If you want to know how to improve your IELTS speaking score, the first thing worth understanding is that the test does not reward performance. It rewards communication. The examiner is not waiting to be dazzled; they are listening to see whether your English gets in the way of being understood — or whether it does the job cleanly, flexibly, and accurately. That distinction shapes everything that follows.
This guide works through the four official marking criteria and explains, band by band, what separates one score from the next — and what to do about it.
The four criteria you are actually marked on
IELTS speaking is marked on four equally weighted categories. Each represents 25% of your score:
- Fluency and coherence — how smoothly and logically you speak
- Lexical resource — the range and accuracy of your vocabulary
- Grammatical range and accuracy — the variety and correctness of your sentence structures
- Pronunciation — clarity, word stress, intonation, and individual sounds
Most candidates spend nearly all their time on vocabulary. That is understandable — vocabulary feels concrete to study. But pronunciation and fluency are just as valuable, and for many speakers they are the categories with the most room to improve quickly.
Fluency and coherence: what it really means
Fluency does not mean speaking fast. It means speaking without unnecessary breakdown. A fluent speaker at band 7 or above produces connected sentences without long pauses to search for words, without repeating themselves to buy time, and without filler sounds like um and er appearing every few seconds.
Coherence is the logical thread. Your answer should move from one idea to the next in a way that a listener can follow without effort.
Moving from band 5 to band 6
At band 5, a speaker often uses repetition and self-correction to keep going. They reach for the same connectors repeatedly — and, but, also, because — and sometimes trail off mid-sentence.
The fix is not longer answers. It is structured ones. Practise giving short, complete responses before building length. A reliable structure for Part 2 is: state your main point, give a specific example, and briefly explain why it matters to you. Three parts. Complete sentences throughout.
Also, become aware of your filler sounds. Record yourself answering a Part 1 question — something like "Tell me about the area where you grew up." Count your ums and ers. Most speakers are surprised. The goal is not to eliminate all hesitation — that would sound robotic — but to replace involuntary noise with a brief, intentional pause. A pause is coherent. Ummm is not.
Moving from band 6 to band 7
At band 6, the examiner can follow you, but they may have to work slightly harder than they should. The gaps between ideas are a little long; the connectors are functional but limited; answers to abstract Part 3 questions feel thin.
At band 7, your speech is largely fluent. There may be occasional hesitation, but it does not disrupt communication. Crucially, you are developing ideas rather than listing them.
Compare these two responses to "Do you think cities have become too crowded?"
Band 6: "Yes, I think cities are very crowded now. Many people move to cities for work. It can be a problem."
Band 7: "In many cases, yes. People move to cities because that's where the jobs are concentrated, so the pressure on housing and transport is immense — and cities haven't always expanded quickly enough to keep pace with that."
The second answer does not use harder vocabulary for its own sake. It develops a line of reasoning. That is the shift.
Lexical resource: range, precision, and naturalness
Moving from band 5 to band 6
At band 5, a speaker uses a limited range of vocabulary and sometimes uses words incorrectly. The goal at this stage is accuracy before range — using the words you know correctly, in the right context, rather than reaching for impressive words and misusing them.
One effective exercise: take any topic that appears in IELTS Part 3 (technology, education, the environment, urbanisation) and write down ten words you actually know well enough to use correctly in a sentence. Not words you have memorised from a list, but words you could deploy naturally. Then practise saying sentences with them aloud until they are genuinely part of your spoken vocabulary, not just your written one.
Moving from band 6 to band 7
The difference here is precision and collocation. At band 7, a speaker chooses words that fit together the way a natural English speaker would put them.
For example, a band 6 speaker might say "a very big problem". A band 7 speaker might say "a significant problem" or "a growing concern". Neither is flashier; the latter is simply more precise and more natural.
Collocations — the words that naturally travel together in English — are worth studying as phrases rather than individual vocabulary items. Make a decision (not do a decision). Raise awareness (not increase awareness). Heavy traffic (not strong traffic). These small distinctions add up across a 14-minute test.
Grammatical range and accuracy
The band 6 to 7 shift
At band 6, a speaker uses a mix of simple and complex structures but makes errors when attempting anything more demanding. Subject-verb agreement slips; conditionals are avoided or incorrectly formed; relative clauses are sometimes unfinished.
The target at band 7 is to use a range of complex structures with some flexibility and accuracy. You do not need to use every structure in English. You need to use the ones you do attempt correctly, and to vary them enough that you are not relying only on simple sentences.
Three structures worth having under genuine control for IELTS speaking:
- The second conditional, for hypothetical opinion questions: "If public transport were more affordable, far fewer people would drive into city centres."
- Relative clauses, for giving definitions and context: "It's a shift that's been happening gradually over the past two decades."
- Passive voice, for describing processes or shared phenomena: "A lot of pressure is placed on young people to make these decisions very early."
Practise these structures in spoken sentences, not just in writing. The gap between knowing a grammar rule and using it naturally under speaking pressure is considerable.
Pronunciation: the most underestimated criterion
Many candidates assume pronunciation means accent — that they need to sound British or American to score well. They do not. The IELTS pronunciation criterion measures whether your speech is easy to understand: whether your word stress, sentence rhythm, and individual sounds create clarity or confusion.
You can learn more about what specifically affects spoken intelligibility on our how it works page.
Word stress
English word stress is not optional. Stressing the wrong syllable can make a word unrecognisable. Compare pho-TO-graph and pho-TO-graphy and pho-to-GRAPH-ic — the same root, three different stress patterns.
When you learn a new word, learn its stress pattern as part of the word itself, the way you learn its spelling. Say it aloud three times with the stress in the right place.
Sentence stress and rhythm
English is a stress-timed language. The important words in a sentence — the content words — receive more emphasis; the grammatical glue words reduce and blur together. "I'd like to TALK about a TRIP I took to the NORTH of the COUNTRY." The rhythm of that sentence, with its peaks and valleys, is what makes it sound natural.
A flat, syllable-by-syllable delivery — where every word receives equal weight — is harder to follow, regardless of accent. It also signals, to an examiner, a speaker who has not yet internalised English rhythm.
Intonation
In Part 3, candidates give opinions on abstract topics. Intonation is how you signal what you think is important, what is in contrast, and where your idea is still continuing versus where it is finished. Without intonation, even accurate sentences can sound uncertain or monotone.
Try saying: "It's a complex issue — there are real benefits, but the risks are considerable." The rise on benefits and the fall on considerable carry the meaning as much as the words do.
Understanding where your pronunciation creates difficulty for listeners — and having a specific way to address it — is exactly what ummute is built for.
A note on bands 7 to 8
Moving from band 7 to band 8 is the step many serious candidates find most frustrating, because the improvements required are subtle. At band 8, a speaker's hesitations are rare and brief; their vocabulary is flexible and idiomatic; their pronunciation consistently aids rather than occasionally hinders understanding. There are no shortcuts here. What produces band 8 is large volumes of deliberate spoken practice combined with accurate, specific feedback — not just on what is wrong, but on what is almost right.
The honest advice is this: record yourself regularly, listen critically, and focus on one criterion at a time. Trying to fix everything at once usually fixes nothing.
Your IELTS speaking score is not a reflection of your intelligence or your effort so far. It is a measurement of a specific, learnable skill — and like any skill, it responds to the right kind of practice, applied consistently, over time.