Radiation Therapist
Also known as: Computed Tomography Simulation Therapist (CT Simulation Therapist), Dosimetrist, Radiation Oncology Registered Nurse (Radiation Oncology RN)
Radiation therapists position patients precisely and deliver targeted radiation treatments to cancer patients — operating linear accelerators, monitoring patient reactions, and ensuring each dose hits the tumor with millimeter accuracy. It's a high-tech role that combines medical precision with direct patient care during one of the most challenging times in people's lives.
Getting Started
How to Become a Radiation Therapist
You can start working as a radiation therapist in 4.3 years with $69k-$145k in training — that's longer and more expensive than most bachelor's-level health care careers, but the specialized nature justifies the investment.
Bachelor's Degree in Radiation Therapy
4 years · $45,000-$90,000
ARRT Radiation Therapy Certification
2 months · $225
State Licensure
2 months · $100-$300
Entry-Level Radiation Therapist
Ongoing
Advanced Specialty Certification
Ongoing · $300-$500
Ongoing Professional Development
Ongoing · $200-$400/year
Start
Year 4
Year 4
Bachelor's Degree in Radiation Therapy
4 years
ARRT Radiation Therapy Certification
2 months
Entry-Level Radiation Therapist
Ongoing
| Step | Duration | Cost | Details |
|---|---|---|---|
Bachelor's Degree in Radiation Therapy | 4 years | $45,000-$90,000 | Complete a JRCERT-accredited bachelor's degree in radiation therapy with coursework in anatomy, oncology, treatment planning, patient care, and integrated clinical rotations in radiation oncology. |
ARRT Radiation Therapy Certification | 2 months | $225 | Pass the ARRT Radiation Therapy exam to earn national certification after completing accredited radiation therapy education. |
State Licensure | 2 months | $100-$300 | Apply for state licensure where required after ARRT certification to begin independent radiation therapy practice. |
Entry-Level Radiation Therapist | Ongoing | — | Begin professional practice as a Radiation Therapist, delivering prescribed treatments, operating linear accelerators, and supporting patients through oncology care.Starting salary: $98,300/yr |
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Overview
What Does a Radiation Therapist Do?
Radiation therapists work in hospital oncology departments and outpatient cancer centers, spending their days in shielded treatment rooms with linear accelerators and CT simulators. Your work splits between technical precision — positioning patients, calibrating machines, delivering exact doses — and patient support during treatments that can last weeks or months.
- Position patients accurately for treatment according to their prescription.
- Administer prescribed doses of radiation to specific body parts using radiation therapy equipment according to established practices and standards.
- Follow radiation protection principles to keep patients, yourself, and others safe.
- Review the prescription, diagnosis, patient chart, and identification.
- Conduct most treatment sessions independently following the long-term treatment plan and under the general direction of the patient's physician.
- Enter data into the computer and set controls to operate or adjust equipment or regulate the radiation dosage.
- Check radiation therapy equipment to ensure it operates properly.
- Observe and reassure patients during treatment and report unusual reactions to the physician or turn the equipment off if unexpected adverse reactions occur.
Tasks from O*NET OnLine
Requirements
Licensing & Certification
You need both ARRT(T) certification and state licensure to work in most states — employers won't hire uncertified therapists because radiation equipment requires specialized training and safety protocols.
| Credential | Status | Cost | Renewal |
|---|---|---|---|
| ARRT(T) Certification | Required | $225 | Every 2 yr |
| State License | required_in_some_states | $50-$300 | 12-24 months |
ARRT(T) Certification (American Registry of Radiologic Technologists) — Primary national credential proving competence to safely deliver radiation therapy treatments
- Exam: 200 scored questions plus 30 unscored questions, computer-based; 3 attempts within 3 years of program completion
- Cost: $225 (exam and initial certification fee)
- Renewal: 24 continuing education credits per biennium and $65 renewal fee
State License (State radiation control or health department (varies by state)) — Required in many states to legally administer radiation therapy to patients
- Exam: Most states accept ARRT certification; some require additional state-specific exams
- Cost: Varies by state ($50-$300 typical)
- Renewal: Continuing education credits, active ARRT certification, and state renewal fee
Most states require both ARRT(T) certification and state licensure, with some states adding their own licensing exams beyond the national certification. A few states rely solely on employer requirements for ARRT certification without separate state licensing, but hospitals universally require the ARRT credential regardless of state law.
No interstate compact exists for radiation therapists. You will need a separate license in each state where you practice.
Compensation
Radiation Therapist Salary
At $102k, radiation therapists earn significantly more than ultrasound technicians ($89k) and much more than EKG technicians ($67k). The salary reflects both the specialized bachelor's-level training and the responsibility of operating complex radiation equipment safely.
$102k/yr
median annual salary
You'll spend $69k-$145k and 4.3 years to start earning $102k — that's 8-17 months to pay back your training costs, which is reasonable for a specialized bachelor's-level health care role.
Salaries vary by location and setting. Radiation Therapists in metropolitan areas and specialty practices typically earn more than the national median.
Source: Bureau of Labor Statistics, May 2024
HealthJob Analysis
Is It Worth It? 20-Year ROI
Earning $1,472k in 20-year net earnings and break-even at year 6, radiation therapy delivers solid ROI despite the high upfront cost. The strong returns come from the $102k salary — among the highest for bachelor's-level health care careers — combined with stable demand in cancer treatment. This beats most health care paths that require similar education investment.
