1. Interest rate refers to the ratio of interest amount to loan fund (principal) amount in a certain period. Interest rate is not only the main factor that determines the capital cost of enterprises, but also the decisive factor of financing investment of enterprises. The research on the financial environment must pay attention to the current situation and changing trend of interest rates. Interest rate refers to the ratio of the amount of interest payable in each period to the face value of loans, deposits or loans (referred to as the total principal). The total interest of a loan or loan depends on the total principal, interest rate, compound interest frequency and the term of the loan, deposit or loan. Interest rate is the price the borrower pays for what he borrows, and it is also the lender's return to the borrower for delaying consumption and borrowing. The interest rate is usually calculated according to the ratio of interest to principal for one year.
2. Interest rate calculation has the following situations.
1. The basic formula for calculating interest on savings deposits is: interest = principal × deposit period × interest rate;
The second is the conversion of interest rate, in which the conversion relationship among annual interest rate, monthly interest rate and daily interest rate is: annual interest rate = monthly interest rate × 12 (month) = daily interest rate ×360 (day); Monthly interest rate = annual interest rate ÷ 12 (month) = daily interest rate ×30 (days); Daily interest rate = annual interest rate ÷360 (days) = monthly interest rate ÷30 (days). In addition, the use of interest rates should be consistent with the deposit term;
Third, the starting point of the interest calculation formula;
1, the starting point of savings deposit interest is RMB, and interest is not paid for cents below RMB;
2. The interest amount shall be calculated to one decimal place and rounded to one decimal place when actually paid;
3. All savings deposits, regardless of the deposit period, are paid with the principal at the time of withdrawal, excluding compound interest, except that the current savings are settled annually and the interest can be converted into the principal;
Fourth, the calculation of deposit term in the interest calculation formula;
1, and the storage period is calculated by counting the first number and the last number;
2, regardless of the big month, small month, flat month, leap month, every month is calculated as 30 days, and the whole year is calculated as 360 days;
3. The maturity date of all kinds of deposits shall be calculated on an annual and monthly basis. If the account opening date is the missing date of the expiration month, the expiration date should be the last day of the expiration month.