- What the AGI Exam Actually Tests
- Registration, Fees, and Scheduling Mechanics
- The 16 Domains, Ranked by Study Priority
- Question Format and Test-Day Structure
- A Domain-Specific Study Timeline
- Who Actually Hires AGI Holders
- Mistakes That Sink First Attempts
- AGI vs. Basic Ground Instructor
- Frequently Asked Questions
- The AGI knowledge test has 100 scored questions, a 2 hour 30 minute limit, and a 70% passing score.
- The PSI test fee is $175 plus tax, and no instructor endorsement is required for a first attempt.
- All 16 AGI domains mirror the commercial pilot knowledge areas in 14 CFR 61.125(b), plus material from 61.97, 61.105, 61.155, and 61.309.
- You can sit for the test at 16, but certificate issuance requires being 18 and passing the Fundamentals of Instructing test.
What the AGI Exam Actually Tests
The Advanced Ground Instructor knowledge test isn't a watered-down pilot exam - it's a commercial-level academic test with zero flight-experience prerequisite. The FAA built the AGI content bank directly from the commercial pilot knowledge areas listed in 14 CFR 61.125(b), then layered in references from 61.97 (instrument rating knowledge), 61.105 (private pilot knowledge), 61.155 (airline transport pilot knowledge), and 61.309 (ground instructor knowledge). That means you're being tested on commercial-pilot-depth material without ever having flown a commercial maneuver.
This distinction matters for how you prepare. A generic "aviation trivia" approach will not get you through 100 scored multiple-choice questions in the allotted window. You need domain-by-domain mastery, which is exactly what our companion resource, the AGI Exam Domains 2026: Complete Guide to All 16 Content Areas, breaks down in more depth than we have room for here.
Registration, Fees, and Scheduling Mechanics
The FAA delegates AGI test administration to PSI. Here's what the paperwork and logistics actually look like:
- Test fee: $175 plus applicable tax, paid directly to PSI at scheduling.
- Minimum testing age: 16 - you can sit for and pass the knowledge test years before you're eligible for the certificate itself.
- Certificate issuance age: 18, along with English language proficiency and a passing score on the Fundamentals of Instructing test (unless you qualify for an exemption).
- No endorsement needed: Unlike many FAA knowledge tests, your first AGI attempt requires no instructor sign-off.
- No flight requirements: There's no pilot certificate, medical certificate, flight time, or practical test tied to AGI - it's purely a knowledge credential.
For a full cost breakdown including retake fees, study materials, and Fundamentals of Instructing expenses, see AGI Certification Cost 2026: Complete Pricing Breakdown. And if you're still confirming basic eligibility before you spend the $175, our AGI Requirements 2026: Eligibility, Prerequisites & How to Qualify guide walks through every prerequisite in order.
Key Takeaway
Schedule your PSI test date only after you've completed at least one full pass through all 16 domains - rescheduling is far cheaper than re-paying the $175 fee for a failed attempt.
The 16 Domains, Ranked by Study Priority
Not all 16 domains carry equal weight in terms of study time required. Some are narrow and fact-based; others are broad, computation-heavy, or conceptually dense. Below is how serious candidates should triage their prep.
Domain 6: Weight and Balance Computations
This is the domain most likely to cost you points if you skip practice problems. You need to be fluent with moment calculations, center-of-gravity envelopes, and loading scenarios - not just definitions.
- Practice multiple loading configurations, not just one aircraft type
- Memorize how CG shifts affect stall speed and stability
Domain 3: Basic Aerodynamics and Principles of Flight
Expect questions on lift, drag, load factor, stall behavior, and turning flight. This domain underlies several others, including performance limitations and emergency procedures.
- Understand the relationship between angle of attack and stall regardless of airspeed
- Know how load factor changes in coordinated turns and steep bank angles
Domain 4: Meteorology
Windshear recognition, critical weather patterns, and interpretation of METARs, TAFs, and other aeronautical weather products dominate this domain. Expect scenario-based questions rather than pure definitions.
