IELTS Writing is the section that causes the most frustration for test-takers — and for good reason. Unlike Listening and Reading, where the answers are either right or wrong, Writing is assessed by a human examiner against four criteria: Task Achievement, Coherence and Cohesion, Lexical Resource, and Grammatical Range and Accuracy.
That complexity is also an opportunity. Because Writing is skills-based, the mistakes that cost people marks are mostly predictable — and fixable. Here are the five most common ones, and what to do about them.
1. Not Answering the Task Properly
This is the single biggest mistake in both Task 1 and Task 2 — and it costs more marks than almost any grammatical error. In Task 2, "not answering the task" doesn't just mean going off-topic. It means answering only part of the question, giving a vague position, or addressing a related but slightly different argument.
The fix: Before you write a single word, spend 2–3 minutes reading the question carefully. Write your thesis statement first — a clear, direct answer to the question — and make sure every paragraph supports it.
2. Over-Using Complex Sentences (and Getting Them Wrong)
Many candidates believe that longer, more complex sentences will impress the examiner. The result is often the opposite: sentences that are difficult to follow, full of grammatical errors, and structurally broken. IELTS examiners don't reward complexity for its own sake. They reward accuracy and range.
The fix: Aim for a natural mix of sentence lengths and structures. A clear, accurate B2-level sentence is always better than a broken attempt at C1.
3. Weak Paragraph Structure
Coherence and Cohesion accounts for 25% of your Writing score. One of the most common ways candidates lose marks here is through poorly organised paragraphs — ideas that aren't clearly connected, points that appear without development, or paragraphs that contain multiple unrelated ideas.
The fix: Use a clear paragraph structure for every body paragraph: topic sentence, explanation, example, link. This TEEL structure creates the logical flow that examiners are looking for.
4. Repeating the Same Vocabulary
Lexical Resource — your vocabulary range — is another 25% of your score. Candidates who repeat the same words and phrases throughout their essay consistently score lower than they should.
The fix: Build a bank of synonyms and paraphrases for common IELTS topics. In the exam, consciously vary the language you use — don't repeat key words more than once or twice.
5. Spending Too Long on Task 1 and Rushing Task 2
Task 2 carries twice the marks of Task 1. Yet many candidates divide their time almost equally — or spend more time on Task 1 because it feels more manageable. Rushing Task 2 leads to underdeveloped arguments, weaker vocabulary, and avoidable grammatical errors.
The fix: Aim for approximately 20 minutes on Task 1 and 40 minutes on Task 2. Practise this timing until it becomes automatic.
Turning Knowledge into Marks
Knowing these mistakes is a start. Fixing them requires practice, feedback, and a structured approach — and that's exactly what our IELTS Preparation course is designed to provide. Over 12 weeks, in small live classes with CELTA and DELTA-qualified teachers, you'll develop the skills that translate directly into a higher band score.
