Average repayment method: that is, repay the loan principal on an average monthly basis and pay off the loan interest on a monthly basis; Calculation formula: monthly contribution amount = loan amount/total contribution period+(loan principal-repaid principal) x monthly interest rate 3. Because the loan involves the operating cost of the bank, the loan contract of the bank will have a default clause of prepayment. However, in the case that PBOC has not formally implemented the liquidated damages for prepayment, the major banks have responded flexibly to this clause and grasped it by themselves (generally, the liquidated damages will be exempted for high-quality customers and high-quality buildings). Of course, I will still explain what you are worried about: for prepayment, the loan interest can be exempted from the prepayment time, so the bank has the right to charge the prepayment penalty. According to the terms of your contract, default interest will be charged on a daily basis for prepayment, and the interest rate is 30% higher than the benchmark interest rate. In other words, the bank has the right to charge a penalty interest on a daily basis according to the repayment period occupied by the principal repaid in advance. That is, the 50,000 Yuan You paid in advance was originally your principal for the next 36 installments (assuming that the current benchmark annual interest rate is 7.83% and the interest rate of the first home purchase loan goes down 15%, I calculate that the monthly interest rate of your loan is 55,463%), then the bank will charge you a penalty interest of 3574.25 yuan (not floating) for these 36 installments, and if you don't pay in advance, it will go up by 30. After half a year (that is, after 10 repayment), 50,000 yuan will be repaid in advance, the term will remain unchanged, and the monthly repayment amount will be reduced. Then 50,000 yuan is free of penalty, and your total interest is 1065433. Finally, if you want to repay 50,000 yuan in advance, you must submit a written application to the bank. At this point, you must specify the amount of prepayment. Therefore, if you want to pay a penalty, you should deposit about 55,000 to 56,000 yuan for deduction according to the tips of the bank staff. If you don't need to collect liquidated damages, you should also deposit at least 5 1.300 yuan in cash, because if your monthly deduction date is 65438. If the bank arranges for you to deduct this 50,000 yuan on the 9th of next month, you will still collect the loan interest on a daily basis from the 9th of next month to the 6th of your 1 1. I calculated that the interest generated by your 1 1 period is about 1300, so I got this amount. (Many people pay in advance without penalty interest. I suggest you consult the loan bank.