MBA recommendation letters are the only part of your application written by someone else, and the rules have shifted: 7 of the 12 top programs in the table below now ask for just one letter in the 2026–27 cycle.
So your choice of recommender, and how you prepare them, matters more. A manager with a vague sense of your work writes a vague letter.
Below: how many letters each school requires, whom to ask, when, how to help without crossing ethical lines, and five email templates.
Requirements vary and are shrinking: Wharton went from two letters to one starting with the 2025–26 cycle. Recommendations are one piece of every part of the MBA application, and each school’s instructions are the final word.
| School | Letters (2026–27) | Preferred writer | Question format |
|---|---|---|---|
| Harvard Business School | 2 | Current or former supervisor | School’s own questions |
| Stanford GSB | 2 | Current direct supervisor + one more | Grid + questions |
| Wharton | 1 | Current or former supervisor | GMAC Common LOR |
| Chicago Booth | 1 | Supervisor, current preferred | School’s own questions |
| Northwestern Kellogg | 2 | Current supervisor + a former one or client | School’s own questions (3) |
| Columbia Business School | 1 | Ideally current supervisor | School’s own questions |
| MIT Sloan | 1 (max 1) | Manager or supervisor; org chart required | School’s own questions |
| Dartmouth Tuck | 2 | Current direct supervisor | GMAC Common LOR |
| Berkeley Haas | 2 (max 2) | One from your current employer | GMAC Common LOR |
| Duke Fuqua | 1 | Most recent professional setting | GMAC-style questions |
| Michigan Ross | 1 | Current or former supervisor | GMAC Common LOR |
| UVA Darden | 1 (optional 2nd) | Recent supervisor | Grid + short answers |
Yale SOM and UCLA Anderson also require two; NYU Stern (an “EQ Endorsement”), Cornell Johnson, and McCombs require one. Two takeaways:
The GMAC Common Letter of Recommendation has two parts.
A Leadership Assessment Grid rates you on 12 competencies in five groups: Achievement (Initiative; Results Orientation), Influence (Communication, Professional Impression & Poise; Influence and Collaboration), People (Respect for Others; Team Leadership; Developing Others), Personal Qualities (Trustworthiness/Integrity; Adaptability/Resilience; Self-Awareness), and Cognitive Abilities (Problem Solving; Strategic Orientation). An overall peer rating follows, from “below average” up to “the best encountered in my career.”
Then four questions:
Strong letters run on specific examples and a real piece of feedback, which is why a manager who watches you work beats an executive who barely knows you. MIT Sloan adds an organizational chart of no more than two pages, with your role circled in red and your recommender highlighted if they appear on it.
Avoid three groups. Family members: Stanford doesn’t allow them, MIT Sloan doesn’t accept them, and Haas, Fuqua, Tuck, Anderson, and Stern steer applicants away. If you’re applying from a family business, ask a client or other outside party instead, as Booth and Yale SOM suggest. Professors, for most applicants: Tuck and Anderson discourage them, and Fuqua notes academic letters largely repeat your transcript. People who report to you: Stanford bars current and former direct reports, and Haas calls them inappropriate.
College seniors applying for deferred admission can often use internship supervisors or faculty; check the program’s rules. Veterans can turn to commanding officers, and founders to clients or investors.
Count back from your first deadline, with the first conversation about six months out. These steps fit inside a full MBA application timeline.
| Before your first deadline | What to do |
|---|---|
| 6+ months | Shortlist recommenders; reconnect with former ones |
| 4–6 months | Ask in person or by video call, then send Template 1 |
| 3–4 months | Send the briefing packet (Template 2); meet to discuss it |
| 1–3 months | Register recommenders in each school’s portal; send Template 3 |
| 2 weeks, then 3–5 days before | Friendly reminders (Template 4) |
| After submission, and after decisions | Thank-you and update (Template 5) |
Letters are due by the round deadline unless a school says otherwise; MIT Sloan, Stanford, and Anderson say so explicitly, and at Tuck a missing letter moves your application to the next round.
