Should I write a cover letter if the posting says it's optional?

It depends on the role and how you're applying. For small companies, referrals, or roles where written communication is part of the job, write one. For high-volume ATS applications to large employers, the effort is more speculative. When in doubt, a short tailored letter takes less time than it used to, so the default leans toward yes.

Does a generic cover letter help at all?

Probably not. The ResumeGo field experiment found that tailored cover letters produced a 53% higher callback rate compared to no letter. Generic letters produced almost no measurable lift. A cover letter that reads like it could have been sent to fifty companies is barely better than sending nothing.

Do ATS systems read cover letters or just resumes?

Many enterprise ATS platforms now index cover letter content alongside resume content, which means keywords in your letter can contribute to how your application is scored. That said, the keyword match in your resume still carries more weight. Write the letter for the human reader first.

What's the single most important thing to get right in a cover letter?

Tailoring. Specifically, writing at least one sentence that could not appear in a letter sent to any other company: a reference to the product, the team, a line in the job description, or a piece of company news. That sentence is what separates a letter that works from one that gets skimmed and forgotten.

Are Cover Letters Still Necessary in 2026?

a pen sitting on top of a piece of paper — Photo by Towfiqu barbhuiya on Unsplash

The cover letter debate has two loud camps: people who say cover letters are dead, and people who say they’ve never been more important. Both are wrong, or at least, both are telling a selective version of the story. The more accurate answer is that cover letters matter in some hiring contexts and are functionally ignored in others, and understanding the difference is worth a few minutes of your time.

The data pointing against cover letters

Start with the skeptical case, because the numbers here are real. A Jobvite Job Seeker Nation survey found that only about 26% of recruiters consider cover letters important to their hiring decision. That tracks with what you’d expect at large companies running high-volume pipelines: a recruiter screening 200 applications for a mid-level role at a Fortune 500 company is moving fast, and the cover letter field often isn’t even visible in the ATS queue until they’ve already made a shortlist decision based on the resume.

The Novorésumé Hiring Landscape 2025 survey put harder numbers on this split. Recruiters (the people doing first-pass screening at larger employers) are the least likely to read cover letters, with roughly half saying they don’t bother. HR managers, who tend to be closer to final hiring decisions at smaller and mid-size organizations, are far more likely to read them: only about 23% skip cover letters entirely. The function you’re applying through, not just the company, changes the odds that your letter gets read at all.

The other problem with the conventional “always write a cover letter” advice is that it treats all cover letters as equal. They aren’t.

The data pointing for cover letters

Here’s where it gets more complicated. A ResumeGo field experiment (7,287 actual job applications, not a survey) found that applications with tailored cover letters had a 53% higher callback rate than applications with no cover letter. The key word is tailored. Generic cover letters produced almost no measurable lift. The experiment essentially proved two things at once: a well-targeted letter helps, and a boilerplate letter is a waste of the reader’s time.

The survey data from hiring managers (as opposed to recruiters) tells a similar story. A 2024 ResumeLab survey found that 83% of hiring managers say a strong cover letter can secure an interview even when the resume alone isn’t a perfect match. A separate 2024-2025 analysis found that 94% of hiring managers say cover letters still influence their interview decisions. Those are not small numbers, and they come from the people who actually make offers.

Zety’s Recruiting Preferences Report, which surveyed 753 recruiters, found that 63% want to learn about a candidate’s motivation for applying to that specific role. A resume structurally cannot communicate that. Answering “why here, why now” is the cover letter’s job, and it’s the one thing a resume can never do.

When a cover letter genuinely changes the outcome

The pattern that emerges from the data is that cover letters function as tiebreakers, not door-openers. They rarely rescue an application from a candidate who’s underqualified. They regularly make the difference when two similarly qualified candidates are sitting in the “maybe” pile and a hiring manager is deciding who to call first.

That tiebreaker role is most decisive in three situations. First, small companies where a human reads the application before any ATS filtering occurs. A 20-person startup’s operations lead is almost certainly reading your letter. Second, roles where written communication is part of the job itself: account managers, marketers, consultants, researchers, or anyone whose day involves persuading people with words. Sending a mediocre cover letter for a content strategist role is worse than sending a strong one, and a wash compared to sending none at all. Third, any application where you have something to explain that the resume can’t: a career change, a gap, a non-linear path, or an unconventional qualification that’s directly relevant.

There’s a fourth situation that’s easy to forget: when you have a referral. Naming a referral in the first line of a cover letter (“Priya on your engineering team suggested I reach out”) is the single most valuable sentence you can write. According to Zety’s data, 19% of employers specifically look for referrals in cover letters. Burying that in the third paragraph, or skipping the letter entirely, wastes the strongest signal you have.

When you can probably skip it

A cover letter matters much less, and may go entirely unread, when you’re applying through a large enterprise ATS with no internal connection, for a role that receives hundreds of applications, at a company where the job listing was aggregated across five job boards simultaneously. In these pipelines, the screening happens at the resume-keyword level first. Getting through that filter is the priority. If you have limited time, spending it sharpening the resume and tailoring it to the job description will typically do more work than writing a letter that might never be opened. See How Applicant Tracking Systems Work in 2026 for more on how those pipelines are structured.

The same logic applies to roles where the posting explicitly doesn’t ask for one and the company is known for a high-volume, metrics-driven hiring culture. You’re not being evaluated on voice or motivation. You’re being evaluated on credential match. A cover letter adds almost nothing there.

Why the calculus has shifted anyway

Here’s the part that most of these debates miss: the argument against cover letters was always partly about the cost of writing them, not just whether they were read. Spending two hours personalising a letter for a role where there’s a 40% chance a human never sees it is a bad trade. That math was roughly right five years ago.

It’s less right now. Drafting a tailored cover letter that hits the specific role, company, and job description takes a fraction of the time it used to. The floor for “good enough to help” is higher (recruiters have seen a wave of AI-generated letters and the bar for what reads as genuine has risen with it), but the floor for “good enough to submit” is also much more accessible. The cost side of the equation has changed. The benefit side hasn’t.

This doesn’t mean every application needs a letter. It means the threshold for writing one has dropped enough that the default should shift. If there’s any meaningful chance a human reads your application and the role is competitive, a short, specific, well-targeted letter is worth it. Under 350 words. One paragraph on why this role at this company. One paragraph on what you bring that’s directly relevant. A short close. That’s it. If you’re new to that structure, 5 Cover Letter Tips That Actually Get Interviews covers the mechanics.

If you want to cut the time cost down further, ApplyGen reads the job posting and drafts a tailored letter against your profile automatically. The final personalisation (the one sentence that only you can write) still takes a minute. Everything else doesn’t have to.