The Wall Street billionaire will meet the new chancellor on Wednesday and caution him that higher taxes could put investment and employment in the UK at risk, it is understood.
It comes amid speculation that Healey is considering a windfall tax on banks and oil companies in his budget on 28 October.
Dimon has a long track record of lobbying against Britain’s additional bank taxes, which were imposed after the government bailed out big UK lenders in the 2008 financial crisis.
The JP Morgan CEO has previously warned that raising these taxes further could have “adverse consequences”. In August, he told Healey in a telephone conversation that higher levies could hit jobs, citing a fall in finance roles in New York that he blamed on the city’s tax regime.
Dimon was among a group of bank bosses who successfully lobbied against higher taxes before Rachel Reeves’ budget last year – with Dimon hosting Varun Chandra, who remains in his post as the prime minister’s business envoy, at a birthday celebration for King Charles at the bank’s Manhattan headquarters.
Days afterwards, Dimon announced plans to build a 3m sq ft tower in London’s Canary Wharf district, although he added that a “continuing positive business environment in the UK” was required.
However, in May this year, he said he could scrap plans for the £3bn tower – which is expected to serve as its UK headquarters and house more than half its 23,000-strong UK workforce – if Keir Starmer were replaced by a new Labour prime minister who was hostile to banks.
The UK’s four biggest lenders – HSBC, NatWest, Barclays and Lloyds Banking Group – have generated £200bn in pre-tax profits over the past five years, largely off the back of rising interest rates.
UK banks together paid an estimated £43.3bn in tax for the financial year that ended in March 2025, according to a report commissioned by the industry body UK Finance.