When considering their decision to make an advance or not, lenders will also take into account the amount of rent the borrower is hoping to realise from the property. Unlike a standard residential mortgage, most lenders view the property’s rental potential — rather than the borrower’s salary — as the primary source of income for servicing the loan.

For that reason, BTL lenders like to see a situation where the rental income covers at least 125% of the monthly interest payment. In other words, if your monthly mortgage payment is £1,000, the monthly rent should be a minimum of £1,250. (The borrower’s projections in terms of rental income must be verified by an independent source.) The difference between the two figures should help you meet your mortgage repayments when no rent is being received, or when repairs need making to the property.