ISTQB Foundation (CTFL) in 2027: the syllabus 4.0.1 explained

The ISTQB Foundation (CTFL) syllabus has six chapters and 1,135 minutes of training, a minimum of 18 h 55 for an accredited course (ISTQB syllabus v4.0.1). This article details each chapter, its weight in the exam, the expected knowledge levels and what version 4.0.1 really changed. If you are comparing course prices instead, read our ISTQB Foundation training 2027 price comparison.

What is the CTFL 4.0.1 syllabus?

The CTFL 4.0.1 syllabus is the official ISTQB document that defines the Foundation programme: what you must know, at which level, and how much time an accredited course must spend on it. Exam questions are derived from its learning objectives. Chapters 1 to 6 are all examinable; the introduction and appendices are not, and the standards it cites (ISO, IEEE) need not be learned beyond what the syllabus summarizes (section 0.6).

Version 4.0 was released on 21 April 2023 and replaced 3.1 from 2019. Version 4.0.1, dated 15 September 2024, is an errata: it corrects and clarifies without changing the structure or the question distribution. As of 11 November 2026, it is the latest version we found on istqb.org. The official exam tables (v1.18, 27 May 2026) still refer to "CTFL v4.0".

What are the 6 chapters of the CTFL syllabus?

The table below shows the minimum training time per chapter (syllabus, section 0.11). The split of the 40 exam questions by chapter is detailed on our ISTQB CTFL certification page.

Two chapters alone account for 725 of the 1,135 minutes, nearly two thirds of the syllabus: test analysis and design (390 min) and managing the test activities (335 min). By contrast, chapter 6 on tools needs only 20 minutes. Efficient preparation follows these proportions rather than the page order.

What do K1, K2 and K3 mean?

Every learning objective has a knowledge level. K1 means remember: recognize a term or a definition. K2 means understand: explain, compare, classify. K3 means apply: work through a technique on a concrete case. Every keyword listed at the top of a chapter must be known at K1 level, even when no objective mentions it (syllabus, section 0.5).

The exam has 8 K1 questions, 24 K2 questions and 8 K3 questions. The ISTQB tables allow about 1 minute per K1 or K2 question and 3 minutes per K3 question. Syllabus 4.0.1 has six K3 objectives:

These six objectives need practice on paper, not just reading. That is where the 3 minutes per question are spent, and often where the exam is won.

What did version 4.0.1 change?

Appendix C of the syllabus ("Release Notes") lists the changes in 4.0.1 compared with 4.0. There are many, but they are small:

• Six objectives reworded to match the ISTQB glossary, for example FL-2.1.5 "Explain the shift-left approach" becomes "Explain shift left", and FL-1.4.1 moves from "summarize" to "explain" the test activities.
• Vocabulary aligned with the glossary: "work products" instead of "artifacts", "testware" instead of "test documentation", "risk level", "test progress reports" and "test completion reports", and so on.
• ISO 25010 (2023): the syllabus keeps the original names of the quality characteristics but adds the new names "interaction capability" (formerly usability) and "flexibility" (formerly portability) in section 2.2.2.
• Three keywords added: test process and traceability (chapter 1), test strategy (chapter 5). They are therefore examinable at K1 level.
• Content corrections: invalid partitions should be tested in isolation to avoid defect masking (4.2.1); the model is now called a "state diagram" (4.2.4); the relation between test pyramid layers and test isolation is corrected (the higher the layer, the lower the isolation, 5.1.6).

If you are revising with material written for 4.0, it remains valid. Just add the three new keywords and remember the rule on invalid partitions, which can turn up in a question.

Why take the CTFL certification in 2027?

According to the syllabus, the Foundation is aimed at anyone involved in testing: testers, test analysts and test engineers, but also developers, project managers, product owners, business analysts and quality managers (section 0.2). It gives the team a shared vocabulary and leads to the Advanced Level (Test Analyst, Technical Test Analyst, Test Manager) and to Specialist modules such as test automation or AI testing (section 0.3). The 14 "business outcomes" listed by ISTQB describe what a certified tester can do: write clear defect reports, work in a cross-functional team, understand how risk affects testing, and more.

If you plan to test generative AI next, read our ISTQB CT-GenAI certification guide. To pass the exam itself, we have gathered the classic traps in How to pass the ISTQB CTFL exam in 2027.

How should you prepare for the CTFL syllabus?

Start by reading the official syllabus once, end to end, without trying to memorize everything. Then work chapter by chapter according to the question weights: chapters 4 and 5 deserve nearly two thirds of your time. Do the K3 exercises by hand, then timed mock exams, and review every mistake. Our free ISTQB mock exam follows the official 40-question format.