according to the inquiry of Kangbo Finance, it is known that 4% of the loan is a folk term for the loan interest rate, that is, the monthly interest rate is .4%, and the annualized interest rate is 4.8%, which is reasonable. If the loan is 1, yuan and the interest is 4%, the interest for one month is 4 yuan, then the interest for one year is 48 yuan. Introduction to the difference between monthly interest and annual interest: the main difference between monthly interest and annual interest lies in the different expressions. "Monthly interest" means that interest is calculated on a monthly basis.