There’s no exact “right” answer. However, the more time you invest wisely, the better your chances of success. Planning ahead isn’t just smart. It’s strategic.
The More Time, the Better
Research shows that deeper preparation leads to stronger interview performance. One study found candidates who spent more time preparing for structured interviews achieved significantly better outcomes.
Career experts often recommend allocating 10 to 20 hours per company when interviewing for high-level or technical roles. This includes time for company research, refining answers, understanding the job spec, and preparing tailored examples.
Our own candidate insight backs this up. In a recent Cooper Lomaz survey of over 100 professionals across various industries, 27% told us they spent over 4 hours preparing for their last interview. Many cited increased confidence and better clarity during the conversation as key benefits.
What Effective Preparation Looks Like
Research the company (1 to 5 hours)
Review the company website, recent news, social media channels, and employee reviews. Understand their values, goals, and recent developments.
Understand who you’re meeting (1 to 3 hours)
If names are shared in advance, look up your interviewers on LinkedIn. Learn about their background and how your role might connect with theirs.
Refine your answers (2 to 5 hours)
Draft responses to common questions like “Tell me about yourself” and “What are your strengths?” Use the STAR method where possible to structure your answers clearly.
Build your value case (optional, 2 to 5 hours)
For roles where you really want to stand out, consider putting together a short project, task, or document that demonstrates how you’d add value in the role. This is common in tech, marketing, and commercial functions.
Practice and rehearse
Run mock interviews with a friend, career coach, or in front of a mirror. Practising your responses out loud will help you refine your delivery and identify any gaps.
Prepare your logistics
Choose your outfit, confirm the format of the interview, double check technology if it’s virtual, and make sure you’re clear on the time and location.
How Long Is Enough?
Minimal preparation: 3 to 6 hours
Sufficient for roles you’re already confident in or ones where the interview process is informal.
Solid preparation: 10 to 15 hours
Ideal for most permanent roles where there are multiple stages and you’re expected to demonstrate a clear understanding of the company and the job.
Deep preparation: 15 to 20+ hours
Recommended for competitive or senior positions where a task, project or panel interview is involved.
What You Should Ask Before the Interview
Good preparation starts with good information. Don’t hesitate to ask these questions before the interview:
Who will I be meeting?
This allows you to prepare for different personalities and roles in the room.
Is there anything specific I should prepare for?
Find out if there will be a task, technical test, or case study.
What should I wear?
Dress codes can vary widely. Asking in advance ensures you look the part without feeling overdressed or underdressed.
Will the interview be virtual or in-person?
If virtual, test your tech in advance. If in-person, plan your journey and arrival time.
The Final Word
Preparing for an interview can feel daunting, especially if you’re working around other responsibilities. But it’s also the final step before landing the role you want. The effort you put in now will shape your chances of success.
A few hours can help. A few days can change the outcome. And being overprepared rarely backfires.
If you’re in the interview process for a role through Cooper Lomaz, your consultant can guide you on exactly what to prepare, who you’re meeting, and what to expect. We’re here to help you succeed.
