IELTS Writing band descriptors decoded: what separates 6.5 from 7.0
A precise breakdown of every criterion at Band 6 versus Band 7 — so you know exactly what the examiner is marking.
Most candidates who score 6.5 in IELTS Writing are not far from 7.0. The gap is rarely about effort — it is about not knowing precisely what the examiner is looking for at each band level. IELTS Writing Task 2 is marked on four public criteria, each scored from 1 to 9 in whole bands. Understanding what the official band descriptors actually say at Band 6 versus Band 7 is the most direct route to closing that gap.
How your overall Writing band score is calculated
Your Task 2 band score is the average of four criterion scores: Task Response (TR), Coherence and Cohesion (CC), Lexical Resource (LR), and Grammatical Range and Accuracy (GRA). Each criterion carries equal weight. The four scores are added and divided by four, then rounded to the nearest 0.5. This means a single weak criterion drags the whole score down — and a single strong one cannot compensate indefinitely.
Rounding rule: the four criterion scores are averaged and rounded to the nearest 0.5. So scores of 7, 6, 7, 6 average to 6.5 — not 7.0. Improving your weakest criterion by one band point raises your overall score by 0.5.
This arithmetic has a practical consequence: identifying your lowest criterion and targeting it specifically is more efficient than trying to polish everything at once. The sections below give you the exact language of the public descriptors for Band 6 and Band 7 on each criterion.
Criterion 1: Task Response (TR)
Task Response measures whether you have answered the question fully, taken a clear position, and supported your ideas with relevant, developed arguments. It is the first thing an examiner reads for.
Band 6 vs Band 7 on Task Response
At Band 6, the descriptor states the response addresses the task although some parts may be more fully covered than others. The position is relevant but the conclusions may not always be fully extended or supported. Ideas are present but development can be thin or inconsistent.
At Band 7, the response addresses all parts of the task and presents a clear position throughout. Main ideas are extended and supported, though there may be a tendency to over-generalise or supporting arguments may not always be fully justified. The critical shift is from partial coverage to full coverage, and from a position that occasionally wobbles to one that holds consistently across the essay.
What this means in practice
- Read the prompt twice and identify every sub-question — Band 7 requires all parts addressed, not just the dominant one.
- State your position in the introduction and restate it explicitly in the conclusion — do not let it drift.
- Every body paragraph should have a main idea, an explanation, and at least one concrete example or elaboration. A paragraph that stops at assertion is a Band 6 paragraph.
Criterion 2: Coherence and Cohesion (CC)
Coherence and Cohesion covers the logical organisation of information, the clarity of progression through the essay, and the skill with which linking devices and reference chains are used. It is the criterion most often misunderstood — candidates assume that adding more discourse markers automatically raises the score. It does not.
Band 6 vs Band 7 on Coherence and Cohesion
At Band 6, information and ideas are generally arranged coherently and there is a clear progression. Cohesive devices are used but not always accurately — use may be faulty or mechanical. Paragraphing may not always be logical or central topic sentences may be absent or unclear.
At Band 7, information and ideas are logically organised, with a clear overall progression. A range of cohesive devices is used flexibly and appropriately. Paragraphing is generally used effectively, with clear central topics. The distinction is between devices used mechanically (Band 6 — e.g., starting every sentence with 'Furthermore' or 'However') and devices used with genuine logic to signal real relationships between ideas (Band 7).
What this means in practice
- Each paragraph should open with a clear topic sentence that tells the reader what the paragraph is about — not a discourse marker alone.
- Vary your cohesive devices: use pronouns, synonyms, and demonstratives (this argument, these factors) rather than relying only on additive or contrastive connectives.
- Check that every sentence follows logically from the one before. If you need a discourse marker to make the connection work, the logic may already be missing.
Criterion 3: Lexical Resource (LR)
Lexical Resource measures the range, accuracy, and appropriacy of the vocabulary you use. At the 6-to-7 boundary, the examiner is looking for evidence that you can deploy less common vocabulary with awareness of how words behave in context.
Band 6 vs Band 7 on Lexical Resource
At Band 6, there is an adequate range of vocabulary for the task. Attempts are made to use less common vocabulary but with some inaccuracy. Errors in spelling and word formation occur but do not impede communication.
At Band 7, there is sufficient range of vocabulary to allow some flexibility and precision. Less common items are used with awareness of style and collocation, though some incorrectly chosen words may appear. Errors in spelling and word formation are rare and do not impede communication. The key shift is from attempting less common words with hit-or-miss accuracy (Band 6) to deploying them with awareness of collocation and register (Band 7).
What this means in practice
- Collocation is the primary test at Band 7: it is not enough to use an unusual word — it must sit naturally with the words around it. 'Make a significant contribution' is collocated; 'do a significant contribution' is not.
- Avoid recycling the same high-frequency words (important, problem, increase) in every paragraph. Find precise alternatives that fit the specific idea.
- When you learn a new word, learn two or three words that commonly precede or follow it — not just its definition.
