The short version: ATI and HESI are school exit exams built by private testing companies. NCLEX-PN is the actual licensure exam built by the National Council of State Boards of Nursing (NCSBN). The content overlaps a lot. The formats, the scoring, and the stakes do not.
If what you actually need is the whole picture of the exit exam itself, what score your program requires, whether a school can hold your graduation over it, and what happens if you fail, start with the complete LPN/LVN exit exam guide. This post is the comparison.
Quick comparison table
| ATI | HESI | NCLEX-PN | |
|---|---|---|---|
| Type | School exit exam | School exit exam | Licensure exam |
| Created by | ATI Nursing Education | Elsevier (HESI) | NCSBN |
| Purpose | Predict NCLEX readiness | Predict NCLEX readiness | License you as a nurse |
| Adaptive? | No (fixed length) | No (fixed length) | Yes (computer-adaptive) |
| Length | 180 questions | 150 questions typically | 85–150 questions |
| Passing standard | School-set; program-specific predicted probability | School-set (often 850–900+) | Pass/fail, set by NCSBN |
| Back-tracking allowed? | Usually yes (flag & review) | Usually yes | No |
| Cost | Bundled with tuition | Bundled with tuition | $200 registration, $350 if you register on or after Feb 1, 2027 |
| Re-take if you fail | Usually 1–2 retries | Usually 1–2 retries | 45 days, up to 8 times/year |
What is the ATI exit exam?
ATI (Assessment Technologies Institute) is a company that builds standardized nursing exams used by hundreds of nursing programs in the US. The one most LPN/LVN students take is the ATI PN Comprehensive Predictor, which people just call the "ATI exit exam." Your school usually makes you hit a certain probability of passing the NCLEX on this exam before they'll let you graduate.
On the Comprehensive Predictor, ATI gives you a probability percentage — something like "92% predicted probability of passing NCLEX on the first attempt." (The Level 1/2/3 ratings you've probably heard about come from a different ATI product, the Content Mastery subject exams, not the Predictor.) Programs set their own required predicted probability. In my experience some land in the low 90s, but there's no universal cutoff, so check your program handbook. Score below the cutoff and you usually have to remediate and retake it.
Key thing about ATI
ATI is a fixed-length, non-adaptive exam. You can move forward and backward through the questions, flag the ones you're unsure about, and review at the end. That makes it feel a lot like a normal paper test. It's comforting, but it also means it doesn't really prepare you for the NCLEX's no-going-back format.
What is the HESI exit exam?
HESI (Health Education Systems Incorporated, now owned by Elsevier) is ATI's main competitor. The one LPN students take is the HESI Exit Exam for PN. It does the same job as the ATI. It predicts how you'd do on the NCLEX, and your school uses it as a gate to graduation.
HESI scores come back as a number, usually between 0 and 1500. Most schools want at least 850–900 to graduate, and some want 950 or higher. Like ATI, HESI is fixed-length and lets you backtrack within the exam.
Key thing about HESI
HESI has a reputation for being harder than ATI at the same content level. Students who feel fine on ATI sometimes get blindsided by how HESI words its questions. So if your school uses HESI, expect tougher wording and more "select all that apply" questions.
What is the NCLEX-PN?
The NCLEX-PN (National Council Licensure Examination for Practical Nurses) is the real licensure exam. It decides whether you can legally practice as an LPN or LVN in the United States. Pass it and your state board of nursing issues your license. Fail it and you can't work as a nurse until you pass.
The NCLEX-PN is built by the NCSBN, the same group that builds the NCLEX-RN. It's computer-adaptive, so the test gets harder or easier based on your answers, and it can end as soon as the algorithm is 95% confident you'll pass (or fail).
Key things about the NCLEX-PN
- Adaptive length: minimum 85 questions, maximum 150. Those totals already include a set of unscored pretest items, and on the 2026 plan, three embedded case-study sets.
- No backtracking: once you click "next," that answer is locked.
- Pass/fail only: you don't get a score. You either passed or you didn't.
- Test plan is fixed: the current NCLEX-PN Test Plan (April 2026 – March 2029) lays out four major content areas and the percentage of questions in each.
- Re-test policy: if you fail, you can retest after 45 days, up to 8 times per year.
