GT Formal vs Informal Letter Openings

General Training Task 1 is a letter — and tone is often half the battle. A complaint to a hotel manager written like a text to a friend can lose Task Achievement even when every bullet is technically mentioned. Formal, semi-formal, and informal letters each expect different openings, closings, and sentence rhythm.

This guide from IELTS AI Tutor by IELTSGRADER compares tone levels, gives phrase banks for openings and closings, and shows how bullet coverage changes with register.

In this guide

1. How to identify the required tone
2. Formal letter openings and closings
3. Informal letter openings and closings
4. Semi-formal: the middle register
5. Bullet coverage by tone
6. Before and after: complaint letter opening
7. Before and after: letter to a friend
8. Try this yourself

How to identify the required tone

Read the relationship and purpose in the prompt:

Prompt signal	Likely tone
Write to a company / council / stranger	Formal
Write to a manager you do not know personally	Formal or semi-formal
Write to a colleague you know well	Semi-formal
Write to a friend or family member	Informal

Purpose words matter: complain, apply, request, enquire → usually formal. Apologise, invite, suggest meeting up → often informal or semi-formal.

When unsure, match the most formal reasonable option — polite and complete beats casual and risky.

Master checklist: GT formal letter checklist. High-band model: Band 8 complaint sample.

Formal letter openings and closings

Openings (name known vs unknown)

Situation	Opening
Name unknown	Dear Sir or Madam,
Name + title known	Dear Mr Patel, / Dear Ms Chen,
Department / role	Dear Hiring Manager, / Dear Customer Services Manager,

Avoid To whom it may concern unless the prompt feels legal — Dear Sir or Madam is standard in IELTS.

Purpose lines (first content sentence)

• I am writing to complain about…
• I am writing to request information regarding…
• I am writing to apply for the position advertised…
• I am writing to express my dissatisfaction with…

State purpose early — examiners should not hunt for why you are writing.

Closings (must match opening)

Opening type	Closing
Dear Sir or Madam	Yours faithfully,
Dear Mr/Ms + Surname	Yours sincerely,

Not formal: Best wishes, Love, Cheers, Thanks! (save for informal)

Formal language habits

• Full forms: I would appreciate not I'd love
• No slang: awesome, gonna, stuff
• Polite requests: I would be grateful if you could…
• Passive acceptable: The item was delivered damaged

Informal letter openings and closings

Openings

Relationship	Opening
Close friend	Dear Anna, / Hi Sam,
Family	Dear Mum, / Dear Uncle James,

Hi is fine for friends; avoid Hey boss unless the prompt is clearly casual work chat (rare).

Purpose lines

• How are you? I hope you're well.
• Thanks for your last letter — it was great to hear about…
• I'm writing because I wanted to tell you about…
• Sorry I haven't been in touch lately.

Conversational connectors are welcome: Anyway, By the way, Actually.

Closings

Warmth	Closing
Standard friend	Best wishes, / All the best,
Close friend	See you soon, / Take care,
Family	Love,

Sign with first name only: Anna — not Yours sincerely, Anna Smith.

Informal language habits

• Contractions: I'm, can't, we'll
• Phrasal verbs: pick up, hang out, sort out
• Direct questions: Can you let me know by Friday?

Still cover all bullets — friendly tone is not an excuse for vague answers.

Semi-formal: the middle register

Semi-formal appears when you write to someone you know in a professional context — a neighbour about noise, a colleague about a project, a landlord you have met once.

Feature	Semi-formal pattern
Opening	Dear Mr Lopez, (name known)
Tone	Polite but not stiff
Closings	Best regards, / Kind regards,
Contractions	Some (I'm writing) but not slang

Example purpose line:
I am writing to let you know about a problem with the heating in my flat, which I hope we can resolve quickly.

Not as cold as I wish to lodge a formal complaint, not as chatty as Hey, the heater's broken again.

Bullet coverage by tone

Bullets are non-negotiable at every tone — only how you develop them changes.

Bullet type	Formal development	Informal development
Explain a problem	Facts, dates, reference numbers	Story + how it affected you
Request action	Clear, polite ask + deadline	Friendly ask + offer to help
Suggest solution	I would suggest…	Maybe we could…
Give news	Neutral, complete sentences	Enthusiasm, shared context

Rule: one paragraph or clear block per bullet when possible. A single vague line per bullet is a common Task Achievement slip at every register.