- Practice reading raw METAR/TAF strings until decoding is automatic
- Study the mechanics of low-level windshear near thunderstorms and frontal boundaries
Domain 1: Applicable Federal Aviation Regulations
This domain draws on commercial pilot privileges, limitations, and operational regulations. You don't need to memorize the entire FAR, but you must know the regulations that govern commercial flight operations cold.
- Focus on Part 61 and Part 91 sections tied to commercial privileges
- Cross-reference NTSB accident reporting rules (Domain 2) since the two are often tested together
The remaining domains - safe aircraft operation, performance charts, performance limitations, aeronautical charts and dead reckoning, air navigation facilities, ADM, aircraft systems, maneuvers and emergency procedures, night/high-altitude operations, national airspace procedures, and lighter-than-air training procedures - round out the test bank. A deeper walkthrough of all 16, with sample question angles for each, is available in AGI Exam Domains 2026: Complete Guide to All 16 Content Areas.
Question Format and Test-Day Structure
The AGI knowledge test consists of 100 scored multiple-choice questions, though PSI may include additional unscored validation questions mixed in that you won't be able to identify during the test. You get 2 hours and 30 minutes total, and a 70% score is required to pass.
Because you can't tell scored questions from unscored ones, the only reliable strategy is to treat every question as if it counts. Pacing matters: with 150 minutes for up to roughly 100+ questions, you have a comfortable buffer if you've studied properly, but that buffer disappears quickly if you get stuck rereading unfamiliar charts or regulatory citations.
| Exam Detail | Specification |
|---|---|
| Scored questions | 100 multiple-choice |
| Additional questions | Unscored validation items may be included |
| Time allowed | 2 hours 30 minutes |
| Passing score | 70% |
| Test fee | $175 plus applicable tax |
| Test provider | PSI |
For a precise breakdown of how the 70% threshold is calculated and what it means for how many questions you can miss, read AGI Passing Score 2026: Exactly What You Need to Pass. If you want a broader sense of how the exam compares to other FAA knowledge tests in terms of difficulty, How Hard Is the AGI Exam? Complete Difficulty Guide 2026 covers that directly, and AGI Pass Rate 2026: What the Data Shows puts the FAA's own testing statistics in context.
A Domain-Specific Study Timeline
Generic study techniques - spaced repetition, timed practice blocks, active recall - only help if you're applying them to the right material at the right time. Here's how to sequence six weeks of prep around the AGI domain structure specifically.
Regulatory Foundation
- Domain 1 (commercial pilot FARs) and Domain 2 (NTSB accident reporting)
- Build a reference sheet of reportable events and notification timelines
Aerodynamics and Systems
- Domain 3 (aerodynamics) and Domain 12 (aircraft systems)
- Drill stall/spin theory and load factor math until it's automatic
Weather and Performance
- Domain 4 (meteorology) paired with Domain 7 (performance charts) and Domain 8 (performance limitations)
- Decode real METARs/TAFs and run practice weight-and-balance problems daily
Navigation and Airspace
- Domain 9 (charts and dead reckoning), Domain 10 (navigation facilities), Domain 15 (National Airspace System procedures)
- Practice plotting courses and identifying airspace classifications on sectional excerpts
Judgment and Special Operations
- Domain 11 (ADM), Domain 13 (maneuvers/emergencies), Domain 14 (night/high-altitude), Domain 16 (lighter-than-air)
- Review scenario-based questions that test decision sequences, not just facts
Full Review and Timed Simulation
- Run full-length timed practice exams under real 2 hour 30 minute conditions
- Revisit weak domains identified from missed questions before scheduling with PSI
This sequencing is a companion to the broader prep framework in our AGI Study Guide 2026: How to Pass on Your First Attempt, and it pairs well with condensed review tools like the AGI Cheat Sheet 2026: One-Page Review of Must-Know Facts during your final week.
