Understanding Band Descriptors in Detail

Band descriptors are the official criteria that IELTS examiners use to score your Writing and Speaking. Understanding exactly what each band level requires — and what distinguishes one band from the next — allows you to target your preparation with surgical precision. This lesson dissects the band descriptors for Writing and Speaking so you know precisely what to aim for.

---

What Are Band Descriptors?

Band descriptors are detailed descriptions of the performance expected at each band level (1–9) for each assessment criterion. They are published by Cambridge Assessment English and are freely available on the IELTS website.

For Writing, there are separate descriptors for:

• Task 1 (Academic) — Task Achievement
• Task 1 (General Training) — Task Achievement
• Task 2 — Task Response
• Coherence and Cohesion (shared)
• Lexical Resource (shared)
• Grammatical Range and Accuracy (shared)

For Speaking, there are descriptors for:

• Fluency and Coherence
• Lexical Resource
• Grammatical Range and Accuracy
• Pronunciation

---

Writing Task 2: Task Response (Bands 5–8)

Task Response is about how well you answer the question. Here is what each band requires:

Band	Key Requirements
5	Addresses the task only partially; the format may be inappropriate in places; a position is expressed but development is not always clear; some main ideas are presented but limited; there may be a tendency to over-generalise or focus on details
6	Addresses all parts of the task although some parts may be more fully covered than others; presents a relevant position although conclusions may be unclear or repetitive; presents relevant main ideas but some may be inadequately developed or unclear
7	Addresses all parts of the task; presents a clear position throughout the response; presents, extends and supports main ideas but there may be a tendency to over-generalise and/or supporting ideas may lack focus
8	Sufficiently addresses all parts of the task; presents a well-developed response to the question with relevant, extended and supported ideas

What This Means in Practice

Moving from Band 6 to Band 7	Specific Action
"Addresses all parts of the task" → "Addresses all parts" with a "clear position throughout"	Your thesis/position must be stated in the introduction AND maintained consistently in every body paragraph. Do not contradict yourself or sit on the fence unless the task asks you to discuss both views.
"Relevant position although conclusions may be unclear" → "Clear position throughout"	Your conclusion must clearly restate your position, not introduce new ideas or hedge.
"Some ideas inadequately developed" → "Presents, extends and supports main ideas"	Every main idea needs an explanation AND an example or supporting detail. A body paragraph with only a topic sentence and one supporting sentence will not reach Band 7.

---

Writing: Coherence and Cohesion (Bands 5–8)

Band	Key Requirements
5	Presents information with some organisation but there may be a lack of overall progression; makes inadequate, inaccurate or over-use of cohesive devices; may be repetitive because of lack of referencing and substitution
6	Arranges information and ideas coherently and there is a clear overall progression; uses cohesive devices effectively but cohesion within and/or between sentences may be faulty or mechanical; may not always use referencing clearly or appropriately
7	Logically organises information and ideas; there is clear progression throughout; uses a range of cohesive devices appropriately although there may be some under/over-use; presents a clear central topic within each paragraph
8	Sequences information and ideas logically; manages all aspects of cohesion well; uses paragraphing sufficiently and appropriately

Common Coherence and Cohesion Mistakes

Mistake	Why It Costs Marks	Fix
Starting every sentence with a linking word ("Firstly... Secondly... Moreover... Furthermore...")	Mechanical overuse of cohesive devices — caps you at Band 6	Use a variety: reference pronouns (this, these, such), synonyms, sentence structure variation
No clear topic sentence in paragraphs	Examiner cannot identify your main point — hurts both Coherence and Task Response	Start each body paragraph with a clear topic sentence that states the paragraph's main idea
Paragraphs that are too long or too short	One-sentence paragraphs look undeveloped; paragraphs over 100 words become hard to follow	Aim for 3–5 sentences per paragraph; each paragraph covers one main idea
Ideas presented in random order	No logical flow — the reader has to work to follow your argument	Plan your essay structure before writing: introduction → body paragraph 1 (strongest point) → body paragraph 2 → (optional body paragraph 3) → conclusion

---

Writing: Lexical Resource (Bands 5–8)

Band	Key Requirements
5	Uses a limited range of vocabulary but this is minimally adequate for the task; may make noticeable errors in spelling and/or word formation that may cause some difficulty for the reader
6	Uses an adequate range of vocabulary for the task; attempts to use less common vocabulary but with some inaccuracy; makes some errors in spelling and/or word formation but they rarely reduce communication
7	Uses a sufficient range of vocabulary to allow some flexibility and precision; uses less common lexical items with some awareness of style and collocation; may produce occasional errors in word choice, spelling and/or word formation
8	Uses a wide range of vocabulary fluently and flexibly to convey precise meanings; skilfully uses uncommon lexical items but there may be occasional inaccuracies in word choice and collocation; produces rare errors in spelling and/or word formation

What "Less Common Vocabulary" Actually Means

"Less common vocabulary" does not mean obscure or impressive-sounding words. It means vocabulary that is:

Category	Example (Band 6 → Band 7)
Precise rather than general	"important" → "pivotal", "crucial", "instrumental" (choosing the right one for context)
Topic-specific	"global warming" → "anthropogenic climate change", "carbon emissions", "ecological footprint"
Collocations	"make a decision" → "reach a decision", "arrive at a conclusion"
Academic register	"a lot of people think" → "it is widely acknowledged that", "a prevailing view holds that"