Discount interest rate refers to the interest calculated at a certain rate when commercial banks discount bills, which is often used for bill discount. This interest rate is the bill discount rate. When all the bills receivable of an enterprise need capital turnover before maturity, they can apply to the bank for discount or loan. The calculation formula of discount rate is: under the general loan interest rate, bill discount rate =( 1+ discount period) × general loan interest rate.

The discount rate of bills is determined by the financial market interest rate and fluctuates on the basis of the original interest rate. In addition, the discount rates of bills of various banks are not completely consistent, which should be subject to the actual regulations of banks.

When all the bills receivable of an enterprise need capital turnover before maturity, they can apply to the bank for discount or loan. After the bank agrees, from the date of bill discount or loan to the date of bill maturity, interest will be deducted from the face value of the bill at a certain interest rate to pay the balance. The discount rate is mainly determined by the financial market interest rate.

Discounting means that the payee transfers the unexpired commercial acceptance bill or bank acceptance bill to the transferee after endorsement, and the bank deducts the interest from the discount date to the maturity date of the bill according to the par value to pay the remaining amount to the holder (payee). When a commercial bill expires, the transferee may collect money from the acceptor against the bill.