Commercial Pilot Airplane Knowledge Test

What is it?

What exactly is the Commercial Pilot Airplane Knowledge Test?

Commercial Pilot Airplane Knowledge Test — Transportation, Aviation & Maritime credential from Federal Aviation Administration

100-question test on commercial privileges, complex aircraft systems, performance charts and Part 135 rules for paid flying. Offered by Federal Aviation Administration, it is designed for candidates who need to demonstrate verified competence in the Transportation, Aviation & Maritime field. The credential is commonly used for career entry, advancement, regulatory compliance, or employer requirements. Candidates should review the official handbook for eligibility, exam format, and scoring before registering.

The path in brief

1. Confirm you meet any eligibility or prerequisites
2. Review the official handbook and study materials
3. Register and pay through the awarding body or authorized provider
4. Schedule and take the exam (test center or online proctoring)
5. Receive your score and, if passed, your credential

Before you book

Who is eligible to sit the Commercial Pilot Airplane Knowledge Test?

Eligibility varies; many credentials are open to all, while others require coursework, work experience, or sponsorship.

Who it is for: Professionals and candidates seeking to validate Transportation, Aviation & Maritime competence.

The test itself

What is the format of the Commercial Pilot Airplane Knowledge Test?

The Commercial Pilot Airplane Knowledge Test is administered by Federal Aviation Administration and runs 3 hours and contains 100 questions.

The fine print

What are the retake and renewal rules for the Commercial Pilot Airplane Knowledge Test?

Proctoring & delivery

Proctored, computer-based delivery (test center or remote online proctoring), varying by exam.

Retake policy

Varies by credential — most bodies permit retakes after a waiting period and full or partial fee.

Score reporting

Scores are reported per the body’s timeline, typically electronically after the exam.

Recertification

Varies; many credentials require renewal every 2–3 years via continuing education or a recertification exam.

What it pays

How much does this credential pay?

$122,670 median for commercial pilots (BLS, May 2024) — SOC 53-2012

The direct answer is that commercial pilots earned a median of $122,670 per year in May 2024, the most recent BLS Occupational Employment and Wage Statistics survey, and the figure belongs to SOC 53-2012, Commercial Pilots. That number needs two careful readings before it is used to plan a career. First, the OOH page that carries it is titled "Airline and Commercial Pilots" and covers both the airline side (airline pilots, copilots and flight engineers, median $226,600) and the commercial side ($122,670); the commercial-pilot median is the one relevant to a newly certificated CAX holder, and it is roughly half the airline figure because the airline number is dominated by senior, degree-holding captains at the majors. Second, the commercial-pilot median itself is pulled upward by high-time charter, air-ambulance and corporate pilots, so the typical first-year commercial pilot working as a flight instructor or entry charter pilot is below the median, not at it. The realistic distribution is a long, steep ladder: the lowest 10 percent of commercial pilots earned less than $56,260 and the highest 10 percent more than $168,700 in the same survey family, and the climb from one end to the other is largely a function of flight hours, instrument currency and turbine time rather than the certificate itself. The CAX knowledge test is therefore best understood as a gate into a flight-hour-building career rather than a wage catalyst: it is what you pass on the way to the commercial checkride, and the pay follows the hours and the type ratings you accumulate afterward. Overall employment of airline and commercial pilots is projected to grow 4 percent from 2024 to 2034, about as fast as the average for all occupations, with roughly 18,200 openings a year driven mostly by retirements and transfers. The demand pattern favours pilots who build hours efficiently and move toward the airline seats, which is why the practical advice around the CAX is to pair passing the knowledge test with an efficient time-building plan rather than treating the written as an end in itself.

Job growth.4% projected change 2024-34 (about as fast as average), with ~18,200 openings a year dominated by retirements; earnings climb steeply with flight hours, instrument currency and turbine time, not with the certificate itself

Source: BLS Occupational Outlook Handbook — Airline and Commercial Pilots

Your schedule

How long should I study for it?

