How to complain that the company pays less social security?

First of all, correct the information that the person just replied. There are some things he didn't make clear, and there are some mistakes:

1. It's no use handing this matter over to the labor inspection department. They will submit it to the labor arbitration commission where the company is located. The appeal period is not 1 year, and the arbitration law stipulates that it can be within 2 years.

Second, the requirement of acceptance is to write a complaint first, and then go to the industrial and commercial bureau to obtain the basic information form of the enterprise, which needs to be adjusted by a lawyer. Together with the evidence of the labor relationship between you and the enterprise (the requirements of the arbitration commission here are witness, material evidence and documentary evidence), at least two of them must be submitted to the arbitration commission. If all the above are ready, the arbitration commission has no reason not to accept it, but once you are accepted, you are half successful and leave the rest to the arbitration commission.

Three, you should focus on writing clearly the reasons and reasons in your complaint, as well as your claim for compensation. Judging from your situation, you can appeal in accordance with the Labor Contract Law and the Interim Measures for Wage Payment. Generally speaking, you will lose twice your salary during the period when you don't sign up to pay social security in time. If you leave your job because you don't pay social security in time, you can ask for 2 months' salary compensation (this is your situation).

Whether the contract signed by the company with you is valid or not depends on whether the company has hired you for the record. If it is not filed, the contract is invalid. If recorded, the contract is valid, but you must pay social security immediately. Therefore, if you don't pay social security, the contract will not be filed, which is equivalent to a pile of waste paper.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.