As of August 01, 2026, the average salary for a Custodian III in Sumner, IL is $42,100 per year, which breaks down to an hourly rate of $20.
However, a Custodian III's salary can vary significantly. Here’s a look at the typical salary range:
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A Custodian 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, and company size can directly affect your earning potential.
Experience is a primary driver of a Custodian 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:
| Job Role | Years of Experience | Average Salary |
|---|---|---|
| Custodian I | 0-1 years | $33,932 |
| Custodian II | 1-3 years | $37,960 |
| Custodian III | 3-5 years | $42,045 |
| Custodial Supervisor | 5+ years | $45,254 |
| Custodial Manager | 5+ years | $71,026 |
What Am I Worth?
Custodian III salary potential scales significantly with company size. Data shows that Enterprise companies (5,000+ employees) pay the highest average salary at around $47,129. While startup companies pay approximate $39,870.
| Company Size | Employees | Average Salary |
|---|---|---|
| Startup | 1~50 | $39,870 |
| Growth Stage | 51~500 | $42,167 |
| Established | 501~5000 | $45,511 |
| Enterprise | 5000+ | $47,129 |
For Custodian III roles, the industry you choose can affect earning potential by as much as 40% (the gap between the highest and lowest paying industries). Data shows that the Aerospace & Defense and Business Services sectors offer the strongest compensation, at 20% above the average. In contrast, Custodian positions in Biotechnology or Transportation typically offer lower base pay, as these industries often view Custodian III as a support function rather than a direct revenue driver.
| Industry Sector | Average Annual Salary | Average Hourly Rate | Pay vs.Avg |
|---|---|---|---|
| Aerospace & Defense | $50,520 | $24.0 | 20% |
Understanding how a Custodian 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.
Last Updated on August 01, 2026For a Custodian III, the most direct path to higher earnings is advancing to the Custodial Supervisor role. This promotion typically comes with a significant pay increase, bringing the average annual salary to $45,300 - a projected growth of 8% over your current level.
Ready to take the next step in your career? Browse thousands of current Custodian III job openings on our job board. Use the search bar below to find your perfect match.
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