What the data says
Survey data from recruiters produces a consistent and slightly contradictory picture:
- Around 26% of recruiters say cover letters are important in their hiring decisions
- Around 72% of applicants include a cover letter even when it's optional
- Most ATS systems — Workday, Greenhouse, Lever — route cover letters into a secondary field that recruiters often don't open during initial screening
The practical conclusion: cover letters are rarely the deciding factor at the initial screening stage, but they can influence decisions at the shortlisting and hiring manager stages — particularly for roles where communication or writing ability matters.
When cover letters genuinely make a difference
When the job requires strong writing skills. Roles in marketing, communications, content, PR, policy, or any client-facing function where writing is core to the job. A strong cover letter IS the work sample.
When you're applying to a small company or startup. Founders and hiring managers at early-stage companies often read applications personally. A cover letter that demonstrates you understand the company's specific challenge is disproportionately valuable here.
When you're making a career pivot. If your CV doesn't obviously connect to the role, a cover letter that explains the thread — why your background translates — can prevent your application from being screened out on credentials alone.
When you're asked to explain something. Unexplained employment gaps, a non-linear career path, or a seniority mismatch. The cover letter is your best opportunity to contextualise before a recruiter assumes the worst.
When the posting explicitly requires one. Always write one. Ignoring a stated requirement signals you didn't read the posting.
When cover letters don't matter (and you can skip them)
When applying through ATS to large companies at scale. At companies that receive 500+ applications per role, the initial screen is often algorithmic or done by a recruiter in under 10 seconds. Cover letters in these contexts are rarely opened before the phone screen stage.
When the field is marked optional and your CV is strong. If your experience clearly matches the role requirements, a mediocre cover letter adds nothing. A strong CV that clearly communicates your fit is more valuable than a generic "I am excited to apply" letter.
When you're doing high-volume automated applications. Sending 50 applications with personalised cover letters is not possible at speed. The correct strategy is: automate the volume applications, write thoughtful cover letters for your top 5–10 priority roles. Tools like LoopCV handle the volume layer so your manual energy goes where it actually moves the needle.
What a good cover letter looks like in 2026
The biggest mistake: treating the cover letter as a prose summary of your CV. Recruiters already have your CV. The cover letter should do something different.
Effective format (4 short paragraphs, under 300 words):
Para 1: One specific sentence on why this company, not a generic company in this space. Show you did 10 minutes of research.
Para 2: The single strongest connection between your background and this specific role's requirements. Not a list of everything you've done — the one most relevant thing.
Para 3: One concrete example. A number, an outcome, a project — something tangible that makes the claim in para 2 credible.
Para 4: Brief close. Express genuine interest, state your availability, don't beg.
Avoid: "I am writing to express my interest in the position of..." — this signals you used a template. Avoid listing everything on your CV in paragraph form. Avoid the word "passionate."