IELTS Writing band scores
Why is my IELTS writing stuck at 6 or 6.5?
If you keep landing on the same band no matter how hard you study, the problem is rarely your whole essay. It is usually one or two of the four criteria quietly capping your average. This page shows how to diagnose which one, and what each weak area looks like on the page.
In short
- Your Writing band is the average of four criteria, so one or two weak ones pull a strong essay down to 6 or 6.5.
- The usual culprits are repetitive vocabulary, few accurate complex sentences, a weak Task 1 overview, or under-length essays.
- You cannot fix what you cannot see: a correction marks each criterion so you target the one holding you back.
Your band is an average, so one weak criterion caps it
IELTS Writing is marked on four equally weighted criteria: Task Response (called Task Achievement on Task 1), Coherence & Cohesion, Lexical Resource, and Grammatical Range & Accuracy. Your reported Writing band is the average of these four, rounded to the nearest half. Task 2 counts roughly twice as much as Task 1 in the overall calculation.
That averaging is why you feel stuck. A 6.5 is not a single weakness spread evenly across your writing. It is much more often two sevens and two sixes, or three sixes and one seven. You are already producing band 7 work in part of your essay. The problem is the one or two criteria sitting at 6 that drag the average back down.
This matters because generic advice does not move the needle. Telling someone with strong ideas but repetitive vocabulary to "develop more ideas" wastes their effort. The fast route off a plateau is to find the specific criterion that is low and work only on that. The next section shows what each weakness looks like.
The four common causes, and how to spot each
Repetitive vocabulary (Lexical Resource). You reach for the same handful of words: important, good, people, problem, society. Band 7 needs a wider range used accurately and some less common items. The tell is reading your essay and seeing the same noun three times in one paragraph where a synonym or rephrase would do.
Few or inaccurate complex sentences (Grammatical Range & Accuracy). If most of your sentences are short and simple, or your attempts at complex ones contain errors, this criterion caps at 6. Band 7 wants a mix of sentence forms with errors in only a minority of them. Count your subordinate clauses: if nearly every sentence is one main clause, that is your ceiling.
Weak overview or under-length (Task Achievement / Task Response). On Task 1, a missing or vague overview sentence stating the main trend is the single most common cap. On Task 2, going under the 250-word minimum or answering only half a two-part question holds you here regardless of language. Task 1 needs at least 150 words.
Mechanical linking (Coherence & Cohesion). Starting every paragraph with Firstly, Secondly, Moreover, In conclusion reads as forced. Band 7 cohesion is mostly invisible: pronouns, referencing, and natural connection between ideas, not a label glued to the front of each sentence. Over-using obvious connectors actually signals band 6, not 7.
A quick self-diagnostic
Take your last practice essay and check it against the table below. Each symptom you recognise points to the criterion that is most likely capping your average. If you tick boxes across two criteria, those two are your priority, not the ones already at 7.
| Criterion | What a band 6 looks like | The band 7 fix |
|---|---|---|
| Lexical Resource | Same words repeated; only common, safe vocabulary | Wider range, some less common words, used accurately |
| Grammatical Range & Accuracy | Mostly short, simple sentences; errors in complex ones | A mix of forms with errors in only a minority |
| Task Achievement (Task 1) | No clear overview; under 150 words; key features missed | A clear overview sentence plus accurate key data |
| Task Response (Task 2) | Answers half the question; under 250 words; thin support | Both parts covered, clear position, ideas extended |
| Coherence & Cohesion | A linking word bolted to the start of every sentence | Referencing and pronouns; cohesion you barely notice |
The honest limit of self-diagnosis is that the criteria capping you are usually the ones you cannot see in your own writing, which is exactly why they are stuck. A human correction marks a real essay against all four descriptors and points to the lines that cost marks. See how the correction works or start with a single task correction.
Stuck at 6 or 6.5: common questions
Why is my IELTS writing stuck at 6 or 6.5?+
Almost always one or two of the four criteria are dragging your average down while the others sit at 7. The usual culprits are repetitive vocabulary, too few accurate complex sentences, a weak or missing Task 1 overview, or under-length essays. A correction shows which criterion is capping you.
Why do I keep getting 6.5 when my English feels fluent?+
Fluent speech does not map to the band descriptors. IELTS rewards a wide range of vocabulary used accurately and a mix of complex sentence structures with few errors. Comfortable, repetitive writing reads as band 6 even when it is natural and clear.
Which criterion is most often holding people at band 6?+
Lexical Resource and Grammatical Range & Accuracy are the most common ceilings. Repeated words and a narrow set of safe, simple sentences both cap those two criteria at 6, which pulls the overall average to 6 or 6.5 even with strong ideas.
Does a half-band gap mean I am close to band 7?+
Not always. The reported Writing band is the average of the four criteria rounded to the nearest half. A 6.5 can mean three sixes and one seven, or two sevens and two sixes. You need to know which criteria are low, not just the overall number.
How do I find out exactly why I am stuck?+
Have a real essay marked against the four criteria by a teacher. A human correction gives you a band per criterion and points to the specific lines that cost marks, so you fix the one or two weak areas instead of guessing.