UK savers have collectively missed out on an estimated £1.9 trillion in potential returns by favouring cash ISAs over stocks and shares ISAs since the tax-free savings wrapper was introduced in 1999, according to new analysis from independent investment manager Chelsea Financial Services.
Since the tax-free savings wrapper was introduced, savers have contributed £856 billion to cash ISAs, compared with £453 billion to stocks and shares ISAs. Over that same 25-year period, global equities delivered returns six times the return of cash (+474% vs +80%), based on the MSCI World Index and Bank of England base rate respectively.
“Fears of stock market volatility have cost the British public trillions of pounds,” said Darius McDermott, managing director of Chelsea Financial Services. “Cash has its place for short-term needs. But history shows that over the long term, investing in equities, even though a balanced portfolio, has consistently delivered higher returns.”
Missed opportunities
The analysis highlights that savers’ sentiment often runs counter to stock market performance, with cash typically being allocated at the worst possible moments. In 2009/10, only 27% of ISA contributions went into stocks and shares, yet equities went on to outperform cash by 38x over the following 14 years (+523% vs +14%).
Conversely, in years when savers have become more enthusiastic about stock market investing, such as 2000 before the tech bubble burst and 2021 following the post-Covid rally, market downturns have frequently followed.
“Timing the market is notoriously difficult,” McDermott added. “A long-term, disciplined investment strategy through a stocks and shares ISA has consistently been the smarter approach. And there are plenty of lower-risk options available, such as bond funds, multi-asset funds and absolute return strategies, for savers who are cautious. Unfortunately, many savers still default to cash because it feels safe. However, over the long term, volatility can help grow your wealth using pound cost averaging, which ensures you invest through the cycle not just at the top.”
Mind the JISA gap
Chelsea Financial Services analysis also found that similar patterns exist with Junior ISAs (JISAs). Since the product’s launch, three-quarters of contributions in the first year went into cash – despite JISAs being locked until a child turns 18, making them inherently long-term investments.
So far, that decision has seen JISA savers miss out on more than 300% in performance (global equities +313% vs cash +12%), equating to an estimated £7 billion in lost returns.
Encouragingly, this trend is starting to shift. In the 2023/24 tax year, over £1 billion was invested into stocks and shares JISAs for the first time – almost two-thirds of all JISA contributions.
“Parents want the best for their children, but many still misunderstand the purpose of a Junior ISA,” McDermott commented. “When the money is locked away for 18 years or more, keeping it in cash simply doesn’t make sense. A stocks and shares JISA gives children a far greater chance of a meaningful financial head start in adult life. Failing to realise this is one of the biggest investing mistakes parents can make.”
Chelsea Financial Services’ analysis reinforces the importance of long-term investing within tax-efficient wrappers.
“It’s never too late to make your money work harder,” McDermott concluded. “The ISA remains one of the best tools for long-term wealth creation; but to really benefit, savers need to think beyond cash.”
