Last-Minute Case Interview Prep: What to Do in the Final 24 Hours

By MockInterview247 Team · November 2025

It’s the night before your case interview. You’ve done a few cases, skimmed some frameworks, and now the clock is ticking. The good news? You don’t need to learn anything new — you just need to refine how you think, speak, and stay calm.

Candidate preparing last-minute for case interview with notes and timer

This is your last-minute checklist — what to do (and what not to do) in the final 24 hours before your interview.

1. Focus on Clarity, Not Content

At this stage, cramming more frameworks or new industries won’t help. Instead, spend 30 minutes practicing how you communicate your structure clearly. Pick one case, pause after the prompt, and explain your structure out loud — slowly, logically, and confidently. The goal: sound like a consultant, not a student reciting notes.

2. Revisit Your Mental Math

Open your calculator-free spreadsheet or notes and refresh key percentages and shortcuts — like 10% of 480, or 1/8 as a decimal. Don’t try to “study” math; just warm up your brain. Think of it as a pre-match stretch for your quantitative reflexes.

3. Practice One Case End-to-End — Alone

Choose a case you’ve already done and re-solve it out loud without notes. Focus on flow: clarification → structure → analysis → recommendation. This reminds your brain of the rhythm and pacing of a real case. Time yourself and see if your transitions feel natural.

4. Visualize the Interview Environment

Most candidates underestimate nerves. Close your eyes and imagine the first minute: greeting the interviewer, hearing the case, pausing to think. Visualizing calm, confident behavior reduces anxiety and boosts recall when the real moment comes.

5. Prepare Your First Impression

Interviewers form opinions in the first 30 seconds. Rehearse how you’ll introduce yourself (“Hi, I’m Alex — great to meet you”) and how you’ll ask for a moment to structure your thoughts. Confidence and composure matter as much as content.

6. Get a Good Night’s Sleep — Seriously

Skipping rest to do “one more case” almost always backfires. Case interviews test thinking quality, not quantity of prep. Sleep helps your brain stay logical, patient, and sharp — exactly what a consultant needs.

7. Morning of the Interview: Warm Up Lightly

Do a quick mental math drill and review one sample structure — that’s it. Don’t overload your brain. You want to enter the interview focused, not fatigued.

Morning of the interview - calm candidate reviewing notes with coffee

8. Remember: Interviewers Want to See Thinking, Not Perfection

If you get stuck, talk through your logic. Say, “I’m considering whether the main driver could be on the cost side — let me check the numbers.” This signals real consulting behavior: transparent reasoning and composure under pressure.

In the final hours, your job is not to learn — it’s to stay calm, structured, and confident. You already know enough. Now prove you can think clearly under real-world conditions.

Want to test your readiness before the big day? Try a quick AI-led mock case on MockInterview247 — get instant feedback on how clear and structured you sound.