How to write a cover letter (and when you actually need one)

The cover letter is the most agonized-over document in the job search — and often the least necessary. Here’s a clear way to think about when to write one, and a simple structure that makes it fast when you do.

Do you even need one?

Sometimes yes, sometimes no. Write one when the application asks for it, when a posting says it’s “preferred,” when you’re a career changer or have a gap that deserves a sentence of context, or when you’re genuinely excited about a specific company and can say why. Skip it when the form doesn’t offer a field for it and the role is high-volume — your energy is better spent tailoring your resume. A cover letter should add something the resume can’t; if it just restates your resume, it isn’t helping.

A structure that works

• Opening (2–3 sentences). Name the role and say, specifically, why this company or team. Skip “I am writing to apply for.” Lead with something real.
• Body (1–2 short paragraphs). Pick the one or two requirements that matter most for this job and prove them with a concrete example — a result, a project, a number. Connect your experience to what they need, don’t just list it.
• Close (2 sentences). Reaffirm your interest and invite the next step. Keep it warm and brief.

The whole thing should fit on half a page. Nobody wishes your cover letter were longer.

Make it specific

A generic letter you could send to any company reads exactly like what it is. Mention the actual product, mission, or problem the role addresses, and tie it to something you’ve done. One specific, honest sentence about why this job beats three paragraphs of enthusiasm.

Match the resume it accompanies

Your cover letter and resume should tell the same story. If you’ve tailored your resume to the posting, echo the same key terms and priorities in the letter so the two reinforce each other.

The fast path

Because a good cover letter draws on the same raw material as your resume — your experience and the job description — it’s a natural thing to generate from your profile and then personalize. Job Umbrella does exactly that: tailor your resume to a job, then generate a matching cover letter from it and export it as .docx or PDF. Use the structure above to personalize the draft — it takes minutes, not an evening.