Quarterly repayment amount = loan principal ÷ number of quarters of loan term+(principal-accumulated repaid principal) × quarterly interest rate.
The calculation method of decreasing loan is average capital repayment method, also known as repayment method with interest and principal and average capital with unequal interest. The lender will allocate the principal to each month and pay off the interest from the previous trading day to the repayment date. The total interest expenditure is low, but the principal and interest paid in the early stage are more, and the repayment burden is reduced month by month.
For example, we also borrowed 200,000 yuan from the bank, and the repayment period was 15 years. If you choose to repay the same principal, you need to repay the bank principal11yuan every month, and the interest in the first month is 9 18 yuan, totaling 200 yuan in the first month. Then, you need to pay it back to the bank every month.
Extended answer:
Average capital repayment method is a very simple and practical repayment method. The principle of the basic algorithm is to repay the loan principal in equal amount on schedule during the repayment period, and at the same time pay off the interest generated by the unpaid principal in the current period. Repayment methods can be monthly repayment and quarterly repayment. Due to the requirement of bank interest settlement practice, quarterly repayment is generally adopted (such as China Bank).
Because the monthly repayment of the principal is fixed, the monthly loan interest decreases month by month with the decrease of the principal balance, so the average capital repayment method has a large monthly repayment amount at the initial stage of the loan, and then decreases month by month (monthly repayment amount = monthly repayment of the principal × monthly interest rate). For example, 654.38 million yuan, 15-year provident fund loan, the monthly repayment amount of the equal repayment method is 760.40 yuan, while the first month repayment amount of the average capital repayment method is 923.06 yuan (a decrease of 2.04 yuan per month), which is higher than the former 163.34 yuan.
Because the latter repaid part of the loan principal in advance, it actually reduced the occupation and shortened the occupation of the bank's money. Of course, the loan interest is generally low (* * * in 10 year, it is 36 13.55 yuan), which does not mean that the borrower has gained any additional benefits.
References:
Baidu Encyclopedia-Equal principal repayment