7% generally refers to monthly interest, so the annualized comprehensive interest is 8.4%, and the interest generated by one-time repayment of principal and interest at maturity is 30,000 * 8.4% = 2,520 yuan.

Loan repayment method:

(1) Matching principal and interest repayment method: that is, the sum of loan principal and interest is repaid by monthly matching repayment. Most banks have adopted this method for housing provident fund loans and commercial personal housing loans. In this way, the monthly repayment amount is the same;

(2) Equal principal repayment: a repayment method in which the borrower distributes the loan amount to each installment (month) evenly throughout the repayment period and 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;

(3) Paying interest and principal on a monthly basis: 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;

(4) Repaying part of the loan in advance: that is, the borrower can repay part of the loan amount in advance when applying to the bank, which is generally an integer multiple of 65,438+0,000 or 65,438+0,000. After repayment, the lending bank will issue a new repayment plan, in which the repayment amount and repayment period change, but the repayment method remains unchanged, and the new repayment period shall not exceed the original loan period.

(5) Repayment of all loans in advance: that is, the borrower can repay all the loan amount in advance when applying to the bank, and the loan bank will terminate the borrower's loan at this time after repayment and handle the corresponding cancellation procedures.

What is a loan:

Loan is a form of credit activity in which banks or other financial institutions lend monetary funds at a certain interest rate and must return them. Loans in a broad sense refer to loans, discounts, overdrafts and other borrowing funds. Banks put concentrated money and monetary funds out through loans, which can meet the needs of social expansion and reproduction and promote economic development; At the same time, banks can also obtain loan interest income and increase their own accumulation.