Commercial Pilot Written Test Study Guide 2026

Your Complete Guide to the Commercial Pilot Knowledge Test

The FAA Commercial Pilot Knowledge Test is a critical step toward earning your commercial certificate. While it is not as demanding as the ATP knowledge test, a strong score demonstrates professional-level knowledge and sets the tone for your checkride. This guide covers everything you need to study, how to study it, and when to schedule your exam.

Test Overview

Subject Breakdown and Weighting

Key Topics by Subject

Regulations

Commercial pilot regulations differ from private pilot operations in important ways:

• Part 119: Certificate requirements for air carrier and commercial operations
• Part 135: On-demand operations, commuter operations, duty/rest requirements
• Commercial privileges and limitations: What you can and cannot do with a commercial certificate
• Medical requirements: Second-class medical standards and duration
• Recent experience requirements: Passenger-carrying currency including night requirements

Navigation

• VOR navigation: Radial tracking, station passage, DME arcs
• NDB/ADF navigation: Relative bearing, magnetic bearing, and tracking
• GPS navigation: RAIM, database currency, approach modes
• Cross-country planning: Time, fuel, distance calculations using E6B or electronic flight computer
• Diversion procedures: Estimating heading, distance, and fuel to an alternate

Weather

Focus on practical weather decision-making:

• Aviation weather reports: METAR, TAF, PIREP interpretation
• Weather charts: Surface analysis, significant weather prognostics, winds and temperatures aloft
• Hazardous weather: Thunderstorm avoidance, icing levels and types, turbulence categories
• Weather theory: Frontal systems, air masses, pressure systems, and stability

Performance

• Takeoff and landing performance charts -- Know how to read them for your aircraft category
• Density altitude effects -- Calculate and apply to performance planning
• Weight and balance -- Forward and aft CG limits, loading computations, fuel burn effects
• Climb and cruise performance -- Power settings, fuel flow, range and endurance calculations

The 6-Week Study Plan

Week 1: Regulations and Airspace

• Read FAR Parts 61, 91, and 135 commercial-relevant sections
• Create flashcards for numerical limits (speeds, altitudes, distances)
• Study airspace classes and requirements
• Take a diagnostic practice exam

Week 2: Navigation

• Review VOR, NDB, and GPS navigation principles
• Practice E6B calculations (time, speed, distance, fuel)
• Study cross-country planning procedures
• Work through 50 navigation practice questions

Week 3: Weather

• Study METAR and TAF interpretation
• Review frontal weather and air mass characteristics
• Learn to read prognostic charts and winds aloft
• Practice weather-related questions daily

Week 4: Performance and Systems

• Study takeoff and landing performance calculations
• Review weight and balance procedures
• Learn aircraft systems at the required depth
• Practice performance calculation questions

Week 5: Aerodynamics and Remaining Subjects

• Review load factor, maneuvering speed, and stall characteristics
• Study aeromedical factors, night operations, and emergency procedures
• Cover airport operations and NOTAMs
• Take two full-length practice exams

Week 6: Review and Test

• Focus on weak areas identified by practice exams
• Take at least two more full-length practice exams (score 85%+)
• Review commonly missed questions
• Schedule and take the exam

Study Resources

Test-Taking Strategies

Time Management

• 100 questions in 180 minutes = 1 minute 48 seconds per question
• First pass: Answer everything you know in 60-90 minutes
• Second pass: Work through flagged questions with remaining time
• Reserve 15 minutes for review of marked answers

Question Types

Calculation questions -- Work these carefully. Show your work on scratch paper. Common traps include unit conversions and reading the wrong line on a chart.

Regulation questions -- Pay attention to specific numbers. The difference between answers often comes down to one number (e.g., 1,000 feet vs 2,000 feet).

Scenario questions -- Read the entire scenario before looking at answers. Identify what is being asked and eliminate obviously wrong options.

Chart and diagram questions -- Take your time reading the chart. Many errors come from reading the wrong column or row.

Common Mistakes to Avoid

1. Confusing Part 91 and Part 135 rules -- The commercial test includes both. Know which applies in each scenario.
2. Weather minimums errors -- Class B, C, D, E, and G airspace all have different VFR minimums. Memorize them.
3. Performance calculation errors -- Always double-check your chart reading and interpolation.
4. Night operations confusion -- Night currency, lighting, and physiological considerations are commonly tested.
5. E6B mistakes -- Practice until calculations are automatic. The exam does not allow electronic flight computers in some testing centers.

After the Test

• Scores are available immediately at the testing center
• You receive a score report identifying weak areas
• Keep your test results -- you need them for the checkride
• If you scored below 80%, study the weak areas before your checkride
• Your instructor and DPE will focus on areas where you scored poorly

The Bottom Line

The commercial pilot knowledge test is your opportunity to demonstrate professional-level aviation knowledge. A high score reflects well on you during your checkride and tells your DPE that you take the profession seriously. Invest six weeks of consistent study, take plenty of practice exams, and aim for 85% or higher.

*Begin your commercial pilot exam preparation with our [free question bank](/tools/quiz) featuring hundreds of CPL-level questions, or use our [training cost calculator](/tools/cost) to plan your commercial certificate budget.*