Legal analysis: whether the handling fee charged by microfinance is legal or not generally depends on the charging standard. If the sum of the fees for small loans and other expenses is converted into an annual interest rate of no more than 36%, this is a legal loan product. Among them, the borrower must repay the part with the annual interest rate below 24%, because this part of interest belongs to the scope of judicial protection stipulated by law. The annual interest rate between 24% and 36% can be negotiated. If the borrower has paid off this part of interest, he can't apply for a refund.

Legal basis: Article 6 of "Several Opinions of the Supreme People's Court on People's Courts Handling Loan Cases" can be higher than the bank's interest rate, and local people's courts can specifically grasp it according to the actual situation in the region, but the maximum shall not exceed 4 times (including interest rate) of the bank's similar loan interest rate. Beyond this limit, the excess interest will not be protected.