The intermediary company deducted the money for failing to pay social security.

Legal analysis: the social security fee is collected from the unit by the local taxation bureau at the beginning of each month, so as long as the employee has to go to work for half a month, the unit needs to pay the social security fee for the employee this month, and the employee needs to bear the part paid by the individual social security fee this month.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 961 An intermediary contract is a contract in which the intermediary reports to the client the opportunity to conclude a contract or provides media services for concluding a contract, and the client pays the remuneration.

Article 962 The broker shall truthfully report to the client the matters related to the conclusion of the contract.

If the broker intentionally conceals important facts related to the conclusion of the contract or provides false information, which harms the interests of the client, he shall not ask for payment of remuneration and shall be liable for compensation.