Buy-to-Let Lending Grows in Q4 2025: Real World Impact on UK Landlords

Buy-to-Let Lending Surges in Q4 2025

As of April 2026, the UK buy-to-let mortgage market has experienced significant growth in the final quarter of 2025. According to UK Finance, a total of 59,489 new buy-to-let loans were advanced in the UK between October and December 2025, worth £11.2bn. This represents an increase of 18.2% by number and 21.3% by value compared to the same period in 2024. The average gross rental yield rose to 7.18% in Q4 2025, up from 6.99% a year earlier. In addition, the average interest rate on new buy-to-let loans fell to 4.77%, down eight basis points from the previous quarter and 32 basis points lower than Q4 2024.

Real World Impact on Landlords

Let’s consider a landlord with a £200,000 interest-only buy-to-let mortgage. With the average interest rate falling to 4.77%, their monthly cost drops from £917 to approximately £875. This translates to a saving of £42 per month or £504 per year. Furthermore, the average gross rental yield increase to 7.18% means that a landlord with a property worth £250,000 could expect an annual rental income of £17,950, up from £17,475 in 2024. This is an additional income of £475 per year.

Additionally, the number of fixed-rate buy-to-let mortgages outstanding increased by 2% year-on-year to 1.46 million, while variable-rate loans fell by 9.8% to 466,000. This reflects a continued shift towards fixed-rate products. If a landlord with a £200,000 mortgage switched from a variable rate to a fixed rate, they could potentially lock in the lower interest rate, providing more certainty over future repayments.

Arrears and Possessions

The number of buy-to-let mortgages in arrears of more than 2.5% of the outstanding balance fell to 9,520, down by 910 compared with Q3 2025. However, possessions rose to 770 cases, a 10% increase from 700 in Q4 2024. This shows that while overall financial stability may have improved for landlords, there are still those facing difficulties.

Market Context and Future Implications

It’s important to note that the growth in buy-to-let lending has been largely driven by landlords refinancing existing loans rather than new investment. This suggests that while the buy-to-let market is currently robust, new demand for buy-to-let purchases remains fragile, having fallen slightly in Q4 2025 compared to a year ago.

With the current base rate standing at 3.75%, the falling interest rates seen in Q4 2025 have now reversed. This could potentially dampen the growth in buy-to-let remortgaging. However, the falling borrowing costs in Q4 2025 pushed up the average interest cover ratio to 218%, compared with 201% a year earlier, indicating that landlords are in a better position to cover their mortgage interest payments.