The law does not specify the specific amount of penalty interest. However, the law stipulates that the maximum interest rate shall not exceed the annual interest rate of 24%. "Provisions of the Supreme People's Court on Several Issues Concerning the Application of Laws in the Trial of Private Lending Cases" Article 26 If the interest rate agreed by both borrowers and lenders does not exceed 24% per annum, 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.

Legal objectivity:

Provisions on Several Issues Concerning the Application of Laws in the Trial of Private Lending Cases Article 26 If the lender requests the borrower to pay interest at the interest rate agreed in the contract, the people's court shall support it, except that the interest rate agreed by both parties exceeds four times the market quotation of one-year loan at the time of the establishment of the contract. The "one-year loan market quotation" mentioned in the preceding paragraph refers to the one-year loan market quotation issued monthly by the National Interbank Funding Center authorized by the People's Bank of China from August 20th, 20th, 20th19th.