In 2025, the upper limit of the social security contribution base in Lishui, Zhejiang is 17,950 yuan, and the lower limit is 3,590 yuan. A social security base of 11,400 yuan falls within this range and is considered a middle - to - upper - level standard. Here's a breakdown:

1. Calculation principle: The social security contribution base is determined based on the average wage of employees in the previous year. If an employee's income is between 60% and 300% of the local average wage, the actual income is used as the contribution base. A base of 11,400 yuan may be the actual average monthly wage of the employee in the previous year.

2. Proportion of local average wage: Although the specific average wage data for Lishui is not given, considering the upper and lower limits of the contribution base, 11,400 yuan is significantly higher than the lower limit of 3,590 yuan. If we assume the local average wage is ​
   x
   , and the lower limit is 60% of ​
   x
   (i.e., ​
   0.6x=
   , then ​
   x≈
   yuan), 11,400 yuan is nearly twice the assumed average wage, indicating it is at a relatively high level.

3. Contribution amount: With a base of 11,400 yuan, the contribution amounts for different insurances are as follows:

• Basic 养老保险: The unit contribution rate is 14%, so the unit pays ​
  ×14%=
  yuan; the individual contribution rate is 8%, so the individual pays ​
  ×8%=
  yuan.

• Basic 医疗保险: The unit contribution rate is 6.9%, so the unit pays ​
  ×6.9%=786.6
  yuan; the individual contribution rate is 2.0%, so the individual pays ​
  ×2.0%=
  yuan.

• 失业保险: The unit contribution rate is 0.5%, so the unit pays ​
  ×0.5%=
  yuan; the individual contribution rate is 0.5%, so the individual pays ​
  ×0.5%=
  yuan.

• 工伤保险: The unit contribution rate is 0.45%, so the unit pays ​
  ×0.45%=51.3
  yuan; individuals do not contribute.

• 残保金: The unit contribution rate is 1.5%, so the unit pays ​
  ×1.5%=
  yuan; individuals do not contribute.

In general, a social security base of 11,400 yuan in Lishui, Zhejiang, means that employees and employers need to pay relatively high social security contributions, which will also bring relatively higher benefits in the future, such as higher pension amounts and better medical insurance reimbursement. However, specific benefits are also affected by other factors such as contribution years.