IELTS General Training Letter Formality: How Formal Should It Really Be?

Every IELTS General Training Task 1 prompt names a relationship — a company, a landlord, a friend — and that single detail is supposed to decide your entire register before you write a word. In practice, IELTS General Training letter formality is where a lot of otherwise strong candidates lose marks they don’t know they’re losing: not because they picked the wrong register outright, but because they drifted between two registers inside the same letter. This post walks through the real grey area — the tone slips that happen mid-letter, not the obvious mismatches — using concrete examples from each of the three registers.

IELTS General Training Letter Formality: How Formal Does It Need to Be?

The honest answer: exactly as formal as the relationship the prompt names, no more and no less. IELTS General Training Task 1 uses three fixed registers, and the prompt sets which one applies. Write to a company or someone whose name you don’t know, and the letter is formal: no contractions, “Dear Sir or Madam,” and “Yours faithfully.” Write to someone you know by name but not closely — a landlord, a new colleague — and it’s semi-formal: still no contractions, but a named greeting (“Dear Mr Patel,”) and “Yours sincerely,” with a more direct body. Write to a friend or family member and it’s informal: first names, contractions, and a sign-off like “Best wishes,” or “Take care,”. Formality here isn’t a sliding scale of politeness — it’s one of three fixed settings the prompt selects before you write a word. Matching it approximately isn’t enough; examiners check register consistency from the greeting to the final line, under the Task Achievement criterion.

Why This Is Graded as Part of Task Achievement

Register isn’t a stylistic nicety — it’s one of the concrete things examiners check under Task Achievement, the first of the four official IELTS Writing criteria published jointly by the British Council, IDP: IELTS Australia, and Cambridge Assessment English. Task Achievement asks whether the response covers all three required bullet points and whether it does so in a format and tone appropriate to the situation described. A letter that answers every bullet point accurately but uses “Hey, how’s it going?” to open a letter to a company manager has not achieved the task as set, because it has misread the relationship the prompt specifies. The reverse is equally penalized: opening a letter to a close friend with “I am writing to inform you of my recent relocation” reads as a formal-register error, not a charmingly polite one. Neither slip is a grammar mistake, which is why proofreading for accuracy alone won’t catch it — register has to be checked as its own pass.

The Real Grey Area: Where Candidates Drift Mid-Letter

Most register guidance stops at “pick formal, semi-formal, or informal based on who you’re writing to” — and most candidates can do that correctly at the level of a whole letter. The marks get lost in a narrower place: consistency within a single letter, where one sentence signals one register and the next signals another. Three drift patterns show up repeatedly.

The formal letter that gets friendly by the closing bullet. A candidate opens correctly with “Dear Sir or Madam,” and maintains a controlled tone through the first two bullet points, then reaches the final bullet — often a request or a suggestion — and writes something like “I’d really appreciate it if you could sort this out soon.” The contraction (“I’d”), the informal verb (“sort out”), and the casual intensifier (“really”) all belong to a different register than the one the letter opened in. The fix isn’t complicated — “I would be grateful if you could resolve this matter promptly” — but it requires checking the last paragraph as carefully as the first, since fatigue and time pressure make the ending the most common place for formal letters to slip.

The semi-formal letter that swings fully informal. Because semi-formal letters go to someone the candidate actually knows — a landlord, a colleague, a course tutor — candidates often mentally categorize the relationship as “not a stranger” and default to informal habits: contractions, first names without a title, or a sign-off like “Cheers,” instead of “Yours sincerely,”. Semi-formal shares its grammar with formal (no contractions, no slang) and only its warmth with informal (a named greeting, more direct requests). Treating “semi-formal” as “halfway relaxed” rather than “formal grammar with a personal address” is the single most common register error General Training candidates make.

The informal letter that turns stiffly formal under pressure. Less common but just as costly: a nervous candidate writing to a friend falls back on exam-safe, memorized formal phrasing — “I am writing to inform you that I will be attending the event” — inside a letter that should read like a text message to someone they know well. This under-shoots the register just as much as the formal-letter drift over-shoots it, and it’s assessed the same way.

Formal vs Semi-Formal vs Informal, Side by Side

The clearest way to see where these registers actually diverge — and where they don’t — is a direct comparison of the concrete choices each one requires.

Two rows are worth reading closely. First, semi-formal shares its “no contractions” rule with formal, not with informal — that’s the row candidates get wrong most often. Second, “Yours sincerely,” appears for both formal and semi-formal letters when a name is given; the register difference between those two sits in the body’s directness and warmth, not in the sign-off itself.

A Quick Way to Check Your Own Letter for Drift

1. Read only your greeting and sign-off together, ignoring the body. If they don’t match the same register (a named greeting with “Yours faithfully,” for example), you have a structural error before you’ve even checked the content.
2. Search your draft for contractions. In a formal or semi-formal letter, every contraction you find — “I’m,” “don’t,” “it’s,” “I’d” — needs expanding. In an informal letter, their total absence is itself a register problem.
3. Read your final paragraph in isolation. This is where drift happens most, especially in formal letters under time pressure — check that your closing request or comment matches the tone you opened with, not a more relaxed version of it.
4. Check your sign-off against your greeting, not against how the letter “feels.” The greeting sets the register; the sign-off has to agree with it mechanically, not just in spirit.
5. If in doubt about the relationship, re-read the prompt’s exact wording. “Write to a friend” is unambiguous; “write to your local council” or “write to a company you have used” are formal by default even without the word “stranger” appearing anywhere in the prompt.

Common Myths About Letter Formality

• “Semi-formal just means being a bit less formal.” It means formal grammar with a named, more direct address — not relaxed grammar with a polite tone. This is the single most common misunderstanding covered above.
• “Being extra polite in a formal letter can’t hurt.” Over-formal phrasing directed at a friend, or excessive hedging in a formal complaint where directness is needed, both read as a tone mismatch, not as safe over-politeness.
• “The examiner mostly cares about the greeting and sign-off.” Those are the easiest slips to catch, but examiners are trained to notice register drift inside the body of the letter too, which is exactly where the grey-area mistakes above tend to hide.
• “Register only affects Task Achievement, so it’s a small part of the score.” Task Achievement is one full quarter of the Writing band score in its own right, and a clear register mismatch is one of the most visible ways to lose marks in it before content is even judged.

Where to Go for Each Register in Detail

This post focuses on the tone-consistency mistakes that happen within a letter once you’ve already identified the register. For the full mechanics of each individual register — exact openings, closings, and worked example letters — see our dedicated guides to the formal letter, the semi-formal letter, and the informal letter. If you want ready-made openings and sign-offs to adapt for all three registers side by side, our IELTS letter templates page collects them in one place.

Get Your Register Checked, Not Just Your Grammar

Register drift is hard to catch in your own writing precisely because each individual sentence usually sounds fine on its own — the problem only shows up when you compare the opening to the ending, which is easy to skip when you’re re-reading under time pressure. Our IELTS writing correction service has a qualified teacher check your actual letter against all three registers and flag exactly where your tone shifts, alongside marking against all four official Writing criteria, with a full band estimate delivered within 48 hours.