Is a Cover Letter Necessary? When to Include One and How to Write It

A cover letter can help you add context to a job application, but it is not required in every situation. Whether you should include one depends on the employer’s instructions, the application method and whether the letter gives useful information that your CV alone cannot explain.

A good cover letter is not a second CV. It should briefly connect your relevant experience and skills with the role you are applying for.

What Is a Cover Letter?

A cover letter is a short document or message that accompanies a job application. It introduces your application and explains why you are interested in the role and why your relevant experience may make you a suitable candidate.

It can be especially useful when you need to provide context, such as changing careers, returning after a career break or explaining why experience from another field is relevant.

Is a Cover Letter Always Necessary?

No. Follow the employer’s application instructions. If a cover letter is required, submit one. If it is optional, consider whether it allows you to add useful information that is not already clear from your CV and application form.

Do not assume that sending a cover letter automatically improves every application. A generic or poorly targeted letter can add little value.

When a Cover Letter Can Be Useful

When you are changing careers

A cover letter can help connect transferable skills from your previous experience with the new career direction.

When you have relevant context to explain

You may need to briefly explain a career break, return to work or other part of your career history. Keep the explanation professional and avoid unnecessary personal detail.

When you can show a strong connection with the role

If you can clearly explain why your experience matches a specific responsibility or requirement, a cover letter can strengthen the connection.

When the employer specifically asks for one

Follow the instructions carefully. Ignoring a requested document can suggest that you have not completed the application properly.

What a Good Cover Letter Should Do

A useful cover letter should help the employer quickly understand:

• Which role you are applying for.
• Why you are interested in the opportunity.
• Which relevant skills or experience you bring.
• How your background connects with the requirements.
• Why you would like to discuss the opportunity further.

What a Cover Letter Should Not Do

• Repeat your CV line by line.
• Use the same generic letter for every employer.
• Make exaggerated claims.
• Include an unnecessary personal life story.
• Use a very long introduction before getting to the relevant evidence.

How to Structure a Cover Letter

Opening paragraph

State the role you are applying for and give a concise reason for your interest.

Middle paragraph

Focus on one or two examples of relevant experience, skills or achievements. Explain the connection rather than simply listing abilities.

Final paragraph

Briefly reinforce your interest and close professionally.

How to Tailor a Cover Letter to a Job

Start with the job description. Identify the main responsibilities and the skills that appear most important. Then select genuine examples from your background that demonstrate relevant ability.

Tailoring means changing the emphasis of your real experience for the opportunity. It does not mean inventing achievements or copying phrases without evidence.

For help understanding job requirements, read our guide to understanding a job description.

Using a Cover Letter to Explain a Career Break or Career Change

A cover letter can provide brief context when your CV may not tell the full story. For example, you might explain how skills from a previous career transfer to the role you want now.

Keep the explanation short and move quickly to your relevant evidence. For more help with career breaks, see how to explain employment gaps on your CV.

Common Cover Letter Mistakes

• Sending the wrong company or job name.
• Repeating the CV instead of adding context.
• Writing a generic letter for every application.
• Focusing only on what you want from the job.
• Making unsupported claims about your abilities.
• Ignoring spelling and grammar mistakes.
• Making the letter much longer than necessary.

Should You Send a Cover Letter by Email?

Follow the application instructions. If an employer asks you to apply by email, make sure your message and attachments follow the requested format. If a cover letter is requested, provide it in the way the employer specifies.

Do not rely on one approach for every application, because recruitment systems and employer preferences vary.

How Long Should a Cover Letter Be?

There is no need to make a cover letter long. Include enough information to explain your interest and relevant evidence clearly, then stop. The reader should be able to understand the main message without searching through repeated or unnecessary information.

Cover Letter Checklist Before You Apply

1. Check the employer’s instructions.
2. Confirm the job title and company name.
3. Explain why you are interested in the role.
4. Include relevant evidence rather than vague claims.
5. Tailor the letter to the opportunity.
6. Check spelling, grammar and names.
7. Make sure the letter adds value beyond your CV.

Frequently Asked Questions

Is a cover letter more important than a CV?

They serve different purposes. The CV provides a structured summary of your experience and skills, while a cover letter can add context and explain your connection with a specific opportunity.

Should I send a cover letter if it is optional?

Consider sending one if it adds useful, role-specific information. If the letter would only repeat your CV, it may not add much value.

Can I use the same cover letter for every job?

You can keep a basic structure, but the content should be adapted to each suitable role.

Should a cover letter explain an employment gap?

It can provide brief context when necessary, but avoid allowing the gap to dominate the application.

Final Thoughts

A cover letter can strengthen a job application when it provides useful context and clearly connects your experience with the role. The best approach is to follow the employer’s instructions, keep the letter focused and avoid repeating information that is already obvious from your CV.

For broader guidance, read our How to Write a CV for a Job in the UK: Complete Guide, Job Interview Preparation: Complete Guide and How to Get a Job in the UK: Complete Job Search Guide.