Salaries › Computer Systems Analyst › Illinois
Computer Systems Analyst Salary in Illinois (2026)
$48.83 per hour · take-home ≈ $75,257/year ($6,271/month) for a single filer
Computer Systems Analyst pay range in Illinois
| Percentile | Annual wage | Meaning |
| 10th percentile (entry) | $60,770 | Lowest-paid 10% earn less than this |
| 25th percentile | $80,350 | A quarter earn less |
| Median (50th) | $101,570 | Half earn more, half earn less |
| 75th percentile | $128,030 | Top quarter starts here |
| 90th percentile (top) | $144,790 | Highest-paid 10% earn more than this |
BLS reports 20,610 Computer Systems Analyst jobs in Illinois (occupation code 15-1211, “Computer Systems Analysts”).
Gross vs. take-home in Illinois
A median Computer Systems Analyst salary of $101,570 doesn’t all reach your bank account. After federal income tax, Social Security, and Medicare, plus Illinois state income tax, a single filer keeps about $75,257 — an effective tax rate of 25.9%.
| Gross (median) | $101,570 |
| Federal income tax | −$13,515 |
| Social Security + Medicare | −$7,770 |
| Illinois state income tax | −$5,028 |
| Take-home (annual) | $75,257 |
| Take-home (monthly) | $6,271 |
Want your exact numbers — married, 401(k), different salary? Use the free Illinois paycheck calculator on PaycheckTally.
Frequently asked questions
- How much does a Computer Systems Analyst make in Illinois?
- The median Computer Systems Analyst salary in Illinois is $101,570 per year ($48.83 per hour) according to the latest BLS data. The middle 50% earn between $80,350 and $128,030.
- What is the take-home pay for a Computer Systems Analyst in Illinois?
- On the median salary of $101,570, a single filer in Illinois takes home about $75,257 per year ($6,271 per month) after federal tax, FICA, and state income tax — an effective tax rate of 25.9%.
- How many Computer Systems Analyst jobs are there in Illinois?
- BLS counts 20,610 Computer Systems Analyst jobs in Illinois in the latest survey (May 2025).
Top-paying states for Computer Systems Analysts
Other salaries in Illinois
Sources and methodology
Wage and employment figures: BLS OEWS May 2025 (state file, released April 2026) — the U.S. Bureau of Labor Statistics Occupational Employment and Wage Statistics survey, the most authoritative public salary dataset. Take-home estimate: 2026 federal brackets, FICA, and verified Illinois state tax rules (single filer, standard deduction, no credits or local taxes). Estimates only — not financial advice.
- BLS OEWS — official occupational wage data.
- PaycheckTally — interactive 2026 take-home calculator for Illinois.