- 2026 Testing Windows: March and September
- Registration Deadlines and Fee Tiers
- Eligibility Checkpoint Before You Register
- Scheduling With PSI: What to Expect
- Choosing Your Window: March vs. September
- Building a Study Calendar Around Your Test Date
- Exam Day Logistics and Format Refresher
- After You Sit: Results, Retakes, and Recert Timing
- Frequently Asked Questions
- The CRNI exam is offered only twice a year, in March and September, through PSI testing centers.
- Early-bird pricing is $335 (INS member) or $475 (nonmember); late fees push totals to $435/$575.
- You need 1,600 hours of infusion therapy experience as an RN within the prior 2 years to register.
- International candidates should budget an extra $140 site fee on top of standard registration.
2026 Testing Windows: March and September
Unlike many nursing certifications that run on rolling, year-round testing calendars, the CRNI credential from the Infusion Nurses Certification Corporation (INCC) is offered during two fixed windows each year: one in March and one in September. INCC is legally and financially independent from the Infusion Nurses Society (INS), even though the two organizations are closely affiliated, and INCC controls the testing calendar, eligibility rules, and fee structure entirely on its own.
This twice-yearly cadence changes how you should think about exam prep compared to certifications with continuous testing. Missing a deadline for the March window doesn't just mean waiting a few weeks - it means waiting until September, a six-month delay. If you're mapping out your CRNI Study Guide 2026: How to Pass on Your First Attempt against a calendar, the testing window itself needs to be the anchor point, not an afterthought.
Registration Deadlines and Fee Tiers
Every CRNI testing window has three registration tiers, and the fee climbs as the deadline approaches. Register early and you save real money; wait until the last possible moment and you'll pay the most for the same 140-item exam.
| Registration Tier | INS Member Fee | Nonmember Fee |
|---|---|---|
| Early-bird | $335 | $475 |
| Regular | $385 | $525 |
| Late | $435 | $575 |
Candidates testing at an international site should plan for an additional $140 international site fee on top of whichever tier they register under. That fee can meaningfully change your total out-of-pocket cost, so if you're outside the U.S., factor it into your budget early rather than discovering it at checkout. For a full breakdown of every cost associated with the credential - application, retake, and recertification fees included - see CRNI Certification Cost 2026: Complete Pricing Breakdown.
Key Takeaway
The gap between early-bird and late pricing is $100 for both members and nonmembers. That's roughly the cost of a solid CRNI prep resource - register early and put the savings toward study materials instead.
Eligibility Checkpoint Before You Register
Before you commit to a testing window, confirm you actually meet INCC's eligibility criteria. Registering for a date you can't sit for wastes both your fee and your window.
- Current active, unrestricted RN license - no exceptions, no provisional or restricted licenses accepted.
- At least 1,600 hours of infusion therapy experience as an RN, accrued within the prior 2 years.
- Direct bedside care is not a requirement - hours from infusion-adjacent roles (education, administration, quality, vascular access teams) can count, which surprises many applicants.
If you're unsure whether your practice hours qualify, work through the full breakdown in CRNI Requirements 2026: Eligibility, Prerequisites & How to Qualify before you submit payment. Eligibility issues discovered after you've registered for a specific window are far harder to resolve than ones caught in advance.
Scheduling With PSI: What to Expect
Once INCC confirms your eligibility and processes your registration, scheduling itself happens through PSI, the computer-based testing vendor. A few mechanics worth knowing:
- You'll receive authorization to schedule only after your application and fee are processed - plan for this to take time, especially if you register close to a deadline.
- Appointment slots at PSI centers fill up as the window approaches, particularly in metro areas. Early registrants get first pick of dates and times within the window.
- International candidates testing at approved international sites need to confirm site availability separately, since not every location runs both March and September sessions.
Because scheduling access is gated by your registration status, the fee tier you land in also indirectly affects how much appointment flexibility you'll have. Early-bird registrants aren't just paying less - they're also scheduling first.
Choosing Your Window: March vs. September
There's no inherently "easier" window - content outline, item count, and passing standard are identical regardless of month. The right choice comes down to your own timeline, not the calendar itself.
Questions to Ask When Picking a Window
Match the testing date to your actual readiness, not the nearest deadline.
- Will you have logged your full 1,600 hours of qualifying experience by the registration deadline for this window?
- Do you have at least 8-10 weeks of realistic study time before the date, given your clinical schedule?
- Are you newly transitioning into infusion-heavy roles, or has your outline knowledge gone stale since nursing school?
If you're on the fence about how much runway you need, read How Hard Is the CRNI Exam? Complete Difficulty Guide 2026 for a realistic read on the exam's difficulty before locking in a date six months out.
Building a Study Calendar Around Your Test Date
Once your window is set, work backward from it using the exam's own domain weighting - the same content outline that has been in effect since September 2025. The three domains carry unequal weight, so your calendar shouldn't split time evenly.
