Your letter looks fine. Spelling's correct. Grammar's solid. But you're stuck at Band 6, and you can't figure out why.
Here's the thing: you're missing coherence. Not because you don't understand it, but because you're not actually checking for it before you submit. Band 7 letters don't just have good sentences. They flow. They guide the reader from one idea to the next without any mental speed bumps. That's what separates a 6 from a 7 in Coherence and Cohesion, which accounts for 25% of your writing score.
This guide teaches you exactly how to check your own letter for logical progression, spot where your flow breaks down, and fix it before test day. Whether you're using an IELTS writing checker or reviewing manually, these principles are what separates Band 6 from Band 7.
Let's be clear about what the rubric actually says. The IELTS scoring guide uses the term "Coherence and Cohesion" as one criterion. At Band 7, here's what examiners are looking for: "uses a variety of cohesive devices appropriately although there may be some under or over-use" and "information and ideas are arranged logically; progression is generally clear."
Translation: your ideas need to follow a natural order, and you need the connectors that make that order obvious to the reader. It's not enough to have good information. The reader should never have to stop and think, "Wait, why is she telling me this now?"
Most Band 6 letters fail here not because the writer lacks ideas, but because ideas appear out of order or lack bridges between them. You might write about accommodation in paragraph two, then circle back to it in paragraph four. You might jump from a complaint straight into a request without explaining the connection.
Coherence isn't one thing. It's three things working together. When you're checking your letter, look for all three.
Your letter should move through information in an order that makes logical sense to the reader. In a complaint letter, you might introduce the problem first, then explain its impact, then request action. In an inquiry letter, you might open with context, then ask your questions, then explain why you need the information.
The problem: many students write paragraphs in the order they think of them, not in the order readers need them.
Weak: "I am writing to complain about the noise from your restaurant. I would like a refund for my meal. Last Tuesday, I visited your establishment at 8 pm. The music was so loud I could not hear my companion."
Notice what's wrong? The paragraph jumps from complaint to request, then backtracks to explain the situation. The reader's thinking, "Why does she want a refund? Oh, now I understand." Band 6 material.
Good: "I am writing to complain about the noise levels at your restaurant. Last Tuesday, I visited at 8 pm, and the music was so loud I could not hear my companion. As a result, I was unable to enjoy my meal properly. I would therefore like to request a refund for this experience."
Better. The reader gets: context first, impact second, request third. That's logical progression. Band 7 territory.
Within each paragraph, sentences should connect. Use linking words and phrases, but use them intentionally. The IELTS band descriptor specifically mentions "a variety of cohesive devices." That means connectors like "however," "therefore," "as a result," "in addition," transitional phrases like "To be more specific," and reference words like "this," "these," or pronouns.
The mistake isn't using too few connectors. It's using them without logic.
Weak: "I have visited your restaurant five times. However, the service has always been excellent. I am very disappointed."
The connector "however" creates a logic problem. If service was always excellent, why use "however" before praising it? And then "I am very disappointed" appears without explanation. The reader's lost.
Good: "I have visited your restaurant five times, and on most occasions the service has been excellent. However, during my last visit, the staff forgot my order entirely. As a result, I am very disappointed."
Now the connector "however" signals a contrast that actually exists. "As a result" logically links the problem to the disappointment. Coherence achieved.
Every sentence in your letter should do one of three things: explain your situation, develop that explanation, or move you toward your purpose. If a sentence doesn't do any of those, it's filler.
Let's say you're writing to a university admissions office asking for a deadline extension. A sentence like "The university is located in a beautiful city" is irrelevant. It doesn't explain your situation, develop your request, or support your case. Delete it.
Tip: Read each sentence and ask yourself: Does this help my reader understand my situation or my request? If the answer is no, delete it. Band 7 letters are lean. No filler.
You don't need special software to check coherence. You need a system. Here's what Band 7 scorers do mentally. You can do it on paper (or screen).
Read your finished letter. Don't fix anything yet. Just extract the main idea of each paragraph. Write it down in one sentence per paragraph.
Example: You're writing a complaint letter about a delayed delivery.
Now read that outline aloud. Does the progression make sense? Or does something feel out of order? You've just diagnosed your coherence problem.
Look at the space between paragraphs. Is there a clear reason why paragraph 2 comes after paragraph 1? Is there a bridge sentence that explains the connection?
A logical jump looks like this: paragraph 1 ends with "The product was supposed to arrive on 20 June." Paragraph 2 begins with "I think your website could be improved." That's a jump. The reader's thinking, "Why are you talking about the website? What does that have to do with the delayed delivery?"
Tip: If you find a jump, add a transition sentence. It doesn't have to be long. "More importantly, this delay has affected me personally" bridges the gap and prepares the reader for the impact paragraph coming next.
Go through your letter and highlight every connector: however, therefore, in addition, as a result, although, while, because, etc. Now read each highlighted connector aloud and ask yourself: Does this word actually signal the relationship between these two ideas?
Band 6 letters often over-use "however" or repeat the same connector five times. Band 7 letters vary their connectors and choose them with precision.