Two schools give a cushion: HBS extends a 48-hour grace period to recommenders only, and Haas lets recommenders submit “a few days after the deadline” if your application and fee are in on time. Don’t plan around them.
If a recommender says “just write it and I’ll sign,” decline politely and offer a longer briefing call instead.
Adapt these to your voice; make the ask itself in person or on a call first.
Who/when: your current (or former) supervisor, 4–6 months out, right after you’ve raised it in conversation.
Subject: Thank you, and the MBA recommendation we discussed
Hi [Name],
Thank you for taking the time to talk today. As I mentioned, I’m applying to MBA programs this year because [why now], and afterward I plan to [post-MBA goal].
Would you feel comfortable writing a strong recommendation for me? The time involved: a short description of how we’ve worked together, two answers of up to about 500 words, and a competency rating grid, all through each school’s portal. The questions are similar or identical across schools, so much of the writing carries over.
I’m applying to [number] schools, and the earliest deadline is [Date]. If you’re willing, I’ll send a briefing packet with deadlines, questions, and project reminders. The schools require the letter to be written by you alone, so it’s background only.
If the timing doesn’t work, I completely understand. I’d also appreciate keeping this between us for now.
Thank you,
[Your name]
For a former supervisor you haven’t spoken with in a while, add a sentence on your current role.
Who/when: each recommender who said yes, 3–4 months out. Pull dates from a list of 2026–27 MBA application deadlines, and attach an MBA-ready resume.
Subject: Briefing packet for my MBA recommendations
Hi [Name],
Thank you again for agreeing to recommend me. Everything is below, and my resume is attached.
Schools, deadlines, and forms
- [School 1]: [Round], due [Date], [GMAC Common LOR / school’s own questions]
- [School 2]: [Round], due [Date], [GMAC Common LOR / school’s own questions]
Why an MBA: [Two sentences on your goal and why now.]
Projects you saw firsthand
- [Project], [dates]: my role was [role]; the result was [measurable result]
- [Project], [dates]: [role]; [result]
Feedback: In [month/year] you told me [feedback]. Since then I’ve [what you changed].
Your perspective on my [analytical skills / leadership of a team] would help most. The schools require that the letter be written by you alone, so this is only background you might find useful.
Could we meet for 20–30 minutes to walk through it? Portal invitations will arrive by email from each school.
Best,
[Your name]
Settle a clear post-MBA goal before you send it, and keep it consistent with your essays.
Who/when: all recommenders, the day you register them (1–3 months out).
Subject: MBA recommendation links just sent: [School names]
Hi [Name],
I’ve registered you as a recommender for [School 1], due [Date], and [School 2], due [Date]. The invitations come from each school’s application system, not from me, so please check your spam folder if you don’t see them.
If possible, please submit from your work email, since some schools use it to confirm your identity. Each school needs its own submission, even when the questions match.
Thanks so much,
[Your name]
Who/when: recommenders who haven’t submitted, two weeks out and again 3–5 days before. Ask first whether they’d rather have a text or a call.
Subject: Quick reminder: [School] recommendation due [Date]
Hi [Name],
I know how busy things are, so this is just a quick note: the recommendation for [School] is due [Date] at [time and time zone].
If the portal link has gotten buried, I’m happy to resend it or answer questions. Thank you again for doing this.
Best,
[Your name]
Who/when: all recommenders, right after they submit, and again when decisions come out.
Subject: Thank you, and an update on my MBA applications
Hi [Name],
Thank you for the time you put into recommending me across [number] schools, on top of a full workload.
Here’s how things turned out: [outcomes]. I’ve decided to enroll at [School] this fall, and your support was a real part of getting here.
If I can ever return the favor, let me know. I’d love to stay in touch.
With thanks,
[Your name]
A handwritten note after decisions closes the loop.
Start the first conversation early and the rest becomes routine.
