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IELTS Speaking Band Descriptors, Explained in Plain English

IELTS Speaking is marked on four criteria, each worth exactly a quarter of your score: Fluency & Coherence, Lexical Resource, Grammatical Range & Accuracy, and Pronunciation. The examiner gives each a whole band (0–9), then your overall speaking band is the average, rounded to the nearest half. That averaging is why knowing your weakest criterion matters more than any general advice: one criterion two bands below the others drags the whole score down half a band on its own.

The official descriptors are written in examiner language ("uses a range of connectives and discourse markers with some flexibility"). Here is what they actually mean in practice, band by band.

Fluency & Coherence

This is about flow and organization, not speed. Examiners distinguish two kinds of pausing: pausing to think about ideas (natural, happens at band 9) and pausing to search for words or grammar (penalized from band 6 down).

• Band 5: you keep going, but rely on repetition, self-correction, and slow speech; overuse of simple connectives ("and… and… so…").
• Band 6: willing to speak at length, but loses coherence sometimes; hesitation is noticeable and linking words are sometimes wrong.
• Band 7: speaks at length without noticeable effort; hesitation is mostly about ideas, not language; flexible linking.
• Band 8–9: speech flows with only rare, content-related hesitation; topics are developed fully and logically.

Lexical Resource

Range, precision, and flexibility of vocabulary — including paraphrase when you don't know a word. Memorized "band 9 phrases" that don't fit the question are recognized and discounted; examiners reward vocabulary that is appropriate, not exotic.

• Band 5: enough words to talk about familiar and unfamiliar topics, but with limited flexibility; attempts paraphrase with mixed success.
• Band 6: wide enough vocabulary to discuss topics at length; makes meaning clear despite wrong word choices; generally successful paraphrase.
• Band 7: uses some idiomatic language and less common words; aware of style and collocation, with occasional slips.
• Band 8–9: precise, natural, idiomatic word choice on any topic; paraphrases effortlessly when needed.

Grammatical Range & Accuracy

Two separate dials: how varied your structures are, and how often sentences come out error-free. Spoken grammar is judged as speech — incomplete sentences, restarts, and contractions are normal spoken features, not errors.

• Band 5: basic sentences are mostly right; complex sentences are attempted but usually contain errors.
• Band 6: a mix of simple and complex forms; errors are frequent but rarely block understanding.
• Band 7: a range of complex structures used with some flexibility; many sentences are completely error-free.
• Band 8–9: wide structural range; errors are rare and often self-corrected, or only occasional slips remain.

Pronunciation

Intelligibility first, features second. Accent is explicitly not penalized — what matters is whether the listener has to work to understand you, and whether you use stress and intonation to carry meaning.

• Band 5: generally understandable, but pronunciation features (stress, rhythm, intonation) are only partly controlled; some words need listener effort.
• Band 6: mostly clear; uses some features effectively, but control lapses over longer stretches.
• Band 7: easy to understand throughout; flexible use of stress and intonation, with occasional lapses.
• Band 8–9: effortless to understand; the full range of features used precisely and naturally; first-language accent has no effect on the score.

How to find your weakest criterion

You can't hear your own error rate or hesitation pattern reliably — nobody can. The practical options are a teacher who marks with the descriptors, or an automated examiner that does. WiderAI's AI mock test scores all four criteria separately against these descriptors (calibrated with real examiner-marked exams) and shows you, in about a minute, which criterion is holding your average down — plus your actual grammar mistakes with corrections and vocabulary upgrades from your own answers.