Share your opinion and earn yourself a free Motley Fool premium report!

We are looking for Fools to join a 75 minute online independent market research forum on 15th / 16th December.

To find out more and express your interest please click here

How I’m setting up my Stocks and Shares ISA for a stock market crash

Our author is expecting a sharp decline in share prices. Here’s how he’s setting up his Stocks and Shares ISA to protect himself in advance.

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.

Mindful young woman breathing out with closed eyes, calming down in stressful situation, working on computer in modern kitchen.

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.

I’m being very careful with my Stocks and Shares ISA at the moment. I think that the recent rally in share prices is going to prove short-lived and that stocks have some way to fall before the next bull market.

In order to set myself up for the possibility of a stock market crash, I’m looking to do two things. The first is to be disciplined about how often I’m adding money to my ISA. The second is to make sure that I’m buying stocks at prices that I think are attractive. 

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.

Adding money

The first part of my plan involves being disciplined about depositing cash. In general, I try to follow Warren Buffett’s advice and add money to my account at regular intervals throughout the year. 

This can be difficult to do when share prices move downwards. For me, it can be easy to add money too quickly because stocks are cheaper than they were last week or last month.

The trouble with doing this is that shares might just become even cheaper! If I add extra money in September to take advantage of lower prices than August and the market is even lower in October, I’ll have made a bad move.

Buffett recommends that most investors add money gradually because nobody really knows when the stock market will reach its lowest point. But by investing gradually, I can make sure that I have money to invest whenever that is.

Share prices

A sudden fall in share prices won’t be a problem for me as long as I’m able to wait for them to recover and be confident that they will. But this relies on me not overpaying for the stocks I own in the first place.

For example, I’m looking at buying shares in Diploma for my portfolio at the moment. I think that the underlying business is tremendous and I’d love to own the stock.

In my view, though, the Diploma share price is a bit too high. The stock currently trades at around £25 and I think that its fair value is closer to £20.

If I buy shares at £20 and the price falls sharply, then I can be confident that it will recover because that’s what the business (in my view) is worth. But if I pay £25 per share, then I can’t have this confidence – I never thought the shares were worth that, so why should anyone else?

That’s why being disciplined in buying stocks is important for me. As long as I’m confident that share prices will recover, I won’t need to sell my stocks while prices are low. 

By doing this and staying disciplined about how much cash I add at a time, I think I’m putting my Stocks and Shares ISA in a position to survive a stock market crash.

Stephen Wright 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 woman holding up three fingers
Investing Articles

Want to start investing in 2026? 3 things to get ready now!

Before someone is ready to start investing in the stock market, our writer reckons it could well be worth them…

Read more »

Investing Articles

Can the stock market continue its strong performance into 2026?

Will the stock market power ahead next year -- or could its recent strong run come crashing down? Christopher Ruane…

Read more »

Businessman hand stacking money coins with virtual percentage icons
Investing Articles

Here’s how someone could invest £20k in an ISA to target a 7% dividend yield in 2026

Is 7% a realistic target dividend yield for a Stocks and Shares ISA? Christopher Ruane reckons that it could be.…

Read more »

A quiet morning and an empty Victoria Street in Edinburgh's historic Old Town.
Investing Articles

How little is £1k invested in Greggs shares in January worth now?

Just how much value have Greggs shares lost this year -- and why has our writer been putting his money…

Read more »

Businessman using pen drawing line for increasing arrow from 2024 to 2025
Investing Articles

This cheap FTSE 100 stock outperformed Barclays, IAG, and Games Workshop shares in 2025 but no one’s talking about it

This FTSE stock has delivered fantastic gains in 2025, outperforming a lot of more popular shares. Yet going into 2026,…

Read more »

Close-up of British bank notes
Investing Articles

100 Lloyds shares cost £55 in January. Here’s what they’re worth now!

How well have Lloyds shares done in 2025? Very well is the answer, as our writer explains. But they still…

Read more »

Thoughtful man using his phone while riding on a train and looking through the window
Investing Articles

How much do you need in an ISA to target £2,000 a month of passive income

Our writer explores a passive income strategy that involves the most boring FTSE 100 share. But when it comes to…

Read more »

Investing Articles

£5,000 invested in a FTSE 250 index tracker at the start of 2025 is now worth…

Despite underperforming the FTSE 100, the FTSE 250 has been the place to find some of the UK’s top growth…

Read more »