Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

How does a bank make money on an interest free secured loan?
In addition to all the points made in other answers, in some jurisdictions (including the UK where I live) the consumer credit laws require the lender to allow the borrower to pay off the loan at any time. If the lender charges interest and the borrower pays off the loan early then the lender loses the interest that would have been paid during the rest of the loan period. However if the actual interest is baked into the sale price of an item and the loan to pay for it is nominally "0%" then the borrower still pays all the interest even if they pay off the loan immediately. If you think this game is being played then you can ask for a "cash discount" (or similar wording: I once had problems with a car salesman who thought I meant a suitcase full of used £20s), meaning you want to avoid paying the interest as you are not taking a loan.