The 200,000 mortgage is paid off in ten years, and the monthly repayment amount should be divided into two situations: equal principal repayment and equal principal and interest repayment. The calculation formula is as follows:

I. Specific formula for calculating average capital:

Monthly repayment amount = monthly repayment principal and interest;

Monthly repayment principal = total loan amount/loan months;

Monthly repayment interest = loan principal balance loan monthly interest rate (loan monthly interest rate = annual interest rate/12);

Loan principal balance = total loan amount-monthly repayment principal of repayment month.

Two. Calculation method of equal principal and interest Specific formula:

Monthly repayment amount = loan principal × monthly interest rate ×(65438+ 10 interest rate )× repayment months /[(65438+ 10 interest rate )× repayment months-1]

Total repayment amount = repayment amount per installment, and repayment months.

Extended data:

The choice of equal principal and interest method and average capital method;

Equal principal and interest method: the monthly repayment amount is the same. In the "principal and interest" distribution ratio of monthly payment, the interest ratio repaid in the first half is large, and the principal ratio is small, and it gradually turns into a large principal and interest ratio after the repayment period is over half. The total interest paid is more than that paid by the average capital method. The longer the loan term, the greater the interest difference.

However, because the repayment amount is the same every month, it is suitable for family expenditure planning, especially for young people, and the principal and interest method can be adopted, because income will increase with age or promotion.

Average capital method: the monthly repayment amount is different. It divides the loan principal into equal parts according to the total repayment months (average funds), and adds the monthly interest of the remaining principal in the previous period to form the monthly repayment amount. Therefore, the repayment amount in the average capital method is the largest in the first month, and then decreases month by month or even less. The total amount of interest paid is less than the equal principal and interest method.

However, this repayment method has a high repayment amount in the early stage of the loan period and is suitable for lenders with strong repayment ability in the early stage. The principal method can be used for the elderly, because income may decrease with age or retirement.