Is the HESI A2 Hard to Pass?

The HESI A2 is moderately difficult. Most programs require 70–75%, which most students with focused preparation can achieve. The Anatomy & Physiology and Biology sections are the most challenging for students who have not recently taken those courses. Students who identify their weakest section first and prepare targeted content for it pass at substantially higher rates than those who study all sections equally.

Difficulty varies by your science background. Students with recent A&P and biology coursework (within the last 2 years) typically find the HESI manageable with 3–5 weeks of structured preparation. Students who have not taken science courses in several years typically need 6–10 weeks, particularly to rebuild A&P and biology content. The Grammar, Vocabulary, and Reading sections are generally accessible with moderate preparation.

Anatomy & Physiology is the hardest HESI A2 section for most students. It covers a large body of content at a level that requires genuine understanding — memorizing terms is not enough. Biology is the second most challenging. Math is considered moderately difficult. Grammar and Vocabulary are the most accessible sections for most test-takers.

The HESI A2 and NCLEX test fundamentally different things and are not directly comparable. The HESI A2 is an admissions exam — it tests academic readiness in science, math, and language. The NCLEX is a licensure exam — it tests clinical nursing judgment and patient safety. The NCLEX is generally considered more high-stakes because licensure depends on it. The HESI A2 is a prerequisite to nursing school; the NCLEX is taken after graduation. HESI also makes a separate exit exam (HESI Exit) used by nursing programs to predict NCLEX readiness — this is different from the HESI A2.

They are comparable in overall difficulty, but their hard sections differ. The HESI A2 A&P section goes deeper into anatomy content than the TEAS Science section. The TEAS covers chemistry and physics more broadly. Students who find chemistry difficult often prefer the HESI A2; students who find anatomy and physiology difficult often prefer the TEAS. Most programs require one or the other — your school decides which one you take.

Elsevier does not publish national HESI A2 pass rate data. Pass rate is program-defined — there is no universal cutoff. A significant portion of first-time test-takers do not meet their program's minimum on the first attempt, particularly for programs requiring 75%+. Students using structured preparation materials consistently outperform those who study informally.

The NCLEX is harder in terms of clinical complexity and stakes — it determines whether you are licensed to practice nursing. The HESI A2 is harder to predict because students underestimate the science content depth. Most nurses report the NCLEX as the more difficult exam overall, but the HESI A2 can feel unexpectedly challenging for students who assume it is a straightforward placement test.

Elsevier requires a 60-day waiting period between HESI A2 attempts. Individual programs may impose stricter limits — some allow only 2 attempts per application cycle. If you are planning a retake, target your lowest section score specifically. A focused 3–4 week retake prep on your single weakest section produces the highest score improvement.