investing Articles

Up 20% in a week! Is the Ocado share price set to deliver some thrilling Christmas magic?

It's the most wonderful time of the year for the Ocado share price, and Harvey Jones examines if this signals…

Read more »

Close-up as a woman counts out modern British banknotes.
Investing Articles

I asked ChatGPT for the 3 best UK dividend shares for 2026, and this is what it said…

2025 has been a cracking year for UK dividend shares, and the outlook for 2026 makes me think we could…

Read more »

Storytelling image of a multiethnic senior couple in love - Elderly married couple dating outdoors, love emotions and feelings
Investing Articles

£10k invested in sizzling Barclays, Lloyds and NatWest shares 1 year ago is now worth…

Harvey Jones is blown away by the performance of NatWest shares and the other FTSE 100 banks over the last…

Read more »

Investing Articles

£5,000 invested in these 3 UK stocks at the start of 2025 is now worth…

Mark Hartley breaks down the growth of three UK stocks that helped drive the FTSE 100 to new highs this…

Read more »