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Administrative Assistant III Salary in Saint Charles, IL

How much does an Administrative Assistant III make in Saint Charles, IL? (2025)

As of November 01, 2025, the average salary for an Administrative Assistant III in Saint Charles, IL is $64,713 per year, which breaks down to an hourly rate of $31.

However, an Administrative Assistant III's salary can vary significantly. Here’s a look at the typical salary range:

  • Top Earners (90th percentile): $78,941
  • Majority Range (25th-75th percentile): $58,154 to $72,160
  • Entry-Level (10th percentile): $52,182
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View as table View as graph 25% $58,154 10% $52,182 90% $78,941 75% $72,160 $64,713 50%(Median) Didn’t find job title? Click

Administrative Assistant III Salaries by Percentile

Annual
Salary		 Monthly
Pay		 Weekly
Pay		 Hourly
Wage
75th Percentile $72,160 $6,013 $1,388 $35
Average $64,713 $5,393 $1,244 $31
25th Percentile $58,154 $4,846 $1,118 $28
Check out Administrative Assistant III Job Openings in Saint Charles, IL
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Administrative Assistant III

Abacus Staffing - Deerfield, IL

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Key Factors That Influence Administrative Assistant III Salaries

An Administrative Assistant III's salary isn't a fixed number. It's shaped by several important factors. Below, we'll explore how your years of experience, geographic location, skills and company size can directly affect your earning potential.

How Experience Level Affects Administrative Assistant III Salaries?

Experience is a primary driver of an Administrative Assistant III's salary. As you build your skills and take on more complex tasks, your compensation generally increases. Here’s how the average salary grows at different career stages:

  • Entry-Level (less than 1 year): $60,954
  • Early Career (1-2 years): $61,443
  • Mid-Level (2-4 years): $62,715
  • Senior-Level (5-8 years): $64,671
  • Expert (over 8 years): $68,466
Levels Salary
Entry Level Administrative Assistant III $60,954
Intermediate Level Administrative Assistant III $61,443
Senior Level Administrative Assistant III $62,715
Specialist Level Administrative Assistant III $64,671
Expert Level Administrative Assistant III $68,466
$60,954 0 yr
$61,443 < 2 yrs
$62,715 2-4 yrs
$64,671 5-8 yrs
$68,466 > 8 yrs
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What Am I Worth?

Top Paying Cities for Administrative Assistant IIIs

Salaries can also vary between different cities, even within the same state. Major metropolitan areas or cities with a high demand for technicians often offer more competitive pay. Here are a few examples of average annual salaries in different Illinois cities:

  • Harwood Heights: $65,091
  • Bedford Park: $65,066
  • Evergreen Park: $65,040

What Skills Can Increase an Administrative Assistant III's Salary?

Demanded Skills for the Role:

  • Customer Service (Mentioned in 9.97% Job Postings): Customer service is the provision of service to customers before, during and after a purchase. The perception of success of such interactions is dependent on employees "who can adjust themselves to the personality of the guest". Customer service concerns the priority an organization assigns to customer service relative to components such as product innovation and pricing. In this sense, an organization that values good customer service may spend more money in training employees than the average organization or may proactively interview customers for feedback. From the point of view of an overall sales process engineering effort, customer service plays an important role in an organization's ability to generate income and revenue. From that perspective, customer service should be included as part of an overall approach to systematic improvement. One good customer service experience can change the entire perception a customer holds towards the organization.
  • Accounting (Mentioned in 2.93% Job Postings): Creating financial statements and reports based on the summary of financial and business transactions.
  • Purchasing (Mentioned in 1.24% Job Postings): Purchasing refers to a business or organization attempting to acquire goods or services to accomplish its goals. Although there are several organizations that attempt to set standards in the purchasing process, processes can vary greatly between organizations. Typically the word “purchasing” is not used interchangeably with the word “procurement”, since procurement typically includes expediting, supplier quality, and transportation and logistics (T&L) in addition to purchasing.
See More Skills
Skills Demand Percentage
Customer Service 9.97%
Accounting 2.93%
Purchasing 1.24%
What skills can make your compensation higher?
Mastering certain specialized skills can lead to a significant increase in pay. Here are examples of skills and the potential impact they can have on an Administrative Assistant III's salary.
  • Project Management: Can increase your salary by up to 10%.
  • Consulting: Can increase your salary by up to 9%.
  • Leadership: Can increase your salary by up to 8%.
Skill Salary Salary % Increase
Project Management
 $71,184
10%
Consulting
 $70,537
9%
Leadership
 $69,890
8%
Collaboration
 $69,243
7%
Innovation
 $69,243
7%
Analysis
 $67,948
5%
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Administrative Assistant III Salary: Hourly Rate, Weekly Pay, and Monthly Pay

Understanding how an Administrative Assistant III's annual salary breaks down can help with budgeting. Below, you can see the average hourly rate, weekly pay, and monthly pay for this role. Use the buttons to switch between different pay periods.

  • Yearly
  • Monthly
  • Weekly
  • Hourly
  • Table View
Last Updated on November 01, 2025
$58,154
Average $64,713/year
$72,160
$4,846
Average $5,393/month
$6,013
$1,118
Average $1,244/week
$1,388
$28
Average $31/hour
$35
Annual Salary Monthly Pay Weekly Pay Hourly Wage
75th Percentile $72,160 $6,013 $1,388 $35
Average $64,713 $5,393 $1,244 $31
25th Percentile $58,154 $4,846 $1,118 $28

Salaries of jobs related to Administrative Assistant III

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Cost of Living In Saint Charles, IL

Cost of Living in Saint Charles, IL is
11.8% Higher
than the National Average

Use Salary.com's Cost of Living Calculator to find out what income you need to maintain your standard of living in a different city and how much more or less money you need to budget for basic expenses.

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