1. This payment grade is mainly the payment grade of the payment base, divided by region. For example, the first file includes Wuhan and provincial units, with a payment base of 6233 yuan, a lower payment limit of 3740 yuan per month, and an upper payment limit of 18699 yuan per month; 2. The second payment base is 5250 yuan, with a lower limit of 2880 yuan and an upper limit of 15750 yuan. Including 7 cities including Huangshi, Shiyan and Yichang; 3. The third payment base is 5000 yuan, the lower payment limit is 2700 yuan, and the upper payment limit is 15000 yuan, including Enshi, Huanggang and Tianmen. Judging from the payment base published by Hubei Province, Wuhan's payment base is the highest in Hubei Province, which belongs to the first file, with an average of 983 yuan higher than the second file every month.

Legal basis: People's Republic of China (PRC) Social Insurance Law.

Article 12 The employing unit shall pay the basic old-age insurance premium according to the proportion of the total wages of employees stipulated by the state and record it in the basic old-age insurance pooling fund.

Employees shall pay the basic old-age insurance premium in accordance with the proportion of wages stipulated by the state and record it in their personal accounts.

Individual industrial and commercial households without employees, part-time employees who have not participated in the basic old-age insurance in the employing unit and other flexible employees who have participated in the basic old-age insurance shall pay the basic old-age insurance premiums in accordance with state regulations and record them in the basic old-age insurance pooling fund and individual accounts respectively.

Twenty-third employees should participate in the basic medical insurance for employees, and employers and employees should pay the basic medical insurance premiums in accordance with state regulations.

Individual industrial and commercial households without employees, part-time employees who have not participated in the basic medical insurance for employees and other flexible employees can participate in the basic medical insurance for employees, and individuals pay the basic medical insurance premium in accordance with state regulations.

Article 35 The employing unit shall pay the work-related injury insurance premium according to the total wages of employees and the rate determined by the social insurance agency.

Forty-fourth employees should participate in unemployment insurance, and employers and employees should pay unemployment insurance premiums in accordance with state regulations.

Fifty-third employees should participate in maternity insurance, the employer should pay maternity insurance premiums in accordance with state regulations, and employees do not pay maternity insurance premiums.