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Cover Letter Guides

How to write cover letters that complement your resume and strengthen your application — from structure and formatting to what to include and common mistakes.

A strong cover letter can set you apart from candidates with similar resumes. These guides cover how to structure a cover letter, what to include, how long it should be, and the mistakes that get applications rejected. Whether you're writing your first cover letter or refining your approach, start with the complete guide below.

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How to Write a Cover Letter That Gets Interviews (2026)

Learn how to write a cover letter that complements your resume, shows employers why you're the right fit, and gets you more interviews.

Frequently Asked Questions

Do I need a cover letter in 2026?
Yes, in most cases. Even when a job posting lists the cover letter as optional, submitting one shows initiative and gives you a chance to explain why you're a strong fit beyond what your resume shows. The UC Berkeley Career Center recommends always including one.
How long should a cover letter be?
A cover letter should be one page maximum, typically 150-400 words or 3-4 paragraphs. MIT's career advisors recommend a font size between 10-12 points. Keep it focused — every sentence should either show why you're qualified or why you're interested in this specific role.
What is the difference between a cover letter and a resume?
A resume is a structured list of your qualifications, experience, and skills. A cover letter is a narrative that explains why you're applying, what makes you a strong fit for this specific role, and what you can bring to the company. They complement each other — the resume shows what you've done, the cover letter explains why it matters.
Can AI write my cover letter?
AI can help draft a cover letter and overcome writer's block, but you should always customize the output. Generic AI-generated cover letters are easy for recruiters to spot. Use AI as a starting point, then add specific details about the company, role, and your relevant experience that only you would know.

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