- The Core Fee Structure: $550 Total
- What the $550 Actually Covers
- Costs Outside the ABOHN Fee Schedule
- Budgeting Your Preparation Spend
- The Cost of Not Passing the First Time
- Long-Term Costs: Maintaining the Credential
- Getting Your Employer to Pay
- A Cost-Aware Preparation Timeline
- Weighing Cost Against Career Value
- Frequently Asked Questions
- The ABOHN fee is $150 for the application plus $400 for the examination, totaling $550.
- The exam has 160 multiple-choice questions, 135 scored and 25 pretest, in a 3-hour closed-book sitting.
- You can test at an ASC center or by MonitorEDU live remote delivery, so travel may not be required.
- Maintaining the credential adds an annual $150 recertification fee plus 50 related CNE hours every five years.
The Core Fee Structure: $550 Total
The Certified Occupational Health Nurse credential is awarded by the American Board for Occupational Health Nurses, Inc. (ABOHN), and its published pricing is refreshingly simple compared with many professional certifications. There are two line items, and together they make up the entire mandatory cost of sitting for the exam.
| Fee Component | Amount | What It Covers |
|---|---|---|
| Application fee | $150 | ABOHN review of your eligibility, including RN licensure and occupational-health practice hours |
| Examination fee | $400 | Your exam attempt, delivered through Assessment Systems Corporation (ASC) |
| Total | $550 | Application plus one examination sitting |
This page is the baseline for everything else in this guide. If you want the broader context on whether the investment pays off, see our analysis in Is the COHN Certification Worth It? Complete ROI Analysis 2026, and for the earnings side of the equation, the COHN Salary Guide 2026.
What the $550 Actually Covers
The Application Fee: Eligibility Review
The $150 application fee pays for ABOHN to verify that you meet the eligibility standard. For the COHN, that means an RN license (or an international equivalent) plus 3,000 hours of occupational-health practice within the previous five years. Certain education alternatives are available, but they require approval, so budget extra lead time if your path is not the standard one. A full walkthrough of who qualifies is in COHN Requirements 2026: Eligibility, Prerequisites & How to Qualify.
The Examination Fee: One Sitting, Two Delivery Options
The $400 examination fee covers the exam itself. ABOHN delivers the COHN through Assessment Systems Corporation, and candidates can test either at a physical testing center or through MonitorEDU live remote delivery. That choice matters financially: remote proctoring can eliminate fuel, parking, lodging, or time-off costs tied to driving to a center. The tradeoff is that you need a quiet, compliant testing space and a reliable computer setup at home or work.
The exam itself is 160 multiple-choice questions over three hours. Of those, 135 are scored and 25 are pretest items that do not count toward your result, though you will not know which are which. It is a closed-book exam. Scheduling windows and deadlines are covered in COHN Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Costs Outside the ABOHN Fee Schedule
The $550 is the fee ABOHN charges. Your real out-of-pocket number depends on several things the fee schedule does not capture:
- Preparation materials: Study resources, practice questions, and any review course you choose. These are optional but are usually the largest discretionary spend.
- Time away from work: If you test at a center, you may take a partial or full day of leave. Remote delivery can reduce this.
- Travel to a center: Mileage, parking, or lodging if the nearest ASC site is not close.
- Technology for remote testing: A compliant computer, webcam, and stable internet if you choose MonitorEDU.
- Documentation costs: Any fees your employer or institution charges to verify practice hours or issue letters.
None of these are ABOHN charges, and none are required. They are simply the practical costs that sit around the exam. Plan for them in your budget so the $550 headline number does not surprise you.
Budgeting Your Preparation Spend
Because the COHN is a niche, practice-based credential, candidates tend to be working occupational health nurses who already hold substantial on-the-job knowledge. That shapes how you should spend. Rather than buying everything, allocate money where your gaps are largest. The exam's official scored-item allocation is 72, 40, and 23 items across its three domains (these are item counts, not percentage labels), so spending should loosely track where the points are.
Domain 1: Clinical Practice and Case Management (72 scored items)
The heaviest domain by a wide margin, so it deserves the largest share of your preparation budget and time.
- Work-related injury and illness assessment, management, and return-to-work planning
- Case management of occupational and non-occupational conditions
- Health surveillance and monitoring tied to workplace exposures
Domain 2: Risk and Compliance (40 scored items)
Regulatory and risk-focused content. If you work in a setting where compliance is handled by someone else, this is where unfamiliar material tends to hide.
- Occupational safety and health regulatory frameworks
- Workers' compensation and reporting obligations
- Hazard identification and exposure risk management
Domain 3: Program Management and Quality Assurance (23 scored items)
The smallest domain, but often the least familiar to nurses who spend most of their time in direct clinical care.
- Planning, implementing, and evaluating occupational health programs
- Quality measures and program outcomes
- Budgeting, resources, and stakeholder communication
For a deeper look at what each area tests, read COHN Exam Domains 2026: Complete Guide to All 3 Content Areas. If you want a structured plan rather than assembling resources yourself, the COHN Study Guide 2026: How to Pass on Your First Attempt lays out a path, and our COHN Cheat Sheet 2026 gives you a quick-reference review.
The Cost of Not Passing the First Time
The single biggest avoidable cost in the COHN process is a failed attempt. A repeat sitting means paying exam-related fees again, plus the time and mental energy of re-preparing. I am not going to quote a retake fee here, because the retake pricing and policy are set by ABOHN and can change. Check the current fees page and the candidate handbook for the exact amount and any waiting-period rules before you plan for a second attempt.
