Outstanding mortgages on a part interest-only and part repayment also fell by just over 10% to 156,000 over the same period.

The total interest-only stock, including purely interest-only and part-and-part, has reduced by 81% since 2012 when UK Finance started collecting the data.

At that time, the FCA, then the Financial Services Authority, warned of an interest-only “ticking timebomb” with many borrowers lacking a realistic plan for repayment.

Since then lenders have been contacting borrowers to ensure they set up suitable repayment plans before their loans reach the end of their term.

The latest UK Finance data also shows that the number of interest-only mortgages with loan-to-values above 75% fell by 27% in 2025.

Loans at these higher LTVs now make up just 4% of the total, compared with 36% 2012.

Additionally, the number of interest-only loans set to mature by 2027 shrank by 50% in 2025 to 60,000 loans.

UK Finance head of analytics James Tatch says: “In 2025, customers with interest-only mortgages continued to pay on or ahead of schedule, with 114,000 fewer mortgages on interest-only terms at the end of the year than at the start. 

“Lenders’ proactive communications strategies continue to ensure that those with historic interest-only loans have plans and ability to repay, with tailored help available for those who do not. 

“The interest-only book has shrunk in size each year since the end of the Financial Crisis and is now less than one fifth of that seen in 2012, when these data were first collected. 

“The remaining interest-only book is also in a far stronger position, with over two thirds of customers having a loan-to-value ratio of less than 50%. “This gives a much greater range of options if they cannot immediately repay their loan when it matures.

“There are now 60,000 loans remaining in the second distinct cohort of interest-only loans identified by the regulator in 2013 – those maturing between 2021 and 2027. 

“This is just 7% of the size of this segment in 2012, providing strong evidence that, like the first cohort, almost all customers are continuing to pay on or ahead of schedule. 

“The small number of borrowers who do not repay immediately upon maturity remains very low, and data consistently show the vast majority of these do in fact repay in full over the first few months following the end of term.”

But he adds: “Although the overall stock of outstanding interest-only loans continues to decline, we have seen a small increase in lending on a part-and-part basis. 

“This signals its potential as a tool to help plug the affordability gap, where appropriate for the customer’s circumstances. 

“We look forward to responding to the FCA’s proposals on its interest-only framework.”

National Association of Estate Agents (NAEA) Propertymark president Mary-Lou Press says: “These figures highlight the continued decline of interest-only borrowing and suggest that lenders’ proactive engagement with borrowers is having a positive impact.

“The 50% reduction in loans due to mature by 2027 indicates that many homeowners are addressing repayment plans well before the end of their mortgage term. 

“Some may be repaying capital early, while others are switching to repayment mortgages, refinancing, or moving to later-life lending options.

“The sharp fall in higher loan-to-value interest-only loans is particularly encouraging, pointing to a healthier risk profile across the market. 

“With more borrowers holding substantial equity in their homes, many now have greater flexibility and more options available when their mortgage matures.

“While some borrowers will still require support, the overall trend suggests that risk within the mortgage market continues to decline and that homeowners are better prepared for repayment than they were a decade ago.”