Is it illegal not to pay social security during the trial period

Legal analysis: it is not legal to pay social security without signing a labor contract during the probationary period. Most companies have a three-month probationary period, and the Labor Contract Law stipulates that the employer shall sign an employment contract with the worker within one month after the worker joins the company; and purchase social security for the worker within 30 days from the date of employment. Therefore, it is illegal not to sign an employment contract and not to buy social security during the probationary period. Legal basis: The Law of the People's Republic of China on Labor Contracts Article 19 Where the term of a labor contract is more than three months but less than one year, the probationary period shall not exceed one month; where the term of a labor contract is more than one year but less than three years, the probationary period shall not exceed two months; where the term of a labor contract is more than three years but fixed or open-ended, the probationary period shall not exceed six months. The same employer and the same worker may only agree on one probationary period. A probationary period may not be agreed upon in an employment contract that is limited to the completion of a certain work task, or in an employment contract that is less than three months in duration. The probationary period is included in the term of the employment contract. If the labor contract only agrees on the trial period, the trial period is not established, and the period is the term of the labor contract.