The BCG Casey chatbot compresses five case interview skills into 30 minutes of timed interaction with zero safety net. Unlike a live case where you can ask clarifying questions or adjust based on interviewer cues, Casey demands that you read dense exhibits, structure independently, solve math without a calculator, and deliver a polished video recommendation — all while a countdown timer runs in the corner. Candidates who treat it as a standard online test consistently underperform. Those who prepare it as a condensed, digital case interview pass at much higher rates.
What Makes Casey Different from Traditional Assessments
Casey is not a personality test, not a logic puzzle, and not a multiple-choice aptitude screen. It is a chatbot-led case interview that evaluates the same skills BCG partners look for in live rounds: problem structuring, data interpretation, quantitative reasoning, business judgment, and communication. The test typically runs 25-30 minutes, contains 6-8 questions across multiple formats, and ends with a 60-second video pitch synthesizing your recommendation.
flowchart LR
A[Invitation Email] --> B[Business Context<br>2-3 exhibits]
B --> C[Structuring Q<br>Multiple choice]
C --> D[Data Analysis<br>Chart + calculation]
D --> E[Brainstorming<br>Written response]
E --> F[Synthesis Q<br>Final analysis]
F --> G[60s Video<br>Recommendation]
style A fill:#f5f5f5
style G fill:#c8e6c9
The format varies slightly by office and role, but the core structure remains consistent: the chatbot presents a business problem (a client considering market entry, a company facing declining margins, a product launch decision), feeds you exhibits in stages, and asks progressively complex questions that build toward a final recommendation. Each question ties to one or more exhibits, and later questions often require pulling data from multiple earlier screens.
When Casey Appears in the BCG Process
Casey sits between resume screen and first-round interviews in most BCG offices. North American and European offices use it more frequently; Asian offices vary by location. Some candidates receive the invitation immediately after resume approval, others alongside or just before scheduling first-round interviews. The assessment window is typically 3-5 days, and you complete it on your own time through a secure web platform.
Why it matters: Casey is a hard filter. A weak score can end your candidacy before you ever speak to a BCG recruiter. Based on our analysis of candidate reports, roughly 70% pass the threshold, but that figure includes self-selected applicants who already cleared resume screening. The effective pass rate among all applicants is lower.
Unlike McKinsey Solve (which tests problem-solving through abstract games) or Bain SOVA (which measures aptitude and personality), Casey directly mirrors live case skills. If you cannot structure a profitability problem, interpret a margin bridge, or calculate market share under time pressure in Casey, you will struggle in BCG’s interviewer-led cases. For a detailed comparison of all three assessments, see our McKinsey Solve vs. BCG Casey vs. Bain SOVA guide.
The Five Core Skills Casey Tests
Casey evaluates the same consulting fundamentals you need in live cases, compressed into a digital format. Understanding what each skill looks like in the chatbot helps you practice the right way.
| Skill | What Casey Tests | Example Question |
|---|---|---|
| Structuring | Breaking a messy problem into MECE components | “Which of the following areas should the team investigate first?” (multiple select) |
| Brainstorming | Generating relevant drivers, risks, or options in categories | “List three factors that could explain the revenue decline.” (short written) |
| Data Analysis | Reading charts/tables and drawing correct conclusions | “Based on Exhibit 3, which region has the highest unit cost?” (single select) |
| Quantitative Reasoning | Calculating growth rates, margins, break-even, market sizing | “What is the client’s market share if total market size is $2.4B?” (numeric input) |
| Communication | Synthesizing insights and delivering a clear recommendation | 60-second video: “What should the client do and why?” |
Structuring questions appear early. You might see a problem statement and a list of possible investigation areas, then select the 3 most critical ones. Strong answers are MECE (mutually exclusive, collectively exhaustive), directly tied to the client’s objective, and informed by the exhibits. Weak answers pick generic buckets (market, competition, operations) without connecting them to the specific situation.
