Most people stuck at 6 or 6.5 are not making more mistakes than a band 7 candidate. They are making different ones — and usually being too careful, not too careless.
Your overall band is the average of four criteria, rounded to the nearest half. That means one criterion sitting at 5.5 can hold down three that are already at 7. Below is what changes in each one, and the thing worth practising.
Fluency & Coherence
Flow, speed, hesitation, and how logically ideas connect.
At band 6
Willing to speak at length, but coherence sometimes slips — repetition, self-correction, or hesitation while you search for words.
At band 7
Speaks at length without obvious effort. Hesitation is about what to say, not how to say it, and connectives are used flexibly.
What to practise
Record yourself for two minutes and count the pauses where you were hunting for a word rather than a thought. That gap is the whole difference.
Lexical Resource
Range and precision of vocabulary, paraphrasing, and collocation.
At band 6
Enough vocabulary to talk about anything, with paraphrase attempted and sometimes successful.
At band 7
Vocabulary flexes to the topic, including some less common words and idiom — with the occasional wrong choice, which is expected at this band.
What to practise
Stop protecting your accuracy. Band 7 explicitly allows inappropriate word choices; band 6 is where safe, plain vocabulary keeps you.
Grammatical Range & Accuracy
Variety of structures and how error-free they are.
At band 6
A mix of simple and complex forms, with frequent errors in the complex ones — though they rarely block understanding.
At band 7
A range of complex structures used with some flexibility, and frequent error-free sentences.
What to practise
Complex does not mean long. Conditionals, relative clauses and comment clauses ('which is why…') are what's being counted.
Pronunciation
Clarity and intelligibility measured from your spoken audio.
At band 6
Generally understood throughout, though mispronunciation occasionally reduces clarity.
At band 7
All the positives of band 6 plus some features of band 8 — sustained clarity, with accent rarely costing the listener effort.
What to practise
Work on sentence stress and pausing rather than individual sounds. Intelligibility is the criterion, not sounding British.
The uncomfortable part
Band 7 descriptors explicitly tolerate error. Vocabulary may include inappropriate choices. Grammar may include persistent mistakes. Hesitation is allowed when you are thinking about the idea rather than hunting for the word.
Band 6 is frequently where careful candidates park themselves — speaking in short, safe sentences with vocabulary they are certain of, and never risking the less common word or the complex structure that band 7 requires evidence of. Accuracy alone does not move you up. Range under pressure does.
Where each criterion shows up
The three parts are not scored separately, but they give the examiner different evidence. Part 1 shows tense range and whether you can develop an answer. Part 2 is where sustained fluency and vocabulary range are most visible — two uninterrupted minutes is a lot of evidence. Part 3 is where complex grammar appears naturally, because speculation forces it.
Oliver scores all four criteria separately and shows you the transcript alongside them, so you can see which one is costing you the half band — rather than guessing. The first session is free.
This guide is written from the publicly published IELTS Speaking band descriptors, in our own words. For the official wording, see the British Council's band descriptors. MockLive AI is an independent practice tool and is not affiliated with IELTS, the British Council, IDP or Cambridge Assessment English.