The number of landlords behind on their mortgage payments has risen by almost a third over the summer, according to UK Finance.
The trade body says some 8,980 buy-to-let mortgages were in arrears of more than 2.5% at the end of June, an increase of 28% on March. Almost half of those struggling were in arrears of more than 5%.
If the trend of rising mortgage rates continues, landlords are expected to sell up, reducing the stock of rented homes and further pushing up rents.