Brainstorming questions test organized idea generation. If asked why a retailer’s foot traffic is declining, a strong response groups reasons into categories: customer preferences shifting (online vs. in-store), competitive dynamics (new entrants nearby), external factors (demographic changes in the area), and internal factors (store layout, product mix). A weak response lists random ideas without structure.
Data analysis questions present a chart or table and ask what it implies. The trap is describing every data point instead of stating the insight. For example, if Exhibit 4 shows that Product A has 60% margin while Product B has 20% margin, the insight is not “Product A is 60% and Product B is 20%.” The insight is “Product A is three times more profitable per unit, so the client should prioritize its growth unless volume constraints exist.”
Quantitative questions require fast mental math — no calculator. You might calculate a percentage change, estimate a market size using a top-down approach, or compute a break-even point. The math is rarely complex (no calculus, no advanced finance), but it must be accurate and fast. A single arithmetic error can cascade into wrong answers on dependent questions.
Communication is tested throughout but peaks in the final video. Casey gives you 60 seconds to prepare and 60 seconds to deliver. The best structure: state your recommendation in one sentence, give two supporting reasons with evidence from the exhibits, acknowledge one key risk or assumption, and close with the next step. Weak videos ramble, bury the recommendation, or fail to reference specific data.
Common Question Formats and How to Tackle Each
Casey uses multiple formats, and switching between them is part of the challenge. Practicing each format reduces cognitive load during the real test.
Single-answer multiple choice: “Which of the following statements is supported by Exhibit 2?” Read all options before answering. Eliminate choices that contradict the data, are too broad, or rely on information not provided. The correct answer is always directly supported by the exhibit — Casey does not reward speculation.
Multiple-answer multiple select: “Select the three factors that most directly impact profitability.” Pay attention to the exact number requested. If it says “select three,” selecting two or four is wrong. Rank all options by relevance, then pick the top N. Tie-breaking logic: prefer factors the client can control over external trends, prefer quantifiable drivers over qualitative ones, and prefer factors mentioned in multiple exhibits over those in just one.
Written short answer: “List two reasons why the client’s market share declined.” Keep it concise. Each reason should be 1-2 sentences. Use categories if the question allows multiple answers (e.g., “Internal: aging product line. External: new competitor with lower prices.”). Do not write paragraphs — Casey’s grading likely checks for key concepts, not essay quality.
Numeric input: “What is the break-even volume in units?” Show your setup on scratch paper before typing. Write the formula, plug in numbers, solve step-by-step. If the answer seems unreasonable (e.g., negative margin, 300% market share), recheck your math. A wrong number here can poison later questions that depend on it.
Video recommendation: Practice this format separately. Record yourself giving 60-second pitches until the structure feels automatic. Open with the recommendation, not with “Thank you for this opportunity” or “Let me walk you through my analysis.” BCG wants decision-first communication.
The Biggest Mistakes Candidates Make
Mistake 1: Treating Casey like a personality test or aptitude screen. Casey is a case interview. You need case interview skills, not just test-taking tactics. If your only preparation is reading about “how to answer video questions,” you will fail the structuring and quant sections.
Mistake 2: Rereading all exhibits for every question. Early questions reference Exhibit 1-2. Later questions may say “refer to Exhibits 1-6.” If you reread all six exhibits every time, you run out of time. The fix: take brief notes on each exhibit as it appears (3-4 bullets per screen), then use your notes to navigate later questions.
Mistake 3: Guessing when uncertain. BCG penalizes wrong answers with -1 point, while correct answers earn +3. In a four-option question, random guessing breaks even. In a six-option question, guessing loses expected value. If you are truly stuck, skip it. If you can eliminate 2-3 options, guessing among the remainder is rational.
Mistake 4: Overthinking multiple-select questions. When asked to “select the three most important factors,” some candidates agonize for two minutes trying to distinguish between the third and fourth option. Use a triage heuristic: if two options feel equally valid, pick the one more directly tied to the client’s stated goal or the one supported by more exhibits. Move on.
