What happens when AI gets an affordability calculation wrong and who is liable
On 6 July 2026, the FCA published the Mills Review, its assessment of how artificial intelligence will reshape retail financial services by 2030. It opens with almost exactly this question. When an AI system arranges a customer's mortgage, moves their savings, or recommends a pension, who answers if it goes wrong. For a mortgage business, that is not an abstract question about the future. It is a question about what happens the day an affordability tool gets a case wrong, a customer is either approved for something they cannot sustainably repay or declined for something they could have afforded, and somebody has to explain what happened. The short answer, and the one the FCA has now restated twice this year in different forms, is that the answer has not changed. The tool does not carry the liability. The firm does. The regulator's position is not new, it is just being said more plainly The FCA has never built a separate rulebook for AI, and it has said clearly it does not int...