A telc B2 mock exam has to do two things: reproduce the real format under real time, and then tell you whether you would have passed. An answer sheet does the first. It cannot do the second. For Lesen, Sprachbausteine and Hören you can count your own score. For Schreiben and Sprechen you need someone who marks against the official criteria, and those are exactly the parts where people fail.
By Ela Zakrzewska, telc B2 examiner for over 20 years. Hundreds of letters marked against the official criteria.
Almost every candidate who fails with me has done mock exams beforehand. Some five, some fifteen. The number was never the problem.
The problem is always the same one: do the test, check the answer key, tick it off. That works for Lesen and Hören, where there is a right answer. For Schreiben there is no key to check against. For Sprechen there isn't even a conversation partner.
So candidates spend months practising the two parts they can already handle, and leave the two that decide the result untouched. A mock exam nobody marks measures your stamina, not your result.
What a mock exam actually has to deliver
If any one of these three is missing, your dry run measures nothing.
One: the real format under real time. Lesen and Sprachbausteine run together for 90 minutes, Hören takes about 20, Schreiben 30. And there is no break between them. If you practise at home and fetch a coffee in the middle, you are not simulating the exam. You are simulating a kinder version of it.
Two: a verdict against the official criteria. Not "that was decent". Which criterion sits at which grade, and what that means in points.
Three: separate results for the written and the oral exam. Because telc B2 is passed separately. A single overall figure is a misleading number in this exam, and I will come back to why.
An answer sheet delivers the first. It stops at the second, and it cannot do the third at all.
How is the telc B2 exam structured?
The exam has 300 points across five parts:
| Part | Time | Points |
| Leseverstehen (3 Teile) | 90 minutes, combined with Sprachbausteine | 75 |
| Sprachbausteine (2 Teile) | (see above) | 30 |
| Hörverstehen (3 Teile) | approx. 20 minutes | 75 |
| Schriftlicher Ausdruck | 30 minutes | 45 |
| Mündlicher Ausdruck (3 Teile) | approx. 15 minutes, plus 20 minutes preparation | 75 |
| Total | 300 |
Candidates trip over the same three things in that table.
Every listening text is played once. In all three parts, including the second and the third. Other exams do this differently, and the confusion costs real points, because candidates wait for a second hearing that never comes.
In Schreiben you choose between two tasks. You get two prompts and write one of them: a semi-formal e-mail of at least 150 words. That choice is itself a decision under time pressure, and it belongs in your dry run.
Dictionaries are banned, including during the 20 minutes of preparation for the oral exam. Practise with one and you are practising under the wrong conditions.
Why you cannot mark your own Schreiben
Your letter is assessed against three criteria. Each gets A, B, C or D. A is worth 5 points, B is 3, C is 1, D is 0. The total is multiplied by 3. Maximum 45 points.
- Kriterium I, Behandlung des Schreibanlasses (on the marking sheet, shortened to Aufgabenbewältigung). Did you hit the right Textsorte and register, and did you cover at least three Leitpunkte?
- Kriterium II, Kommunikative Gestaltung. Structure, linking of sentences, range of language, consistency of register.
- Kriterium III, Formale Richtigkeit. Grammar, spelling, syntax.
And then the Bewertungskriterien contain this sentence:
"Wenn für Kriterium I und/oder Kriterium III ‚D' vergeben wurde, wird der gesamte Text mit 0 Punkten bewertet."
If Kriterium I and/or Kriterium III is graded D, the entire text is scored 0 points.
Kriterium II on its own does not trigger it. That is the zero-point rule, and it is why candidates with good German fail.
There is a second, harsher route to zero. If your text does not address the task set, it counts as "Thema verfehlt", topic missed. Then all three criteria are marked D at once.
Why self-assessment lands one grade too high
You can read these criteria. You can memorise them. You still cannot apply them to your own text.
The reason is not laziness, it is psychology: you know what you meant to say, so you read it into your own text. An examiner reads only what is on the page. That is why self-assessment runs systematically high, usually by exactly one grade.
And the grades sit close together. D on Kriterium III does not mean "a lot of mistakes". It means so many mistakes that your communicative intention no longer arrives. C is "Fehler, die mehrmaliges Lesen erforderlich machen", errors that force the reader to go back. B is "wenige Fehler", few errors that do not endanger the message on a single reading. Your pass sits between B and D, and that is not a distinction you can draw reliably on your own writing.
The four mistakes that trigger the zero-point rule in practice: why so many telc B2 letters score zero.
What does "passing" telc B2 actually mean?
Not 60 percent of 300. That is the most expensive arithmetic mistake in the whole preparation.
You need 60 percent in each of the two parts separately:
- Written exam: at least 135 of 225 points
- Oral exam: at least 45 of 75 points
The two do not offset each other. A strong oral exam does not rescue a weak written one. Score 130 written and 70 oral and you have 200 of 300 points and you have still failed.
A mock exam that hands you one overall percentage is therefore answering the wrong question. You need two numbers.
The oral exam you cannot practise alone
The oral exam takes about 15 minutes, has three parts of roughly five minutes each, and is a Paarprüfung, taken in pairs. In Teil 1 you choose from seven topics.
