ISAs: Cash is still King but should it be?

September 26, 2025
September 26, 2025 Dale Kirkpatrick

Let’s talk about ISAs, or Individual Savings Accounts. These are UK savings accounts that let you save money without paying tax on the interest you earn. Most people think of these as bank accounts but there are several different types of ISAs, with Cash or Stocks & Shares as the 2 most popular. At the end of the 2023-2024 tax year, there was £872 billion in ISA accounts.

What’s the Difference?

  • Cash ISAs – These are like normal bank accounts where you put your money in, and it earns interest over time. The interest rates can change, but your money is safe and won’t go down in value.
  • Stocks & Shares ISAs – These are a bit different. Instead of earning interest, your money is invested in a range of assets, primarily in the stock market. This means your money can grow more, but it can also go down as well.

The Dominance of Cash ISAs

For a long time, Cash ISAs have been more popular than Stocks & Shares ISAs. People like them because they’re simple and safe. You know your money is there, and it’s not going to disappear. According to the latest research from the UK government, around 66.2% of all ISAs are Cash ISAs. Every year, more and more money is being put into ISAs. In the 2023-2024 tax year, about £103 billion was subscribed to Adult ISAs, with around £69.5 billion contributed into Cash ISAs and just over £31 billion into Stocks & Shares ISAs.

Changes Over Time

While Cash ISAs are still very popular, there’s been a noticeable shift. More people are starting to look at Stocks & Shares ISAs. Why? Well, interest rates on Cash ISAs have starting to go down again, meaning the money you save doesn’t grow as much as it used to. Stocks & Shares ISAs have the potential to grow a lot more, even though there is an element of risk.

Should You Switch to Stocks & Shares ISAs?

This is a big question! If you’re someone who likes to play it safe and doesn’t want to risk losing money, sticking with a Cash ISA might be the best choice. The only other reason for sticking to a Cash ISA is if you have plans for the money in the next few years, so you can’t risk the value dropping.

But if you’ve no plans for the money in the next few years, you need to consider the effects of inflation on your money. If you are willing to take a bit more of a risk for the chance of higher returns, a Stocks & Shares ISA should be a good option. And likely you’re only option which has a chance of tracking, if not beating inflation.

Long-Term Savings and Beating Inflation

Now, let’s talk about something important: inflation. Inflation is when the prices of things go up over time. This means that the money you have today won’t be worth as much in the future. If you have no plans for the money you’re saving, or if you’re putting it away for the long term, you should think about investing it to beat inflation.

Cash ISAs are great for short-term savings because they’re safe and you know your money is there. But with interest rates going down, the money you save in a Cash ISA might not grow enough to keep up with inflation. This means that over time, your money could lose it’s purchasing power.

On the other hand, Stocks & Shares ISAs have the potential to grow more over the long term. Even though they’re riskier, they can help your money grow faster than inflation. This means that the money you save today could be worth more in the future, at very least retaining its purchasing power.

Final Thoughts

In the end, the choice between a Cash ISA and a Stocks & Shares ISA depends on your personal situation and how comfortable you are with taking risk. If you need the money in the next couple of years, stick with cash. If there’s no specific purpose for it, consider investing.

If you’re unsure, give us a shout and we can help you make the best decision for your money.

 

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