IELTS Writing Coherence and Cohesion Tips That Work

Coherence and cohesion is worth 25% of your IELTS Writing score. One quarter. And yet most test-takers spend almost all their preparation time on vocabulary and grammar, then wonder why their band score refuses to budge past 6.0. This lesson is here to fix that.

Here is the good news: this is one of the most learnable parts of the entire exam. You do not need a bigger vocabulary or a grammar overhaul. You need to understand how ideas connect, and then practise doing it deliberately.

What Coherence and Cohesion Actually Mean

People often treat these as one idea, but they are two distinct things.

Coherence is about logic. Does your writing make sense? Does each paragraph have one clear focus? Do your ideas move forward in a way a reader can follow? A coherent essay does not jump around or contradict itself. The examiner should never have to re-read a sentence to understand what you meant.

Cohesion is about connection. Do your sentences and paragraphs link to each other clearly? This is where linking words, reference words, and paragraph structure come in.

Think of coherence as the map and cohesion as the road signs. You need both. A good map with no signs is confusing. Signs on a road that goes nowhere are useless.

The Lesson: One Technique That Changes Everything

The single most effective thing you can do to improve both coherence and cohesion at the same time is to write a clear topic sentence at the start of every body paragraph.

A topic sentence does two jobs. It tells the reader what this paragraph is about, and it signals how this idea relates to your overall argument. Done well, it creates coherence (clear focus) and cohesion (logical flow from the previous paragraph) in one sentence.

Here is a weak paragraph opening:

There are many reasons why cities are becoming more crowded. People move from rural areas. Jobs are available. Infrastructure is better.

Those sentences are grammatically fine, but they feel like a list. There is no argument, no direction, no connection between ideas.

Now watch what happens with a proper topic sentence:

One major reason for urban growth is economic opportunity. People relocate from rural areas because cities offer a far greater concentration of jobs, higher wages, and better infrastructure for career development.

The topic sentence announces the idea. Every sentence that follows supports it. The paragraph has a spine.

This principle applies equally outside the exam. In a professional email, a well-structured paragraph with a clear opening line is the difference between a message your manager reads once and understands, and one they have to scroll back through twice while sighing.

If practising this kind of structured paragraph writing with real feedback sounds useful, that is exactly the work we do in daily coaching sessions. For more details, click here.

The Most Common Mistake

Over-relying on linking words. This is the number one cohesion error at every band level, and it is very easy to fall into.

Learners are often taught a list of connectors: furthermore, however, in addition, nevertheless, consequently. They then insert these words at the start of sentences like punctuation, hoping the examiner sees them as sophisticated.

The examiner sees through it immediately.

Here is what mechanical linking looks like:

Many people prefer to work from home. Furthermore, they can save time on commuting. However, some employees feel isolated. In addition, communication can become more difficult. Nevertheless, technology helps.

Every sentence has a connector. None of them are doing real work. The logic is not actually clear because the ideas are not developed, just listed and labelled.

The correction is to use fewer linking words, but use them purposefully. Ask yourself: does this connector reflect a real logical relationship between these two ideas? If the relationship is not obvious in the ideas themselves, a linking word will not create it.

Better cohesion often comes from pronoun reference and lexical chains, not connector words. Referring back to a noun with this, these, or such, or echoing a key word from the previous sentence, creates flow that feels natural rather than mechanical.

Compare:

Remote work has grown significantly in recent years. Furthermore, this trend shows no sign of reversing.

With:

Remote work has grown significantly in recent years. This shift shows no sign of reversing.

The second version flows better. The word shift echoes and develops the idea of growth, creating cohesion without any connector at all.

Three Practice Tips You Can Use Today

1. Audit your topic sentences. Take a Task 2 essay you have already written and underline only the first sentence of each body paragraph. Read those sentences in order. Do they tell a clear, logical story on their own? If not, rewrite them before touching anything else.
2. Do a linking word count. Go through a paragraph and circle every linking word. If you have more than two in a paragraph of five or six sentences, remove at least one and restructure the sentence to carry the logic instead.
3. Practise lexical chains. Pick a topic word from one of your paragraphs, for example pollution. List five related words or phrases you could use to refer to the same idea across a paragraph: environmental damage, harmful emissions, toxic byproducts, contamination, this problem. Varying your reference words reduces repetition and builds cohesion at the same time.

Vocabulary to Know

• coherence /kəʊˈhɪərəns/ – Level: B2 – the quality of being logical and consistent, with ideas that fit together clearly – Example: The essay lacked coherence because each paragraph introduced a completely new argument.
• cohesion /kəʊˈhiːʒən/ – Level: B2 – the way sentences and paragraphs are connected to each other through language – Example: Good cohesion means the reader never loses the thread of your argument.
• topic sentence /ˈtɒpɪk ˈsentəns/ – Level: B1 – the opening sentence of a paragraph that states its main idea – Example: A strong topic sentence tells the reader exactly what to expect from the paragraph.
• lexical chain /ˈleksɪkəl tʃeɪn/ – Level: C1 – a series of related words or phrases used across a text to maintain thematic continuity – Example: Using a lexical chain around the concept of urbanisation helped unify the whole essay.
• connector /kəˈnektə/ – Level: B1 – a word or phrase used to link ideas, such as however, therefore, or in addition – Example: She used too many connectors, which made the writing feel forced and unnatural.
• logical flow /ˈlɒdʒɪkəl fləʊ/ – Level: B2 – the smooth and sensible progression of ideas through a piece of writing – Example: The report had good logical flow because each recommendation followed clearly from the data.
• pronoun reference /ˈprəʊnaʊn ˈrefərəns/ – Level: B2 – the use of pronouns such as it, they, or this to refer back to a previously mentioned noun – Example: Careful pronoun reference prevents repetition and keeps sentences concise.
• mechanical /mɪˈkænɪkəl/ – Level: B2 – done without real thought or purpose, following a formula rather than genuine understanding – Example: His use of linking phrases felt mechanical rather than natural.
• spine /spaɪn/ – Level: C1 – (figurative) the central structure that holds an argument or piece of writing together – Example: Without a clear thesis, the essay had no spine and fell apart after the introduction.
• echo /ˈekəʊ/ – Level: C1 – (verb, writing) to repeat or reflect a word or idea from a previous sentence in order to create connection – Example: Echoing the key term from your topic sentence in the following sentence is a simple cohesion technique.

FAQ

Does using more linking words give me a higher cohesion score?

No, and this is one of the most persistent myths in IELTS preparation. The band descriptors reward skilful use of cohesive devices, not frequent use. Using too many connectors, especially the same ones repeatedly, is specifically noted as a weakness at Band 6. Quality over quantity is the right approach here.

How long should a body paragraph be in Task 2?

There is no fixed rule, but a well-developed paragraph typically runs between five and eight sentences. That is enough room for a topic sentence, explanation, an example, and a link to your overall argument. Shorter than that, and you have probably not developed the idea. Longer, and you may have lost focus or crammed in a second idea that deserves its own paragraph.

Can I improve coherence and cohesion without a teacher?

You can improve it through careful self-editing, using the audit technique above. Reading your own work aloud is also genuinely useful because your ear often catches flow problems your eye misses. That said, the fastest improvements tend to come from having someone read your writing and tell you specifically where they lost the thread. That kind of targeted feedback, on real writing tasks, is what the daily coaching sessions at richardg.xyz are built around. For more details, click here.