Cash ISA returns are still negative. Here’s where I’d invest my money instead

Investing in a cash ISA could lead to reduced spending power over the long run, in my opinion.

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.

With around 80% of all ISAs being cash ISAs, it’s clear they remain a very popular product among consumers. Individuals may find them a simple way of saving for the future as there’s no tax paid on interest income.

Their popularity, though, is somewhat surprising. After all, they offer a negative return when inflation is factored in, while their tax advantages are becoming increasingly limited. As such, avoiding them could be a shrewd move, with a Stocks and Shares ISA potentially offering a more enticing risk/reward ratio for the long run.

Negative returns

With the best interest rates currently on offer within a Cash ISA being 1.5%, investors are losing money each year on an inflation-adjusted basis. This means that, with inflation being 1.9% at the present time, every £1 invested in a cash ISA offers reduced purchasing power in future. While this may not be noticeable over a period of months, over the coming years it could mean that savings held here become less effective for the purpose they were intended.

Furthermore, interest rate rises are not expected to be brisk over the coming years. The Bank of England may be cautious about raising rates too quickly. This may mean that the return on cash ISAs continues to lag inflation, with the gap between them having the potential to increase should there be a weakening of the pound as the Brexit process moves ahead.

Better option

From a tax perspective, there’s also little incentive to use a cash ISA. With interest rates so low, and the first £1,000 of interest income earned by an individual each year not subject to tax, a cash ISA would need to amount to £67,000 in order to provide any tax benefit at the present time.

In contrast, a Stocks and Shares ISA could help an individual who invests even a modest sum of money in shares to avoid dividend tax and capital gains tax. The former has become increasingly onerous in recent years, and could continue to be so over the medium term. As such, when it comes to planning for retirement and the potential to have a sizeable nest egg in place, maximising tax savings through a Stocks and Shares ISA could be worthwhile.

In terms of the potential for the stock market to beat inflation on a regular basis, this seems to be highly likely. Certainly, there may be years where even a cash ISA beats the return of the FTSE 100. But over the long run, the index’s 4%+ dividend yield and capital return potential should mean that it’s the more appealing option for investors who don’t require immediate access to their capital. Therefore, while cash ISAs remain popular, they appear to lack investment appeal relative to other assets.

More on Investing Articles

Yellow number one sitting on blue background
Investing Articles

I asked ChatGPT to pick 1 growth stock to put 100% of my money into, and it chose…

Betting everything on a single growth stock carries massive danger, but in this thought experiment, ChatGPT endorsed a FTSE 250…

Read more »

Portrait of pensive bearded senior looking on screen of laptop sitting at table with coffee cup.
Investing Articles

How little is £1,000 invested in Diageo shares at the start of 2025 worth now?

Paul Summers takes a closer look at just how bad 2025 has been for holders of Diageo's shares. Will things…

Read more »

Aston Martin DBX - rear pic of trunk
Investing Articles

After a terrible 2025, can the Aston Martin share price bounce back?

The Aston Martin share price has shed 41% of its value in 2025. Could the coming year offer any glimmer…

Read more »

Close-up of British bank notes
Investing Articles

How much do you need in an ISA to target £3,000 per month in passive income?

Ever thought of using an ISA to try and build monthly passive income streams in four figures? Christopher Ruane explains…

Read more »

piggy bank, searching with binoculars
Investing Articles

Want to aim for a million with a spare £500 per month? Here’s how!

Have you ever wondered whether it is possible for a stock market novice to aim for a million? Our writer…

Read more »

Investing Articles

Want to start buying shares next week with £200 or £300? Here’s how!

Ever thought of becoming a stock market investor? Christopher Ruane explains how someone could start buying shares even on a…

Read more »

Rear view image depicting a senior man in his 70s sitting on a bench leading down to the iconic Seven Sisters cliffs on the coastline of East Sussex, UK. The man is wearing casual clothing - blue denim jeans, a red checked shirt, navy blue gilet. The man is having a rest from hiking and his hiking pole is leaning up against the bench.
Investing Articles

2 ideas for a SIPP or ISA in 2026

Looking for stocks for an ISA or SIPP portfolio? Our writer thinks a FTSE 100 defence giant and fallen pharma…

Read more »

Midnight is celebrated along the River Thames in London with a spectacular and colourful firework display.
Investing Articles

Could buying this stock at $13 be like investing in Tesla in 2011?

Tesla stock went on to make early investors a literal fortune. Our writer sees some interesting similarities with this eVTOL…

Read more »