Bank Tax Would Raise Mortgage Costs, Warns UBS

**Lead**

A new or increased bank tax in the United Kingdom would directly lead to higher mortgage costs for households, according to a warning from UBS. The Swiss bank’s analysis, circulated to clients this week, argues that any additional levy on the UK banking sector would be largely passed on to borrowers, undermining efforts to improve housing affordability.

**Context**

The UK government has been under pressure to raise additional revenue from the banking sector, particularly as it seeks to repair public finances following periods of high spending. A potential increase to the bank surcharge or a new levy has been floated in recent policy discussions. Currently, UK banks pay a corporation tax surcharge of 3% on profits above £25 million, on top of the main 25% corporation tax rate. Additionally, a bank levy applies to global balance sheet liabilities, though this has been scaled back in recent years.

UBS analysts note that any further tax increases would come at a time when banks are already facing higher capital requirements and regulatory costs. The banking industry has repeatedly cautioned that such costs cannot be absorbed without affecting lending decisions. In the mortgage market, where margins are already thin due to intense competition and rising funding costs, the impact would be particularly acute.

**Analysis**

The warning from UBS underscores a fundamental tension between the government’s revenue needs and its ambition to improve housing market conditions. Higher mortgage costs would run counter to the government’s pledge to boost homeownership and reduce the cost of living pressures for families. If banks are forced to shoulder a larger tax burden, the most immediate response would be to increase lending rates, especially on new mortgages. This could price some first-time buyers out of the market entirely, while those with variable-rate mortgages would face higher monthly payments.

Beyond the direct effect on individuals, higher mortgage costs could also dampen economic activity. The housing market is a significant driver of consumer confidence and spending. A prolonged period of elevated mortgage rates would reduce household disposable income, potentially slowing consumption and investment. UBS points out that the broader macroeconomic impact must be weighed against the relatively modest revenue a new tax might generate.

**Sources**

This report is based on an analysis note from UBS distributed to institutional clients in October 2026. Additional context was drawn from publicly available HM Treasury publications on the bank surcharge, as well as industry commentary from UK Finance regarding the potential effects of tax changes on lending. No direct quotes have been used, and all figures cited are from official sources or widely reported estimates. The FORTIS NEWS presents this information as a factual summary of market analysis, not as an endorsement of any political position.