It is assessed against four criteria, applied separately in each of the three parts:
- Ausdrucksfähigkeit, range of expression (max. 7 points)
- Aufgabenbewältigung, task completion (max. 7 points)
- Formale Richtigkeit, formal accuracy (max. 7 points)
- Aussprache und Intonation, pronunciation (max. 4 points)
That is 25 points per part, 75 in total.
Look closely at the fourth line. Pronunciation is the lowest-weighted criterion in the entire oral exam: 4 points against 7. Across the whole exam that is about 4 percent. Candidates with a noticeable accent routinely spend weeks on pronunciation drills while their Aufgabenbewältigung goes unpractised, and that one carries almost twice the weight.
Accent is also not where the difficulty sits. Two of the three parts are interaction, and you get a partner you did not choose. He can go silent or he can talk over you, and both cost you points if you only prepared for yourself. Practising alone rehearses your own turns and nothing else.
What to do when your partner is weak: what happens if your partner is weaker than you.
The mock exam in the Knaxx app
Knaxx was built for exactly this gap. The app takes you through the complete exam, all five parts, timed and without a break, about three hours, the way the real exam day runs. Afterwards you do not get "well done". You get a result for each part and an assessment of your Schreiben against the three criteria: which criterion sits at which grade, where a zero-point trigger is buried in your text, and what you can still change in the time you have left.
For the oral exam there is an AI conversation partner. The free tier lets you try it four times. The four behaviour profiles, from the silent partner to the domineering one, come with Premium access. Either way you practise the interaction that is assessed in two parts out of three.
And you can repeat it. Mock exams are unlimited on the free tier, seven of them a week with AI marking. A printed workbook cannot do that: once you have been through it, you know the answers and you are only measuring your memory.
It was built by an examiner who spent twenty years on the other side of the table, together with an AI specialist who makes that marking logic scale.
Your first exam is free, with no credit card and no account: take your first exam free.
The four-week plan with three run-throughs
Three run-throughs in four weeks, each with a different job.
Week 1, the diagnostic run. The complete written exam in one sitting, no break, on the clock. Result: you know which part carries you and which one tips you over. It is almost always Schreiben, and it almost always comes as a surprise.
Week 2, target the weakest part. No full tests. Only the area that came in under 60 percent in week 1.
Week 3, the writing run. Three letters under a real 30 minutes, each one marked separately against the three criteria. Control question every time: would a D have appeared anywhere here?
Week 4, the full simulation. Complete again, no break again, on the clock again. The comparison against week 1 is your actual measure of progress.
Speaking runs alongside from week 1, two or three times a week. It is the part candidates postpone longest, and the only one where postponing cannot be made up later.
What you can do right now
- Today: One complete written run-through, no break, on the clock. This is a measurement, not a training session.
- Then: Work out two results, not one. 135 of 225 and 45 of 75.
- On the writing part: Award the three criteria separately and check honestly whether a D appears anywhere. If you are unsure, that uncertainty is precisely the point where you need someone else's assessment.
- For the oral exam: Start this week, not in the week of the exam.
- Access: take your first exam free, no credit card, no account.
Crack the writing part in the dry run, before it cracks you on exam day.
FAQ: telc B2 mock exam
Is a PDF mock exam enough to prepare?
For Lesen, Sprachbausteine and Hören, yes, because there is a right answer to check against. For Schreiben and Sprechen, no. An answer sheet cannot give you an assessment against the three criteria, and that assessment is what decides whether you pass.
How many mock exams should I do?
Three properly marked ones beat ten clicked through quickly. The first shows you where you stand, the second trains your weakest part, the third measures progress under real conditions.
How many points do I need to pass telc B2?
60 percent in each part separately: 135 of 225 points written and 45 of 75 oral. The parts do not offset each other. A strong oral exam does not compensate for a weak written one.
How do I assess my own writing?
Against the three official criteria, each with A, B, C or D, then multiply the total by 3. The zero-point rule matters most: if Kriterium I or Kriterium III gets a D, the whole text scores zero. When marking yourself, drop one grade and you will usually land closer to an examiner's verdict.
Can I practise the oral exam alone?
You can speak Teil 1 alone and record it. Teil 2 and Teil 3 are interaction with a partner you do not choose in the real exam. Without someone opposite you, you are missing the part that costs the most points.
Are old mock exams from the internet usable?
Only with care. Material from before 2019 describes a different exam format: different names for the oral parts, different timings, and five topics instead of seven. Still usable for Lesen and Hören, not for oral preparation.
About the authors
Ela Zakrzewska has taught telc B2 for over twenty years and has marked hundreds of letters against the official telc criteria. She was born in Lithuania and has lived and worked in Poland, Germany, Belgium and the UK. Those five countries, five languages and the networks she has built worldwide shape the Knaxx approach: exam knowledge that accounts for every first language, and a strategy that works for immigrants in Germany because she is one.
Tu-San Pham holds a PhD in AI and data science and is co-founder of Knaxx. She translates Ela's two decades of exam expertise into systems that reach hundreds of learners at once without losing the marking logic. She and Ela met as exam partners in a language exam. Now they are building the exam partner they both wish they'd had.
