IELTS Speaking Band Descriptors Explained: The Four Criteria in Plain English
Fluency and coherence, lexical resource, grammatical range and accuracy, pronunciation. What each criterion means, how Bands 5 to 8 differ, and what to train.
Quick answer
IELTS Speaking is scored on four equally weighted criteria: fluency and coherence, lexical resource, grammatical range and accuracy, and pronunciation. The examiner gives a band for each, and their average becomes your Speaking score. The public band descriptors describe what each band sounds like, so they are the most reliable guide to what to practise.
Everything in this guide is a plain-English reading of the official IELTS Speaking band descriptors (public version). Quotation marks show wording taken from that document. The official IELTS page on understanding your score confirms that each of the four criteria carries equal weighting and that the overall average gives the Speaking score.
Two practical consequences follow. First, a weakness in one criterion cannot be hidden by strength in another; it pulls the average down. Second, the descriptors are cumulative and specific, so "speak better" is not a plan, but "stop mid-sentence searches for basic words" is.
Fluency and coherence: can you keep going, and does it hang together?
This criterion covers how continuously you speak and how logically your ideas connect. At Band 6, the descriptor says you are "able to keep going" and willing to produce long turns, but coherence "may be lost at times" through hesitation, repetition or self-correction. At Band 7, you can "keep going and readily produce long turns without noticeable effort", and you use discourse markers and connectives flexibly. At Band 8, hesitation is mostly "content related" rather than a search for words or grammar.
What examiners hear in practice: hesitation while choosing an idea is normal; hesitation while hunting for a basic word or tense is what keeps candidates lower. The fluency and pronunciation guide for IELTS turns this into drills.
Lexical resource: range, precision and paraphrase
Lexical resource is about vocabulary: how wide it is, how precisely you use it, and whether you can paraphrase when a word does not come. At Band 6, the resource is "sufficient to discuss topics at length" and meaning is clear even when word choice is sometimes inappropriate. At Band 7, it is used flexibly across a variety of topics, with "some ability to use less common and idiomatic items" and an awareness of style and collocation. At Band 8, a wide resource is used "readily and flexibly" and less common and idiomatic items are used skilfully.
The descriptors reward natural collocation ("a demanding job", "heavy traffic") and successful paraphrase more than rare words. A memorized idiom used in the wrong context counts against you.
Grammatical range and accuracy: variety without breakdowns
This criterion balances two things: the range of structures you use and how accurate they are. At Band 6, you use a mix of simple and complex forms with "limited flexibility", and errors in complex structures are frequent but "rarely impede communication". At Band 7, "a range of structures" is used flexibly and "error-free sentences are frequent". At Band 8, "the majority of sentences are error free".
Candidates usually get stuck in one of two ways: playing safe with short sentences (range too narrow) or attempting long sentences that collapse (accuracy too low). The Band 7 guide explains how to build a small set of complex patterns you can use reliably.
Pronunciation: how easily you are understood
Pronunciation covers individual sounds, word and sentence stress, intonation, rhythm and connected speech. At Band 6, you "can generally be understood throughout without much effort", although stress and intonation control is not sustained. Band 7 shows all the positive features of Band 6 and some, but not all, of Band 8. At Band 8, you "can be easily understood throughout" and "accent has minimal effect on intelligibility".
Accent itself is not penalized; intelligibility is what counts. Turkish, Vietnamese, Spanish or any other first-language accent is fine if the listener does not have to work to understand you.
Bands 5 to 8 at a glance
| Criterion | Band 5 | Band 6 | Band 7 | Band 8 |
|---|---|---|---|---|
| Fluency and coherence | Keeps going with repetition, self-correction or slow speech | Willing to speak at length; coherence sometimes lost | Long turns without noticeable effort; flexible connectives | Fluent; hesitation mostly about content |
| Lexical resource | Enough for familiar and unfamiliar topics, limited flexibility | Enough to discuss topics at length; paraphrases successfully | Flexible; some less common and idiomatic items | Wide and flexible; skilful idiomatic use |
| Grammatical range and accuracy | Basic forms fairly well controlled; complex forms usually contain errors | Mix of simple and complex forms; frequent errors in complex ones | Range of structures; error-free sentences are frequent | Wide range; majority of sentences error free |
| Pronunciation | All of Band 4 and some, but not all, of Band 6 | Generally understood without much effort; control not sustained | All of Band 6 and some of Band 8 | Easily understood throughout; accent has minimal effect |
How to use the descriptors in your own practice
WitSpeak gives feedback on the same four criteria after each IELTS-style practice session, with an estimated band per criterion. These estimates are practice guidance only. Only a certified IELTS examiner gives an official score. For the overall exam structure and a study plan, see the IELTS Speaking guide.
- Score each criterion separately after every practice answer. An overall impression hides which criterion is holding you back.
- Pick the lowest criterion and train only that for a week, then re-check.
- Compare recordings, not feelings. Listen for the specific behaviours above, such as mid-sentence word searches or unclear word stress.
- Use all three parts of the test, because each one exposes different criteria: Part 2 tests fluency hardest, while Part 3 tests range and coherence in abstract discussion.
Frequently asked questions
What are the four IELTS Speaking assessment criteria?
Fluency and coherence, lexical resource, grammatical range and accuracy, and pronunciation. The examiner gives a band for each criterion, and they carry equal weight in your Speaking score.
How is the IELTS Speaking score calculated?
The examiner awards a band for each of the four criteria, and the official IELTS guidance says the overall average gives the Speaking score. A low band in one criterion therefore lowers the result even when the other three are strong.
Does my accent lower my IELTS Speaking score?
Not by itself. The pronunciation descriptors focus on how easily you are understood. At the higher bands the wording is that accent has minimal or no effect on intelligibility, so a clear accented speaker can score well.
Where can I read the official band descriptors?
IELTS publishes a public version of the Speaking band descriptors as a PDF on ielts.org. It describes Bands 0 to 9 for each criterion. This article links to it and paraphrases Bands 5 to 8.
Are AI band scores the same as official IELTS scores?
No. AI practice tools, including WitSpeak, give estimated bands to guide practice. Official scores come only from certified IELTS examiners in the real test, so treat any practice score as a direction, not a prediction.
