Formal letter writing is one of the most common directed writing tasks in IGCSE English Language — and one of the most penalised when students get the conventions wrong. The good news: the conventions are entirely learnable, and following them correctly earns marks before you’ve even written a sentence of content.
The Layout
A formal letter has a specific layout that signals immediately to the examiner that you know what you’re doing:
- Your address (top right, or top left — conventions vary, but be consistent)
- The date below your address
- The recipient’s name and address (left-aligned, below the date)
- Salutation: “Dear Mr Smith,” or “Dear Sir/Madam,” if you don’t know the name
- Body paragraphs
- Sign-off: “Yours sincerely,” if you used a name; “Yours faithfully,” if you used Sir/Madam
- Your name (printed below the sign-off)
The “sincerely/faithfully” rule trips up many students. Remember it this way: if you know their name, you’re being sincere. If you don’t know their name (Sir/Madam), you’re being faithful to the form.
Tone and Register
A formal letter is not the place for contractions (don’t → do not), slang, exclamation marks, or casual phrasing. The tone should be measured, polite, and direct — even if the letter is a complaint.
This doesn’t mean stiff or robotic. The best formal letters have a clear, confident voice — they just channel it through formal structures. Read quality business correspondence or formal op-eds to develop a feel for this register.
Structure: Purpose First
Open your letter by stating its purpose clearly in the first paragraph. Don’t warm up with pleasantries — get to the point. “I am writing to express my concern regarding…” or “I am writing to apply for…” tells the reader immediately what this letter is about.
Each subsequent paragraph should address one aspect of your purpose: background information, your specific points or requests, any relevant evidence, and what you’d like the recipient to do next.
Close by summarising your main request or point, and thanking the recipient for their time. One sentence each is sufficient — don’t over-extend the ending.
Common Mistakes to Avoid
- Using “Yours sincerely” with “Dear Sir/Madam” — this loses marks
- Forgetting the address and date entirely
- Using an informal, conversational tone throughout
- Making the letter too short — you need enough content to demonstrate range and vocabulary
- Not reading the task carefully: if the task says write to a headteacher, the register should reflect that recipient specifically
A Quick Template
47 Thornbury Road
London
SE4 2PQ
22 July 2026
The Headteacher
Ashfield Secondary School
School Lane
London SE5 1AB
Dear Ms Harrison,
[Opening paragraph: state your purpose clearly]
[Second paragraph: develop your main point with detail/evidence]
[Third paragraph: additional point or elaboration]
[Closing paragraph: restate your request/purpose and thank them]
Yours sincerely,
[Your full name]
Formal letter writing is covered in depth as part of the Thorogood English IGCSE English Language programme — along with reports, speeches, articles, and all other directed writing forms. Join the waiting list for January 2027.