What Is PE-I&S?

What PE-I&S Actually Is

PE-I&S stands for Principles and Practice of Engineering - Industrial and Systems. It is the professional licensure examination that industrial and systems engineers take as the final examination step toward becoming a Professional Engineer (PE). NCEES labels it "PE Industrial and Systems." Passing it, combined with meeting your licensing board's other requirements, is how an industrial or systems engineer earns the right to use the PE designation in a given state or territory.

That distinction matters because people often search for the exam as if it were a vendor certificate. It is not. It is a licensure exam, and the license itself is issued by a state or territorial board rather than by NCEES. If you want the shorter definitional versions of this topic, we also cover what PE-I&S stands for and the meaning of PE-I&S separately; this article takes the wider view of how the exam is structured and what it demands.

Who Runs the Exam and Who Decides Eligibility

Two different bodies are involved, and confusing them is a common early mistake.

• NCEES (National Council of Examiners for Engineering and Surveying) writes and administers the exam, publishes the exam specifications, and handles scoring.
• Your licensing board decides whether you are eligible to sit for the exam, what approvals you need, and what additional application fees apply.

A common licensure pathway is an EAC/ABET-accredited engineering bachelor's degree, the FE exam, four years of acceptable engineering experience, and then the PE exam. That is a common pathway, not a universal rule for who may sit for the exam. Some boards structure the sequence differently, and the board you select controls your application requirements. The details are covered in our guide to PE-I&S requirements and eligibility.

If you use the NCEES Record service to assemble your credentials for engineering licensure, the application asks for five references from U.S.-licensed engineers. This is a feature of NCEES Record applications and is not a universal requirement to sit for the exam; your board's application rules govern.

How the Exam Is Built: Format and Testing Conditions

PE-I&S is a single-day, computer-based exam delivered at approved Pearson VUE test centers. The October 2026 administration is scheduled for October 28, 2026, and all examinees in an administration receive the same question set. You can find scheduling specifics in our PE-I&S exam dates guide.

Two sections, one clock

The exam has two sections that share the testing clock. Once you submit a section, you cannot reopen it. That rule changes how you should pace the exam: you cannot bank time in the first section and assume you can return to flagged items later in a section you have already submitted. Practice finishing a section with a deliberate review pass before you submit.

The reference handbook problem

Personal reference materials are prohibited. What you have instead is the supplied electronic reference handbook, which is searchable. The practical consequence is that your preparation should include learning to find things in that handbook quickly, rather than relying on memorized formulas alone or on a binder you cannot bring. For a quick-hit review of what is worth committing to memory, see our PE-I&S cheat sheet.

The Five Exam Domains

The NCEES exam specification lists five numbered objectives. Each one carries the same official allocation: 14-21 questions. NCEES does not publish fixed percentage domain weights for this exam, and no single domain has a larger allocation than the others. That is an unusual feature, and it means you cannot safely ignore any area on the theory that it is lightly tested.

The subtopics above are illustrative, not exhaustive; the official specification is the authority on what falls under each objective. Note also that the five numbered headings are the official exam objectives, not preparation-curriculum headings. Course providers sometimes organize their material around different headings, so when a training course and the NCEES specification disagree on structure, trust the specification. A deeper walk-through is in our complete guide to the five PE-I&S exam domains.

What the Question Types Reward

PE-I&S is not purely multiple choice. The exam uses multiple-choice items alongside alternative item types:

• Multiple-correct: more than one answer may be right, and you must identify the full set
• Point-and-click: you select a location or element on a figure or diagram
• Drag-and-drop: you place items into categories or sequences
• Numerical fill-in: you compute the answer yourself rather than choosing from options

Scored items receive correct or incorrect credit, with no partial credit. That is important for multiple-correct items in particular: getting most of the right selections does not earn you part of the point. There is also no deduction for wrong answers, so you should answer every item rather than leave anything blank.

Numerical fill-in items remove the safety net of seeing the correct answer among the options. If your calculation lands on a number that is not one of four choices, you have no signal that something went wrong. Practice carrying units carefully, especially since the exam uses both SI and USCS, and double-check conversions before you commit an answer.

Unscored pretest items

Of the 85 questions, some are unscored pretest items, and they are not identified. You cannot tell which ones they are, so treat every question as if it counts. Do not burn extra time trying to guess which items are the "experimental" ones.

Fees, Scoring and Pass-Rate Context

What it costs

The NCEES exam fee is US$400 per attempt. Separate board application fees can apply on top of that, and those vary by jurisdiction. For a fuller accounting, see our PE-I&S cost breakdown. If you plan to use the official NCEES e-book practice exam, it is priced at $59.95 and contains 85 questions with solutions. It is based on the October 2020 specifications and has the same content as the 2020 print edition. Public errata for that practice exam, posted May 1, 2023, are available from NCEES, so check them before relying on any answer that looks off.

How scoring works

You receive a pass/fail result based on a scaled score that meets the NCEES minimum-competence standard. NCEES does not publish a numerical passing score, so you will not find a magic percentage correct to aim for. Our explainer on the PE-I&S passing score covers what is and is not known about how that standard works.

What the published pass-rate data says

NCEES's pass-rate table, updated January 2026, reports a 69% pass rate for first-time examinees (80 examinees) and a 29% pass rate for repeat examinees (21 examinees). Two cautions apply. First, these figures describe the prior October administration, not the upcoming October 2026 sitting. Second, the examinee counts are small, so treat the percentages as a snapshot rather than a stable forecast. The gap between first-time and repeat results is worth noticing, though: it suggests that retaking without changing your preparation approach is a poor bet. We discuss this in our PE-I&S pass-rate analysis and in how hard the PE-I&S exam is.

Who Hires Industrial and Systems Engineers

Industrial and systems engineers work wherever organizations need to improve how people, materials, information and equipment fit together. The five exam domains map naturally to the kinds of employers and roles involved:

• Manufacturing and production firms need operations, facilities and work-design expertise to plan lines, layouts and staffing
• Logistics, distribution and supply-chain operators rely on facilities planning and operations engineering for flow and capacity
• Healthcare systems use work design, quality and systems thinking to improve patient flow and reduce errors
• Consulting and engineering services firms apply the full range of domains across client projects
• Government and defense-related organizations draw on systems engineering and quality disciplines

On compensation, the most defensible public number is the U.S. Bureau of Labor Statistics median annual wage for industrial engineers: $102,440 as of May 2025. That figure describes the occupation as a whole. It is not a PE-specific salary and it does not measure a licensure premium, so do not read it as what a license adds. We examine the broader picture in our salary guide and weigh the investment in whether the PE-I&S credential is worth it. If you are scanning for roles, see also PE-I&S jobs.

Where licensure tends to matter most is in work that requires an engineer to sign or seal documents, or in organizations that value or require the PE designation for advancement. Whether that applies to you depends heavily on your sector and state.

Sequencing Your Preparation by Domain

Generic study advice is plentiful. What is specific to PE-I&S is that all five domains carry the same 14-21 question range, which argues for a balanced plan rather than a deep specialization in one or two areas. One reasonable ordering follows the logic of the domains themselves.

For a complete plan with resource recommendations, see our PE-I&S study guide. When you are ready to test yourself under realistic conditions, our PE-I&S practice tests let you work through questions in the same mix of formats you will see on exam day, and you can return to the main practice test site to track your progress across all five domains.

Frequently Asked Questions