When you need a letter
If the portal asks for one, write one. If the office still reads them, write one. If a referrer asks for a PDF they can forward, write one. If the firm says the letter is optional and your resume already carries the office proof, spend the hour on cases.
A letter cannot rescue a soft resume. Grade the page first.
250–350 words. No fourth paragraph. No 'I am uniquely passionate.' No quote from the values page.
The only structure that works
- Paragraph 1. The ask and the office. Role, office, one proof you actually know the place.
- Paragraph 2. Why consulting, why this firm. One story with a number. One distinctive fact that is not prestige or people.
- Paragraph 3. Why you, and a close. One result they could put on a study. Ask for 15 minutes, or say you will follow the portal. Stop.
| Question they are asking | What belongs in the letter | What does not |
|---|---|---|
| Why this office? | A city, sector, language, or staffing fact you already lived | 'I want New York because it is the centre of business' |
| Why this firm? | A study, an office habit, a staffing model you can point to | 'Your people are the smartest in the room' |
| Why you? | One stealable result | Three resume bullets in prose |
Worked letter
Use this as a model, not a Mad Lib.
Dear Ms. Okonkwo, I am applying to the London office for a Business Analyst role. I spent last summer in Shoreditch working a grocery-margin project for a 40-store chain, and I want to stay in the office that actually staffs UK retail. I want consulting because I like messy P&Ls more than I like clean lab results. On that grocery project I split contribution by banner and found £1.8m sitting in a private-label SKU the client was about to delist. I want BCG because the retail work I have seen from your London teams starts from the store P&L, not a slide about omnichannel. I can do the job. I led a four-person analysis, I presented to the CFO, and the SKU stayed. I would welcome 15 minutes with someone on the UK consumer team. Sincerely, Amira Chen
Count the numbers: one office proof, one £1.8m, one outcome. Count the 'I's. That is the point.
Fill-in, if you must
Dear [Name of a real person, or Recruiting Team], I am applying to [Office] for [Role]. I want this office because [one thing you did in that city, sector, or language]. Why consulting: [one story, one number, one decision you owned]. Why [Firm]: [one distinctive proof. A study, an office, a staffing model. Not prestige]. Why me: [one result a partner would steal]. I would welcome 15 minutes with [team]. Sincerely, [Name]
If paragraph 2 has no number, it is not done.
Office line
Bad: 'I want New York because it is the centre of business.'
Better: 'I want New York because I spent two years on a midtown PE deal team and I already know which offices staff consumer diligence.'
Bad: 'I want Munich because I speak German.'
Better: 'I want Munich because I wrote my thesis on German grocers and I can do the first-round case in German if that is useful.'
Bad: 'I want London because I studied abroad in first year.'
Better: 'I want London because I ran a grocery-margin project in Shoreditch and I want the office that still staffs UK retail from the store P&L.'
Firm flavour
One distinctive line. Not a values-page quote.
- McKinsey: a problem type or office you can name, and why the PEI story you will tell matches the work.
- BCG: a study or sector habit you have actually read, tied to a number from your own work.
- Bain: results and a team you would want to be staffed on. Specific, not 'culture'.
- Strategy arm (Monitor, Strategy&, Parthenon): name the entity. A letter that says 'PwC' when the seat is Strategy& reads careless.
Cut these
- 'Ever since I was young'
- 'Your people are the smartest in the room'
- A second page
- Repeating three resume bullets in prose
- 'I am confident I would be a great fit'
- Name-dropping a coffee chat without a specific thing they said
Write-in draft
Paragraph 1 — ask and office
Role and office
Proof you know the place
Draft paragraph
Paragraph 2 — why consulting, why this firm
Story + number
Distinctive firm proof
Draft paragraph
Paragraph 3 — why you, and close
Stealable result
Ask (15 minutes or portal)
Draft paragraph
Checklist
- 250–350 words. Three paragraphs.
- One office line that is not tourism.
- One number in paragraph 2.
- Named person if you have one.
- Read it out loud. If you would be embarrassed to slide it across a dinner table, rewrite.
Then put the resume under it through the grader. A pretty letter on a soft resume still dies in the portal.