Updated 3 Nov 2026 · 6 min read
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What the ISTQB CTFL v4.0 is and who it is for
The Certified Tester Foundation Level (CTFL) is the entry point to the ISTQB Certified Tester scheme. ISTQB describes it as the cornerstone of essential testing knowledge, covering the terminology and concepts used in testing worldwide, and relevant to Waterfall, Agile, DevOps and Continuous Delivery alike. It is also the prerequisite for every other ISTQB certification that requires Foundation Level.
ISTQB names a wide audience: testers, test analysts, test engineers, test consultants, test managers, user acceptance testers and software developers, plus people who need a basic understanding of testing, such as project managers, quality managers, business analysts and IT directors. There are no prerequisites and no prior knowledge is required to sit the exam, although ISTQB strongly recommends an accredited training course.
Version 4.0 was released on 21 April 2023 as a complete rewrite, not a merge of the old Foundation and Agile Tester syllabi. The syllabus you study is v4.0.1, an errata release dated 15 September 2024. The exam is still the CTFL v4.0 exam.
ISTQB CTFL v4.0 at a glance
| Item | Detail |
|---|---|
| Exam code | CTFL v4.0 |
| Questions | 40 multiple-choice questions, one point each |
| Time allowed | 60 minutes, or 75 minutes if the exam is not in your native language |
| Passing score | 26 out of 40 points (65%) |
| Exam fee | Set by the ISTQB Member Board or Exam Provider you book with |
| Where you sit it | Through an ISTQB Member Board or Exam Provider, which sets dates and delivery options |
| Certification valid for | Life |
What is on the exam
The syllabus has six examinable chapters, and ISTQB's exam structure tables fix how many of the 40 questions come from each. Questions are set at three cognitive levels: K1 (remember), K2 (understand) and K3 (apply). Across the exam there are 8 K1, 24 K2 and 8 K3 questions, and all the K3 questions sit in chapters 4 and 5. Every keyword listed under a chapter heading can be asked at K1, and ISTQB expects you to know its Glossary terms.
Fundamentals of testing (8 questions). What testing is and why it is needed, testing against debugging, root cause, error, defect and failure, and the seven testing principles. It also covers test activities and testware, test roles, the essential skills of a tester, the whole team approach and independence of testing.
Testing throughout the software development lifecycle (6 questions). How the lifecycle shapes testing, test-first approaches such as TDD, ATDD and BDD, DevOps, the shift-left approach and retrospectives. Then test levels and test types, confirmation against regression testing, and maintenance testing.
Static testing (4 questions). Static testing against dynamic testing, the value of early feedback, the review process, the responsibilities of the main review roles, and the commonly used review types: informal review, walkthrough, technical review and inspection.
Test analysis and design (11 questions). The heaviest chapter and the one with most of the K3 questions. Black-box techniques: equivalence partitioning, 2-value and 3-value boundary value analysis, decision table testing and state transition testing. White-box: statement and branch testing and coverage. Experience-based: error guessing, exploratory testing and checklist-based testing. And the collaboration-based approaches: collaborative user story writing, acceptance criteria and ATDD.
Managing the test activities (9 questions). Test planning, entry and exit criteria, the four estimation techniques (ratios, extrapolation, Wideband Delphi and three-point estimation), test case prioritisation, the test pyramid and testing quadrants. Then risk: project against product risk, risk analysis and control. It closes with monitoring, control and completion, configuration management and defect reports.
Test tools (2 questions). The kinds of tool that support testing and the benefits and risks of test automation.
Why people fail it
The first reason is the K3 questions. Eight questions ask you to apply what you know, for example to work out the partitions, find the boundary values, read a decision table or a state diagram, calculate an estimate or prioritise test cases. They take longer and they cannot be answered from memory. Candidates who read the syllabus without working examples run short of time and points here.
The second is precise wording. ISTQB answers follow the syllabus and Glossary, not general usage. Error, defect and failure mean different things, and so do confirmation and regression testing, or a walkthrough and an inspection. Options that sound right in everyday testing language are often the wrong ones.
