- How CRST Scheduling Actually Works
- Why There Is No Fixed Annual Exam Calendar
- The One-Year Eligibility Clock and the 90-Day Extension
- What Must Be Settled Before You Book
- Test-Day Logistics: IDs, Calculator, and References
- Retest Timing: Two Weeks, Ninety Days, and One Year
- Planning Backward From Your Appointment
- After You Pass: The Three-Year Cycle
- Frequently Asked Questions
- The CRST is a computer-based exam scheduled through RETA staff at Kryterion or RETA Network Testing Centers, not on fixed national dates.
- Your application eligibility lasts one year from payment; a 90-day extension must be requested before that year expires.
- The experience route requires a separate Verification of Experience form before RETA can process your application.
- A discounted first retest needs a new application, a two-week minimum wait, and completion within 90 days of approval and payment.
How CRST Scheduling Actually Works
Search for "CRST exam dates" and you will probably expect a calendar of national sitting days, the way some credentials publish two or three fixed windows each year. The Certified Refrigeration Service Technician exam from the Refrigerating Engineers & Technicians Association (RETA) does not work that way. It is a computer-based exam delivered through the Kryterion Testing Network or RETA Network Testing Centers, and appointments are arranged through RETA staff once your application is approved.
That changes what "dates" means for you. Instead of watching for a registration deadline on a published calendar, you manage a set of personal clocks: the one-year application eligibility period that starts when you pay, the optional 90-day extension, the retest windows if you need them, and the three-year certification cycle that begins when you pass. This article walks through each of those clocks in the order you will meet them. For the official governing document, RETA's 2026 CRST Exam Information Handbook (Revision 09, valid January 1 through December 31, 2026) is the source for the exam rules summarized below.
Why There Is No Fixed Annual Exam Calendar
The CRST is an industrial refrigeration credential, and its candidate pool is working technicians spread across plants, cold storage facilities, food processing operations, and contracting firms. Many of them cannot leave a facility on a specific Tuesday in March. A rolling, appointment-based model lets a technician coordinate a three-hour testing slot around shift schedules, plant shutdowns, and seasonal production peaks.
For planning purposes, here is how the CRST model differs from a fixed-window model:
| Planning Element | CRST (RETA) |
|---|---|
| Delivery format | Computer-based, English, 150 multiple-choice questions |
| Time limit | Three hours |
| How you get an appointment | Arranged through RETA staff after application approval |
| Where you test | Kryterion Testing Network or RETA Network Testing Centers |
| Your deadline | One year from application payment (extendable by 90 days if requested in time) |
| Passing requirement | 70% |
The practical takeaway is that your deadline is personal. Nobody else's calendar determines yours, but your own eligibility period absolutely does. If you want the full explanation of how the 70% threshold works across the exam's scored and unscored items, see our guide to the CRST passing score.
The One-Year Eligibility Clock and the 90-Day Extension
Once you pay for your application, your eligibility to sit the exam runs for one year from the date of payment. That single sentence is the most important scheduling fact in this article, because it is the closest thing the CRST has to a hard deadline.
What the extension does and does not do
RETA allows a 90-day extension, but the handbook is explicit that it must be requested before the one-year eligibility period expires. A request after the clock runs out is not the same as a request before it. If you are anywhere near the end of your year and have not yet tested, contact RETA staff early rather than assuming you can sort it out at the last minute.
A year is generous, but not infinite
The exam covers 16 content areas, from Safety and Compressors to Ammonia Refrigeration Compliance and CO2 Systems. A full year gives most working technicians room to study at a steady pace, but it also makes procrastination easy. The candidates who run into trouble are usually not the ones with too little time on paper; they are the ones who treat the open window as permission to start late. For help structuring that year, our CRST study guide lays out a preparation plan built around the actual exam content.
What Must Be Settled Before You Book
You cannot get an appointment until your application is processed, and the application cannot be processed until your eligibility is documented. Two routes exist, and they have different paperwork timelines.
