IELTS Study Tips

The 5 Biggest IELTS Mistakes — and How to Avoid Them

These are the mistakes that cost students the most marks — not because they are difficult to fix, but because most students don’t realise they are making them.

Why this matters: Many students plateau at Band 5.5 or 6 not because their English is weak, but because they are making the same structural and strategic mistakes repeatedly. Fixing these five issues alone can move your score by a full band.

Mistake 01
Task Achievement

Not Reading the Question Carefully

This is the single most common — and most damaging — mistake IELTS candidates make. Students read the question quickly, assume they understand it, and then write a perfectly good essay about the wrong thing.

The problem

Many candidates misread key words. For example, a question asking ‘Do the advantages outweigh the disadvantages?’ is not the same as ‘Discuss the advantages and disadvantages.’ One requires a clear position on which side is greater. The other simply requires a balanced discussion. Getting this wrong means your entire essay misses the point — no matter how well it is written.

Another trap

Some questions have two parts that must both be answered. For example: ‘What are the causes of this? What solutions would you suggest?’ Many students answer only one part and lose marks heavily under Task Achievement.

How to avoid it

Before you write a single word, underline the key task words in the question. Ask yourself: What type of essay is this? How many questions am I being asked? What is my position? Spend two minutes planning. It will save you far more time than it costs.

Key takeaway

Spend at least 2 minutes reading and underlining the question before you start writing. Never assume — always confirm what is being asked.

Mistake 02
Task Achievement

Writing Too Little — or Ignoring the Word Count

Task 2 requires a minimum of 250 words. Task 1 requires 150 words. Writing below the minimum automatically lowers your Task Achievement score. But many students also make the opposite mistake — padding their essay with repeated or irrelevant content just to reach the word count.

The problem

Writing under 250 words in Task 2 will cap your Task Achievement score regardless of the quality of your ideas. Examiners are instructed to penalise responses that are significantly under the word limit. On the other hand, writing 450 words of repetitive content does not earn extra marks — it simply wastes time and may introduce more errors.

How to avoid it

Aim for 260–300 words for Task 2 and 170–190 words for Task 1. This gives you a comfortable buffer without over-writing. Practise writing to length regularly so that you develop a natural sense of how much you have written without constantly counting words during the exam.

Key takeaway

Quality over quantity. Aim for 270–290 words in Task 2. Every sentence should serve a purpose — develop an idea, give an example, or link back to your argument.

Mistake 03
Coherence and Cohesion

Using Linking Words Incorrectly

Linking words are one of the most misused features of IELTS writing. Students learn a list of connectors and then use them as often as possible — regardless of whether they are grammatically correct or logically appropriate. This actually harms, rather than helps, the Coherence and Cohesion score.

Common errors

‘Moreover’ is used to add a similar or stronger point — not to introduce a contrast. ‘However’ must be followed by a comma when it starts a sentence. ‘Despite’ must be followed by a noun or gerund, never a clause. ‘Therefore’ shows a result — it cannot introduce a brand new idea. Examiners notice these errors immediately.

The bigger mistake

Over-using linking words makes writing feel mechanical. Beginning every sentence with ‘Furthermore,’ ‘Moreover,’ or ‘In addition,’ signals that the student is trying to impress rather than communicate. A well-structured paragraph with one or two accurate linking words scores higher than a paragraph crammed with connectors used incorrectly.

How to avoid it

Learn the exact function and grammar of each linking word — not just its meaning. Practise using them in sentences and have a teacher check whether they are accurate. Use them sparingly and purposefully.

Key takeaway

Learn what each linking word actually does before using it. ‘Moreover’ adds. ‘However’ contrasts. ‘Therefore’ shows a result. Using the wrong one in the wrong place costs marks.

Mistake 04
Task Achievement

Having a Vague or Unclear Position

In Task 2, your position — your opinion — must be clear from the introduction and consistent throughout the essay. Many students try to ‘sit on the fence’ to avoid committing to a view. This feels safe, but it is actually one of the most penalised weaknesses in IELTS writing.

The problem

An introduction that says ‘There are advantages and disadvantages to this issue’ without stating which side you believe is greater, or an essay that agrees in one paragraph and disagrees in the next without clear signposting, will score poorly for Task Achievement. Examiners need to be able to identify your position at a glance.

Partial agreement is fine

You do not have to completely agree or disagree. Saying ‘While I acknowledge that X has merit, I believe Y is ultimately more significant because…’ is a perfectly valid and sophisticated position — as long as it is stated clearly and maintained consistently.

How to avoid it

State your position in the introduction. Repeat or reinforce it in the conclusion. Make sure both body paragraphs support your argument — even if one acknowledges the other side, it should always lead back to your main position.

Key takeaway

Your position should be clear enough that a reader can identify it after reading only your introduction and conclusion. If it is not obvious — rewrite.

Mistake 05
All four criteria

Relying on Memorised Phrases and Templates

Many students prepare for IELTS by memorising essay templates, opening phrases, and vocabulary lists — then reproducing them in the exam regardless of the question. Examiners are specifically trained to identify memorised content, and it is penalised across all four assessment criteria.

The problem

Phrases like ‘In this day and age,’ ‘Every coin has two sides,’ ‘It goes without saying that,’ and ‘In this essay, I will discuss both sides and give my own opinion’ are so commonly used that they are immediately recognisable as memorised filler. They add no meaning, demonstrate no genuine language ability, and signal to the examiner that the student is not engaging with the question.

Vocabulary lists

Similarly, inserting advanced vocabulary that does not fit naturally into the sentence — simply to appear sophisticated — often produces grammatically awkward or logically incorrect sentences. Using ‘plethora’ or ‘myriad’ incorrectly is worse than using ‘many’ correctly.

How to avoid it

Build genuine language skills rather than shortcuts. Learn vocabulary in context — understand how and when words are used, not just what they mean. Practise responding to a wide range of questions so that your writing is always a genuine response to the specific task in front of you.

Key takeaway

The examiner has read thousands of essays. They will recognise a template immediately. The best essays feel like genuine, thoughtful responses — not rehearsed performances.

Quick checklist — before you submit any IELTS essay

✓ Have I answered the exact question asked?

✓ Is my position clear in the introduction?

✓ Have I written at least 250 words?

✓ Are my linking words used accurately?

✓ Is my position consistent throughout?

✓ Have I avoided memorised phrases?

Want more? Book our IELTS Preparation Course — one-to-one or group sessions available.

Enrol Now

The 5 Biggest IELTS Mistakes and How to Avoid Them

The 5 Biggest IELTS Mistakes — and How to Avoid Them

Asma