FE Exam vs PE Exam: The Difference, Which You Take First, and the Path to Licensure

The FE exam is the first step toward engineering licensure and the PE exam is the last one. You take the FE (Fundamentals of Engineering) near the end of your engineering degree or shortly after graduating. It is a pass/fail exam with 110 questions inside a 6-hour appointment, and passing it makes you an EIT or Engineer Intern. The PE (Principles and Practice of Engineering) exam comes years later, usually after about four years of qualifying engineering experience under a licensed PE, and passing it is what actually makes you a Professional Engineer. In most states you have to pass the FE and register as an EIT before you are allowed to sit for the PE at all.

What is the FE exam?

The FE is NCEES's entry-level exam. It covers the fundamentals you learned across an engineering curriculum: math, statics, dynamics, thermodynamics, circuits, ethics, engineering economics, and the core topics of your chosen discipline. It is computer-based, offered year round at Pearson VUE test centers, and costs $225.

The appointment runs 6 hours total, but you are not answering questions for all of it. The clock breaks down like this: 2 minutes for the nondisclosure agreement, 8 minutes for the tutorial, 5 hours and 20 minutes of actual testing, and a 25-minute scheduled break. So the real work is a little over five hours, split across two halves with the break in the middle.

You pick one of seven discipline exams: Chemical, Civil, Electrical and Computer, Environmental, Industrial and Systems, Mechanical, or Other Disciplines. Other Disciplines is the general option for people whose degree does not map cleanly to the other six, or who simply want the broadest coverage.

One detail that surprises a lot of first-timers: you do not bring a reference book. NCEES supplies the FE Reference Handbook on screen, in a searchable panel next to the questions. Everything you are expected to look up is in there. That is a gift and a trap at the same time. The gift is that you do not have to memorize equations. The trap is that searching for an equation you have never used before, while the clock runs, is painfully slow. The students who do well have already practiced with the handbook enough that they know roughly where things live.

How is the FE scored?

Pass or fail. That is the entire result. NCEES does not publish a numeric score, there is no percentile, and there is nothing to put on a resume beyond "passed." You get a diagnostic report if you fail, showing your relative performance by topic, which is useful for planning a retake. But nobody will ever ask you what you scored, because there is no number to ask about.

Recent first-time pass rates run roughly 60% to 75% depending on the discipline. That is a meaningful failure rate for an exam most people take while they still remember the material, which tells you something: the FE is not conceptually brutal, but it is broad, and the pace is unforgiving. Roughly three minutes per question, across every subject you took in four years.

What is an EIT or EI?

Once you pass the FE and apply to your state board, you are typically designated an EIT (Engineer in Training) or an EI (Engineer Intern). The title varies by state, the meaning does not. It is a formal marker that you cleared the fundamentals exam and are now accumulating the experience you will need to apply for full licensure.

An EIT cannot sign or seal engineering documents. It is not a license. What it is, practically, is a checkbox that some employers (especially civil, structural, and public-sector firms) want to see on an entry-level resume, and a required prerequisite for the PE later.

What is the PE exam and when do you take it?

The PE exam is discipline-specific and much narrower than the FE. Instead of testing everything you learned, it tests whether you can practice competently in the field you have actually been working in. You take it after you have real experience, not before.

The usual path in most states: pass the FE, register as an EIT, work about four years of progressive engineering experience under the supervision of a licensed PE, then apply to your state board to sit for the PE exam in your discipline. "Progressive" matters. Boards want to see that your responsibility grew, not that you did the same drafting task 200 times.

Because licensure is granted by your state board and not by NCEES, the exact requirements vary. Some states count a master's degree toward the experience requirement. Some have different rules for candidates from non-ABET-accredited programs. Some let you take the PE exam before you have finished the experience (a "decoupled" model) and simply hold your license until the years are complete. Check your own state board before you plan anything around a specific date. NCEES administers the exams, but your state decides what a license costs you.

FE vs PE: the direct comparison

Notice what is not in that table: PE question counts, fees, and pass rates. Those change and they differ by discipline, so pull them from NCEES directly rather than from a blog. The structural difference between the two exams is stable. The numbers around the PE are not.

Which exam do you take first?

The FE, essentially always. In most states you cannot even apply to sit for the PE without an FE pass on file. The exception is a small number of states that allow long-experience candidates to waive the FE, and those waivers are narrow and slow. If you are a student or a recent graduate reading this, the answer is simple: take the FE now, while the fundamentals are still fresh. Every year you wait makes it harder, because you will be reviewing thermodynamics you have not touched since junior year.

The most effective FE prep is not re-reading textbooks. It is working problems under time pressure with the reference handbook open, then reviewing every miss until the mistake stops repeating. If your studying is built on old course notes and lecture slides, turn them into questions instead of just rereading them: generate an FE exam practice test from your own material so you are testing recall on the exact topics your program covered.

Does every engineer need a PE license?

Honest answer: no. A large share of working engineers never get licensed and their careers are fine. If you work in manufacturing, semiconductors, aerospace, software-adjacent hardware, or most product engineering roles, the PE rarely comes up. The industrial exemption in many states lets companies employ engineers who work under the company's own review process without individual licensure.

Where the PE genuinely matters is anywhere you take professional responsibility for work that affects public safety. Civil and structural engineering, consulting firms, public works, land development, MEP design for buildings, geotechnical work, and anything municipal. In those fields, a licensed PE is the person who takes legal responsibility for drawings that have to be signed and sealed before they go out, and that authority is the whole point of the license. An unlicensed engineer can do the calculations. Only a PE can put the seal on them.

It also matters for independent practice. If you ever want to consult on your own, sign off on your own work, or start a firm, the PE is the thing that makes it legal. Plenty of engineers get licensed purely as an option they might want later, which is a reasonable reason on its own.

What does a realistic timeline look like?

A typical path: take the FE during your senior year or in the months after graduation, since that is when the material is freshest. Pass it, apply to your state board, and get your EIT designation. Then work for roughly four years under a licensed PE, taking on progressively more responsibility and keeping careful records of your projects, because your board will want a detailed experience log and references from licensed engineers who supervised you.

Somewhere in year three or four, start PE review. The PE is narrow but deep, and it tests judgment about practice, not just formulas. Then apply, sit for the exam, and if you pass, your state board issues the license. Start to finish, five to six years from graduation is a normal arc. It is slower if you switch employers into a role where nobody licensed can vouch for your work, which is worth thinking about early if licensure is your goal.

The bottom line

The FE is broad, early, pass/fail, and yours to take as soon as you can. The PE is narrow, late, and gated on years of supervised experience. Take the FE while the coursework is still in your head, register as an EIT, then decide over the next few years whether your field actually needs the seal. Confirm every requirement with NCEES and your own state board, because the state is the one that grants the license. And if you are studying now, stop rereading and start testing: build an FE exam practice test from your own notes and work problems until the misses stop.