Cover letters

Do you still need a cover letter in 2026?

Usually no. How to read the application form in fifteen seconds, what each ATS does with the file, and three cases where a letter still changes the outcome.

Jordan ReyesJordan Reyes · · 9 min read
A laptop showing an application form with an empty upload box, next to a face-down printed resume

Short answer: usually no. On most online applications in 2026 the cover letter field is optional, the file is stored rather than read by any software, and the twenty minutes you spend on it buy less than the same twenty minutes spent on the next application. The exceptions are real, though, and every one of them is identifiable from the form itself — before you write a word.

Every one of those exceptions shows up as a setting on the form. A required marker. A text box with a real question typed into it. A small req where a hiring manager, not an applicant tracking system, is doing the reading. So the skill worth having here is not writing a better letter — it is reading the form in fifteen seconds and knowing which of five things is in front of you.

Is that cover letter field required, or just sitting there?

Every field on a modern application form is a setting somebody chose. In Greenhouse, an employer adding a custom question to a job post chooses Required or Optional inside the Add Custom Question box at the moment they create it; when the same question is pushed to several jobs at once, the support documentation describes clicking the ellipsis icon next to a job and selecting required from the dropdown. Ashby works the same way. Its application forms documentation says that all form question types support making fields required, and that you turn it on by checking Required at the bottom of the question tile. Nothing on these forms is mandatory by accident.

SmartRecruiters draws the line even more starkly. Its application API states that the only required fields are firstName, lastName, email and answers, and the last of those only when the employer wrote required screening questions. A cover letter is not on that list; it travels as one of the candidate attachments, alongside the resume.

It also helps to know that "Cover Letter" is not always a built-in field. Greenhouse lets an employer add a custom application question and pick Attachment from the Answers dropdown, which produces an upload slot that looks identical to the standard one and carries its own Required flag. Same box, different plumbing — and different rules underneath, since Greenhouse documents a 500 MB ceiling on an Attachment answer against the 100 MB it documents for ordinary candidate uploads. The practical consequence is that two postings on the same careers page can treat the letter completely differently, and the only way to tell is to read that specific form.

The first thing to do with a posting, then, is look for the asterisk. A Project Manager req on a Greenhouse-hosted board that shows a Cover Letter upload with no required marker and no accompanying question is telling you, in the only language a form has, that nobody built a process around reading it.

If the field is optional and nothing else on the form asks you a question, skip the letter. That is a position, and a great deal of career advice disagrees with it, so here is the case. An optional attachment produces no field, no tag, and no rule. It is a file a recruiter may open at the point where they have already decided to open your application, which means it cannot move you from screened-out to screened-in — screening happens on the structured fields and the resume parse, both of which run before anyone clicks anything. The one thing the letter reliably costs is the half hour you did not spend on the next req.

What the software does with the file

Nothing, mostly. This is the part that surprises people who have been told an ATS "scans" everything they submit.

Workday's parser works on the resume, not the letter. The administrator guide says plainly that resume parsing populates fields from a resume, and the Recruiting course manual lists what comes out of it: personal and contact information, work experience, education and languages. On the external career site, Quick Apply populates fields on the job application from the resume, CV, or previous applications of a candidate. No step in that chain mentions a letter. Workday's own formatting guidance is worth knowing while you are there — for best results, use resumes that do not have images or image-based styles.

SystemHow the letter arrivesAccepted formatsSize limit
GreenhouseUpload field, or a custom question with an Attachment answer type.doc, .docx, .pdf, .rtf, .txt100 MB
SmartRecruitersCandidate attachment on the applicationPDF, DOC(X), RTF, JPG, PNG2 MB per file
WorkdayAttachment on the application, or carried over by "Use my last application"Not stated in the candidate documentationNot stated

There is a second Workday detail that changes where your attention should go, and Workday's own pages do not entirely agree on it. The administrator guide lists what parsing does not auto-fill: languages, skills, and any field the employer has configured as hidden. Languages, note, is on the course manual's list of what the parse extracts and on the admin guide's list of what it will not fill in for you. Two vendor pages, two answers, and no way to tell from the candidate side which one your employer's tenant behaves like. Assume the shorter list, because the field you assumed was populated and was not is exactly the field a recruiter filters on later. A Project Manager who spends the saved half hour making sure the skills section of the Workday form is filled in properly has done something a letter cannot do for them.

