MBB Assessment Prep — Updated for 2026
You get one shot at McKinsey, BCG & Bain. Simulate the online test first.
500+ free cases, real assessment simulations from 500+ candidate debriefs. PSG, Casey Chatbot, SOVA — the exact formats, not textbook theory.
500+Free cases
500+Debriefs collected
92%Format match rate
Choose Your Assessment Prep
McKinsey & Company
McKinsey Assessment Prep
- Problem Solving Game (PSG) — 60+ scenarios developed and verified by our ex-MBB consultants
- Redrock Study — full data sets & solutions we reconstructed
- SeatBolt — timed practice with scoring
- Ecosystem Building — 40+ mini-cases from candidate debriefs
Boston Consulting Group
BCG Assessment Prep
- Detailed BCG Guidebook — format breakdown, scoring logic & strategy
- Casey Chatbot — 30+ cases built from real candidate debriefs
- HireVue Video Recording — practice & replay your responses
- 5 Key Cases — the scenarios that matter most, updated monthly
Bain & Company
Bain Assessment Prep
- HireVue Assessment — 45+ video prompts we compiled
- BOVA Online Test — 70+ practice questions
- TestGorilla — cognitive & situational sets curated by our team
- SHL & Pymetrics — complete prep bundles
AI Interview Simulation
AI Case Interview
- Voice-to-voice — practice with real-time AI pushback
- 50+ McKinsey-style cases included
- Scored on Structure, Accuracy & Confidence
- Audio replay so you actually improve
No Account Required
Free Practice Materials
Start here. Sample real assessment formats before you commit — no sign-up, no credit card.
Free — 5 casesCase Framework Guide
5 free profitability & market entry cases with step-by-step frameworks. See how MBB structures questions — then decide if you need the full bank.
Practice Free
Free — 10 drillsMental Math Warm-Up
10 timed chart interpretation and market sizing drills. The same data complexity you'll face in the PSG — practice until the format feels automatic.
Start Drills
Free — 20 questionsPEI Question Bank (Free)
20 Personal Experience Interview questions organized by theme. Model answer structures from candidates who received MBB offers.
View Questions
Free — 500+ casesCase Library — 500+ Cases
500+ written case studies you can read, filter, and study at your own pace. Q&A breakdowns, difficulty ratings, and structured solutions — all free, no AI, no paywall.
Browse Cases
Free — Free guidesCandidate Prep Blog
Recruiting timelines, test format breakdowns, and strategy guides. Updated every cycle with the latest candidate debriefs.
Read the BlogLike what you see? Unlock the full 500+ case library
500+
Free cases in our library
500+
Candidate debriefs collected
92%
Said our simulations matched the real test
Q1 2026
Latest question bank update
What Candidates Are Saying
“The Casey Chatbot questions were almost identical to what I saw in the real BCG test. I recognized the chart formats, the question phrasing, even the way data was structured. Felt like a re-take, not a first attempt. I contacted their support team with a question and got a response within hours.”
Verified Candidate
BCG offer, 2025 cycle, Top-3 Strategy Firm
“I failed the McKinsey PSG cold the first time. Found CaseDrill, drilled 40+ scenarios over two weeks, and passed on my re-application. You can tell the team behind this actually understands the process — the question formats were spot-on.”
Verified Candidate
McKinsey PSG, second attempt pass, MBB Firm
“Spent three months with generic casebooks and bombed every online assessment. CaseDrill had the actual test formats — SOVA, Casey, PSG — not just theory. Passed all three firms in the same cycle.”
Verified Candidate
All 3 MBB assessments passed, MBB Offer Holder
Trusted by candidates targeting
McKinsey & CompanyBCGBain & CompanyDeloitteKearneyOliver WymanMT Program
Source: candidates who used CaseDrill in the 2024–2026 recruiting cycles. Not affiliated with, endorsed by, or sponsored by any firm listed.
Why our questions are different
Sourced from real tests
Every question is paraphrased from candidate debriefs we collect directly — not invented by textbook authors. Our research team gathers reports from each recruiting season and rebuilds the question bank.
Updated every cycle
Firms change their tests. We track those changes. The question bank is refreshed quarterly by our research team from new candidate debriefs so you never practice on outdated material.
Verified for accuracy
92% of candidates report that our simulations closely matched what they saw in the real assessment. Our team of ex-consultants has been through the process — we built the prep we wished existed.
Focus on what matters
We highlight the cases most likely to appear on your real test. No filler — just the scenarios our research team has flagged as high-probability based on the latest candidate debriefs.
We built the prep system every candidate deserves.
500+ cases in our library. Every MBB assessment format. Updated for the 2026 recruiting season. Try 5 cases free — see how close they are to the real thing. Full refund within 7 days, no questions asked.