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What is the difference between the first, second and third grades of social security in Chongqing?

1. The first grade: applicable to urban workers and enterprise retirees, the contribution ratio is 20%, and the contribution base is 60% of the local minimum wage standard.

2. The second tier: applicable to enterprise workers and flexibly employed persons, the contribution rate is 12%, and the contribution base is 40% of the local minimum wage standard.

3. Third class: applicable to individual businessmen and freelancers, the contribution ratio is 10%, and the contribution base is 20% of the local minimum wage standard.