Weak: "I paid 150 pounds for this item. However, it was delivered late. However, the packaging was damaged. However, customer service did not respond to my email."
Every sentence uses "however," but they don't all signal contrast. Sentences 2 and 3 are additional problems, not contrasts. This is weak, repetitive coherence. Band 5 to 6 range.
Good: "I paid 150 pounds for this item. However, it was delivered late. The packaging was also damaged upon arrival. More concerningly, customer service did not respond to my email within the promised timeframe."
Variety. Precision. Band 7 coherence.
Reading silently is a trap. You fill in gaps your brain knows are there. Read your letter aloud. When you stumble, pause, re-read, or feel confused, that's a coherence problem. Mark it and rewrite that section. Many students find that using an IELTS writing checker alongside this method helps catch flow issues they might miss.
You don't need to be a teacher to recognize these. Look for them in your own work.
You explain something in paragraph 2, then explain it again (slightly differently) in paragraph 4. The reader's already understood. You're repeating.
Example: Paragraph 2 explains that your flight was delayed. Paragraph 4 mentions "the plane didn't leave on time." Same idea. Second time is noise.
Solution: Once you've explained an idea, move forward. If you need to reference it again, do so briefly and only to build toward something new.
You use a connector, but the relationship it signals doesn't exist. "The room was clean. Therefore, I was unhappy." Therefore suggests a logical result, but there isn't one. You'd use "However" or "Nevertheless" here. If the room was clean and you were still unhappy, the reader needs to understand why.
You jump into details without setting the scene. Example: "I would like a refund." Before asking for a refund, the reader needs to know what happened. Provide context first, then consequences, then request.
Short sentences are fine. But five in a row with no connectors creates a choppy, disconnected feeling. The IELTS band descriptor values "a variety of cohesive devices." That includes sentence variety too.
Weak: "I visited the restaurant. The food was cold. The waiter was rude. I waited 30 minutes. I was very upset."
Good: "When I visited the restaurant, I encountered several problems. The food arrived cold, the waiter was dismissive when I complained, and I waited 30 minutes for service. As a result, I was very upset."
Second version combines ideas, creates flow, and shows control. Band 7 writing.
Let's apply this to actual Task 1 scenarios.
Prompt: "You had a problem with a hotel stay. Write to the hotel manager complaining about the service and requesting compensation."
Student's draft (selected paragraphs):
"I am writing to lodge a formal complaint about my stay at your hotel last month. I paid 200 pounds for a room. The room had a broken air conditioning unit. However, the staff was very professional. I would like a refund of 50 pounds."
Coherence problems identified:
Revised version:
"I am writing to lodge a formal complaint about my stay at your hotel last month. Despite paying 200 pounds for a three-night stay, the room was not in a satisfactory condition. The air conditioning unit was broken, which meant I endured sweltering heat during a particularly warm period. Although the front desk staff responded promptly to my complaint, the problem was never resolved. Consequently, I did not sleep well and missed important meetings the following day. I believe a partial refund of 50 pounds is fair compensation for this experience."
What's better:
Prompt: "You want to take an English course. Write to a language school requesting information about courses, costs, and dates."
Weak version:
"I am interested in studying English at your school. I would like to know about your courses. I am also interested in the cost. I want to know when courses start. I have studied English for five years. I am currently at the intermediate level."
Problems:
Improved version:
"I am writing to inquire about English courses at your school. I am an intermediate-level student who has been studying English for five years and am now seeking to improve my conversational skills. Could you please provide information about your current course offerings that would be suitable for this level? Additionally, I would appreciate details regarding course fees and the start dates for upcoming sessions. Thank you for your assistance."
What changed:
Print this. Keep it near you. Check every box before you finalize your letter.
If you check all ten boxes, you're in Band 7 territory for Coherence and Cohesion. Not guaranteed, but you've done the work.
Task 1 is a letter. Task 2 is an essay. Same skill (coherence), different context.
Task 1 coherence is about personal communication. You're writing to someone: a hotel manager, a friend, a language school. Your logic is conversational and direct. You explain a situation and what you want. Progression is usually chronological or cause-and-effect.
Task 2 coherence is about argumentation. You're explaining a position, supporting it with reasons, and defending it. Progression is often argument-by-argument or point-by-counterpoint. The structure in Task 2 is more rigid than in Task 1.
The techniques (logical order, varied connectors, relevant sentences) are the same. But a Task 1 letter doesn't need a topic sentence in each paragraph the way a Task 2 essay does. A Task 1 letter's paragraphs are more fluid, more conversational.
Don't assume Task 1 requires less structure. It requires different structure. A complaint letter's structure isn't the same as a discursive essay's. Know the difference.
If you want instant feedback on your letter's coherence, you can use an IELTS writing checker to analyze your work. A good writing evaluation tool will flag where your logic breaks down, show you repetitive connectors, highlight sentences that don't support your main purpose, and give you specific Band feedback on Coherence and Cohesion.
This complements manual review. Technology catches patterns you might miss; your own reading catches the nuance. Use both.
Use our free IELTS writing checker to get instant feedback on coherence, grammar, and band score. See exactly where your letter loses points and how to fix it.
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