How many grades are there in enterprise social security?

According to the relevant regulations of enterprise social security, the grade of enterprise social security payment may be different due to regional differences. Generally speaking, the social security payment base has five grades, the lowest grade is 40%, the first grade is 60%, the second grade is 80%, the third grade is 100%, and the highest grade is 300%. The specific payment according to several files has a certain relationship with personal income and occupation. For urban workers, the payment base mainly includes three grades, namely, the first grade is 60%, the second grade is 80%, and the third grade is 100%.