All three exams test the same core domains: Safe and Effective Care Environment, Health Promotion and Maintenance, Psychosocial Integrity, and Physiological Integrity. The actual nursing content (lab values, drug knowledge, prioritization, communication) is the same. What changes is how they ask the questions and what counts as passing.
Why your school's exit exam doesn't fully prepare you for the NCLEX
If you nailed your ATI or HESI exit exam, good. That means you have the content knowledge. But there are real format gaps you need to close before NCLEX test day:
- No backtracking on the NCLEX: ATI and HESI both let you flag and come back. The NCLEX doesn't. Once you answer, it's gone. So you have to read every question carefully once, commit, and move on.
- Adaptive difficulty: the NCLEX gets harder as you do well. By the end you'll probably be answering questions much harder than anything on ATI or HESI. That's normal. It's not a sign you're failing.
- The pass/fail uncertainty: on exit exams you can roughly track your score. On the NCLEX you can't. Some students panic when the test ends at 85 questions ("did I bomb it?") or runs all the way to 150 ("am I really failing?"). Length doesn't tell you the outcome.
- Next Generation NCLEX (NGN) item types: the current NCLEX format includes case studies with bowtie, matrix, and drag-and-drop questions. ATI and HESI cover some of these, but the NCLEX has built them in deeper.
Study strategy for each exam
Studying for ATI
ATI's questions are usually more straightforward than HESI's. Focus on:
- Reading the ATI textbooks and modules your school assigned. The questions often pull straight from specific ATI content.
- The "Learning System" practice questions ATI gives you. Take all of them at least once.
- Reviewing your school's previous ATI proctored exams if you can get them.
Studying for HESI
HESI questions are wordier and more application-based. Focus on:
- Practice questions with detailed rationales. HESI tests whether you understand it, not whether you memorized it.
- The Evolve / Elsevier resources if your school subscribes.
- SATA (select-all-that-apply) practice. HESI loves these.
Studying for the NCLEX-PN
The NCLEX is its own beast. Focus on:
- Q-bank practice with rationale review. The biggest predictor of passing is how many practice questions you've done with good rationale review. Start with the free practice quizzes: 1,073 NCLEX-PN style questions with a rationale on every one, no account needed.
- Practicing under no-backtracking conditions. Set a rule with yourself: once you pick an answer, you commit. That's what our paid NCLEX-PN QBank does in exam mode ($39 for 30 days, one-time, no auto-renew).
- Reading the official NCLEX test plans page from NCSBN. Know what's actually tested and in what proportions.
- Studying the high-yield areas: Med-Surg, Pharmacology, Fundamentals. These three alone make up most of the exam.
"My instructors said focus on the exit exam first"
This is common advice and honestly it's not wrong. Your school's exit exam is the gate to graduating, so you have to clear that hurdle first. But here's the nuance. The content you study for ATI or HESI is roughly 90% the same content you need for the NCLEX. What changes between them is the format and the test-taking strategy.
So a smart plan looks like this:
- Until your exit exam: use your school's resources (ATI modules, HESI practice tests, instructor materials) so you pass it.
- After your exit exam, until NCLEX: shift to NCLEX-style practice. No-backtrack mock exams, NGN case studies, and the NCLEX question reading strategy.
FAQ
Can I pass the NCLEX-PN if I failed my ATI or HESI exit exam?
Yes. Plenty of students do. Exit exam scores predict how you'll do, but they don't decide it. A failed exit exam means you have more work to do, not that the NCLEX is impossible. Figure out the categories you struggled with, drill those with the free practice quizzes, then take a full-length test under NCLEX conditions in the paid QBank when you're ready.
Is the NCLEX harder than the ATI or HESI?
Most students say HESI feels closest to the NCLEX in difficulty. But the NCLEX feels harder because of the no-backtracking rule and the way it ramps up as you go. The content itself isn't really harder. The experience is.
How long after my exit exam should I take the NCLEX?
Most LPN/LVN graduates apply to take the NCLEX-PN within 4–6 weeks of graduation. Use the first 2–3 weeks to wrap up paperwork and finish the 30-day study plan. Don't wait too long. Your content knowledge is fresh right after graduation and it gets stale fast.
What's a passing score on the NCLEX-PN?
There isn't one. The NCLEX-PN uses a logit scale and a pass/fail standard set by the NCSBN. Your result is pass or fail. You won't see a number.