However, it is necessary to obtain the consent of both borrowers and borrowers and sign a change or supplementary agreement. Because the previous repayment date is the result agreed by both parties when signing the loan contract, if one party wants to change the repayment date, it belongs to the scope of contract change. At this time, both parties need to negotiate separately and implement according to the agreed date. Loan interest rate benchmark interest rate According to the regulations of the central bank, the benchmark interest rate is implemented for auto loans, but financial institutions can float within a certain range of the benchmark interest rate. The term of auto loans in major banks is generally less than five years, and the interest rate of auto loans directly determines the cost of people's loans and becomes an important factor in determining whether people lend. How to calculate the car loan interest rate The formula for calculating the monthly car loan payment is: a = p (1+i) [(1+i) n-1]/N2/ia: monthly contribution P: total contribution I: monthly interest rate (annual interest rate/12