According to the repayment formula of general mortgage loans, it can be divided into two types:
1. Equal principal and interest calculation formula: calculation principle: the bank receives the interest of the remaining principal first, and then receives the principal from the monthly contribution; The proportion of interest in monthly payment decreases with the decrease of residual principal, and the proportion of principal in monthly payment increases with the increase, but the total monthly payment remains unchanged.
Second, the average capital calculation formula:
Monthly repayment amount = monthly principal+monthly principal and interest
Monthly principal = principal/repayment months
Monthly principal and interest = (principal-total accumulated repayment) x monthly interest rate
Calculation principle: the amount of principal returned every month is always the same, and the interest will decrease with the decrease of the remaining principal.
Housing loans mainly include the following:
1. Housing provident fund loan: For residents who have already paid the housing provident fund, low-interest housing provident fund loans should be the first choice when buying a house. Housing provident fund loans have the nature of policy subsidies, and the loan interest rate is very low, which is not only lower than the loan interest rate of commercial banks in the same period (only half of the mortgage interest rate of commercial banks).
2. Personal housing commercial loans: The above two loan methods are limited to employees who have paid the housing provident fund, and there are many restrictions. Therefore, people who have not paid the housing provident fund have no chance to apply for loans, but they can apply for personal housing secured loans from commercial banks, that is, bank mortgage loans.
I. The interest rate conversion formula for RMB business is (note: common for deposits and loans):
1. daily interest rate (0/000)= annual interest rate (%)÷360= monthly interest rate (‰)÷30.
2. Monthly interest rate (‰) = annual interest rate (%)÷ 12
Two, banks can use product interest method and transaction interest method to calculate interest.
1. Accumulate the account balance daily according to the actual number of days, and multiply the accumulated product by the daily interest rate to calculate the interest. The interest-bearing formula is:
Interest = cumulative interest-bearing product × daily interest rate, where cumulative interest-bearing product = total daily balance.
2. Transaction-by-transaction interest calculation method calculates interest one by one according to the preset interest calculation formula: interest = principal × interest rate × loan term, with three details:
If the interest-bearing period is a whole year (month), the interest-bearing formula is:
① Interest = principal × year (month )× year (month) interest rate
If the interest-bearing period is a whole year (month) and days, the interest-bearing formula is:
② Interest = principal × annual (monthly) × annual (monthly) interest rate+principal × odd days × daily interest rate.
At the same time, banks can choose to convert all interest-bearing periods into actual days to calculate interest, that is, 365 days per year (366 days in leap years), and each month is the actual number of days in the Gregorian calendar of the current month. The interest-bearing formula is as follows:
③ Interest = principal × actual days × daily interest rate
These three formulas are essentially the same, but because the interest rate conversion is only 360 days a year, when calculating the actual daily interest rate, it will be calculated as 365 days a year, and the result will be slightly biased.
Which formula is used specifically, the central bank gives financial institutions the right to choose independently. Therefore, the parties and financial institutions can agree on this in the contract.