1, equal principal and interest
(1) Matching principal and interest means adding up the total principal and interest of the mortgage loan, and then distributing it evenly to each month of the repayment period. This calculation method is complicated, the interest of each period is not equal, but the sum of principal and interest of each period is equal.
(2) Calculation formula of equal principal and interest: monthly repayment amount = principal× monthly interest rate× [(1+monthly interest rate) N/[( 1+ monthly interest rate) N- 1], monthly interest rate = annual interest rate/12, and total interest = monthly repayment.
(3) If a house is *** 100 square meter, the price is 10000 yuan/square meter, the down payment is 30%, the loan term is 20 years, the maximum loan amount is 700,000, and the mortgage interest rate is 6.8%, then the monthly repayment amount is 5343.38 yuan, and the monthly repayment amount is the same. The total repayment amount is128241.20 yuan, and the total interest amount is 58241.20 yuan.
2. Average capital
(1) In the average capital, the total loan principal is divided into n periods according to the number of repayment periods, and then the loan principal is distributed to be repaid every month, which will pay off the loan interest between the last repayment date and the current repayment date.
(2) Calculation formula of average capital: monthly repayment amount = principal /N+ residual principal × monthly interest rate. Total interest = principal × monthly interest rate × (loan months /2+0.5)
(3) If a house is *** 100 square meter, the price is 10000 yuan/square meter, the down payment is 30%, the loan term is 20 years, the maximum loan amount is 700,000, and the mortgage interest rate is 6.8%, then the repayment amount in the first month is 6,883.33 yuan, and the repayment amount in the second month is 2,933 yuan. The total repayment amount is 1 177983.33 yuan, and the total interest amount is 477983.33 yuan.