OHC Exam Dates 2026: Testing Windows, Deadlines & Scheduling

Why There Is No Fixed OHC Exam Calendar

Candidates searching for "OHC exam dates 2026" often expect a published schedule of testing windows, like the seasonal exam periods used by some professional credentials. For the Occupational Hearing Conservationist certification issued by the Council for Accreditation in Occupational Hearing Conservation (CAOHC), that is not how it works. The initial written exam is tied to an approved training course, and the course is the event that sets your date.

In practice, your "exam date" is whichever day your Course Director schedules the written exam as part of, or following, your approved course. Because courses are offered by different approved providers at different times and in different formats, the calendar is effectively as many calendars as there are courses. Your job is not to hunt for a national deadline but to find a course that fits your schedule and understand the sequence of requirements that must be met before and after it.

How Scheduling Actually Works Through the Course Director

CAOHC administers certification through approved Course Directors, and the current administration rules are laid out in the Course Director Policies and Procedures Manual (revised November 2025). Examinations are delivered through the CAOHC Learning Center, with the Course Director or an approved proctor handling administration. That has several practical consequences for anyone trying to pin down a date.

• Tuition and registration go through the Course Director. You register for the course with the provider running it, not with a central exam scheduler. Fees are set at the course level, so see OHC Certification Cost 2026: Complete Pricing Breakdown for how to think about budgeting.
• Proctoring is part of administration. The Course Director or an approved proctor oversees the written exam, which means your test slot depends on their availability.
• Retakes are also arranged through the Course Director. There may be proctoring fees attached, so ask about them up front.

The takeaway: your first scheduling task is to ask any prospective course provider three questions. When does the course run? When is the written exam offered relative to the course? And what are the costs for proctoring if you need a retake?

The Course-to-Exam Timeline

There are no course-enrollment prerequisites for the Occupational Hearing Conservationist certification, which keeps the front end of the timeline simple. (For a fuller breakdown of who can take the course, see OHC Requirements 2026: Eligibility, Prerequisites & How to Qualify.) Certification itself, however, requires three distinct components, and all three must be completed:

1. A minimum 20-hour approved course.
2. Satisfactory completion of the audiometric practicum and the hearing-protection-fitting practicum.
3. Passing the written exam.

Notice what is easy to confuse here: the 20 hours refer to course instruction time, not the length of the exam. The initial written exam has its own 75-minute timer. Candidates sometimes conflate the two, especially when a provider compresses the course into consecutive days and the exam falls at the end.

Because the practicums and the written exam are separate requirements, passing the written test alone does not complete certification. When you plan your calendar, build in time for all three, and confirm with your provider how the practicums are scheduled relative to the exam.

What to Expect When the Exam Window Opens

Knowing the format helps you choose a sensible date. The initial written exam is four-option, single-best-answer multiple choice with a 70% minimum to pass, available in English or Spanish. The timer is 75 minutes and cannot be paused, though questions can be flagged and revisited within the window. The official instructions are published by CAOHC in its certification exam instructions document.

Since the timer cannot be paused, your date should be one where you will not be interrupted. Choose a slot when you can sit uninterrupted for the full window, in a location with reliable technology if your administration is online. For a sense of how demanding the test is once you are seated, see How Hard Is the OHC Exam? Complete Difficulty Guide 2026 and OHC Passing Score 2026: Exactly What You Need to Pass.

What the exam draws on

The handbook's eleven headings function as the exam blueprint, but CAOHC omits percentage weights, so there is no supported "highest-weight" domain. That matters for scheduling: you cannot shortcut preparation by focusing on a single area, and your date should allow time to cover all eleven. A full walkthrough lives in OHC Exam Domains 2026: Complete Guide to All 11 Content Areas.

Retake Deadlines: The 30-Day Rule and Three Attempts

The most date-sensitive rule in the entire process involves retakes. CAOHC allows a maximum of three attempts at the initial written exam, and a retake must be arranged with your Course Director within 30 days of the preceding attempt. That 30-day clock is the closest thing the Occupational Hearing Conservationist pathway has to a hard deadline during initial certification.

A smart approach is to treat attempt one as a real attempt, not a practice run. Because you have only three, burning one to "see what it looks like" wastes a third of your allotment. Instead, use a full-length practice resource first; the OHC practice tests are built for exactly that kind of dry run. For what the numbers say about outcomes, see OHC Pass Rate 2026: What the Data Shows.

The Five-Year Cycle: Renewal and Extension Dates

Once certified, your calendar shifts from exam dates to expiry dates. Certification is valid for five years from course completion. Renewal is a distinct pathway with its own requirements:

• A minimum 8-hour renewal course.
• Both practicums (audiometric and hearing-protection-fitting) again.
• A separate recertification exam of 30 questions with a 45-minute limit.

The extension window

If life intervenes and you cannot complete recertification before your certification lapses, CAOHC offers a way to request an extension. The key date rule: submit the request at least 30 days before your expiry. Missing that cushion removes a safety net you may otherwise have had. Put a reminder on your calendar well ahead of the fifth anniversary of your course completion, and consult the CAOHC FAQ and recertification pages for the current procedure.

For employers who rely on staff holding current certification, tracking these dates is part of keeping a hearing conservation program defensible. Those considering the career angle can read OHC Jobs and Is the OHC Certification Worth It? Complete ROI Analysis 2026.

Building a Preparation Calendar Around the 11 Domains

Because the exam date follows your course date, the practical planning question is how to sequence your preparation around that course. The eleven domains split naturally into three clusters, which suggests an order that mirrors how the material builds on itself. Treat the timeline below as a template and adjust it to your course date.

Why this order? The physics and anatomy in the early weeks give you the vocabulary that the testing domains assume, and the testing domains (5 through 7) are tightly linked, so studying them back to back reinforces the chain from equipment to technique to evaluation. The final cluster ties the program together through measurement, protection, communication, and documentation. For a fuller study plan, see OHC Study Guide 2026: How to Pass on Your First Attempt, and for a last-minute refresher, OHC Cheat Sheet 2026: One-Page Review of Must-Know Facts.

Finally, schedule at least one full-length timed run before your exam date. Sitting through 75 minutes without pausing is a skill in itself, and a timed session at OHC Exam Prep helps you learn your pacing before it counts.

Frequently Asked Questions

For a broader introduction to the credential behind these dates, visit What Is OHC? or explore the training pathway at OHC Training.