If your résumé and cover letter have been impressive enough to get you an interview, the job could be yours, provided you perform well when you meet the hiring manager.

Even the most experienced professionals can get flustered and hurt their chances. With a little preparation, you can avoid the most common interview mistakes. Here are 15 things you should not do in an interview.

1. Not doing your research

You might have the skills to do the job, but do you understand how the company operates? Review the company website, mission statement, recent news, and key competitors before your interview.

2. Turning up late

Unless you have a genuine emergency and contact the employer beforehand, arriving late creates a poor first impression and can raise concerns about your reliability.

3. Dressing inappropriately

Professional attire is still the safest approach for most interviews. First impressions matter, and how you present yourself can influence how seriously you're taken.

4. Fidgeting with unnecessary props

Cell phones, chewing gum, nail files, and similar distractions do not belong at the interview table. Keep your focus on the conversation.

5. Poor body language

Eye contact, good posture, a positive attitude, and a confident handshake can go a long way. Negative body language may undermine an otherwise strong interview.

6. Unclear answers and rambling

Take a moment to think before answering. Avoid long-winded responses that lose direction, and speak clearly so the interviewer can easily follow your points.

7. Speaking negatively about your current employer

Never complain about your current or former employer. Even if your experience was difficult, criticism can reflect poorly on your professionalism.

8. Not asking questions

Employers expect candidates to be curious about the role and company. Thoughtful questions demonstrate genuine interest and preparation.

9. Lying on your résumé

Anything included on your résumé may come up during the interview. Embellishments and inaccuracies can damage your credibility and professional reputation.

10. Getting too personal or familiar

Avoid sharing personal financial struggles or behaving too casually. Interviews should remain professional and focused on your qualifications.

11. Not bringing extra copies of your résumé

If multiple people are conducting the interview, having additional copies available shows preparation and professionalism.

12. Sitting down before you're invited

Wait until you're offered a seat. Once seated, maintain good posture and avoid slouching.

13. Discussing money or time off too early

Unless a formal offer is on the table, avoid making salary, vacation, or benefits your primary focus during the interview.

14. Interrupting the interviewer

Listen carefully and allow the interviewer to finish speaking before responding. Interruptions can come across as impatient or disrespectful.

15. Forgetting to follow up

A brief thank-you email after the interview reinforces your interest in the role and helps you remain memorable as hiring decisions are made.

What's next?

Avoiding these mistakes can help you present yourself more confidently and professionally throughout the interview process. For additional guidance, explore our job interview advice or browse our latest job opportunities.

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