What if employees pay social security in other companies?

Legal analysis: it is the obligation of the employer to provide social security for employees, but employees can only apply for social security in one company and work in another company at the same time, and cannot apply for another social security. The law does not prohibit employees from working in two units at the same time. If working in other units causes damage to other units, the unit may request to terminate the contract.

Legal basis: People's Republic of China (PRC) Labor Contract Law.

Article 39 The employing unit may terminate the labor contract under any of the following circumstances. Since you are still working in another company and your salary is declared by your company, your social security should be paid by the unit that declared your salary. Don't declare your salary repeatedly for your registered company, otherwise the tax bureau system can compare it. You have income in two companies at the same time, and you have to pay personal income tax cumulatively. Your own registered company doesn't have to pay social security for you.

Article 4 Employers and individuals who pay social insurance premiums according to law in People's Republic of China (PRC) have the right to inquire about payment records and personal rights and interests records, and ask social insurance agencies to provide social insurance consultation and other related services. Individuals enjoy social insurance benefits according to law and have the right to supervise the payment of their own units.