Is it illegal for companies not to buy social security?

Legal analysis: illegal. According to the law of our country, employers should pay social insurance for workers according to law, so it is illegal for enterprises not to pay social insurance for employees. If the unit fails to pay in full and on time, the social insurance fee collection agency shall order it to pay within a time limit or make up for it, and from the date of default, an overdue fine of 5/10000 shall be charged on a daily basis; Failing to pay within the time limit, the relevant administrative departments shall impose a fine of more than one time and less than three times the amount owed.

Legal basis: Article 58 of the Social Insurance Law of People's Republic of China (PRC): The employing unit shall register social insurance 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. Article 60 The employing unit shall declare on its own and pay social insurance premiums in full and on time. Except for legal reasons such as force majeure, the payment shall not be postponed or reduced. The social insurance premiums that employees should pay shall be withheld and remitted by the employer, and the employer shall inform me of the details of paying social insurance premiums on a monthly basis.