Ok, how much interest does it cost to borrow 30 thousand in installments? Around 4000. According to relevant information, assuming that the loan term is 12 months and the credit rating is A, the repayment method of equal principal and interest is selected, and the total interest expenditure is about 4,000 yuan, and the monthly repayment amount is about 2,667 yuan. Good Staging is an Internet finance company that provides services such as installment consumption and loans. In view of the loan amount of 30,000 yuan, the loan interest in good installments will be different according to the loan term, credit rating, repayment method and other factors. The shorter the loan term, the lower the interest. The higher the credit rating, the lower the interest rate.