Domain 1: Principles of Practice (29%)
Covers infection prevention, patient rights, quality improvement, and legal/regulatory concepts that apply across every infusion setting.
- Foundational but broad - schedule this early to build vocabulary for the other domains.
Domain 2: Access Devices (33%)
Vascular access device selection, insertion, maintenance, and complication management - a heavily technical domain with device-specific detail.
- Requires memorizing device-specific protocols; benefits from mid-calendar repetition.
Domain 3: Infusion Therapies (38%)
The largest domain, worth 46 scored items - covers fluid and electrolyte therapy, pharmacology, blood administration, and parenteral nutrition.
- Because it carries the most scored items, it deserves the most calendar time and the final review pass.
Principles of Practice
- Build baseline knowledge of regulatory and quality-improvement concepts
- Review infection prevention standards
Access Devices
- Drill device selection and complication scenarios
- Use spaced repetition on insertion/maintenance protocols since this content is detail-heavy
Infusion Therapies
- Prioritize this domain given its 38% weighting and 46 scored items
- Work timed practice sets to build stamina for the 2.5-hour format
Full-Length Review
- Mix questions across all three domains
- Revisit weak areas identified in earlier practice sessions
For a domain-by-domain content breakdown with more specific topic lists, cross-reference CRNI Exam Domains 2026: Complete Guide to All 3 Content Areas. And if you want a fast, single-page reference to keep nearby during your final review week, the CRNI Cheat Sheet 2026: One-Page Review of Must-Know Facts condenses the highest-yield facts from all three domains.
Exam Day Logistics and Format Refresher
Knowing the format cold removes one more variable from exam day. The CRNI exam consists of 140 four-option multiple-choice items, of which 120 are scored and 20 are unscored pretest items mixed in without identification. You have 2 hours and 30 minutes to complete the full set at the PSI testing center.
- You won't know which items are scored versus pretest, so treat every question with equal seriousness.
- Pacing matters: 150 minutes across 140 items gives you roughly a minute per question, but infusion-calculation and scenario items will take longer than recall-based ones - budget accordingly.
- Results are reported as pass/fail, along with raw scores broken out by major content category, so you'll know which domain areas were relatively stronger or weaker even if you pass.
If you want to see how your prep stacks up against real exam conditions before test day, running full-length timed sets on our CRNI practice test platform is one of the most direct ways to check your pacing against the 150-minute limit.
After You Sit: Results, Retakes, and Recert Timing
Whichever window you test in, plan beyond the exam date itself. The CRNI credential is valid for 3 years, and recertification requires 1,000 infusion-therapy practice hours plus either retaking the exam or earning 40 CRNI Recertification Units, at least 30 of which must come from national INS meetings or INS Virtual Education Conferences. Marking your recertification deadline on the same calendar where you tracked your original test date keeps you from scrambling three years from now.
If your initial attempt doesn't go as planned, understanding how the current pass rate landscape looks can help you calibrate expectations for a retake - see CRNI Pass Rate 2026: What the Data Shows for the most recent reported figures, including the official 2025 pass rate of 66%.
Key Takeaway
A failed attempt in March doesn't mean waiting a full year - the September window is typically available for a retake, so build a review plan around that gap rather than starting from scratch.
Beyond the exam date itself, it's worth stepping back and asking whether the credential fits your career trajectory. Employers hiring for infusion-focused roles - home infusion companies, ambulatory infusion centers, vascular access teams, and hospital-based infusion services - increasingly list CRNI as preferred or required. If you're weighing the investment of time and the registration fees against the payoff, Is the CRNI Certification Worth It? Complete ROI Analysis 2026 and CRNI Salary Guide 2026: Complete Earnings Analysis both go deeper on that question, and CRNI Jobs covers what the current hiring landscape actually looks like for certified nurses.
Frequently Asked Questions
Twice - once in March and once in September, both administered as computer-based tests through PSI testing centers.
You move into the regular fee tier ($385 INS member / $525 nonmember), and if you wait longer, the late tier ($435/$575). Missing the window entirely means waiting for the next testing period, roughly six months later.
Yes. In addition to standard registration fees, candidates testing at international sites are charged a $140 international site fee.
No - you need at least 1,600 hours of infusion therapy experience as an RN within the prior 2 years confirmed before registering. Direct bedside care isn't required, but the hours must be verifiable and current.
The domains and weighting stay consistent within a given content outline cycle. The current outline took effect in September 2025, so both the March and September 2026 windows are tested against that same version.
Whichever window you target, treat the registration deadline - not the test date - as your real countdown. Lock in eligibility, register early for the fee savings and scheduling flexibility, and build your study calendar around the domain weighting rather than an even split. If you want to gauge readiness before committing to a date, start with a practice test to see where your domain scores currently stand.