Those two size limits are fifty times apart, and the gap says what each vendor expects. Greenhouse allows uploads up to 100 MB, a ceiling set so high it will never bind on a document. SmartRecruiters caps files at 2 MB, which a two-page letter carrying a scanned signature can genuinely exceed. Keep the letter as text inside a PDF and you never meet either wall.

The five things that field can be, and what to do about each

What the cover letter field is telling you

Read the form before you write. The setting an employer chose is the clearest signal you get about whether anyone intends to read the answer.

What it meansWrite one?
Cover Letter, marked requiredSomeone set the field to Required on purposeYes — 150 to 250 words, specific to the req
Cover Letter, optional uploadThe default field, left switched on, no process behind itNo, unless one of the three cases below applies
A text box asking "Why this role?"A custom question an employer wrote and will read as a columnYes — answer that question, about 120 words
No cover letter field at allThe employer removed it from the formNo. There is nowhere to put it
"Additional documents" onlyA generic attachment slot, not a letter fieldOnly if you have something the resume cannot carry
Source: Greenhouse and Ashby application-form documentation

The middle row is the one that trips people up. A text box is not a smaller version of an upload field — it is a question somebody typed, which means somebody built a screen around the answers. For a Customer Success Manager req, a 500-character box asking "what is the hardest account you have saved?" will be read down a single scrolling column across every applicant. That is much closer to an interview answer than to a letter.

Who reads it, if anyone does

The people on the other side of the upload box

939,700HR specialist jobs, 2025
$75,940Median annual wage, May 2025
73,700Projected openings per year, 2025-35
Source: BLS Occupational Outlook Handbook — Human Resources Specialists, May 2025 estimates

The Bureau of Labor Statistics counts 939,700 human resources specialist jobs in 2025, at a median wage of $75,940 as of May 2025, and describes the work as recruiting, screening and interviewing job applicants. Those are the people who open attachments. Whether they open yours depends almost entirely on how far your application got on the fields that came before it — on a Customer Success Manager req with one recruiter and forty applicants, your letter is not competing against the other letters, it is competing against the next twenty minutes of that recruiter's afternoon.

Here is what the data does not say, and it matters more than anything above: no federal statistic and no vendor help page reports what share of employers require a cover letter, or what share of recruiters open the ones they receive. The BLS counts screeners. It does not watch them read. Anyone quoting you a clean percentage on this is quoting a survey of a few hundred respondents, not a measurement of the systems.

What the vendor documentation does establish is narrower and more useful. Greenhouse's automated actions — auto-tag, auto-advance and auto-reject — fire on a candidate's answers to custom job post questions, and can combine conditions across up to five of them. Auto-reject exists, in Greenhouse's own description, to help recruiters on high-volume roles filter out candidates who do not meet essential criteria like a license or a location requirement. A blank optional attachment is not a condition any of that can fire on.

Auto-advance is the mirror image, and it is the strongest practical argument for the text box over the file. Greenhouse describes it as moving a candidate directly to a later stage in the interview plan based on the answers they give to custom job post questions. An answer typed into a question can, at some employers, skip you past a screening stage. An attached document cannot, because there is no field for a rule to evaluate. Same effort, different destination — which is why the 120 words in the box are worth more than the 400 in the PDF.

The three times a letter changes the outcome

There are cases where a letter does work no other part of the application can do, and none of them have to do with enthusiasm. Each is a fact the resume cannot state on its own without looking strange.

  1. The application contradicts itself and one sentence fixes it. A Project Manager relocating to Denver whose resume still carries a Chicago address; a candidate whose last title reads Coordinator and whose next job is a clear step up. The parse will faithfully produce the confusing version, and a line resolves it.
  2. The req is small and the field is required. If the asterisk is there, someone will read it — probably a hiring manager with a shortlist rather than a recruiter with a queue. Write to that person, and reference the posting.
  3. You are changing industry and the titles do not translate. A Customer Success Manager moving from agency work into healthcare software has a resume full of accounts nobody at the new employer recognizes. The letter is where that equivalence gets made explicit, once, in plain words.

Everything outside those three — restating the resume in paragraphs, praising the company's mission, explaining that you are a fast learner and a team player — is the writing that gave cover letters their reputation in the first place.

What to write when the box is a text box

Answer the question, not the genre. Here is the whole thing, for a Customer Success Manager applying to a req whose form asks why this role:

I have run renewals for 40-plus mid-market accounts at a time, and the part I am good at is the quarter before a renewal goes wrong — the usage drop nobody has flagged yet. Your posting puts onboarding and expansion under the same owner, which is a structure I argued for in two previous jobs and never got. I would be moving from a twelve-person CS team to a four-person one, and that is deliberate: I want the part of the job where you talk to the customer, not the part where you write the handoff doc.