Criterion 4: Grammatical Range and Accuracy (GRA)
Grammatical Range and Accuracy assesses the variety of sentence structures you use and the accuracy with which you use them. Range and accuracy are scored together — a narrow range used perfectly is still Band 6 at most.
Band 6 vs Band 7 on Grammatical Range and Accuracy
At Band 6, a mix of simple and complex sentence forms is used. Some errors are present but they rarely impede communication. The descriptor implies that complex structures appear, but errors in them are noticeable.
At Band 7, a variety of complex structures is used. Frequent error-free sentences are produced, though some grammatical mistakes persist. Good control of grammar and punctuation is evident but not fully consistent. The critical upgrade is from 'some errors, rarely impeding' (Band 6) to 'frequently error-free' (Band 7) — and from 'a mix of simple and complex' to 'a variety of complex structures'.
What this means in practice
- Aim for at least two clearly complex structures per paragraph: relative clauses, passive constructions, conditional sentences, participle phrases, or noun clauses.
- Do not use complex structures tentatively and then avoid them for the rest of the essay. Consistent deployment matters.
- The most common GRA errors at Band 6 are article misuse, subject-verb agreement in long sentences, and tense inconsistency — audit for these specifically.
Band 6 vs Band 7 at a glance
| Criterion | Band 6 | Band 7 |
|---|---|---|
| Task Response | Addresses task; some parts more fully covered than others; position occasionally unclear or unsupported | Addresses all parts; clear position throughout; ideas extended and supported, though may over-generalise |
| Coherence & Cohesion | Generally coherent; cohesive devices used but may be faulty or mechanical; paragraphing not always logical | Logically organised with clear progression; cohesive devices used flexibly and appropriately; paragraphing generally effective |
| Lexical Resource | Adequate range; attempts less common vocabulary with some inaccuracy; errors in spelling/word form present | Sufficient range allowing flexibility and precision; less common items used with awareness of collocation and style; rare spelling/word form errors |
| Grammatical Range & Accuracy | Mix of simple and complex sentences; errors present but rarely impede communication | Variety of complex structures; frequent error-free sentences; good control though not fully consistent |
Putting it together: the 6.5 to 7.0 plan
The descriptors above make clear that the 6-to-7 jump on every criterion involves a shift from partial or inconsistent performance to consistent, controlled performance. A Band 6 essay does most things adequately. A Band 7 essay does all the required things reliably — full task coverage, logical structure, appropriate vocabulary, and grammatically varied sentences — even if it is not flawless.
The Band 7 Writing Playbook structures this improvement as a sequence: fix Task Response first (it is the most tractable), then address your weakest remaining criterion. Trying to improve all four at once disperses attention and produces no clear gains. Use the table above to identify where your current essays lose points, then practise that criterion in isolation before combining the skills.
A Band 7 essay is not a brilliant essay. It is a controlled, consistent essay that fulfils every part of the task without falling apart grammatically or lexically.
Frequently asked
What is the difference between Band 6 and Band 7 in IELTS Writing?
Across all four criteria, Band 7 requires full and consistent performance where Band 6 only requires adequate or partial performance. In Task Response, Band 7 covers all parts of the task and holds a clear position throughout; Band 6 may leave some parts underdeveloped. In Coherence and Cohesion, Band 7 uses cohesive devices flexibly and appropriately; Band 6 uses them but often mechanically or inaccurately. In Lexical Resource, Band 7 shows awareness of collocation and style when using less common vocabulary; Band 6 attempts less common words but with some inaccuracy. In Grammar, Band 7 produces frequent error-free sentences using a variety of complex structures; Band 6 mixes simple and complex with noticeable errors.
How is the IELTS Writing band score calculated?
For Task 2, the examiner assigns a whole-band score (1–9) for each of the four criteria: Task Response, Coherence and Cohesion, Lexical Resource, and Grammatical Range and Accuracy. The four scores are added together, divided by four, and rounded to the nearest 0.5. Each criterion carries equal weight, so a single low score will reduce the overall result even if the other three are high.
Are IELTS Writing band scores rounded up?
No. IELTS Writing band scores are rounded to the nearest 0.5, not automatically rounded up. An average of 6.625 rounds to 6.5, not 7.0. The official rounding rule is standard arithmetic rounding to the nearest half-band.
What is a good IELTS Writing score?
Band 7.0 is widely considered the threshold for academic and professional purposes that require demonstrated English proficiency. Many universities and professional bodies — including UK immigration routes and some medical registration bodies — require at least 7.0 in Writing specifically. Band 6.5 is sufficient for entry-level academic admission at some institutions, but 7.0 is the target for competitive programmes.
Which IELTS Writing criterion is hardest to improve?
Lexical Resource and Grammatical Range and Accuracy typically take the most time to improve because they depend on accumulated knowledge of vocabulary and grammar patterns. Task Response is usually the quickest gain — it is primarily about reading the question carefully, structuring a clear argument, and covering all sub-questions fully. Candidates who plateau at 6.5 most commonly have a weakness in Coherence and Cohesion or Grammatical Range and Accuracy.
Educational information only — not immigration, legal or career advice. Verify current requirements with the relevant official body.