Social security is paid three months in advance.

Legal analysis: it cannot be paid by individuals, but only by companies. Your previous company or your current company will pay part of the expenses with the company, depending on whether you are willing to make up for it. Because you have made up the payment every month, there will be more procedures.

Legal basis: Article 58 of People's Republic of China (PRC) Social Insurance Law. The employing unit shall handle social insurance registration for employees within 30 days from the date of employment. If the social insurance has not been registered, the social insurance agency shall verify the social insurance premium it should pay.