ISTQB CTFL Exam Format Explained: Questions, Time, Pass Mark

Mike K — Sat, 24 Oct 2026 12:24:47 +0000

The ISTQB Certified Tester Foundation Level (CTFL v4.0) exam is a 60-minute, closed-book test of 40 multiple-choice questions, and you pass at 65%, or 26 of the 40 available points. Every question is worth exactly one point, there is no negative marking, and the questions are drawn from the six chapters of the official v4.0 syllabus. Almost everything else people argue about on forums hangs off those four numbers, so it is worth getting them straight before you open a single practice question.

The exam in four numbers

40 questions, one point each, so 40 points maximum.
26 correct answers to pass, which is 65%.
60 minutes, or 75 if you sit the exam in a language that is not your native language.
0 penalty for a wrong answer.

How many questions are on the ISTQB Foundation exam?

Exactly 40 multiple-choice questions. There are no essays, no coding tasks and no live practical exercises. The entire exam is selectable answers.

Most questions have a single best answer: you choose one option.
A small number explicitly state that more than one answer is correct, for example "select TWO". On those you earn the point only if every required part is right. There is no partial credit.
The exam is closed-book: no notes, no books, no devices.

How long is the exam, and do non-native speakers get extra time?

The standard limit is 60 minutes. If you sit the exam in a language that is not your native language, you receive an extra 25%, so 75 minutes. That allowance is written into ISTQB's own exam rules, not a favour granted by individual providers, though you normally have to request it when you register rather than on the day.

Sixty minutes across 40 questions averages about 90 seconds per question. That is comfortable for recall questions and tighter than it looks for the apply-level ones that need a short calculation or a small diagram. More on that below, because ISTQB has published its own view of where the minutes go.

What the 65% pass mark actually means

The pass mark is 65%, and because every question carries exactly one point, that converts to a plain count: 26 correct out of 40. There is no scaling, no weighting and no separate per-chapter minimum. You can get every question in one chapter wrong and still pass comfortably.

This is worth stressing because it is not how the Advanced Level exams work. On CTAL-TA, for example, 45 questions are worth 78 points, because questions are weighted by cognitive level. At Foundation, questions and points are the same number, which makes the arithmetic during the exam trivial: count the ones you are confident about.

There is also no negative marking. A blank answer and a wrong answer cost you exactly the same, so leaving anything unanswered is a pure loss. Answer all 40, even if the last few are educated guesses. Computer-based exams typically show a provisional pass/fail on screen as soon as you submit, with the formal result arriving from the provider afterwards.

Which cognitive (K) levels does the exam test?

CTFL v4.0 tests three cognitive levels, and every learning objective in the syllabus is tagged with the level expected of you:

K1 (remember): recall a term or fact, such as a definition from the ISTQB glossary.
K2 (understand): explain, compare or classify concepts. This is where most of the exam sits.
K3 (apply): apply a technique for real, for example derive boundary values, complete a decision table, build a state transition table.

Across the 40 questions the published split is 8 K1, 24 K2 and 8 K3. So three-fifths of the paper is comprehension, one-fifth is recall, and one-fifth is work you have to do with a pen.

How are the 40 questions distributed across the syllabus?

The questions are spread across the six chapters in proportion to the learning objectives each chapter carries:

#	Chapter	Questions	Points
1	Fundamentals of Testing	8	8
2	Testing Throughout the Software Development Lifecycle	6	6
3	Static Testing	4	4
4	Test Analysis and Design	11	11
5	Managing the Test Activities	9	9
6	Test Tools	2	2
	Total	40	40

Two chapters carry half the paper: chapter 4 (11 questions) and chapter 5 (9). Chapter 6 carries two. If you are budgeting study time by chapter count, that ratio is the budget.

The K3 questions are concentrated even harder. All eight of them live in chapters 4 and 5, five and three respectively. Chapter 4 is also the only chapter in the whole exam with no K1 question at all: its eleven questions break down as 0 K1, 6 K2 and 5 K3. In other words, the chapter with the most questions is also the chapter where you cannot pick up a point by simply having read the definition.

What ISTQB's own timing model says about the clock

The exam structure tables do not just count questions, they assign an expected time per cognitive level: one minute for a K1 question, one minute for a K2, three minutes for a K3. Run that over the actual split and you get 8 + 24 + 24 = 56 minutes of a 60-minute exam.

Four minutes of slack. That is the real reason people run out of time, and it is not the reading. The clock is consumed by the eight K3 questions, and the only way to make those cheaper is to have done boundary value analysis, equivalence partitioning, decision tables and state transition testing by hand often enough that they are mechanical. If a K3 question takes you five minutes, you have already borrowed from two other questions.

What actually happens on exam day?

The exam is delivered by an ISTQB member board or an accredited exam provider, either at a test centre or as a remotely proctored online session. You confirm your identity, the proctor checks your environment, the timer starts, and you may flag questions and revisit them before submitting.

One thing worth knowing, because it causes a lot of confused forum threads: ISTQB publishes the exam structure, the pass mark and the language allowance, and essentially nothing else about exam-day logistics. Retake intervals, fees, whether you may bring a calculator, whether scratch paper is allowed, whether a paper dictionary is permitted: none of that is in ISTQB's own rules. It is set by your member board or exam provider, and it genuinely differs between them. Read your provider's exam-day page before you book, and do not take a rule from a blog post as universal, including this one.

The mandatory rules and the question style come straight from the official ISTQB CTFL syllabus and sample exams, which are free to download. Working the official sample paper end to end is the cheapest calibration available.

Can you retake the exam if you fail?

Yes. There is no cap on attempts. You pay the exam fee each time, and your provider may set a short waiting period between attempts.

Here is the pattern worth planning around: because there is no negative marking and 65% is an achievable bar, candidates who consistently score 75% or higher on full-length, timed mock exams tend to pass on the first attempt. The mock score under exam conditions is a far better predictor than the number of hours you have read. Build the reading first, then rehearse at full length (40 questions, 60 minutes, no notes) until 75% is normal rather than lucky.

Quick answers

How many questions are on the ISTQB Foundation Level exam?
Exactly 40 multiple-choice questions, each worth one point, in 60 minutes.

What score do you need to pass the CTFL exam?
65%, which is 26 correct answers out of 40. There is no negative marking.

How long is the ISTQB Foundation exam?
60 minutes as standard, or 75 minutes if you take it in a language that is not your native language.

Is there negative marking on the ISTQB exam?
No. A wrong answer and a blank answer score the same, so answer every question.

Can I use a calculator in the exam?
ISTQB does not publish a rule on this. It is set by your exam provider, and providers differ. Check their exam-day rules before you book. The arithmetic in CTFL K3 questions is light either way.

How many times can I retake the CTFL exam?
There is no limit on attempts, but you pay the exam fee again for each retake.

The short version

CTFL v4.0 is 40 questions, 60 minutes, 26 to pass, no negative marking and three cognitive levels. The questions lean hard on chapters 4 and 5, all eight apply-level questions live there, and ISTQB's own timing model spends 56 of your 60 minutes. Know that shape, answer every question, and practise the K3 techniques by hand under the clock.

I write and review practice exams and study guides at ExamCaliber. Every question is original, mapped to the current v4.0 syllabus, and carries a written rationale on every answer option.

Written with AI assistance; facts checked against the ISTQB syllabus and exam structure tables by the author.

DEV Community: Mike K