Do You Still Need a Cover Letter in 2026?

When a cover letter really helps, when you can skip it, and how to write a short three-paragraph version HR will finish reading. With an example.

You find a job you really want, click apply, and see an optional Cover Letter box. The first question is: will anyone read it, or is it a waste of time? The honest answer is that it depends, and if you write one, it must be short and specific enough to add something your resume cannot.

What a cover letter is for

Your resume says what you have done. A cover letter says why you fit this job at this company, and explains what a resume cannot, such as why you are changing careers, why you have a gap, or why you want to move to another province. If your cover letter just summarises your resume again, it is not doing its job.

When you should write one

• The job post asks for it: not sending one may look like you did not read the details
• You are changing careers: it connects your past experience to the new role
• You have a gap or changed jobs often: explain briefly before the reader guesses
• You are applying to a small company or startup where the owner or team lead reads applications
• You were referred by an insider: put their name in the first sentence

When you can skip it

• The system has no field for it and does not ask
• You are using a quick-apply platform where your resume and profile are what get read
• Time is short and you must choose between tailoring your resume and writing a generic letter: tailor the resume first

A reusable letter sent to every company rarely helps and can look careless. If you do not have time to make it specific, not sending one is fine.

A three-paragraph structure readable in one minute

Paragraph 1: the role and why you are interested

Name the role and a reason specific to this company, such as a product, customers or a project you noticed, not "the company is well known".

Paragraph 2: proof you can do it

Pick one or two pieces of work that match the main requirements in the post. Say what you did and what it achieved.

Paragraph 3: close and open the door

Summarise what you want to help the team do and say you are happy to share more in an interview.

Example

Dear Khun Wipa, I am applying for the Customer Success Executive role because I see your team is growing its SME business customers, the segment I have looked after for the past three years. At my current company I created a Thai-language onboarding guide for new customers, which clearly reduced the repeated questions coming to our team. I would like to bring that experience to help your customers get started faster, and I am happy to share more details.

Note that the example contains no number that cannot be proven. If you have real numbers, use them. If not, describing a visible result is enough.

What to avoid

• Opening with "To whom it may concern" when you could find the hiring manager's name
• Going over one page, or pasting whole paragraphs from your resume
• Letting AI write the whole thing without edits: the language will be bland and miss details only you know. Use AI for a draft, but add your real story
• Forgetting to change the company name from your last application

If you are applying through an ATS, read ATS-friendly cover letters, and for a detailed walkthrough, read How to write a cover letter.

Applying by email? The email body is your cover letter

Many Thai companies still accept applications by email. In that case you do not need a separate cover letter file: let the email body do the job. Keep it shorter than a full letter, say three to five sentences. Use a clear subject line naming the role, such as "Application: Customer Success Executive, Full Name", and attach your resume as a single PDF so the reader can open it right away without downloading several files. Read more in job application email tips.

How to start

1. Read the job post and underline the three main requirements
2. Pick the piece of your work that answers the most important one
3. Find the recipient's name from the post or the company website
4. Write three paragraphs, under 250 words, and read it aloud once
5. Save it as a template, but rewrite paragraphs one and two every time

A good cover letter starts with a resume that fits the job. Tailor yours in Resume Lab first, then pick roles to apply for on the job listings page.