Assistant Firm Administrator Salary in Illinois

How much does an Assistant Firm Administrator make in Illinois? As of September 01, 2026, the average salary for an Assistant Firm Administrator in Illinois is $47,306 per year, which breaks down to an hourly rate of $23.

However, an Assistant Firm Administrator's salary can vary significantly. Here's a look at the typical salary range:

  • Top Earners (90th percentile): $59,589
  • Majority Range (25th-75th percentile): $42,696 to $53,735
  • Entry-Level (10th percentile): $38,499

Key Factors That Influence Assistant Firm Administrator Salaries

An Assistant Firm Administrator'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 and company size can directly affect your earning potential.

How Experience Level Affects Assistant Firm Administrator Salaries?

Experience is a primary driver of an Assistant Firm Administrator'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): $45,967
  • Early Career (1-2 years): $51,716
  • Mid-Level (2-4 years): $59,543
  • Senior-Level (5-8 years): $79,290
  • Expert (over 8 years): $91,046
Job RoleYears of ExperienceAverage Salary
Assistant Firm Administrator less than 1 year $45,967
Sales Assistant II 1-2 years $51,716
Sales Assistant III 2-4 years $59,543
Sales Assistant Team Leader 5-8 years $79,290
Sales Support Supervisor over 8 years $91,046

Top Paying Cities for Assistant Firm Administrator

Salaries can also vary between different cities. 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 U.S. cities:

  • Effingham: $43,607
  • Saint Peter: $43,547
  • Salem: $43,713

Assistant Firm Administrator Salary by Industry: Top Paying Sectors

For Assistant Firm Administrator roles, the industry you choose can affect earning potential by as much as 55% (the gap between the highest and lowest paying industries). Data shows that the Biotechnology and Financial Services sectors offer the strongest compensation, at 20% above the average. In contrast, Assistant Firm Administrator positions in Hospitality & Leisure or Edu., Gov't. & Nonprofit typically offer lower base pay, as these industries often view Assistant Firm Administrator as a support function rather than a direct revenue driver.

The top paying industries for an Assistant Firm Administrator

Industry Sector Average Annual Salary Average Hourly Rate Pay vs.Avg
Biotechnology $56,767 $27.0 20%
Financial Services $56,767 $27.0 20%
Pharmaceuticals $56,767 $27.0 20%
Software & Networking $56,767 $27.0 20%
Telecom $56,767 $27.0 20%

Assistant Firm Administrator Salary: Hourly Rate, Weekly Pay, and Monthly Pay

Understanding how an Assistant Firm Administrator'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 September 01, 2026
$42,696
Average $47,306/year
$53,735
$3,558
Average $3,942/month
$4,478
$821
Average $910/week
$1,033
$21
Average $23/hour
$26
Annual Salary Monthly Pay Weekly Pay Hourly Wage
75th Percentile $53,735 $4,478 $1,033 $26
Average $47,306 $3,942 $910 $23
25th Percentile $42,696 $3,558 $821 $21

Find Your Next Assistant Firm Administrator Job

Ready to take the next step in your career? Browse thousands of current Assistant Firm Administrator job openings on our job board. Use the search bar below to find your perfect match.

  • Accolade Healthcare of Savoy | Savoy, IL

    Accolade Healthcare of Savoy | Savoy, IL

    Job Description. Job Description. Assistant Administrator. Job Description. About Us. At Accolade Healthcare, we put an emphasis on the satisfaction of our... more

    5 Days Ago

  • Jobot | Glen Ellyn, IL

    Jobot | Glen Ellyn, IL

    Maintenance Technician Opportunity / $28- $40 Per Hour Overtime / Great Benefits and Growth OpportunityThis Jobot Job is hosted by:Jack CampbellAre you a f... more

    6 Days Ago

  • Shine Window Cleaning & Holiday Lighting | Morton, IL

    Shine Window Cleaning & Holiday Lighting | Morton, IL

    Responsive recruiterBenefits:Competitive salaryFlexible scheduleFree uniformsTraining & developmentJob Title: Office Administrator and Dispatch AssistantBe... more

    6 Days Ago

  • Conagra Brands | Chicago, IL

    Conagra Brands | Chicago, IL

    Job Summary:The Executive Vice President, General Counsel, and Corporate Secretary of Conagra Brands, Inc. is seeking an Executive Assistant and Legal Oper... more

    6 Days Ago

  • Correa Law | Chicago, IL

    Correa Law | Chicago, IL

    Job Description. Job Description. We are a growing, fast-paced 3-attorney law firm with an additional 7 people for support staff. We are based in the quiet... more

    3 Days Ago

  • ES Ring Management | COSTA MESA, CA

    ES Ring Management | COSTA MESA, CA

    Join E&S Ring – A Leader in Residential Property Management. At E&S Ring Management, we manage apartment communities in some of California’s most sought-af... more

    3 Days Ago

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