Is it illegal for a company to pay social security for a part-time job?

Legal analysis: it is not legal, social insurance registration implementation of territorial management, account opening and payment unit should be "employer", that is, with the workers to establish labor relations with the employer. If the labor contract is signed with the company, the social insurance should also be paid in the name of the company, and many companies entrust a third party and use the third-party social security account for social security contributions is not in line with the law.

Legal basis: "Chinese People's **** and State Social Insurance Law"

Article 57 The employer shall, within thirty days from the date of its establishment, with its business license, certificate of registration, or seal of the unit, apply to the local social insurance agency for social insurance registration. The social insurance agency shall examine and approve the application within fifteen days from the date of receipt of the application and issue the social insurance registration document.

Article 58 An employer shall, within thirty days from the date of employment, apply for social insurance registration for its employees with the social insurance administrative organization."