IELTS Letter Format Checker: Stop Making These Structure Mistakes

You're 20 minutes into your IELTS Writing Task 1. You've got a letter to write, and you're staring at a blank page. Most students dive straight into the body and hope the format works itself out. It doesn't. Examiners spot a poorly formatted letter in seconds, and it costs you marks in Task Response and Coherence & Cohesion.

Here's what matters: letter format isn't just about looking neat. It's about proving you understand professional communication. When you get the structure wrong, examiners assume you don't know the difference between a formal complaint and a casual message to a friend. That assumption tanks your score.

This is where an IELTS writing checker becomes invaluable. Before you submit, run your letter through our free IELTS writing checker to spot format errors instantly. But first, let me walk you through the exact structure that separates band 7 letters from band 5 ones, plus the five specific mistakes I see students repeat over and over.

What Is the Correct IELTS Letter Format? Official Structure Examiners Expect

The IELTS General Training task expects 150 words minimum in 20 minutes. Structure matters more than hitting word count, and most people get it backward.

A proper IELTS formal letter needs these five parts in this exact order:

1. Sender's address (top left)
2. Date (below the address)
3. Recipient's address (left side)
4. Salutation (Dear...)
5. Body (intro, main points, closing request)
6. Sign-off (Yours...) and name

That's it. Clean. Linear. Professional.

See the spacing? The alignment? The consistent margins? That's not decoration. That's professional communication. Examiners see this and immediately think: "This person understands formal writing."

Mistake #1: Mismatched Salutations and Sign-Offs (This Costs You More Than You'd Think)

Your salutation and sign-off must match. This is non-negotiable.

If you write "Dear Sir or Madam," you close with "Yours faithfully." If you write "Dear Mr. Khan," you close with "Yours sincerely." Use "Dear Sir or Madam" when you don't know the recipient's name. Use the person's surname when you do.

Mismatched salutations break coherence. You lose marks in both Task Response and Coherence & Cohesion. The band descriptor says you should "organize information coherently," and this is part of that.

Mistake #2: Missing or Incomplete Addresses

Your address goes in the top left. The recipient's address goes on the left side, after the date. No exceptions.

Skip this, and the examiner assumes you don't understand professional correspondence conventions. That's a direct Task Response hit, because you're not demonstrating knowledge of formal letter structure.

The recipient's address matters just as much. If you're writing to a company or institution, include the organization name, street address, city, and postal code. Don't skip any part.

Mistake #3: Burying Your Purpose in a Weak Opening

Your opening paragraph has one job: state why you're writing. Not in the next sentence. Right now.

Most students write something like "I hope you are well. I am writing regarding a matter that has been on my mind." That's wasted space. You've got 20 minutes and 150 words minimum. Every sentence must earn its place.

The strong version gets straight to the point. Examiners reward this in the Task Response descriptor: "writes clearly about the purpose and context of the letter." The weak one is bloated and says almost nothing.

Mistake #4: Rambling Paragraph Structure That Kills Coherence

A formal letter body should have 2-4 main paragraphs, each with one central idea.

Your structure should be: Opening (state purpose) > Body paragraphs (develop your reason with specific details) > Closing (state what you want to happen). No tangents. No second thoughts crammed in.

Band 7 Coherence & Cohesion explicitly says: "uses paragraphing to structure the letter clearly." Rambling paragraphs cap you at Band 5-6. Logical paragraphing is non-negotiable.

Mistake #5: Weak Closings That Don't Ask for Anything

Your final paragraph must make a clear request or state what you expect to happen. Most students go soft here.

Weak = polite but passive. Good = assertive and specific. The Band 7-8 Task Response descriptor values "fully addresses all parts of the task." A clear closing is part of that.

How to Identify Formal vs. Informal vs. Semi-Formal Letters

IELTS General Training gives you three letter types, and format changes depending on which one you're writing.

A formal letter (complaint, job application, request to an institution) uses "Dear Sir or Madam" and "Yours faithfully." It has full addresses and formal closings. An informal letter (to a friend, relative) uses "Dear John" and "Best wishes" or "Yours," with no formal address block required.

The prompt always tells you who you're writing to. Read it carefully. If it says "write to a hotel manager," it's formal. If it says "write to a friend you haven't seen in years," it's informal. Using the wrong format is a Task Response error worth 2-4 band points.

If you're stuck, our IELTS essay checker can identify letter tone in seconds and flag format mismatches before you submit.

Your Pre-Submission Format Checklist for IELTS Letters

You've written your letter. You've got 2 minutes left. Run through this checklist in order:

1. Do you have your address and the date at the top?
2. Do you have the recipient's address?
3. Is your salutation matched to your sign-off? (Sir/Madam > Yours faithfully. Name > Yours sincerely)
4. Is each paragraph focused on one idea?
5. Does your final paragraph include a specific request or outcome?
6. Did you sign your name in full below the closing?

Answer yes to all six, and your format is sound. Now you can focus on grammar, vocabulary, and task completion.

Use this checklist every single time. After 2-3 practice letters, it becomes automatic, and you'll stop making these formal letter mistakes entirely. You can also paste your letter into our IELTS writing checker to get instant feedback on structure, grammar, and band score prediction.

Beyond format, grammar and tone also trip students up. If you want detailed feedback on grammar errors in Task 1, there's a breakdown of how common mistakes affect your band score.