As of April 01, 2026, the average salary for a Mainframe Developer II in Illinois is $84,490 per year, which breaks down to an hourly rate of $41.
However, a Mainframe Developer II's salary can vary significantly. Here’s a look at the typical salary range:
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Mainframe Developer II Salaries by Percentile
| Annual Salary |
Monthly Pay |
Weekly Pay |
Hourly Wage |
|
| 75th Percentile | $91,290 | $7,608 | $1,756 | $44 |
| Average | $84,490 | $7,041 | $1,625 | $41 |
| 25th Percentile | $76,290 | $6,358 | $1,467 | $37 |
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A Mainframe Developer II'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 Mainframe Developer II'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:
| Levels | Salary |
|---|---|
| Entry Level Mainframe Developer II | $81,812 |
| Intermediate Level Mainframe Developer II | $82,056 |
| Senior Level Mainframe Developer II | $84,999 |
| Specialist Level Mainframe Developer II | $87,853 |
| Expert Level Mainframe Developer II | $88,057 |
What Am I Worth?
Your salary can change significantly depending on where you work. States with a higher cost of living and strong industrial sectors often pay more to attract Mainframe Developer IIs. For example, consider the average annual salaries in these key locations:
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:
Understanding how a Mainframe Developer II'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.
| Annual Salary | Monthly Pay | Weekly Pay | Hourly Wage | |
|---|---|---|---|---|
| 75th Percentile | $91,290 | $7,608 | $1,756 | $44 |
| Average | $84,490 | $7,041 | $1,625 | $41 |
| 25th Percentile | $76,290 | $6,358 | $1,467 | $37 |
Promotions are the fastest way to increase your earnings. As a Mainframe Developer II, you have the following paths for advancement. The table below compares the salary raises for common next-step roles. By comparing these figures, you can choose the career path that best meets your financial goals.
| Next Step Role | Estimate Salary | Projected Raise |
|---|---|---|
| Application Programmer Analyst III | $125,000 | 48% |
| Software Research and Design Architect III | $131,200 | 55% |
| Backend Applications Developer III | $127,600 | 51% |
| Full Stack Engineer Senior | $130,900 | 55% |
Ready to take the next step in your career? Browse thousands of current Mainframe Developer II job openings on our job board. Use the search bar below to find your perfect match.
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