UK bank-tax reports: the rate is only half the story

A higher bank-tax rate need not mean a bigger bill for every lender. Changing the amount of profit exempt from a surcharge, or limiting how old losses reduce taxable profits, can redistribute the burden. The economic question is which earnings the Treasury would tax, not simply how high the headline rate goes.

The Guardian reported on October 15 that Chancellor John Healey is poised to tax banks in his October 28 Budget. The BBC separately reported that senior banking executives expect the sector to be targeted. These are reports of plans and expectations, not an announced tax measure. [1] [2]

HMRC’s current rates table lists a 25% main corporation-tax rate for 2026. The BBC reports that the biggest banks and building societies currently pay a 3% surcharge on top of that baseline. The surcharge is an additional tax, not the whole corporate tax bill. [3] [2]

According to the Guardian, industry figures believe one option would raise the surcharge from 3% to 8%. [1]

The same report says Healey has been listening to specialist banks, including Revolut and Shawbrook, that want the profit threshold for the surcharge raised from £100 million to £500 million. [1]

If both changes were adopted, a higher rate and a higher threshold could pull surcharge bills in opposite directions. A hypothetical lender whose affected profits fell between the old and new thresholds could be sheltered from the surcharge even as the headline rate rose. Other taxes would still matter.

The BBC reports a different option: some analysts and bank executives have advocated pausing the use of past losses to reduce taxable profits for a few years. It identifies Lloyds as a particular beneficiary of the existing treatment. That option concerns the taxable profit base, not just the rate. [2]

If a measure raises a bank’s tax bill, it leaves less after-tax profit unless earnings elsewhere compensate. Management could respond through dividends, retained earnings or pricing. For borrowers and savers, terms worsen only if some cost is passed through; the reports do not measure that response.

UK Finance warned the BBC that further bank-tax increases would weaken competitiveness and discourage investment and job creation. Those are the industry body’s warnings, not observed effects of a new measure. [2]

The strongest rival explanation is that pre-Budget pressure is being mistaken for a settled decision. No additional bank tax in the Budget would overturn the expectation of an impending extra burden. Even if a measure appears, banks might absorb it in lower shareholder returns rather than worsen customer terms. Stable terms and lending would weaken a pass-through argument.

On October 28, check whether the Budget changes the rate, profit threshold or loss-offset rules, and when any changes would start. Then compare banks’ disclosures of the resulting tax charge, separating tax effects from changes in underlying earnings. Watch lending and deposit terms too. The useful comparison is who pays, when and on which profits—not an assumed uniform hit to every bank.