Automobile pawn is protected by law within the annualized interest rate of mortgage loan of 24%, and the law does not support interest calculation. Even if there is a clear agreement, various expenses (including interest) during the overdue period cannot exceed 24% annualized. If the interest rate agreed between the borrower and the borrower exceeds the annual interest rate of 36%, the interest exceeding the annual interest rate of 36% shall be deemed invalid.

Legal basis: Article 680 of the Civil Code prohibits high-interest loans, and the loan interest rate shall not violate the relevant provisions of the state.

If there is no agreement on the payment of interest in the loan contract, it shall be deemed that there is no interest.

If the loan contract does not specify the payment method of interest, and the parties cannot reach a supplementary agreement, the interest shall be determined according to the local or the parties' trading methods, trading habits, market interest rates and other factors; Loans between natural persons are regarded as interest-free.

"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.