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7 Mistakes Native English Speakers Make on the IELTS Exam (And How to Avoid Them)

  • Writer: Maxine
    Maxine
  • 5 days ago
  • 5 min read

By Maxine, Founder of LinguaElite | Updated March 2026


Here is a stat that surprises almost everyone I share it with: native English speakers average just 6.9 on IELTS Academic. Writing scores drop even further, to 6.3. Meanwhile, German speakers average 7.4, and Polish speakers hit 7.0. Native English speakers are being outperformed by people who learned English as a second language.


This is not because native speakers are bad at English. It is because IELTS is not testing English. It is testing a very specific set of exam skills, and native speakers walk in without them. I have taken the IELTS exam myself, and I have coached students through it. The mistakes I see from native speakers are remarkably consistent. Here are the seven most common ones.


1. Assuming Fluency Equals a High Score

This is the root of every other mistake on this list. Native speakers assume that because they speak, read, and write English every day, they will naturally score an 8 or 9 without preparation. IDP, one of the organisations that co-owns IELTS, puts it bluntly: native speakers have "unique preparation needs, quite different from those with English as a second language," and many score lower than expected because they underestimate what the test requires.


IELTS is not a fluency test. It is a performance test with specific scoring criteria. You are marked on task response, coherence, lexical resource, and grammatical range in Writing, and on fluency, lexical resource, grammar, and pronunciation in Speaking. Each criterion has detailed descriptors that examiners are trained to apply. If you do not know what those criteria are, you cannot optimise your performance against them. It is like sitting an exam without reading the syllabus.


2. Ignoring the Writing Task 1 Format Entirely

Writing Task 1 (Academic) asks you to describe data from a chart, graph, table, or diagram. It is a format that most native speakers have never encountered in their lives. There is no introduction-body-conclusion structure here. Instead, you need an overview paragraph (identifying 2 to 3 key trends), followed by body paragraphs with specific data points and comparisons. No conclusion. If you add a conclusion, it can actually count against you because it suggests you do not understand the task.


The overview paragraph is the single most important element. Without it, your Task Achievement score cannot rise above Band 5, regardless of how good your English is. Most native speakers skip it entirely because they do not know it is required. This one gap often accounts for an entire band's difference in the Writing score.


3. Writing a "Good Essay" Instead of an "IELTS Essay" in Task 2

Task 2 asks you to write an essay in response to a statement or question. Native speakers tend to write well but score poorly because they do not answer the question in the way IELTS requires. There are five distinct essay types (agree/disagree, discuss both views, advantages/disadvantages, problem/solution, and two-part questions), and each has a specific structural requirement.


The most common error: treating every prompt as a general discussion. If the prompt says "To what extent do you agree or disagree?" the examiner expects a clear position stated in the introduction and maintained throughout the essay. If you hedge and present both sides equally without committing to a view, your Task Response score drops. Native speakers often lose marks here not because they write badly, but because they write the wrong type of essay for the prompt they have been given.


4. Overthinking True/False/Not Given in Reading

This question type causes more frustration for native speakers than any other. The logic seems simple: True means the text says it, False means the text contradicts it, and Not Given means the text does not address it. But native speakers are trained to read between the lines, to infer meaning, and to use context clues. IELTS demands the opposite. It wants literal, text-based answers.


"Not Given" does not mean "probably false" or "I could not find it." It means the text is completely silent on the claim. If you are making logical deductions or drawing on your own knowledge, you are doing it wrong. This is a skill that feels unnatural to fluent readers, and it requires deliberate practice to override your instincts.


Woman in a blue shirt looks tired, resting her head on her hand at a desk with papers. Blurred office setting, neutral colors.

5. Running Out of Time on Reading

Native speakers tend to be confident readers. That confidence often leads to a slow, thorough reading style: reading the entire passage carefully before looking at the questions. In IELTS, this approach runs you out of time. You have 60 minutes for three passages and 40 questions, and the passages increase in difficulty. Many native speakers finish two passages comfortably and then have to rush or guess through the third.


Effective IELTS reading is strategic: skim for structure first (2 to 3 minutes per passage), then scan for specific answers to each question. The goal is not to understand every word. It is to locate the information that answers the question. This is a fundamentally different skill from how most people naturally read, and it requires practice to develop.


6. Speaking Too Casually in Part 3

The Speaking test has three parts, and they require different registers. Part 1 is conversational: where are you from, what do you do. Part 2 is a prepared monologue on a given topic. Part 3 is where native speakers lose marks, because it asks abstract, analytical questions, and the examiner expects a shift from casual conversation to structured, nuanced discussion.


If Part 2 was about a trip you took, Part 3 might ask: "Why do you think international tourism is important for developing countries?" A casual answer ("Yeah, tourism brings money in and that is good for everyone") scores differently from an analytical one ("Tourism can play a significant role in economic development, particularly in areas that lack industrial infrastructure, though there is often a tension between economic benefit and cultural preservation that communities have to navigate"). The difference is not vocabulary. It is register, structure, and depth of reasoning. Most native speakers do not know that this shift is expected, so they stay in casual mode throughout.


7. Not Practising Under Timed Conditions

Perhaps the most damaging mistake of all: native speakers do not practise. They glance at a sample test, decide it looks manageable, and walk into the exam cold. The result is predictable. Writing under a 60-minute deadline is a different skill from writing with unlimited time. Reading three academic passages in 60 minutes is different from reading at your own pace. Listening to a 30-minute audio track with no replay and no pause is different from everyday listening.


The test rewards preparation. Not English preparation, but test preparation. Knowing the format, understanding the scoring criteria, practising under real time pressure, and learning from expert feedback on your specific weak areas. This is where most native speakers leave marks on the table, and it is also where the right guidance can make the biggest difference.


The Bottom Line

IELTS is a skills test disguised as an English test. Native speakers have the language. What they lack is the exam strategy, the format awareness, and the criteria-level precision that turns fluency into a high band score. These are learnable skills, but they are not skills most people develop on their own.


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