The company withheld social security for one month in advance.

It is unreasonable for the company to withhold social security one month in advance, as follows:

1. No matter the probation period or probation period, you can get as much money as you work for how many days. At the same time, social security must be paid together with wages, and the employer cannot default;

2. If the company does not cooperate, it can file a labor arbitration or a labor lawsuit. 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 goes 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 personal social security payment this month.

There is no legal basis for withholding social security next month. Paying social insurance premiums is deducted from last month's salary, that is, only the social insurance expenses of the month when the salary is settled can be deducted. Secondly, if the employer deducts wages, it should raise an objection.

No matter the probation period or probation period, you can get as many days' salary as you work. Social security and salary should be paid together, and the employer can't default. If the company does not cooperate, it can file a labor arbitration or a labor lawsuit.

Legal basis: Article 10 of the Social Insurance Law of People's Republic of China (PRC).

Employees shall participate in the basic old-age insurance, and the employer and employees shall jointly pay the basic old-age insurance premium.

Individual industrial and commercial households without employees, part-time employees who have not participated in the basic old-age insurance in the employer and other flexible employees can participate in the basic old-age insurance, and individuals pay the basic old-age insurance premium.

The measures for the endowment insurance of civil servants and staff managed by reference to the Civil Service Law shall be formulated by the State Council.

Article 11

The basic old-age insurance combines social pooling with individual accounts.

The basic old-age insurance fund consists of employers, individual contributions and government subsidies.

Article 12

The employing unit shall pay the basic old-age insurance premium according to the proportion of the total wages of its employees stipulated by the state, and record it in the basic old-age insurance pooling fund.

Employees shall pay the basic old-age insurance premium in accordance with the proportion of wages stipulated by the state and record it in their personal accounts.

Individual industrial and commercial households without employees, part-time employees who have not participated in the basic old-age insurance in the employing unit and other flexible employees who have participated in the basic old-age insurance shall pay the basic old-age insurance premiums in accordance with state regulations and record them in the basic old-age insurance pooling fund and individual accounts respectively.