The maximum is not more than 30%. Intellectual property refers to people's exclusive rights to the fruits of their intellectual labor according to law. According to relevant information, the maximum interest rate of intellectual property pledge financing loans is not more than 30%, including: the maximum pledge rate of invention patents is 25%, the maximum pledge rate of utility model patents is 15%, the maximum pledge rate of well-known trademarks is 30%, and the maximum pledge rate of ordinary trademarks is 20%.