IELTS Writing Task 1 Letter Punctuation and Formatting Checker Guide

Here's the thing: most students lose 2 to 4 band points on IELTS Task 1 letters not because their ideas are weak, but because their punctuation and formatting look sloppy. You might have perfect grammar and clear structure, yet still drop from Band 7 to Band 6 because of careless capitalization or misplaced commas.

IELTS examiners don't dock you for the occasional typo, but they absolutely notice when your letter format breaks basic conventions. This guide shows you exactly what examiners are looking for—and more importantly, how to catch your own mistakes before you hit submit. Use our free IELTS writing checker to get instant feedback on your letter punctuation and formatting.

Why Punctuation and Formatting Tank Your IELTS Band Score

Let me be direct: Task 1 letters are graded on four criteria, and one of them is Coherence and Cohesion. Proper punctuation affects readability, which directly affects how the examiner perceives your clarity. A letter with random capitalization or run-on sentences feels disorganized, even if your content is solid.

Aiming for Band 7 or higher? The band descriptors for that level expect you to organize information clearly and use a range of cohesive devices appropriately. Punctuation is part of that formula. A Band 6 response might have occasional lapses in punctuation that don't seriously impede communication. A Band 7 response uses punctuation consistently and correctly.

In short: careless punctuation holds you back. Correct punctuation pushes you up.

Standard IELTS Letter Formatting: What Examiners Expect

IELTS Task 1 letter formatting follows a strict convention—and that's good news. It means there's a clear checklist you can follow without guessing.

• Your address goes at the top left (optional for semi-formal letters, expected for formal ones).
• The date goes below your address, or at the top if you skip your address.
• A line break, then the recipient's address (for formal letters) on the left.
• A line break, then the salutation (Dear Sir/Madam, Dear Mr. Smith, etc.).
• A line break, then your body paragraphs.
• A line break, then your closing (Yours faithfully, Yours sincerely, Best regards).
• Your name typed below (and a handwritten signature above it if applicable).

Each section needs proper line spacing. You're not cramming everything together. This whitespace makes your letter easier to read and signals to the examiner that you understand formal letter conventions.

Letter Capitalization and Punctuation Mistakes to Avoid

Capitalization errors are sneaky. You'll get it right most of the time, then slip up in the same predictable places. And those slips cost you marks.

Lock down these rules:

• Always capitalize the first word of a sentence.
• Always capitalize "I" as a pronoun (even in the middle of a sentence).
• Capitalize proper nouns: names of people, places, organizations, months, days. Avoid naming specific people unless the prompt requires it.
• Capitalize the first word after a colon only if what follows is a complete sentence or a proper noun.
• Don't capitalize the first letter after a semicolon unless it's a proper noun or the start of a new sentence.
• Titles and roles are capitalized only when they precede a name or stand alone as formal titles.

See the difference? When "manager" is used as a greeting, it's capitalized in the salutation (British English). But "application" isn't capitalized mid-sentence just because it's important. That's a common mistake students make.

How to Fix Run-On Sentences in IELTS Letters

Run-on sentences are the number one punctuation killer in IELTS Task 1. You join two independent clauses with just a comma, creating what's called a comma splice. When an examiner reads a comma splice, they immediately think your sentence control is weak.

You've got four legal ways to join two independent clauses:

1. Use a period (make them two sentences).
2. Use a semicolon (shows they're closely related).
3. Use a comma plus a coordinating conjunction (and, but, or, nor, so, yet, for).
4. Use a subordinating word (because, although, while, since, if, etc.) to make one clause dependent.

All four versions work. The semicolon and period versions feel most formal. Use whichever fits your tone, but commit to one structure and stick with it.

Apostrophes and Contractions in Formal IELTS Letters

Here's a myth you need to forget: formal IELTS letters should never use contractions. That's not quite right.

Contractions like "can't," "don't," "I'm," "you've," and "isn't" are technically informal. In a highly formal letter to a government official or university, it's safer to write out "cannot," "do not," and "am." But in a semi-formal letter to a company or individual, contractions are fine and actually sound more natural.

Examiners won't penalize you for using contractions if the situation is semi-formal. They will notice if you use them in a letter where they're clearly out of place. When in doubt, avoid them.

Possessive apostrophes are non-negotiable. "It's" means "it is." "Its" is possessive. "Your" is possessive. "You're" means "you are." These aren't style choices. They're rules, and examiners notice when you slip up.

Punctuation Within Paragraphs: Lists, Transitions, and Clarity

Your Task 1 letter probably includes a list somewhere. Maybe you're listing reasons, dates, or issues. The punctuation here matters more than you'd think.

When you use a colon to introduce a list, you have three formatting options:

1. As a series within the sentence, separated by commas or semicolons.
2. As a bulleted or numbered list on separate lines.
3. As separate sentences, each on its own line.

Transition words need punctuation too. Words like "however," "furthermore," "in addition," and "on the other hand" are conjunctive adverbs. When they appear in the middle of a clause (not at the start of a sentence), use a semicolon before and a comma after.

When they start a new sentence, use a period before and a comma after.

Formal Letter Punctuation Rules: Salutations and Closings

The salutation is your opening greeting. The closing is your sign-off. Both have strict punctuation rules in formal English, and this is where many students slip up.

In British English (which IELTS follows), the salutation takes a comma after the name or title. "Dear Sir," or "Dear Mrs. Chen," both get a comma. The same rule applies to the closing: "Yours faithfully," or "Best regards," both end with a comma before your name.

One more rule: if you don't know the recipient's name, use "Yours faithfully." If you do know their name, use "Yours sincerely." This is the British convention, and IELTS examiners expect it.

Common Punctuation Mistakes That Cost Band Points

Let's walk through the errors you're most likely to make and how to fix them.

Missing commas in addresses: Addresses don't use commas between sections. "Bristol BS1 2AB" goes on its own line, not "Bristol, BS1 2AB" inline. Dates in British format don't need commas either: "5 July 2026" is correct as written.

Exclamation marks in formal letters: Avoid them. They're too casual. Even if you're excited or frustrated, stick with periods.

Double punctuation: "Really?!" is too informal. Pick one. Either "Really?" or "Really!" The same applies to "What!!!" or "...." Use only one punctuation mark at the end of a sentence.

Quotation marks without proper punctuation: If you include a quote, the comma or period goes inside the closing quotation mark in British English. Example: "The manager said, 'We'll review your request,' and then left the room." Notice the comma sits inside the closing quotation mark.

Self-Check Before Submitting: IELTS Letter Punctuation Checklist

Don't trust spell-check alone. It misses punctuation errors. Run through this checklist instead.

• Does my salutation have a comma after the name or title?
• Does my closing have a comma after the phrase?
• Do all sentences start with a capital letter?
• Did I use "I" (capitalized) every single time?
• Are there any comma splices joining two independent clauses?
• Did I spell possessive words correctly (its/it's, your/you're)?
• If I used a colon, does it introduce a complete thought or list?
• Are my dates, addresses, and proper nouns capitalized correctly?
• Did I avoid exclamation marks or multiple punctuation?
• Are there clear line breaks between sections (address, date, recipient, salutation, body, closing)?

This won't catch everything, but it covers about 80% of the punctuation errors that actually show up in Task 1 letters. For a complete review of your letter punctuation, formatting, and tone all at once, use our IELTS writing checker. It flags punctuation errors and estimates how they affect your band score.