IELTS Writing Task 1 trips up test-takers who prepare without understanding how it is actually marked. You can spend weeks writing practice responses and still miss band targets if you are optimising for the wrong things. This guide gives you a clear picture of the four marking criteria, what each one means in practice, and where most test-takers lose points without realising it.
Before you go further: if you are not sure what band score you are currently sitting at, the IELTS Express Pre-Test gives you a personalised band prediction for $4.99 — a useful starting point before committing to a full preparation plan.
The Four Marking Criteria in IELTS Writing Task 1
Every IELTS Writing Task 1 response is assessed on four equal criteria, each worth 25% of your Task 1 score:
- Task Achievement
- Coherence and Cohesion
- Lexical Resource
- Grammatical Range and Accuracy
Understanding what each criterion actually measures is not the same as knowing how to hit Band 7 in each one. Let us break them down one by one.
Task Achievement: More Than Just Covering the Data
Task Achievement asks whether your response does what the task asks. For Academic Task 1, that means describing, summarising, or explaining visual data accurately and with appropriate coverage.
Where test-takers lose points:
Missing the overview is the most common Band 5 trap. An overview — a sentence or two that summarises the main trend or most significant comparison — is expected in every Academic Task 1 response. Leaving it out typically caps your Task Achievement score at Band 5, regardless of how accurate your data descriptions are.
Describing everything equally is another problem. Good responses select and prioritise the most significant features. Listing every single data point without any sense of what matters most shows a lack of analytical judgement. Examiners notice this.
Small data errors — wrong percentages, reversed comparisons — are also penalised directly under Task Achievement. Misreading the chart by even a small margin affects your credibility as a writer, not just your accuracy.
A Band 7 Task Achievement response presents a clear overview, covers key features accurately, and makes relevant comparisons — without simply transcribing all the data in the visual.
Coherence and Cohesion: How Your Writing Flows
Coherence refers to how logically your ideas are organised. Cohesion refers to how well sentences and paragraphs are linked together.
Common Band 5 to 6 patterns in this area include using the same cohesive devices throughout — “Additionally… Furthermore… Moreover…” — which signals a limited range rather than genuine cohesion. Starting every sentence with a linking word actually disrupts flow rather than improving it.
Poor paragraph organisation is also a Coherence and Cohesion issue. Grouping data randomly rather than by meaningful comparison (for example, comparing countries by time period rather than by trend) makes responses harder to follow and reduces your CC score.
For Band 7, your response should move logically from overview to key feature groups, with clear paragraph breaks and linking language that varies naturally. The structure should feel deliberate, not mechanically assembled.
Lexical Resource: Vocabulary Beyond Paraphrase
Lexical Resource measures the range and accuracy of your vocabulary. In Task 1, this comes down to three things: your ability to paraphrase the task prompt, your use of data language, and accurate word choice with minimal spelling errors.
Data language is where most test-takers either strengthen or weaken their Lexical Resource score. Phrases like “increased sharply,” “declined steadily,” and “remained relatively stable” are the vocabulary of Task 1 — and knowing the difference between “rose marginally” and “increased sharply” matters more than using a wide range of unrelated vocabulary.
Most test-takers sit at Band 6 because they have an adequate range but overuse certain phrases or occasionally use words that are slightly off in context. Band 7 requires both range and precision.
If you want to build your data vocabulary before test day, the IELTS Writing Task 1 Practice Test includes structured practice with model answers you can study for vocabulary patterns.
Grammatical Range and Accuracy: The Two-Part Test
The criterion name tells you exactly what is being assessed: range (variety of structures) and accuracy (correct usage).
Most test-takers focus only on accuracy — avoiding errors. But range matters equally. Writing exclusively in short, simple sentences, even if every sentence is grammatically correct, will cap you at Band 5 to 6 under this criterion.
Band 7 expects a mix of complex and simple sentence structures, correct use of relative clauses, passive voice, and comparison structures, and errors that are rare and do not affect meaning.
You do not need to write in complicated sentences. You need to show that you can — by including some complex structures alongside simpler ones. One or two well-formed relative clauses or passive constructions in a 180-word response is enough to demonstrate range.