Route one: an active CARO or CIRO credential
If you hold an active CARO or CIRO credential from RETA, that credential satisfies the experience portion of eligibility. Your application also requires compliance with the RETA Code of Conduct. This is the faster path because there is no separate experience documentation to assemble and wait on.
Route two: four years of progressively responsible experience
If you do not hold CARO or CIRO, you need documentation of at least four years of progressively responsible refrigeration experience. This route requires a separate Verification of Experience form before RETA can process your application. That detail catches people off guard: the form is not an afterthought you can file alongside the exam booking. It is a gating item. If your verifier is a supervisor who travels or a former employer who is slow to respond, that delay eats directly into your scheduling timeline.
Key Takeaway
If you are on the experience route, send the Verification of Experience form to your verifier before you do anything else. Your exam date cannot be arranged until RETA can process the application, and the form is what unlocks that processing. Our CRST requirements guide covers what counts as progressively responsible experience in more depth.
Fees to confirm before you commit to a date
The 2026 handbook lists initial fees of $770 for RETA members and $1,065 for nonmembers. There is an unresolved discrepancy worth knowing about: RETA's program and application pages recorded $1,060 for nonmembers, a $5 difference from the handbook figure. We could not re-retrieve the live pages to settle it, so confirm the amount on your invoice rather than assuming either number. One official practice attempt is included with the initial application, and additional attempts are $59 each. For a fuller breakdown of what you will pay across the whole process, see the CRST certification cost guide.
Test-Day Logistics: IDs, Calculator, and References
Once your appointment is set, the remaining scheduling work is making sure nothing disqualifies you at the testing center door. The handbook is specific about what you bring and what you do not.
- Identification: Bring two forms of identification.
- Calculator: Bring a simple, nonprinting, nonprogrammable calculator with its memory cleared.
- References: RETA supplies the permitted onscreen references. Personal books, notes, and copies of study guides are not permitted.
The reference rule deserves attention. Because the references are supplied onscreen, part of your preparation should be learning to navigate references efficiently under a three-hour clock rather than memorizing everything. Spending hours leafing through unfamiliar material on exam day is a poor use of time when you have 150 questions to answer.
The clock inside the appointment
You have three hours for 150 multiple-choice questions, which works out to a little over a minute per question on average. Ten of those items are unscored pilot questions, leaving 140 scored items, and the exam does not tell you which are which. You can flag questions and revisit them, which is a useful tool when a Safety or Compressors item stalls you early. If you are curious how demanding the pace feels in practice, read our breakdown of how hard the CRST exam is.
Where the questions come from
The exam allocates questions across 16 areas. The official table publishes question counts, not percentages, and does not separate the pilot items by content area.
- Safety is the largest area at 24 questions.
- Compressors is next at 16 questions.
- Vessels, Piping, Valves & Controls, Electric Service Motors, etc., and Trouble Systems Operations carry meaningful but smaller counts.
- Purges and CO2 Systems are the smallest areas, so they are tempting to skip but still appear.
You can see every area explained in detail in our complete guide to all 16 CRST content areas.
Retest Timing: Two Weeks, Ninety Days, and One Year
Not everyone passes on the first sitting, and the retest rules have their own set of dates that are easy to misread. The handbook sets out the following structure for a first discounted retest after a failure.
| Retest Rule | Detail |
|---|---|
| Eligibility for discount | First retest following failure within one year |
| Discounted fee | $515 member / $710 nonmember |
| Paperwork | New application and payment required |
| Minimum wait | Two weeks between attempts |
| Completion deadline | Within 90 days after approval and payment |
Reading the retest rules correctly
Three separate numbers govern a retest, and they measure different things. The one-year figure relates to when the discounted first retest is available after a failure. The two-week figure is a mandatory cooling-off period. The 90-day figure is how long you have to actually sit the retest once your new application is approved and paid. Treat these as three independent constraints, not as one blended window.
Planning Backward From Your Appointment
Because the CRST has no fixed calendar, the most useful scheduling habit is working backward from a target appointment. This is the one place in this article where a study structure earns its space, and it is tied directly to the exam's content weighting rather than generic advice.