Radiation Therapist ROI
Net earnings over 20 years
$1.5M
Pre-tax 20-year estimate after required education and training costs; taxes and living expenses excluded.
How the 20-year estimate is calculated
Radiation Therapist Career ROI (20-year net earnings)
Track how education costs and earnings typically accumulate from enrollment through year 20.
Cumulative net earnings (USD)
The full chart keeps 20-year context. The detail chart below zooms in on early pathway years.
Sources: BLS, Accreditor, AccreditorSee Sources and methods.
Early-years detail
Years 0-8
Years 0-8. Scaled to early-year values. Black markers show key checkpoints.
Quick answers
- Is becoming a Radiation Therapist financially worth it?Typical 20-year net estimate: $1.5M (pre-tax, living expenses excluded).
- How much does training cost for a Radiation Therapist?Estimated required education and licensing cost to become a Radiation Therapist: $68k (range used: $45k-$91k). Breakdown: Bachelor's Degree in Radiation Therapy: $68k; ARRT Radiation Therapy Certification: $225; State Licensure: $200.
- How long does it take to become a Radiation Therapist?Typical time to first paycheck is about 4.3 years. Typical time to enter the target Radiation Therapist role is about 4.3 years.
- How do you become a Radiation Therapist?See How to Become for pathway steps, timing, and credential requirements.
Detailed math
How 20-year net is built from each training and career phase.
| Phase | Time window | Gross earnings | Education/training cost | Net contribution | Sources |
|---|---|---|---|---|---|
Bachelor's Degree in Radiation Therapy Education | Years 0-3 (m0-m47) | $0 | -$67,500 | -$67,500 | |
ARRT Radiation Therapy Certification Training/Licensing | Year 4 (m50-m50) | $0 | -$225 | -$225 | |
State Licensure Training/Licensing | Year 4 (m52-m52) | $0 | -$200 | -$200 | |
Entry-Level Radiation Therapist Career | Years 4-19 (m52-m239) | $1,540,096 | $0 | $1,540,096 | |
Model reconciliation Reconciliation | Years 0-20 (m0-m239) | -$63 | $0 | -$63 | None |
| 20-year totals | $1,540,033 | -$67,925 | $1,472,108 | Matches 20-year ROI formula | |
Sources and methods
Sources
Assumptions
- Pathway sequence and timing follow the cited training and licensing pathway for this role.BLSBLS
- Earnings benchmarks come from cited occupation wage references.BLSBLS
- Education and training cost uses College Scorecard tuition and cited pathway fees when needed.Source unavailable
- Cost allocation follows a model rule: short completed steps post in completion year; longer tuition steps are spread across phase years.Model ruleBLSBLS
- Taxes and living expenses are excluded from this estimate.Model rule
Radiation therapy ranks in the top tier of bachelor's-level health care careers by ROI. It significantly outperforms careers like medical laboratory technician and matches or exceeds registered nurse returns in many markets.
Future-Proofing
Radiation Therapist Job Outlook (2024–2034)
Cancer rates are rising with an aging population, but radiation therapy growth is limited to just 1.2% because technology improvements let fewer therapists treat more patients. Hospitals are investing in more precise, faster machines that require the same number of certified operators.
10-Year Growth
1.2%
Little or no change
Current Employment
18,700
jobs nationwide
HealthJob Analysis
Will AI Replace Radiation Therapist?
AI is reshaping treatment planning but strengthening therapist roles in delivery and patient care. Treatment planning software like RayStation and Eclipse now use AI to auto-contour tumors and optimize radiation doses, reducing planning time from hours to minutes. However, therapists remain essential for patient positioning, operating linear accelerators, monitoring real-time patient reactions, and providing emotional support — tasks requiring human judgment, dexterity, and empathy that AI cannot replicate.
AI auto-contours tumors and optimizes treatment plans; therapist positions patients, delivers treatment, and monitors reactions.
ASTRO: AI in Radiation Oncology White Paper · BLS: Radiation Therapists +1% (2023-2033)
Based on evidence-based AI impact methodology
Explore
Careers Similar to Radiation Therapist
These careers offer alternative paths into medical imaging and diagnostic technology with shorter training times and lower education costs.
| Occupation | Median Salary | Training Time |
|---|---|---|
| EKG/ECG Technician | $67k/yr | 4 mo |
| Ultrasound Technician | $89k/yr | 2.3 yr |
| Diagnostic Medical Sonographer | $89k/yr | 2.3 yr |
Learn More
Related Guides
Occupational Therapist Salary
Occupational therapy offers competitive salaries and growth opportunities in health care. Learn more about how much you can make as an occupation therapist.
Physical TherapistPhysical Therapist Salary
Physical therapists in the United States earn an average annual salary of $100,440.
Recreational TherapistRecreational Therapist Salary
Recreational therapists earn an average of $60,910 annually.
Sources & Data
These references are used to build salary, training-path, and job-outlook estimates shown on this page.
- •Bureau of Labor Statistics, Occupational Outlook Handbook
- •O*NET OnLine
- •ARRT
- •ARRT
- •HealthJob AI Impact Analysis
- •BLS Occupational Outlook Handbook - Radiation Therapists
- •American Registry of Radiologic Technologists
- •American Registry of Radiologic Technologists
Data last refreshed: April 2026 • Page generated from structured schema