Is a cover letter necessary on an application form?

The short version

The rest of this page explains why, shows a structure that fits in 150 words, and walks through an example.

How cover letters show up on modern application forms

Most applications today go through an employer's applicant tracking system (ATS) rather than an email inbox. The employer decides, per job, whether the form includes a cover letter field and whether it is required. That is why one company's form asks for a letter and the next company's form has no space for one.

The field usually appears in one of three forms:

• A file upload next to the résumé upload, sometimes labelled "Cover letter (optional)".
• A free-text box, which may have a character limit. Short limits are a clear signal to keep it brief.
• A disguised question, such as "Why do you want to work here?" or "Tell us why you are a good fit for this role". This is a cover letter in all but name.

Treat the third type as required even if it is technically optional. Recruiters often read these answers before anything else. Our guide to writing answers to screening questions covers how to approach them.

When is a cover letter optional, and when is it really expected?

Usually worth writing

• Smaller companies, where one person often reads every application.
• Roles in writing, communications, policy, research, education and the public sector, where written communication is part of the job.
• Career changes, where your résumé alone does not explain why you are applying.
• Gaps or unusual timelines you want to explain in one line.
• Relocation or visa situations that need a sentence of context, alongside honest answers to the form's own questions (see work authorisation and sponsorship questions).

Often safe to skip

• Large, high-volume hiring where the field is optional and the posting does not mention a letter.
• Roles where screening questions already cover motivation and fit.
• Any case where the only thing you could write is generic praise of the company.

A weak letter can hurt more than no letter. A recruiter who opens a template that names the wrong company, or one that repeats the résumé line by line, has learned something unhelpful about you. If you skip, put the effort into a résumé tailored to the posting instead: see how to tailor your résumé for each job.

A 150-word cover letter structure

Short letters get read. Around 150 words fits most text boxes, can be skimmed in under a minute and forces you to keep only what matters. Use four short parts.

1. Opening (1 to 2 sentences, about 25 words). Name the role and give one concrete reason you are applying to this company, not any company.
2. Evidence (2 to 3 sentences, about 60 words). Two achievements from your real experience that match the top requirements in the posting. Use numbers you can stand behind.
3. Fit (1 to 2 sentences, about 40 words). Connect your experience to a specific part of the role: a product, a team goal or a problem mentioned in the posting.
4. Close (1 sentence, about 20 words). Say you would welcome a conversation, and add any practical detail they need, such as notice period or location.

Skip "To whom it may concern" and "I am writing to apply for". The form already knows which job you are applying for. Start with the reason.

A worked example

Here is the structure applied to an invented posting for a customer success manager at a software company whose posting stresses onboarding and reducing churn. The candidate and numbers are made up to show the shape; use your own.

Opening: "I am applying for the Customer Success Manager role because your focus on onboarding mid-sized teams is the work I enjoy most and have done for the past four years."

Evidence: "At my current company I manage a portfolio of 40 accounts and rebuilt our onboarding checklist, which cut the time to first value from six weeks to three. I also set up quarterly reviews for at-risk accounts, and renewals in my portfolio have improved every year since."

Fit: "Your posting mentions scaling onboarding without adding headcount. I have built self-serve guides and templated calls to do exactly that, and I would like to bring the same approach to your customers."

Close: "I would welcome a conversation. I am based in Manchester and my notice period is four weeks."

That comes to roughly 140 words. Notice what is missing: no list of soft skills, no restating the job title in every paragraph, no flattery. Each sentence either proves something or answers a practical question.

Common mistakes that cost more than skipping the letter

• Naming the wrong company or role, usually from copying a previous letter.
• Repeating the résumé in paragraph form instead of picking two relevant points.
• Claiming skills or results you could not discuss in an interview.
• Writing 500 words into a box that clearly expects a paragraph.
• Uploading a file that is not readable, such as an image of a letter or a file with a password.
• Explaining negatives at length. One neutral sentence is enough.

If a form asks for a file, a PDF or Word document with plain formatting is the safe choice. Match the file name to your name and the role so it is easy to find.

Do cover letters matter if you apply to many jobs?

If you are sending a high volume of applications, writing a fresh 300-word letter for each one is not realistic, and it is not needed. Focus your effort: write short tailored letters where they are required or clearly read, and skip optional fields where you have nothing specific to add. Our guide on how many jobs you should apply to looks at balancing volume and quality.

When a form asks for a cover letter, Applysent writes a short one based on your profile and the posting, without inventing experience you do not have. In review mode you can read and edit it before anything is sent, and the receipt for each application shows exactly what was written. You can see how that fits the rest of the process on the how it works section, or join the waitlist for early access.

Frequently asked questions

Is a cover letter necessary in 2026?

Only when the form requires it or the posting asks for one. For optional fields, write one if you have something specific to say about the role, and skip it if the letter would be generic.

How long should a cover letter be on an application form?

Around 150 words is enough for most text boxes and uploads. If the form sets a character limit, treat it as the ideal length rather than a target to stretch towards.

Do recruiters actually read cover letters?

Some do and some do not, and it varies by company and role. Smaller teams and writing-heavy roles are more likely to read them, which is why a short, specific letter is the safe choice.

Can I reuse one cover letter for every job?

You can reuse the structure, but change the opening, the evidence and the fit for each role. A letter that could be sent to any company tells the reader very little.

Should I upload a cover letter if the field is optional?

Upload one if it adds something the résumé does not, such as a career change, relocation or a strong reason for wanting this specific job. Otherwise leaving it empty is fine.

Is it acceptable to use AI to help write a cover letter?

Many people use tools to draft, but read and edit the result so every claim is true and sounds like you. Our guide on whether recruiters know you used AI covers this in more detail.