A recommendation letter is a written statement of support for a candidate applying for a job, academic program, scholarship, or other opportunity. It is presented in business letter format and written by someone who knows the candidate in a professional or academic capacity. A strong recommendation letter runs 300 to 500 words, follows a 5-part structure, and uses specific examples and measurable outcomes to support each claim made about the candidate.
What Is a Recommendation Letter?
A recommendation letter is a formal document that provides firsthand evidence of a candidate’s skills, achievements, and character to an evaluating authority.
According to Quillbot, a recommendation letter requires the writer to know the candidate well in a capacity relevant to the application and to offer genuine, firsthand insights into their achievements, qualities, skills, and knowledge. A vague or generic letter actively hurts a candidate’s application.
Alternative terms for recommendation letter include letter of reference, reference letter, letter of referral, and referral letter. All 4 terms refer to the same document type.
Recommendation letters serve 3 application contexts:
- Academic applications: graduate school, undergraduate admission, scholarship, and fellowship programs
- Employment applications: job offers, promotions, and internal transfers
- Other opportunities: volunteer programs, professional certifications, and visa applications
What Are the 5 Parts of a Recommendation Letter?
A recommendation letter has 5 parts: header, introduction, body paragraphs, comparison statement, and closing endorsement.
| Part | Length | Content | |—|—|—| | Header | 4 to 6 lines | Writer’s name, title, organization, date, and recipient details | | Introduction | 2 to 3 sentences | Relationship to candidate, context, and duration | | Body paragraphs | 2 to 3 paragraphs | Specific examples tied to skills, achievements, and qualities | | Comparison statement | 1 to 2 sentences | Positions the candidate relative to peers | | Closing endorsement | 2 to 3 sentences | Clear recommendation, contact offer, and signature |
According to Resume Genius, paragraphs in a recommendation letter run 3 to 5 sentences each. Margins of 1 inch to 1.5 inches are standard. The letter is proofread before sending to eliminate spelling, grammar, and formatting errors.
How Do You Write the Introduction of a Recommendation Letter?
The introduction of a recommendation letter states the writer’s relationship to the candidate, the context in which they worked together, and the duration of that relationship.
The introduction answers 3 questions:
- Who is the writer and what is their role?
- How do they know the candidate?
- For how long have they known the candidate?
A standard introduction reads as follows: I am pleased to recommend [Name], who worked under my supervision as [position] at [organization] for [X years/months].
The introduction does not begin with “I.” According to Microsoft Word’s professional writing guidance, a good recommendation letter opens with a short introduction of the recommender’s role and relationship to the candidate. Starting with the candidate’s name or a statement about the opportunity reads more smoothly than leading with the writer’s name.
How Do You Write the Body of a Recommendation Letter?
The body of a recommendation letter presents 2 to 3 specific qualities, each supported by a concrete example and, where possible, a measurable outcome.
According to Microsoft, recommenders agree on 2 to 3 qualities the candidate wants to emphasize, such as leadership, technical skill, research ability, or reliability under pressure, and then identify specific moments where those strengths showed up, like a launch, a result, a piece of work, or a measurable outcome.
Vague statements weaken recommendation letters. Specific statements strengthen them.
Examples of the difference:
| Vague | Specific | |—|—| | She is a hard worker | She completed the 6-month project in 4 months without reducing output quality | | He has strong communication skills | He led weekly briefings for a 12-person team and produced all client-facing reports for 2 years | | She is very reliable | She had a 100% attendance record across 18 months and met every deadline assigned |
Each body paragraph covers 1 quality. The paragraph opens with a statement of the quality, provides the specific example, and closes with the outcome or impact.
What Types of Achievements Strengthen a Recommendation Letter?
5 categories of achievement strengthen recommendation letter body paragraphs.
These are:
- Academic performance: class rank, GPA, research contributions, or awards
- Leadership: teams managed, projects led, or decisions made independently
- Technical skills: tools used, systems built, or problems solved
- Character and work ethic: attendance, reliability, initiative, or collaboration
- Measurable results: revenue generated, costs reduced, processes improved, or timelines met
According to Resumeway, a student who ranked in the top 5% of their class and led an independent research project that earned top honors at a regional science fair provides the reader with 2 specific, verifiable data points in 1 sentence. Generalities require no verification and carry less persuasive weight.
How Do You Write a Comparison Statement in a Recommendation Letter?
A comparison statement positions the candidate against others the writer has evaluated in similar contexts, giving the evaluating authority a benchmark.
Examples of effective comparison statements:
- In 12 years of teaching, this student ranks among the top 3 I have recommended for graduate study
- Of the 40 analysts I have managed over 8 years, she demonstrated the strongest independent judgment in her first year
- He is the most reliable project coordinator I have worked with across 6 international assignments
According to MSI Certified, a comparison statement helps the reader understand the candidate’s unique qualities and why they stand out. It converts a subjective endorsement into a relative ranking that evaluators can use.
How Do You Write the Closing of a Recommendation Letter?
The closing of a recommendation letter restates the endorsement, summarizes the candidate’s strongest quality in 1 sentence, and offers the writer’s contact details for follow-up.
A standard closing reads as follows: I recommend [Name] without reservation for [program or position]. [He/She] brings [specific quality] that will add value to your [team/program]. Please contact me at [email] or [phone] if you have questions.
The closing does not introduce new information. It reinforces the letter’s central argument and gives the evaluating authority a direct channel to verify the recommendation.
What Are the Most Common Recommendation Letter Mistakes?
The 5 most common recommendation letter mistakes are vague language, excessive length, missing contact details, generic content, and mismatched tone.
| Mistake | Why It Fails | Fix | |—|—|—| | Vague language | Provides no evidence; easy to dismiss | Replace every claim with a specific example | | Exceeding 1 page | Dilutes the strongest points | Keep the letter to 300 to 500 words | | Missing contact details | Prevents follow-up verification | Include email and phone in the closing | | Generic content | Signals the writer does not know the candidate | Tailor every example to the specific application | | Mismatched tone | Academic letters require formal language; informal ones read as unprofessional | Match tone to the evaluating authority |
A weak recommendation letter hurts a candidate’s application. According to Resumeway, a vague or generic letter can actively reduce a candidate’s chances compared to other applicants who submitted stronger references. Evaluators read dozens of letters. Specificity and measurable evidence differentiate strong letters from standard ones.
How Long Is a Recommendation Letter?
A recommendation letter runs between 300 and 500 words, fitting on 1 page with standard formatting.
PhD program and fellowship applications sometimes accept letters of up to 2 pages when additional academic context is required. Most job and undergraduate applications expect a single page.
The header occupies 4 to 6 lines. Body paragraphs run 3 to 5 sentences each. Margins are set at 1 inch to 1.5 inches. Font size is 11 or 12 points in a standard typeface such as Times New Roman, Arial, or Calibri.
How Should You Request a Recommendation Letter?
A recommendation letter request is submitted at least 2 to 3 weeks before the application deadline, in writing, with all supporting documents attached.
The request includes 4 elements:
- The specific opportunity being applied for (job title, program name, or scholarship)
- The application deadline
- A copy of the applicant’s resume or CV
- A brief note on the 2 to 3 qualities the applicant hopes the letter will highlight
According to The Hire Arc, requesting early gives the writer sufficient time to produce a considered letter. A request sent less than 1 week before the deadline produces a rushed letter and reduces the quality of the endorsement.
For another writing guide, see How to Write a Job Application Letter: 7-Step Guide with Template.