The third is studying old material. Version 4.0 was rewritten from scratch, so books and question sets built on CTFL 3.1 miss topics such as the whole team approach, DevOps, the test pyramid and the collaboration-based techniques.
Finally, there is no partial credit. Where a question asks for two answers, you score only if both are correct, and you need 26 of 40 points to pass.
A study plan that fits the exam
This six week plan follows the question counts. Before week 1, try the free CTFL v4.0 practice questions to find your starting point, and download the v4.0.1 syllabus and the Glossary from ISTQB.
- Week 1, fundamentals: chapter 1 in full, with the seven principles, the error, defect and failure chain, test activities, testware and roles. Learn the chapter keywords.
- Week 2, lifecycle and static testing: chapters 2 and 3. Test-first approaches, DevOps, shift left, test levels and types, maintenance testing, and the review process and review types.
- Week 3, black-box techniques: equivalence partitioning, both forms of boundary value analysis, decision tables and state transitions. Work many examples by hand, since each of these four techniques is a K3 learning objective.
- Week 4, the rest of chapter 4: statement and branch coverage, the experience-based techniques, user stories, acceptance criteria and ATDD.
- Week 5, test management and tools: chapters 5 and 6. Planning, the estimation techniques with worked calculations, prioritisation, the pyramid and quadrants, risk, monitoring, defect reports and test automation.
- Week 6, timed runs: work through ISTQB's four free official sample exams, A to D, in 60 minutes each and review every miss against the syllabus. Then sit sets from the CertStash CTFL pack, which has 278 questions with explanations.
On exam day
ISTQB writes the syllabus and the exam rules, but Member Boards and Exam Providers run the exams. Your provider sets the date, the delivery option, the fee and the booking rules, and gives you your result, so read their candidate instructions before the day.
You have 60 minutes for 40 questions. If the exam is not in your first language, you are entitled to apply for 25% more time, which makes 75 minutes. Ask your provider how to apply. ISTQB's exam rules expect you to allocate about 1 minute to a K1 question, 1 to 2 minutes to a K2 and 3 minutes to a K3. A good approach is to clear the short K1 and K2 questions first and come back to the calculation questions with the time you have saved.
Frequently asked questions
Can I retake the CTFL if I fail?
Yes. ISTQB says you can take the exam as many times as you need to pass. The retake fee and any minimum gap between attempts are set by your Member Board or Exam Provider, so check with them.
Does the CTFL expire?
No. ISTQB Foundation Level certificates are valid for life. An older CTFL certificate also stays valid, but CTFL v4.0 is only awarded by passing the v4.0 exam.
Do I need to take a course first?
No. Accredited training is strongly recommended, and ISTQB describes it as a 3-day course, but self-study with the syllabus, the Glossary and the official sample exams is an accepted route.
Is the practice pack enough on its own?
No. It is practice, not a course. The 278 questions show you how the exam words its questions and where your gaps are, but the syllabus defines what is examinable and the answers depend on its exact wording. Use the pack alongside the syllabus and the official sample exams.
When you are ready to practise at full length, get the complete ISTQB CTFL v4.0 practice pack.
Sources
The official pages the facts in this guide were checked against.
- istqb.org/certifications/certified-tester-foundation-level-ctfl-v4-0/
- istqb.org/help/ctfl-v40/
- istqb.org/help/exam/
- istqb.org/wp-content/uploads/2024/11/ISTQB_CTFL_Syllabus_v4.0.1.pdf
- istqb.org/wp-content/uploads/2024/11/ISTQB_CTFL_Release-Notes_v4.0_CHzRtzh.pdf
- istqb.org/wp-content/uploads/2026/08/ISTQB_Exam-Structure-Tables_v1.19.pdf
- istqb.org/?sdm_process_download=1&download_id=3829
- istqb.org/help/certifications-2/
What people say about this pack
Cert Stash CTFL Foundation v4.0 practice questions were simple but accurate. They kept me on track and improved my understanding before the test.