How I’m investing £20k in my Stocks and Shares ISA

What’s the best way to invest in a Stocks and Shares ISA? Stephen Wright’s plan is based on where share prices are, not where the stock market is going.

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.

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.

The new financial year is here, meaning a fresh £20,000 Stocks and Shares ISA contribution limit. Every year I make it my priority to use as much of this as I can – it just makes sense from a tax perspective.

But how should I go about doing this over the course of the year? Should I look to buy now, or should I hold my cash and wait for better opportunities to emerge?

Two strategies

One way of investing in the stock market involves trying to figure out when shares are at their cheapest and then buying them. This involves working out when the market isn’t going to go any lower.

The trouble with this approach is that it’s difficult. Knowing when prices are at their lowest levels is only easy looking back. In real time, it’s difficult, and some say impossible.

An alternative approach is to just buy as often as possible. That way an investor gets the average price of the market over time and if it goes up – which it generally does – the investor makes money.

This avoids the problem of trying to work out when shares are at their cheapest. But it involves buying stocks when they’re clearly in bubble territory and good returns from investments are unlikely.

With my Stocks and Shares ISA, I’m not following either approach. By using a different strategy, I’m hoping to avoid the problems with each.

Intrinsic value

Instead of trying to work out when stocks are as low as they’re going to be, my plan is to invest when I believe prices are below what the shares are worth. If I can do this, it avoids the problems of both approaches.

By focusing on what an investment is worth – its intrinsic value – I don’t need to know whether the price is going to be higher or lower tomorrow. I only need to know whether it’s below what I think it’s worth right now.

I also shouldn’t find myself buying when prices are too high. Sticking to investments where the stock trades at less than what I think it’s worth should stop me buying when prices are obviously too high.

This is the strategy billionaire investor Warren Buffett has used to such good effect over the years. So if it’s so successful, what’s the disadvantage – in other words, why doesn’t everyone do it?

The obvious reason is that working out what an investment is worth isn’t straightforward. Buffett’s success is as much a result of his own uncommon skill as his approach to investing in stocks.

I’m not suggesting I’ll achieve a Buffett-like return in my Stocks and Shares ISA. But there are things I can do to give myself a better chance with this approach.

Investing £20,000

The best thing is to stick to companies that are relatively easy to predict. By definition, this makes it easier for me to avoid overpaying for a stock when its price is more than its worth.

Whether prices go up or down, if I stick to buying shares below their intrinsic value, I can be happy I got a good deal. Rather than guessing about the future, when I see an opportunity, I plan to take it.

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.

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

Lady wearing a head scarf looks over pages on company financials
Investing Articles

Is April a good time to start buying shares?

Wondering whether now's a good time to start buying shares to build wealth? History suggests it is, says Edward Sheldon.

Read more »

A senior group of friends enjoying rowing on the River Derwent
Investing Articles

How much passive income could a Stocks and Shares ISA pump out every year?

Regular investing inside a Stocks and Shares ISA could lead to the equivalent of £141 a week in tax-free passive…

Read more »

Fans of Warren Buffett taking his photo
Investing Articles

With the FTSE 100 down 5%+ investors should remember this legendary quote from Warren Buffett

Warren Buffett is widely regarded as the greatest investor of all time. And he says that the best time to…

Read more »

Inflation in newspapers
Investing Articles

1 FTSE 100 stock that could benefit from higher inflation

For most companies, inflation is a risk. But for one FTSE 100 firm, higher input costs could be an opportunity…

Read more »

Man hanging in the balance over a log at seaside in Scotland
Investing Articles

The 2026 stock market sell-off could be a rare opportunity to build wealth in an ISA

The recent stock market sell-off has led to some shares falling 20% or more. This could be a great opportunity…

Read more »

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

It’s down another 13%! Analysts were dead wrong about the Greggs share price

The Greggs share price continues to fall and analysts have been revising their share price targets down further. Dr James…

Read more »

Burst your bubble thumbtack and balloon background
Investing Articles

Is the stock market about to reach breaking point?

Private credit has a problem with the emergence of artificial intelligence. And it could be set to create issues across…

Read more »

BUY AND HOLD spelled in letters on top of a pile of books. Alongside is a piggy bank in glasses. Buy and hold is a popular long term stock and shares strategy.
Investing Articles

A once-in-a-decade chance to buy this S&P 500 stock?

As investors focus on oil prices and the conflict in Iran, Stephen Wright's looking at potential opportunities in the S&P…

Read more »