Ninety-eight words. It names the volume, the specific skill, the line on the posting that prompted the application, and the tradeoff the reader would otherwise stop and wonder about. Nothing in it would be true of a second applicant, which is the only test that matters here.

Where the file goes after you click submit

The path of an attached cover letter

  1. Upload

    The file is accepted if it matches the vendor's format list and size cap — .doc through .txt and up to 100 MB in Greenhouse, 2 MB per file in SmartRecruiters.

  2. Store

    It is attached to your candidate record. Workday's documented parse covers the resume instead: personal and contact information, work experience, education.

  3. Display

    It appears in the recruiter's view of your application, generally below the resume, as a link somebody has to choose to click.

  4. Search

    It is not indexed as skills, titles, or years of experience. Nothing written in the letter makes you findable in a later candidate search.

That last step is the argument in one line. A letter cannot put you into a search result; only the structured fields do that.

What to do this week

Look at the last five applications you sent and count how many carried a required cover letter field. If the answer is zero or one, you already know where the effort belongs, and it is not here.

Then write two things once and reuse them. A four-sentence explainer for whatever your application contradicts — the relocation, the odd title, the gap — and a 120-word answer to "why this role" with one blank in it where the specific reason goes. For a Project Manager that second one is worth doing properly: BLS puts median pay for project management specialists at $102,320 as of May 2025, across 1,094,300 jobs, with about 76,500 openings projected each year through 2035. Large, well-paid and competitive, decided on structured fields and a readable resume — which is exactly where the hours should go.

And if the retyping is what is eating your week, HeroApply fills the application from your resume — the same fields the parser was going to populate anyway, which leaves the writing time for the two forms that actually asked you something.

Sources

  1. Greenhouse Support — Supported formats for resumes, cover letters and other candidate uploads
  2. Greenhouse Support — Application rules overview (auto-tag, auto-advance, auto-reject)
  3. Greenhouse Support — Add a custom application question to a job post
  4. Workday Administrator Guide — Concept - Resume Parsing
  5. Workday Recruiting for Administrators — Prospects and Candidates
  6. Workday Administrator Guide — Setup Considerations - External Career Sites
  7. SmartRecruiters for Developers — Post an Application
  8. Ashby Knowledge Base — Application Forms
  9. BLS Occupational Outlook Handbook — Project Management Specialists
  10. BLS Occupational Outlook Handbook — Human Resources Specialists

Frequently asked questions

Is a cover letter required if the form says optional?

No. In Greenhouse, whoever built the job post sets each application question to Required or Optional, and an optional field submits fine when it is empty. Ashby works the same way — its documentation says all form question types support making fields required, which means a field is only mandatory when someone deliberately made it so.

Does the ATS read my cover letter?

Not as data. Workday's resume parsing populates application fields from the resume or CV, and its documented parse covers personal and contact information, work experience and education — nothing from a separate letter. The file is stored and shown to a human; it is not indexed, scored, or searched.

What file format should a cover letter be?

Match the resume and keep it text, not a picture. Greenhouse accepts .doc, .docx, .pdf, .rtf and .txt for candidate uploads, up to 100 MB. SmartRecruiters is far tighter at 2 MB per file, accepting PDF, DOC(X), RTF, JPG and PNG.

Should I paste the cover letter into a text box instead of uploading a file?

Yes, if the form offers one. A text box is a custom application question the employer wrote on purpose, which means somebody intends to read the answers side by side. Answer the question asked in about 120 words rather than pasting a full letter into it.

Can leaving the cover letter blank get me auto-rejected?

Not by itself. Greenhouse's auto-reject rule fires on answers to custom job post questions — things like a license or location requirement — and can combine conditions across up to five of them. An empty optional attachment is not one of those conditions.

Let HeroApply do the applying

It finds the jobs that match your resume, answers the screening questions in your voice, and submits the application — desktop, phone or cloud.

Get started free
Jordan Reyes

Jordan Reyes · Careers Editor

Jordan writes the resume, cover letter and interview guides — the parts of the search that happen before anyone presses Apply. Every example comes from a real job title.

The best of the blog, once a week

One email with the week’s guides. No spam, unsubscribe any time.

Keep reading

Your next opportunity starts here

Set it up once — a resume, five questions — and HeroApply takes it from there. Free to start.