According to "Several Opinions on People's Courts' Trial of Lending Cases":
Six, the interest rate of private lending can be appropriately higher than the bank interest rate, the local people's courts can specifically grasp according to the actual situation in the region, but the maximum shall not exceed four times that of similar bank loans (including interest rates). Beyond this limit, the excess interest will not be protected.
Extended data:
The law also has other provisions on private lending information. For example, the interest rate agreed by both borrowers and lenders does not exceed the annual interest rate of 24%.
According to "Several Opinions of the Supreme People's Court on People's Courts Handling Lending Cases":
Article 26? If the interest rate agreed between the borrower and the borrower does not exceed the annual interest rate of 24%, and the lender requests the borrower to pay interest at the agreed interest rate, the people's court shall support it.
The interest rate agreed between the borrower and the borrower exceeds the annual interest rate of 36%, and the interest agreement in excess is invalid. The people's court shall support the borrower's request to the lender to return the part of the interest paid that exceeds 36% per annum.
References:
Some opinions on the trial of loan cases by people's courts-Baidu Encyclopedia