What you can control is the probability of needing one. The exam uses an Angoff-based passing standard, which means the cut score is set by expert judgment about what a minimally competent candidate should know rather than by curving against other test-takers. Because of that, your goal is mastery of the content, not outperforming a cohort. For more on how the standard works, see COHN Passing Score 2026: Exactly What You Need to Pass.
A Note on Published Pass Rates
ABOHN's certification statistics page reports a 65% figure for 2025 but also lists 57/85, and that discrepancy has not been resolved. Because of that, treat any single pass-rate number with caution and do not build a cost model around it. We discuss what the data does and does not support in COHN Pass Rate 2026: What the Data Shows, and the difficulty question in How Hard Is the COHN Exam? Complete Difficulty Guide 2026.
Key Takeaway
Think of preparation spending as insurance against a second exam fee. A modest, targeted investment in practice questions for your weakest domain usually costs far less than a repeat attempt plus the delay in your credential.
Long-Term Costs: Maintaining the Credential
The $550 gets you certified, but it is not the last payment. COHN certification runs on a five-year recertification cycle, and ABOHN lists an annual maintenance/recertification fee of $150. Over a five-year cycle, that recurring fee becomes a meaningful part of the true lifetime cost, so it belongs in your planning from day one.
| Cost Category | Amount / Requirement | Timing |
|---|---|---|
| Application + exam | $550 total | One time, at initial certification |
| Annual maintenance/recertification fee | $150 | Annually |
| Active RN status | Maintain current licensure | Throughout the cycle |
| Practice hours | 3,000 hours | Across the five-year cycle |
| Related CNE hours | 50 hours | Across the five-year cycle |
The 50 CNE hours must be related to occupational health, so factor in the cost of continuing education. Many of those hours can come from employer-sponsored programs, conferences, or professional association offerings, which is another reason to ask about educational benefits (see below). Confirm the exact recertification requirements on ABOHN's maintenance and recertification page, as the details can be updated.
Getting Your Employer to Pay
Occupational health nurses are often employed by organizations that benefit directly from a certified nurse on staff, which makes employer reimbursement unusually realistic for this credential. The people most likely to fund it include corporate employers, manufacturers, hospitals with employee health departments, government agencies, and occupational medicine clinics. You can explore the kinds of roles that value the credential in COHN Jobs.
To make a persuasive request, frame it as a business case rather than a personal perk:
- Tie it to compliance and risk: Certified nurses strengthen the organization's regulatory and case management capability, the same content covered in Domains 1 and 2.
- Itemize the ask: Present the $150 application and $400 exam fees, plus any prep materials, as a single clear request.
- Offer something in return: Some employers will cover costs in exchange for a commitment to stay for a set period. Read any agreement carefully before signing.
- Ask about the long tail: Request coverage of the annual $150 fee and CNE costs, not just the initial exam.
A Cost-Aware Preparation Timeline
Preparation is the one place where generic study habits matter, so here is a single timeline tied directly to the COHN's domains and the money you spend. The order reflects where the scored items sit: front-load the heaviest content so any need for extra paid help surfaces early.
Diagnose and Start with Domain 1
- Take a baseline practice test to locate gaps before buying anything else
- Begin Clinical Practice and Case Management, the 72-item domain
- Confirm your eligibility paperwork and practice-hour documentation
Finish Domain 1, Open Domain 2
- Review case management and return-to-work scenarios
- Start Risk and Compliance, focusing on regulatory frameworks you rarely use
Domain 3 and Application Timing
- Cover Program Management and Quality Assurance
- Submit your application and pay the fees so scheduling is not delayed
Full-Length Practice and Scheduling
- Practice under 160-question, three-hour conditions, closed-book
- Choose center versus MonitorEDU remote delivery and book your sitting
You can run realistic timed practice on the main site at our COHN practice test platform, which helps you decide whether you need paid supplemental help or are ready to sit.
Weighing Cost Against Career Value
At $550 for the exam plus $150 each year to maintain it, the COHN is a moderate investment compared with many advanced healthcare credentials. Whether it pays back depends on your role, your employer, and your career goals, which is why we cover that question separately rather than guessing at figures here. I will not quote salary numbers in this article because pay varies widely by region, setting, and experience; the COHN Salary Guide 2026 examines earnings in context.
If you are still confirming the basics of the credential, these explainers can help: COHN Certification, What Is COHN Certification?, and COHN Training. For a structured way to test your readiness before you commit funds, try the practice exams on our main site.
Key Takeaway
Budget for the full lifecycle, not just the exam: $550 to get certified, $150 annually to maintain, 50 CNE hours per cycle, and whatever you choose to spend on preparation. Seek employer funding for all of it.
Frequently Asked Questions
The published ABOHN fees are a $150 application fee and a $400 examination fee, for a total of $550. Optional costs such as study materials, travel to a testing center, or time off work are separate and depend on your choices.
Not necessarily. The exam is delivered through Assessment Systems Corporation (ASC), with options for a testing center or MonitorEDU live remote delivery. Remote delivery can reduce travel costs, though you need a compliant testing environment and equipment.
Yes. ABOHN lists an annual maintenance/recertification fee of $150. Recertification occurs on a five-year cycle and requires active RN status, 3,000 practice hours, and 50 related CNE hours. Confirm current details on ABOHN's recertification page.
The exam has 160 multiple-choice questions, of which 135 are scored and 25 are pretest, delivered over three hours in a closed-book format. The three domains are Clinical Practice and Case Management, Risk and Compliance, and Program Management and Quality Assurance, with scored-item allocations of 72, 40, and 23.
Many occupational health employers, including manufacturers, hospital employee health departments, and occupational medicine clinics, have a stake in certified nurses and may reimburse fees. Ask HR or your manager about education benefits, and clarify whether payment is upfront or after you pass.