Two months before Andy Burnham's first autumn budget, a familiar anxiety is coursing through the City of London. Bank executives, still flush from a run of bumper profits, are watching Westminster with a mix of dread and resignation. The question on every trading floor and boardroom is simple: will the new government tax those profits to fund its spending plans?
The chancellor, John Healey, is reportedly considering a windfall tax on banks and oil companies in the late October setpiece. The idea has been floated before, but this time it feels different. The government needs revenue. The public mood has shifted. And the banking sector, despite its protestations, remains deeply unpopular in some quarters.
Why a Windfall Tax on Banks Is Back on the Table
The rationale for a windfall tax is straightforward. Banks have enjoyed a prolonged period of high profits, driven largely by the gap between what they charge borrowers and what they pay depositors. That gap, known as the net interest margin, widened sharply as central banks raised interest rates to combat inflation. While households and businesses struggled with higher borrowing costs, many lenders posted record earnings.
At the same time, the government is searching for ways to fund public services and infrastructure without breaking its fiscal rules. A windfall tax, by definition, targets profits that are seen as unexpected or excessive. For a chancellor under pressure to deliver, it is a tempting option.
The Political Arithmetic Behind the Proposal
Andy Burnham's government came to power promising a new approach to the economy. There is a widespread expectation that the budget will mark a break from the past, with more emphasis on redistribution and public investment. Taxing the banks fits that narrative perfectly. It allows the government to position itself as tough on corporate excess while raising money from a sector that many voters view with suspicion.
Yet the politics are not entirely one-sided. The banking industry has powerful allies in parliament and the media. Critics of a windfall tax argue that it would be short-sighted, damaging the UK's competitiveness as a global financial centre. They warn that banks might relocate, cut lending, or pass costs on to consumers. Those arguments have been made before, and they carry weight in a country that relies heavily on financial services.
What a Windfall Tax Could Look Like
The exact design of any windfall tax remains unclear. Precedent suggests a few possibilities. The government could impose a one-off levy on profits above a certain threshold, similar to the Energy Profits Levy introduced for oil and gas companies. Alternatively, it could raise the existing bank surcharge, which already adds an extra 8% to the corporation tax rate for banks. A third option is a permanent increase in the bank levy, a tax on balance sheet liabilities.
Each approach has different implications. A one-off tax is politically easier to sell but less reliable as a revenue source. A permanent change would raise more money over time but could alter banks' behaviour more fundamentally. The chancellor's choice will reveal a lot about his priorities and his willingness to confront the financial sector.
The Banking Sector's Response
Unsurprisingly, bank executives are not thrilled. Industry groups have already begun lobbying against any new tax, arguing that banks already pay a higher effective rate than most companies. They point to the fact that the sector has rebuilt its capital buffers since the 2008 crisis and is now a significant contributor to the exchequer. They also warn that a windfall tax could undermine confidence at a fragile moment for the economy.
Some banks are quietly preparing for the worst. That might mean setting aside reserves, accelerating dividend payments, or shifting profits to other jurisdictions. But such moves carry reputational risks. No bank wants to be seen as dodging its fair share, especially when public sentiment is already hostile.
The Economic Stakes
The debate over a windfall tax is not just about politics. It touches on fundamental questions about the UK's economic model. Supporters argue that banks have benefited from an implicit state guarantee and that it is only fair they contribute more when times are good. Opponents counter that a healthy banking sector is essential for growth, and that taxing profits excessively will only harm the wider economy.
There is evidence on both sides. Studies of windfall taxes in other countries have produced mixed results. Some show that banks can absorb the cost without major disruption. Others suggest that such taxes reduce lending and investment, particularly to small businesses. The truth likely lies somewhere in between, and much depends on how the tax is structured.
What It Means for Consumers and Investors
For ordinary consumers, the impact of a windfall tax is indirect but real. If banks respond by raising fees or reducing interest on deposits, savers and borrowers will feel the pinch. If they cut back on lending, businesses may struggle to access credit. On the other hand, if the tax is passed on through lower dividends, shareholders will bear some of the cost. Pension funds, which hold large stakes in UK banks, could see their returns diminish.
Investors are already pricing in some risk. Bank shares have been volatile in recent weeks, reflecting uncertainty about the budget. A well-designed windfall tax might not cause lasting damage, but a punitive one could. The detail will matter enormously.
The International Dimension
The UK is not alone in considering higher taxes on banks. Several European countries have introduced or increased bank levies in recent years. The European Central Bank has even warned that such taxes could undermine financial stability if not carefully calibrated. The UK must weigh its domestic priorities against the need to remain an attractive place for international banks to do business.
Some analysts argue that the threat of relocation is overstated. London's advantages, including its legal system, time zone, and talent pool, are not easily replicated. But that does not mean banks are powerless. They can adjust their operations in subtle ways that erode the tax base over time.
The Road to the Budget
As the budget approaches, the lobbying will intensify. Expect a flurry of reports, briefings, and opinion pieces from both sides. The Treasury will be under pressure to show it is listening to concerns while also delivering on its promises. The chancellor's final decision will be one of the most closely watched elements of the budget.
For now, the banks are in the crosshairs. Whether they emerge unscathed or bruised will depend on a complex calculus of politics, economics, and public opinion. One thing is certain: the next two months will be tense for anyone with a stake in the UK's financial sector.
Frequently Asked Questions
Would a windfall tax on banks reduce lending to small businesses?
There is a risk that banks could respond to a windfall tax by tightening credit standards or increasing loan pricing, which could disproportionately affect small businesses. However, the extent of any reduction depends on the tax's design and the competitive landscape. Some banks may absorb the cost to maintain market share, while others may pass it on. Historical evidence from other countries is mixed, but regulators typically monitor lending closely after such taxes are introduced.
How much revenue could a windfall tax on banks raise for the UK government?
Estimates vary widely depending on the tax rate and base. A one-off levy on excess profits could raise several billion pounds, while a permanent increase in the bank surcharge might yield a similar amount annually. The final figure would depend on how profits are measured and whether certain activities are exempt. The Treasury has not published official projections, but independent analysts suggest the potential is significant, though not transformative for the public finances.
What is the difference between a windfall tax and the existing bank levy?
The existing bank levy is an annual tax on the balance sheet liabilities of UK banks, designed to discourage excessive leverage and raise revenue. A windfall tax, by contrast, is typically a one-off or temporary charge on profits above a certain level, justified by extraordinary circumstances. The bank surcharge is a separate additional tax on bank profits, currently set at 8% above the standard corporation tax rate. A windfall tax would be a new, targeted measure beyond these existing instruments.
Could a windfall tax cause banks to relocate their headquarters from London?
While relocation is possible in theory, it is unlikely in practice for most major banks. London's advantages, including its legal framework, talent pool, and time zone, are difficult to replicate. However, banks could shift certain activities or profits to other jurisdictions to reduce their tax liability. The risk of relocation is often overstated in political debates, but a particularly punitive tax could accelerate existing trends toward moving some operations to other financial centres.