An estimated 6.5 million current accounts that pay zero interest contained balances of more than £10,000 in 2025, new analysis by savings app Spring has revealed.

According to the figures, the average balance held in these accounts at the end of each month totalled £35,000.

Spring’s analysis of CACI data suggested that if those balances were held in a savings account paying interest of 4.11%, it would have generated £1,500 in interest over the year, or £9.75bn across the 6.5 million accounts.

The research also found that an average of £227bn was kept in current accounts with balances of more than £10,000 or more in 2025, equating to 71% of the total value of cash contained in current accounts earning zero interest (£319.4bn).

While the average balance was £35,000, some consumers held considerably higher amounts in their current accounts. Over 705,000 accounts contained between £50,001 and £100,000, with 327,000 accounts on average containing more than £100,000 at month end.

Spring stated that those with £50,000 are losing out on over £2,000 in interest, and those with over £100,000 are missing out on £4,200 annually, based on an alternative rate of 4.11%.

Head of money at Spring, Derek Sprawling, commented: “On average, over £315bn was held in current accounts earning nothing in the UK last year, £227bn in accounts holding £10,000 or more.

“You would expect that these would mainly consist of small balances, but our analysis shows that there are a significant number of accounts that contain sizeable funds, accounting for more than 70% of the overall balance.

“A current account is for day-to-day spending, not long-term storage. Yet millions of current accounts contained an average balance of £35,000 last year, which could have been earning significant returns.

“If you’re holding £50,000 or £100,000, the missed interest quickly tops £2,000 and £4,000. A simple switch to a competitive easy access savings account lets your money work harder while still staying within easy reach.”

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