The battle begins: Burnham versus Dimon

Andy Burnham’s first day in power started on Monday and, immediately, as the new Prime Minister of Britain, Jamie Dimon, CEO and Chair of JPMorgan Chase gives him an ultimatum: increase our taxes and we’re off.

JPMorgan boss Jamie Dimon warns of ‘consequences’ if Andy Burnham taxes banks

Dimon casts doubt over JP Morgan’s London tower with tax warning to Burnham

Jamie Dimon’s intervention is all about the familiar tension between governments looking for tax revenue and global banks deciding where to invest.

The JPMorgan CEO warned that if Prime Minister Andy Burnham’s government increases taxes on banks, there will be “consequences” for investment in Britain. He singled out JPMorgan’s planned £3 billion London headquarters, suggesting that projects of this scale would be reconsidered if the UK became “hostile to banks.”

Dimon’s argument rests on three points:

• UK banks already pay additional sector-specific taxes, including the bank surcharge and bank levy, which JPMorgan argues makes Britain one of the highest-taxed banking jurisdictions in the developed world.
• JPMorgan says it has already paid billions of dollars in extra UK banking taxes over the years, despite not being responsible for the 2008 UK banking crisis.
• Large international banks have choices. Capital, jobs and new buildings can be directed to other financial centres if the economics become less attractive.

The warning comes because Burnham is reportedly considering higher taxes on banks as part of plans to fund public spending and support households facing continued cost-of-living pressures. Supporters argue that banks have enjoyed strong profits from higher interest rates and can afford to contribute more. Critics counter that higher taxes ultimately reduce investment, employment and London’s competitiveness as a global financial centre.

In reality, this is a classic negotiation. Governments know banks are difficult to tax without risking investment leakage, while banks know that threatening to move investment is one of the strongest levers they possess. Dimon’s comments are therefore as much a political signal as a commercial one, reminding policymakers that financial services remain highly mobile and that tax policy directly influences where global firms deploy capital.

The obvious question is: what is Jamie Dimon’s alternative? If the UK becomes less attractive, where does JPMorgan put its people and capital instead?

The options include:

1. New York – the default choice. JPMorgan is an American bank and New York remains its global headquarters. Any investment not made in London can simply stay in the US, where the bank already has scale, talent and infrastructure.
2. Paris – increasingly attractive since Brexit. France has successfully attracted trading desks, investment banking teams and asset management operations from London. JPMorgan already has a significant presence there.
3. Frankfurt – particularly for euro-denominated trading and banking. As the home of the European Central Bank, Frankfurt is a natural location for regulated European banking activities.
4. Dublin – attractive for fund management, technology and some banking operations due to its English-speaking workforce and corporate tax regime.
5. Luxembourg – primarily for custody, funds and wealth management rather than large investment banking operations.
6. Amsterdam – particularly for electronic trading and market infrastructure, although it is less likely to replace London as a full-service financial centre.
7. Singapore – if the growth opportunity is Asia rather than Europe. JPMorgan has been investing heavily there, especially in wealth management and technology.
8. Dubai – increasingly important for Middle East, Africa and South Asia, with favourable tax policies attracting international financial firms.

But can London really be replaced?

Not really as London still offers a unique combination of deep capital markets, English law, global talent,  time-zone advantages between Asia and America, foreign exchange leadership, insurance (Lloyd’s),  fintech ecosystem and an international culture. No other single city offers all of these together so, what is Dimon really saying?

He is probably not threatening to leave London. JPMorgan employs tens of thousands of people in the UK and has invested heavily over decades. Instead, he is signalling that future investment is discretionary. Rather than asking: “Should we leave London?”, he is asking: “Where should the next 5,000 jobs go?” “Where should the next technology centre be built?” “Where should we book new trading businesses?” “Do we spend another £3 billion in London, or somewhere else?”

That is the real leverage global banks have. Financial services are highly mobile, and while London is unlikely to lose its position overnight, it can gradually lose incremental investment if other jurisdictions become more attractive.

In other words, Dimon’s alternative is less about abandoning London and more about redirecting future growth to whichever financial centre offers the best combination of regulation, taxation, talent and market access.