How Many Mistakes Can You Make in the DGT Theory Exam?
Short answer: three. You can make a maximum of 3 mistakes on the 30-question DGT theory exam. Here's the detail and how to make sure you stay well inside the limit.
The exact rule
The Permiso B theory exam has 30 questions and you must answer at least 27 correctly. That means a maximum of 3 mistakes — a 90% pass mark, one of the toughest in Europe. You have 30 minutes.
Why the 3-mistake limit trips people up
With only three mistakes allowed, careless errors matter as much as knowledge gaps. The most common avoidable mistakes are misreading the question (especially negatives like 'which is NOT correct') and rushing. Foreigners face an extra risk from the awkward official English translation.
How to stay under 3 mistakes
- Practise until you pass full mock exams with 0–1 mistakes — that gives you a safety margin.
- Read every question twice and watch for negatives.
- Answer all 30 — never leave a blank.
- Learn the rules so translation ambiguity can't cost you a point.
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Frequently asked questions
How many mistakes are allowed in the DGT theory test?
A maximum of 3 mistakes out of 30 questions. You need 27 correct to pass.
What is the DGT pass mark?
90% — 27 of 30 questions correct.
Do unanswered questions count against me?
Yes, a blank counts as a wrong answer, so always answer every question.
How long is the exam?
30 minutes for 30 questions.