What Separates Each Band Level in Practice
Here is a practical breakdown of what distinguishes responses at each level:
Band 5 responses cover the task but typically miss the overview or misread key data. Vocabulary is basic and repetitive. Some grammar errors affect clarity. Cohesive range is limited to a few repeated devices.
Band 6 responses include an overview, but it may be vague or underspecified. Vocabulary range is adequate but not always precise. Grammar is mostly accurate. Cohesion is present but sometimes overused or mechanical in execution.
Band 7 responses have a clear, accurate overview. Key features are selected and compared well. Vocabulary is varied and precise for the task. A mix of grammatical structures is used with few errors. Cohesion feels natural rather than forced.
Band 8 and above combines all of the above with genuine sophistication in how data is interpreted — vocabulary and grammar that goes beyond competency into real control of the language.
For most test-takers targeting migration or university entry, Band 7 is the primary goal. Getting there is less about knowing more English and more about understanding what the examiner is looking for in each criterion and consistently delivering on it.
Practising under realistic test conditions is where most improvement happens. Unlimited IELTS mock tests let you track progress across all four criteria with scored responses in test-day format.
How to Approach Each Criterion in Your Practice
Knowing the four criteria is not useful unless it changes what you actually do when you sit down to write. Here is how to target each one in practice sessions:
For Task Achievement: Always write your overview before your body paragraphs. Decide what the most important trends are before you describe anything. Read the chart carefully — confirm you have the right data before you write a single figure.
For Coherence and Cohesion: Plan your paragraph structure in the first 60 seconds. Group the data into two or three meaningful comparisons. Use a range of cohesive devices — not just “Furthermore” — and include logical sequencing words like “while,” “by contrast,” and “in comparison.”
For Lexical Resource: Build a vocabulary bank for graphs and charts: verbs (increase, decline, plateau, fluctuate), adverbs (sharply, steadily, marginally, dramatically), and noun forms (a sharp rise, a gradual decline). Use all three forms in your writing.
For Grammatical Range and Accuracy: Write your first sentence in a complex structure. Include at least one relative clause and one passive construction. Check your final sentence for subject-verb agreement — a common careless error that is easy to fix at review.
If you are also working on the Writing Task 2 essay, the IELTS Writing Task 2: Band Score Strategy post covers the same marking framework applied to discursive writing — useful for understanding how the criteria shift between tasks.
Ready to find out your IELTS band score?
Take the IELTS Express Pre-Test for just $4.99 and get your personalised band prediction with a 14-day improvement plan.
Frequently Asked Questions
Which criterion matters most in IELTS Writing Task 1?
All four criteria carry equal weight at 25% each. That said, Task Achievement is where the most predictable points are lost — missing the overview or misreading data can cap your score regardless of how strong your language is.
How long should a Task 1 response be?
The minimum is 150 words. Most Band 7 responses fall between 160 and 200 words. Writing more than 200 words is not necessarily better — selection and quality of information matter more than length beyond the minimum.
Can I reach Band 7 in Task 1 with some grammar errors?
Yes. Band 7 under Grammatical Range and Accuracy allows for occasional errors — provided your range of structures is genuinely varied. Minor slips that do not affect meaning will not disqualify a well-structured, accurate response from Band 7.
What does a good Task 1 overview actually look like?
A good overview summarises the most significant overall trend or comparison without including specific numbers. For example: “Overall, car ownership increased across all age groups between 2000 and 2020, with the sharpest growth occurring among 18 to 34 year olds.” Specific data belongs in the body paragraphs.
Is Task 1 marked the same way for Academic and General Training?
No. Academic Task 1 uses the four criteria above to assess data description. General Training Task 1 is a letter-writing task assessed under slightly different band descriptors. This guide applies specifically to the Academic test.
How much of the overall Writing band score does Task 1 affect?
Task 1 accounts for one-third of your total Writing band score. Task 2 accounts for the other two-thirds, which is why examiners generally recommend spending 20 minutes on Task 1 and 40 minutes on Task 2.
