Ask ten hiring managers whether cover letters matter and you will get ten different answers. The honest answer is: sometimes, and it depends on the company.
Here is what the data actually shows.
What the research says
A Society for Human Resource Management survey found that 26% of hiring managers always read cover letters. Another 56% say they read them when they are already interested in the candidate after reviewing the resume (SHRM).
So in practice: fewer than a third of hiring managers read cover letters as a first step. Most use the resume to make an initial call, then reach for the cover letter if they want more context.
CareerBuilder found that 49% of hiring managers say a well-written cover letter can get a borderline candidate an interview they would not otherwise receive (CareerBuilder). That same survey found that 45% of hiring managers will discard an application that does not include a cover letter when one was specifically requested.
What this means: cover letters rarely make the case on their own. But they can tip the balance when the resume leaves questions unanswered.
When cover letters matter most
Career changers. If you are pivoting industries or moving from a different function, your resume may not obviously connect your past experience to the new role. A cover letter is your opportunity to explain the connection directly. Without it, the resume alone may not make the case.
Small companies and startups. At larger companies, high application volume means recruiters rarely read cover letters unless prompted to. At smaller companies where a hiring manager is reviewing applications themselves, a cover letter can carry more weight. They are looking for fit, personality, and genuine interest, not just keyword matches.
Referrals. If someone inside the company referred you, a cover letter that mentions the referral and explains why you are interested carries extra weight. It shows you are serious enough to write something specific.
Roles that involve communication or writing. Applying for a marketing, editorial, communications, or client-facing role? The cover letter is a writing sample. Hiring managers will notice if it is generic or poorly written.
When the job posting explicitly asks for one. This one is simple. If they ask for it, send it. Forty-five percent of hiring managers will discard applications that skip it (CareerBuilder).
When cover letters are usually ignored
High-volume ATS-filtered roles at large companies. If a posting at a Fortune 500 company gets 300+ applications, the ATS filters the pile before any human reads it. A cover letter does not factor into ATS scoring. By the time a recruiter is looking at your application, they are already starting with a short list of strong resume matches. The cover letter may not even get opened.
When the application portal does not have a cover letter field. Some ATS platforms do not surface cover letters to recruiters even when candidates upload them. If there is nowhere to attach it, do not spend 30 minutes writing one.
Volume job searching. If you are applying to 50 jobs in a week, writing a genuinely tailored cover letter for each one is not realistic. In that case, prioritize tailoring your resume over writing cover letters for applications you are not genuinely excited about.
What makes a cover letter actually useful
TopResume found that 83% of hiring managers say a generic cover letter has no positive impact on their hiring decision (TopResume). The word "generic" is doing a lot of work there.
Most cover letters are generic. They open with something like "I am excited to apply for the [job title] position at [Company]." They restate the resume in paragraph form. They end with "I look forward to hearing from you."
That kind of cover letter does nothing. No one is moved by it. It neither helps nor hurts, except it cost you time to write.
What makes a cover letter useful:
- It answers a question the resume raises. ("My background is in B2C marketing, but here is why I am pursuing this B2B role.")
- It mentions something specific about the company. Not generic praise, but a real reason you are interested. ("I have followed your approach to product-led growth since reading the case study on your onboarding redesign.")
- It is short. Three paragraphs. Under 300 words. Recruiters are not reading essays.
What makes a cover letter hurt you:
- Errors in spelling or grammar. Fifty-eight percent of hiring managers say they automatically reject a resume with typos (CareerBuilder). Same applies to cover letters.
- Restating your resume. They have already seen it.
- Writing about what the job would do for your career. That is relevant to you, not them.
A concrete example
Generic opening (no value added): "I am writing to express my interest in the Senior Product Manager position at Acme Corp. With 6 years of experience in product management, I believe I would be a strong fit for this role."
Specific opening (actually useful): "I have spent 3 years building checkout flows at a Series B e-commerce company. When I saw that Acme Corp is rearchitecting its payment stack to support international markets, that specific problem immediately stood out to me. Here is why I think my experience is relevant."
The second version tells the hiring manager something the resume does not. It connects a specific piece of your background to a specific company challenge. That is worth reading. The first is not.
The practical answer to "should I write one?"
Write a cover letter when:
- The posting requests one
- You are making a career change
- You are applying at a small company or startup
- You have a specific, genuine reason to be interested that the resume does not show
- Someone referred you
Skip the cover letter (or send a very short one) when:
- The job portal does not have a field for it
- The company is very large and the role will get hundreds of applications
- You cannot write something specific and honest in under 300 words
- You are running out of time and your resume still needs tailoring
A tailored resume that matches the job description is almost always more valuable than a generic cover letter. If you only have 30 minutes to spend on an application, use it on your resume.
What Fitted does for cover letters
When you tailor a resume in Fitted, you also get a cover letter generated at the same time. It pulls from your resume and the job description to write something specific rather than generic. You review it, edit it, and decide whether to send it.
Create a free account to see the full output, including the cover letter. Or check our pricing page if you want to understand what is included.