Who Actually Hires AGI Holders
AGI privileges extend across Part 61 ground training and knowledge-test endorsement for every subject except instrument-rating topics - a meaningful distinction from the Basic Ground Instructor certificate, which is limited to private pilot and recreational pilot ground instruction. That broader scope is what makes AGI attractive to flight schools, part-time ground school instructors, and career-transition candidates who want to teach commercial-level ground subjects without pursuing a full CFI.
Because the certificate never expires - though exercising its privileges requires qualifying instructional activity, an approved refresher course, or a proficiency endorsement within the preceding 12 calendar months - many holders use it as a flexible side credential alongside other aviation work. If you're weighing whether the time and $175 fee are worth it for your career goals, Is the AGI Certification Worth It? Complete ROI Analysis 2026 and AGI Salary Guide 2026: Complete Earnings Analysis both dig into the practical payoff, while AGI Jobs surveys where the credential actually gets used in the field.
Mistakes That Sink First Attempts
- Treating it like a private pilot review: The commercial-level source material in 61.125(b) means questions go deeper than private pilot written exam content.
- Skipping computation practice: Weight and balance and performance chart questions require worked problems, not flashcards.
- Ignoring the lighter-than-air domain: Domain 16 is easy to overlook but still appears on the test bank and shouldn't be left to guesswork.
- Underestimating regulatory cross-references: Questions frequently combine Domain 1 regulations with Domain 2 NTSB reporting rules in the same scenario.
- Not simulating the full 2.5-hour block: Pacing under real time pressure is different from casual question review.
AGI vs. Basic Ground Instructor
Candidates often ask how AGI stacks up against the Basic Ground Instructor (BGI) certificate before deciding which to pursue. The core difference is scope of privileges, not difficulty of the registration process.
| Feature | AGI | BGI |
|---|---|---|
| Ground training scope | Part 61 training and knowledge-test sign-offs, all subjects except instrument-rating topics | Private and recreational pilot subjects only |
| Knowledge source material | Commercial pilot knowledge areas (61.125(b)) plus 61.97, 61.105, 61.155, 61.309 | Private/recreational pilot knowledge areas |
| Test fee | $175 plus tax | Set separately, typically lower question volume |
| Minimum age for testing | 16 | 16 |
If you're still deciding between certificates, start with the fundamentals covered in AGI Certification and What Is AGI Certification? before committing to a study plan.
Before you lock in a test date, double-check the current PSI testing calendar and any regional seat availability - our AGI Exam Dates 2026: Testing Windows, Deadlines & Scheduling guide covers scheduling logistics in detail. And once you're ready to gauge your readiness under realistic conditions, running full-length simulations on our AGI practice test platform is the closest you'll get to the actual PSI test-day experience before paying the $175 fee. If terminology like "AGI," "AGI meaning," or "ground instructor" still feels unfamiliar, our foundational explainers - What Is AGI?, AGI Meaning, What Does AGI Stand For?, and What Is A AGI? - are good starting points before you dive into domain-level study.
Frequently Asked Questions
No. AGI has no pilot certificate, medical certificate, flight experience, or practical test requirement. It is purely a knowledge-based credential administered through PSI.
There are 100 scored multiple-choice questions, with possible additional unscored validation questions mixed in, and you have 2 hours and 30 minutes to complete the test.
Yes. The minimum age to sit for the knowledge test is 16. However, certificate issuance requires you to be 18, demonstrate English proficiency, and pass the Fundamentals of Instructing test unless exempt.
The certificate itself does not expire. But to exercise its privileges, you need qualifying instructional activity, an approved refresher course, or a proficiency endorsement within the preceding 12 calendar months.
No. AGI privileges cover Part 61 ground training and knowledge-test recommendations for nearly all subjects except instrument-rating knowledge areas.