How to write a cover letter that actually works

Many people think the cover letter is an outdated formality. The reality is that, when two candidates have a similar CV, a good letter makes the difference. It’s your chance to show personality, explain why you fit and prove you researched the company. Here’s how to write one that adds instead of subtracts.

When do you need a letter?

They don’t always ask for one, but it’s worth having ready when:

• The job posting explicitly requests it.
• You apply by direct email to a recruiter.
• You’re changing fields or have a gap in your history you want to explain.
• You want to stand out for a very competitive role.

If the form has no field for it and they don’t ask, don’t force it. But when there’s space, use it.

The four-paragraph structure

An effective letter fits on half a page (3–4 paragraphs) and follows this order:

1. Opening with a hook. Skip the classic “I am writing to apply…”. Start by saying which role you’re applying for and one specific reason it excites you. Example: “I’m applying for the data analyst role because I’ve spent three years turning numbers into decisions, exactly what you describe in your posting.”

2. Why you’re the candidate. Connect your experience to what the role needs. Pick one or two relevant achievements and tell them with results. Don’t repeat your whole CV: highlight what matters most for THAT role.

3. Why this company. Show you did your research. Mention something real: a product, a value, a recent project. This separates those who send generic letters from those who genuinely want the job.

4. Closing with a call to action. Thank them, show willingness for an interview and sign off warmly. Example: “I’d love to discuss how I can contribute to your team. I look forward to your reply.”

Tips that make the difference

• Personalize the recipient. If you know who’s hiring, use their name (“Dear Ms. Gómez”). If not, “Dear hiring team” beats “To whom it may concern.”
• Use the posting’s words. As in the CV, mirror the terms the company uses.
• Talk about what you can bring, not just what you want. The recruiter is thinking about their need, not yours.
• Be specific. “Increased sales by 15%” is more convincing than “I’m proactive and hardworking.”
• Mind the tone. Professional but human. Neither robotic nor overly casual.

Mistakes that get it discarded

• Generic letters that work for any company: they’re spotted a mile away.
• Repeating the CV word for word.
• Spelling errors or another company’s name (it happens more than you’d think when reusing templates).
• Too long: nobody reads a page and a half.
• Talking only about yourself without connecting to what the company needs.

Quick template

Dear [name or hiring team],

I’m applying for the [role] because [specific reason tied to the posting].

At [company/previous role] I achieved [achievement with a number], experience that aligns with [what the role requires].

I’m especially drawn to [company] because of [something real you researched].

I’d love to discuss how I can contribute. Thank you for your time.

Sincerely, [your name].

Tailor it to each job and you’ll have a letter that opens doors. Once it’s ready, put it to work: at RápidoEmpleo you’ll find new jobs every day where your letter can make the difference.