- 2026 Testing Windows: March and September
- Fee Deadlines: Early-Bird, Regular, and Late Pricing
- How to Register for a PSI Testing Appointment
- Eligibility Timing: When to Apply Relative to Test Dates
- Why the September 2025 Content Outline Changes Your Timeline
- Choosing March vs. September Based on Your Domains
- Building a Scheduling Plan Around the Three Domains
- International Testing Sites and Added Fees
- After Test Day: Scores, Recertification, and What's Next
- Frequently Asked Questions
- INCC offers the CRNI exam through PSI only in March and September each year.
- Early-bird pricing is $335 (INS member) or $475 (nonmember)-save up to $100 by registering early.
- You need 1,600 hours of infusion therapy experience as an RN within the prior 2 years before you can schedule.
- The exam reflects the content outline that took effect in September 2025-confirm your study materials match it.
2026 Testing Windows: March and September
Unlike certifications that offer rolling, on-demand testing, the CRNI credential from the Infusion Nurses Certification Corporation (INCC) is administered through PSI in two fixed windows per year: March and September. This twice-yearly cadence is a defining feature of CRNI logistics, and it changes how you should plan your preparation compared with certifications that let you test whenever you're ready.
Because INCC is legally and financially independent from the Infusion Nurses Society (INS), even though the two organizations are affiliated, exam administration follows INCC's own calendar rather than an INS conference schedule. If you miss the registration window for March, your next opportunity isn't a few weeks later-it's September. That six-month gap makes early planning far more consequential than it would be for an exam offered monthly.
Fee Deadlines: Early-Bird, Regular, and Late Pricing
CRNI registration fees increase in three tiers as each testing window approaches. Understanding this structure lets you budget accurately and avoid paying more than necessary.
| Deadline Tier | INS Member Fee | Nonmember Fee |
|---|---|---|
| Early-Bird | $335 | $475 |
| Regular | $385 | $525 |
| Late | $435 | $575 |
Candidates testing at an international site should also budget for an additional $140 site fee. For a full breakdown of how these numbers compare with other nursing credentials and what INS membership actually saves you over time, see our CRNI Certification Cost 2026: Complete Pricing Breakdown.
Key Takeaway
Registering during the early-bird window can save a nonmember up to $100 compared to the late deadline. Set a calendar reminder the moment each window opens.
How to Register for a PSI Testing Appointment
Once your application is approved, scheduling happens through PSI's testing platform rather than directly through INCC or INS. The general sequence looks like this:
- Submit your CRNI application with documentation of RN licensure and infusion therapy hours to INCC.
- Receive an Authorization to Test (ATT) once eligibility is confirmed.
- Use your ATT to book a seat with PSI within the current testing window (March or September).
- Choose a computer-based testing center, or confirm availability at an international site if applicable.
- Arrive with required identification on your scheduled test date.
The exam itself consists of 140 four-option multiple-choice items, of which 120 are scored and 20 are unscored pretest items used to evaluate future exam content, all completed within 2 hours and 30 minutes. You won't know which items are scored versus unscored, so every question deserves full attention. For a deeper look at how question difficulty and pacing actually feel on test day, read How Hard Is the CRNI Exam? Complete Difficulty Guide 2026.
Eligibility Timing: When to Apply Relative to Test Dates
Scheduling isn't just about picking a date-it's about confirming you're actually eligible in time to make that date. CRNI eligibility requires:
- A current, active, unrestricted RN license
- At least 1,600 hours of infusion therapy experience as an RN within the prior 2 years
Notably, direct bedside care is not a strict requirement, which opens eligibility to nurses in education, informatics, and consulting roles who still accumulate qualifying infusion therapy hours. If you're unsure whether your role or hour count qualifies, review the full breakdown in CRNI Requirements 2026: Eligibility, Prerequisites & How to Qualify before you submit an application-application processing takes time, and you don't want to discover a documentation gap after a window has already closed.
Why the September 2025 Content Outline Changes Your Timeline
The current CRNI content outline took effect in September 2025, which means anyone testing in 2026-whether in the March or September window-will be tested against this updated framework. This matters for scheduling because outdated prep materials tied to a prior outline may not align with current domain weighting or terminology.
Before you lock in a test date, verify that your study resources explicitly reference the post-September 2025 outline. This is especially important if you purchased materials, courses, or practice questions before that date. Our CRNI Study Guide 2026: How to Pass on Your First Attempt is built around the current outline and can help you confirm your prep is current before you commit to a test date.
Choosing March vs. September Based on Your Domains
The CRNI exam covers three domains, and the amount of content in each should influence how much runway you build into your schedule:
Domain 1: Principles of Practice (29%)
Covers foundational infusion nursing concepts, including regulatory, quality, and patient safety principles that underpin every other domain.
