you should buy full social security.

according to the relevant provisions of the labor law, the employer must sign labor contracts with employees and purchase insurance, so it is necessary to purchase social security, which is compulsory insurance. Therefore, you can negotiate with the employer to solve the problem. If there is no result, you can apply for labor arbitration or report and complain to the local labor and social security department, which can be effectively solved.

the evidence is that there is a labor relationship with the unit, such as salary slips and work badges.

Generally, it is necessary to pay the overdue month.

The calculation is as follows:

Medical insurance: 2% for the individual and 8% for the company;

Old-age insurance: 8% for individuals and 21% for units;

unemployment insurance: 1% for individuals and 2% for the unit;

industrial injury insurance: none for individuals, 1% for the unit;

maternity insurance: no individual, unit 1%;

provident fund: 3.5% for individuals and 3.5% for units.

The expenses of work-related injury and maternity insurance are borne by the unit.

For example, if the salary is 6,111 yuan/month, the premium to be paid is:

Medical insurance: 6,111 * 2% = 1.21 yuan, and the unit is 6,111 * 8% = 481 yuan;

endowment insurance: 6111*8%=481 yuan, and the unit is 6111*21%=1211 yuan;

unemployment insurance: 6111*1%=61 yuan, and the unit is 6111*2%=121 yuan;

industrial injury insurance: no individual, unit 6111*1%=61 yuan

maternity insurance: no individual, unit 6111*1%=61 yuan

provident fund: 6111*3.5%=211 yuan, 6111*3.5%=211 yuan.

therefore, the personal total is: 871 yuan, and the unit total is: 2131 yuan.

The calculated data may be different from the actual data, but the calculation method is as follows.