Common IELTS Writing mistakes (and how to avoid them)
The mistakes that pull bands down the hardest are almost always the same handful, and most of them have nothing to do with grammar. They're decisions made in the first five minutes of writing — before any sentence is on the page. Here are the ones to recognise in your own drafts, with a concrete fix for each.
01. Misreading the task prompt
The single biggest hit to a Task Response band. Task 2 prompts often have two parts ("Discuss both views and give your own opinion", "What are the advantages and disadvantages") and most low-scoring responses cover one part and skip the other. Examiners can't give credit for what isn't there. The Task Response descriptor is explicit: a partial response is capped at Band 5.
The 30-second fix
Before you start writing, underline every instruction word in the prompt. Circle the question type. Write a single line stating what your conclusion will be. If the prompt has two questions, your plan has to address both — write a two-word note for each before the first paragraph.
02. Weak topic sentences (or none at all)
A topic sentence is the one sentence that tells the reader what a paragraph is about. Without one, the examiner has to figure out your structure from the body of each paragraph — which lowers Coherence and Cohesion.
Most low-band paragraphs start with an example ("For instance, in my country…") or a piece of evidence. Both are fine as the second sentence; they're weak as the first. Lead with the claim, then support it.
- Weak: "For example, the government in my country recently banned plastic bags…"
- Strong: "Government regulation is the most effective way to reduce single-use plastics. For example, the recent ban in my country…"
03. Repetitive vocabulary on a keyword
If the prompt is about "technology in education", a Band 6 response uses "technology" eleven times. A Band 7 response uses "technology" three times and alternates with "digital tools", "online platforms", "ed-tech", "these resources", or a precise sub-term like "tablets". This is the most common reason candidates stall at Band 6.5 on Lexical Resource.
The fix is structural, not vocabulary: before writing, list 4–5 ways to refer to the topic noun. Use a different one each paragraph. Don't reach for thesaurus vocabulary you don't usually use — examiners will spot the lift.
Build your own list of less-common topic words from real feedback on your essays — far more useful than memorising a vocab book.
Open My Weak Words04. Run-on sentences and comma splices
A run-on sentence stitches independent clauses without proper punctuation. A comma splice does the same with just a comma. Both cost Grammatical Range and Accuracy points and obscure meaning.
- Comma splice: "Many people prefer cars, public transport is too slow."
- Fixed: "Many people prefer cars because public transport is too slow." (Subordinating conjunction)
- Also fixed: "Many people prefer cars; public transport is too slow." (Semicolon)
- Also fixed: "Many people prefer cars. Public transport is too slow." (Two sentences)
If you find yourself writing a sentence longer than about 25 words, look for the first natural break and ask whether it should be two sentences or use a semicolon. Variety in sentence length is itself a Band 7 signal — you don't need every sentence to be complex.
05. Off-register language
IELTS Writing is semi-formal. Two registers commonly leak in:
- Too informal. Contractions ("don't", "can't"), slang ("kids" for "children"), conversational openings ("Well, I think…"). These drag the Task Response and Lexical Resource bands.
- Too memorised. Phrases like "In this contemporary epoch…" or "It cannot be gainsaid that…" announce that you've memorised. Examiners are trained to discount template language; using a lot of it actively lowers your score.
The aim is neutral, precise prose. If you can imagine the sentence in a broadsheet newspaper opinion column, you're at the right register.
06. Tense and subject–verb consistency
Task 1 reports (especially of data) require careful tense use — past for completed periods, present perfect for continuing trends, future for projections. Most candidates pick one tense and stick with it, which is fine for some charts and wrong for others.
Subject–verb agreement slips are easy to make in long sentences with intervening clauses: "The number of students who are enrolling in online courses are growing" — the verb should agree with "number" (singular), not "students" (plural).
These errors don't usually obscure meaning, but they cap the GRA band at 6.5. Catching them is one of the highest-yield rewrite steps.
Want a structured way to spot these in your own writing? Submit an essay and you'll get a per-criterion breakdown.
Try the writing workspace07. Skipping the rewrite step entirely
In a real exam, you have ten minutes at the end to re-read and fix. Almost no candidate uses them well. The single most useful rewrite habit is to read your response with one specific question per pass — not "is this good?" but:
- Pass 1: does every paragraph have a topic sentence?
- Pass 2: did I address every part of the prompt?
- Pass 3: any sentence longer than 25 words I should split?
- Pass 4: any word I'm not 100% sure I spelled right?
Four targeted passes will catch more than one anxious read-through.
08. The meta-mistake: practising without feedback
Writing ten essays without feedback rarely moves your band. You repeat the same mistakes because you don't know they're mistakes. Two or three essays with specific per-criterion feedback move you further than ten essays in a vacuum.
If your study time is limited, prioritise:
- One timed essay under real conditions.
- A focused review of where each criterion lost marks.
- A rewrite of the single weakest paragraph, not the whole essay.
- A second AI band estimate on the rewrite to see whether the change moved the score.
That tight loop is what closes the gap. The writing workspace is built around exactly this cycle.
Start a timed writing practice