5 Interview Mistakes That Cost Candidates Roles (and How Employers Say to Avoid Them)

Recruiter insights on the errors that ruin interviews and how to avoid them. 

A strong CV can get you through the door. But a poor interview performance can cost you the role. UK employers tell us they see the same mistakes repeated by candidates, regardless of experience level. The good news is these mistakes are easy to avoid once you know what hiring managers are looking for. 

At JobReadyCV.co.uk, we combine cv help uk with practical interview insights from employers. That way, you are prepared not just to get the interview but to succeed in it. 

Mistake 1: Not Researching the Employer 

Employers say the fastest way to fail an interview is to show no knowledge of the company. A candidate who cannot name the business’s services or values looks unprepared. 

How to avoid it: 

• Spend 20 minutes on the company website. 

• Prepare one or two insights about the organization. 

• Link your skills to their needs. 

Mistake 2: Overusing Generic Answers 

Saying “I’m a hard worker” or “I’m a team player” does not prove value. Employers want evidence. 

How to avoid it: 

• Use the STAR method (Situation, Task, Action, Result). 

• Provide numbers or outcomes when possible. 

• Replace vague claims with measurable achievements. 

👉 Not sure how to phrase achievements? Our resume writing experts help you turn duties into results-driven statements. 

Mistake 3: Talking Too Much (or Too Little) 

Employers say balance is key. Talking endlessly without answering the question is as damaging as giving one-word responses. 

How to avoid it: 

• Answer directly. 

• Add context and one example. 

• Stop once your point is clear. 

Mistake 4: Failing to Ask Questions 

When candidates do not ask questions, employers assume a lack of interest. 

How to avoid it: 

Prepare 2–3 thoughtful questions, such as: 

• “What does success look like in this role after six months?” 

• “How does your team support professional development?” 

Mistake 5: Ignoring Body Language 

Employers notice confidence signals. Slouching, lack of eye contact, or crossing arms can undermine even strong answers. 

How to avoid it: 

• Sit upright and lean slightly forward. 

• Maintain eye contact without staring. 

• Smile to convey confidence and approachability. 

How to Prepare Better Interviews with CV Writing Packages 

Your interview performance is easier when you already have strong application materials. With our cv writing packages, you get: 

• CV written with employer insights. 

• Cover letter that complements your application. 

• Guidance on tailoring answers to employer needs. 

👉 See our Cover Letter Examples for inspiration. 

Final Checklist Before Your Next Interview 

✅ Have you researched the company? 

✅ Are your answers specific and backed by results? 

✅ Do you strike the right balance in communication? 

✅ Have you prepared thoughtful questions? 

✅ Is your body language confident and open? 

If not, start preparing now. Employers say avoiding these mistakes can make the difference between rejection and an offer. 

Final Thoughts 

Most interview mistakes aren’t about lack of skill; they happen when candidates forget to show confidence, preparation, or genuine interest. The good news is that every one of these mistakes can be avoided with a little insight and practice.

At JobReadyCV, we work closely with UK employers, so we understand what makes candidates stand out in interviews. From your CV to your final handshake, we help you present yourself clearly, confidently, and professionally, the way hiring managers actually want to see.

FAQS: Interview Mistakes

What’s the most common interview mistake candidates make? 

The biggest one is not tailoring answers to the job. Employers notice when you give generic responses. Always refer back to the company’s goals or values, as it shows you’ve done your homework.

How can I calm my nerves before an interview? 

Practice aloud, research the company, and prepare two or three success stories that show your strengths. Confidence comes from preparation, not perfection.

What should I do if I realise I made a mistake during the interview? 

Stay calm. Correct yourself politely if needed, or refocus on a positive point. Employers appreciate honesty and composure more than flawless answers. 

How can I stand out in a competitive interview? 

Use real examples and metrics, such as “I improved delivery accuracy by 15%” or “Handled 50+ customer inquiries per day with 100% satisfaction.” Numbers make your achievements more memorable.

Can JobReadyCV help me prepare for interviews? 

Yes! Our experts create employer-approved CVs and cover letters that help you make a strong first impression, and we can share tailored advice on how to present yourself confidently in interviews.