Before and after: complaint letter opening

Prompt: You stayed at a hotel. The room was noisy and the heating did not work. Write to the manager. Say when you stayed, describe problems, and ask for a partial refund.

Too informal opening:
Hi there,
So I stayed at your hotel last week and honestly it was a nightmare lol. The room was super noisy and freezing.

Formal opening:
Dear Sir or Madam,
I am writing to complain about my recent stay at your hotel from 12 to 14 March, during which several issues significantly affected my comfort.

Why the formal version works: correct greeting, clear purpose, dates, professional tone — bullets can follow in order.

Before and after: letter to a friend

Prompt: A friend is visiting your city. Suggest places to visit, offer to meet, and ask when they arrive.

Too formal opening:
Dear Sir or Madam,
I am writing to provide information regarding tourist attractions in my city.

Informal opening:
Dear Chris,
Great news that you're finally coming to Bristol — I've put together a few ideas for things we could do together.

Why the informal version works: matches relationship, sounds natural, still signals bullet coverage.

Phrase bank: requests and complaints by tone

Function	Formal	Informal
Ask for information	I would be grateful if you could provide…	Could you let me know…?
Complain politely	I was disappointed to find that…	I was really annoyed that…
Suggest meeting	I would appreciate the opportunity to discuss…	Are you free on Saturday to talk about this?
Give reason	Due to unforeseen circumstances…	Something came up at work and…
Close with action	I look forward to your prompt reply.	Let me know what you think!
Apologise	I apologise for any inconvenience caused.	Sorry about that — my bad.

Use the column that matches the prompt relationship. Mixing columns — formal greeting with informal slang — is a common Task Achievement slip.

Word count and bullet depth

At 150 words minimum, each bullet deserves two to four sentences in formal letters and two to three in informal ones. One-line bullets read like notes, not letters.

Thin bullet: I want a refund.

Developed formal bullet: I would therefore appreciate a partial refund of the accommodation charge, or alternatively a complimentary night on a future stay, as compensation for the disruption.

Depth beats decorative vocabulary.

Tone mistake quick reference

Error	Fix
Yours faithfully after Dear Mr Lee	Switch to Yours sincerely
Dear friend	Use a name from the prompt or invent one (Dear Alex)
Slang in complaints	Neutral formal verbs
Essay-style In conclusion	Letter sign-off instead
Missing purpose in sentence 1–2	Add I am writing to…

Try this yourself

Prompt A (formal): You ordered a laptop online. It arrived damaged. Write to the retailer. Describe the item, explain the damage, and request a replacement.

Prompt B (informal): Write to a friend who is stressed about exams. Give advice, share what worked for you, and offer to study together.

For each prompt, write only the opening paragraph (greeting + purpose + first bullet) in 6 minutes.

1. Label tone: formal or informal.
2. Match closing you would use at the end.
3. Submit both openings in one file to the Task 1 checker or essay checker.

Frequently asked questions

What if the prompt does not give a name?

Invent a realistic name for informal letters (Dear Maria,). Use Dear Sir or Madam for formal unknown recipients.

Is semi-formal tested often?

Yes — neighbour, colleague, and landlord scenarios often sit between formal and informal. When in doubt, stay polite and clear.

Can I use bullet points in the letter?

IELTS GT letters are usually written as continuous prose paragraphs, not bullet lists — even when the prompt has bullets. Each bullet should become a developed paragraph or clear block of sentences.

Does handwriting matter for tone?

Neat handwriting or clear typing does not change tone rules, but illegible letters can obscure bullet coverage — write so every required point is easy to find.

Does GT Task 1 need an overview like Academic charts?

No. Letters need purpose, tone, and full bullet coverage — not a chart-style overview.

Are idioms good in informal letters?

Light, common phrases can work (fingers crossed). Heavy idiom chains can hurt clarity — especially under word pressure.

How long should GT Task 1 be?

At least 150 words. Many strong letters land near 170–200 with developed bullets.

Can I sign with my full name in an informal letter?

Use your first name only for friends and family (Best wishes, Anna). Full name plus Yours sincerely belongs in formal letters.

Next: run the full formal letter checklist, study a Band 8 complaint model, then check your letter.