- Requires broad conceptual recall rather than deep technical memorization
Domain 2: Access Devices (33%)
Focuses on vascular access device selection, insertion, maintenance, and complication management.
- Device-specific scenarios are common in the four-option question format
Domain 3: Infusion Therapies (38%)
The largest domain, with 46 scored items, covering pharmacology, fluid and electrolyte therapy, and administration of specific infusates.
- Deserves the largest share of your study calendar given its scored-item weight
Because Infusion Therapies carries the most scored items, candidates who are newer to complex infusate management or pharmacology-heavy content may want extra lead time before their target window-which can mean choosing September over March to build in more preparation weeks. For a full walkthrough of every topic within each domain, see CRNI Exam Domains 2026: Complete Guide to All 3 Content Areas.
Building a Scheduling Plan Around the Three Domains
Once you know your target window, work backward to allocate study time proportionally to each domain's weight rather than splitting time evenly across all three.
Principles of Practice
- Review regulatory standards, documentation, and quality/safety principles
- Take a baseline practice set to identify weak areas early
Access Devices
- Drill device selection criteria, insertion technique, and complication scenarios
- Focus on the four-option question style, since access device items often hinge on eliminating plausible-but-wrong distractors
Infusion Therapies
- Allocate the most time here given its 46 scored items
- Work through pharmacology and fluid/electrolyte case scenarios repeatedly
Full Review and Timing Practice
- Simulate the full 140-item, 2.5-hour format under timed conditions
- Revisit any domain where practice scores lag
Note that this schedule uses standard spaced-review principles only as a scheduling framework tied to CRNI's actual domain weighting-the value comes from matching study hours to scored-item distribution, not from any generic study hack on its own. If you want a compact reference to keep alongside this schedule, our CRNI Cheat Sheet 2026: One-Page Review of Must-Know Facts summarizes must-know facts by domain, and you can test your readiness anytime with practice questions on the main practice test hub.
Key Takeaway
Allocate roughly proportional study time to each domain's percentage weight-Infusion Therapies at 38% deserves noticeably more hours than Principles of Practice at 29%.
International Testing Sites and Added Fees
Candidates testing outside the standard PSI network within the U.S. should confirm whether their location qualifies as an international site, since this triggers the additional $140 fee on top of standard registration tiers. This fee applies regardless of INS membership status and should be factored into your total budget when scheduling. Combined with the tiered registration fees, international candidates should register as early as possible in the window to avoid stacking a late fee on top of the site fee.
After Test Day: Scores, Recertification, and What's Next
Results are reported on a pass/fail basis, along with raw scores broken out by major content category, so you'll see relative performance across Principles of Practice, Access Devices, and Infusion Therapies even though the overall result is binary. The passing point itself is set using the Angoff method and held consistent across different exam forms through pre-equating, meaning the standard doesn't shift based on which version of the exam you receive. For a detailed explanation of how that standard is calculated, see CRNI Passing Score 2026: Exactly What You Need to Pass, and for context on outcomes across the broader candidate pool, check CRNI Pass Rate 2026: What the Data Shows.
Once certified, your CRNI credential is valid for 3 years. Recertification requires 1,000 infusion-therapy practice hours plus either retaking the exam or earning 40 CRNI Recertification Units, with at least 30 of those units coming from national INS meetings or INS Virtual Education Conferences. Building this into your long-term calendar now-alongside your initial test date-prevents a scramble later. If you're still weighing whether the credential is worth the investment of time and fees, our analysis in Is the CRNI Certification Worth It? Complete ROI Analysis 2026 and CRNI Salary Guide 2026: Complete Earnings Analysis can help you decide, and CRNI Jobs outlines the employers who prioritize this credential.
Once you've settled on a test date, spend the remaining weeks running full-length timed sets on our practice test platform to build stamina for the 140-item, 2.5-hour format before you sit for the real exam.
Frequently Asked Questions
The CRNI exam is offered exactly twice per year, in March and September, through PSI testing centers. There is no additional testing window between these two.
You'll move into the regular fee tier ($385 for INS members, $525 for nonmembers), and if you wait further, the late tier ($435/$575) applies. Fees increase but eligibility to test in that window remains open until the final deadline.
No, but INS membership provides a discounted rate at every fee tier compared to the nonmember price, so joining before registering can reduce your total cost.
Both the March and September 2026 windows test against the content outline that took effect in September 2025, so the window itself doesn't change the material-just make sure your study resources reflect that current outline.
Rescheduling policies are managed through PSI once you have your Authorization to Test, so any date changes need to happen within the active window rather than carrying over to the next testing period.