40-70 hours of ground study over 6-10 weeks of focused study

Plan 6 to 10 weeks for the CAX knowledge test, working from the premise that it is a gate, not the destination: the certificate it feeds requires a private pilot certificate and 250 hours of flight time for the airplane category before the commercial checkride, so the written should be timed to stay valid — the knowledge test report is good for 24 calendar months — rather than taken years before the flight experience is complete. The test itself is computer-delivered at PSI testing centres, presents 100 questions in 2.5 hours, and draws every item from the Airman Certification Standards, FAA-S-ACS-7A, the current Commercial Pilot Airplane ACS; the knowledge column of each ACS task defines exactly what can be asked. Start with the FAA's own material because it is free and authoritative: the Pilot's Handbook of Aeronautical Knowledge, the Airplane Flying Handbook, and the Commercial Pilot Airplane ACS document itself. Work the ground school in the order the ACS organizes it — regulations and commercial pilot privileges, aerodynamics and performance (with particular weight on the complex-aircraft and performance-chart questions that are absent from the private written), weather, weight and balance, cross-country planning, and aeromedical factors — and then switch to a current question bank for two to three weeks of repetition, because the FAA written rewards pattern recognition of the fixed question bank even while it tests understanding of the underlying concepts. Aim to score 85 percent or better on consecutive practice exams before scheduling, not the 70 percent minimum, because the DPE will probe every ACS area you missed on the report. The one scheduling constraint is the endorsement: under § 61.35 you must present either a graduation certificate from an FAA-approved ground school or a written statement from an authorized instructor that you completed a ground training or home-study course and are prepared, so line that up before booking the seat. Budget roughly $175 for the knowledge test itself, plus the ground-school course or book and question-bank costs, and remember the real money in this certification is the flight time and the checkride, not the written.

1. Weeks 1-26-8 hrs/week

   Regulations, privileges, and the ACS structure

   • Download and read the Commercial Pilot Airplane ACS (FAA-S-ACS-7A) cover to cover — the knowledge column is the test blueprint
   • Study 14 CFR Parts 61, 91 and the commercial-relevant sections of 119 and 135, focusing on commercial privileges and limitations
   • Take a full-length practice exam cold to establish your baseline and weak ACS codes
   • Set up the free FAA handbooks as your reference layer
2. Weeks 3-48-10 hrs/week

   Aerodynamics, aircraft systems, and performance

   • Study the aerodynamics chapters of the Pilot's Handbook of Aeronautical Knowledge — this is where commercial written items get harder than the private written
   • Learn complex-aircraft systems: retractable gear, constant-speed propellers, manifold pressure, and their failure modes
   • Drill performance charts, takeoff and landing distance, density altitude, and weight and balance calculations
   • Work every calculation problem twice — once for understanding, once for speed
3. Weeks 5-68-10 hrs/week

   Weather, navigation, and cross-country planning

   • Study weather theory and services, including how to read the aviation weather products used on the test
   • Practise cross-country flight planning items: time, fuel, and checkpoints for a commercial-style trip
   • Cover airspace and ATC procedures at the depth the ACS requires for commercial operations
   • Begin timed practice-exam sessions on the sections you have completed
4. Weeks 7-810-12 hrs/week

   Question-bank mastery and weak-code closure

   • Work the question bank daily, logging every miss against its ACS code
   • Return to the handbook chapters behind any code you miss more than twice
   • Take full-length timed practice exams; hold yourself to 85% or better before scheduling
   • Memorise the fixed facts (weather minimums, oxygen and equipment requirements, currency rules) that recur verbatim
5. Final week6-8 hrs

   Endorsement, scheduling, and taper

   • Obtain the required § 61.35 instructor endorsement or ground-school graduation certificate
   • Schedule the test at a PSI centre; confirm the fee and the exact start time
   • Two more timed practice exams scored 85%+; review every miss
   • One light review day, then rest — the written rewards a fresh mind over a crammed one

What to buy

Which study resources are worth paying for?

