What lenders look for in a Buy to Let mortgage application
Despite changes to landlord tax obligations such as the increase to the stamp duty surcharge in recent years, the Buy to Let industry is still strong. Buy to Let lending in the UK increased by 22.7% in Q3 of 2025, with average gross rental yields up to 7.15% from 6.93% the previous year.
Mortgage rates have been steadily falling since August 2024, as a result of the Bank of England base rate reductions, which have decreased from 5.25% in July 2024 to 3.75% in January 2026.
Landlords can now access lower mortgage rates compared to two years ago but eligibility criteria for Buy to Let mortgages are stricter than the criteria for standard residential mortgages.
Key criteria lenders assess for Buy to Let mortgages
Lending criteria for Buy to Let mortgages differs in some ways from residential mortgages. The key criteria that lenders assess for Buy to Let mortgages includes:
Some lenders require rental income to cover at least 125% of the mortgage payment (sometimes up to 145%). A higher deposit compared to residential mortgages is usually required. Lenders may assess personal income where applicants need to earn a minimum salary amount. Credit history is scrutinised more heavily than residential mortgage applications due to the higher perceived risk. The property type must meet the lender’s requirements, with HMOs and non-standard construction properties often harder to secure mortgages for compared to standard houses and purpose-built flats.
