Bank tax, first-time buyer incentives and LTI reforms hit UK mortgage lenders on the same day
The Autumn Budget arrives today, 28 October, with three pressures on UK mortgage lenders: bank tax, Your First Home scheme, and loan-to-income (LTI) lending rule changes. Reports suggest Chancellor John Healey is weighing an increase to the bank corporation tax surcharge, from its current 3% to 8%.
That single measure could raise more than £2 billion annually for the Treasury, based on estimates from banking and credit advisory consultancy Broadstone. Credit analysts warn such a move could prompt banks to pull back across mortgages, personal finance, and business lending.
“Any increase in bank taxation could have knock-on implications for the availability and cost of credit if lenders respond by tightening lending criteria or becoming more selective about the borrowers they support,” said John Barbour, senior director at Broadstone.
Broadstone also flags a structural risk. Higher bank taxes could push more business towards non-bank and alternative lenders. That shift raises questions about regulatory oversight and credit risk monitoring across a wider market.
Mortgage professionals have been tracking this dynamic closely. Persistent affordability pressure on UK mortgage lenders from rates and wages means any additional tax burden on mainstream banks will sharpen competition at the margins.
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What could the Your First Home scheme mean for UK mortgage lenders?
The Budget is also expected to provide further detail on the government’s Your First Home scheme, announced by Prime Minister Andy Burnham in September 2026. The program allows first-time buyers to purchase new-build homes in England with deposits as low as 2.5%, supported by a 20% government-backed equity loan. Income caps and regional price limits are due to be set out on Budget day.
For mortgage professionals, the scheme raises specific underwriting challenges. Lenders will need to model the equity loan as a secondary charge alongside the primary mortgage. Affordability checks must account for deferred repayment obligations once any interest-free period expires.
The scheme could widen the pool of mortgage applicants. But it places greater weight on accurate income verification and longer-term repayment capacity modelling.
“New first-time buyer incentives and greater flexibility around higher loan-to-income mortgages could open up homeownership to more people, but potentially expose borrowers to greater financial pressures further down the line,” Barbour said.
LTI lending rules reset on Budget day
Separately, mortgage lending rule reforms take effect on 28 October. The changes follow the joint policy statement from the Prudential Regulation Authority (PRA) and the Financial Conduct Authority (FCA), published on 14 October 2026.
The reforms remove the firm-level cap. Previously, individual lenders were limited to writing no more than 15% of new residential mortgages at loan-to-income ratios of 4.5 times income or above. A market-wide aggregate limit of 15% remains, monitored quarterly by the PRA.
The PRA’s own data illustrates why the reform matters. High loan-to-income mortgages accounted for 14.1% of new lending in Q2 2026. That is up from 9.7% in Q3 2025 – a 4.4 percentage point rise in nine months.
The Bank of England’s decision to scrap firm-level caps on high loan-to-income lending has drawn close attention since the policy was confirmed earlier this month. With firm-level caps removed, lenders can now set their own high-LTI strategies based on internal risk appetite.
The shift creates commercial flexibility but transfers greater responsibility for affordability assessment and stress-testing to the lender itself. Those high LTI mortgage rules were first put to consultation by the PRA earlier in 2026, with the final policy confirming the direction of travel.
What does the Budget mean for mortgage market pricing?
Broadstone’s Barbour described the environment as “a pivotal moment” for the UK’s lending and credit markets. He pointed to economic volatility as an additional pressure, noting that persistent inflation continues to push up borrowing costs and mortgage rates.
Market pricing adds another layer. Gilt yields remain elevated. Any Budget-day deterioration in fiscal credibility could push funding costs higher, affecting the availability and pricing of mortgages across the market.
For UK mortgage lenders, the Budget represents more than a political event. The combination of potential bank taxation, new borrower incentives, and structural rule changes creates a risk modelling challenge that begins today.
