A well-crafted cover letter continues to play a critical role in job applications, even in an era where AI screening tools and digital portfolios dominate recruitment processes. For many employers, a cover letter provides insights beyond what a CV can show. It reflects communication skills, attention to detail, and genuine interest in the role. Yet, countless candidates still make mistakes that can ruin their chances of getting noticed.

Knowing what not to put in your cover letter is as crucial as knowing what to include, especially in 2025 when the job market becomes more competitive. If you want to make a lasting and polished impression, you should avoid the frequent mistakes listed below.

1. Using Generic Templates Without Personalisation

In 2025, personalisation continues to be crucial. Sending a cover letter that appears to have been copied and pasted will give recruiters the impression that you are not a serious candidate. Whenever possible, mention the hiring manager's name, make reference to the company's values, and describe how your abilities complement the objectives of the company. In an AI-driven hiring environment, a customized cover letter shows effort and distinguishes your application.

2. Overusing AI-Generated Content Without Editing

AI tools are helpful for brainstorming, but depending too much on them can make your cover letter seem robotic and impersonal. Recruiters may quickly spot too formal or repetitive language that is frequently generated by AI systems. To make sure the content represents your genuine voice and aligns with the company's tone, always proofread and modify it. Employers still value authenticity and can tell when it is lacking.

3. Repeating Your CV

Your CV should not be repeated in a cover letter. There is no benefit to just restating your work history. Instead, concentrate on emphasising accomplishments, outlining changes in your career, or presenting pertinent experiences that show why you are the best candidate. In the cover letter, provide an overview that relates your experience to the position's needs.

4. Ignoring Keywords That Align with Job Descriptions

In 2025, Applicant Tracking Systems (ATS) continue to utilise keywords to filter applications. Relevant terms should be incorporated organically, while keyword stuffing should be avoided. Examine the job description and, if applicable, highlight important abilities or capabilities in your letter. This enhances your ATS application and demonstrates your understanding of the requirements of the position.

5. Writing in an Overly Formal or Casual Tone

Tone is more important than ever. An overly formal letter may come across as outdated, while an overly informal one may come across as unprofessional. Try to use a tone that is both professional and friendly. Use clear, straightforward phrases and stay away from jargon unless it is required by the business. Finding the ideal balance makes you seem like a relatable and trustworthy candidate to hiring managers.

6. Overlooking Structure and Readability

Hiring managers frequently quickly scan through several applications. Important points will be overlooked if your cover letter is unstructured and overflowing with text. Make use of excellent formatting, logical flow, and brief paragraphs. Begin with an attention-grabbing opening, then share relevant experiences before concluding with enthusiasm for the opportunity at hand. Your letter will be easier to read and more remembered if it is well-organised and clear.

7. Forgetting a Strong Call to Action

A closing statement should not be an afterthought. Avoid vague sentences like "I hope to hear from you soon." Instead, demonstrate your confidence in your qualifications and enthusiasm to discuss the role further. A professional call to action, such as requesting an interview or a follow-up discussion, conveys a positive and proactive tone.

Your cover letter can be a powerful tool to showcase your unique value, provided you avoid these common mistakes. In 2025, personalisation, authenticity, and clarity remain the cornerstones of an effective application. Take the time to refine your letter, and you will significantly increase your chances of moving to the next stage.

If you found this helpful, you might also like How to Write a CV That Gets Noticed by Recruiters