Most IELTS candidates don't lose marks because their English is weak; they lose marks for small, repeated mistakes that examiners are specifically trained to catch. The global average IELTS Writing band sits around 5.9, and a large share of that gap comes down to fixable errors: an unclear position on the question, weak paragraph structure, repeated vocabulary, a wrong tense here and there.
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IELTS Writing is marked against four equally weighted criteria: Task Achievement/Response, Coherence and Cohesion, Lexical Resource, and Grammatical Range and Accuracy, so a genuine improvement plan has to cover all four, not just grammar.
Common Mistakes in IELTS Writing
Below is a breakdown of the most common mistakes in IELTS Writing for each of the areas, with examples and quick fixes.
1. Task Achievement / Task Response Mistakes
This is where many candidates lose the most marks, often without realizing it because the essay might be grammatically clean but still miss what the question actually asked.
Common Mistakes
- Not answering every part of the question. Task 2 questions are often two-part ("Discuss both views and give your opinion," "What are the causes and solutions?"). Answering only one part caps your score regardless of how well the rest is written.
- Sitting on the fence. Writing "some people think X, others think Y" without ever stating your own view turns an opinion essay into a description of other opinions.
- Writing under the word count. Task 1 needs at least 150 words, Task 2 at least 250. Falling short costs marks directly.
- Task 1: describing every single data point. Task 1 rewards identifying and reporting the key trends and an overview, not a data dump of every number on the chart.
- Relying on a memorized template. Examiners are trained to spot generic opening lines like "This essay will discuss both sides and give an opinion at the end." These read as mechanical and can be excluded from scoring.
Examples:
❌ "This essay will discuss both sides and give an opinion at the end."
✅ "Although online learning offers flexibility, I believe traditional classroom interaction remains more valuable because..."
Tip: Before you write a single sentence, underline every part of the question. If it asks for causes and solutions, or asks you to discuss both views and give your opinion, your essay needs a paragraph for each part no exceptions.
2. Coherence and Cohesion Mistakes
This criterion measures how logically your ideas flow and how clearly one sentence connects to the next, separate from vocabulary or grammar.
Common Mistakes
- Overusing linking words. Starting every paragraph with "Firstly," "Secondly," "Moreover," "Furthermore" makes writing sound like a checklist rather than a natural argument.
- One idea per paragraph, but no internal structure. A paragraph needs a clear topic sentence, supporting explanation, and an example, not three unrelated sentences stacked together.
- Unclear pronoun reference. Using "which," "it," or "this" without a clear noun to point back to forces the examiner to guess your meaning.
- Repeating the same linking word instead of varying it. Using "Also" in every paragraph where "Furthermore," "In addition," or "Similarly" would flow better.
Examples:
❌ The report was excellent, which impressed the teacher. (Ambiguous: what impressed the teacher, the report or being excellent?)
✅ The report was excellent and impressed the teacher.
Tip: Use linking words to connect ideas, not to open every sentence. One well-placed "however" or "as a result" per paragraph is usually enough; let the logic of your argument do the rest of the connecting.
3. Lexical Resource Mistakes
This is about vocabulary range and accuracy, not how advanced your words sound, but how precisely and naturally you use them.
Common Mistakes
- Repeating the same word. Using "increase" five times in a Task 1 report when "rose," "climbed," "grew," and "went up" are all available.
- Copying phrases directly from the question. Paraphrasing the question in your introduction shows range; repeating it word-for-word does not.
- Forcing in advanced vocabulary that doesn't fit. Using "skyrocketed" to describe a 2% rise is inaccurate, not impressive.
- Informal language. Contractions ("don't," "can't"), casual phrases ("a lot of," "stuff"), or spoken-style expressions don't fit the formal register IELTS Writing expects.
- Word form errors. Using the wrong part of speech: a noun where an adverb is needed, or vice versa.
Examples:
❌ She gave a quick respond.
✅ She gave a quick response.
❌ The teacher explained very clear.
✅ The teacher explained very clearly.
Tip: Keep a running list of 3–4 synonyms for words you use constantly (increase, important, show, people) and rotate them deliberately while writing and proofreading.
4. Grammatical Range and Accuracy Mistakes
Grammar is the fourth pillar necessary but not sufficient on its own for a high band score. These are the errors examiners flag most often.