The buying decision here is unusual because the single most authoritative source is free: the FAA publishes the Pilot's Handbook of Aeronautical Knowledge, the Airplane Flying Handbook, and the Commercial Pilot Airplane ACS, and every test question traces to the ACS, so a candidate can build the entire study foundation without spending anything. The money should go to a current question bank and, if you are not using a flight school's ground course, a structured ground-school course — and the critical check before any purchase is currency, because the FAA rotates the question bank and updates the ACS by edition, so a book that has not been updated in the last year or two will teach you retired questions and wrong emphases, which is the most common way candidates waste money in this certification. Prices below are list prices in USD checked at the time of writing: the FAA knowledge test itself is about $175 at a PSI centre, ground-school courses run roughly $200-500, current question banks run about $40-120, CFI ground sessions run about $50-80 an hour, and the checkride fee charged by the designated pilot examiner is separate and substantially larger than everything on this table combined. The comparison that matters most is the value-per-hour one: the free FAA handbooks and the free ACS deliver the majority of the score, the question bank delivers the repetition that converts knowledge into a written pass, and the paid course is mainly a convenience for candidates who need structure rather than a necessity. Budget for the $175 test fee and a realistic retest possibility rather than the full course stack, and remember that the real money in the commercial certification sits in the flight time and the checkride — a candidate should spend on hours in the aircraft before spending on premium prep bundles.

Prices checked 2026-08 in USD before tax; FAA test fees and question-bank prices change, and DPE checkride fees are set by the examiner. Confirm currency of any book or bank against the current ACS edition before buying. We do not rank by commission.

What you'll face

What question types will I see?

The CAX is a computer-delivered, closed-book test of 100 multiple-choice questions with exactly three answer choices each, allotted 2.5 hours under the current FAA testing matrix, and scored at 70 percent correct with no penalty for guessing. Every question traces to the knowledge column of the Commercial Pilot Airplane ACS (FAA-S-ACS-7A), and the score report maps each miss to its ACS code. The items break into three practical families: direct-knowledge questions that test a fixed regulation, weather minimum, or equipment requirement; calculation questions that demand weight-and-balance, performance, or time-and-fuel arithmetic (often with an E6-B or CX-3 flight computer); and scenario questions that describe a flight situation and ask for the correct decision or next action. The direct-knowledge items are the free points and should be answered briskly; the calculations are the time sinks and should be flagged and worked deliberately; the scenario items reward having a real decision-making framework rather than a memorised rule. Because every question is equally weighted at one point, a candidate who rushes the last twenty questions to protect time on the first ten has made an arithmetic error: 70 correct answers out of 100 is the pass line, and an unanswered question scores identically to a wrong one, so the discipline is to leave nothing blank. The practical pacing target is roughly one minute per question with a reserve for the calculation items, and the report you leave with — the AKTR with its ACS codes — is the single most useful study artefact if you must retake, because it tells you exactly which learning statements to repair.

Samples are editor-written illustrations of the published blueprint, not live exam items.

Reference

What are the key facts about the Commercial Pilot Airplane Knowledge Test?

Commercial Pilot Airplane Knowledge Test is a exam credential; awarded by Federal Aviation Administration; the exam fee is ~$175; typical preparation is 50-70 hours (written prep ~25-35 hours + flight training); holders typically earn $50,000-$160,000 (53-2012 median $122,670).

In short

Is the Commercial Pilot Airplane Knowledge Test worth it?

• Commercial Pilot Airplane Knowledge Test is awarded by Federal Aviation Administration.
• Validates job-ready competence in Transportation, Aviation & Maritime.
• Registration is through the awarding body or an authorized test provider.
• Renewal and retake policies vary — confirm before scheduling.

Worth comparing

How does the Commercial Pilot Airplane Knowledge Test compare with similar credentials?

• FAA Air Traffic Controller Selection Federal Aviation Administration

Trust

Where does this information come from?

Everything above is taken from the awarding body's own published material. Fees, question counts and domain weights are revised regularly — check the official page before you pay.

Research confidence: medium · Last reviewed 2026-08