The head office pays social security for its branches.

Legal analysis: open an account with the relevant information of the social security institution where the company is located. The specific information needed to open an account is: 1. The original or photocopy of the business license and the photocopy with official seal; 2. The original bank account opening license and a copy with official seal; 3. Fill in two social security declaration forms and affix the official seal (the declaration forms can be downloaded from the social security agency website or collected at the window; 4. Copy of the insured's ID card.

Legal basis: Article 10 of the Social Insurance Law of People's Republic of China (PRC) * * * Employees shall participate in the basic old-age insurance, and both employers and employees shall pay the basic old-age insurance premium.

Individual industrial and commercial households without employees, part-time employees who have not participated in the basic old-age insurance in the employer and other flexible employees can participate in the basic old-age insurance, and individuals pay the basic old-age insurance premium.

The measures for the endowment insurance of civil servants and staff managed by reference to the Civil Service Law shall be formulated by the State Council.