Monthly principal = total principal/repayment months
Monthly interest = (principal-accumulated principal repayment) × monthly interest rate
Total repayment interest = (repayment months+1)× loan amount× monthly interest rate /2.
Total repayment amount = (repayment months+1)× loan amount× monthly interest rate /2+ loan amount.
Note: In the average capital method, the amount of principal returned by a person every month is always the same, and the interest decreases with the decrease of the remaining principal, so the monthly repayment amount gradually decreases.
For example: 1. Loan 10.2 million yuan, annual interest rate of 4.86%, repayment period10 year;
Matching principal and interest:1repayment after 0 years 15 1750.84 yuan, with total interest of 3 1750.84 yuan;
Average capital:1repayment after 0 years149,403.00 yuan, with total interest of 29,403.00 yuan;
The difference between them: 2347.84 yuan/10 year, only 235 yuan a year.
2. The loan is 6.5438+0.2 million yuan, with an annual interest rate of 4.86% and a repayment period of 20 years;
Matching principal and interest: repayment after 20 years 187846.98 yuan, with total interest of 67846.98 yuan;
Average capital: repayment after 20 years178,563.00 yuan, with total interest of 58,563.00 yuan;
The difference between the two: 9283.98 yuan /20 years, only 465 yuan a year.
3. The loan is 3 million yuan, with an annual interest rate of 4.86% and a repayment period of 30 years;
Matching principal and interest: 57056 18.40 yuan will be repaid after 30 years, and the total interest will be 27056 18.40 yuan;
Average capital: after 30 years, the repayment is 565,438+093,073.80 yuan, and the total interest is 265,438+093,075.00 yuan;
The difference between them is nearly 5 1 1,000 yuan. The more loans, the longer the service life, and the more equal repayment of principal and interest than in average capital.