Subject-Verb Agreement
A verb must agree with its subject in number.
❌ The results of the research shows that…
✅ The results of the research show that…
Tip: Watch for phrases between the subject and verb — "along with," "as well as," "including" — which don't change the subject's number.
Tense Consistency
❌ Last year, the government introduce new policies to reduce pollution.
✅ Last year, the government introduced new policies to reduce pollution.
Tip: In Task 1, use past tense for historical data, present tense for general/current trends, and future tense for predictions. In Task 2, use present tense for general facts or your opinion, switching only when a specific time reference requires it.
Articles (A, An, The)
- Use "a" before a consonant sound (a university), "an" before a vowel sound (an hour), "the" for something specific or already mentioned.
- Don't use an article with plural or uncountable nouns in general statements: "People enjoy sports," not "The people enjoy sports."
- If unsure, omitting the article is often safer than using the wrong one.
Prepositions
❌ She is good in mathematics.
✅ She is good at mathematics.
❌ Many students is interested in online learning.
✅ Many students are interested in online learning.
Tip: Learn prepositions as fixed chunks "interested in," "responsible for," "dependent on" rather than translating from your native language.
Countable vs. Uncountable Nouns
❌ Many informations are available online.
✅ Much information is available online.
Tip: Use "some" or "a lot of" for uncountable nouns, and "many" or "few" for countable ones.
Sentence Fragments and Run-On Sentences
❌ Because students need more practice. (fragment)
✅ Students need more practice because it helps them improve faster.
❌ Technology is growing fast it is changing education. (run-on)
✅ Technology is growing fast, and it is changing education.
Parallel Structure
❌ Students enjoy reading, to write essays, and they like playing sports.
✅ Students enjoy reading, writing essays, and playing sports.
Proofreading: Your Last Line of Defense
Even candidates who know every rule above still make errors under time pressure. Proofreading is what catches them before they cost you marks.
- Leave 3–5 minutes at the end of each task specifically for proofreading.
- Check for subject-verb agreement, articles, tense consistency, and spelling in that order, since these are the highest-frequency errors.
- Read silently but deliberately, sentence by sentence, rather than skimming the whole essay at once.
- Focus on the two or three mistakes you personally make most often, rather than trying to catch every possible error type.
Key Takeaways
- Task Achievement: Answer every part of the question, commit to a clear position, and stay within the intended structure. Don't rely on templates.
- Coherence and Cohesion: Use linking words to connect ideas, not to open every sentence; keep pronoun references clear.
- Lexical Resource: Vary your vocabulary deliberately, keep the register formal, and don't force in words that don't fit.
- Grammatical Range and Accuracy: Watch subject-verb agreement, tense consistency, articles, and prepositions, and always leave time to proofread.
A high IELTS Writing band comes from removing your recurring mistakes across all four criteria, not from adding more advanced vocabulary on top of the same errors. Master the fundamentals in each area, and the score follows.
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Whether you're applying to universities overseas, pursuing immigration, or advancing your career, MIE English Academy offers a dependable, affordable, and results-driven IELTS preparation course for students across Bangladesh with experienced instructors, hands-on practice, and a proven track record.
FAQs
What are the most common mistakes in IELTS Writing?
Across all four criteria, the most frequent are: not fully answering the question (Task Achievement), overusing or misusing linking words (Coherence and Cohesion), repeating the same vocabulary (Lexical Resource), and subject-verb agreement or tense errors (Grammar).
Is grammar the biggest factor in my IELTS Writing score?
No. Grammar is one of four equally-weighted criteria. A grammatically clean essay that doesn't fully answer the question, or that repeats the same three words throughout, will still score lower than a fuller, more varied response with occasional grammar slips.
What's the best way to check my writing before submitting?
Leave 3–5 minutes at the end of each task. Check subject-verb agreement, tenses, and article use first, since these are the highest-frequency errors. Read silently but sentence by sentence rather than skimming.
How can I improve my score if it's stuck at Band 6?
Scores often plateau at 6 because of Task Achievement or Coherence issues rather than grammar. For example, not fully answering multi-part questions or overusing linking words. Reviewing your last few essays against all four criteria (not just grammar) usually reveals the real bottleneck.