Most banks pay full penalty interest, such as China Bank, China Agricultural Bank, China Construction Bank, China Everbright Bank and China Guangfa Bank. A few banks calculate interest according to the outstanding amount. It doesn't matter if the user forgets to repay on the last repayment date. Generally, the bank will provide the user with a grace period of not less than 3 days, and no penalty will be charged for repayment during the grace period.