In Nantong, Jiangsu, the differences between the social security base of 16,600 yuan and 5,000 yuan are as follows:

1. Payment amount:

• Endowment insurance: If the base is 16,600 yuan, the individual payment amount = ​
  ×8%=
  yuan; if the base is 5,000 yuan, the individual payment amount = ​
  ×8%=
  yuan. The unit payment amounts are respectively ​
  ×20%=
  yuan and ​
  ×20%=
  yuan.

• Medical insurance: For a base of 16,600 yuan, the individual payment amount = ​
  ×2%=
  yuan; for a base of 5,000 yuan, the individual payment amount = ​
  ×2%=
  yuan. The unit payment amounts are respectively ​
  ×10%=
  yuan and ​
  ×10%=
  yuan.

• Unemployment insurance: When the base is 16,600 yuan, the individual payment amount = ​
  ×0.5%=
  yuan; when the base is 5,000 yuan, the individual payment amount = ​
  ×0.5%=
  yuan. The unit payment amounts are respectively ​
  ×1%=
  yuan and ​
  ×1%=
  yuan.

2. Pension treatment: The pension calculation is related to the payment base. Generally, the higher the payment base, the higher the pension that can be received after retirement. If the payment base is 16,600 yuan, the amount accumulated in the individual pension account will be more, and the pension received in the future will be relatively higher compared to a base of 5,000 yuan.

3. Medical insurance account allocation: The amount allocated to the medical insurance personal account is also related to the payment base. With a base of 16,600 yuan, more funds will be allocated to the personal account, which can be used for medical expenses such as seeing a doctor and buying medicine, while a base of 5,000 yuan will result in a relatively smaller allocation amount.

In conclusion, a higher social security base in Nantong, such as 16,600 yuan, means higher current payment amounts but also potentially better pension and medical insurance treatment in the future compared to a lower base of 5,000 yuan. It is recommended that individuals choose an appropriate payment base according to their actual economic situation and future expectations.

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