Last updated: 2025 BLS data · Page refreshed:
How does Radiation Therapists salary grow from entry-level to senior in Illinois? State salary progression based on 2025 BLS data.
30% career growth potentialData: BLS OEWS 2025 • Illinois salary data • Updated 2026-05-19
The salary range for Radiation Therapists in Illinois spans from $96,340 at entry-level to $124,850 at senior level — a difference of $28,510 per year.
Senior Radiation Therapistss in Illinois earn $28,510 more per year than entry-level professionals.
Complete percentile breakdown showing how Radiation Therapists salary increases with experience in Illinois, from entry-level (10th percentile) to senior (90th percentile).
| Experience Level | Percentile | Annual Salary | Monthly | Hourly |
|---|---|---|---|---|
| Entry-Level | P10 | $96,340 | $8,028 | $46.32 |
| Early Career | P25 | $107,380 | $8,948 | $51.62 |
| Mid-Career | Median | $124,600 | $10,383 | $59.90 |
| Experienced | P75 | $124,850 | $10,404 | $60.02 |
| Senior / Expert | P90 | $124,850 | $10,404 | $60.02 |
Radiation Therapists in Illinois has a moderate salary progression with a 30% growth from entry-level ($96,340) to senior ($124,850). While the growth potential is steady, professionals looking to maximize earnings may benefit from specialization, advanced certifications, or gaining experience in higher-paying states. The gap between median ($124,600) and P90 ($124,850) shows there is still room for meaningful growth beyond mid-career.
Where does Illinois rank for Radiation Therapists senior-level salaries? Compare Illinois's P90 pay to other top-paying states.
Entry-level Radiation Therapistss (10th percentile) earn approximately $96,340 per year, or $8,028 per month. Early-career professionals (25th percentile) earn around $107,380. Based on 2025 BLS OEWS data across all U.S. states.
Senior Radiation Therapistss (90th percentile) earn approximately $124,850 per year. Experienced professionals (75th percentile) earn around $124,850. This represents a career premium of 30% over entry-level pay.
The career salary growth potential for Radiation Therapistss is 30%. Entry-level professionals start at $96,340, while senior-level can earn up to $124,850 — a difference of $28,510 per year.
The highest-paying state for senior Radiation Therapistss is Illinois, where 90th-percentile salaries reach $124,850 per year. See the full state-by-state comparison above.
We use BLS Occupational Employment and Wage Statistics (OEWS) 2025 data. The 10th percentile (P10) approximates entry-level pay — the salary that 90% of workers earn more than. The 90th percentile (P90) approximates senior/expert-level pay — only 10% of workers earn above this threshold. National averages are computed across all reporting U.S. states.
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Salary percentile data for Illinois from the U.S. Bureau of Labor Statistics (BLS) Occupational Employment and Wage Statistics (OEWS), May 2025. P10 approximates entry-level compensation; P90 approximates senior/expert-level compensation. State averages differ from national averages due to regional variations in cost of living, demand, and workforce composition. Actual salaries vary based on employer, experience, education, certifications, and specific location within Illinois.
Our Methodology · Data Sources · Source: BLS OEWS