Calculation method of bank loan interest: Generally, compound interest is calculated on a monthly basis. There are two ways to repay by installments: one is equal principal and interest, and the other is average capital.
The specific formula is as follows:
Matching principal and interest: monthly repayment amount = [loan principal × monthly interest rate× (1interest rate) repayment months ]≤[( 1 interest rate) repayment months].
Average fund: monthly repayment amount = (loan principal/repayment months) (principal-accumulated amount of repaid principal) × monthly interest rate.
Generally speaking, the interest rate formula for calculating interest mainly includes:
Monthly interest rate = annual interest rate/12, daily interest rate = annual interest rate /360.
According to different repayment methods, the algorithm of interest is also different, but the basic algorithm is as follows:
Current month loan interest = the monthly interest rate of the remaining loan principal last month.
Principal paid in the current month = repayment amount in the current month-loan interest in the current month.
Last month's remaining principal = total loan-accumulated repaid principal.
Equal principal and interest repayment method: that is, the sum of loan principal and interest is repaid in equal amount every month. Most banks have adopted this method for housing provident fund loans and commercial personal housing loans. So the monthly repayment amount is the same.
Average capital repayment method: that is, the borrower repays each installment (month) during the whole repayment period, and at the same time pays off the loan interest from the previous trading day to the repayment date. In this way, the monthly repayment amount decreases month by month.
Pay interest on a monthly basis, and repay the principal at maturity: that is, the borrower repays the loan principal in one lump sum on the loan maturity date (applicable to loans with a term of less than one year (including one year)), and the loan bears interest on a daily basis, and the interest is repaid on a monthly basis.
Repay part of the loan in advance: that is, the borrower can repay part of the loan amount in advance when applying to the bank. The general amount is an integer multiple of 10000 or 10000. After repayment, the lending bank will issue a new repayment plan, and the repayment amount and repayment period will change, but the repayment method will remain unchanged, and the new repayment period shall not exceed the original loan period.
Repay all the loans in advance: that is, the borrower can repay all the loan amount in advance when applying to the bank. After repayment, the lending bank will terminate the borrower's loan and handle the corresponding cancellation procedures.
Borrow and pay back: interest is calculated daily after borrowing, and interest is calculated daily. You can pay the money in one lump sum at any time without any penalty.
How to calculate the loan interest?
Interest rate = interest/principal/time × 100%
For example: deposit 100 yuan,
The bank promised to pay an annual interest rate of 4.2%
Then the bank will pay 4.2 yuan interest in the second year.
The calculation formula is 100×4.2%=4.2 yuan.
The formula is: interest rate = interest ÷ principal ÷ time × 100%.
Interest = principal × interest rate× time
= 100×4.2%=4.2 yuan.
The final withdrawal 104.2= 104.2 yuan.
Extended data
Matters needing attention
1. When applying for a loan, the borrower makes a correct judgment on his repayment ability. Design a repayment plan according to your income level, leaving room for it and not affecting your normal life.
2. Choose the appropriate repayment method. There are two repayment methods: equal repayment and equal principal repayment. Once the repayment method is agreed in the contract, it shall not be changed during the whole loan period.
3. Repay on time every month to avoid penalty interest. From the month following the initiation of the loan, the lending time of the next month is usually the repayment date. Don't default on the penalty interest because of your negligence, so that the bank can't approve the loan application again.
4. Take care of your contract and receipt, read the terms of the contract carefully, and know your rights and obligations.
How to calculate the interest of bank loans
1. Monthly interest rate: that is, the interest calculated on a monthly basis. The calculation method is: monthly interest rate = annual interest rate ÷ 12 (month).
2. Daily interest rate: The daily interest rate is called the daily interest rate and is calculated on a daily basis. The calculation method is: daily interest rate = annual interest rate ÷360 (days) = monthly interest rate ÷30 (days).
3. Annual interest rate: usually in the form of percentage of principal, interest is calculated annually. Calculation method: annual interest rate = interest ÷ principal ÷ time × 100%.
4. Annualized interest rate: refers to the interest rate at which the inherent rate of return of products is discounted to the whole year, which is quite different from the calculation method of annual interest rate. Assuming that the yield of a wealth management product is one year and the yield is B, the annualized interest rate R is calculated as R=( 1B)A- 1.
5. Calculation formula of equal principal and interest: [loan principal × monthly interest rate× (1interest rate) repayment months] ÷ repayment months [( 1 interest rate) repayment months-1]
6. Calculation formula of average fund: monthly repayment amount = (loan principal ÷ repayment months) (principal-accumulated amount of repaid principal) × monthly interest rate.
Extended information:
Bank loan refers to an economic behavior in which banks lend funds to people in need at a certain interest rate according to national policies and agree to return them within a specified time limit. Generally, you need a guarantee, a house mortgage, or proof of income, and your personal credit information is good before you can apply.
Moreover, in different countries and different development periods of a country, the types of loans classified according to various standards are also different. For example, industrial and commercial loans in the United States mainly include ordinary loan quotas, working capital loans, standby loan commitments, and project loans. In Britain, industrial and commercial loans are mostly in the form of discounted bills, credit accounts and overdraft accounts.