Safety and Ammonia Compliance first
- Safety is the largest area at 24 questions, so it earns the earliest and longest block.
- Pair it with Ammonia Refrigeration Compliance, since the regulatory and safety material reinforce each other.
Compressors, Oil Analysis, and Shaft & Bearing Maintenance
- Compressors is the second-largest area at 16 questions.
- Group the mechanical-health topics together so the diagnostic reasoning carries across areas.
Systems and heat transfer
- Cover Condensers & Cooling Towers, Evaporators & Heat Exchangers, Pumps & Transfer Systems, and Vessels, Piping, Valves & Controls.
Controls, electrical, and troubleshooting
- Work through Electric Service Motors, etc., Controls Maintenance, Leak Monitoring & Detection, and Trouble Systems Operations.
Small areas and full practice
- Close the gaps in Insulation, Purges, and CO2 Systems, then run a timed practice attempt.
Twelve weeks is an illustration, not a requirement; your eligibility year gives you far more room. The point is the ordering: the heaviest content areas go first so that a stumble on your timeline costs you the least valuable material. Use your included official practice attempt near the end of the plan as a diagnostic, and consider the extra attempts at $59 each if your first result shows a clear pattern of weakness. You can also drill the exam's style with the CRST practice test on our main site, and keep our one-page CRST cheat sheet handy for last-week review.
A note on RETA's own practice products
RETA sells practice exam products, but the question count for its current CRST practice product is unresolved in the sources we reviewed: one page describes 75 questions and another describes 50. Neither figure affects the real certification exam, which is verified at 150 questions. If you plan to buy a RETA practice product, confirm the current question count on the listing before purchase rather than relying on either number. For unlimited drilling at your own pace, our practice test platform is built around the 16 content areas above.
After You Pass: The Three-Year Cycle
Passing starts a new clock. The certification lasts three years, and the retrieved handbook is blunt about the consequence of missing the renewal: holders whose credential has expired are required to retest rather than submit late professional development hours. That makes the renewal deadline a harder deadline than anything in the application stage.
Renewal details to reconfirm
Our previously reviewed material on renewal indicates 24 relevant Professional Development Hours (2.4 CEUs), documented in the RETA Certification Database, plus an online renewal application and payment before expiration. It also indicates that HAZWOPER training does not count toward renewal hours. The renewal price recorded in our supplied materials was $235 for members and $835 for nonmembers. We could not re-retrieve the live renewal pages in this review, so treat these specifics as prior-reviewed rather than freshly confirmed. Before you rely on a course for renewal credit or quote a renewal cost to your employer, verify with RETA directly.
Key Takeaway
Start logging professional development hours the day you pass, not in your third year. Twenty-four hours is manageable when spread across thirty-six months and painful when compressed into the final few weeks. Since a lapse forces a full retest at initial-exam cost, a calendar reminder at the two-year mark is cheap insurance.
If you are weighing whether the credential justifies the exam fee and the renewal cycle, our analysis of whether the CRST is worth it and our CRST salary guide cover the return side of the equation.
Frequently Asked Questions
No fixed national calendar is described in the 2026 handbook. The exam is computer-based, and appointments are arranged through RETA staff at Kryterion Testing Network or RETA Network Testing Centers once your application is approved. Your real deadline is the one-year eligibility period that starts when you pay.
Application eligibility lasts one year from payment. A 90-day extension is available, but it must be requested before the one-year eligibility period expires, so contact RETA early if you are running short on time.
The minimum interval between attempts is two weeks. A first discounted retest within one year of failing costs $515 for members and $710 for nonmembers, requires a new application and payment, and must be completed within 90 days after approval and payment.
Bring two forms of identification and a simple, nonprinting, nonprogrammable calculator with its memory cleared. RETA supplies the permitted onscreen references, and personal books, notes, and study-guide copies are not allowed.
According to the retrieved 2026 handbook, holders of an expired credential must retest rather than submit late professional development hours. Certification lasts three years, so plan your renewal well before the expiration date and confirm current renewal requirements with RETA.