The society made the change after reviewing ONS data and personal customer scenarios.
Mike Taylor, product and marketing manager at The Mansfield Building Society, said: “As a responsible lender, we constantly test the way we look at expenditure and affordability against our customers’ circumstances.
“We feel that the new ONS data is fairer and more realistic, whilst ensuring accurate results.
“The new functionality from our online affordability calculator will further offer Intermediaries a quicker, simpler and clearer reflection of our assessment on a client’s ability to borrow.”