Mistake 5: Rambling in the video. Sixty seconds disappears fast. If you spend 20 seconds on “Thank you, this is an interesting case,” you have 40 seconds left for the actual recommendation. Practice with a timer. Aim to state your recommendation in the first 10 seconds, support it in 30 seconds, acknowledge a caveat in 10 seconds, and close with a next step in the final 10 seconds.
How to Prepare: A Practical Timeline
If you have 2 weeks:
- Day 1-2: Learn the format. Read this guide, review the BCG case interview guide, and watch sample chatbot walkthroughs if available. Understand question types and timing.
- Day 3-5: Drill fundamentals. Practice mental math (percentages, growth rates, market sizing) for 30 minutes daily. Do 10-15 structuring prompts: given a business problem, list 3-4 MECE investigation areas in 90 seconds.
- Day 6-9: Simulate exhibit-based questions. Find case prompt PDFs (from CasesCoach or other prep platforms), set a timer, and answer questions in writing. Focus on speed: can you read a 200-word prompt + 2 charts and answer 3 questions in 6 minutes?
- Day 10-12: Full chatbot simulations. If your target office uses Casey, find or build a timed simulation that mimics the flow. Complete at least 3 full runs. After each, review where you lost time and which question types caused errors.
- Day 13-14: Video practice. Record 10 different 60-second recommendations. Watch them back. Are you stating the decision first? Are you referencing specific data? Is your body language calm? Iterate until it feels natural.
If you have 1 week: compress Days 1-5 into Days 1-2, then follow Days 6-14.
If you have 3 days: skip full case prep. Focus on mental math (2 hours), question format familiarization (2 hours), one timed simulation (1 hour), and video recording (1 hour). Accept that you cannot build deep case skills in 72 hours, but you can avoid unforced errors.
Leveraging AI Mock Practice to Build Casey Skills
The skills Casey tests — structuring, data interpretation, fast synthesis — are the same skills you practice in AI mock interviews. CasesCoach’s AI Mock Interview offers two modes that directly build Casey readiness:
Guided Mode walks you through a case with hints and prompts, training you to structure problems and interpret data even when the path forward is unclear. This mirrors Casey’s chatbot flow, where you get information in stages and must decide what matters without asking clarifying questions.
Expert Mode simulates real interview pressure and forces you to synthesize a recommendation quickly — exactly what the 60-second video pitch requires. After each mock session, you receive a 5-dimensional scorecard (Structure, Analysis, Communication, Business Acumen, Math) that shows where you are strong and where Casey will expose gaps.
Chat with Case mode is especially useful for Casey prep: you work through a real case by selecting frameworks, filling in data, and building toward a conclusion step-by-step. This trains the exhibit-to-insight muscle Casey demands. Free users can experience 3 full cases plus AI Mock trials; Pro unlocks 835+ cases and unlimited mock sessions. Start with free access to build fundamentals, then upgrade if you need more reps before your Casey deadline. Explore pricing options here.
Key Takeaways
- Casey is a digital case interview, not a generic online test — prepare it with case interview skills, not just test-taking tactics
- The assessment tests five core skills: structuring, brainstorming, data analysis, quantitative reasoning, and communication, with the final 60-second video being the synthesis checkpoint
- No calculator is allowed, so fast mental math is non-negotiable — practice percentage changes, margin calculations, and market sizing daily
- Take notes as exhibits appear to avoid rereading six screens for every question; 3-4 bullet points per exhibit is enough
- The video recommendation should follow a fixed structure: decision first, two supporting reasons with data, one caveat, one next step — practice this with a timer until it feels automatic
- Wrong answers are penalized (-1 point vs. +3 for correct), so skip questions where you are guessing randomly among four or more options
The candidates who pass Casey are not necessarily smarter or faster. They are the ones who treated it as a case interview from Day 1, practiced the format until it felt familiar, and walked into the assessment knowing exactly what to expect. If you start today, you will be one of them.