PPL theory exams: everything about the 18-month exam window
The EASA 18-month exam window is a hidden trap for many PPL students. Without proper planning, you risk losing all your already-passed subjects. This article explains step by step how the system works and how to approach it smartly.
What is the 18-month window?
The moment you sit your first PPL theory exam, a clock starts. From that point, you have 18 calendar months to complete all remaining 8 (or 9) theory exams. If you fail to complete any subject in time, all previously passed subjects expire and you start from scratch.
EASA regulations are clear on this: the window closes on the date of the first exam attempt, plus 18 months. Extensions are not possible except in exceptional circumstances assessed by the national aviation authority.
Maximum 4 attempts per subject
You have a maximum of 4 attempts per subject. If you use all your attempts for one subject without passing, all other passed subjects also expire and you start with a completely clean slate.
Practically, this means: if you fail one subject on the first attempt, do not rush all remaining exams. Plan them carefully, because every missed opportunity counts.
The minimum passing score is 75%
You must complete each subject with at least 75% correct answers. There is no compensation between subjects: a 90% on Meteorology does not compensate a 70% on Navigation. Every subject must individually reach the 75% threshold.
How do you plan your exams wisely?
Start with easier subjects (Human Performance, Communications, Operational Procedures) to quickly build momentum. Save the hard subjects (Navigation, Performance & Planning, Aircraft General Knowledge) for later in your window: giving yourself more study time and preserving extra attempts if a subject proves difficult.
Use the UP Aviation Study Plan Generator: enter your country, start date and available study hours to receive a week-by-week schedule including exam deadlines.
When should you start studying?
Ideally, start studying before you sit your first exam. This keeps the full 18-month window ahead of you. Some students deliberately sit an "easy" first exam (e.g. Human Performance) to start the window while still studying the rest of the material. This can work, but requires discipline.
Conclusion
The 18-month window is strict but fair: provided you understand it. Plan your exams in advance, start with easy subjects, reserve enough time for Navigation and Performance, and track your attempts carefully. With the right guidance from UP Aviation, you have nothing to worry about.
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